1 /*-------------------------------------------------------------------------
3 pcode.c - post code generation
5 Written By - Scott Dattalo scott@dattalo.com
6 Ported to PIC16 By - Martin Dubuc m.dubuc@rogers.com
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 -------------------------------------------------------------------------*/
25 #include "common.h" // Include everything in the SDCC src directory
31 #include "pcodeflow.h"
35 extern char *pic16_aopGet (struct asmop *aop, int offset, bool bit16, bool dname);
37 #if defined(__BORLANDC__) || defined(_MSC_VER)
38 #define STRCASECMP stricmp
41 #define STRCASECMP strcasecmp
44 #define DUMP_DF_GRAPHS 0
46 /****************************************************************/
47 /****************************************************************/
49 static peepCommand peepCommands[] = {
51 {NOTBITSKIP, "_NOTBITSKIP_"},
52 {BITSKIP, "_BITSKIP_"},
53 {INVERTBITSKIP, "_INVERTBITSKIP_"},
60 // Eventually this will go into device dependent files:
61 pCodeOpReg pic16_pc_status = {{PO_STATUS, "STATUS"}, -1, NULL,0,NULL};
62 pCodeOpReg pic16_pc_intcon = {{PO_INTCON, "INTCON"}, -1, NULL,0,NULL};
63 pCodeOpReg pic16_pc_pcl = {{PO_PCL, "PCL"}, -1, NULL,0,NULL};
64 pCodeOpReg pic16_pc_pclath = {{PO_PCLATH, "PCLATH"}, -1, NULL,0,NULL};
65 pCodeOpReg pic16_pc_pclatu = {{PO_PCLATU, "PCLATU"}, -1, NULL,0,NULL}; // patch 14
66 pCodeOpReg pic16_pc_wreg = {{PO_WREG, "WREG"}, -1, NULL,0,NULL};
67 pCodeOpReg pic16_pc_bsr = {{PO_BSR, "BSR"}, -1, NULL,0,NULL};
69 pCodeOpReg pic16_pc_tosl = {{PO_SFR_REGISTER, "TOSL"}, -1, NULL,0,NULL}; // patch 14
70 pCodeOpReg pic16_pc_tosh = {{PO_SFR_REGISTER, "TOSH"}, -1, NULL,0,NULL}; //
71 pCodeOpReg pic16_pc_tosu = {{PO_SFR_REGISTER, "TOSU"}, -1, NULL,0,NULL}; // patch 14
73 pCodeOpReg pic16_pc_tblptrl = {{PO_SFR_REGISTER, "TBLPTRL"}, -1, NULL,0,NULL}; // patch 15
74 pCodeOpReg pic16_pc_tblptrh = {{PO_SFR_REGISTER, "TBLPTRH"}, -1, NULL,0,NULL}; //
75 pCodeOpReg pic16_pc_tblptru = {{PO_SFR_REGISTER, "TBLPTRU"}, -1, NULL,0,NULL}; //
76 pCodeOpReg pic16_pc_tablat = {{PO_SFR_REGISTER, "TABLAT"}, -1, NULL,0,NULL}; // patch 15
78 //pCodeOpReg pic16_pc_fsr0 = {{PO_FSR0, "FSR0"}, -1, NULL,0,NULL}; //deprecated !
80 pCodeOpReg pic16_pc_fsr0l = {{PO_FSR0, "FSR0L"}, -1, NULL, 0, NULL};
81 pCodeOpReg pic16_pc_fsr0h = {{PO_FSR0, "FSR0H"}, -1, NULL, 0, NULL};
82 pCodeOpReg pic16_pc_fsr1l = {{PO_FSR0, "FSR1L"}, -1, NULL, 0, NULL};
83 pCodeOpReg pic16_pc_fsr1h = {{PO_FSR0, "FSR1H"}, -1, NULL, 0, NULL};
84 pCodeOpReg pic16_pc_fsr2l = {{PO_FSR0, "FSR2L"}, -1, NULL, 0, NULL};
85 pCodeOpReg pic16_pc_fsr2h = {{PO_FSR0, "FSR2H"}, -1, NULL, 0, NULL};
87 pCodeOpReg pic16_pc_indf0 = {{PO_INDF0, "INDF0"}, -1, NULL,0,NULL};
88 pCodeOpReg pic16_pc_postinc0 = {{PO_INDF0, "POSTINC0"}, -1, NULL, 0, NULL};
89 pCodeOpReg pic16_pc_postdec0 = {{PO_INDF0, "POSTDEC0"}, -1, NULL, 0, NULL};
90 pCodeOpReg pic16_pc_preinc0 = {{PO_INDF0, "PREINC0"}, -1, NULL, 0, NULL};
91 pCodeOpReg pic16_pc_plusw0 = {{PO_INDF0, "PLUSW0"}, -1, NULL, 0, NULL};
93 pCodeOpReg pic16_pc_indf1 = {{PO_INDF0, "INDF1"}, -1, NULL,0,NULL};
94 pCodeOpReg pic16_pc_postinc1 = {{PO_INDF0, "POSTINC1"}, -1, NULL, 0, NULL};
95 pCodeOpReg pic16_pc_postdec1 = {{PO_INDF0, "POSTDEC1"}, -1, NULL, 0, NULL};
96 pCodeOpReg pic16_pc_preinc1 = {{PO_INDF0, "PREINC1"}, -1, NULL, 0, NULL};
97 pCodeOpReg pic16_pc_plusw1 = {{PO_INDF0, "PLUSW1"}, -1, NULL, 0, NULL};
99 pCodeOpReg pic16_pc_indf2 = {{PO_INDF0, "INDF2"}, -1, NULL,0,NULL};
100 pCodeOpReg pic16_pc_postinc2 = {{PO_INDF0, "POSTINC2"}, -1, NULL, 0, NULL};
101 pCodeOpReg pic16_pc_postdec2 = {{PO_INDF0, "POSTDEC2"}, -1, NULL, 0, NULL};
102 pCodeOpReg pic16_pc_preinc2 = {{PO_INDF0, "PREINC2"}, -1, NULL, 0, NULL};
103 pCodeOpReg pic16_pc_plusw2 = {{PO_INDF0, "PLUSW2"}, -1, NULL, 0, NULL};
105 pCodeOpReg pic16_pc_prodl = {{PO_PRODL, "PRODL"}, -1, NULL, 0, NULL};
106 pCodeOpReg pic16_pc_prodh = {{PO_PRODH, "PRODH"}, -1, NULL, 0, NULL};
108 /* EEPROM registers */
109 pCodeOpReg pic16_pc_eecon1 = {{PO_SFR_REGISTER, "EECON1"}, -1, NULL, 0, NULL};
110 pCodeOpReg pic16_pc_eecon2 = {{PO_SFR_REGISTER, "EECON2"}, -1, NULL, 0, NULL};
111 pCodeOpReg pic16_pc_eedata = {{PO_SFR_REGISTER, "EEDATA"}, -1, NULL, 0, NULL};
112 pCodeOpReg pic16_pc_eeadr = {{PO_SFR_REGISTER, "EEADR"}, -1, NULL, 0, NULL};
114 pCodeOpReg pic16_pc_kzero = {{PO_GPR_REGISTER, "KZ"}, -1, NULL,0,NULL};
115 pCodeOpReg pic16_pc_wsave = {{PO_GPR_REGISTER, "WSAVE"}, -1, NULL,0,NULL};
116 pCodeOpReg pic16_pc_ssave = {{PO_GPR_REGISTER, "SSAVE"}, -1, NULL,0,NULL};
118 pCodeOpReg *pic16_stackpnt_lo;
119 pCodeOpReg *pic16_stackpnt_hi;
120 pCodeOpReg *pic16_stack_postinc;
121 pCodeOpReg *pic16_stack_postdec;
122 pCodeOpReg *pic16_stack_preinc;
123 pCodeOpReg *pic16_stack_plusw;
125 pCodeOpReg *pic16_framepnt_lo;
126 pCodeOpReg *pic16_framepnt_hi;
127 pCodeOpReg *pic16_frame_postinc;
128 pCodeOpReg *pic16_frame_postdec;
129 pCodeOpReg *pic16_frame_preinc;
130 pCodeOpReg *pic16_frame_plusw;
132 pCodeOpReg pic16_pc_gpsimio = {{PO_GPR_REGISTER, "GPSIMIO"}, -1, NULL, 0, NULL};
133 pCodeOpReg pic16_pc_gpsimio2 = {{PO_GPR_REGISTER, "GPSIMIO2"}, -1, NULL, 0, NULL};
135 char *OPT_TYPE_STR[] = { "begin", "end", "jumptable_begin", "jumptable_end" };
136 char *LR_TYPE_STR[] = { "entry begin", "entry end", "exit begin", "exit end" };
139 static int mnemonics_initialized = 0;
142 static hTab *pic16MnemonicsHash = NULL;
143 static hTab *pic16pCodePeepCommandsHash = NULL;
145 static pFile *the_pFile = NULL;
146 static pBlock *pb_dead_pcodes = NULL;
148 /* Hardcoded flags to change the behavior of the PIC port */
149 static int peepOptimizing = 1; /* run the peephole optimizer if nonzero */
150 static int functionInlining = 1; /* inline functions if nonzero */
151 int pic16_debug_verbose = 0; /* Set true to inundate .asm file */
153 int pic16_pcode_verbose = 0;
155 //static int GpCodeSequenceNumber = 1;
156 static int GpcFlowSeq = 1;
158 extern void pic16_RemoveUnusedRegisters(void);
159 extern void pic16_RegsUnMapLiveRanges(void);
160 extern void pic16_BuildFlowTree(pBlock *pb);
161 extern void pic16_pCodeRegOptimizeRegUsage(int level);
162 extern int pic16_picIsInitialized(void);
163 extern void SAFE_snprintf(char **str, size_t *size, const char *format, ...);
164 extern int mnem2key(char const *mnem);
166 /****************************************************************/
167 /* Forward declarations */
168 /****************************************************************/
170 void pic16_unlinkpCode(pCode *pc);
172 static void genericAnalyze(pCode *pc);
173 static void AnalyzeGOTO(pCode *pc);
174 static void AnalyzeSKIP(pCode *pc);
175 static void AnalyzeRETURN(pCode *pc);
178 static void genericDestruct(pCode *pc);
179 static void genericPrint(FILE *of,pCode *pc);
181 static void pCodePrintLabel(FILE *of, pCode *pc);
182 static void pCodePrintFunction(FILE *of, pCode *pc);
183 static void pCodeOpPrint(FILE *of, pCodeOp *pcop);
184 static char *pic16_get_op_from_instruction( pCodeInstruction *pcc);
185 char *pic16_get_op(pCodeOp *pcop,char *buff,size_t buf_size);
186 int pCodePeepMatchLine(pCodePeep *peepBlock, pCode *pcs, pCode *pcd);
187 int pic16_pCodePeepMatchRule(pCode *pc);
188 static void pBlockStats(FILE *of, pBlock *pb);
189 static pBlock *newpBlock(void);
190 extern void pic16_pCodeInsertAfter(pCode *pc1, pCode *pc2);
191 extern pCodeOp *pic16_popCopyReg(pCodeOpReg *pc);
192 pCodeOp *pic16_popCopyGPR2Bit(pCodeOp *pc, int bitval);
193 void pic16_pCodeRegMapLiveRanges(pBlock *pb);
194 void OptimizeLocalRegs(void);
195 pCodeOp *pic16_popGet2p(pCodeOp *src, pCodeOp *dst);
197 char *dumpPicOptype(PIC_OPTYPE type);
199 pCodeOp *pic16_popGetLit2(int, pCodeOp *);
200 pCodeOp *pic16_popGetLit(int);
201 pCodeOp *pic16_popGetWithString(char *);
202 extern int inWparamList(char *s);
204 /** data flow optimization helpers **/
205 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
206 static void pic16_vcg_dump (FILE *of, pBlock *pb);
207 static void pic16_vcg_dump_default (pBlock *pb);
209 static int pic16_pCodeIsAlive (pCode *pc);
210 static void pic16_df_stats ();
211 static void pic16_createDF (pBlock *pb);
212 static int pic16_removeUnusedRegistersDF ();
213 static void pic16_destructDF (pBlock *pb);
214 static void releaseStack ();
216 /****************************************************************/
217 /* PIC Instructions */
218 /****************************************************************/
220 pCodeInstruction pic16_pciADDWF = {
221 {PC_OPCODE, NULL, NULL, 0, NULL,
235 1,0, // dest, bit instruction
237 0, // literal operand
239 0, // fast call/return mode select bit
240 0, // second memory operand
241 0, // second literal operand
243 (PCC_W | PCC_REGISTER), // inCond
244 (PCC_REGISTER | PCC_STATUS), // outCond
248 pCodeInstruction pic16_pciADDFW = {
249 {PC_OPCODE, NULL, NULL, 0, NULL,
263 0,0, // dest, bit instruction
265 0, // literal operand
267 0, // fast call/return mode select bit
268 0, // second memory operand
269 0, // second literal operand
271 (PCC_W | PCC_REGISTER), // inCond
272 (PCC_W | PCC_STATUS), // outCond
276 pCodeInstruction pic16_pciADDWFC = { // mdubuc - New
277 {PC_OPCODE, NULL, NULL, 0, NULL,
291 1,0, // dest, bit instruction
293 0, // literal operand
295 0, // fast call/return mode select bit
296 0, // second memory operand
297 0, // second literal operand
299 (PCC_W | PCC_REGISTER | PCC_C), // inCond
300 (PCC_REGISTER | PCC_STATUS), // outCond
304 pCodeInstruction pic16_pciADDFWC = {
305 {PC_OPCODE, NULL, NULL, 0, NULL,
319 0,0, // dest, bit instruction
321 0, // literal operand
323 0, // fast call/return mode select bit
324 0, // second memory operand
325 0, // second literal operand
327 (PCC_W | PCC_REGISTER | PCC_C), // inCond
328 (PCC_W | PCC_STATUS), // outCond
332 pCodeInstruction pic16_pciADDLW = {
333 {PC_OPCODE, NULL, NULL, 0, NULL,
347 0,0, // dest, bit instruction
349 1, // literal operand
351 0, // fast call/return mode select bit
352 0, // second memory operand
353 0, // second literal operand
355 (PCC_W | PCC_LITERAL), // inCond
356 (PCC_W | PCC_STATUS), // outCond
360 pCodeInstruction pic16_pciANDLW = {
361 {PC_OPCODE, NULL, NULL, 0, NULL,
375 0,0, // dest, bit instruction
377 1, // literal operand
379 0, // fast call/return mode select bit
380 0, // second memory operand
381 0, // second literal operand
383 (PCC_W | PCC_LITERAL), // inCond
384 (PCC_W | PCC_Z | PCC_N), // outCond
388 pCodeInstruction pic16_pciANDWF = {
389 {PC_OPCODE, NULL, NULL, 0, NULL,
403 1,0, // dest, bit instruction
405 0, // literal operand
407 0, // fast call/return mode select bit
408 0, // second memory operand
409 0, // second literal operand
411 (PCC_W | PCC_REGISTER), // inCond
412 (PCC_REGISTER | PCC_Z | PCC_N), // outCond
416 pCodeInstruction pic16_pciANDFW = {
417 {PC_OPCODE, NULL, NULL, 0, NULL,
431 0,0, // dest, bit instruction
433 0, // literal operand
435 0, // fast call/return mode select bit
436 0, // second memory operand
437 0, // second literal operand
439 (PCC_W | PCC_REGISTER), // inCond
440 (PCC_W | PCC_Z | PCC_N) // outCond
443 pCodeInstruction pic16_pciBC = { // mdubuc - New
444 {PC_OPCODE, NULL, NULL, 0, NULL,
458 0,0, // dest, bit instruction
460 0, // literal operand
462 0, // fast call/return mode select bit
463 0, // second memory operand
464 0, // second literal operand
466 (PCC_REL_ADDR | PCC_C), // inCond
471 pCodeInstruction pic16_pciBCF = {
472 {PC_OPCODE, NULL, NULL, 0, NULL,
486 1,1, // dest, bit instruction
488 0, // literal operand
490 0, // fast call/return mode select bit
491 0, // second memory operand
492 0, // second literal operand
494 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
495 PCC_REGISTER, // outCond
499 pCodeInstruction pic16_pciBN = { // mdubuc - New
500 {PC_OPCODE, NULL, NULL, 0, NULL,
514 0,0, // dest, bit instruction
516 0, // literal operand
518 0, // fast call/return mode select bit
519 0, // second memory operand
520 0, // second literal operand
522 (PCC_REL_ADDR | PCC_N), // inCond
523 PCC_NONE , // outCond
527 pCodeInstruction pic16_pciBNC = { // mdubuc - New
528 {PC_OPCODE, NULL, NULL, 0, NULL,
542 0,0, // dest, bit instruction
544 0, // literal operand
546 0, // fast call/return mode select bit
547 0, // second memory operand
548 0, // second literal operand
550 (PCC_REL_ADDR | PCC_C), // inCond
551 PCC_NONE , // outCond
555 pCodeInstruction pic16_pciBNN = { // mdubuc - New
556 {PC_OPCODE, NULL, NULL, 0, NULL,
570 0,0, // dest, bit instruction
572 0, // literal operand
574 0, // fast call/return mode select bit
575 0, // second memory operand
576 0, // second literal operand
578 (PCC_REL_ADDR | PCC_N), // inCond
579 PCC_NONE , // outCond
583 pCodeInstruction pic16_pciBNOV = { // mdubuc - New
584 {PC_OPCODE, NULL, NULL, 0, NULL,
598 0,0, // dest, bit instruction
600 0, // literal operand
602 0, // fast call/return mode select bit
603 0, // second memory operand
604 0, // second literal operand
606 (PCC_REL_ADDR | PCC_OV), // inCond
607 PCC_NONE , // outCond
611 pCodeInstruction pic16_pciBNZ = { // mdubuc - New
612 {PC_OPCODE, NULL, NULL, 0, NULL,
626 0,0, // dest, bit instruction
628 0, // literal operand
630 0, // fast call/return mode select bit
631 0, // second memory operand
632 0, // second literal operand
634 (PCC_REL_ADDR | PCC_Z), // inCond
635 PCC_NONE , // outCond
639 pCodeInstruction pic16_pciBOV = { // mdubuc - New
640 {PC_OPCODE, NULL, NULL, 0, NULL,
654 0,0, // dest, bit instruction
656 0, // literal operand
658 0, // fast call/return mode select bit
659 0, // second memory operand
660 0, // second literal operand
662 (PCC_REL_ADDR | PCC_OV), // inCond
663 PCC_NONE , // outCond
667 pCodeInstruction pic16_pciBRA = { // mdubuc - New
668 {PC_OPCODE, NULL, NULL, 0, NULL,
682 0,0, // dest, bit instruction
684 0, // literal operand
686 0, // fast call/return mode select bit
687 0, // second memory operand
688 0, // second literal operand
690 PCC_REL_ADDR, // inCond
691 PCC_NONE , // outCond
695 pCodeInstruction pic16_pciBSF = {
696 {PC_OPCODE, NULL, NULL, 0, NULL,
710 1,1, // dest, bit instruction
712 0, // literal operand
714 0, // fast call/return mode select bit
715 0, // second memory operand
716 0, // second literal operand
718 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
719 (PCC_REGISTER | PCC_EXAMINE_PCOP), // outCond
723 pCodeInstruction pic16_pciBTFSC = {
724 {PC_OPCODE, NULL, NULL, 0, NULL,
738 0,1, // dest, bit instruction
740 0, // literal operand
742 0, // fast call/return mode select bit
743 0, // second memory operand
744 0, // second literal operand
746 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
747 PCC_EXAMINE_PCOP, // outCond
751 pCodeInstruction pic16_pciBTFSS = {
752 {PC_OPCODE, NULL, NULL, 0, NULL,
766 0,1, // dest, bit instruction
768 0, // literal operand
770 0, // fast call/return mode select bit
771 0, // second memory operand
772 0, // second literal operand
774 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
775 PCC_EXAMINE_PCOP, // outCond
779 pCodeInstruction pic16_pciBTG = { // mdubuc - New
780 {PC_OPCODE, NULL, NULL, 0, NULL,
794 0,1, // dest, bit instruction
796 0, // literal operand
798 0, // fast call/return mode select bit
799 0, // second memory operand
800 0, // second literal operand
802 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
803 (PCC_REGISTER | PCC_EXAMINE_PCOP), // outCond
807 pCodeInstruction pic16_pciBZ = { // mdubuc - New
808 {PC_OPCODE, NULL, NULL, 0, NULL,
822 0,0, // dest, bit instruction
824 0, // literal operand
826 0, // fast call/return mode select bit
827 0, // second memory operand
828 0, // second literal operand
830 (PCC_REL_ADDR | PCC_Z), // inCond
835 pCodeInstruction pic16_pciCALL = {
836 {PC_OPCODE, NULL, NULL, 0, NULL,
850 0,0, // dest, bit instruction
852 0, // literal operand
854 1, // fast call/return mode select bit
855 0, // second memory operand
856 0, // second literal operand
863 pCodeInstruction pic16_pciCOMF = {
864 {PC_OPCODE, NULL, NULL, 0, NULL,
878 1,0, // dest, bit instruction
880 0, // literal operand
882 0, // fast call/return mode select bit
883 0, // second memory operand
884 0, // second literal operand
886 PCC_REGISTER, // inCond
887 (PCC_REGISTER | PCC_Z | PCC_N) , // outCond
891 pCodeInstruction pic16_pciCOMFW = {
892 {PC_OPCODE, NULL, NULL, 0, NULL,
906 0,0, // dest, bit instruction
908 0, // literal operand
910 0, // fast call/return mode select bit
911 0, // second memory operand
912 0, // second literal operand
914 PCC_REGISTER, // inCond
915 (PCC_W | PCC_Z | PCC_N) , // outCond
919 pCodeInstruction pic16_pciCLRF = {
920 {PC_OPCODE, NULL, NULL, 0, NULL,
934 0,0, // dest, bit instruction
936 0, // literal operand
938 0, // fast call/return mode select bit
939 0, // second memory operand
940 0, // second literal operand
943 (PCC_REGISTER | PCC_Z), // outCond
947 pCodeInstruction pic16_pciCLRWDT = {
948 {PC_OPCODE, NULL, NULL, 0, NULL,
962 0,0, // dest, bit instruction
964 0, // literal operand
966 0, // fast call/return mode select bit
967 0, // second memory operand
968 0, // second literal operand
971 PCC_NONE , // outCond
975 pCodeInstruction pic16_pciCPFSEQ = { // mdubuc - New
976 {PC_OPCODE, NULL, NULL, 0, NULL,
990 0,0, // dest, bit instruction
992 0, // literal operand
994 0, // fast call/return mode select bit
995 0, // second memory operand
996 0, // second literal operand
998 (PCC_W | PCC_REGISTER), // inCond
999 PCC_NONE , // outCond
1003 pCodeInstruction pic16_pciCPFSGT = { // mdubuc - New
1004 {PC_OPCODE, NULL, NULL, 0, NULL,
1011 NULL, // from branch
1018 0,0, // dest, bit instruction
1019 1,1, // branch, skip
1020 0, // literal operand
1021 1, // RAM access bit
1022 0, // fast call/return mode select bit
1023 0, // second memory operand
1024 0, // second literal operand
1026 (PCC_W | PCC_REGISTER), // inCond
1027 PCC_NONE , // outCond
1031 pCodeInstruction pic16_pciCPFSLT = { // mdubuc - New
1032 {PC_OPCODE, NULL, NULL, 0, NULL,
1039 NULL, // from branch
1046 1,0, // dest, bit instruction
1047 1,1, // branch, skip
1048 0, // literal operand
1049 1, // RAM access bit
1050 0, // fast call/return mode select bit
1051 0, // second memory operand
1052 0, // second literal operand
1054 (PCC_W | PCC_REGISTER), // inCond
1055 PCC_NONE , // outCond
1059 pCodeInstruction pic16_pciDAW = {
1060 {PC_OPCODE, NULL, NULL, 0, NULL,
1067 NULL, // from branch
1074 0,0, // dest, bit instruction
1075 0,0, // branch, skip
1076 0, // literal operand
1077 0, // RAM access bit
1078 0, // fast call/return mode select bit
1079 0, // second memory operand
1080 0, // second literal operand
1083 (PCC_W | PCC_C), // outCond
1087 pCodeInstruction pic16_pciDCFSNZ = { // mdubuc - New
1088 {PC_OPCODE, NULL, NULL, 0, NULL,
1095 NULL, // from branch
1102 1,0, // dest, bit instruction
1103 1,1, // branch, skip
1104 0, // literal operand
1105 1, // RAM access bit
1106 0, // fast call/return mode select bit
1107 0, // second memory operand
1108 0, // second literal operand
1110 PCC_REGISTER, // inCond
1111 PCC_REGISTER , // outCond
1115 pCodeInstruction pic16_pciDCFSNZW = { // mdubuc - New
1116 {PC_OPCODE, NULL, NULL, 0, NULL,
1123 NULL, // from branch
1130 0,0, // dest, bit instruction
1131 1,1, // branch, skip
1132 0, // literal operand
1133 1, // RAM access bit
1134 0, // fast call/return mode select bit
1135 0, // second memory operand
1136 0, // second literal operand
1138 PCC_REGISTER, // inCond
1143 pCodeInstruction pic16_pciDECF = {
1144 {PC_OPCODE, NULL, NULL, 0, NULL,
1151 NULL, // from branch
1158 1,0, // dest, bit instruction
1159 0,0, // branch, skip
1160 0, // literal operand
1161 1, // RAM access bit
1162 0, // fast call/return mode select bit
1163 0, // second memory operand
1164 0, // second literal operand
1166 PCC_REGISTER, // inCond
1167 (PCC_REGISTER | PCC_STATUS) , // outCond
1171 pCodeInstruction pic16_pciDECFW = {
1172 {PC_OPCODE, NULL, NULL, 0, NULL,
1179 NULL, // from branch
1186 0,0, // dest, bit instruction
1187 0,0, // branch, skip
1188 0, // literal operand
1189 1, // RAM access bit
1190 0, // fast call/return mode select bit
1191 0, // second memory operand
1192 0, // second literal operand
1194 PCC_REGISTER, // inCond
1195 (PCC_W | PCC_STATUS) , // outCond
1199 pCodeInstruction pic16_pciDECFSZ = {
1200 {PC_OPCODE, NULL, NULL, 0, NULL,
1207 NULL, // from branch
1214 1,0, // dest, bit instruction
1215 1,1, // branch, skip
1216 0, // literal operand
1217 1, // RAM access bit
1218 0, // fast call/return mode select bit
1219 0, // second memory operand
1220 0, // second literal operand
1222 PCC_REGISTER, // inCond
1223 PCC_REGISTER , // outCond
1227 pCodeInstruction pic16_pciDECFSZW = {
1228 {PC_OPCODE, NULL, NULL, 0, NULL,
1235 NULL, // from branch
1242 0,0, // dest, bit instruction
1243 1,1, // branch, skip
1244 0, // literal operand
1245 1, // RAM access bit
1246 0, // fast call/return mode select bit
1247 0, // second memory operand
1248 0, // second literal operand
1250 PCC_REGISTER, // inCond
1255 pCodeInstruction pic16_pciGOTO = {
1256 {PC_OPCODE, NULL, NULL, 0, NULL,
1263 NULL, // from branch
1270 0,0, // dest, bit instruction
1271 1,0, // branch, skip
1272 0, // literal operand
1273 0, // RAM access bit
1274 0, // fast call/return mode select bit
1275 0, // second memory operand
1276 0, // second literal operand
1278 PCC_REL_ADDR, // inCond
1279 PCC_NONE , // outCond
1283 pCodeInstruction pic16_pciINCF = {
1284 {PC_OPCODE, NULL, NULL, 0, NULL,
1291 NULL, // from branch
1298 1,0, // dest, bit instruction
1299 0,0, // branch, skip
1300 0, // literal operand
1301 1, // RAM access bit
1302 0, // fast call/return mode select bit
1303 0, // second memory operand
1304 0, // second literal operand
1306 PCC_REGISTER, // inCond
1307 (PCC_REGISTER | PCC_STATUS), // outCond
1311 pCodeInstruction pic16_pciINCFW = {
1312 {PC_OPCODE, NULL, NULL, 0, NULL,
1319 NULL, // from branch
1326 0,0, // dest, bit instruction
1327 0,0, // branch, skip
1328 0, // literal operand
1329 1, // RAM access bit
1330 0, // fast call/return mode select bit
1331 0, // second memory operand
1332 0, // second literal operand
1334 PCC_REGISTER, // inCond
1335 (PCC_W | PCC_STATUS) , // outCond
1339 pCodeInstruction pic16_pciINCFSZ = {
1340 {PC_OPCODE, NULL, NULL, 0, NULL,
1347 NULL, // from branch
1354 1,0, // dest, bit instruction
1355 1,1, // branch, skip
1356 0, // literal operand
1357 1, // RAM access bit
1358 0, // fast call/return mode select bit
1359 0, // second memory operand
1360 0, // second literal operand
1362 PCC_REGISTER, // inCond
1363 PCC_REGISTER , // outCond
1367 pCodeInstruction pic16_pciINCFSZW = {
1368 {PC_OPCODE, NULL, NULL, 0, NULL,
1375 NULL, // from branch
1382 0,0, // dest, bit instruction
1383 1,1, // branch, skip
1384 0, // literal operand
1385 1, // RAM access bit
1386 0, // fast call/return mode select bit
1387 0, // second memory operand
1388 0, // second literal operand
1390 PCC_REGISTER, // inCond
1395 pCodeInstruction pic16_pciINFSNZ = { // mdubuc - New
1396 {PC_OPCODE, NULL, NULL, 0, NULL,
1403 NULL, // from branch
1410 1,0, // dest, bit instruction
1411 1,1, // branch, skip
1412 0, // literal operand
1413 1, // RAM access bit
1414 0, // fast call/return mode select bit
1415 0, // second memory operand
1416 0, // second literal operand
1418 PCC_REGISTER, // inCond
1419 PCC_REGISTER , // outCond
1423 pCodeInstruction pic16_pciINFSNZW = { // vrokas - New
1424 {PC_OPCODE, NULL, NULL, 0, NULL,
1431 NULL, // from branch
1438 0,0, // dest, bit instruction
1439 1,1, // branch, skip
1440 0, // literal operand
1441 1, // RAM access bit
1442 0, // fast call/return mode select bit
1443 0, // second memory operand
1444 0, // second literal operand
1446 PCC_REGISTER, // inCond
1451 pCodeInstruction pic16_pciIORWF = {
1452 {PC_OPCODE, NULL, NULL, 0, NULL,
1459 NULL, // from branch
1466 1,0, // dest, bit instruction
1467 0,0, // branch, skip
1468 0, // literal operand
1469 1, // RAM access bit
1470 0, // fast call/return mode select bit
1471 0, // second memory operand
1472 0, // second literal operand
1474 (PCC_W | PCC_REGISTER), // inCond
1475 (PCC_REGISTER | PCC_Z | PCC_N), // outCond
1479 pCodeInstruction pic16_pciIORFW = {
1480 {PC_OPCODE, NULL, NULL, 0, NULL,
1487 NULL, // from branch
1494 0,0, // dest, bit instruction
1495 0,0, // branch, skip
1496 0, // literal operand
1497 1, // RAM access bit
1498 0, // fast call/return mode select bit
1499 0, // second memory operand
1500 0, // second literal operand
1502 (PCC_W | PCC_REGISTER), // inCond
1503 (PCC_W | PCC_Z | PCC_N), // outCond
1507 pCodeInstruction pic16_pciIORLW = {
1508 {PC_OPCODE, NULL, NULL, 0, NULL,
1515 NULL, // from branch
1522 0,0, // dest, bit instruction
1523 0,0, // branch, skip
1524 1, // literal operand
1525 0, // RAM access bit
1526 0, // fast call/return mode select bit
1527 0, // second memory operand
1528 0, // second literal operand
1530 (PCC_W | PCC_LITERAL), // inCond
1531 (PCC_W | PCC_Z | PCC_N), // outCond
1535 pCodeInstruction pic16_pciLFSR = { // mdubuc - New
1536 {PC_OPCODE, NULL, NULL, 0, NULL,
1543 NULL, // from branch
1550 0,0, // dest, bit instruction
1551 0,0, // branch, skip
1552 1, // literal operand
1553 0, // RAM access bit
1554 0, // fast call/return mode select bit
1555 0, // second memory operand
1556 1, // second literal operand
1558 PCC_LITERAL, // inCond
1559 PCC_NONE, // outCond
1563 pCodeInstruction pic16_pciMOVF = {
1564 {PC_OPCODE, NULL, NULL, 0, NULL,
1571 NULL, // from branch
1578 1,0, // dest, bit instruction
1579 0,0, // branch, skip
1580 0, // literal operand
1581 1, // RAM access bit
1582 0, // fast call/return mode select bit
1583 0, // second memory operand
1584 0, // second literal operand
1586 PCC_REGISTER, // inCond
1587 (PCC_Z | PCC_N), // outCond
1591 pCodeInstruction pic16_pciMOVFW = {
1592 {PC_OPCODE, NULL, NULL, 0, NULL,
1599 NULL, // from branch
1606 0,0, // dest, bit instruction
1607 0,0, // branch, skip
1608 0, // literal operand
1609 1, // RAM access bit
1610 0, // fast call/return mode select bit
1611 0, // second memory operand
1612 0, // second literal operand
1614 PCC_REGISTER, // inCond
1615 (PCC_W | PCC_N | PCC_Z), // outCond
1619 pCodeInstruction pic16_pciMOVFF = { // mdubuc - New
1620 {PC_OPCODE, NULL, NULL, 0, NULL,
1627 NULL, // from branch
1634 0,0, // dest, bit instruction
1635 0,0, // branch, skip
1636 0, // literal operand
1637 0, // RAM access bit
1638 0, // fast call/return mode select bit
1639 1, // second memory operand
1640 0, // second literal operand
1642 PCC_REGISTER, // inCond
1643 PCC_REGISTER2, // outCond
1647 pCodeInstruction pic16_pciMOVLB = { // mdubuc - New
1648 {PC_OPCODE, NULL, NULL, 0, NULL,
1654 NULL, // from branch
1661 0,0, // dest, bit instruction
1662 0,0, // branch, skip
1663 1, // literal operand
1664 0, // RAM access bit
1665 0, // fast call/return mode select bit
1666 0, // second memory operand
1667 0, // second literal operand
1669 (PCC_NONE | PCC_LITERAL), // inCond
1670 PCC_REGISTER, // outCond - BSR
1674 pCodeInstruction pic16_pciMOVLW = {
1675 {PC_OPCODE, NULL, NULL, 0, NULL,
1681 NULL, // from branch
1688 0,0, // dest, bit instruction
1689 0,0, // branch, skip
1690 1, // literal operand
1691 0, // RAM access bit
1692 0, // fast call/return mode select bit
1693 0, // second memory operand
1694 0, // second literal operand
1696 (PCC_NONE | PCC_LITERAL), // inCond
1701 pCodeInstruction pic16_pciMOVWF = {
1702 {PC_OPCODE, NULL, NULL, 0, NULL,
1709 NULL, // from branch
1716 0,0, // dest, bit instruction
1717 0,0, // branch, skip
1718 0, // literal operand
1719 1, // RAM access bit
1720 0, // fast call/return mode select bit
1721 0, // second memory operand
1722 0, // second literal operand
1725 PCC_REGISTER, // outCond
1729 pCodeInstruction pic16_pciMULLW = { // mdubuc - New
1730 {PC_OPCODE, NULL, NULL, 0, NULL,
1736 NULL, // from branch
1743 0,0, // dest, bit instruction
1744 0,0, // branch, skip
1745 1, // literal operand
1746 0, // RAM access bit
1747 0, // fast call/return mode select bit
1748 0, // second memory operand
1749 0, // second literal operand
1751 (PCC_W | PCC_LITERAL), // inCond
1752 PCC_NONE, // outCond - PROD
1756 pCodeInstruction pic16_pciMULWF = { // mdubuc - New
1757 {PC_OPCODE, NULL, NULL, 0, NULL,
1763 NULL, // from branch
1770 0,0, // dest, bit instruction
1771 0,0, // branch, skip
1772 0, // literal operand
1773 1, // RAM access bit
1774 0, // fast call/return mode select bit
1775 0, // second memory operand
1776 0, // second literal operand
1778 (PCC_W | PCC_REGISTER), // inCond
1779 PCC_REGISTER, // outCond - PROD
1783 pCodeInstruction pic16_pciNEGF = { // mdubuc - New
1784 {PC_OPCODE, NULL, NULL, 0, NULL,
1790 NULL, // from branch
1797 0,0, // dest, bit instruction
1798 0,0, // branch, skip
1799 0, // literal operand
1800 1, // RAM access bit
1801 0, // fast call/return mode select bit
1802 0, // second memory operand
1803 0, // second literal operand
1805 PCC_REGISTER, // inCond
1806 (PCC_REGISTER | PCC_STATUS), // outCond
1810 pCodeInstruction pic16_pciNOP = {
1811 {PC_OPCODE, NULL, NULL, 0, NULL,
1817 NULL, // from branch
1824 0,0, // dest, bit instruction
1825 0,0, // branch, skip
1826 0, // literal operand
1827 0, // RAM access bit
1828 0, // fast call/return mode select bit
1829 0, // second memory operand
1830 0, // second literal operand
1833 PCC_NONE, // outCond
1837 pCodeInstruction pic16_pciPOP = { // mdubuc - New
1838 {PC_OPCODE, NULL, NULL, 0, NULL,
1844 NULL, // from branch
1851 0,0, // dest, bit instruction
1852 0,0, // branch, skip
1853 0, // literal operand
1854 0, // RAM access bit
1855 0, // fast call/return mode select bit
1856 0, // second memory operand
1857 0, // second literal operand
1860 PCC_NONE , // outCond
1864 pCodeInstruction pic16_pciPUSH = {
1865 {PC_OPCODE, NULL, NULL, 0, NULL,
1871 NULL, // from branch
1878 0,0, // dest, bit instruction
1879 0,0, // branch, skip
1880 0, // literal operand
1881 0, // RAM access bit
1882 0, // fast call/return mode select bit
1883 0, // second memory operand
1884 0, // second literal operand
1887 PCC_NONE , // outCond
1891 pCodeInstruction pic16_pciRCALL = { // mdubuc - New
1892 {PC_OPCODE, NULL, NULL, 0, NULL,
1898 NULL, // from branch
1905 0,0, // dest, bit instruction
1906 1,0, // branch, skip
1907 0, // literal operand
1908 0, // RAM access bit
1909 0, // fast call/return mode select bit
1910 0, // second memory operand
1911 0, // second literal operand
1913 PCC_REL_ADDR, // inCond
1914 PCC_NONE , // outCond
1918 pCodeInstruction pic16_pciRETFIE = {
1919 {PC_OPCODE, NULL, NULL, 0, NULL,
1926 NULL, // from branch
1933 0,0, // dest, bit instruction
1934 1,0, // branch, skip
1935 0, // literal operand
1936 0, // RAM access bit
1937 1, // fast call/return mode select bit
1938 0, // second memory operand
1939 0, // second literal operand
1942 PCC_NONE, // outCond (not true... affects the GIE bit too)
1946 pCodeInstruction pic16_pciRETLW = {
1947 {PC_OPCODE, NULL, NULL, 0, NULL,
1954 NULL, // from branch
1961 0,0, // dest, bit instruction
1962 1,0, // branch, skip
1963 1, // literal operand
1964 0, // RAM access bit
1965 0, // fast call/return mode select bit
1966 0, // second memory operand
1967 0, // second literal operand
1969 PCC_LITERAL, // inCond
1974 pCodeInstruction pic16_pciRETURN = {
1975 {PC_OPCODE, NULL, NULL, 0, NULL,
1982 NULL, // from branch
1989 0,0, // dest, bit instruction
1990 1,0, // branch, skip
1991 0, // literal operand
1992 0, // RAM access bit
1993 1, // fast call/return mode select bit
1994 0, // second memory operand
1995 0, // second literal operand
1998 PCC_NONE, // outCond
2001 pCodeInstruction pic16_pciRLCF = { // mdubuc - New
2002 {PC_OPCODE, NULL, NULL, 0, NULL,
2009 NULL, // from branch
2016 1,0, // dest, bit instruction
2017 0,0, // branch, skip
2018 0, // literal operand
2019 1, // RAM access bit
2020 0, // fast call/return mode select bit
2021 0, // second memory operand
2022 0, // second literal operand
2024 (PCC_C | PCC_REGISTER), // inCond
2025 (PCC_REGISTER | PCC_C | PCC_Z | PCC_N), // outCond
2029 pCodeInstruction pic16_pciRLCFW = { // mdubuc - New
2030 {PC_OPCODE, NULL, NULL, 0, NULL,
2037 NULL, // from branch
2044 0,0, // dest, bit instruction
2045 0,0, // branch, skip
2046 0, // literal operand
2047 1, // RAM access bit
2048 0, // fast call/return mode select bit
2049 0, // second memory operand
2050 0, // second literal operand
2052 (PCC_C | PCC_REGISTER), // inCond
2053 (PCC_W | PCC_C | PCC_Z | PCC_N), // outCond
2057 pCodeInstruction pic16_pciRLNCF = { // mdubuc - New
2058 {PC_OPCODE, NULL, NULL, 0, NULL,
2065 NULL, // from branch
2072 1,0, // dest, bit instruction
2073 0,0, // branch, skip
2074 0, // literal operand
2075 1, // RAM access bit
2076 0, // fast call/return mode select bit
2077 0, // second memory operand
2078 0, // second literal operand
2080 PCC_REGISTER, // inCond
2081 (PCC_REGISTER | PCC_Z | PCC_N), // outCond
2084 pCodeInstruction pic16_pciRLNCFW = { // mdubuc - New
2085 {PC_OPCODE, NULL, NULL, 0, NULL,
2092 NULL, // from branch
2099 0,0, // dest, bit instruction
2100 0,0, // branch, skip
2101 0, // literal operand
2102 1, // RAM access bit
2103 0, // fast call/return mode select bit
2104 0, // second memory operand
2105 0, // second literal operand
2107 PCC_REGISTER, // inCond
2108 (PCC_W | PCC_Z | PCC_N), // outCond
2111 pCodeInstruction pic16_pciRRCF = { // mdubuc - New
2112 {PC_OPCODE, NULL, NULL, 0, NULL,
2119 NULL, // from branch
2126 1,0, // dest, bit instruction
2127 0,0, // branch, skip
2128 0, // literal operand
2129 1, // RAM access bit
2130 0, // fast call/return mode select bit
2131 0, // second memory operand
2132 0, // second literal operand
2134 (PCC_C | PCC_REGISTER), // inCond
2135 (PCC_REGISTER | PCC_C | PCC_Z | PCC_N), // outCond
2138 pCodeInstruction pic16_pciRRCFW = { // mdubuc - New
2139 {PC_OPCODE, NULL, NULL, 0, NULL,
2146 NULL, // from branch
2153 0,0, // dest, bit instruction
2154 0,0, // branch, skip
2155 0, // literal operand
2156 1, // RAM access bit
2157 0, // fast call/return mode select bit
2158 0, // second memory operand
2159 0, // second literal operand
2161 (PCC_C | PCC_REGISTER), // inCond
2162 (PCC_W | PCC_C | PCC_Z | PCC_N), // outCond
2165 pCodeInstruction pic16_pciRRNCF = { // mdubuc - New
2166 {PC_OPCODE, NULL, NULL, 0, NULL,
2173 NULL, // from branch
2180 1,0, // dest, bit instruction
2181 0,0, // branch, skip
2182 0, // literal operand
2183 1, // RAM access bit
2184 0, // fast call/return mode select bit
2185 0, // second memory operand
2186 0, // second literal operand
2188 PCC_REGISTER, // inCond
2189 (PCC_REGISTER | PCC_Z | PCC_N), // outCond
2193 pCodeInstruction pic16_pciRRNCFW = { // mdubuc - New
2194 {PC_OPCODE, NULL, NULL, 0, NULL,
2201 NULL, // from branch
2208 0,0, // dest, bit instruction
2209 0,0, // branch, skip
2210 0, // literal operand
2211 1, // RAM access bit
2212 0, // fast call/return mode select bit
2213 0, // second memory operand
2214 0, // second literal operand
2216 PCC_REGISTER, // inCond
2217 (PCC_W | PCC_Z | PCC_N), // outCond
2221 pCodeInstruction pic16_pciSETF = { // mdubuc - New
2222 {PC_OPCODE, NULL, NULL, 0, NULL,
2229 NULL, // from branch
2236 0,0, // dest, bit instruction
2237 0,0, // branch, skip
2238 0, // literal operand
2239 1, // RAM access bit
2240 0, // fast call/return mode select bit
2241 0, // second memory operand
2242 0, // second literal operand
2245 PCC_REGISTER , // outCond
2249 pCodeInstruction pic16_pciSUBLW = {
2250 {PC_OPCODE, NULL, NULL, 0, NULL,
2257 NULL, // from branch
2264 0,0, // dest, bit instruction
2265 0,0, // branch, skip
2266 1, // literal operand
2267 0, // RAM access bit
2268 0, // fast call/return mode select bit
2269 0, // second memory operand
2270 0, // second literal operand
2272 (PCC_W | PCC_LITERAL), // inCond
2273 (PCC_W | PCC_STATUS), // outCond
2277 pCodeInstruction pic16_pciSUBFWB = {
2278 {PC_OPCODE, NULL, NULL, 0, NULL,
2285 NULL, // from branch
2292 1,0, // dest, bit instruction
2293 0,0, // branch, skip
2294 0, // literal operand
2295 1, // RAM access bit
2296 0, // fast call/return mode select bit
2297 0, // second memory operand
2298 0, // second literal operand
2300 (PCC_W | PCC_REGISTER | PCC_C), // inCond
2301 (PCC_W | PCC_STATUS), // outCond
2305 pCodeInstruction pic16_pciSUBWF = {
2306 {PC_OPCODE, NULL, NULL, 0, NULL,
2313 NULL, // from branch
2320 1,0, // dest, bit instruction
2321 0,0, // branch, skip
2322 0, // literal operand
2323 1, // RAM access bit
2324 0, // fast call/return mode select bit
2325 0, // second memory operand
2326 0, // second literal operand
2328 (PCC_W | PCC_REGISTER), // inCond
2329 (PCC_REGISTER | PCC_STATUS), // outCond
2333 pCodeInstruction pic16_pciSUBFW = {
2334 {PC_OPCODE, NULL, NULL, 0, NULL,
2341 NULL, // from branch
2348 0,0, // dest, bit instruction
2349 0,0, // branch, skip
2350 0, // literal operand
2351 1, // RAM access bit
2352 0, // fast call/return mode select bit
2353 0, // second memory operand
2354 0, // second literal operand
2356 (PCC_W | PCC_REGISTER), // inCond
2357 (PCC_W | PCC_STATUS), // outCond
2361 pCodeInstruction pic16_pciSUBFWB_D1 = { // mdubuc - New
2362 {PC_OPCODE, NULL, NULL, 0, NULL,
2369 NULL, // from branch
2376 1,0, // dest, bit instruction
2377 0,0, // branch, skip
2378 0, // literal operand
2379 1, // RAM access bit
2380 0, // fast call/return mode select bit
2381 0, // second memory operand
2382 0, // second literal operand
2384 (PCC_W | PCC_REGISTER | PCC_C), // inCond
2385 (PCC_REGISTER | PCC_STATUS), // outCond
2389 pCodeInstruction pic16_pciSUBFWB_D0 = { // mdubuc - New
2390 {PC_OPCODE, NULL, NULL, 0, NULL,
2397 NULL, // from branch
2404 0,0, // dest, bit instruction
2405 0,0, // branch, skip
2406 0, // literal operand
2407 1, // RAM access bit
2408 0, // fast call/return mode select bit
2409 0, // second memory operand
2410 0, // second literal operand
2412 (PCC_W | PCC_REGISTER | PCC_C), // inCond
2413 (PCC_W | PCC_STATUS), // outCond
2417 pCodeInstruction pic16_pciSUBWFB_D1 = { // mdubuc - New
2418 {PC_OPCODE, NULL, NULL, 0, NULL,
2425 NULL, // from branch
2432 1,0, // dest, bit instruction
2433 0,0, // branch, skip
2434 0, // literal operand
2435 1, // RAM access bit
2436 0, // fast call/return mode select bit
2437 0, // second memory operand
2438 0, // second literal operand
2440 (PCC_W | PCC_REGISTER | PCC_C), // inCond
2441 (PCC_REGISTER | PCC_STATUS), // outCond
2445 pCodeInstruction pic16_pciSUBWFB_D0 = { // mdubuc - New
2446 {PC_OPCODE, NULL, NULL, 0, NULL,
2453 NULL, // from branch
2460 0,0, // dest, bit instruction
2461 0,0, // branch, skip
2462 0, // literal operand
2463 1, // RAM access bit
2464 0, // fast call/return mode select bit
2465 0, // second memory operand
2466 0, // second literal operand
2468 (PCC_W | PCC_REGISTER | PCC_C), // inCond
2469 (PCC_W | PCC_STATUS), // outCond
2473 pCodeInstruction pic16_pciSWAPF = {
2474 {PC_OPCODE, NULL, NULL, 0, NULL,
2481 NULL, // from branch
2488 1,0, // dest, bit instruction
2489 0,0, // branch, skip
2490 0, // literal operand
2491 1, // RAM access bit
2492 0, // fast call/return mode select bit
2493 0, // second memory operand
2494 0, // second literal operand
2496 (PCC_REGISTER), // inCond
2497 (PCC_REGISTER), // outCond
2501 pCodeInstruction pic16_pciSWAPFW = {
2502 {PC_OPCODE, NULL, NULL, 0, NULL,
2509 NULL, // from branch
2516 0,0, // dest, bit instruction
2517 0,0, // branch, skip
2518 0, // literal operand
2519 1, // RAM access bit
2520 0, // fast call/return mode select bit
2521 0, // second memory operand
2522 0, // second literal operand
2524 (PCC_REGISTER), // inCond
2529 pCodeInstruction pic16_pciTBLRD = { // patch 15
2530 {PC_OPCODE, NULL, NULL, 0, NULL,
2536 NULL, // from branch
2543 0,0, // dest, bit instruction
2544 0,0, // branch, skip
2545 0, // literal operand
2546 0, // RAM access bit
2547 0, // fast call/return mode select bit
2548 0, // second memory operand
2549 0, // second literal operand
2552 PCC_NONE , // outCond
2556 pCodeInstruction pic16_pciTBLRD_POSTINC = { // patch 15
2557 {PC_OPCODE, NULL, NULL, 0, NULL,
2563 NULL, // from branch
2570 0,0, // dest, bit instruction
2571 0,0, // branch, skip
2572 0, // literal operand
2573 0, // RAM access bit
2574 0, // fast call/return mode select bit
2575 0, // second memory operand
2576 0, // second literal operand
2579 PCC_NONE , // outCond
2583 pCodeInstruction pic16_pciTBLRD_POSTDEC = { // patch 15
2584 {PC_OPCODE, NULL, NULL, 0, NULL,
2590 NULL, // from branch
2597 0,0, // dest, bit instruction
2598 0,0, // branch, skip
2599 0, // literal operand
2600 0, // RAM access bit
2601 0, // fast call/return mode select bit
2602 0, // second memory operand
2603 0, // second literal operand
2606 PCC_NONE , // outCond
2610 pCodeInstruction pic16_pciTBLRD_PREINC = { // patch 15
2611 {PC_OPCODE, NULL, NULL, 0, NULL,
2617 NULL, // from branch
2624 0,0, // dest, bit instruction
2625 0,0, // branch, skip
2626 0, // literal operand
2627 0, // RAM access bit
2628 0, // fast call/return mode select bit
2629 0, // second memory operand
2630 0, // second literal operand
2633 PCC_NONE , // outCond
2637 pCodeInstruction pic16_pciTBLWT = { // patch 15
2638 {PC_OPCODE, NULL, NULL, 0, NULL,
2644 NULL, // from branch
2651 0,0, // dest, bit instruction
2652 0,0, // branch, skip
2653 0, // literal operand
2654 0, // RAM access bit
2655 0, // fast call/return mode select bit
2656 0, // second memory operand
2657 0, // second literal operand
2660 PCC_NONE , // outCond
2664 pCodeInstruction pic16_pciTBLWT_POSTINC = { // patch 15
2665 {PC_OPCODE, NULL, NULL, 0, NULL,
2671 NULL, // from branch
2678 0,0, // dest, bit instruction
2679 0,0, // branch, skip
2680 0, // literal operand
2681 0, // RAM access bit
2682 0, // fast call/return mode select bit
2683 0, // second memory operand
2684 0, // second literal operand
2687 PCC_NONE , // outCond
2691 pCodeInstruction pic16_pciTBLWT_POSTDEC = { // patch 15
2692 {PC_OPCODE, NULL, NULL, 0, NULL,
2698 NULL, // from branch
2705 0,0, // dest, bit instruction
2706 0,0, // branch, skip
2707 0, // literal operand
2708 0, // RAM access bit
2709 0, // fast call/return mode select bit
2710 0, // second memory operand
2711 0, // second literal operand
2714 PCC_NONE , // outCond
2718 pCodeInstruction pic16_pciTBLWT_PREINC = { // patch 15
2719 {PC_OPCODE, NULL, NULL, 0, NULL,
2725 NULL, // from branch
2732 0,0, // dest, bit instruction
2733 0,0, // branch, skip
2734 0, // literal operand
2735 0, // RAM access bit
2736 0, // fast call/return mode select bit
2737 0, // second memory operand
2738 0, // second literal operand
2741 PCC_NONE , // outCond
2745 pCodeInstruction pic16_pciTSTFSZ = { // mdubuc - New
2746 {PC_OPCODE, NULL, NULL, 0, NULL,
2753 NULL, // from branch
2760 0,0, // dest, bit instruction
2761 1,1, // branch, skip
2762 0, // literal operand
2763 1, // RAM access bit
2764 0, // fast call/return mode select bit
2765 0, // second memory operand
2766 0, // second literal operand
2768 PCC_REGISTER, // inCond
2769 PCC_NONE, // outCond
2773 pCodeInstruction pic16_pciXORWF = {
2774 {PC_OPCODE, NULL, NULL, 0, NULL,
2781 NULL, // from branch
2788 1,0, // dest, bit instruction
2789 0,0, // branch, skip
2790 0, // literal operand
2791 1, // RAM access bit
2792 0, // fast call/return mode select bit
2793 0, // second memory operand
2794 0, // second literal operand
2796 (PCC_W | PCC_REGISTER), // inCond
2797 (PCC_REGISTER | PCC_Z | PCC_N), // outCond
2801 pCodeInstruction pic16_pciXORFW = {
2802 {PC_OPCODE, NULL, NULL, 0, NULL,
2809 NULL, // from branch
2816 0,0, // dest, bit instruction
2817 0,0, // branch, skip
2818 0, // literal operand
2819 1, // RAM access bit
2820 0, // fast call/return mode select bit
2821 0, // second memory operand
2822 0, // second literal operand
2824 (PCC_W | PCC_REGISTER), // inCond
2825 (PCC_W | PCC_Z | PCC_N), // outCond
2829 pCodeInstruction pic16_pciXORLW = {
2830 {PC_OPCODE, NULL, NULL, 0, NULL,
2837 NULL, // from branch
2844 0,0, // dest, bit instruction
2845 0,0, // branch, skip
2846 1, // literal operand
2847 1, // RAM access bit
2848 0, // fast call/return mode select bit
2849 0, // second memory operand
2850 0, // second literal operand
2852 (PCC_W | PCC_LITERAL), // inCond
2853 (PCC_W | PCC_Z | PCC_N), // outCond
2858 pCodeInstruction pic16_pciBANKSEL = {
2859 {PC_OPCODE, NULL, NULL, 0, NULL,
2865 NULL, // from branch
2872 0,0, // dest, bit instruction
2873 0,0, // branch, skip
2874 0, // literal operand
2875 0, // RAM access bit
2876 0, // fast call/return mode select bit
2877 0, // second memory operand
2878 0, // second literal operand
2881 PCC_NONE, // outCond
2886 #define MAX_PIC16MNEMONICS 100
2887 pCodeInstruction *pic16Mnemonics[MAX_PIC16MNEMONICS];
2889 //#define USE_VSNPRINTF
2892 #ifdef USE_VSNPRINTF
2893 // Alas, vsnprintf is not ANSI standard, and does not exist
2894 // on Solaris (and probably other non-Gnu flavored Unixes).
2896 /*-----------------------------------------------------------------*/
2897 /* SAFE_snprintf - like snprintf except the string pointer is */
2898 /* after the string has been printed to. This is */
2899 /* useful for printing to string as though if it */
2900 /* were a stream. */
2901 /*-----------------------------------------------------------------*/
2902 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
2910 va_start(val, format);
2912 vsnprintf(*str, *size, format, val);
2918 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
2919 fprintf(stderr,"len = %d is > str size %d\n",len,*size);
2928 // This version is *not* safe, despite the name.
2930 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
2934 static char buffer[1024]; /* grossly conservative, but still not inherently safe */
2939 va_start(val, format);
2941 vsprintf(buffer, format, val);
2944 len = strlen(buffer);
2946 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
2947 fprintf(stderr,"len = %d is > str size %d\n",len, (int) *size);
2950 strcpy(*str, buffer);
2956 #endif // USE_VSNPRINTF
2959 extern set *externs;
2960 extern void pic16_initStack(int base_address, int size);
2961 extern regs *pic16_allocProcessorRegister(int rIdx, char * name, short po_type, int alias);
2962 extern regs *pic16_allocInternalRegister(int rIdx, char * name, short po_type, int alias);
2963 extern void pic16_init_pic(char *);
2965 void pic16_pCodeInitRegisters(void)
2967 static int initialized=0;
2974 // pic16_initStack(0xfff, 8);
2975 pic16_init_pic(port->processor);
2977 pic16_pc_status.r = pic16_allocProcessorRegister(IDX_STATUS,"STATUS", PO_STATUS, 0x80);
2978 pic16_pc_pcl.r = pic16_allocProcessorRegister(IDX_PCL,"PCL", PO_PCL, 0x80);
2979 pic16_pc_pclath.r = pic16_allocProcessorRegister(IDX_PCLATH,"PCLATH", PO_PCLATH, 0x80);
2980 pic16_pc_pclatu.r = pic16_allocProcessorRegister(IDX_PCLATU,"PCLATU", PO_PCLATU, 0x80);
2981 pic16_pc_intcon.r = pic16_allocProcessorRegister(IDX_INTCON,"INTCON", PO_INTCON, 0x80);
2982 pic16_pc_wreg.r = pic16_allocProcessorRegister(IDX_WREG,"WREG", PO_WREG, 0x80);
2983 pic16_pc_bsr.r = pic16_allocProcessorRegister(IDX_BSR,"BSR", PO_BSR, 0x80);
2985 pic16_pc_tosl.r = pic16_allocProcessorRegister(IDX_TOSL,"TOSL", PO_SFR_REGISTER, 0x80);
2986 pic16_pc_tosh.r = pic16_allocProcessorRegister(IDX_TOSH,"TOSH", PO_SFR_REGISTER, 0x80);
2987 pic16_pc_tosu.r = pic16_allocProcessorRegister(IDX_TOSU,"TOSU", PO_SFR_REGISTER, 0x80);
2989 pic16_pc_tblptrl.r = pic16_allocProcessorRegister(IDX_TBLPTRL,"TBLPTRL", PO_SFR_REGISTER, 0x80);
2990 pic16_pc_tblptrh.r = pic16_allocProcessorRegister(IDX_TBLPTRH,"TBLPTRH", PO_SFR_REGISTER, 0x80);
2991 pic16_pc_tblptru.r = pic16_allocProcessorRegister(IDX_TBLPTRU,"TBLPTRU", PO_SFR_REGISTER, 0x80);
2992 pic16_pc_tablat.r = pic16_allocProcessorRegister(IDX_TABLAT,"TABLAT", PO_SFR_REGISTER, 0x80);
2994 pic16_pc_fsr0l.r = pic16_allocProcessorRegister(IDX_FSR0L, "FSR0L", PO_FSR0, 0x80);
2995 pic16_pc_fsr0h.r = pic16_allocProcessorRegister(IDX_FSR0H, "FSR0H", PO_FSR0, 0x80);
2996 pic16_pc_fsr1l.r = pic16_allocProcessorRegister(IDX_FSR1L, "FSR1L", PO_FSR0, 0x80);
2997 pic16_pc_fsr1h.r = pic16_allocProcessorRegister(IDX_FSR1H, "FSR1H", PO_FSR0, 0x80);
2998 pic16_pc_fsr2l.r = pic16_allocProcessorRegister(IDX_FSR2L, "FSR2L", PO_FSR0, 0x80);
2999 pic16_pc_fsr2h.r = pic16_allocProcessorRegister(IDX_FSR2H, "FSR2H", PO_FSR0, 0x80);
3001 pic16_stackpnt_lo = &pic16_pc_fsr1l;
3002 pic16_stackpnt_hi = &pic16_pc_fsr1h;
3003 pic16_stack_postdec = &pic16_pc_postdec1;
3004 pic16_stack_postinc = &pic16_pc_postinc1;
3005 pic16_stack_preinc = &pic16_pc_preinc1;
3006 pic16_stack_plusw = &pic16_pc_plusw1;
3008 pic16_framepnt_lo = &pic16_pc_fsr2l;
3009 pic16_framepnt_hi = &pic16_pc_fsr2h;
3010 pic16_frame_postdec = &pic16_pc_postdec2;
3011 pic16_frame_postinc = &pic16_pc_postinc2;
3012 pic16_frame_preinc = &pic16_pc_preinc2;
3013 pic16_frame_plusw = &pic16_pc_plusw2;
3015 pic16_pc_indf0.r = pic16_allocProcessorRegister(IDX_INDF0,"INDF0", PO_INDF0, 0x80);
3016 pic16_pc_postinc0.r = pic16_allocProcessorRegister(IDX_POSTINC0, "POSTINC0", PO_INDF0, 0x80);
3017 pic16_pc_postdec0.r = pic16_allocProcessorRegister(IDX_POSTDEC0, "POSTDEC0", PO_INDF0, 0x80);
3018 pic16_pc_preinc0.r = pic16_allocProcessorRegister(IDX_PREINC0, "PREINC0", PO_INDF0, 0x80);
3019 pic16_pc_plusw0.r = pic16_allocProcessorRegister(IDX_PLUSW0, "PLUSW0", PO_INDF0, 0x80);
3021 pic16_pc_indf1.r = pic16_allocProcessorRegister(IDX_INDF1,"INDF1", PO_INDF0, 0x80);
3022 pic16_pc_postinc1.r = pic16_allocProcessorRegister(IDX_POSTINC1, "POSTINC1", PO_INDF0, 0x80);
3023 pic16_pc_postdec1.r = pic16_allocProcessorRegister(IDX_POSTDEC1, "POSTDEC1", PO_INDF0, 0x80);
3024 pic16_pc_preinc1.r = pic16_allocProcessorRegister(IDX_PREINC1, "PREINC1", PO_INDF0, 0x80);
3025 pic16_pc_plusw1.r = pic16_allocProcessorRegister(IDX_PLUSW1, "PLUSW1", PO_INDF0, 0x80);
3027 pic16_pc_indf2.r = pic16_allocProcessorRegister(IDX_INDF2,"INDF2", PO_INDF0, 0x80);
3028 pic16_pc_postinc2.r = pic16_allocProcessorRegister(IDX_POSTINC2, "POSTINC2", PO_INDF0, 0x80);
3029 pic16_pc_postdec2.r = pic16_allocProcessorRegister(IDX_POSTDEC2, "POSTDEC2", PO_INDF0, 0x80);
3030 pic16_pc_preinc2.r = pic16_allocProcessorRegister(IDX_PREINC2, "PREINC2", PO_INDF0, 0x80);
3031 pic16_pc_plusw2.r = pic16_allocProcessorRegister(IDX_PLUSW2, "PLUSW2", PO_INDF0, 0x80);
3033 pic16_pc_prodl.r = pic16_allocProcessorRegister(IDX_PRODL, "PRODL", PO_PRODL, 0x80);
3034 pic16_pc_prodh.r = pic16_allocProcessorRegister(IDX_PRODH, "PRODH", PO_PRODH, 0x80);
3037 pic16_pc_eecon1.r = pic16_allocProcessorRegister(IDX_EECON1, "EECON1", PO_SFR_REGISTER, 0x80);
3038 pic16_pc_eecon2.r = pic16_allocProcessorRegister(IDX_EECON2, "EECON2", PO_SFR_REGISTER, 0x80);
3039 pic16_pc_eedata.r = pic16_allocProcessorRegister(IDX_EEDATA, "EEDATA", PO_SFR_REGISTER, 0x80);
3040 pic16_pc_eeadr.r = pic16_allocProcessorRegister(IDX_EEADR, "EEADR", PO_SFR_REGISTER, 0x80);
3043 pic16_pc_status.rIdx = IDX_STATUS;
3044 pic16_pc_intcon.rIdx = IDX_INTCON;
3045 pic16_pc_pcl.rIdx = IDX_PCL;
3046 pic16_pc_pclath.rIdx = IDX_PCLATH;
3047 pic16_pc_pclatu.rIdx = IDX_PCLATU;
3048 pic16_pc_wreg.rIdx = IDX_WREG;
3049 pic16_pc_bsr.rIdx = IDX_BSR;
3051 pic16_pc_tosl.rIdx = IDX_TOSL;
3052 pic16_pc_tosh.rIdx = IDX_TOSH;
3053 pic16_pc_tosu.rIdx = IDX_TOSU;
3055 pic16_pc_tblptrl.rIdx = IDX_TBLPTRL;
3056 pic16_pc_tblptrh.rIdx = IDX_TBLPTRH;
3057 pic16_pc_tblptru.rIdx = IDX_TBLPTRU;
3058 pic16_pc_tablat.rIdx = IDX_TABLAT;
3060 pic16_pc_fsr0l.rIdx = IDX_FSR0L;
3061 pic16_pc_fsr0h.rIdx = IDX_FSR0H;
3062 pic16_pc_fsr1l.rIdx = IDX_FSR1L;
3063 pic16_pc_fsr1h.rIdx = IDX_FSR1H;
3064 pic16_pc_fsr2l.rIdx = IDX_FSR2L;
3065 pic16_pc_fsr2h.rIdx = IDX_FSR2H;
3066 pic16_pc_indf0.rIdx = IDX_INDF0;
3067 pic16_pc_postinc0.rIdx = IDX_POSTINC0;
3068 pic16_pc_postdec0.rIdx = IDX_POSTDEC0;
3069 pic16_pc_preinc0.rIdx = IDX_PREINC0;
3070 pic16_pc_plusw0.rIdx = IDX_PLUSW0;
3071 pic16_pc_indf1.rIdx = IDX_INDF1;
3072 pic16_pc_postinc1.rIdx = IDX_POSTINC1;
3073 pic16_pc_postdec1.rIdx = IDX_POSTDEC1;
3074 pic16_pc_preinc1.rIdx = IDX_PREINC1;
3075 pic16_pc_plusw1.rIdx = IDX_PLUSW1;
3076 pic16_pc_indf2.rIdx = IDX_INDF2;
3077 pic16_pc_postinc2.rIdx = IDX_POSTINC2;
3078 pic16_pc_postdec2.rIdx = IDX_POSTDEC2;
3079 pic16_pc_preinc2.rIdx = IDX_PREINC2;
3080 pic16_pc_plusw2.rIdx = IDX_PLUSW2;
3081 pic16_pc_prodl.rIdx = IDX_PRODL;
3082 pic16_pc_prodh.rIdx = IDX_PRODH;
3084 pic16_pc_kzero.r = pic16_allocInternalRegister(IDX_KZ,"KZ",PO_GPR_REGISTER,0);
3085 pic16_pc_ssave.r = pic16_allocInternalRegister(IDX_SSAVE,"SSAVE", PO_GPR_REGISTER, 0);
3086 pic16_pc_wsave.r = pic16_allocInternalRegister(IDX_WSAVE,"WSAVE", PO_GPR_REGISTER, 0);
3088 pic16_pc_kzero.rIdx = IDX_KZ;
3089 pic16_pc_wsave.rIdx = IDX_WSAVE;
3090 pic16_pc_ssave.rIdx = IDX_SSAVE;
3092 pic16_pc_eecon1.rIdx = IDX_EECON1;
3093 pic16_pc_eecon2.rIdx = IDX_EECON2;
3094 pic16_pc_eedata.rIdx = IDX_EEDATA;
3095 pic16_pc_eeadr.rIdx = IDX_EEADR;
3098 pic16_pc_gpsimio.r = pic16_allocProcessorRegister(IDX_GPSIMIO, "GPSIMIO", PO_GPR_REGISTER, 0x80);
3099 pic16_pc_gpsimio2.r = pic16_allocProcessorRegister(IDX_GPSIMIO2, "GPSIMIO2", PO_GPR_REGISTER, 0x80);
3101 pic16_pc_gpsimio.rIdx = IDX_GPSIMIO;
3102 pic16_pc_gpsimio2.rIdx = IDX_GPSIMIO2;
3104 /* probably should put this in a separate initialization routine */
3105 pb_dead_pcodes = newpBlock();
3110 /*-----------------------------------------------------------------*/
3111 /* mnem2key - convert a pic mnemonic into a hash key */
3112 /* (BTW - this spreads the mnemonics quite well) */
3114 /*-----------------------------------------------------------------*/
3116 int mnem2key(char const *mnem)
3125 key += toupper(*mnem++) +1;
3129 return (key & 0x1f);
3134 void pic16initMnemonics(void)
3139 pCodeInstruction *pci;
3141 if(mnemonics_initialized)
3144 // NULL out the array before making the assignments
3145 // since we check the array contents below this initialization.
3147 for (i = 0; i < MAX_PIC16MNEMONICS; i++) {
3148 pic16Mnemonics[i] = NULL;
3151 pic16Mnemonics[POC_ADDLW] = &pic16_pciADDLW;
3152 pic16Mnemonics[POC_ADDWF] = &pic16_pciADDWF;
3153 pic16Mnemonics[POC_ADDFW] = &pic16_pciADDFW;
3154 pic16Mnemonics[POC_ADDWFC] = &pic16_pciADDWFC;
3155 pic16Mnemonics[POC_ADDFWC] = &pic16_pciADDFWC;
3156 pic16Mnemonics[POC_ANDLW] = &pic16_pciANDLW;
3157 pic16Mnemonics[POC_ANDWF] = &pic16_pciANDWF;
3158 pic16Mnemonics[POC_ANDFW] = &pic16_pciANDFW;
3159 pic16Mnemonics[POC_BC] = &pic16_pciBC;
3160 pic16Mnemonics[POC_BCF] = &pic16_pciBCF;
3161 pic16Mnemonics[POC_BN] = &pic16_pciBN;
3162 pic16Mnemonics[POC_BNC] = &pic16_pciBNC;
3163 pic16Mnemonics[POC_BNN] = &pic16_pciBNN;
3164 pic16Mnemonics[POC_BNOV] = &pic16_pciBNOV;
3165 pic16Mnemonics[POC_BNZ] = &pic16_pciBNZ;
3166 pic16Mnemonics[POC_BOV] = &pic16_pciBOV;
3167 pic16Mnemonics[POC_BRA] = &pic16_pciBRA;
3168 pic16Mnemonics[POC_BSF] = &pic16_pciBSF;
3169 pic16Mnemonics[POC_BTFSC] = &pic16_pciBTFSC;
3170 pic16Mnemonics[POC_BTFSS] = &pic16_pciBTFSS;
3171 pic16Mnemonics[POC_BTG] = &pic16_pciBTG;
3172 pic16Mnemonics[POC_BZ] = &pic16_pciBZ;
3173 pic16Mnemonics[POC_CALL] = &pic16_pciCALL;
3174 pic16Mnemonics[POC_CLRF] = &pic16_pciCLRF;
3175 pic16Mnemonics[POC_CLRWDT] = &pic16_pciCLRWDT;
3176 pic16Mnemonics[POC_COMF] = &pic16_pciCOMF;
3177 pic16Mnemonics[POC_COMFW] = &pic16_pciCOMFW;
3178 pic16Mnemonics[POC_CPFSEQ] = &pic16_pciCPFSEQ;
3179 pic16Mnemonics[POC_CPFSGT] = &pic16_pciCPFSGT;
3180 pic16Mnemonics[POC_CPFSLT] = &pic16_pciCPFSLT;
3181 pic16Mnemonics[POC_DAW] = &pic16_pciDAW;
3182 pic16Mnemonics[POC_DCFSNZ] = &pic16_pciDCFSNZ;
3183 pic16Mnemonics[POC_DECF] = &pic16_pciDECF;
3184 pic16Mnemonics[POC_DECFW] = &pic16_pciDECFW;
3185 pic16Mnemonics[POC_DECFSZ] = &pic16_pciDECFSZ;
3186 pic16Mnemonics[POC_DECFSZW] = &pic16_pciDECFSZW;
3187 pic16Mnemonics[POC_GOTO] = &pic16_pciGOTO;
3188 pic16Mnemonics[POC_INCF] = &pic16_pciINCF;
3189 pic16Mnemonics[POC_INCFW] = &pic16_pciINCFW;
3190 pic16Mnemonics[POC_INCFSZ] = &pic16_pciINCFSZ;
3191 pic16Mnemonics[POC_INCFSZW] = &pic16_pciINCFSZW;
3192 pic16Mnemonics[POC_INFSNZ] = &pic16_pciINFSNZ;
3193 pic16Mnemonics[POC_INFSNZW] = &pic16_pciINFSNZW;
3194 pic16Mnemonics[POC_IORWF] = &pic16_pciIORWF;
3195 pic16Mnemonics[POC_IORFW] = &pic16_pciIORFW;
3196 pic16Mnemonics[POC_IORLW] = &pic16_pciIORLW;
3197 pic16Mnemonics[POC_LFSR] = &pic16_pciLFSR;
3198 pic16Mnemonics[POC_MOVF] = &pic16_pciMOVF;
3199 pic16Mnemonics[POC_MOVFW] = &pic16_pciMOVFW;
3200 pic16Mnemonics[POC_MOVFF] = &pic16_pciMOVFF;
3201 pic16Mnemonics[POC_MOVLB] = &pic16_pciMOVLB;
3202 pic16Mnemonics[POC_MOVLW] = &pic16_pciMOVLW;
3203 pic16Mnemonics[POC_MOVWF] = &pic16_pciMOVWF;
3204 pic16Mnemonics[POC_MULLW] = &pic16_pciMULLW;
3205 pic16Mnemonics[POC_MULWF] = &pic16_pciMULWF;
3206 pic16Mnemonics[POC_NEGF] = &pic16_pciNEGF;
3207 pic16Mnemonics[POC_NOP] = &pic16_pciNOP;
3208 pic16Mnemonics[POC_POP] = &pic16_pciPOP;
3209 pic16Mnemonics[POC_PUSH] = &pic16_pciPUSH;
3210 pic16Mnemonics[POC_RCALL] = &pic16_pciRCALL;
3211 pic16Mnemonics[POC_RETFIE] = &pic16_pciRETFIE;
3212 pic16Mnemonics[POC_RETLW] = &pic16_pciRETLW;
3213 pic16Mnemonics[POC_RETURN] = &pic16_pciRETURN;
3214 pic16Mnemonics[POC_RLCF] = &pic16_pciRLCF;
3215 pic16Mnemonics[POC_RLCFW] = &pic16_pciRLCFW;
3216 pic16Mnemonics[POC_RLNCF] = &pic16_pciRLNCF;
3217 pic16Mnemonics[POC_RLNCFW] = &pic16_pciRLNCFW;
3218 pic16Mnemonics[POC_RRCF] = &pic16_pciRRCF;
3219 pic16Mnemonics[POC_RRCFW] = &pic16_pciRRCFW;
3220 pic16Mnemonics[POC_RRNCF] = &pic16_pciRRNCF;
3221 pic16Mnemonics[POC_RRNCFW] = &pic16_pciRRNCFW;
3222 pic16Mnemonics[POC_SETF] = &pic16_pciSETF;
3223 pic16Mnemonics[POC_SUBLW] = &pic16_pciSUBLW;
3224 pic16Mnemonics[POC_SUBWF] = &pic16_pciSUBWF;
3225 pic16Mnemonics[POC_SUBFW] = &pic16_pciSUBFW;
3226 pic16Mnemonics[POC_SUBWFB_D0] = &pic16_pciSUBWFB_D0;
3227 pic16Mnemonics[POC_SUBWFB_D1] = &pic16_pciSUBWFB_D1;
3228 pic16Mnemonics[POC_SUBFWB_D0] = &pic16_pciSUBFWB_D0;
3229 pic16Mnemonics[POC_SUBFWB_D1] = &pic16_pciSUBFWB_D1;
3230 pic16Mnemonics[POC_SWAPF] = &pic16_pciSWAPF;
3231 pic16Mnemonics[POC_SWAPFW] = &pic16_pciSWAPFW;
3232 pic16Mnemonics[POC_TBLRD] = &pic16_pciTBLRD;
3233 pic16Mnemonics[POC_TBLRD_POSTINC] = &pic16_pciTBLRD_POSTINC;
3234 pic16Mnemonics[POC_TBLRD_POSTDEC] = &pic16_pciTBLRD_POSTDEC;
3235 pic16Mnemonics[POC_TBLRD_PREINC] = &pic16_pciTBLRD_PREINC;
3236 pic16Mnemonics[POC_TBLWT] = &pic16_pciTBLWT;
3237 pic16Mnemonics[POC_TBLWT_POSTINC] = &pic16_pciTBLWT_POSTINC;
3238 pic16Mnemonics[POC_TBLWT_POSTDEC] = &pic16_pciTBLWT_POSTDEC;
3239 pic16Mnemonics[POC_TBLWT_PREINC] = &pic16_pciTBLWT_PREINC;
3240 pic16Mnemonics[POC_TSTFSZ] = &pic16_pciTSTFSZ;
3241 pic16Mnemonics[POC_XORLW] = &pic16_pciXORLW;
3242 pic16Mnemonics[POC_XORWF] = &pic16_pciXORWF;
3243 pic16Mnemonics[POC_XORFW] = &pic16_pciXORFW;
3244 pic16Mnemonics[POC_BANKSEL] = &pic16_pciBANKSEL;
3246 for(i=0; i<MAX_PIC16MNEMONICS; i++)
3247 if(pic16Mnemonics[i])
3248 hTabAddItem(&pic16MnemonicsHash, mnem2key(pic16Mnemonics[i]->mnemonic), pic16Mnemonics[i]);
3249 pci = hTabFirstItem(pic16MnemonicsHash, &key);
3252 DFPRINTF((stderr, "element %d key %d, mnem %s\n",i++,key,pci->mnemonic));
3253 pci = hTabNextItem(pic16MnemonicsHash, &key);
3256 mnemonics_initialized = 1;
3259 int pic16_getpCodePeepCommand(char *cmd);
3261 int pic16_getpCode(char *mnem,unsigned dest)
3264 pCodeInstruction *pci;
3265 int key = mnem2key(mnem);
3267 if(!mnemonics_initialized)
3268 pic16initMnemonics();
3270 pci = hTabFirstItemWK(pic16MnemonicsHash, key);
3274 if(STRCASECMP(pci->mnemonic, mnem) == 0) {
3275 if((pci->num_ops <= 1)
3276 || (pci->isModReg == dest)
3278 || (pci->num_ops <= 2 && pci->isAccess)
3279 || (pci->num_ops <= 2 && pci->isFastCall)
3280 || (pci->num_ops <= 2 && pci->is2MemOp)
3281 || (pci->num_ops <= 2 && pci->is2LitOp) )
3285 pci = hTabNextItemWK (pic16MnemonicsHash);
3292 /*-----------------------------------------------------------------*
3293 * pic16initpCodePeepCommands
3295 *-----------------------------------------------------------------*/
3296 void pic16initpCodePeepCommands(void)
3304 hTabAddItem(&pic16pCodePeepCommandsHash,
3305 mnem2key(peepCommands[i].cmd), &peepCommands[i]);
3307 } while (peepCommands[i].cmd);
3309 pcmd = hTabFirstItem(pic16pCodePeepCommandsHash, &key);
3312 //fprintf(stderr, "peep command %s key %d\n",pcmd->cmd,pcmd->id);
3313 pcmd = hTabNextItem(pic16pCodePeepCommandsHash, &key);
3318 /*-----------------------------------------------------------------
3321 *-----------------------------------------------------------------*/
3323 int pic16_getpCodePeepCommand(char *cmd)
3327 int key = mnem2key(cmd);
3330 pcmd = hTabFirstItemWK(pic16pCodePeepCommandsHash, key);
3333 // fprintf(stderr," comparing %s to %s\n",pcmd->cmd,cmd);
3334 if(STRCASECMP(pcmd->cmd, cmd) == 0) {
3338 pcmd = hTabNextItemWK (pic16pCodePeepCommandsHash);
3345 static char getpBlock_dbName(pBlock *pb)
3351 return pb->cmemmap->dbName;
3355 void pic16_pBlockConvert2ISR(pBlock *pb)
3359 if(pb->cmemmap)pb->cmemmap = NULL;
3363 if(pic16_pcode_verbose)
3364 fprintf(stderr, "%s:%d converting to 'I'interrupt pBlock\n", __FILE__, __LINE__);
3367 void pic16_pBlockConvert2Absolute(pBlock *pb)
3370 if(pb->cmemmap)pb->cmemmap = NULL;
3374 if(pic16_pcode_verbose)
3375 fprintf(stderr, "%s:%d converting to 'A'bsolute pBlock\n", __FILE__, __LINE__);
3378 /*-----------------------------------------------------------------*/
3379 /* pic16_movepBlock2Head - given the dbname of a pBlock, move all */
3380 /* instances to the front of the doubly linked */
3381 /* list of pBlocks */
3382 /*-----------------------------------------------------------------*/
3384 void pic16_movepBlock2Head(char dbName)
3389 /* this can happen in sources without code,
3390 * only variable definitions */
3391 if(!the_pFile)return;
3393 pb = the_pFile->pbHead;
3397 if(getpBlock_dbName(pb) == dbName) {
3398 pBlock *pbn = pb->next;
3399 pb->next = the_pFile->pbHead;
3400 the_pFile->pbHead->prev = pb;
3401 the_pFile->pbHead = pb;
3404 pb->prev->next = pbn;
3406 // If the pBlock that we just moved was the last
3407 // one in the link of all of the pBlocks, then we
3408 // need to point the tail to the block just before
3409 // the one we moved.
3410 // Note: if pb->next is NULL, then pb must have
3411 // been the last pBlock in the chain.
3414 pbn->prev = pb->prev;
3416 the_pFile->pbTail = pb->prev;
3427 void pic16_copypCode(FILE *of, char dbName)
3431 if(!of || !the_pFile)
3434 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3435 if(getpBlock_dbName(pb) == dbName) {
3436 // fprintf(stderr, "%s:%d: output of pb= 0x%p\n", __FILE__, __LINE__, pb);
3438 pic16_printpBlock(of,pb);
3443 void pic16_pcode_test(void)
3446 DFPRINTF((stderr,"pcode is alive!\n"));
3456 /* create the file name */
3457 strcpy(buffer,dstFileName);
3458 strcat(buffer,".p");
3460 if( !(pFile = fopen(buffer, "w" ))) {
3461 werror(E_FILE_OPEN_ERR,buffer);
3465 fprintf(pFile,"pcode dump\n\n");
3467 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3468 fprintf(pFile,"\n\tNew pBlock\n\n");
3470 fprintf(pFile,"%s",pb->cmemmap->sname);
3472 fprintf(pFile,"internal pblock");
3474 fprintf(pFile,", dbName =%c\n",getpBlock_dbName(pb));
3475 pic16_printpBlock(pFile,pb);
3481 unsigned long pic16_countInstructions(void)
3485 unsigned long isize=0;
3487 if(!the_pFile)return -1;
3489 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3490 for(pc = pb->pcHead; pc; pc = pc->next) {
3491 if(isPCI(pc) || isPCAD(pc))isize += PCI(pc)->isize;
3498 /*-----------------------------------------------------------------*/
3499 /* int RegCond(pCodeOp *pcop) - if pcop points to the STATUS reg- */
3500 /* ister, RegCond will return the bit being referenced. */
3502 /* fixme - why not just OR in the pcop bit field */
3503 /*-----------------------------------------------------------------*/
3505 static int RegCond(pCodeOp *pcop)
3511 if(!pcop->name)return 0;
3513 if(pcop->type == PO_GPR_BIT && !strcmp(pcop->name, pic16_pc_status.pcop.name)) {
3514 switch(PCORB(pcop)->bit) {
3528 /*-----------------------------------------------------------------*/
3529 /* pic16_newpCode - create and return a newly initialized pCode */
3531 /* fixme - rename this */
3533 /* The purpose of this routine is to create a new Instruction */
3534 /* pCode. This is called by gen.c while the assembly code is being */
3538 /* PIC_OPCODE op - the assembly instruction we wish to create. */
3539 /* (note that the op is analogous to but not the */
3540 /* same thing as the opcode of the instruction.) */
3541 /* pCdoeOp *pcop - pointer to the operand of the instruction. */
3544 /* a pointer to the new malloc'd pCode is returned. */
3548 /*-----------------------------------------------------------------*/
3549 pCode *pic16_newpCode (PIC_OPCODE op, pCodeOp *pcop)
3551 pCodeInstruction *pci ;
3553 if(!mnemonics_initialized)
3554 pic16initMnemonics();
3556 pci = Safe_calloc(1, sizeof(pCodeInstruction));
3558 if((op>=0) && (op < MAX_PIC16MNEMONICS) && pic16Mnemonics[op]) {
3559 memcpy(pci, pic16Mnemonics[op], sizeof(pCodeInstruction));
3562 if(pci->inCond & PCC_EXAMINE_PCOP)
3563 pci->inCond |= RegCond(pcop);
3565 if(pci->outCond & PCC_EXAMINE_PCOP)
3566 pci->outCond |= RegCond(pcop);
3568 pci->pc.prev = pci->pc.next = NULL;
3569 return (pCode *)pci;
3572 fprintf(stderr, "pCode mnemonic error %s,%d\n",__FUNCTION__,__LINE__);
3578 /*-----------------------------------------------------------------*/
3579 /* pic16_newpCodeWild - create a "wild" as in wild card pCode */
3581 /* Wild pcodes are used during the peep hole optimizer to serve */
3582 /* as place holders for any instruction. When a snippet of code is */
3583 /* compared to a peep hole rule, the wild card opcode will match */
3584 /* any instruction. However, the optional operand and label are */
3585 /* additional qualifiers that must also be matched before the */
3586 /* line (of assembly code) is declared matched. Note that the */
3587 /* operand may be wild too. */
3589 /* Note, a wild instruction is specified just like a wild var: */
3590 /* %4 ; A wild instruction, */
3591 /* See the peeph.def file for additional examples */
3593 /*-----------------------------------------------------------------*/
3595 pCode *pic16_newpCodeWild(int pCodeID, pCodeOp *optional_operand, pCodeOp *optional_label)
3600 pcw = Safe_calloc(1,sizeof(pCodeWild));
3602 pcw->pci.pc.type = PC_WILD;
3603 pcw->pci.pc.prev = pcw->pci.pc.next = NULL;
3604 pcw->pci.from = pcw->pci.to = pcw->pci.label = NULL;
3605 pcw->pci.pc.pb = NULL;
3607 // pcw->pci.pc.analyze = genericAnalyze;
3608 pcw->pci.pc.destruct = genericDestruct;
3609 pcw->pci.pc.print = genericPrint;
3611 pcw->id = pCodeID; // this is the 'n' in %n
3612 pcw->operand = optional_operand;
3613 pcw->label = optional_label;
3615 pcw->mustBeBitSkipInst = 0;
3616 pcw->mustNotBeBitSkipInst = 0;
3617 pcw->invertBitSkipInst = 0;
3619 return ( (pCode *)pcw);
3623 /*-----------------------------------------------------------------*/
3624 /* newPcodeInlineP - create a new pCode from a char string */
3625 /*-----------------------------------------------------------------*/
3628 pCode *pic16_newpCodeInlineP(char *cP)
3633 pcc = Safe_calloc(1,sizeof(pCodeComment));
3635 pcc->pc.type = PC_INLINE;
3636 pcc->pc.prev = pcc->pc.next = NULL;
3637 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
3640 // pcc->pc.analyze = genericAnalyze;
3641 pcc->pc.destruct = genericDestruct;
3642 pcc->pc.print = genericPrint;
3645 pcc->comment = Safe_strdup(cP);
3647 pcc->comment = NULL;
3649 return ( (pCode *)pcc);
3653 /*-----------------------------------------------------------------*/
3654 /* newPcodeCharP - create a new pCode from a char string */
3655 /*-----------------------------------------------------------------*/
3657 pCode *pic16_newpCodeCharP(char *cP)
3662 pcc = Safe_calloc(1,sizeof(pCodeComment));
3664 pcc->pc.type = PC_COMMENT;
3665 pcc->pc.prev = pcc->pc.next = NULL;
3666 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
3669 // pcc->pc.analyze = genericAnalyze;
3670 pcc->pc.destruct = genericDestruct;
3671 pcc->pc.print = genericPrint;
3674 pcc->comment = Safe_strdup(cP);
3676 pcc->comment = NULL;
3678 return ( (pCode *)pcc);
3682 /*-----------------------------------------------------------------*/
3683 /* pic16_newpCodeFunction - */
3684 /*-----------------------------------------------------------------*/
3687 pCode *pic16_newpCodeFunction(char *mod,char *f)
3691 pcf = Safe_calloc(1,sizeof(pCodeFunction));
3693 pcf->pc.type = PC_FUNCTION;
3694 pcf->pc.prev = pcf->pc.next = NULL;
3695 //pcf->pc.from = pcf->pc.to = pcf->pc.label = NULL;
3698 // pcf->pc.analyze = genericAnalyze;
3699 pcf->pc.destruct = genericDestruct;
3700 pcf->pc.print = pCodePrintFunction;
3706 pcf->modname = Safe_calloc(1,strlen(mod)+1);
3707 strcpy(pcf->modname,mod);
3709 pcf->modname = NULL;
3712 pcf->fname = Safe_calloc(1,strlen(f)+1);
3713 strcpy(pcf->fname,f);
3717 pcf->stackusage = 0;
3719 return ( (pCode *)pcf);
3722 /*-----------------------------------------------------------------*/
3723 /* pic16_newpCodeFlow */
3724 /*-----------------------------------------------------------------*/
3725 static void destructpCodeFlow(pCode *pc)
3727 if(!pc || !isPCFL(pc))
3734 pic16_unlinkpCode(pc);
3736 deleteSet(&PCFL(pc)->registers);
3737 deleteSet(&PCFL(pc)->from);
3738 deleteSet(&PCFL(pc)->to);
3740 /* Instead of deleting the memory used by this pCode, mark
3741 * the object as bad so that if there's a pointer to this pCode
3742 * dangling around somewhere then (hopefully) when the type is
3743 * checked we'll catch it.
3747 pic16_addpCode2pBlock(pb_dead_pcodes, pc);
3753 pCode *pic16_newpCodeFlow(void )
3757 //_ALLOC(pcflow,sizeof(pCodeFlow));
3758 pcflow = Safe_calloc(1,sizeof(pCodeFlow));
3760 pcflow->pc.type = PC_FLOW;
3761 pcflow->pc.prev = pcflow->pc.next = NULL;
3762 pcflow->pc.pb = NULL;
3764 // pcflow->pc.analyze = genericAnalyze;
3765 pcflow->pc.destruct = destructpCodeFlow;
3766 pcflow->pc.print = genericPrint;
3768 pcflow->pc.seq = GpcFlowSeq++;
3770 pcflow->from = pcflow->to = NULL;
3772 pcflow->inCond = PCC_NONE;
3773 pcflow->outCond = PCC_NONE;
3775 pcflow->firstBank = -1;
3776 pcflow->lastBank = -1;
3778 pcflow->FromConflicts = 0;
3779 pcflow->ToConflicts = 0;
3783 pcflow->registers = newSet();
3785 return ( (pCode *)pcflow);
3789 /*-----------------------------------------------------------------*/
3790 /*-----------------------------------------------------------------*/
3791 pCodeFlowLink *pic16_newpCodeFlowLink(pCodeFlow *pcflow)
3793 pCodeFlowLink *pcflowLink;
3795 pcflowLink = Safe_calloc(1,sizeof(pCodeFlowLink));
3797 pcflowLink->pcflow = pcflow;
3798 pcflowLink->bank_conflict = 0;
3803 /*-----------------------------------------------------------------*/
3804 /* pic16_newpCodeCSource - create a new pCode Source Symbol */
3805 /*-----------------------------------------------------------------*/
3807 pCode *pic16_newpCodeCSource(int ln, char *f, char *l)
3812 pccs = Safe_calloc(1,sizeof(pCodeCSource));
3814 pccs->pc.type = PC_CSOURCE;
3815 pccs->pc.prev = pccs->pc.next = NULL;
3818 pccs->pc.destruct = genericDestruct;
3819 pccs->pc.print = genericPrint;
3821 pccs->line_number = ln;
3823 pccs->line = Safe_strdup(l);
3828 pccs->file_name = Safe_strdup(f);
3830 pccs->file_name = NULL;
3832 return ( (pCode *)pccs);
3837 /*******************************************************************/
3838 /* pic16_newpCodeAsmDir - create a new pCode Assembler Directive */
3839 /* added by VR 6-Jun-2003 */
3840 /*******************************************************************/
3842 pCode *pic16_newpCodeAsmDir(char *asdir, char *argfmt, ...)
3849 pcad = Safe_calloc(1, sizeof(pCodeAsmDir));
3850 pcad->pci.pc.type = PC_ASMDIR;
3851 pcad->pci.pc.prev = pcad->pci.pc.next = NULL;
3852 pcad->pci.pc.pb = NULL;
3853 pcad->pci.isize = 2;
3854 pcad->pci.pc.destruct = genericDestruct;
3855 pcad->pci.pc.print = genericPrint;
3857 if(asdir && *asdir) {
3859 while(isspace(*asdir))asdir++; // strip any white space from the beginning
3861 pcad->directive = Safe_strdup( asdir );
3864 va_start(ap, argfmt);
3866 memset(buffer, 0, sizeof(buffer));
3867 if(argfmt && *argfmt)
3868 vsprintf(buffer, argfmt, ap);
3872 while(isspace(*lbp))lbp++;
3875 pcad->arg = Safe_strdup( lbp );
3877 return ((pCode *)pcad);
3880 /*-----------------------------------------------------------------*/
3881 /* pCodeLabelDestruct - free memory used by a label. */
3882 /*-----------------------------------------------------------------*/
3883 static void pCodeLabelDestruct(pCode *pc)
3889 // if((pc->type == PC_LABEL) && PCL(pc)->label)
3890 // Safe_free(PCL(pc)->label);
3892 /* Instead of deleting the memory used by this pCode, mark
3893 * the object as bad so that if there's a pointer to this pCode
3894 * dangling around somewhere then (hopefully) when the type is
3895 * checked we'll catch it.
3899 pic16_addpCode2pBlock(pb_dead_pcodes, pc);
3905 pCode *pic16_newpCodeLabel(char *name, int key)
3911 pcl = Safe_calloc(1,sizeof(pCodeLabel) );
3913 pcl->pc.type = PC_LABEL;
3914 pcl->pc.prev = pcl->pc.next = NULL;
3915 //pcl->pc.from = pcl->pc.to = pcl->pc.label = NULL;
3918 // pcl->pc.analyze = genericAnalyze;
3919 pcl->pc.destruct = pCodeLabelDestruct;
3920 pcl->pc.print = pCodePrintLabel;
3927 sprintf(s,"_%05d_DS_",key);
3932 pcl->label = Safe_strdup(s);
3934 // if(pic16_pcode_verbose)
3935 // fprintf(stderr, "%s:%d label name: %s\n", __FILE__, __LINE__, pcl->label);
3938 return ( (pCode *)pcl);
3942 pCode *pic16_newpCodeLabelFORCE(char *name, int key)
3944 pCodeLabel *pcl = (pCodeLabel *)pic16_newpCodeLabel(name, key);
3948 return ( (pCode *)pcl );
3951 pCode *pic16_newpCodeInfo(INFO_TYPE type, pCodeOp *pcop)
3955 pci = Safe_calloc(1, sizeof(pCodeInfo));
3956 pci->pci.pc.type = PC_INFO;
3957 pci->pci.pc.prev = pci->pci.pc.next = NULL;
3958 pci->pci.pc.pb = NULL;
3959 pci->pci.label = NULL;
3961 pci->pci.pc.destruct = genericDestruct;
3962 pci->pci.pc.print = genericPrint;
3967 return ((pCode *)pci);
3971 /*-----------------------------------------------------------------*/
3972 /* newpBlock - create and return a pointer to a new pBlock */
3973 /*-----------------------------------------------------------------*/
3974 static pBlock *newpBlock(void)
3979 PpB = Safe_calloc(1,sizeof(pBlock) );
3980 PpB->next = PpB->prev = NULL;
3982 PpB->function_entries = PpB->function_exits = PpB->function_calls = NULL;
3983 PpB->tregisters = NULL;
3985 PpB->FlowTree = NULL;
3991 /*-----------------------------------------------------------------*/
3992 /* pic16_newpCodeChain - create a new chain of pCodes */
3993 /*-----------------------------------------------------------------*
3995 * This function will create a new pBlock and the pointer to the
3996 * pCode that is passed in will be the first pCode in the block.
3997 *-----------------------------------------------------------------*/
4000 pBlock *pic16_newpCodeChain(memmap *cm,char c, pCode *pc)
4003 pBlock *pB = newpBlock();
4005 pB->pcHead = pB->pcTail = pc;
4014 /*-----------------------------------------------------------------*/
4015 /* pic16_newpCodeOpLabel - Create a new label given the key */
4016 /* Note, a negative key means that the label is part of wild card */
4017 /* (and hence a wild card label) used in the pCodePeep */
4018 /* optimizations). */
4019 /*-----------------------------------------------------------------*/
4021 pCodeOp *pic16_newpCodeOpLabel(char *name, int key)
4024 static int label_key=-1;
4028 pcop = Safe_calloc(1,sizeof(pCodeOpLabel) );
4029 pcop->type = PO_LABEL;
4034 sprintf(s=buffer,"_%05d_DS_",key);
4036 s = name, key = label_key--;
4039 pcop->name = Safe_strdup(s);
4041 ((pCodeOpLabel *)pcop)->key = key;
4043 //fprintf(stderr,"pic16_newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
4047 /*-----------------------------------------------------------------*/
4048 /*-----------------------------------------------------------------*/
4049 pCodeOp *pic16_newpCodeOpLit(int lit)
4055 pcop = Safe_calloc(1,sizeof(pCodeOpLit) );
4056 pcop->type = PO_LITERAL;
4060 sprintf(s,"0x%02hhx", (unsigned char)lit);
4062 // sprintf(s, "%i", lit);
4065 pcop->name = Safe_strdup(s);
4067 ((pCodeOpLit *)pcop)->lit = lit;
4072 /*-----------------------------------------------------------------*/
4073 /*-----------------------------------------------------------------*/
4074 pCodeOp *pic16_newpCodeOpLit2(int lit, pCodeOp *arg2)
4076 char *s = buffer, tbuf[256], *tb=tbuf;
4080 tb = pic16_get_op(arg2, NULL, 0);
4081 pcop = Safe_calloc(1,sizeof(pCodeOpLit2) );
4082 pcop->type = PO_LITERAL;
4086 sprintf(s,"0x%02x, %s", (unsigned char)lit, tb);
4088 pcop->name = Safe_strdup(s);
4091 ((pCodeOpLit2 *)pcop)->lit = lit;
4092 ((pCodeOpLit2 *)pcop)->arg2 = arg2;
4097 /*-----------------------------------------------------------------*/
4098 /*-----------------------------------------------------------------*/
4099 pCodeOp *pic16_newpCodeOpImmd(char *name, int offset, int index, int code_space)
4103 pcop = Safe_calloc(1,sizeof(pCodeOpImmd) );
4104 pcop->type = PO_IMMEDIATE;
4106 regs *r = pic16_dirregWithName(name);
4107 pcop->name = Safe_strdup(name);
4111 // fprintf(stderr, "%s:%d %s reg %s exists (r: %p)\n",__FILE__, __LINE__, __FUNCTION__, name, r);
4112 PCOI(pcop)->rIdx = r->rIdx;
4114 // fprintf(stderr, "%s:%d %s reg %s doesn't exist\n", __FILE__, __LINE__, __FUNCTION__, name);
4115 PCOI(pcop)->rIdx = -1;
4117 // fprintf(stderr,"%s %s %d\n",__FUNCTION__,name,offset);
4122 PCOI(pcop)->index = index;
4123 PCOI(pcop)->offset = offset;
4124 PCOI(pcop)->_const = code_space;
4129 /*-----------------------------------------------------------------*/
4130 /*-----------------------------------------------------------------*/
4131 pCodeOp *pic16_newpCodeOpWild(int id, pCodeWildBlock *pcwb, pCodeOp *subtype)
4137 if(!pcwb || !subtype) {
4138 fprintf(stderr, "Wild opcode declaration error: %s-%d\n",__FILE__,__LINE__);
4142 pcop = Safe_calloc(1,sizeof(pCodeOpWild));
4143 pcop->type = PO_WILD;
4144 sprintf(s,"%%%d",id);
4145 pcop->name = Safe_strdup(s);
4147 PCOW(pcop)->id = id;
4148 PCOW(pcop)->pcwb = pcwb;
4149 PCOW(pcop)->subtype = subtype;
4150 PCOW(pcop)->matched = NULL;
4152 PCOW(pcop)->pcop2 = NULL;
4157 /*-----------------------------------------------------------------*/
4158 /*-----------------------------------------------------------------*/
4159 pCodeOp *pic16_newpCodeOpWild2(int id, int id2, pCodeWildBlock *pcwb, pCodeOp *subtype, pCodeOp *subtype2)
4165 if(!pcwb || !subtype || !subtype2) {
4166 fprintf(stderr, "Wild opcode declaration error: %s-%d\n",__FILE__,__LINE__);
4170 pcop = Safe_calloc(1,sizeof(pCodeOpWild));
4171 pcop->type = PO_WILD;
4172 sprintf(s,"%%%d",id);
4173 pcop->name = Safe_strdup(s);
4175 PCOW(pcop)->id = id;
4176 PCOW(pcop)->pcwb = pcwb;
4177 PCOW(pcop)->subtype = subtype;
4178 PCOW(pcop)->matched = NULL;
4180 PCOW(pcop)->pcop2 = Safe_calloc(1, sizeof(pCodeOpWild));
4182 if(!subtype2->name) {
4183 PCOW(pcop)->pcop2 = Safe_calloc(1, sizeof(pCodeOpWild));
4184 PCOW2(pcop)->pcop.type = PO_WILD;
4185 sprintf(s, "%%%d", id2);
4186 PCOW2(pcop)->pcop.name = Safe_strdup(s);
4187 PCOW2(pcop)->id = id2;
4188 PCOW2(pcop)->subtype = subtype2;
4190 // fprintf(stderr, "%s:%d %s [wild,wild] for name: %s (%d)\tname2: %s (%d)\n", __FILE__, __LINE__, __FUNCTION__,
4191 // pcop->name, id, PCOW2(pcop)->pcop.name, id2);
4193 PCOW2(pcop)->pcop2 = pic16_pCodeOpCopy( subtype2 );
4195 // fprintf(stderr, "%s:%d %s [wild,str] for name: %s (%d)\tname2: %s (%d)\n", __FILE__, __LINE__, __FUNCTION__,
4196 // pcop->name, id, PCOW2(pcop)->pcop.name, id2);
4205 /*-----------------------------------------------------------------*/
4206 /*-----------------------------------------------------------------*/
4207 pCodeOp *pic16_newpCodeOpBit(char *s, int bit, int inBitSpace, PIC_OPTYPE subt)
4211 pcop = Safe_calloc(1,sizeof(pCodeOpRegBit) );
4212 pcop->type = PO_GPR_BIT;
4214 pcop->name = Safe_strdup(s);
4218 PCORB(pcop)->bit = bit;
4219 PCORB(pcop)->inBitSpace = inBitSpace;
4220 PCORB(pcop)->subtype = subt;
4222 /* pCodeOpBit is derived from pCodeOpReg. We need to init this too */
4223 PCOR(pcop)->r = pic16_regWithName(s); //NULL;
4224 // fprintf(stderr, "%s:%d %s for reg: %s\treg= %p\n", __FILE__, __LINE__, __FUNCTION__, s, PCOR(pcop)->r);
4225 // PCOR(pcop)->rIdx = 0;
4229 pCodeOp *pic16_newpCodeOpBit_simple (struct asmop *op, int offs, int bit)
4231 return pic16_newpCodeOpBit (pic16_aopGet(op,offs,FALSE,FALSE),
4232 bit, 0, PO_GPR_REGISTER);
4236 /*-----------------------------------------------------------------*
4237 * pCodeOp *pic16_newpCodeOpReg(int rIdx) - allocate a new register
4239 * If rIdx >=0 then a specific register from the set of registers
4240 * will be selected. If rIdx <0, then a new register will be searched
4242 *-----------------------------------------------------------------*/
4244 pCodeOp *pic16_newpCodeOpReg(int rIdx)
4248 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
4253 PCOR(pcop)->rIdx = rIdx;
4254 PCOR(pcop)->r = pic16_regWithIdx(rIdx);
4256 PCOR(pcop)->r = pic16_findFreeReg(REG_GPR);
4259 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
4261 fprintf(stderr, "%s:%d Could not find a free GPR register\n",
4262 __FUNCTION__, __LINE__);
4267 pcop->type = PCOR(pcop)->r->pc_type;
4272 pCodeOp *pic16_newpCodeOpRegNotVect(bitVect *bv)
4277 pcop = Safe_calloc(1, sizeof(pCodeOpReg));
4280 r = pic16_findFreeReg(REG_GPR);
4283 if(!bitVectBitValue(bv, r->rIdx)) {
4285 PCOR(pcop)->rIdx = r->rIdx;
4286 pcop->type = r->pc_type;
4290 r = pic16_findFreeRegNext(REG_GPR, r);
4298 pCodeOp *pic16_newpCodeOpRegFromStr(char *name)
4303 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
4304 PCOR(pcop)->r = r = pic16_allocRegByName(name, 1, NULL);
4305 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
4306 pcop->type = PCOR(pcop)->r->pc_type;
4307 pcop->name = PCOR(pcop)->r->name;
4309 // if(pic16_pcode_verbose) {
4310 // fprintf(stderr, "%s:%d %s allocates register %s rIdx:0x%02x\n",
4311 // __FILE__, __LINE__, __FUNCTION__, r->name, r->rIdx);
4317 /*-----------------------------------------------------------------*/
4318 /*-----------------------------------------------------------------*/
4319 pCodeOp *pic16_newpCodeOpOpt(OPT_TYPE type, char *key)
4323 pcop = Safe_calloc(1, sizeof(pCodeOpOpt));
4326 pcop->key = Safe_strdup( key );
4328 return (PCOP(pcop));
4331 /*-----------------------------------------------------------------*/
4332 /*-----------------------------------------------------------------*/
4333 pCodeOp *pic16_newpCodeOpLocalRegs(LR_TYPE type)
4335 pCodeOpLocalReg *pcop;
4337 pcop = Safe_calloc(1, sizeof(pCodeOpLocalReg));
4341 return (PCOP(pcop));
4345 /*-----------------------------------------------------------------*/
4346 /*-----------------------------------------------------------------*/
4348 pCodeOp *pic16_newpCodeOp(char *name, PIC_OPTYPE type)
4355 pcop = pic16_newpCodeOpBit(name, -1,0, type);
4359 pcop = pic16_newpCodeOpLit(-1);
4363 pcop = pic16_newpCodeOpLabel(NULL,-1);
4366 pcop = pic16_newpCodeOpReg(-1);
4369 case PO_GPR_REGISTER:
4371 pcop = pic16_newpCodeOpRegFromStr(name);
4373 pcop = pic16_newpCodeOpReg(-1);
4377 pcop = Safe_calloc(1,sizeof(pCodeOp) );
4380 pcop->name = Safe_strdup(name);
4388 #define DB_ITEMS_PER_LINE 8
4390 typedef struct DBdata
4397 static int DBd_init = -1;
4399 /*-----------------------------------------------------------------*/
4400 /* Initialiase "DB" data buffer */
4401 /*-----------------------------------------------------------------*/
4402 void pic16_initDB(void)
4408 /*-----------------------------------------------------------------*/
4409 /* Flush pending "DB" data to a pBlock */
4411 /* ptype - type of p pointer, 'f' file pointer, 'p' pBlock pointer */
4412 /*-----------------------------------------------------------------*/
4413 void pic16_flushDB(char ptype, void *p)
4417 pic16_addpCode2pBlock(((pBlock *)p),pic16_newpCodeAsmDir("DB", "%s", DBd.buffer));
4420 fprintf(((FILE *)p), "\tdb\t%s\n", DBd.buffer);
4423 fprintf(stderr, "PIC16 port error: could not emit initial value data\n");
4427 DBd.buffer[0] = '\0';
4432 /*-----------------------------------------------------------------*/
4433 /* Add "DB" directives to a pBlock */
4434 /*-----------------------------------------------------------------*/
4435 void pic16_emitDB(char c, char ptype, void *p)
4440 // we need to initialize
4443 DBd.buffer[0] = '\0';
4446 l = strlen(DBd.buffer);
4447 sprintf(DBd.buffer+l,"%s0x%02x", (DBd.count>0?", ":""), c & 0xff);
4449 // fprintf(stderr, "%s:%d DBbuffer: '%s'\n", __FILE__, __LINE__, DBd.buffer);
4452 if (DBd.count>= DB_ITEMS_PER_LINE)
4453 pic16_flushDB(ptype, p);
4456 void pic16_emitDS(char *s, char ptype, void *p)
4461 // we need to initialize
4464 DBd.buffer[0] = '\0';
4467 l = strlen(DBd.buffer);
4468 sprintf(DBd.buffer+l,"%s%s", (DBd.count>0?", ":""), s);
4470 // fprintf(stderr, "%s:%d DBbuffer: '%s'\n", __FILE__, __LINE__, DBd.buffer);
4472 DBd.count++; //=strlen(s);
4474 pic16_flushDB(ptype, p);
4478 /*-----------------------------------------------------------------*/
4479 /*-----------------------------------------------------------------*/
4480 void pic16_pCodeConstString(char *name, char *value)
4484 // fprintf(stderr, " %s %s %s\n",__FUNCTION__,name,value);
4489 pb = pic16_newpCodeChain(NULL, 'P',pic16_newpCodeCharP("; Starting pCode block"));
4491 pic16_addpBlock(pb);
4493 // sprintf(buffer,"; %s = ", name);
4494 // strcat(buffer, value);
4495 // fputs(buffer, stderr);
4497 // pic16_addpCode2pBlock(pb,pic16_newpCodeCharP(buffer));
4498 pic16_addpCode2pBlock(pb,pic16_newpCodeLabel(name,-1));
4501 pic16_emitDB(*value, 'p', (void *)pb);
4503 pic16_flushDB('p', (void *)pb);
4506 /*-----------------------------------------------------------------*/
4507 /*-----------------------------------------------------------------*/
4509 static void pCodeReadCodeTable(void)
4513 fprintf(stderr, " %s\n",__FUNCTION__);
4515 pb = pic16_newpCodeChain(NULL, 'P',pic16_newpCodeCharP("; Starting pCode block"));
4517 pic16_addpBlock(pb);
4519 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; ReadCodeTable - built in function"));
4520 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; Inputs: temp1,temp2 = code pointer"));
4521 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; Outpus: W (from RETLW at temp2:temp1)"));
4522 pic16_addpCode2pBlock(pb,pic16_newpCodeLabel("ReadCodeTable:",-1));
4524 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVFW,pic16_newpCodeOpRegFromStr("temp2")));
4525 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVWF,pic16_newpCodeOpRegFromStr("PCLATH")));
4526 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVFW,pic16_newpCodeOpRegFromStr("temp1")));
4527 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVWF,pic16_newpCodeOpRegFromStr("PCL")));
4532 /*-----------------------------------------------------------------*/
4533 /* pic16_addpCode2pBlock - place the pCode into the pBlock linked list */
4534 /*-----------------------------------------------------------------*/
4535 void pic16_addpCode2pBlock(pBlock *pb, pCode *pc)
4542 /* If this is the first pcode to be added to a block that
4543 * was initialized with a NULL pcode, then go ahead and
4544 * make this pcode the head and tail */
4545 pb->pcHead = pb->pcTail = pc;
4548 pb->pcTail->next = pc;
4550 pc->prev = pb->pcTail;
4557 /*-----------------------------------------------------------------*/
4558 /* pic16_addpBlock - place a pBlock into the pFile */
4559 /*-----------------------------------------------------------------*/
4560 void pic16_addpBlock(pBlock *pb)
4562 // fprintf(stderr," Adding pBlock: dbName =%c\n",getpBlock_dbName(pb));
4565 /* First time called, we'll pass through here. */
4566 //_ALLOC(the_pFile,sizeof(pFile));
4567 the_pFile = Safe_calloc(1,sizeof(pFile));
4568 the_pFile->pbHead = the_pFile->pbTail = pb;
4569 the_pFile->functions = NULL;
4573 the_pFile->pbTail->next = pb;
4574 pb->prev = the_pFile->pbTail;
4576 the_pFile->pbTail = pb;
4579 /*-----------------------------------------------------------------*/
4580 /* removepBlock - remove a pBlock from the pFile */
4581 /*-----------------------------------------------------------------*/
4582 static void removepBlock(pBlock *pb)
4590 //fprintf(stderr," Removing pBlock: dbName =%c\n",getpBlock_dbName(pb));
4592 for(pbs = the_pFile->pbHead; pbs; pbs = pbs->next) {
4595 if(pbs == the_pFile->pbHead)
4596 the_pFile->pbHead = pbs->next;
4598 if (pbs == the_pFile->pbTail)
4599 the_pFile->pbTail = pbs->prev;
4602 pbs->next->prev = pbs->prev;
4605 pbs->prev->next = pbs->next;
4612 fprintf(stderr, "Warning: call to %s:%s didn't find pBlock\n",__FILE__,__FUNCTION__);
4616 /*-----------------------------------------------------------------*/
4617 /* printpCode - write the contents of a pCode to a file */
4618 /*-----------------------------------------------------------------*/
4619 static void printpCode(FILE *of, pCode *pc)
4630 fprintf(of,"warning - unable to print pCode\n");
4633 /*-----------------------------------------------------------------*/
4634 /* pic16_printpBlock - write the contents of a pBlock to a file */
4635 /*-----------------------------------------------------------------*/
4636 void pic16_printpBlock(FILE *of, pBlock *pb)
4644 for(pc = pb->pcHead; pc; pc = pc->next) {
4645 if(isPCF(pc) && PCF(pc)->fname) {
4646 fprintf(of, "S_%s_%s\tcode", PCF(pc)->modname, PCF(pc)->fname);
4647 if(pb->dbName == 'A') {
4649 for(ab=setFirstItem(absSymSet); ab; ab=setNextItem(absSymSet)) {
4650 // fprintf(stderr, "%s:%d testing %s <-> %s\n", __FILE__, __LINE__, PCF(pc)->fname, ab->name);
4651 if(!strcmp(ab->name, PCF(pc)->fname)) {
4652 // fprintf(stderr, "%s:%d address = %x\n", __FILE__, __LINE__, ab->address);
4653 if(ab->address != -1)
4654 fprintf(of, "\t0X%06X", ab->address);
4665 /*-----------------------------------------------------------------*/
4667 /* pCode processing */
4671 /*-----------------------------------------------------------------*/
4672 pCode * pic16_findNextInstruction(pCode *pci);
4673 pCode * pic16_findPrevInstruction(pCode *pci);
4675 void pic16_unlinkpCode(pCode *pc)
4681 fprintf(stderr,"Unlinking: ");
4682 printpCode(stderr, pc);
4685 pc->prev->next = pc->next;
4687 pc->next->prev = pc->prev;
4689 /* move C source line down (or up) */
4690 if (isPCI(pc) && PCI(pc)->cline) {
4691 prev = pic16_findNextInstruction (pc->next);
4692 if (prev && isPCI(prev) && !PCI(prev)->cline) {
4693 PCI(prev)->cline = PCI(pc)->cline;
4695 prev = pic16_findPrevInstruction (pc->prev);
4696 if (prev && isPCI(prev) && !PCI(prev)->cline)
4697 PCI(prev)->cline = PCI(pc)->cline;
4700 pc->prev = pc->next = NULL;
4704 /*-----------------------------------------------------------------*/
4705 /*-----------------------------------------------------------------*/
4707 static void genericDestruct(pCode *pc)
4710 pic16_unlinkpCode(pc);
4713 /* For instructions, tell the register (if there's one used)
4714 * that it's no longer needed */
4715 regs *reg = pic16_getRegFromInstruction(pc);
4717 deleteSetItem (&(reg->reglives.usedpCodes),pc);
4719 if(PCI(pc)->is2MemOp) {
4720 reg = pic16_getRegFromInstruction2(pc);
4722 deleteSetItem(&(reg->reglives.usedpCodes), pc);
4726 /* Instead of deleting the memory used by this pCode, mark
4727 * the object as bad so that if there's a pointer to this pCode
4728 * dangling around somewhere then (hopefully) when the type is
4729 * checked we'll catch it.
4733 pic16_addpCode2pBlock(pb_dead_pcodes, pc);
4739 void DEBUGpic16_emitcode (char *inst,char *fmt, ...);
4740 /*-----------------------------------------------------------------*/
4741 /*-----------------------------------------------------------------*/
4742 /* modifiers for constant immediate */
4743 const char *immdmod[3]={"LOW", "HIGH", "UPPER"};
4745 char *pic16_get_op(pCodeOp *pcop,char *buffer, size_t size)
4750 int use_buffer = 1; // copy the string to the passed buffer pointer
4755 use_buffer = 0; // Don't bother copying the string to the buffer.
4759 switch(pcop->type) {
4767 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
4770 return PCOR(pcop)->r->name;
4773 r = pic16_regWithIdx(PCOR(pcop)->r->rIdx);
4775 SAFE_snprintf(&buffer,&size,"%s",r->name);
4782 if(PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
4783 if(PCOI(pcop)->index) {
4784 SAFE_snprintf(&s,&size, "%s(%s + %d)",
4785 immdmod[ PCOI(pcop)->offset ],
4789 SAFE_snprintf(&s,&size,"%s(%s)",
4790 immdmod[ PCOI(pcop)->offset ],
4794 if(PCOI(pcop)->index) {
4795 SAFE_snprintf(&s,&size, "%s(%s + %d)",
4800 SAFE_snprintf(&s,&size, "%s(%s)",
4807 case PO_GPR_REGISTER:
4810 // size = sizeof(buffer);
4811 if( PCOR(pcop)->instance) {
4812 SAFE_snprintf(&s,&size,"(%s + %d)",
4814 PCOR(pcop)->instance );
4816 SAFE_snprintf(&s,&size,"%s",pcop->name);
4821 if(PCORB(pcop)->subtype == PO_GPR_TEMP) {
4822 SAFE_snprintf(&s, &size, "%s", pcop->name);
4824 if(PCORB(pcop)->pcor.instance)
4825 SAFE_snprintf(&s, &size, "(%s + %d)", pcop->name, PCORB(pcop)->pcor.instance);
4827 SAFE_snprintf(&s, &size, "%s", pcop->name);
4834 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
4843 return "NO operand1";
4846 /*-----------------------------------------------------------------*/
4847 /* pic16_get_op2 - variant to support two memory operand commands */
4848 /*-----------------------------------------------------------------*/
4849 char *pic16_get_op2(pCodeOp *pcop,char *buffer, size_t size)
4854 int use_buffer = 1; // copy the string to the passed buffer pointer
4859 use_buffer = 0; // Don't bother copying the string to the buffer.
4863 fprintf(stderr, "%s:%d second operand %s is %d\tPO_DIR(%d) PO_GPR_TEMP(%d) PO_IMMEDIATE(%d) PO_INDF0(%d) PO_FSR0(%d)\n",
4864 __FUNCTION__, __LINE__, PCOR(PCOR2(pcop)->pcop2)->r->name, PCOR2(pcop)->pcop2->type,
4865 PO_DIR, PO_GPR_TEMP, PO_IMMEDIATE, PO_INDF0, PO_FSR0);
4869 switch(PCOR2(pcop)->pcop2->type) {
4877 SAFE_snprintf(&buffer,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4880 return PCOR(PCOR2(pcop)->pcop2)->r->name;
4883 r = pic16_regWithIdx(PCOR(PCOR2(pcop)->pcop2)->r->rIdx);
4886 SAFE_snprintf(&buffer,&size,"%s",r->name);
4897 if(PCOI(pcop)->_const) {
4898 if( PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
4899 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
4902 8 * PCOI(pcop)->offset );
4904 SAFE_snprintf(&s,&size,"LOW(%s+%d)",pcop->name,PCOI(pcop)->index);
4906 if( PCOI(pcop)->index) {
4907 SAFE_snprintf(&s,&size,"(%s + %d)",
4909 PCOI(pcop)->index );
4911 if(PCOI(pcop)->offset)
4912 SAFE_snprintf(&s,&size,"(%s >> %d)&0xff",pcop->name, 8*PCOI(pcop)->offset);
4914 SAFE_snprintf(&s,&size,"%s",pcop->name);
4921 if( PCOR(PCOR2(pcop)->pcop2)->instance) {
4922 SAFE_snprintf(&s,&size,"(%s + %d)",
4923 PCOR(PCOR2(pcop)->pcop2)->r->name,
4924 PCOR(PCOR2(pcop)->pcop2)->instance );
4926 SAFE_snprintf(&s,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4931 if(PCOR(PCOR2(pcop)->pcop2)->r->name) {
4933 SAFE_snprintf(&buffer,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4936 return PCOR(PCOR2(pcop)->pcop2)->r->name;
4941 return "NO operand2";
4944 /*-----------------------------------------------------------------*/
4945 /*-----------------------------------------------------------------*/
4946 static char *pic16_get_op_from_instruction( pCodeInstruction *pcc)
4950 return pic16_get_op(pcc->pcop,NULL,0);
4952 /* gcc 3.2: warning: concatenation of string literals with __FUNCTION__ is deprecated
4953 * return ("ERROR Null: "__FUNCTION__);
4955 return ("ERROR Null: pic16_get_op_from_instruction");
4959 /*-----------------------------------------------------------------*/
4960 /*-----------------------------------------------------------------*/
4961 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
4964 fprintf(of,"pcodeopprint- not implemented\n");
4967 /*-----------------------------------------------------------------*/
4968 /* pic16_pCode2str - convert a pCode instruction to string */
4969 /*-----------------------------------------------------------------*/
4970 char *pic16_pCode2str(char *str, size_t size, pCode *pc)
4976 if(isPCI(pc) && (PCI(pc)->pci_magic != PCI_MAGIC)) {
4977 fprintf(stderr, "%s:%d: pCodeInstruction initialization error in instruction %s, magic is %x (defaut: %x)\n",
4978 __FILE__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pci_magic, PCI_MAGIC);
4986 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
4988 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
4990 if(PCI(pc)->is2MemOp) {
4991 SAFE_snprintf(&s,&size, "%s, %s",
4992 pic16_get_op(PCOP(PCI(pc)->pcop), NULL, 0),
4993 pic16_get_op2(PCOP(PCI(pc)->pcop), NULL, 0));
4997 if(PCI(pc)->is2LitOp) {
4998 SAFE_snprintf(&s,&size, "%s", PCOP(PCI(pc)->pcop)->name);
5002 if(PCI(pc)->isBitInst) {
5003 if(PCI(pc)->pcop->type != PO_GPR_BIT) {
5004 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
5005 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)",
5006 PCI(pc)->pcop->name ,
5007 PCI(pc)->pcop->name );
5009 SAFE_snprintf(&s,&size,"%s,%d", pic16_get_op_from_instruction(PCI(pc)),
5010 // (((pCodeOpRegBit *)(PCI(pc)->pcop))->pcor.instance),
5011 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit ));
5013 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
5014 SAFE_snprintf(&s,&size,"%s, %d", pic16_get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
5016 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", pic16_get_op_from_instruction(PCI(pc)));
5017 //PCI(pc)->pcop->t.bit );
5020 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
5021 if( PCI(pc)->num_ops == 3)
5022 SAFE_snprintf(&s,&size,"(%s >> 3),%c",pic16_get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
5024 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",pic16_get_op_from_instruction(PCI(pc)));
5029 SAFE_snprintf(&s,&size,"%s", pic16_get_op_from_instruction(PCI(pc)));
5032 if( PCI(pc)->num_ops == 3 || ((PCI(pc)->num_ops == 2) && (PCI(pc)->isAccess))) {
5033 if(PCI(pc)->num_ops == 3 && !PCI(pc)->isBitInst)
5034 SAFE_snprintf(&s,&size,", %c", ( (PCI(pc)->isModReg) ? 'F':'W'));
5036 r = pic16_getRegFromInstruction(pc);
5037 // fprintf(stderr, "%s:%d reg = %p\tname= %s, accessBank= %d\n",
5038 // __FUNCTION__, __LINE__, r, (r)?r->name:"<null>", (r)?r->accessBank:-1);
5040 if(PCI(pc)->isAccess) {
5041 static char *bank_spec[2][2] = {
5042 { "", ", ACCESS" }, /* gpasm uses access bank by default */
5043 { ", B", ", BANKED" }/* MPASM (should) use BANKED by default */
5046 SAFE_snprintf(&s,&size,"%s", bank_spec[(r && !r->accessBank) ? 1 : 0][pic16_mplab_comp ? 1 : 0]);
5055 /* assuming that comment ends with a \n */
5056 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
5060 SAFE_snprintf(&s,&size,"; info ==>");
5061 switch( PCINF(pc)->type ) {
5062 case INF_OPTIMIZATION:
5063 SAFE_snprintf(&s,&size, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5066 SAFE_snprintf(&s,&size, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5071 /* assuming that inline code ends with a \n */
5072 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
5076 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
5079 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
5082 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
5085 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
5088 // SAFE_snprintf(&s,&size,";#CSRC\t%s %d\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5089 SAFE_snprintf(&s,&size,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5090 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5093 if(PCAD(pc)->directive) {
5094 SAFE_snprintf(&s,&size,"\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5097 /* special case to handle inline labels without a tab */
5098 SAFE_snprintf(&s,&size,"%s\n", PCAD(pc)->arg);
5103 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
5111 /*-----------------------------------------------------------------*/
5112 /* genericPrint - the contents of a pCode to a file */
5113 /*-----------------------------------------------------------------*/
5114 static void genericPrint(FILE *of, pCode *pc)
5122 // fputs(((pCodeComment *)pc)->comment, of);
5123 fprintf(of,"; %s\n", ((pCodeComment *)pc)->comment);
5128 pBranch *pbl = PCI(pc)->label;
5129 while(pbl && pbl->pc) {
5130 if(pbl->pc->type == PC_LABEL)
5131 pCodePrintLabel(of, pbl->pc);
5136 if(pic16_pcode_verbose) {
5137 fprintf(of, "; info ==>");
5138 switch(((pCodeInfo *)pc)->type) {
5139 case INF_OPTIMIZATION:
5140 fprintf(of, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5143 fprintf(of, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5151 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
5155 // If the opcode has a label, print that first
5157 pBranch *pbl = PCI(pc)->label;
5158 while(pbl && pbl->pc) {
5159 if(pbl->pc->type == PC_LABEL)
5160 pCodePrintLabel(of, pbl->pc);
5166 genericPrint(of,PCODE(PCI(pc)->cline));
5171 pic16_pCode2str(str, 256, pc);
5173 fprintf(of,"%s",str);
5175 if(pic16_debug_verbose) {
5176 fprintf(of, "\t;key=%03x",pc->seq);
5178 fprintf(of,", flow seq=%03x",PCI(pc)->pcflow->pc.seq);
5185 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
5186 if(PCW(pc)->pci.label)
5187 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
5189 if(PCW(pc)->operand) {
5190 fprintf(of,";\toperand ");
5191 pCodeOpPrint(of,PCW(pc)->operand );
5196 if(pic16_debug_verbose) {
5197 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
5198 if(PCFL(pc)->ancestor)
5199 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
5206 // fprintf(of,";#CSRC\t%s %d\t\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5207 fprintf(of,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5208 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5214 pBranch *pbl = PCAD(pc)->pci.label;
5215 while(pbl && pbl->pc) {
5216 if(pbl->pc->type == PC_LABEL)
5217 pCodePrintLabel(of, pbl->pc);
5221 if(PCAD(pc)->directive) {
5222 fprintf(of, "\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5225 /* special case to handle inline labels without tab */
5226 fprintf(of, "%s\n", PCAD(pc)->arg);
5232 fprintf(of,"unknown pCode type %d\n",pc->type);
5237 /*-----------------------------------------------------------------*/
5238 /* pCodePrintFunction - prints function begin/end */
5239 /*-----------------------------------------------------------------*/
5241 static void pCodePrintFunction(FILE *of, pCode *pc)
5248 if( ((pCodeFunction *)pc)->modname)
5249 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
5252 if(!PCF(pc)->absblock) {
5253 if(PCF(pc)->fname) {
5254 pBranch *exits = PCF(pc)->to;
5257 fprintf(of,"%s:", PCF(pc)->fname);
5259 if(pic16_pcode_verbose)
5260 fprintf(of, "\t;Function start");
5266 exits = exits->next;
5270 if(pic16_pcode_verbose)
5271 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
5274 if((PCF(pc)->from &&
5275 PCF(pc)->from->pc->type == PC_FUNCTION &&
5276 PCF(PCF(pc)->from->pc)->fname) ) {
5278 if(pic16_pcode_verbose)
5279 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
5281 if(pic16_pcode_verbose)
5282 fprintf(of,"; exit point [can't find entry point]\n");
5288 /*-----------------------------------------------------------------*/
5289 /* pCodePrintLabel - prints label */
5290 /*-----------------------------------------------------------------*/
5292 static void pCodePrintLabel(FILE *of, pCode *pc)
5299 fprintf(of,"%s:\n",PCL(pc)->label);
5300 else if (PCL(pc)->key >=0)
5301 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
5303 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
5306 /*-----------------------------------------------------------------*/
5307 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
5308 /* remove it if it is found. */
5309 /*-----------------------------------------------------------------*/
5310 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
5317 if(pcl->type == PC_OPCODE || pcl->type == PC_INLINE || pcl->type == PC_ASMDIR)
5318 b = PCI(pcl)->label;
5320 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
5325 //fprintf (stderr, "%s \n",__FUNCTION__);
5326 //pcl->print(stderr,pcl);
5327 //pc->print(stderr,pc);
5330 //fprintf (stderr, "found label\n");
5331 //pc->print(stderr, pc);
5335 bprev->next = b->next; /* Not first pCode in chain */
5339 PCI(pcl)->label = b->next; /* First pCode in chain */
5342 return; /* A label can't occur more than once */
5350 /*-----------------------------------------------------------------*/
5351 /*-----------------------------------------------------------------*/
5352 pBranch * pic16_pBranchAppend(pBranch *h, pBranch *n)
5371 /*-----------------------------------------------------------------*/
5372 /* pBranchLink - given two pcodes, this function will link them */
5373 /* together through their pBranches */
5374 /*-----------------------------------------------------------------*/
5375 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
5379 // Declare a new branch object for the 'from' pCode.
5381 //_ALLOC(b,sizeof(pBranch));
5382 b = Safe_calloc(1,sizeof(pBranch));
5383 b->pc = PCODE(t); // The link to the 'to' pCode.
5386 f->to = pic16_pBranchAppend(f->to,b);
5388 // Now do the same for the 'to' pCode.
5390 //_ALLOC(b,sizeof(pBranch));
5391 b = Safe_calloc(1,sizeof(pBranch));
5395 t->from = pic16_pBranchAppend(t->from,b);
5400 /*-----------------------------------------------------------------*/
5401 /* pBranchFind - find the pBranch in a pBranch chain that contains */
5403 /*-----------------------------------------------------------------*/
5404 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
5417 /*-----------------------------------------------------------------*/
5418 /* pic16_pCodeUnlink - Unlink the given pCode from its pCode chain. */
5419 /*-----------------------------------------------------------------*/
5420 void pic16_pCodeUnlink(pCode *pc)
5425 if(!pc->prev || !pc->next) {
5426 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
5430 /* move C source line down (or up) */
5431 if (isPCI(pc) && PCI(pc)->cline) {
5432 pc1 = pic16_findNextInstruction (pc->next);
5433 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline) {
5434 PCI(pc1)->cline = PCI(pc)->cline;
5436 pc1 = pic16_findPrevInstruction (pc->prev);
5437 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline)
5438 PCI(pc1)->cline = PCI(pc)->cline;
5442 /* first remove the pCode from the chain */
5443 pc->prev->next = pc->next;
5444 pc->next->prev = pc->prev;
5446 pc->prev = pc->next = NULL;
5448 /* Now for the hard part... */
5450 /* Remove the branches */
5452 pb1 = PCI(pc)->from;
5454 pc1 = pb1->pc; /* Get the pCode that branches to the
5455 * one we're unlinking */
5457 /* search for the link back to this pCode (the one we're
5459 if((pb2 = pBranchFind(PCI(pc1)->to,pc))) {
5460 pb2->pc = PCI(pc)->to->pc; // make the replacement
5462 /* if the pCode we're unlinking contains multiple 'to'
5463 * branches (e.g. this a skip instruction) then we need
5464 * to copy these extra branches to the chain. */
5465 if(PCI(pc)->to->next)
5466 pic16_pBranchAppend(pb2, PCI(pc)->to->next);
5475 /*-----------------------------------------------------------------*/
5476 /*-----------------------------------------------------------------*/
5478 static void genericAnalyze(pCode *pc)
5488 // Go through the pCodes that are in pCode chain and link
5489 // them together through the pBranches. Note, the pCodes
5490 // are linked together as a contiguous stream like the
5491 // assembly source code lines. The linking here mimics this
5492 // except that comments are not linked in.
5494 pCode *npc = pc->next;
5496 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
5497 pBranchLink(pc,npc);
5502 /* reached the end of the pcode chain without finding
5503 * an instruction we could link to. */
5507 fprintf(stderr,"analyze PC_FLOW\n");
5511 fprintf(stderr,,";A bad pCode is being used\n");
5517 /*-----------------------------------------------------------------*/
5518 /*-----------------------------------------------------------------*/
5519 static int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
5523 if(pc->type == PC_LABEL) {
5524 if( ((pCodeLabel *)pc)->key == pcop_label->key)
5527 if((pc->type == PC_OPCODE)
5528 || (pc->type == PC_ASMDIR)
5530 pbr = PCI(pc)->label;
5532 if(pbr->pc->type == PC_LABEL) {
5533 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
5543 /*-----------------------------------------------------------------*/
5544 /*-----------------------------------------------------------------*/
5545 static int checkLabel(pCode *pc)
5549 if(pc && isPCI(pc)) {
5550 pbr = PCI(pc)->label;
5552 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
5562 /*-----------------------------------------------------------------*/
5563 /* findLabelinpBlock - Search the pCode for a particular label */
5564 /*-----------------------------------------------------------------*/
5565 static pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
5572 for(pc = pb->pcHead; pc; pc = pc->next)
5573 if(compareLabel(pc,pcop_label))
5579 /*-----------------------------------------------------------------*/
5580 /* findLabel - Search the pCode for a particular label */
5581 /*-----------------------------------------------------------------*/
5582 static pCode * findLabel(pCodeOpLabel *pcop_label)
5590 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5591 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
5595 fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
5599 /*-----------------------------------------------------------------*/
5600 /* pic16_findNextpCode - given a pCode, find the next of type 'pct' */
5601 /* in the linked list */
5602 /*-----------------------------------------------------------------*/
5603 pCode * pic16_findNextpCode(pCode *pc, PC_TYPE pct)
5616 /*-----------------------------------------------------------------*/
5617 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
5618 /* in the linked list */
5619 /*-----------------------------------------------------------------*/
5620 static pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
5634 //#define PCODE_DEBUG
5635 /*-----------------------------------------------------------------*/
5636 /* pic16_findNextInstruction - given a pCode, find the next instruction */
5637 /* in the linked list */
5638 /*-----------------------------------------------------------------*/
5639 pCode * pic16_findNextInstruction(pCode *pci)
5644 if((pc->type == PC_OPCODE)
5645 || (pc->type == PC_WILD)
5646 || (pc->type == PC_ASMDIR)
5651 fprintf(stderr,"pic16_findNextInstruction: ");
5652 printpCode(stderr, pc);
5657 //fprintf(stderr,"Couldn't find instruction\n");
5661 /*-----------------------------------------------------------------*/
5662 /* pic16_findPrevInstruction - given a pCode, find the next instruction */
5663 /* in the linked list */
5664 /*-----------------------------------------------------------------*/
5665 pCode * pic16_findPrevInstruction(pCode *pci)
5671 if((pc->type == PC_OPCODE)
5672 || (pc->type == PC_WILD)
5673 || (pc->type == PC_ASMDIR)
5679 fprintf(stderr,"pic16_findPrevInstruction: ");
5680 printpCode(stderr, pc);
5685 //fprintf(stderr,"Couldn't find instruction\n");
5692 /*-----------------------------------------------------------------*/
5693 /* findFunctionEnd - given a pCode find the end of the function */
5694 /* that contains it */
5695 /*-----------------------------------------------------------------*/
5696 static pCode * findFunctionEnd(pCode *pc)
5700 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
5706 fprintf(stderr,"Couldn't find function end\n");
5711 /*-----------------------------------------------------------------*/
5712 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
5713 /* instruction with which it is associated. */
5714 /*-----------------------------------------------------------------*/
5715 static void AnalyzeLabel(pCode *pc)
5718 pic16_pCodeUnlink(pc);
5724 static void AnalyzeGOTO(pCode *pc)
5727 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
5731 static void AnalyzeSKIP(pCode *pc)
5734 pBranchLink(pc,pic16_findNextInstruction(pc->next));
5735 pBranchLink(pc,pic16_findNextInstruction(pc->next->next));
5739 static void AnalyzeRETURN(pCode *pc)
5742 // branch_link(pc,findFunctionEnd(pc->next));
5748 /*-------------------------------------------------------------------*/
5749 /* pic16_getRegFrompCodeOp - extract the register from a pCodeOp */
5750 /* if one is present. This is the common */
5751 /* part of pic16_getRegFromInstruction(2) */
5752 /*-------------------------------------------------------------------*/
5754 regs * pic16_getRegFrompCodeOp (pCodeOp *pcop) {
5755 if (!pcop) return NULL;
5757 switch(pcop->type) {
5770 return PCOR(pcop)->r;
5772 case PO_SFR_REGISTER:
5773 //fprintf (stderr, "%s - SFR\n", __FUNCTION__);
5774 return PCOR(pcop)->r;
5778 // fprintf(stderr, "pic16_getRegFromInstruction - bit or temp\n");
5779 return PCOR(pcop)->r;
5782 // return pic16_dirregWithName(PCOI(pcop)->r->name);
5785 return (PCOI(pcop)->r);
5790 return PCOR(pcop)->r;
5792 case PO_GPR_REGISTER:
5794 // fprintf(stderr, "pic16_getRegFromInstruction - dir\n");
5795 return PCOR(pcop)->r;
5798 //fprintf(stderr, "pic16_getRegFromInstruction - literal\n");
5803 //fprintf (stderr, "%s - label or address: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5808 /* this should never turn up */
5809 //fprintf (stderr, "%s - unused pCodeOp->type: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5816 fprintf(stderr, "pic16_getRegFromInstruction - unknown reg type %d (%s)\n",pcop->type, dumpPicOptype (pcop->type));
5824 /*-----------------------------------------------------------------*/
5825 /*-----------------------------------------------------------------*/
5826 regs * pic16_getRegFromInstruction(pCode *pc)
5832 PCI(pc)->num_ops == 0 ||
5833 (PCI(pc)->num_ops == 1 && PCI(pc)->isFastCall))
5837 fprintf(stderr, "pic16_getRegFromInstruction - reg type %s (%d)\n",
5838 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5841 return pic16_getRegFrompCodeOp (PCI(pc)->pcop);
5844 /*-------------------------------------------------------------------------------*/
5845 /* pic16_getRegFromInstruction2 - variant to support two memory operand commands */
5846 /*-------------------------------------------------------------------------------*/
5847 regs * pic16_getRegFromInstruction2(pCode *pc)
5853 PCI(pc)->num_ops == 0 ||
5854 (PCI(pc)->num_ops == 1)) // accept only 2 operand commands
5859 fprintf(stderr, "pic16_getRegFromInstruction2 - reg type %s (%d)\n",
5860 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5863 return pic16_getRegFrompCodeOp (PCOR2(PCI(pc)->pcop)->pcop2);
5866 /*-----------------------------------------------------------------*/
5867 /*-----------------------------------------------------------------*/
5869 static void AnalyzepBlock(pBlock *pb)
5876 /* Find all of the registers used in this pBlock
5877 * by looking at each instruction and examining it's
5880 for(pc = pb->pcHead; pc; pc = pc->next) {
5882 /* Is this an instruction with operands? */
5883 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
5885 if(PCI(pc)->pcop->type == PO_GPR_TEMP) {
5887 /* Loop through all of the registers declared so far in
5888 this block and see if we find this one there */
5890 regs *r = setFirstItem(pb->tregisters);
5893 if(r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) {
5894 PCOR(PCI(pc)->pcop)->r = r;
5897 r = setNextItem(pb->tregisters);
5901 /* register wasn't found */
5902 //r = Safe_calloc(1, sizeof(regs));
5903 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
5904 //addSet(&pb->tregisters, r);
5905 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
5906 //PCOR(PCI(pc)->pcop)->r = r;
5907 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
5909 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
5912 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
5913 if(PCOR(PCI(pc)->pcop)->r) {
5914 pic16_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
5915 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
5917 if(PCI(pc)->pcop->name)
5918 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
5920 fprintf(stderr,"ERROR: NULL register\n");
5929 /*-----------------------------------------------------------------*/
5931 /*-----------------------------------------------------------------*/
5932 #define PCI_HAS_LABEL(x) ((x) && (PCI(x)->label != NULL))
5934 static void InsertpFlow(pCode *pc, pCode **pflow)
5937 PCFL(*pflow)->end = pc;
5939 if(!pc || !pc->next)
5942 *pflow = pic16_newpCodeFlow();
5943 pic16_pCodeInsertAfter(pc, *pflow);
5946 /*-----------------------------------------------------------------*/
5947 /* pic16_BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
5948 /* the flow blocks. */
5950 * pic16_BuildFlow inserts pCodeFlow objects into the pCode chain at each
5951 * point the instruction flow changes.
5953 /*-----------------------------------------------------------------*/
5954 void pic16_BuildFlow(pBlock *pb)
5957 pCode *last_pci=NULL;
5964 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
5965 /* Insert a pCodeFlow object at the beginning of a pBlock */
5967 InsertpFlow(pb->pcHead, &pflow);
5969 //pflow = pic16_newpCodeFlow(); /* Create a new Flow object */
5970 //pflow->next = pb->pcHead; /* Make the current head the next object */
5971 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
5972 //pb->pcHead = pflow; /* Make the Flow object the head */
5975 for( pc = pic16_findNextInstruction(pb->pcHead);
5977 pc=pic16_findNextInstruction(pc)) {
5980 PCI(pc)->pcflow = PCFL(pflow);
5982 //fprintf(stderr," build: ");
5983 //pflow->print(stderr,pflow);
5985 if (checkLabel(pc)) {
5987 /* This instruction marks the beginning of a
5988 * new flow segment */
5993 /* If the previous pCode is not a flow object, then
5994 * insert a new flow object. (This check prevents
5995 * two consecutive flow objects from being insert in
5996 * the case where a skip instruction preceeds an
5997 * instruction containing a label.) */
5999 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
6000 InsertpFlow(pic16_findPrevInstruction(pc->prev), &pflow);
6002 PCI(pc)->pcflow = PCFL(pflow);
6006 if( PCI(pc)->isSkip) {
6008 /* The two instructions immediately following this one
6009 * mark the beginning of a new flow segment */
6011 while(pc && PCI(pc)->isSkip) {
6013 PCI(pc)->pcflow = PCFL(pflow);
6017 InsertpFlow(pc, &pflow);
6018 pc=pic16_findNextInstruction(pc->next);
6026 PCI(pc)->pcflow = PCFL(pflow);
6028 InsertpFlow(pc, &pflow);
6030 } else if ( PCI(pc)->isBranch && !checkLabel(pic16_findNextInstruction(pc->next))) {
6032 InsertpFlow(pc, &pflow);
6040 //fprintf (stderr,",end seq %d",GpcFlowSeq);
6042 PCFL(pflow)->end = pb->pcTail;
6045 /*-------------------------------------------------------------------*/
6046 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
6047 /* the flow blocks. */
6049 * unBuildFlow removes pCodeFlow objects from a pCode chain
6051 /*-----------------------------------------------------------------*/
6052 static void unBuildFlow(pBlock *pb)
6067 if(PCI(pc)->pcflow) {
6068 //Safe_free(PCI(pc)->pcflow);
6069 PCI(pc)->pcflow = NULL;
6072 } else if(isPCFL(pc) )
6081 /*-----------------------------------------------------------------*/
6082 /*-----------------------------------------------------------------*/
6083 static void dumpCond(int cond)
6086 static char *pcc_str[] = {
6100 int ncond = sizeof(pcc_str) / sizeof(char *);
6103 fprintf(stderr, "0x%04X\n",cond);
6105 for(i=0,j=1; i<ncond; i++, j<<=1)
6107 fprintf(stderr, " %s\n",pcc_str[i]);
6113 /*-----------------------------------------------------------------*/
6114 /*-----------------------------------------------------------------*/
6115 static void FlowStats(pCodeFlow *pcflow)
6123 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
6125 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6128 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
6133 fprintf(stderr, " FlowStats inCond: ");
6134 dumpCond(pcflow->inCond);
6135 fprintf(stderr, " FlowStats outCond: ");
6136 dumpCond(pcflow->outCond);
6140 /*-----------------------------------------------------------------*
6141 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
6142 * if it affects the banking bits.
6144 * return: -1 == Banking bits are unaffected by this pCode.
6146 * return: > 0 == Banking bits are affected.
6148 * If the banking bits are affected, then the returned value describes
6149 * which bits are affected and how they're affected. The lower half
6150 * of the integer maps to the bits that are affected, the upper half
6151 * to whether they're set or cleared.
6153 *-----------------------------------------------------------------*/
6155 static int isBankInstruction(pCode *pc)
6163 if( PCI(pc)->op == POC_MOVLB ||
6164 (( (reg = pic16_getRegFromInstruction(pc)) != NULL) && isBSR_REG(reg))) {
6165 bank = PCOL(pc)->lit;
6172 /*-----------------------------------------------------------------*/
6173 /*-----------------------------------------------------------------*/
6174 static void FillFlow(pCodeFlow *pcflow)
6183 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
6185 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6188 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
6195 isBankInstruction(pc);
6197 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
6201 fprintf(stderr, " FillFlow - Bad end of flow\n");
6203 fprintf(stderr, " FillFlow - Ending flow with\n ");
6204 pc->print(stderr,pc);
6207 fprintf(stderr, " FillFlow inCond: ");
6208 dumpCond(pcflow->inCond);
6209 fprintf(stderr, " FillFlow outCond: ");
6210 dumpCond(pcflow->outCond);
6214 /*-----------------------------------------------------------------*/
6215 /*-----------------------------------------------------------------*/
6216 static void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
6218 pCodeFlowLink *fromLink, *toLink;
6220 if(!from || !to || !to->pcflow || !from->pcflow)
6223 fromLink = pic16_newpCodeFlowLink(from->pcflow);
6224 toLink = pic16_newpCodeFlowLink(to->pcflow);
6226 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
6227 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
6231 pCode *pic16_getJumptabpCode (pCode *pc) {
6234 //fprintf (stderr, "%s - start for %p in %p", __FUNCTION__, pc, isPCI(pc) ? PCI(pc)->pcflow : NULL);
6235 //pc->print (stderr, pc);
6238 if (isPCI(pcinf) && PCI(pcinf)->op != POC_GOTO) return NULL;
6239 if (pcinf->type == PC_INFO && PCINF(pcinf)->type == INF_OPTIMIZATION) {
6240 switch (PCOO(PCINF(pcinf)->oper1)->type) {
6241 case OPT_JUMPTABLE_BEGIN:
6242 /* leading begin of jump table -- in one */
6243 pcinf = pic16_findPrevInstruction (pcinf);
6247 case OPT_JUMPTABLE_END:
6248 /* leading end of jumptable -- not in one */
6253 /* ignore all other PCInfos */
6257 pcinf = pcinf->prev;
6260 /* no PCInfo found -- not in a jumptable */
6264 /*-----------------------------------------------------------------*
6265 * void LinkFlow(pBlock *pb)
6267 * In pic16_BuildFlow, the PIC code has been partitioned into contiguous
6268 * non-branching segments. In LinkFlow, we determine the execution
6269 * order of these segments. For example, if one of the segments ends
6270 * with a skip, then we know that there are two possible flow segments
6271 * to which control may be passed.
6272 *-----------------------------------------------------------------*/
6273 static void LinkFlow(pBlock *pb)
6278 pCode *jumptab_pre = NULL;
6280 //fprintf(stderr,"linkflow \n");
6282 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6284 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6287 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
6289 //fprintf(stderr," link: ");
6290 //pcflow->print(stderr,pcflow);
6292 //FillFlow(PCFL(pcflow));
6294 pc = PCFL(pcflow)->end;
6296 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
6297 if(isPCI_SKIP(pc)) {
6298 // fprintf(stderr, "ends with skip\n");
6299 // pc->print(stderr,pc);
6301 pct=pic16_findNextInstruction(pc->next);
6302 LinkFlow_pCode(PCI(pc),PCI(pct));
6303 pct=pic16_findNextInstruction(pct->next);
6304 LinkFlow_pCode(PCI(pc),PCI(pct));
6308 if(isPCI_BRANCH(pc)) {
6309 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6311 /* handle GOTOs in jumptables */
6312 if ((jumptab_pre = pic16_getJumptabpCode (pc)) != NULL) {
6313 /* link to previous flow */
6314 //fprintf (stderr, "linked jumptable GOTO to predecessor %p\n", PCI(jumptab_pre)->pcflow);
6315 LinkFlow_pCode (PCI(jumptab_pre), PCI(pc));
6318 switch (PCI(pc)->op) {
6324 /* unconditional branches -- do not link to next instruction */
6325 //fprintf (stderr, "%s: flow ended by unconditional branch\n", __FUNCTION__);
6330 /* unconditional calls -- link to next instruction */
6331 //fprintf (stderr, "%s: flow ended by CALL\n", __FUNCTION__);
6332 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6343 /* conditional branches -- also link to next instruction */
6344 //fprintf (stderr, "%s: flow ended by conditional branch\n", __FUNCTION__);
6345 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6349 fprintf (stderr, "%s: unhandled op %u (%s)\n", __FUNCTION__, PCI(pc)->op , PCI(pc)->mnemonic);
6350 assert (0 && "unhandled branching instruction");
6354 //fprintf(stderr, "ends with branch\n ");
6355 //pc->print(stderr,pc);
6357 if(!(pcol && isPCOLAB(pcol))) {
6358 if((PCI(pc)->op != POC_RETLW)
6359 && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RCALL) && (PCI(pc)->op != POC_RETFIE) ) {
6361 /* continue if label is '$' which assembler knows how to parse */
6362 if(((PCI(pc)->pcop->type == PO_STR) && !strcmp(PCI(pc)->pcop->name, "$")))continue;
6364 if(pic16_pcode_verbose) {
6365 pc->print(stderr,pc);
6366 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
6372 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
6373 LinkFlow_pCode(PCI(pc),PCI(pct));
6375 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
6376 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
6378 // fprintf(stderr,"pic16_newpCodeOpLabel: key=%d, name=%s\n",pcol->key,(PCOP(pcol)->name)?(PCOP(pcol)->name):"<unknown>");
6384 //fprintf(stderr, "ends with non-branching instruction:\n");
6385 //pc->print(stderr,pc);
6387 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6393 //fprintf(stderr, "ends with unknown\n");
6394 //pc->print(stderr,pc);
6398 //fprintf(stderr, "ends with nothing: ERROR\n");
6402 /*-----------------------------------------------------------------*/
6403 /*-----------------------------------------------------------------*/
6405 /*-----------------------------------------------------------------*/
6406 /*-----------------------------------------------------------------*/
6407 int pic16_isPCinFlow(pCode *pc, pCode *pcflow)
6413 if((!isPCI(pc) && !isPCAD(pc)) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
6416 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
6426 /*-----------------------------------------------------------------*/
6427 /* insertBankSwitch - inserts a bank switch statement in the */
6428 /* assembly listing */
6430 /* position == 0: insert before */
6431 /* position == 1: insert after pc */
6432 /* position == 2: like 0 but previous was a skip instruction */
6433 /*-----------------------------------------------------------------*/
6434 pCodeOp *pic16_popGetLabel(unsigned int key);
6435 extern int pic16_labelOffset;
6437 static void insertBankSwitch(unsigned char position, pCode *pc)
6444 /* emit BANKSEL [symbol] */
6447 new_pc = pic16_newpCodeAsmDir("BANKSEL", "%s", pic16_get_op_from_instruction(PCI(pc)));
6449 // position = 0; // position is always before (sanity check!)
6452 fprintf(stderr, "%s:%d: inserting bank switch (pos: %d)\n", __FUNCTION__, __LINE__, position);
6453 pc->print(stderr, pc);
6458 /* insert the bank switch after this pc instruction */
6459 pCode *pcnext = pic16_findNextInstruction(pc);
6461 pic16_pCodeInsertAfter(pc, new_pc);
6462 if(pcnext)pc = pcnext;
6466 /* insert the bank switch BEFORE this pc instruction */
6467 pic16_pCodeInsertAfter(pc->prev, new_pc);
6472 pCode *pcnext, *pcprev, *npci, *ppc;
6474 int ofs1=0, ofs2=0, len=0;
6476 /* just like 0, but previous was a skip instruction,
6477 * so some care should be taken */
6479 pic16_labelOffset += 10000;
6480 tlbl = newiTempLabel(NULL);
6482 /* invert skip instruction */
6483 pcprev = pic16_findPrevInstruction(pc->prev);
6484 ipci = PCI(pcprev)->inverted_op;
6485 npci = pic16_newpCode(ipci, PCI(pcprev)->pcop);
6487 // fprintf(stderr, "%s:%d old OP: %d\tnew OP: %d\n", __FILE__, __LINE__, PCI(pcprev)->op, ipci);
6489 /* copy info from old pCode */
6490 ofs1 = ofs2 = sizeof( pCode ) + sizeof(PIC_OPCODE);
6491 len = sizeof(pCodeInstruction) - ofs1 - sizeof( char const * const *);
6492 ofs1 += strlen( PCI(pcprev)->mnemonic) + 1;
6493 ofs2 += strlen( PCI(npci)->mnemonic) + 1;
6494 memcpy(&PCI(npci)->from, &PCI(pcprev)->from, (char *)(&(PCI(npci)->pci_magic)) - (char *)(&(PCI(npci)->from)));
6495 PCI(npci)->op = PCI(pcprev)->inverted_op;
6497 /* unlink old pCode */
6499 ppc->next = pcprev->next;
6500 pcprev->next->prev = ppc;
6501 pic16_pCodeInsertAfter(ppc, npci);
6503 /* extra instructions to handle invertion */
6504 pcnext = pic16_newpCode(POC_BRA, pic16_popGetLabel(tlbl->key));
6505 pic16_pCodeInsertAfter(npci, pcnext);
6506 pic16_pCodeInsertAfter(pc->prev, new_pc);
6508 pcnext = pic16_newpCodeLabel(NULL,tlbl->key+100+pic16_labelOffset);
6509 pic16_pCodeInsertAfter(pc, pcnext);
6514 /* Move the label, if there is one */
6515 if(PCI(pc)->label) {
6516 // fprintf(stderr, "%s:%d: moving label due to bank switch directive src= 0x%p dst= 0x%p\n",
6517 // __FILE__, __LINE__, pc, new_pc);
6518 PCAD(new_pc)->pci.label = PCI(pc)->label;
6519 PCI(pc)->label = NULL;
6524 /*-----------------------------------------------------------------*/
6525 /*int compareBankFlow - compare the banking requirements between */
6527 /*-----------------------------------------------------------------*/
6528 static int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
6531 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
6534 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
6537 if(pcflow->firstBank == -1)
6541 if(pcflowLink->pcflow->firstBank == -1) {
6542 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
6543 pcflowLink->pcflow->to :
6544 pcflowLink->pcflow->from);
6545 return compareBankFlow(pcflow, pctl, toORfrom);
6549 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
6552 pcflowLink->bank_conflict++;
6553 pcflowLink->pcflow->FromConflicts++;
6554 pcflow->ToConflicts++;
6557 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
6560 pcflowLink->bank_conflict++;
6561 pcflowLink->pcflow->ToConflicts++;
6562 pcflow->FromConflicts++;
6566 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
6567 pcflowLink->pcflow->pc.seq,
6568 pcflowLink->pcflow->FromConflicts,
6569 pcflowLink->pcflow->ToConflicts);
6576 /*-----------------------------------------------------------------*/
6577 /*-----------------------------------------------------------------*/
6578 static void DumpFlow(pBlock *pb)
6582 pCodeFlowLink *pcfl;
6585 fprintf(stderr,"Dump flow \n");
6586 pb->pcHead->print(stderr, pb->pcHead);
6588 pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6589 pcflow->print(stderr,pcflow);
6591 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6593 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6595 if(!isPCFL(pcflow)) {
6596 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
6599 fprintf(stderr,"dumping: ");
6600 pcflow->print(stderr,pcflow);
6601 FlowStats(PCFL(pcflow));
6603 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6605 pc = PCODE(pcfl->pcflow);
6607 fprintf(stderr, " from seq %d:\n",pc->seq);
6609 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
6610 pc->print(stderr,pc);
6615 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6617 pc = PCODE(pcfl->pcflow);
6619 fprintf(stderr, " to seq %d:\n",pc->seq);
6621 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
6622 pc->print(stderr,pc);
6631 /*-----------------------------------------------------------------*/
6632 /*-----------------------------------------------------------------*/
6633 static int OptimizepBlock(pBlock *pb)
6638 if(!pb || !peepOptimizing)
6641 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
6643 for(pc = pb->pcHead; pc; pc = pc->next)
6644 matches += pic16_pCodePeepMatchRule(pc);
6647 pc = pic16_findNextInstruction(pb->pcHead);
6655 if(pic16_pCodePeepMatchRule(pc)) {
6660 pc = pic16_findNextInstruction(pcprev->next);
6662 pc = pic16_findNextInstruction(pb->pcHead);
6664 pc = pic16_findNextInstruction(pc->next);
6668 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
6673 /*-----------------------------------------------------------------*/
6674 /*-----------------------------------------------------------------*/
6675 static pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
6679 for(pc = pcs; pc; pc = pc->next) {
6681 if(((pc->type == PC_OPCODE) || (pc->type == PC_INLINE) || (pc->type == PC_ASMDIR)) &&
6683 (PCI(pc)->pcop->type == PO_LABEL) &&
6684 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
6692 /*-----------------------------------------------------------------*/
6693 /*-----------------------------------------------------------------*/
6694 static void exchangeLabels(pCodeLabel *pcl, pCode *pc)
6701 (PCI(pc)->pcop->type == PO_LABEL)) {
6703 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6705 // fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
6706 // if(pcol->pcop.name)
6707 // Safe_free(pcol->pcop.name);
6709 /* If the key is negative, then we (probably) have a label to
6710 * a function and the name is already defined */
6713 sprintf(s=buffer,"_%05d_DS_",pcl->key);
6717 //sprintf(buffer,"_%05d_DS_",pcl->key);
6719 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
6721 pcol->pcop.name = Safe_strdup(s);
6722 pcol->key = pcl->key;
6723 //pc->print(stderr,pc);
6730 /*-----------------------------------------------------------------*/
6731 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
6732 /* pCode chain if they're not used. */
6733 /*-----------------------------------------------------------------*/
6734 static void pBlockRemoveUnusedLabels(pBlock *pb)
6736 pCode *pc; pCodeLabel *pcl;
6741 for(pc = pb->pcHead; (pc=pic16_findNextInstruction(pc->next)) != NULL; ) {
6743 pBranch *pbr = PCI(pc)->label;
6744 if(pbr && pbr->next) {
6745 pCode *pcd = pb->pcHead;
6747 // fprintf(stderr, "multiple labels\n");
6748 // pc->print(stderr,pc);
6753 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
6754 //fprintf(stderr,"Used by:\n");
6755 //pcd->print(stderr,pcd);
6757 exchangeLabels(PCL(pbr->pc),pcd);
6766 for(pc = pb->pcHead; pc; pc = pc->next) {
6768 if(isPCL(pc)) // pc->type == PC_LABEL)
6770 else if (isPCI(pc) && PCI(pc)->label) //((pc->type == PC_OPCODE) && PCI(pc)->label)
6771 pcl = PCL(PCI(pc)->label->pc);
6774 // fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6776 /* This pCode is a label, so search the pBlock to see if anyone
6779 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))
6781 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
6782 /* Couldn't find an instruction that refers to this label
6783 * So, unlink the pCode label from it's pCode chain
6784 * and destroy the label */
6785 // fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6787 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
6788 if(pc->type == PC_LABEL) {
6789 pic16_unlinkpCode(pc);
6790 pCodeLabelDestruct(pc);
6792 unlinkpCodeFromBranch(pc, PCODE(pcl));
6793 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
6794 Safe_free(pc->label);
6804 /*-----------------------------------------------------------------*/
6805 /* pic16_pBlockMergeLabels - remove the pCode labels from the pCode */
6806 /* chain and put them into pBranches that are */
6807 /* associated with the appropriate pCode */
6809 /*-----------------------------------------------------------------*/
6810 void pic16_pBlockMergeLabels(pBlock *pb)
6813 pCode *pc, *pcnext=NULL;
6818 /* First, Try to remove any unused labels */
6819 //pBlockRemoveUnusedLabels(pb);
6821 /* Now loop through the pBlock and merge the labels with the opcodes */
6824 // for(pc = pb->pcHead; pc; pc = pc->next) {
6827 pCode *pcn = pc->next;
6829 if(pc->type == PC_LABEL) {
6831 // fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
6832 // fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
6834 if((pcnext = pic16_findNextInstruction(pc) )) {
6836 // pcnext->print(stderr, pcnext);
6838 // Unlink the pCode label from it's pCode chain
6839 pic16_unlinkpCode(pc);
6841 // fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
6842 // And link it into the instruction's pBranch labels. (Note, since
6843 // it's possible to have multiple labels associated with one instruction
6844 // we must provide a means to accomodate the additional labels. Thus
6845 // the labels are placed into the singly-linked list "label" as
6846 // opposed to being a single member of the pCodeInstruction.)
6848 //_ALLOC(pbr,sizeof(pBranch));
6850 pbr = Safe_calloc(1,sizeof(pBranch));
6854 PCI(pcnext)->label = pic16_pBranchAppend(PCI(pcnext)->label,pbr);
6857 if(pic16_pcode_verbose)
6858 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
6860 } else if(pc->type == PC_CSOURCE) {
6862 /* merge the source line symbolic info into the next instruction */
6863 if((pcnext = pic16_findNextInstruction(pc) )) {
6865 // Unlink the pCode label from it's pCode chain
6866 pic16_unlinkpCode(pc);
6867 PCI(pcnext)->cline = PCCS(pc);
6868 //fprintf(stderr, "merging CSRC\n");
6869 //genericPrint(stderr,pcnext);
6875 pBlockRemoveUnusedLabels(pb);
6879 /*-----------------------------------------------------------------*/
6880 /*-----------------------------------------------------------------*/
6881 static int OptimizepCode(char dbName)
6883 #define MAX_PASSES 4
6892 DFPRINTF((stderr," Optimizing pCode\n"));
6896 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6897 if('*' == dbName || getpBlock_dbName(pb) == dbName)
6898 matches += OptimizepBlock(pb);
6901 while(matches && ++passes < MAX_PASSES);
6908 const char *pic16_pCodeOpType(pCodeOp *pcop);
6909 const char *pic16_pCodeOpSubType(pCodeOp *pcop);
6912 /*-----------------------------------------------------------------*/
6913 /* pic16_popCopyGPR2Bit - copy a pcode operator */
6914 /*-----------------------------------------------------------------*/
6916 pCodeOp *pic16_popCopyGPR2Bit(pCodeOp *pc, int bitval)
6920 // fprintf(stderr, "%s:%d pc type: %s\tname: %s\n", __FILE__, __LINE__, pic16_pCodeOpType(pc), pc->name);
6923 pcop = pic16_newpCodeOpBit(pc->name, bitval, 0, pc->type);
6925 if(PCOR(pc)->r)pcop = pic16_newpCodeOpBit(PCOR(pc)->r->name, bitval, 0, pc->type);
6928 assert(pcop != NULL);
6930 if( !( (pcop->type == PO_LABEL) ||
6931 (pcop->type == PO_LITERAL) ||
6932 (pcop->type == PO_STR) ))
6933 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
6934 PCOR(pcop)->r->wasUsed = 1;
6935 PCOR(pcop)->instance = PCOR(pc)->instance;
6941 /*----------------------------------------------------------------------*
6942 * pic16_areRegsSame - check to see if the names of two registers match *
6943 *----------------------------------------------------------------------*/
6944 int pic16_areRegsSame(regs *r1, regs *r2)
6946 if(!strcmp(r1->name, r2->name))return 1;
6952 /*-----------------------------------------------------------------*/
6953 /*-----------------------------------------------------------------*/
6954 static void pic16_FixRegisterBanking(pBlock *pb)
6958 regs *reg, *prevreg;
6959 unsigned char flag=0;
6964 pc = pic16_findNextpCode(pb->pcHead, PC_OPCODE);
6967 /* loop through all of the flow blocks with in one pblock */
6969 // fprintf(stderr,"%s:%d: Register banking\n", __FUNCTION__, __LINE__);
6973 /* at this point, pc should point to a PC_FLOW object */
6974 /* for each flow block, determine the register banking
6978 /* if label, then might come from other point, force banksel */
6979 if(isPCL(pc))prevreg = NULL;
6981 if(!isPCI(pc))goto loop;
6983 if(PCI(pc)->label)prevreg = NULL;
6985 if(PCI(pc)->is2MemOp)goto loop;
6987 /* if goto, then force banksel */
6988 // if(PCI(pc)->op == POC_GOTO)prevreg = NULL;
6990 reg = pic16_getRegFromInstruction(pc);
6993 pc->print(stderr, pc);
6994 fprintf(stderr, "reg = %p\n", reg);
6997 fprintf(stderr, "%s:%d: %s %d\n",__FUNCTION__, __LINE__, reg->name, reg->rIdx);
6998 fprintf(stderr, "addr = 0x%03x, bit=%d\tfix=%d\n",
6999 reg->address,reg->isBitField, reg->isFixed);
7003 /* now make some tests to make sure that instruction needs bank switch */
7005 /* if no register exists, and if not a bit opcode goto loop */
7007 if(!(PCI(pc)->pcop && PCI(pc)->pcop->type == PO_GPR_BIT))goto loop;
7010 if(isPCI_SKIP(pc)) {
7011 // fprintf(stderr, "instruction is SKIP instruction\n");
7014 if(reg && isACCESS_BANK(reg))goto loop;
7016 if(!isBankInstruction(pc))goto loop;
7018 if(isPCI_LIT(pc))goto loop;
7020 if(PCI(pc)->op == POC_CALL)goto loop;
7022 /* Examine the instruction before this one to make sure it is
7023 * not a skip type instruction */
7024 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
7026 flag = 0; /* add before this instruction */
7028 /* if previous instruction is a skip one, then set flag
7029 * to 2 and call insertBankSwitch */
7030 if(pcprev && isPCI_SKIP(pcprev)) {
7035 if(pic16_options.opt_banksel>0) {
7036 char op1[128], op2[128];
7039 strcpy(op1, pic16_get_op_from_instruction(PCI(pc)));
7040 strcpy(op2, pic16_get_op_from_instruction(PCI(pcprev)));
7041 if(!strcmp(op1, op2))goto loop;
7045 insertBankSwitch(flag, pc);
7047 // fprintf(stderr, "BANK SWITCH inserted\n");
7055 /** ADDITIONS BY RAPHAEL NEIDER, 2004-11-16: GOTO OPTIMIZATIONS **/
7057 /* Returns the (maximum of the) number of bytes used by the specified pCode. */
7058 int instrSize (pCode *pc)
7063 if (!PCAD(pc)->directive || strlen (PCAD(pc)->directive) < 3) return 0;
7064 return 4; // assumes only regular instructions using <= 4 bytes
7067 if (isPCI(pc)) return PCI(pc)->isize;
7072 /* Returns 1 if pc is referenced by the given label (either
7073 * pc is the label itself or is an instruction with an attached
7075 * Returns 0 if pc is not preceeded by the specified label.
7077 int isLabel (pCode *pc, char *label)
7081 // label attached to the pCode?
7082 if (isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO) {
7083 pBranch *lab = NULL;
7084 lab = PCI(pc)->label;
7087 if (isPCL(lab->pc) && strcmp(PCL(lab->pc)->label, label) == 0) {
7094 // is inline assembly label?
7095 if (isPCAD(pc) && PCAD(pc)->directive == NULL && PCAD(pc)->arg) {
7096 // do not compare trailing ':'
7097 if (strncmp (PCAD(pc)->arg, label, strlen (label)) == 0) {
7104 if (strcmp(PCL(pc)->label,label) == 0) {
7109 // no label/no label attached/wrong label(s)
7113 /* Returns the distance to the given label in terms of words.
7114 * Labels are searched only within -max .. max words from pc.
7115 * Returns max if the label could not be found or
7116 * its distance from pc in (-max..+max).
7118 int findpCodeLabel (pCode *pc, char *label, int max, pCode **target) {
7119 int dist = instrSize(pc);
7123 while (dist < max && curr && !isLabel (curr, label)) {
7125 dist += instrSize(curr); // sizeof (instruction)
7127 if (curr && dist < max) {
7128 if (target != NULL) *target = curr;
7133 curr = pic16_findNextInstruction (pc->next);
7135 while (dist < max && curr && !isLabel (curr, label)) {
7136 dist += instrSize(curr); // sizeof (instruction)
7139 if (curr && dist < max) {
7140 if (target != NULL) *target = curr;
7144 if (target != NULL) *target = NULL;
7148 /* Returns -1 if pc does NOT denote an instruction like
7150 * Otherwise we return
7151 * (a) 0x10 + i for BTFSS
7152 * (b) 0x00 + i for BTFSC
7154 int isSkipOnStatus (pCode *pc)
7158 if (!pc || !isPCI(pc)) return -1;
7159 if (PCI(pc)->op == POC_BTFSS) res = 0x10;
7160 else if (PCI(pc)->op == POC_BTFSC) res = 0x00;
7163 pcop = PCI(pc)->pcop;
7165 if (pcop->type == PO_STATUS || (pcop->type == PO_GPR_BIT && strcmp(pcop->name, "STATUS") == 0)) {
7166 return res + ((pCodeOpRegBit *)pcop)->bit;
7172 /* Returns 1 if pc is one of BC, BZ, BOV, BN, BNC, BNZ, BNOV or BNN,
7173 * returns 0 otherwise. */
7174 int isConditionalBranch (pCode *pc)
7176 if (!pc || !isPCI_BRANCH(pc)) return 0;
7178 switch (PCI(pc)->op) {
7196 /* Returns 1 if pc has a label attached to it.
7197 * This can be either a label stored in the pCode itself (.label)
7198 * or a label making up its own pCode preceding this pc.
7199 * Returns 0 if pc cannot be reached directly via a label.
7201 int hasNoLabel (pCode *pc)
7206 // are there any label pCodes between pc and the previous instruction?
7207 prev = pic16_findPrevInstruction (pc->prev);
7208 while (pc && pc != prev) {
7209 // pCode with attached label?
7210 if ((isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO)
7211 && PCI(pc)->label) {
7214 // is inline assembly label?
7215 if (isPCAD(pc) && PCAD(pc)->directive == NULL) return 0;
7216 if (isPCW(pc) && PCW(pc)->label) return 0;
7219 if (isPCL(pc)) return 0;
7228 static void pic16_InsertCommentAfter (pCode *pc, const char *fmt, ...) {
7233 vsprintf (buf, fmt, va);
7236 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(buf));
7239 /* Replaces the old pCode with the new one, moving the labels,
7240 * C source line and probably flow information to the new pCode.
7242 void pic16_pCodeReplace (pCode *oldPC, pCode *newPC) {
7243 if (!oldPC || !newPC || !isPCI(oldPC) || !isPCI(newPC))
7246 /* first move all labels from old to new */
7247 PCI(newPC)->label = pic16_pBranchAppend (PCI(oldPC)->label, PCI(newPC)->label);
7248 PCI(oldPC)->label = NULL;
7251 /* move C source line (if possible) */
7252 if (PCI(oldPC)->cline && !PCI(newPC)->cline)
7253 PCI(newPC)->cline = PCI(oldPC)->cline;
7256 /* keep flow information intact */
7257 newPC->seq = oldPC->seq;
7258 PCI(newPC)->pcflow = PCI(oldPC)->pcflow;
7259 if (PCI(newPC)->pcflow && PCI(newPC)->pcflow->end == oldPC) {
7260 PCI(newPC)->pcflow->end = newPC;
7263 /* insert a comment stating which pCode has been replaced */
7265 if (pic16_pcode_verbose || pic16_debug_verbose) {
7267 pic16_pCode2str (pc_str, 256, oldPC);
7268 pic16_InsertCommentAfter (oldPC->prev, "%s: replaced %s", __FUNCTION__, pc_str);
7272 /* insert new pCode into pBlock */
7273 pic16_pCodeInsertAfter (oldPC, newPC);
7274 pic16_unlinkpCode (oldPC);
7276 /* destruct replaced pCode */
7277 oldPC->destruct (oldPC);
7280 /* Returns the inverted conditional branch (if any) or NULL.
7281 * pcop must be set to the new jump target.
7283 pCode *getNegatedBcc (pCode *bcc, pCodeOp *pcop)
7287 if (!bcc || !isPCI(bcc)) return NULL;
7289 switch (PCI(bcc)->op) {
7290 case POC_BC: newBcc = pic16_newpCode (POC_BNC , pcop); break;
7291 case POC_BZ: newBcc = pic16_newpCode (POC_BNZ , pcop); break;
7292 case POC_BOV: newBcc = pic16_newpCode (POC_BNOV, pcop); break;
7293 case POC_BN: newBcc = pic16_newpCode (POC_BNN , pcop); break;
7294 case POC_BNC: newBcc = pic16_newpCode (POC_BC , pcop); break;
7295 case POC_BNZ: newBcc = pic16_newpCode (POC_BZ , pcop); break;
7296 case POC_BNOV: newBcc = pic16_newpCode (POC_BOV , pcop); break;
7297 case POC_BNN: newBcc = pic16_newpCode (POC_BN , pcop); break;
7304 #define MAX_DIST_GOTO 0x7FFFFFFF
7305 #define MAX_DIST_BRA 1020 // maximum offset (in bytes) possible with BRA
7306 #define MAX_DIST_BCC 120 // maximum offset (in bytes) possible with Bcc
7307 #define MAX_JUMPCHAIN_DEPTH 16 // number of GOTOs to follow in resolveJumpChain() (to prevent endless loops)
7308 #define IS_GOTO(arg) ((arg) && isPCI(arg) && (PCI(arg)->op == POC_GOTO || PCI(arg)->op == POC_BRA))
7310 /* Follows GOTO/BRA instructions to their target instructions, stores the
7311 * final destination (not a GOTO or BRA instruction) in target and returns
7312 * the distance from the original pc to *target.
7314 int resolveJumpChain (pCode *pc, pCode **target, pCodeOp **pcop) {
7317 pCodeOp *lastPCOP = NULL;
7321 //fprintf (stderr, "%s:%d: -=-", __FUNCTION__, __LINE__);
7323 /* only follow unconditional branches, except for the initial pCode (which may be a conditional branch) */
7324 while (curr && (last != curr) && (depth++ < MAX_JUMPCHAIN_DEPTH) && isPCI(curr)
7325 && (PCI(curr)->op == POC_GOTO || PCI(curr)->op == POC_BRA || (curr == pc && isConditionalBranch(curr)))) {
7327 lastPCOP = PCI(curr)->pcop;
7328 dist = findpCodeLabel (pc, PCI(curr)->pcop->name, MAX_DIST_GOTO, &curr);
7329 //fprintf (stderr, "last:%p, curr:%p, label:%s\n", last, curr, PCI(last)->pcop->name);
7332 if (target) *target = last;
7333 if (pcop) *pcop = lastPCOP;
7337 /* Returns pc if it is not a OPT_JUMPTABLE_BEGIN INFO pCode.
7338 * Otherwise the first pCode after the jumptable (after
7339 * the OPT_JUMPTABLE_END tag) is returned.
7341 pCode *skipJumptables (pCode *pc, int *isJumptable)
7344 if (!pc) return NULL;
7346 while (pc->type == PC_INFO && PCINF(pc)->type == INF_OPTIMIZATION && PCOO(PCINF(pc)->oper1)->type == OPT_JUMPTABLE_BEGIN) {
7348 //fprintf (stderr, "SKIPPING jumptable\n");
7350 //pc->print(stderr, pc);
7352 } while (pc && (pc->type != PC_INFO || PCINF(pc)->type != INF_OPTIMIZATION
7353 || PCOO(PCINF(pc)->oper1)->type != OPT_JUMPTABLE_END));
7354 //fprintf (stderr, "<<JUMPTAB:\n");
7355 // skip OPT_END as well
7356 if (pc) pc = pc->next;
7362 pCode *pic16_findNextInstructionSkipJumptables (pCode *pc, int *isJumptable)
7366 while (pc && !isPCI(pc) && !isPCAD(pc) && !isPCW(pc)) {
7367 // set pc to the first pCode after a jumptable, leave pc untouched otherwise
7368 pc = skipJumptables (pc, &isJumptab);
7370 // pc is the first pCode after the jumptable
7373 // pc has not been changed by skipJumptables()
7381 /* Turn GOTOs into BRAs if distance between GOTO and label
7382 * is less than 1024 bytes.
7384 * This method is especially useful if GOTOs after BTFS[SC]
7385 * can be turned into BRAs as GOTO would cost another NOP
7388 void pic16_OptimizeJumps ()
7391 pCode *pc_prev = NULL;
7392 pCode *pc_next = NULL;
7395 int change, iteration, isJumptab;
7398 int opt=0, toofar=0, opt_cond = 0, cond_toofar=0, opt_reorder = 0, opt_gotonext = 0, opt_gotochain = 0;
7400 if (!the_pFile) return;
7402 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7404 for (pb = the_pFile->pbHead; pb != NULL; pb = pb->next) {
7405 int matchedInvertRule = 1;
7408 //fprintf (stderr, "%s:%d: iterating over pBlock %p\n", __FUNCTION__, __LINE__, pb);
7410 pc = pic16_findNextInstruction (pb->pcHead);
7413 pc_next = pic16_findNextInstructionSkipJumptables (pc->next, &isJumptab);
7415 // skip jumptable, i.e. start over with no pc_prev!
7421 /* (1) resolve chained jumps
7422 * Do not perform this until pattern (4) is no longer present! Otherwise we will
7423 * (a) leave dead code in and
7424 * (b) skip over the dead code with an (unneccessary) jump.
7426 if (!matchedInvertRule && (IS_GOTO(pc) || isConditionalBranch(pc))) {
7427 pCodeOp *lastTargetOp = NULL;
7428 int newDist = resolveJumpChain (pc, &target, &lastTargetOp);
7429 int maxDist = MAX_DIST_BCC;
7430 if (PCI(pc)->op == POC_BRA) maxDist = MAX_DIST_BRA;
7431 if (PCI(pc)->op == POC_GOTO) maxDist = MAX_DIST_GOTO;
7433 /* be careful NOT to make the jump instruction longer (might break previously shortened jumps!) */
7434 if (lastTargetOp && newDist <= maxDist && lastTargetOp != PCI(pc)->pcop
7435 && strcmp (lastTargetOp->name, PCI(pc)->pcop->name) != 0) {
7436 //fprintf (stderr, "(1) ");pc->print(stderr, pc); fprintf (stderr, " --> %s\n", lastTargetOp->name);
7437 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(1) jump chain resolved")); }
7438 PCI(pc)->pcop->name = lastTargetOp->name;
7447 int condBraType = isSkipOnStatus(pc_prev);
7448 label = PCI(pc)->pcop->name;
7449 dist = findpCodeLabel(pc, label, MAX_DIST_BRA, &target);
7450 if (dist < 0) dist = -dist;
7451 //fprintf (stderr, "distance: %d (", dist); pc->print(stderr, pc);fprintf (stderr, ")\n");
7455 /* (2) remove "GOTO label; label:" */
7456 if (isLabel (pc_next, label)) {
7457 //fprintf (stderr, "(2) GOTO next instruction: ");pc->print(stderr, pc);fprintf (stderr, " --> ");pc_next->print(stderr, pc_next); fprintf(stderr, "\n");
7458 // first remove all preceeding SKIP instructions
7459 while (pc_prev && isPCI_SKIP(pc_prev)) {
7460 // attach labels on this instruction to pc_next
7461 //fprintf (stderr, "(2) preceeding SKIP removed: ");pc_prev->print(stderr, pc_prev);fprintf(stderr, "\n");
7462 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc_prev)->label, PCI(pc_next)->label);
7463 PCI(pc_prev)->label = NULL;
7464 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(2) SKIP removed")); }
7465 pic16_unlinkpCode (pc_prev);
7466 pc_prev = pic16_findPrevInstruction (pc);
7468 // now remove the redundant goto itself
7469 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pc_next)->label);
7470 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP("(2) GOTO next instruction removed")); }
7471 pic16_unlinkpCode (pc);
7472 pc = pic16_findPrevInstruction(pc_next->prev);
7473 isHandled = 1; // do not perform further optimizations
7479 /* (3) turn BTFSx STATUS,i; GOTO label into Bcc label if possible */
7480 if (!isHandled && condBraType != -1 && hasNoLabel(pc)) {
7481 if (dist < MAX_DIST_BCC) {
7483 switch (condBraType) {
7484 case 0x00: bcc = pic16_newpCode (POC_BC, PCI(pc)->pcop);break;
7485 // no BDC on DIGIT CARRY available
7486 case 0x02: bcc = pic16_newpCode (POC_BZ, PCI(pc)->pcop);break;
7487 case 0x03: bcc = pic16_newpCode (POC_BOV, PCI(pc)->pcop);break;
7488 case 0x04: bcc = pic16_newpCode (POC_BN, PCI(pc)->pcop);break;
7489 case 0x10: bcc = pic16_newpCode (POC_BNC, PCI(pc)->pcop);break;
7490 // no BNDC on DIGIT CARRY available
7491 case 0x12: bcc = pic16_newpCode (POC_BNZ, PCI(pc)->pcop);break;
7492 case 0x13: bcc = pic16_newpCode (POC_BNOV, PCI(pc)->pcop);break;
7493 case 0x14: bcc = pic16_newpCode (POC_BNN, PCI(pc)->pcop);break;
7495 // no replacement possible
7500 // ATTENTION: keep labels attached to BTFSx!
7501 // HINT: GOTO is label free (checked above)
7502 //fprintf (stderr, "%s:%d: (3) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(bcc)->mnemonic, label);
7503 isHandled = 1; // do not perform further optimizations
7504 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(3) conditional branch introduced")); }
7505 pic16_pCodeReplace (pc_prev, bcc);
7512 //fprintf (stderr, "(%d, too far for Bcc)\n", dist);
7518 // (4) eliminate the following (common) tripel:
7520 // labels1: Bcc label2;
7521 // GOTO somewhere; ; <-- instruction referenced by pc
7523 // and replace it by
7524 // labels1: B#(cc) somewhere; ; #(cc) is the negated condition cc
7526 // ATTENTION: all labels pointing to "Bcc label2" must be attached
7527 // to <cont.> instead
7528 // ATTENTION: This optimization is only valid if <pred.> is
7529 // not a skip operation!
7530 // ATTENTION: somewhere must be within MAX_DIST_BCC bytes!
7531 // ATTENTION: no label may be attached to the GOTO instruction!
7532 if (isConditionalBranch(pc_prev)
7533 && (!isPCI_SKIP(pic16_findPrevInstruction(pc_prev->prev)))
7534 && (dist < MAX_DIST_BCC)
7535 && isLabel(pc_next,PCI(pc_prev)->pcop->name)
7536 && hasNoLabel(pc)) {
7537 pCode *newBcc = getNegatedBcc (pc_prev, PCI(pc)->pcop);
7540 //fprintf (stderr, "%s:%d: (4) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBcc)->mnemonic, label);
7541 isHandled = 1; // do not perform further optimizations
7542 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(4) conditional skipping branch inverted")); }
7543 pic16_pCodeReplace (pc_prev, newBcc);
7548 matchedInvertRule++;
7553 /* (5) now just turn GOTO into BRA */
7554 if (!isHandled && (PCI(pc)->op == POC_GOTO)) {
7555 if (dist < MAX_DIST_BRA) {
7556 pCode *newBra = pic16_newpCode (POC_BRA, PCI(pc)->pcop);
7557 //fprintf (stderr, "%s:%d: (5) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBra)->mnemonic, label);
7558 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc->prev, pic16_newpCodeCharP("(5) GOTO replaced by BRA")); }
7559 pic16_pCodeReplace (pc, newBra);
7564 //fprintf (stderr, "(%d, too far for BRA)\n", dist);
7567 } // if (!isHandled)
7574 pBlockRemoveUnusedLabels (pb);
7576 // This line enables goto chain resolution!
7577 if (matchedInvertRule > 1) matchedInvertRule = 1; else matchedInvertRule = 0;
7580 } while (change); /* fixpoint iteration per pBlock */
7583 // emit some statistics concerning goto-optimization
7585 if (pic16_debug_verbose || pic16_pcode_verbose) {
7586 fprintf (stderr, "optimize-goto:\n"
7587 "\t%5d GOTO->BRA; (%d GOTOs too far)\n"
7588 "\t%5d BTFSx, GOTO->Bcc (%d too far)\n"
7589 "\t%5d conditional \"skipping\" jumps inverted\n"
7590 "\t%5d GOTOs to next instruction removed\n"
7591 "\t%5d chained GOTOs resolved\n",
7592 opt, toofar, opt_cond, cond_toofar, opt_reorder, opt_gotonext, opt_gotochain);
7595 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7599 #undef MAX_JUMPCHAIN_DEPTH
7600 #undef MAX_DIST_GOTO
7604 /** END OF RAPHAEL NEIDER'S ADDITIONS **/
7606 static void pBlockDestruct(pBlock *pb)
7617 /*-----------------------------------------------------------------*/
7618 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
7619 /* name dbName and combine them */
7620 /* into one block */
7621 /*-----------------------------------------------------------------*/
7622 static void mergepBlocks(char dbName)
7625 pBlock *pb, *pbmerged = NULL,*pbn;
7627 pb = the_pFile->pbHead;
7629 //fprintf(stderr," merging blocks named %c\n",dbName);
7633 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
7634 if( getpBlock_dbName(pb) == dbName) {
7636 //fprintf(stderr," merged block %c\n",dbName);
7641 pic16_addpCode2pBlock(pbmerged, pb->pcHead);
7642 /* pic16_addpCode2pBlock doesn't handle the tail: */
7643 pbmerged->pcTail = pb->pcTail;
7645 pb->prev->next = pbn;
7647 pbn->prev = pb->prev;
7652 //pic16_printpBlock(stderr, pbmerged);
7659 /*-----------------------------------------------------------------*/
7660 /* AnalyzeFlow - Examine the flow of the code and optimize */
7662 /* level 0 == minimal optimization */
7663 /* optimize registers that are used only by two instructions */
7664 /* level 1 == maximal optimization */
7665 /* optimize by looking at pairs of instructions that use the */
7667 /*-----------------------------------------------------------------*/
7669 static void AnalyzeFlow(int level)
7671 static int times_called=0;
7675 /* remove unused allocated registers before exiting */
7676 pic16_RemoveUnusedRegisters();
7681 /* if this is not the first time this function has been called,
7682 * then clean up old flow information */
7683 if(times_called++) {
7684 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7686 pic16_RegsUnMapLiveRanges();
7690 /* Phase 2 - Flow Analysis - Register Banking
7692 * In this phase, the individual flow blocks are examined
7693 * and register banking is fixed.
7697 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7698 pic16_FixRegisterBanking(pb);
7701 /* Phase 2 - Flow Analysis
7703 * In this phase, the pCode is partition into pCodeFlow
7704 * blocks. The flow blocks mark the points where a continuous
7705 * stream of instructions changes flow (e.g. because of
7706 * a call or goto or whatever).
7709 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7710 pic16_BuildFlow(pb);
7713 /* Phase 2 - Flow Analysis - linking flow blocks
7715 * In this phase, the individual flow blocks are examined
7716 * to determine their order of excution.
7719 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7723 if (pic16_options.opt_flags & OF_OPTIMIZE_DF) {
7724 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7725 pic16_createDF (pb);
7726 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
7727 pic16_vcg_dump_default (pb);
7729 //pic16_destructDF (pb);
7733 if (0) releaseStack (); // releasing is costly...
7737 /* Phase 3 - Flow Analysis - Flow Tree
7739 * In this phase, the individual flow blocks are examined
7740 * to determine their order of execution.
7743 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7744 pic16_BuildFlowTree(pb);
7747 /* Phase x - Flow Analysis - Used Banks
7749 * In this phase, the individual flow blocks are examined
7750 * to determine the Register Banks they use
7754 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7759 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7760 pic16_pCodeRegMapLiveRanges(pb);
7762 pic16_RemoveUnusedRegisters();
7763 pic16_removeUnusedRegistersDF ();
7765 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
7766 pic16_pCodeRegOptimizeRegUsage(level);
7775 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7780 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7783 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7784 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7785 pcflow = pcflow->next) {
7786 FillFlow(PCFL(pcflow));
7791 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7794 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7795 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7796 pcflow = pcflow->next) {
7797 FlowStats(PCFL(pcflow));
7803 /* VR -- no need to analyze banking in flow, but left here :
7804 * 1. because it may be used in the future for other purposes
7805 * 2. because if omitted we'll miss some optimization done here
7807 * Perhaps I should rename it to something else
7810 /*-----------------------------------------------------------------*/
7811 /* pic16_AnalyzeBanking - Called after the memory addresses have been */
7812 /* assigned to the registers. */
7814 /*-----------------------------------------------------------------*/
7816 void pic16_AnalyzeBanking(void)
7820 /* Phase x - Flow Analysis - Used Banks
7822 * In this phase, the individual flow blocks are examined
7823 * to determine the Register Banks they use
7833 if(!the_pFile)return;
7835 if(!pic16_options.no_banksel) {
7836 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7837 // fprintf(stderr, "%s:%d: Fix register banking in pb= 0x%p\n", __FILE__, __LINE__, pb);
7838 pic16_FixRegisterBanking(pb);
7843 /*-----------------------------------------------------------------*/
7844 /* buildCallTree - Look at the flow and extract all of the calls. */
7845 /*-----------------------------------------------------------------*/
7846 static set *register_usage(pBlock *pb);
7848 static void buildCallTree(void )
7860 /* Now build the call tree.
7861 First we examine all of the pCodes for functions.
7862 Keep in mind that the function boundaries coincide
7863 with pBlock boundaries.
7865 The algorithm goes something like this:
7866 We have two nested loops. The outer loop iterates
7867 through all of the pBlocks/functions. The inner
7868 loop iterates through all of the pCodes for
7869 a given pBlock. When we begin iterating through
7870 a pBlock, the variable pc_fstart, pCode of the start
7871 of a function, is cleared. We then search for pCodes
7872 of type PC_FUNCTION. When one is encountered, we
7873 initialize pc_fstart to this and at the same time
7874 associate a new pBranch object that signifies a
7875 branch entry. If a return is found, then this signifies
7876 a function exit point. We'll link the pCodes of these
7877 returns to the matching pc_fstart.
7879 When we're done, a doubly linked list of pBranches
7880 will exist. The head of this list is stored in
7881 `the_pFile', which is the meta structure for all
7882 of the pCode. Look at the pic16_printCallTree function
7883 on how the pBranches are linked together.
7886 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7887 pCode *pc_fstart=NULL;
7888 for(pc = pb->pcHead; pc; pc = pc->next) {
7890 if(isPCI(pc) && pc_fstart) {
7891 if(PCI(pc)->is2MemOp) {
7892 r = pic16_getRegFromInstruction2(pc);
7893 if(r && !strcmp(r->name, "POSTDEC1"))
7894 PCF(pc_fstart)->stackusage++;
7896 r = pic16_getRegFromInstruction(pc);
7897 if(r && !strcmp(r->name, "PREINC1"))
7898 PCF(pc_fstart)->stackusage--;
7903 if (PCF(pc)->fname) {
7906 sprintf(buf, "%smain", port->fun_prefix);
7907 if(STRCASECMP(PCF(pc)->fname, buf) == 0) {
7908 //fprintf(stderr," found main \n");
7909 pb->cmemmap = NULL; /* FIXME do we need to free ? */
7913 pbr = Safe_calloc(1,sizeof(pBranch));
7914 pbr->pc = pc_fstart = pc;
7917 the_pFile->functions = pic16_pBranchAppend(the_pFile->functions,pbr);
7919 // Here's a better way of doing the same:
7920 addSet(&pb->function_entries, pc);
7923 // Found an exit point in a function, e.g. return
7924 // (Note, there may be more than one return per function)
7926 pBranchLink(PCF(pc_fstart), PCF(pc));
7928 addSet(&pb->function_exits, pc);
7930 } else if(isCALL(pc)) {
7931 addSet(&pb->function_calls,pc);
7938 /* This is not needed because currently all register used
7939 * by a function are stored in stack -- VR */
7941 /* Re-allocate the registers so that there are no collisions
7942 * between local variables when one function call another */
7945 // pic16_deallocateAllRegs();
7947 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7955 /*-----------------------------------------------------------------*/
7956 /* pic16_AnalyzepCode - parse the pCode that has been generated and form */
7957 /* all of the logical connections. */
7959 /* Essentially what's done here is that the pCode flow is */
7961 /*-----------------------------------------------------------------*/
7963 void pic16_AnalyzepCode(char dbName)
7974 /* Phase 1 - Register allocation and peep hole optimization
7976 * The first part of the analysis is to determine the registers
7977 * that are used in the pCode. Once that is done, the peep rules
7978 * are applied to the code. We continue to loop until no more
7979 * peep rule optimizations are found (or until we exceed the
7980 * MAX_PASSES threshold).
7982 * When done, the required registers will be determined.
7988 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
7989 //fprintf(stderr," Analyzing pCode: PASS #%d\n",i+1);
7991 /* First, merge the labels with the instructions */
7992 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7993 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
7995 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
7996 //fprintf(stderr," analyze and merging block %c\n",dbName);
7997 pic16_pBlockMergeLabels(pb);
8000 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName));
8005 changes = OptimizepCode(dbName);
8008 } while(changes && (i++ < MAX_PASSES));
8015 /* convert a series of movff's of local regs to stack, with a single call to
8016 * a support functions which does the same thing via loop */
8017 static void pic16_convertLocalRegs2Support(pCode *pcstart, pCode *pcend, int count, regs *r, int entry)
8021 char *fname[]={"__lr_store", "__lr_restore"};
8023 // pc = pic16_newpCode(POC_CALL, pic16_popGetFromString( (entry?fname[0]:fname[1]) ));
8025 pct = pic16_findNextInstruction(pcstart->next);
8028 pct = pc->next; //pic16_findNextInstruction(pc->next);
8029 // pc->print(stderr, pc);
8030 if(isPCI(pc) && PCI(pc)->label) {
8031 pbr = PCI(pc)->label;
8032 while(pbr && pbr->pc) {
8033 PCI(pcstart)->label = pic16_pBranchAppend(PCI(pcstart)->label, pbr);
8037 // pc->print(stderr, pc);
8039 pc->prev->next = pct;
8040 pct->prev = pc->prev;
8044 } while ((pc) && (pc != pcend));
8046 /* unlink movff instructions */
8047 pcstart->next = pcend;
8048 pcend->prev = pcstart;
8052 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8053 // pic16_popCopyReg(&pic16_pc_fsr0l), pic16_popCopyReg(pic16_framepnt_lo)))); pc = pct;
8056 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_LFSR, pic16_popGetLit2(0, pic16_popGetWithString(r->name)))); pc = pct;
8057 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_MOVLW, pic16_popGetLit( count ))); pc = pct;
8058 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_CALL, pic16_popGetWithString( fname[ (entry==1?0:1) ] ))); pc = pct;
8061 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8062 // pic16_popCopyReg(pic16_framepnt_lo), pic16_popCopyReg(&pic16_pc_fsr0l)))); pc = pct;
8069 sym = newSymbol( fname[ entry?0:1 ], 0 );
8070 strcpy(sym->rname, fname[ entry?0:1 ]);
8071 checkAddSym(&externs, sym);
8073 // fprintf(stderr, "%s:%d adding extern symbol %s in externs\n", __FILE__, __LINE__, fname[ entry?0:1 ]);
8078 /*-----------------------------------------------------------------*/
8079 /* OptimizeLocalRegs - turn sequence of MOVFF instructions for */
8080 /* local registers to a support function call */
8081 /*-----------------------------------------------------------------*/
8082 void pic16_OptimizeLocalRegs(void)
8087 pCodeOpLocalReg *pclr;
8090 regs *r, *lastr=NULL, *firstr=NULL;
8091 pCode *pcstart=NULL, *pcend=NULL;
8096 * local_regs begin mark
8097 * MOVFF r0x01, POSTDEC1
8098 * MOVFF r0x02, POSTDEC1
8101 * MOVFF r0x0n, POSTDEC1
8102 * local_regs end mark
8104 * convert the above to the below:
8105 * MOVLW starting_register_index
8107 * MOVLW register_count
8108 * call __save_registers_in_stack
8114 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8115 inRegCount = regCount = 0;
8116 firstr = lastr = NULL;
8117 for(pc = pb->pcHead; pc; pc = pc->next) {
8119 /* hold current function name */
8120 if(pc && isPCF(pc))curFunc = PCF(pc)->fname;
8122 if(pc && (pc->type == PC_INFO)) {
8125 if(pci->type == INF_LOCALREGS) {
8126 pclr = PCOLR(pci->oper1);
8128 if((pclr->type == LR_ENTRY_BEGIN)
8129 || (pclr->type == LR_ENTRY_END))inEntry = 1;
8132 switch(pclr->type) {
8133 case LR_ENTRY_BEGIN:
8135 inRegCount = 1; regCount = 0;
8136 pcstart = pc; //pic16_findNextInstruction(pc->next);
8137 firstr = lastr = NULL;
8143 pcend = pc; //pic16_findPrevInstruction(pc->prev);
8146 if(curFunc && inWparamList(curFunc+1)) {
8147 fprintf(stderr, "sdcc: %s: warning: disabling lr-support for functionn %s\n",
8151 pic16_convertLocalRegs2Support(pcstart, pcend, regCount,
8156 firstr = lastr = NULL;
8160 if(inRegCount == -1) {
8161 // fprintf(stderr, "%s:%d registers used [%s] %d\n", __FILE__, __LINE__, inEntry?"entry":"exit", regCount);
8167 if(isPCI(pc) && (PCI(pc)->op == POC_MOVFF) && (inRegCount == 1)) {
8169 r = pic16_getRegFromInstruction(pc);
8171 r = pic16_getRegFromInstruction2(pc);
8172 if(r && (r->type == REG_GPR) && (r->pc_type == PO_GPR_TEMP)) {
8173 if(!firstr)firstr = r;
8175 // fprintf(stderr, "%s:%d\t%s\t%i\t%d/%d\n", __FILE__, __LINE__, r->name, r->rIdx);
8187 /*-----------------------------------------------------------------*/
8188 /* ispCodeFunction - returns true if *pc is the pCode of a */
8190 /*-----------------------------------------------------------------*/
8191 static bool ispCodeFunction(pCode *pc)
8194 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
8200 /*-----------------------------------------------------------------*/
8201 /* findFunction - Search for a function by name (given the name) */
8202 /* in the set of all functions that are in a pBlock */
8203 /* (note - I expect this to change because I'm planning to limit */
8204 /* pBlock's to just one function declaration */
8205 /*-----------------------------------------------------------------*/
8206 static pCode *findFunction(char *fname)
8213 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8215 pc = setFirstItem(pb->function_entries);
8218 if((pc->type == PC_FUNCTION) &&
8220 (strcmp(fname, PCF(pc)->fname)==0))
8223 pc = setNextItem(pb->function_entries);
8231 static void MarkUsedRegisters(set *regset)
8236 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
8237 // fprintf(stderr, "marking register = %s\t", r1->name);
8238 r2 = pic16_regWithIdx(r1->rIdx);
8239 // fprintf(stderr, "to register = %s\n", r2->name);
8245 static void pBlockStats(FILE *of, pBlock *pb)
8251 if(!pic16_pcode_verbose)return;
8253 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
8255 // for now just print the first element of each set
8256 pc = setFirstItem(pb->function_entries);
8258 fprintf(of,";entry: ");
8261 pc = setFirstItem(pb->function_exits);
8263 fprintf(of,";has an exit\n");
8267 pc = setFirstItem(pb->function_calls);
8269 fprintf(of,";functions called:\n");
8272 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8273 fprintf(of,"; %s\n",pic16_get_op_from_instruction(PCI(pc)));
8275 pc = setNextItem(pb->function_calls);
8279 r = setFirstItem(pb->tregisters);
8281 int n = elementsInSet(pb->tregisters);
8283 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
8286 fprintf(of, "; %s\n",r->name);
8287 r = setNextItem(pb->tregisters);
8291 fprintf(of, "; uses %d bytes of stack\n", 1+ elementsInSet(pb->tregisters));
8294 /*-----------------------------------------------------------------*/
8295 /*-----------------------------------------------------------------*/
8297 static void sequencepCode(void)
8303 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8305 pb->seq = GpCodeSequenceNumber+1;
8307 for( pc = pb->pcHead; pc; pc = pc->next)
8308 pc->seq = ++GpCodeSequenceNumber;
8314 /*-----------------------------------------------------------------*/
8315 /*-----------------------------------------------------------------*/
8316 static set *register_usage(pBlock *pb)
8319 set *registers=NULL;
8320 set *registersInCallPath = NULL;
8322 /* check recursion */
8324 pc = setFirstItem(pb->function_entries);
8331 if(pc->type != PC_FUNCTION)
8332 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
8334 pc = setFirstItem(pb->function_calls);
8335 for( ; pc; pc = setNextItem(pb->function_calls)) {
8337 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8338 char *dest = pic16_get_op_from_instruction(PCI(pc));
8340 pcn = findFunction(dest);
8342 registersInCallPath = register_usage(pcn->pb);
8344 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8349 pBlockStats(stderr,pb); // debug
8352 // Mark the registers in this block as used.
8354 MarkUsedRegisters(pb->tregisters);
8355 if(registersInCallPath) {
8356 /* registers were used in the functions this pBlock has called */
8357 /* so now, we need to see if these collide with the ones we are */
8360 regs *r1,*r2, *newreg;
8362 DFPRINTF((stderr,"comparing registers\n"));
8364 r1 = setFirstItem(registersInCallPath);
8367 r2 = setFirstItem(pb->tregisters);
8369 while(r2 && (r1->type != REG_STK)) {
8371 if(r2->rIdx == r1->rIdx) {
8372 newreg = pic16_findFreeReg(REG_GPR);
8376 DFPRINTF((stderr,"Bummer, no more registers.\n"));
8380 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
8381 r1->rIdx, newreg->rIdx));
8382 r2->rIdx = newreg->rIdx;
8383 //if(r2->name) Safe_free(r2->name);
8385 r2->name = Safe_strdup(newreg->name);
8389 newreg->wasUsed = 1;
8391 r2 = setNextItem(pb->tregisters);
8394 r1 = setNextItem(registersInCallPath);
8397 /* Collisions have been resolved. Now free the registers in the call path */
8398 r1 = setFirstItem(registersInCallPath);
8400 if(r1->type != REG_STK) {
8401 newreg = pic16_regWithIdx(r1->rIdx);
8404 r1 = setNextItem(registersInCallPath);
8408 // MarkUsedRegisters(pb->registers);
8410 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
8413 DFPRINTF((stderr,"returning regs\n"));
8415 DFPRINTF((stderr,"not returning regs\n"));
8417 DFPRINTF((stderr,"pBlock after register optim.\n"));
8418 pBlockStats(stderr,pb); // debug
8424 /*-----------------------------------------------------------------*/
8425 /* pct2 - writes the call tree to a file */
8427 /*-----------------------------------------------------------------*/
8428 static void pct2(FILE *of,pBlock *pb,int indent,int usedstack)
8432 // set *registersInCallPath = NULL;
8438 fprintf(of, "recursive function\n");
8439 return; //recursion ?
8442 pc = setFirstItem(pb->function_entries);
8449 for(i=0;i<indent;i++) // Indentation
8453 if(pc->type == PC_FUNCTION) {
8454 usedstack += PCF(pc)->stackusage;
8455 fprintf(of,"%s (stack: %i)\n",PCF(pc)->fname, usedstack);
8456 } else return; // ???
8459 pc = setFirstItem(pb->function_calls);
8460 for( ; pc; pc = setNextItem(pb->function_calls)) {
8462 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8463 char *dest = pic16_get_op_from_instruction(PCI(pc));
8465 pcn = findFunction(dest);
8467 pct2(of,pcn->pb,indent+1, usedstack); // + PCF(pcn)->stackusage);
8469 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8477 /*-----------------------------------------------------------------*/
8478 /* pic16_printCallTree - writes the call tree to a file */
8480 /*-----------------------------------------------------------------*/
8482 void pic16_printCallTree(FILE *of)
8494 fprintf(of, "\npBlock statistics\n");
8495 for(pb = the_pFile->pbHead; pb; pb = pb->next )
8499 fprintf(of,"Call Tree\n");
8500 pbr = the_pFile->functions;
8504 if(!ispCodeFunction(pc))
8505 fprintf(of,"bug in call tree");
8508 fprintf(of,"Function: %s\n", PCF(pc)->fname);
8510 while(pc->next && !ispCodeFunction(pc->next)) {
8512 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
8513 fprintf(of,"\t%s\n",pic16_get_op_from_instruction(PCI(pc)));
8521 fprintf(of,"\n**************\n\na better call tree\n");
8522 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8527 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8528 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
8534 /*-----------------------------------------------------------------*/
8536 /*-----------------------------------------------------------------*/
8538 static void InlineFunction(pBlock *pb)
8546 pc = setFirstItem(pb->function_calls);
8548 for( ; pc; pc = setNextItem(pb->function_calls)) {
8551 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8557 if(pcn && isPCF(pcn) && (PCF(pcn)->ncalled == 0)) { /* change 0 to 1 to enable inlining */
8559 //fprintf(stderr,"Cool can inline:\n");
8560 //pcn->print(stderr,pcn);
8562 //fprintf(stderr,"recursive call Inline\n");
8563 InlineFunction(pcn->pb);
8564 //fprintf(stderr,"return from recursive call Inline\n");
8567 At this point, *pc points to a CALL mnemonic, and
8568 *pcn points to the function that is being called.
8570 To in-line this call, we need to remove the CALL
8571 and RETURN(s), and link the function pCode in with
8577 /* Remove the CALL */
8581 /* remove callee pBlock from the pBlock linked list */
8582 removepBlock(pcn->pb);
8590 /* Remove the Function pCode */
8591 pct = pic16_findNextInstruction(pcn->next);
8593 /* Link the function with the callee */
8594 pc->next = pcn->next;
8595 pcn->next->prev = pc;
8597 /* Convert the function name into a label */
8599 pbr = Safe_calloc(1,sizeof(pBranch));
8600 pbr->pc = pic16_newpCodeLabel(PCF(pcn)->fname, -1);
8602 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,pbr);
8603 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
8605 /* turn all of the return's except the last into goto's */
8606 /* check case for 2 instruction pBlocks */
8607 pce = pic16_findNextInstruction(pcn->next);
8609 pCode *pce_next = pic16_findNextInstruction(pce->next);
8611 if(pce_next == NULL) {
8612 /* found the last return */
8613 pCode *pc_call_next = pic16_findNextInstruction(pc_call->next);
8615 //fprintf(stderr,"found last return\n");
8616 //pce->print(stderr,pce);
8617 pce->prev->next = pc_call->next;
8618 pc_call->next->prev = pce->prev;
8619 PCI(pc_call_next)->label = pic16_pBranchAppend(PCI(pc_call_next)->label,
8629 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8635 /*-----------------------------------------------------------------*/
8637 /*-----------------------------------------------------------------*/
8639 void pic16_InlinepCode(void)
8648 if(!functionInlining)
8651 /* Loop through all of the function definitions and count the
8652 * number of times each one is called */
8653 //fprintf(stderr,"inlining %d\n",__LINE__);
8655 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8657 pc = setFirstItem(pb->function_calls);
8659 for( ; pc; pc = setNextItem(pb->function_calls)) {
8662 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8663 if(pcn && isPCF(pcn)) {
8664 PCF(pcn)->ncalled++;
8667 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8672 //fprintf(stderr,"inlining %d\n",__LINE__);
8674 /* Now, Loop through the function definitions again, but this
8675 * time inline those functions that have only been called once. */
8677 InlineFunction(the_pFile->pbHead);
8678 //fprintf(stderr,"inlining %d\n",__LINE__);
8680 for(pb = the_pFile->pbHead; pb; pb = pb->next)
8685 char *pic_optype_names[]={
8686 "PO_NONE", // No operand e.g. NOP
8687 "PO_W", // The working register (as a destination)
8688 "PO_WREG", // The working register (as a file register)
8689 "PO_STATUS", // The 'STATUS' register
8690 "PO_BSR", // The 'BSR' register
8691 "PO_FSR0", // The "file select register" (in PIC18 family it's one
8693 "PO_INDF0", // The Indirect register
8694 "PO_INTCON", // Interrupt Control register
8695 "PO_GPR_REGISTER", // A general purpose register
8696 "PO_GPR_BIT", // A bit of a general purpose register
8697 "PO_GPR_TEMP", // A general purpose temporary register
8698 "PO_SFR_REGISTER", // A special function register (e.g. PORTA)
8699 "PO_PCL", // Program counter Low register
8700 "PO_PCLATH", // Program counter Latch high register
8701 "PO_PCLATU", // Program counter Latch upper register
8702 "PO_PRODL", // Product Register Low
8703 "PO_PRODH", // Product Register High
8704 "PO_LITERAL", // A constant
8705 "PO_REL_ADDR", // A relative address
8706 "PO_IMMEDIATE", // (8051 legacy)
8707 "PO_DIR", // Direct memory (8051 legacy)
8708 "PO_CRY", // bit memory (8051 legacy)
8709 "PO_BIT", // bit operand.
8710 "PO_STR", // (8051 legacy)
8712 "PO_WILD" // Wild card operand in peep optimizer
8716 char *dumpPicOptype(PIC_OPTYPE type)
8718 return (pic_optype_names[ type ]);
8722 /*** BEGIN of stuff belonging to the BANKSEL optimization ***/
8725 #define MAX_COMMON_BANK_SIZE 32
8726 #define FIRST_PSEUDO_BANK_NR 1000
8728 hTab *sym2bank = NULL; // <OPERAND NAME> --> <PSEUDO BANK NR>
8729 hTab *bank2sym = NULL; // <PSEUDO BANK NR> --> <OPERAND NAME>
8730 hTab *coerce = NULL; // <PSEUDO BANK NR> --> <&PSEUDOBANK>
8733 typedef enum { INVALID_BANK = -1, UNKNOWN_BANK = -2, FIXED_BANK = -3 } pseudoBankNr;
8736 pseudoBankNr bank; // number assigned to this pseudoBank
8737 unsigned int size; // number of operands assigned to this bank
8738 unsigned int ref; // number of symbols referring to this pseudoBank (for garbage collection)
8741 /*----------------------------------------------------------------------*/
8742 /* hashSymbol - hash function used to map SYMBOLs (or operands) to ints */
8743 /*----------------------------------------------------------------------*/
8744 unsigned int hashSymbol (const char *str)
8746 unsigned int res = 0;
8751 res = (res << 4) | (res >> (8 * sizeof(unsigned int) - 4));
8758 /*-----------------------------------------------------------------------*/
8759 /* compareSymbol - return 1 iff sym1 equals sym2 */
8760 /*-----------------------------------------------------------------------*/
8761 int compareSymbol (const void *sym1, const void *sym2)
8763 char *s1 = (char*) sym1;
8764 char *s2 = (char*) sym2;
8766 return (strcmp (s1,s2) == 0);
8769 /*-----------------------------------------------------------------------*/
8770 /* comparePre - return 1 iff p1 == p2 */
8771 /*-----------------------------------------------------------------------*/
8772 int comparePtr (const void *p1, const void *p2)
8777 /*----------------------------------------------------------*/
8778 /* getSymbolFromOperand - return a pointer to the symbol in */
8779 /* the given operand and its length */
8780 /*----------------------------------------------------------*/
8781 char *getSymbolFromOperand (char *op, unsigned int *len)
8786 if (!op) return NULL;
8788 // we recognize two forms of operands: SYMBOL and (SYMBOL + offset)
8790 if (*sym == '(') sym++;
8793 while (((*curr >= 'A') && (*curr <= 'Z'))
8794 || ((*curr >= 'a') && (*curr <= 'z'))
8795 || ((curr != sym) && (*curr >= '0') && (*curr <= '9'))
8796 || (*curr == '_')) {
8797 // find end of symbol [A-Za-z_]?[A-Za-z0-9]*
8805 /*--------------------------------------------------------------------------*/
8806 /* getSymFromBank - get (one) name of a symbol assigned to the given bank */
8807 /*--------------------------------------------------------------------------*/
8808 char *getSymFromBank (pseudoBankNr bank)
8812 if (bank < 0) return "<INVALID BANK NR>";
8813 return hTabFindByKey (bank2sym, bank % bank2sym->size, (void *) bank, &comparePtr);
8816 /*-----------------------------------------------------------------------*/
8817 /* getPseudoBsrFromOperand - maps a string to its corresponding pseudo */
8818 /* bank number (uses hTab sym2bank), if the */
8819 /* symbol is not yet assigned a pseudo bank it */
8820 /* is assigned one here */
8821 /*-----------------------------------------------------------------------*/
8822 pseudoBankNr getPseudoBankNrFromOperand (const char *op)
8824 static pseudoBankNr next_bank = FIRST_PSEUDO_BANK_NR;
8830 hash = hashSymbol (op) % sym2bank->size;
8831 bank = (pseudoBankNr) hTabFindByKey (sym2bank, hash, op, &compareSymbol);
8832 if (bank == (pseudoBankNr)NULL) bank = UNKNOWN_BANK;
8834 if (bank == UNKNOWN_BANK) {
8835 // create a pseudo bank for the operand
8837 hTabAddItemLong (&sym2bank, hash, (char *)op, (void *)bank);
8838 hTabAddItemLong (&bank2sym, bank, (void *) bank, (void *)op);
8839 getOrAddGNode (adj, NULL, bank); // adds the node if it does not exist yet
8840 //fprintf (stderr, "%s:%d: adding %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8842 //fprintf (stderr, "%s:%d: found %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8850 /*--------------------------------------------------------------------*/
8851 /* isBanksel - check whether the given pCode is a BANKSEL instruction */
8852 /*--------------------------------------------------------------------*/
8853 int isBanksel (pCode *pc)
8857 if (isPCI(pc) && (PCI(pc)->op == POC_BANKSEL || PCI(pc)->op == POC_MOVLB)) {
8858 // BANKSEL <variablename> or MOVLB <banknr>
8859 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8863 // check for inline assembler BANKSELs
8864 if (isPCAD(pc) && PCAD(pc)->directive && (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0 ||
8865 STRCASECMP(PCAD(pc)->directive,"MOVLB") == 0)) {
8866 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8870 // assume pc is no BANKSEL instruction
8874 /*---------------------------------------------------------------------------------*/
8875 /* invalidatesBSR - check whether the pCodeInstruction passed in modifies the BSR */
8876 /* This method can not guarantee to find all modifications of the */
8877 /* BSR (e.g. via INDirection registers) but covers all compiler */
8878 /* generated plus some cases. */
8879 /*---------------------------------------------------------------------------------*/
8880 int invalidatesBSR(pCode *pc)
8882 // assembler directives invalidate BSR (well, they might, we don't know)
8883 if (isPCAD(pc)) return 1;
8885 // only ASMDIRs and pCodeInstructions can invalidate BSR
8886 if (!isPCI(pc)) return 0;
8888 // we have a pCodeInstruction
8890 // check for BSR modifying instructions
8891 switch (PCI(pc)->op) {
8895 case POC_RETFIE: // might be used as CALL replacement
8896 case POC_RETLW: // might be used as CALL replacement
8897 case POC_RETURN: // might be used as CALL replacement
8902 default: // other instruction do not change BSR unless BSR is an explicit operand!
8903 // TODO: check for BSR as an explicit operand (e.g. INCF BSR,F), which should be rather unlikely...!
8907 // no change of BSR possible/probable
8911 /*------------------------------------------------------------*/
8912 /* getBankFromBanksel - return the pseudo bank nr assigned to */
8913 /* the symbol referenced in this BANKSEL */
8914 /*------------------------------------------------------------*/
8915 pseudoBankNr getBankFromBanksel (pCode *pc)
8918 int data = (int)NULL;
8920 if (!pc) return INVALID_BANK;
8922 if (isPCAD(pc) && PCAD(pc)->directive) {
8923 if (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0) {
8924 // get symbolname from PCAD(pc)->arg
8925 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8926 sym = PCAD(pc)->arg;
8927 data = getPseudoBankNrFromOperand (sym);
8928 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8929 } else if (STRCASECMP(PCAD(pc)->directive,"MOVLB")) {
8930 // get (literal) bank number from PCAD(pc)->arg
8931 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8932 assert (0 && "not yet implemented - turn off banksel optimization for now");
8934 } else if (isPCI(pc)) {
8935 if (PCI(pc)->op == POC_BANKSEL) {
8936 // get symbolname from PCI(pc)->pcop->name (?)
8937 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8938 sym = PCI(pc)->pcop->name;
8939 data = getPseudoBankNrFromOperand (sym);
8940 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8941 } else if (PCI(pc)->op == POC_MOVLB) {
8942 // get (literal) bank number from PCI(pc)->pcop->name
8943 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8944 assert (0 && "not yet implemented - turn off banksel optimization for now");
8949 // no assigned bank could be found
8950 return UNKNOWN_BANK;
8955 /*------------------------------------------------------------------------------*/
8956 /* getEffectiveBank - resolves the currently assigned effective pseudo bank nr */
8957 /*------------------------------------------------------------------------------*/
8958 pseudoBankNr getEffectiveBank (pseudoBankNr bank)
8962 if (bank < FIRST_PSEUDO_BANK_NR) return bank;
8965 //fprintf (stderr, "%s:%d: bank=%d\n", __FUNCTION__, __LINE__, bank);
8966 data = (pseudoBank *) hTabFindByKey (coerce, bank % coerce->size, (void *) bank, &comparePtr);
8968 if (data->bank != bank)
8975 //fprintf (stderr, "%s:%d: effective bank=%d\n", __FUNCTION__, __LINE__, bank);
8979 /*------------------------------------------------------------------*/
8980 /* attachBsrInfo2pBlock - create a look-up table as to which pseudo */
8981 /* bank is selected at a given pCode */
8982 /*------------------------------------------------------------------*/
8984 /* Create a graph with pseudo banks as its nodes and switches between
8985 * these as edges (with the edge weight representing the absolute
8986 * number of BANKSELs from one to the other).
8987 * Removes redundand BANKSELs instead iff mod == 1.
8988 * BANKSELs update the pseudo BSR, labels invalidate the current BSR
8989 * value (setting it to 0=UNNKOWN), (R)CALLs also invalidate the
8991 * TODO: check ALL instructions operands if they modify BSR directly...
8993 * pb - the pBlock to annotate
8994 * mod - select either graph creation (0) or BANKSEL removal (1)
8996 unsigned int attachBsrInfo2pBlock (pBlock *pb, int mod)
8998 pCode *pc, *pc_next;
8999 unsigned int prevBSR = UNKNOWN_BANK, pseudoBSR = UNKNOWN_BANK;
9000 int isBankselect = 0;
9001 unsigned int banksels=0;
9005 pc = pic16_findNextInstruction(pb->pcHead);
9007 isBankselect = isBanksel (pc);
9008 pc_next = pic16_findNextInstruction (pc->next);
9010 if (!hasNoLabel (pc)) {
9011 // we don't know our predecessors -- assume different BSRs
9012 prevBSR = UNKNOWN_BANK;
9013 pseudoBSR = UNKNOWN_BANK;
9014 //fprintf (stderr, "invalidated by label at "); pc->print (stderr, pc);
9017 // check if this is a BANKSEL instruction
9019 pseudoBSR = getEffectiveBank (getBankFromBanksel(pc));
9020 //fprintf (stderr, "BANKSEL via "); pc->print (stderr, pc);
9022 if (prevBSR == pseudoBSR && pseudoBSR >= 0) {
9023 //fprintf (stderr, "removing redundant "); pc->print (stderr, pc);
9024 if (1 || pic16_pcode_verbose) pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("removed redundant BANKSEL"));
9025 pic16_unlinkpCode (pc);
9029 addGEdge2 (getOrAddGNode (adj, NULL, prevBSR), getOrAddGNode (adj, NULL, pseudoBSR), 1, 0);
9034 if (!isBankselect && invalidatesBSR(pc)) {
9035 // check if this instruction invalidates the pseudoBSR
9036 pseudoBSR = UNKNOWN_BANK;
9037 //fprintf (stderr, "invalidated via "); pc->print (stderr, pc);
9040 prevBSR = pseudoBSR;
9047 /*------------------------------------------------------------------------------------*/
9048 /* assignToSameBank - returns 0 on success or an error code */
9049 /* 1 - common bank would be too large */
9050 /* 2 - assignment to fixed (absolute) bank not performed */
9052 /* This functions assumes that unsplittable operands are already assigned to the same */
9053 /* bank (e.g. all objects being referenced as (SYMBOL + offset) must be in the same */
9054 /* bank so that we can make sure the bytes are laid out sequentially in memory) */
9055 /* TODO: Symbols with an abslute address must be handled specially! */
9056 /*------------------------------------------------------------------------------------*/
9057 int assignToSameBank (int bank0, int bank1, int doAbs)
9059 int eff0, eff1, dummy;
9060 pseudoBank *pbank0, *pbank1;
9063 eff0 = getEffectiveBank (bank0);
9064 eff1 = getEffectiveBank (bank1);
9066 //fprintf (stderr, "%s:%d: bank0=%d/%d, bank1=%d/%d, doAbs=%d\n", __FUNCTION__, __LINE__, bank0, eff0, bank1, eff1, doAbs);
9068 // nothing to do if already same bank
9069 if (eff0 == eff1) return 0;
9071 if (!doAbs && (eff0 < FIRST_PSEUDO_BANK_NR || eff1 < FIRST_PSEUDO_BANK_NR))
9074 // ensure eff0 < eff1
9076 // swap eff0 and eff1
9085 // now assign bank eff1 to bank eff0
9086 pbank0 = (pseudoBank *) hTabFindByKey (coerce, eff0 % coerce->size, (void *)((char*)0+eff0), &comparePtr);
9088 pbank0 = Safe_calloc (1, sizeof (pseudoBank));
9089 pbank0->bank = eff0;
9092 hTabAddItemLong (&coerce, eff0 % coerce->size, (void *)((char*)0+eff0), (void *) pbank0);
9096 hitem = hTabSearch (coerce, eff1 % coerce->size);
9097 while (hitem && hitem->pkey != (void *)((char*)0+eff1))
9098 hitem = hitem->next;
9100 if (hitem) pbank1 = (pseudoBank *) hitem->item;
9103 fprintf (stderr, "bank #%d/%d & bank #%d/%d --> bank #%d: %u (%s & %s)\n", bank0, eff0, bank1, eff1,
9104 pbank0->bank, pbank0->size,
9105 getSymFromBank (eff0), getSymFromBank (eff1));
9109 if (pbank0->size + pbank1->size > MAX_COMMON_BANK_SIZE) {
9111 fprintf (stderr, "bank #%d: %u, bank #%d: %u --> bank #%d': %u > %u (%s,%s)\n",
9112 pbank0->bank, pbank0->size, pbank1->bank, pbank1->size,
9113 pbank0->bank, pbank0->size + pbank1->size, MAX_COMMON_BANK_SIZE,
9114 getSymFromBank (pbank0->bank), getSymFromBank (pbank1->bank));
9118 pbank0->size += pbank1->size;
9120 if (pbank1->ref == 0) Safe_free (pbank1);
9126 hitem->item = pbank0;
9128 hTabAddItemLong (&coerce, eff1 % coerce->size, (void *)((char*)0+eff1), (void *) pbank0);
9131 //fprintf (stderr, "%s:%d: leaving.\n", __FUNCTION__, __LINE__);
9136 /*----------------------------------------------------------------*/
9137 /* mergeGraphNodes - combines two nodes into one and modifies all */
9138 /* edges to and from the nodes accordingly */
9139 /* This method needs complete backedges, i.e. if (A,B) is an edge */
9140 /* then also (B,A) must be an edge (possibly with weight 0). */
9141 /*----------------------------------------------------------------*/
9142 void mergeGraphNodes (GraphNode *node1, GraphNode *node2)
9144 GraphEdge *edge, *backedge, *nextedge;
9148 assert (node1 && node2);
9149 assert (node1 != node2);
9151 // add all edges starting at node2 to node1
9154 nextedge = edge->next;
9156 backedge = getGEdge (node, node2);
9158 backweight = backedge->weight;
9161 // insert edges (node1,node) and (node,node1)
9162 addGEdge2 (node1, node, edge->weight, backweight);
9163 // remove edges (node, node2) and (node2, node)
9164 remGEdge (node2, node);
9165 remGEdge (node, node2);
9169 // now node2 should not be referenced by any other GraphNode...
9170 //remGNode (adj, node2->data, node2->hash);
9173 /*----------------------------------------------------------------*/
9174 /* showGraph - dump the current BANKSEL graph as a node/edge list */
9175 /*----------------------------------------------------------------*/
9176 void showGraph (Graph *g)
9180 pseudoBankNr bankNr;
9187 bankNr = getEffectiveBank (node->hash);
9188 assert (bankNr >= 0);
9189 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9191 bankNr = pbank->bank;
9197 fprintf (stderr, "edges from %s (bank %u, size %u) to:\n", getSymFromBank (node->hash), bankNr, size);
9200 if (edge->weight > 0)
9201 fprintf (stderr, " %4u x %s\n", edge->weight, getSymFromBank (edge->node->hash));
9208 /*---------------------------------------------------------------*/
9209 /* pic16_OptimizeBanksel - remove redundant BANKSEL instructions */
9210 /*---------------------------------------------------------------*/
9211 void pic16_OptimizeBanksel ()
9213 GraphNode *node, *node1, *node1next;
9216 // needed for more effective bank assignment (needs adjusted pic16_emit_usection())
9217 GraphEdge *edge, *backedge;
9219 int maxWeight, weight, mergeMore, absMaxWeight;
9220 pseudoBankNr curr0, curr1;
9223 pseudoBankNr bankNr;
9224 char *base_symbol0, *base_symbol1;
9229 unsigned int bankselsTotal = 0, bankselsRemoved = 0;
9231 //fprintf (stderr, "%s:%s:%d: entered.\n", __FILE__, __FUNCTION__, __LINE__);
9233 if (!the_pFile || !the_pFile->pbHead) return;
9235 adj = newGraph (NULL);
9236 sym2bank = newHashTable ( 255 );
9237 bank2sym = newHashTable ( 255 );
9238 coerce = newHashTable ( 255 );
9240 // create graph of BANKSEL relationships (node = operands, edge (A,B) iff BANKSEL B follows BANKSEL A)
9241 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9242 bankselsTotal += attachBsrInfo2pBlock (pb, 0);
9246 // assign symbols with absolute addresses to their respective bank nrs
9247 set = pic16_fix_udata;
9248 for (reg = setFirstItem (set); reg; reg = setNextItem (set)) {
9249 bankNr = reg->address >> 8;
9250 node = getOrAddGNode (adj, NULL, bankNr);
9251 bankNr = (pseudoBankNr) getEffectiveBank (getPseudoBankNrFromOperand(reg->name));
9252 assignToSameBank (node->hash, bankNr, 1);
9254 assert (bankNr >= 0);
9255 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9257 pbank = Safe_calloc (1, sizeof (pseudoBank));
9258 pbank->bank = reg->address >> 8; //FIXED_BANK;
9261 hTabAddItemLong (&coerce, bankNr % coerce->size, (void *) bankNr, pbank);
9263 assert (pbank->bank == (reg->address >> 8));
9264 pbank->bank = reg->address >> 8; //FIXED_BANK;
9266 //fprintf (stderr, "ABS: %s (%d bytes) at %x in bank %u\n", reg->name, reg->size, reg->address, bankNr);
9271 // assign operands referring to the same symbol (which is not given an absolute address) to the same bank
9272 //fprintf (stderr, "assign operands with the same symbol to the same bank\n");
9275 if (node->hash < 0) { node = node->next; continue; }
9276 base_symbol0 = getSymbolFromOperand (getSymFromBank (getEffectiveBank(node->hash)), &len0);
9279 if (node1->hash < 0) { node1 = node1->next; continue; }
9280 node1next = node1->next;
9281 base_symbol1 = getSymbolFromOperand (getSymFromBank (getEffectiveBank (node1->hash)), &len1);
9282 if (len0 == len1 && len0 > 0 && strncmp (base_symbol0, base_symbol1, len0) == 0) {
9283 // TODO: check for symbols with absolute addresses -- these might be placed across bank boundaries!
9284 //fprintf (stderr, "merging %s and %s\n", getSymFromBank (getEffectiveBank(node->hash)), getSymFromBank (getEffectiveBank(node1->hash)));
9285 if (assignToSameBank (node->hash, node1->hash, 0)) {
9286 fprintf (stderr, "%s(%d) == %s(%d)\n", base_symbol0, len0, base_symbol1, len1);
9287 assert (0 && "Could not assign a symbol to a bank!");
9289 mergeGraphNodes (node, node1);
9291 if (node->hash < node1->hash)
9292 mergeGraphNodes (node, node1);
9294 mergeGraphNodes (node1, node); // this removes node so node->next will fail...
9304 // >>> THIS ALSO NEEDS AN UPDATED pic16_emit_usection() TO REFLECT THE BANK ASSIGNMENTS <<<
9305 // assign tightly coupled operands to the same (pseudo) bank
9306 //fprintf (stderr, "assign tightly coupled operands to the same bank\n");
9314 curr0 = getEffectiveBank (node->hash);
9315 if (curr0 < 0) { node = node->next; continue; }
9318 assert (edge->src == node);
9319 backedge = getGEdge (edge->node, edge->src);
9320 weight = edge->weight + (backedge ? backedge->weight : 0);
9321 curr1 = getEffectiveBank (edge->node->hash);
9322 if (curr1 < 0) { edge = edge->next; continue; }
9324 // merging is only useful if the items are not assigned to the same bank already...
9325 if (curr0 != curr1 && weight > maxWeight) {
9326 if (maxWeight > absMaxWeight) absMaxWeight = maxWeight;
9335 if (maxWeight > 0) {
9337 fprintf (stderr, "%s:%d: merging (%4u) %d(%s) and %d(%s)\n", __FUNCTION__, __LINE__, maxWeight,
9338 max->src->hash, getSymFromBank (max->src->hash),
9339 max->node->hash, getSymFromBank (max->node->hash));
9342 node = getGNode (adj, max->src->data, max->src->hash);
9343 node1 = getGNode (adj, max->node->data, max->node->hash);
9345 if (0 == assignToSameBank (max->src->hash, max->node->hash, 0)) {
9346 if (max->src->hash < max->node->hash)
9347 mergeGraphNodes (node, node1);
9349 mergeGraphNodes (node1, node);
9351 remGEdge (node, node1);
9352 remGEdge (node1, node);
9363 // remove redundant BANKSELs
9364 //fprintf (stderr, "removing redundant BANKSELs\n");
9365 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9366 bankselsRemoved += attachBsrInfo2pBlock (pb, 1);
9371 fprintf (stderr, "display graph\n");
9376 //fprintf (stderr, "%s:%s:%d: leaving, %u/%u BANKSELs removed...\n", __FILE__, __FUNCTION__, __LINE__, bankselsRemoved, bankselsTotal);
9379 /*** END of stuff belonging to the BANKSEL optimization ***/
9383 /*** BEGIN of helpers for pCode dataflow optimizations ***/
9385 typedef unsigned int symbol_t;
9386 typedef unsigned int valnum_t;
9387 //typedef unsigned int hash_t;
9390 #define INT_TO_PTR(x) (((char *) 0) + (x))
9394 #define PTR_TO_INT(x) (((char *)(x)) - ((char *) 0))
9398 static unsigned int pic16_df_removed_pcodes = 0;
9399 static unsigned int pic16_df_saved_bytes = 0;
9400 static unsigned int df_findall_sameflow = 0;
9401 static unsigned int df_findall_otherflow = 0;
9402 static unsigned int df_findall_in_vals = 0;
9404 static void pic16_df_stats () {
9406 if (pic16_debug_verbose || pic16_pcode_verbose) {
9407 fprintf (stderr, "PIC16: dataflow analysis removed %u instructions (%u bytes)\n", pic16_df_removed_pcodes, pic16_df_saved_bytes);
9408 fprintf (stderr, "findAll: same flow %u (%u in_vals), other flow %u\n", df_findall_sameflow, df_findall_in_vals, df_findall_otherflow);
9409 //pic16_df_removed_pcodes = pic16_df_saved_bytes = 0;
9413 /* Remove a pCode iff possible:
9414 * - previous pCode is no SKIP
9416 * Returns 1 iff the pCode has been removed, 0 otherwise. */
9417 static int pic16_safepCodeUnlink (pCode *pc, char *comment) {
9418 pCode *pcprev, *pcnext;
9419 char buf[256], *total=NULL;
9422 if (!comment) comment = "=DF= pCode removed by pic16_safepCodeUnlink";
9424 pcprev = pic16_findPrevInstruction (pc->prev);
9425 pcnext = pic16_findNextInstruction (pc->next);
9427 /* if previous instruction is a skip -- do not remove */
9428 if (pcprev && isPCI_SKIP(pcprev)) return 0;
9430 /* move labels to next instruction (if possible) */
9431 if (PCI(pc)->label && !pcnext) return 0;
9433 if (PCI(pc)->label) {
9434 //fprintf (stderr, "%s: moving label(s)\n", __FUNCTION__);
9435 //pc->print (stderr, pc);
9436 PCI(pcnext)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pcnext)->label);
9437 PCI(pc)->label = NULL;
9440 /* update statistics */
9441 pic16_df_removed_pcodes++;
9442 if (isPCI(pc)) pic16_df_saved_bytes += PCI(pc)->isize;
9444 /* remove the pCode */
9445 pic16_pCode2str (buf, 256, pc);
9446 //fprintf (stderr, "%s: removing pCode: %s\n", __FUNCTION__, buf);
9447 if (0 || pic16_debug_verbose || pic16_pcode_verbose) {
9448 len = strlen (buf) + strlen (comment) + 10;
9449 total = (char *) Safe_malloc (len);
9450 SNPRINTF (total, len, "%s: %s", comment, buf);
9451 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(total));
9455 /* actually unlink it from the pBlock -- also remove from to/from lists */
9456 pic16_pCodeUnlink (pc);
9458 /* remove the pCode -- release registers */
9461 /* report success */
9466 /* ======================================================================== */
9467 /* === SYMBOL HANDLING ==================================================== */
9468 /* ======================================================================== */
9470 static hTab *map_strToSym = NULL; /** (char *) --> symbol_t */
9471 static hTab *map_symToStr = NULL; /** symbol_t -> (char *) */
9472 static symbol_t nextSymbol = 0x2000; /** next symbol_t assigned to the next generated symbol */
9474 /** Calculate a hash for a given string.
9475 * If len == 0 the string is assumed to be NUL terminated. */
9476 static hash_t symbolHash (const char *str, unsigned int len) {
9480 hash = (hash << 2) ^ *str;
9485 hash = (hash << 2) ^ *str;
9492 /** Return 1 iff strings v1 and v2 are identical. */
9493 static int symcmp (const void *v1, const void *v2) {
9494 return !strcmp ((const char *) v1, (const char *) v2);
9497 /** Return 1 iff pointers v1 and v2 are identical. */
9498 static int ptrcmp (const void *v1, const void *v2) {
9502 enum { SPO_WREG=0x1000,
9542 /* Return the unique symbol_t for the given string. */
9543 static symbol_t symFromStr (const char *str) {
9548 if (!map_symToStr) {
9550 struct { char *name; symbol_t sym; } predefsyms[] = {
9552 {"STATUS", SPO_STATUS},
9553 {"PRODL", SPO_PRODL},
9554 {"PRODH", SPO_PRODH},
9555 {"INDF0", SPO_INDF0},
9556 {"POSTDEC0", SPO_POSTDEC0},
9557 {"POSTINC0", SPO_POSTINC0},
9558 {"PREINC0", SPO_PREINC0},
9559 {"PLUSW0", SPO_PLUSW0},
9560 {"INDF1", SPO_INDF1},
9561 {"POSTDEC1", SPO_POSTDEC1},
9562 {"POSTINC1", SPO_POSTINC1},
9563 {"PREINC1", SPO_PREINC1},
9564 {"PLUSW1", SPO_PLUSW1},
9565 {"INDF2", SPO_INDF2},
9566 {"POSTDEC2", SPO_POSTDEC2},
9567 {"POSTINC2", SPO_POSTINC2},
9568 {"PREINC2", SPO_PREINC2},
9569 {"PLUSW2", SPO_PLUSW2},
9570 {"STKPTR", SPO_STKPTR},
9575 {"FSR0L", SPO_FSR0L},
9576 {"FSR0H", SPO_FSR0H},
9577 {"FSR1L", SPO_FSR1L},
9578 {"FSR1H", SPO_FSR1H},
9579 {"FSR2L", SPO_FSR2L},
9580 {"FSR2H", SPO_FSR2H},
9582 {"PCLATH", SPO_PCLATH},
9583 {"PCLATU", SPO_PCLATU},
9584 {"TABLAT", SPO_TABLAT},
9585 {"TBLPTRL", SPO_TBLPTRL},
9586 {"TBLPTRH", SPO_TBLPTRH},
9587 {"TBLPTRU", SPO_TBLPTRU},
9591 map_strToSym = newHashTable (128);
9592 map_symToStr = newHashTable (128);
9594 for (i=0; predefsyms[i].name; i++) {
9597 /* enter new symbol */
9598 sym = predefsyms[i].sym;
9599 name = predefsyms[i].name;
9600 res = Safe_strdup (name);
9601 hash = symbolHash (name, 0);
9603 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9604 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9608 hash = symbolHash (str, 0) % map_strToSym->size;
9610 /* find symbol in table */
9611 sym = PTR_TO_INT(hTabFindByKey (map_strToSym, hash, str, &symcmp));
9613 //fprintf (stderr, "found symbol %u for %s\n", sym, str);
9617 /* enter new symbol */
9619 res = Safe_strdup (str);
9621 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9622 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9624 //fprintf (stderr, "created symbol %u for %s\n", sym, res);
9630 static const char *strFromSym (symbol_t sym) {
9631 return (const char *) hTabFindByKey (map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), &ptrcmp);
9635 /* ======================================================================== */
9636 /* === DEFINITION MAP HANDLING ============================================ */
9637 /* ======================================================================== */
9639 /* A defmap provides information about which symbol is defined by which pCode.
9640 * The most recent definitions are prepended to the list, so that the most
9641 * recent definition can be found by forward scanning the list.
9642 * pc2: MOVFF r0x00, r0x01
9644 * head --> ("r0x01",pc1,42) --> ("STATUS",pc1,44) --> ("r0x01",pc2,28) --> NULL
9646 * We attach one defmap to each flow object, and each pCode will occur at
9647 * least once in its flow's defmap (maybe defining the 0 symbol). This can be
9648 * used to find definitions for a pCode in its own defmap that precede pCode.
9651 typedef struct defmap_s {
9652 symbol_t sym; /** symbol this item refers to */
9655 unsigned int in_mask:8; /** mask leaving in accessed bits */
9656 unsigned int mask:8; /** mask leaving in modified bits (if isWrite) */
9657 int isRead:1; /** sym/mask is read */
9658 int isWrite:1; /** sym/mask is written */
9662 pCode *pc; /** pCode this symbol is refrenced at */
9663 valnum_t in_val; /** valnum_t of symbol's previous value (the one read at pc) */
9664 valnum_t val; /** new unique number for this value (if isWrite) */
9665 struct defmap_s *prev, *next; /** link to previous an next definition */
9668 static defmap_t *defmap_free = NULL; /** list of unused defmaps */
9669 static int defmap_free_count = 0; /** number of released defmap items */
9671 /* Returns a defmap_t with the specified data; this will be the new list head.
9672 * next - pointer to the current list head */
9673 static defmap_t *newDefmap (symbol_t sym, int in_mask, int mask, int isRead, int isWrite, pCode *pc, valnum_t val, defmap_t *next) {
9678 defmap_free = map->next;
9679 --defmap_free_count;
9681 map = (defmap_t *) Safe_calloc (1, sizeof (defmap_t));
9684 map->acc.access.in_mask = (isRead ? (in_mask ? in_mask : 0xFF) : 0x00);
9685 map->acc.access.mask = (isWrite ? (mask ? mask : 0xFF) : 0x00);
9686 map->acc.access.isRead = (isRead != 0);
9687 map->acc.access.isWrite = (isWrite != 0);
9690 map->val = (isWrite ? val : 0);
9693 if (next) next->prev = map;
9698 /* Returns a copy of the single defmap item. */
9699 static defmap_t *copyDefmap (defmap_t *map) {
9700 defmap_t *res = (defmap_t *) Safe_malloc (sizeof (defmap_t));
9701 memcpy (res, map, sizeof (defmap_t));
9707 /* Insert a defmap item after the specified one. */
9708 static int defmapInsertAfter (defmap_t *ref, defmap_t *newItem) {
9709 if (!ref || !newItem) return 1;
9711 newItem->next = ref->next;
9712 newItem->prev = ref;
9713 ref->next = newItem;
9714 if (newItem->next) newItem->next->prev = newItem;
9719 /* Check whether item (or an identical one) is already in the chain and add it if neccessary.
9720 * item is copied before insertion into chain and therefore left untouched.
9721 * Returns 1 iff the item has been inserted into the list, 0 otherwise. */
9722 static int defmapAddCopyIfNew (defmap_t **head, defmap_t *item) {
9725 while (dummy && (dummy->sym != item->sym
9726 || dummy->pc != item->pc
9727 || dummy->acc.accessmethod != item->acc.accessmethod
9728 || dummy->val != item->val
9729 || dummy->in_val != item->in_val)) {
9730 dummy = dummy->next;
9733 /* item already present? */
9734 if (dummy) return 0;
9736 /* otherwise: insert copy of item */
9737 dummy = copyDefmap (item);
9738 dummy->next = *head;
9739 if (*head) (*head)->prev = dummy;
9745 /* Releases a defmap. This also removes the map from its chain -- update the head manually! */
9746 static void deleteDefmap (defmap_t *map) {
9749 /* unlink from chain -- fails for the first item (head is not updated!) */
9750 if (map->next) map->next->prev = map->prev;
9751 if (map->prev) map->prev->next = map->next;
9754 memset (map, 0, sizeof (defmap_t));
9756 /* save for future use */
9757 map->next = defmap_free;
9759 ++defmap_free_count;
9762 /* Release all defmaps referenced from map. */
9763 static void deleteDefmapChain (defmap_t **_map) {
9764 defmap_t *map, *next;
9770 /* find list head */
9771 while (map && map->prev) map = map->prev;
9773 /* delete all items */
9783 /* Free all defmap items. */
9784 static void freeDefmap (defmap_t **_map) {
9792 /* find list head */
9793 while (map->prev) map = map->prev;
9795 /* release all items */
9805 /* Returns the most recent definition for the given symbol preceeding pc.
9806 * If no definition is found, NULL is returned.
9807 * If pc == NULL the whole list is scanned. */
9808 static defmap_t *defmapFindDef (defmap_t *map, symbol_t sym, pCode *pc) {
9809 defmap_t *curr = map;
9812 /* skip all definitions up to pc */
9813 while (curr && (curr->pc != pc)) curr = curr->next;
9815 /* pc not in the list -- scan the whole list for definitions */
9817 fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9820 /* skip all definitions performed by pc */
9821 while (curr && (curr->pc == pc)) curr = curr->next;
9825 /* find definition for sym */
9826 while (curr && (!curr->acc.access.isWrite || (curr->sym != sym))) {
9834 /* Returns the first use (read) of the given symbol AFTER pc.
9835 * If no such use is found, NULL is returned.
9836 * If pc == NULL the whole list is scanned. */
9837 static defmap_t *defmapFindUse (defmap_t *map, symbol_t sym, pCode *pc) {
9838 defmap_t *curr = map, *prev = NULL;
9841 /* skip all definitions up to pc */
9842 while (curr && (curr->pc != pc)) { prev = curr; curr = curr->next; }
9844 /* pc not in the list -- scan the whole list for definitions */
9846 //fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9850 /* find end of list */
9851 while (curr && curr->next) curr = curr->next;
9854 /* find use of sym (scan list backwards) */
9855 while (curr && (!curr->acc.access.isRead || (curr->sym != sym))) curr = curr->prev;
9861 /* Return the defmap entry for sym AT pc.
9862 * If none is found, NULL is returned.
9863 * If more than one entry is found an assertion is triggered. */
9864 static defmap_t *defmapCurr (defmap_t *map, symbol_t sym, pCode *pc) {
9865 defmap_t *res = NULL;
9867 /* find entries for pc */
9868 while (map && map->pc != pc) map = map->next;
9870 /* find first entry for sym @ pc */
9871 while (map && map->pc == pc && map->sym != sym) map = map->next;
9873 /* no entry found */
9874 if (!map) return NULL;
9876 /* check for more entries */
9879 while (map && map->pc == pc) {
9880 /* more than one entry for sym @ pc found? */
9881 assert (map->sym != sym);
9885 /* return single entry for sym @ pc */
9889 /* Modifies the definition of sym at pCode to newval.
9890 * Returns 0 on success, 1 if no definition of sym in pc has been found.
9892 static int defmapUpdate (defmap_t *map, symbol_t sym, pCode *pc, valnum_t newval) {
9895 /* find definitions of pc */
9896 while (m && m->pc != pc) m = m->next;
9898 /* find definition of sym at pc */
9899 while (m && m->pc == pc && (!m->acc.access.isWrite || (m->sym != sym))) m = m->next;
9901 /* no definition found */
9907 /* update following uses of sym */
9908 while (m && m->pc == pc) m = m->prev;
9910 if (m->sym == sym) {
9912 if (m->acc.access.isWrite) m = NULL;
9920 /* ======================================================================== */
9921 /* === STACK ROUTINES ===================================================== */
9922 /* ======================================================================== */
9924 typedef struct stack_s {
9926 struct stack_s *next;
9929 typedef stackitem_t *dynstack_t;
9930 static stackitem_t *free_stackitems = NULL;
9932 /* Create a stack with one item. */
9933 static dynstack_t *newStack () {
9934 dynstack_t *s = (dynstack_t *) Safe_malloc (sizeof (dynstack_t));
9939 /* Remove a stack -- its items are only marked free. */
9940 static void deleteStack (dynstack_t *s) {
9946 i->next = free_stackitems;
9947 free_stackitems = i;
9952 /* Release all stackitems. */
9953 static void releaseStack () {
9956 while (free_stackitems) {
9957 i = free_stackitems->next;
9958 Safe_free(free_stackitems);
9959 free_stackitems = i;
9963 static void stackPush (dynstack_t *stack, void *data) {
9966 if (free_stackitems) {
9967 i = free_stackitems;
9968 free_stackitems = free_stackitems->next;
9970 i = (stackitem_t *) Safe_calloc (1, sizeof (stackitem_t));
9977 static void *stackPop (dynstack_t *stack) {
9981 if (stack && *stack) {
9982 data = (*stack)->data;
9984 *stack = (*stack)->next;
9985 i->next = free_stackitems;
9986 free_stackitems = i;
9994 static int stackContains (dynstack_t *s, void *data) {
9999 if (i->data == data) return 1;
10008 static int stackIsEmpty (dynstack_t *s) {
10009 return (*s == NULL);
10018 static state_t *newState (pCodeFlow *flow, defmap_t *lastdef) {
10019 state_t *s = (state_t *) Safe_calloc (1, sizeof (state_t));
10021 s->lastdef = lastdef;
10025 static void deleteState (state_t *s) {
10029 static int stateIsNew (state_t *state, dynstack_t *todo, dynstack_t *done) {
10032 /* scan working list for state */
10036 /* is i == state? -- state not new */
10037 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10045 /* is i == state? -- state not new */
10046 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10051 /* not found -- state is new */
10055 static inline valnum_t newValnum ();
10057 const char *pic16_pBlockGetFunctionName (pBlock *pb) {
10060 if (!pb) return "<unknown function>";
10062 pc = pic16_findNextpCode (pb->pcHead, PC_FUNCTION);
10063 if (pc && isPCF(pc)) return PCF(pc)->fname;
10064 else return "<unknown function>";
10067 static defmap_t *pic16_pBlockAddInval (pBlock *pb, symbol_t sym) {
10071 pcfl = PCI(pic16_findNextInstruction (pb->pcHead))->pcflow;
10073 /* find initial value (assigning pc == NULL) */
10074 map = PCFL(pcfl)->in_vals;
10075 while (map && map->sym != sym) map = map->next;
10077 /* initial value already present? */
10079 //fprintf (stderr, "found init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10083 /* create a new initial value */
10084 map = newDefmap (sym, 0x00, 0xff, 0, 1, NULL, newValnum(), PCFL(pcfl)->in_vals);
10085 PCFL(pcfl)->in_vals = map;
10086 //fprintf (stderr, "Created init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10090 /* insert map as last item in pcfl's defmap */
10091 if (!prev) prev = PCFL(pcfl)->defmap;
10093 PCFL(pcfl)->defmap = map;
10095 while (prev->next) prev = prev->next;
10104 /* Find all reaching definitions for sym at pc.
10105 * A new (!) list of definitions is returned.
10106 * Returns the number of reaching definitions found.
10107 * The defining defmap entries are returned in *chain.
10109 static int defmapFindAll (symbol_t sym, pCode *pc, defmap_t **chain) {
10114 pCodeFlowLink *succ;
10116 dynstack_t *todo; /** stack of state_t */
10117 dynstack_t *done; /** stack of state_t */
10119 int firstState, n_defs;
10121 assert (pc && isPCI(pc) && PCI(pc)->pcflow);
10124 /* initialize return list */
10127 /* wildcard symbol? */
10128 if (!sym) return 0;
10130 //fprintf (stderr, "Searching definition of sym %s(%x) @ pc %p(%p)\n", strFromSym(sym), sym, pc, pc->pb);
10132 map = PCI(pc)->pcflow->defmap;
10134 res = defmapFindDef (map, sym, pc);
10135 //if (res) fprintf (stderr, "found def in own flow @ pc %p\n", res->pc);
10137 #define USE_PRECALCED_INVALS 1
10138 #if USE_PRECALCED_INVALS
10139 if (!res && PCI(pc)->pcflow->in_vals) {
10140 res = defmapFindDef (PCI(pc)->pcflow->in_vals, sym, NULL);
10142 //fprintf (stderr, "found def in init values\n");
10143 df_findall_in_vals++;
10149 // found a single definition (in pc's flow)
10150 //fprintf (stderr, "unique definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10151 defmapAddCopyIfNew (chain, res);
10152 df_findall_sameflow++;
10156 #if USE_PRECALCED_INVALS
10158 defmapAddCopyIfNew (chain, pic16_pBlockAddInval (pc->pb, sym));
10164 #define FORWARD_FLOW_ANALYSIS 1
10165 #if defined FORWARD_FLOW_ANALYSIS && FORWARD_FLOW_ANALYSIS
10166 /* no definition found in pc's flow preceeding pc */
10167 todo = newStack ();
10168 done = newStack ();
10169 n_defs = 0; firstState = 1;
10170 stackPush (todo, newState (PCI(pic16_findNextInstruction(pc->pb->pcHead))->pcflow, res));
10172 while (!stackIsEmpty (todo)) {
10173 state = (state_t *) stackPop (todo);
10174 stackPush (done, state);
10175 curr = state->flow;
10176 res = state->lastdef;
10177 //fprintf (stderr, "searching def of sym %s in pcFlow %p (lastdef %x @ %p)\n", strFromSym(sym), curr, res ? res->val : 0, res ? res->pc : NULL);
10179 /* there are no definitions BEFORE pc in pc's flow (see above) */
10180 if (curr == PCI(pc)->pcflow) {
10182 //fprintf (stderr, "symbol %s(%x) might be used uninitialized at %p\n", strFromSym(sym), sym, pc);
10183 res = pic16_pBlockAddInval (pc->pb, sym);
10184 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10187 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10188 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10192 /* save last definition of sym in this flow as initial def in successors */
10193 res = defmapFindDef (curr->defmap, sym, NULL);
10194 if (!res) res = state->lastdef;
10196 /* add successors to working list */
10197 state = newState (NULL, NULL);
10198 succ = (pCodeFlowLink *) setFirstItem (curr->to);
10200 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10201 state->flow = succ->pcflow;
10202 state->lastdef = res;
10203 if (stateIsNew (state, todo, done)) {
10204 stackPush (todo, state);
10205 state = newState (NULL, NULL);
10207 succ = (pCodeFlowLink *) setNextItem (curr->to);
10209 deleteState (state);
10212 #else // !FORWARD_FLOW_ANALYSIS
10214 /* no definition found in pc's flow preceeding pc */
10215 todo = newStack ();
10216 done = newStack ();
10217 n_defs = 0; firstState = 1;
10218 stackPush (todo, newState (PCI(pc)->pcflow, res));
10220 while (!stackIsEmpty (todo)) {
10221 state = (state_t *) stackPop (todo);
10222 curr = state->flow;
10226 /* only check predecessor flows */
10228 /* get (last) definition of sym in this flow */
10229 res = defmapFindDef (curr->defmap, sym, NULL);
10233 /* definition found */
10234 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10235 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10237 /* no definition found -- check predecessor flows */
10238 state = newState (NULL, NULL);
10239 succ = (pCodeFlowLink *) setFirstItem (curr->from);
10241 /* if no flow predecessor available -- sym might be uninitialized */
10243 //fprintf (stder, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10244 res = newDefmap (sym, 0xff, 0, 1, NULL, 0, *chain);
10245 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10246 deleteDefmap (res); res = NULL;
10250 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10251 state->flow = succ->pcflow;
10252 state->lastdef = res;
10253 if (stateIsNew (state, todo, done)) {
10254 stackPush (todo, state);
10255 state = newState (NULL, NULL);
10257 succ = (pCodeFlowLink *) setNextItem (curr->from);
10259 deleteState (state);
10265 /* clean up done stack */
10266 while (!stackIsEmpty(done)) {
10267 deleteState ((state_t *) stackPop (done));
10269 deleteStack (done);
10271 /* return number of items in result set */
10273 //fprintf (stderr, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10274 } else if (n_defs == 1) {
10276 //fprintf (stderr, "sym %s at %p always defined as %x @ %p\n", strFromSym(sym), pc, (*chain)->val, (*chain)->pc);
10277 } else if (n_defs > 0) {
10278 //fprintf (stderr, "%u definitions for sym %s at %p found:\n", n_defs, strFromSym(sym), pc);
10282 fprintf (stderr, " as %4x @ %p\n", res->val, res->pc);
10287 //fprintf (stderr, "%u definitions for sym %s at %p found\n", n_defs, strFromSym(sym), pc);
10288 df_findall_otherflow++;
10292 /* ======================================================================== */
10293 /* === VALUE NUMBER HANDLING ============================================== */
10294 /* ======================================================================== */
10296 static valnum_t nextValnum = 0x1000;
10297 static hTab *map_symToValnum = NULL;
10299 /** Return a new value number. */
10300 static inline valnum_t newValnum () {
10301 return (nextValnum += 4);
10304 static valnum_t valnumFromStr (const char *str) {
10309 sym = symFromStr (str);
10311 if (!map_symToValnum) {
10312 map_symToValnum = newHashTable (128);
10315 /* literal already known? */
10316 res = hTabFindByKey (map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), &ptrcmp);
10318 /* return existing valnum */
10319 if (res) return (valnum_t) PTR_TO_INT(res);
10321 /* create new valnum */
10323 hTabAddItemLong (&map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), INT_TO_PTR(val));
10327 /* Create a valnum for a literal. */
10328 static valnum_t valnumFromLit (unsigned int lit) {
10329 return ((valnum_t) 0x100 + (lit & 0x0FF));
10332 /* Return the (positive) literal value represented by val
10333 * or -1 iff val is no known literal's valnum. */
10334 static int litFromValnum (valnum_t val) {
10335 if (val >= 0x100 && val < 0x200) {
10336 /* valnum is a (known) literal */
10337 return val & 0x00FF;
10339 /* valnum is not a known literal */
10345 /* Sanity check - all flows in a block must be reachable from initial flow. */
10346 static int verifyAllFlowsReachable (pBlock *pb) {
10352 pCodeFlowLink *succ;
10355 //fprintf (stderr, "%s - started for %s.\n" ,__FUNCTION__, pic16_pBlockGetFunctionName (pb));
10358 flowInBlock = NULL;
10360 /* mark initial flow as reached (and "not needs to be reached") */
10361 pc = pic16_findNextpCode (pb->pcHead, PC_FLOW);
10363 addSetHead (&reached, pc);
10364 addSetHead (&checked, pc);
10366 /* mark all further flows in block as "need to be reached" */
10369 if (isPCI(pc)) addSetIfnotP (&flowInBlock, PCI(pc)->pcflow);
10370 pc = pic16_findNextInstruction (pc->next);
10373 while (reached && (pcfl = (pCodeFlow *)indexSet (reached, 0)) != NULL) {
10374 /* mark as reached and "not need to be reached" */
10375 deleteSetItem (&reached, pcfl);
10376 //fprintf (stderr, "%s - checking %p\n" ,__FUNCTION__, pcfl);
10378 /* flow is no longer considered unreachable */
10379 deleteSetItem (&flowInBlock, pcfl);
10381 for (succ = setFirstItem (pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10382 if (!isinSet (checked, succ->pcflow)) {
10383 /* flow has never been reached before */
10384 addSetHead (&reached, succ->pcflow);
10385 addSetHead (&checked, succ->pcflow);
10390 //fprintf (stderr, "%s - finished\n", __FUNCTION__);
10392 /* by now every flow should have been reached
10393 * --> flowInBlock should be empty */
10394 res = (flowInBlock == NULL);
10398 fprintf (stderr, "not all flows reached in %s:\n", pic16_pBlockGetFunctionName (pb));
10399 while (flowInBlock) {
10400 pcfl = indexSet (flowInBlock, 0);
10401 fprintf (stderr, "not reached: flow %p\n", pcfl);
10402 deleteSetItem (&flowInBlock, pcfl);
10408 deleteSet (&reached);
10409 deleteSet (&flowInBlock);
10410 deleteSet (&checked);
10412 /* if we reached every flow, succ is NULL by now... */
10413 //assert (res); // will fire on unreachable code...
10418 /* Checks a flow for accesses to sym AFTER pc.
10420 * Returns -1 if the symbol is read in this flow (before redefinition),
10421 * returns 0 if the symbol is redefined in this flow or
10422 * returns a mask [0x01 -- 0xFF] indicating the bits still alive after this flow.
10424 int pic16_isAliveInFlow (symbol_t sym, int mask, pCodeFlow *pcfl, pCode *pc) {
10425 defmap_t *map, *mappc;
10427 /* find pc or start of definitions */
10428 map = pcfl->defmap;
10429 while (map && (map->pc != pc) && map->next) map = map->next;
10430 /* if we found pc -- ignore it */
10431 while (map && map->pc == pc) map = map->prev;
10433 /* scan list backwards (first definition first) */
10434 while (map && mask) {
10435 // if (map->sym == sym) {
10436 //fprintf (stderr, "%s: accessing sym %s in pc %p/map %p\n", __FUNCTION__, strFromSym(sym), map->pc, map);
10438 /* scan list for reads at this pc first */
10439 while (map && map->pc == mappc->pc) {
10440 /* is the symbol (partially) read? */
10441 if ((map->sym == sym) && (map->acc.access.isRead && ((map->acc.access.in_mask & mask) != 0))) {
10442 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s read at pc %p\n", __FUNCTION__, strFromSym (sym), map->pc);
10449 while (map && map->pc == mappc->pc) {
10450 /* honor (partial) redefinitions of sym */
10451 if ((map->sym == sym) && (map->acc.access.isWrite)) {
10452 mask &= ~map->acc.access.mask;
10453 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s redefined at pc %p, alive mask: %x\n", __FUNCTION__, strFromSym (sym), map->pc, mask);
10458 /* map already points to the first defmap for the next pCode */
10459 //map = mappc->prev;
10462 /* the symbol is not completely redefined in this flow and not accessed -- symbol
10463 * is still alive; return the appropriate mask of alive bits */
10467 /* Check whether a symbol is alive (AFTER pc). */
10468 static int pic16_isAlive (symbol_t sym, pCode *pc) {
10471 dynstack_t *todo, *done;
10474 pCodeFlowLink *succ;
10478 assert (isPCI(pc));
10479 pcfl = PCI(pc)->pcflow;
10480 map = pcfl->defmap;
10482 todo = newStack ();
10483 done = newStack ();
10485 state = newState (pcfl, (defmap_t *) INT_TO_PTR(mask));
10486 stackPush (todo, state);
10489 while (!stackIsEmpty (todo)) {
10490 state = (state_t *) stackPop (todo);
10491 pcfl = state->flow;
10492 mask = PTR_TO_INT(state->lastdef);
10493 if (visit) stackPush (done, state); else deleteState(state);
10494 //fprintf (stderr, "%s: checking flow %p for symbol %s (%x)/%x\n", __FUNCTION__, pcfl, strFromSym(sym), sym, mask);
10495 // make sure flows like A(i1,i2,pc,i3,...) --> A with pc reading and writing sym are handled correctly!
10496 mask = pic16_isAliveInFlow (sym, mask, pcfl, visit == 0 ? pc : NULL);
10499 /* symbol is redefined in flow before use -- not alive in this flow (maybe in others?) */
10500 if (mask == 0) continue;
10502 /* symbol is (partially) read before redefinition in flow */
10503 if (mask == -1) break;
10505 /* symbol is neither read nor completely redefined -- check successor flows */
10506 for (succ = setFirstItem(pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10507 state = newState (succ->pcflow, (defmap_t *) INT_TO_PTR(mask));
10508 if (stateIsNew (state, todo, done)) {
10509 stackPush (todo, state);
10511 deleteState (state);
10516 while (!stackIsEmpty (todo)) deleteState ((state_t *) stackPop (todo));
10517 while (!stackIsEmpty (done)) deleteState ((state_t *) stackPop (done));
10519 /* symbol is read in at least one flow -- is alive */
10520 if (mask == -1) return 1;
10522 /* symbol is read in no flow */
10526 /* Returns whether access to the given symbol has side effects. */
10527 static int pic16_symIsSpecial (symbol_t sym) {
10528 //fprintf (stderr, "%s: sym=%x\n", __FUNCTION__, sym);
10548 /* no special effects known */
10555 /* Check whether a register should be considered local (to the current function) or not. */
10556 static int pic16_regIsLocal (regs *r) {
10559 sym = symFromStr (r->name);
10562 case SPO_FSR0L: // used in ptrget/ptrput
10563 case SPO_FSR0H: // ... as well
10564 case SPO_FSR1L: // used as stack pointer... (so not really local but shared among function calls)
10565 case SPO_FSR1H: // ... as well
10566 case SPO_FSR2L: // used as frame pointer
10567 case SPO_FSR2H: // ... as well
10568 case SPO_PRODL: // used to return values from functions
10569 case SPO_PRODH: // ... as well
10570 /* these registers (and some more...) are considered local */
10574 /* for unknown regs: check is marked local, leave if not */
10578 //fprintf (stderr, "%s: non-local reg used: %s\n", __FUNCTION__, r->name);
10584 /* if in doubt, assume non-local... */
10588 /* Check all symbols touched by pc whether their newly assigned values are read.
10589 * Returns 0 if no symbol is used later on, 1 otherwise. */
10590 static int pic16_pCodeIsAlive (pCode *pc) {
10591 pCodeInstruction *pci;
10592 defmap_t *map, *lastpc;
10595 /* we can only handle PCIs */
10596 if (!isPCI(pc)) return 1;
10598 //pc->print (stderr, pc);
10601 assert (pci && pci->pcflow && pci->pcflow->defmap);
10603 /* NEVER remove instructions with implicit side effects */
10606 case POC_TBLRD_POSTINC: /* modify TBLPTRx */
10607 case POC_TBLRD_POSTDEC:
10608 case POC_TBLRD_PREINC:
10609 case POC_TBLWT: /* modify program memory */
10610 case POC_TBLWT_POSTINC: /* modify TBLPTRx */
10611 case POC_TBLWT_POSTDEC:
10612 case POC_TBLWT_PREINC:
10613 case POC_CLRWDT: /* clear watchdog timer */
10614 case POC_PUSH: /* should be safe to remove though... */
10615 case POC_POP: /* should be safe to remove though... */
10620 //fprintf (stderr, "%s: instruction with implicit side effects not removed: %s\n", __FUNCTION__, pci->mnemonic);
10624 /* no special instruction */
10628 /* prevent us from removing assignments to non-local variables */
10630 if (PCI(pc)->outCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10631 else if (PCI(pc)->outCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10633 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10634 /* assignment to DIRECT operand like "BSF (_global + 1),6" */
10635 //fprintf (stderr, "%s: assignment to register detected, but register not available!\n", __FUNCTION__);
10636 //pc->print (stderr, pc);
10639 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10640 //fprintf (stderr, "%s: dest-reg not local %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10645 /* OVERKILL: prevent us from removing reads from non-local variables
10646 * THIS IS HERE TO AVOID PROBLEMS WITH VOLATILE OPERANDS ONLY!
10647 * Once registers get a "isVolatile" field this might be handled more efficiently... */
10649 if (PCI(pc)->inCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10650 else if (PCI(pc)->inCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10652 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10653 /* read from DIRECT operand like "BTFSS (_global + 1),6" -- might be volatile */
10654 //fprintf (stderr, "%s: read from register detected, but register not available!\n", __FUNCTION__);
10655 //pc->print (stderr, pc);
10658 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10659 //fprintf (stderr, "%s: src-reg not local: %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10664 /* now check that the defined symbols are not used */
10665 map = pci->pcflow->defmap;
10667 /* find items for pc */
10668 while (map && map->pc != pc) map = map->next;
10670 /* no entries found? something is fishy with DF analysis... -- play safe */
10671 if (!map) { fprintf (stderr, "%s: defmap not found\n", __FUNCTION__); return 1; }
10673 /* remember first item assigned to pc for later use */
10676 /* check all symbols being modified by pc */
10677 while (map && map->pc == pc) {
10678 if (map->sym == 0) { map = map->next; continue; }
10680 /* keep pc if it references special symbols (like POSTDEC0) */
10684 pic16_pCode2str (buf, 256, pc);
10685 fprintf (stderr, "%s: checking for sym %x(%s) at pc %p (%s)\n", __FUNCTION__, map->sym, strFromSym (map->sym), pc, buf);
10688 if (pic16_symIsSpecial (map->sym)) {
10689 //fprintf (stderr, "%s: special sym\n", __FUNCTION__);
10692 if (map->acc.access.isWrite) {
10693 if (pic16_isAlive (map->sym, pc)) {
10694 //fprintf (stderr, "%s(%s): pCode is alive (sym %s still used)\n", __FUNCTION__, pic16_pBlockGetFunctionName (pc->pb),strFromSym (map->sym));
10701 /* no use for any of the pc-assigned symbols found -- pCode is dead and can be removed */
10705 pic16_pCode2str (buf, 256, pc);
10706 fprintf (stderr, "%s: pCode %p (%s) is dead.\n", __FUNCTION__, pc, buf);
10712 /* Adds implied operands to the list.
10713 * sym - operand being accessed in the pCode
10714 * list - list to append the operand
10715 * isRead - set to 1 iff sym is read in pCode
10716 * listRead - set to 1 iff all operands being read are to be listed
10718 * Returns 0 for "normal" operands, 1 for special operands.
10720 static int fixupSpecialOperands (symbol_t sym, int in_mask, int mask, pCode *pc, valnum_t val, defmap_t **list, int isRead, int isWrite) {
10721 /* check whether accessing REG accesses other REGs as well */
10725 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10726 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10727 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10731 /* reads FSR0x and WREG */
10732 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10733 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10734 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10735 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10741 /* reads/modifies FSR0x */
10742 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10743 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10744 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10749 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10750 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10751 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10755 /* reads FSR1x and WREG */
10756 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10757 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10758 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10759 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10765 /* reads/modifies FSR1x */
10766 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10767 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10768 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10773 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10774 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10775 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10779 /* reads FSR2x and WREG */
10780 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10781 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10782 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10783 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10789 /* reads/modifies FSR2x */
10790 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10791 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10792 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10796 /* modifies PCLATH and PCLATU */
10797 *list = newDefmap (SPO_PCL, 0xff, 0xff, isRead, isWrite, pc, newValnum (), *list);
10799 /* reading PCL updates PCLATx */
10800 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10801 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10804 /* writing PCL implicitly reads PCLATx (computed GOTO) */
10805 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 1, 0, pc, 0, *list);
10806 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 1, 0, pc, 0, *list);
10811 *list = newDefmap (sym, in_mask, mask, isRead, isWrite, pc, val, *list);
10812 /* nothing special */
10817 /* has been a special operand */
10821 static symbol_t pic16_fsrsym_idx[][2] = {
10822 {SPO_FSR0L, SPO_FSR0H},
10823 {SPO_FSR1L, SPO_FSR1H},
10824 {SPO_FSR2L, SPO_FSR2H}
10827 /* Merge multiple defmap entries for the same symbol for list's pCode. */
10828 static void mergeDefmapSymbols (defmap_t *list) {
10829 defmap_t *ref, *curr, *temp;
10831 /* now make sure that each symbol occurs at most once per pc */
10833 while (ref && (ref->pc == list->pc)) {
10835 while (curr && (curr->pc == list->pc)) {
10836 if (curr->sym == ref->sym) {
10837 //fprintf (stderr, "Merging defmap entries for symbol %s\n", strFromSym (ref->sym));
10838 /* found a symbol occuring twice... merge the two */
10839 if (curr->acc.access.isRead) {
10840 //if (ref->acc.access.isRead) fprintf (stderr, "symbol %s was marked twice as read at pc %p\n", strFromSym (ref->sym), ref->pc);
10841 ref->acc.access.isRead = 1;
10842 ref->acc.access.in_mask |= curr->acc.access.in_mask;
10844 if (curr->acc.access.isWrite) {
10845 //if (ref->acc.access.isWrite) fprintf (stderr, "symbol %s was marked twice as written at pc %p\n", strFromSym (ref->sym), ref->pc);
10846 ref->acc.access.isWrite = 1;
10847 ref->acc.access.mask |= curr->acc.access.mask;
10851 deleteDefmap (temp);
10852 continue; // do not skip curr!
10860 /** Prepend list with the reads and definitions performed by pc. */
10861 static defmap_t *createDefmap (pCode *pc, defmap_t *list) {
10862 pCodeInstruction *pci;
10863 int cond, inCond, outCond;
10864 int mask = 0xff, smask;
10865 int isSpecial, isSpecial2;
10866 symbol_t sym, sym2;
10870 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
10871 /* TODO: mark this defmap node as an ASMDIR -- any values might be read/modified */
10872 fprintf (stderr, "ASMDIRs not supported by data flow analysis!\n");
10873 list = newDefmap (0, 0xff, 0xff, 0, 0, pc, 0, list);
10876 assert (isPCI(pc));
10879 /* handle bit instructions */
10880 if (pci->isBitInst) {
10881 assert (pci->pcop->type == PO_GPR_BIT);
10882 mask = 1U << (PCORB(PCI(pc)->pcop)->bit);
10885 /* handle (additional) implicit arguments */
10891 lit = PCOL(pci->pcop)->lit;
10892 assert (lit >= 0 && lit < 3);
10893 //fprintf (stderr, "LFSR: %s // %s\n", pci->pcop->name, ((pCodeOpLit2 *)(pci->pcop))->arg2->name);
10894 val = valnumFromStr (((pCodeOpLit2 *)(pci->pcop))->arg2->name);
10895 //fprintf (stderr, "LFSR lit=%u, symval=%4x\n", lit, val);
10896 list = newDefmap (pic16_fsrsym_idx[lit][0], 0x00, 0xff, 0, 1, pc, val, list);
10897 list = newDefmap (pic16_fsrsym_idx[lit][1], 0x00, 0xff, 0, 1, pc, val+1, list); // val+1 is guaranteed not be used as a valnum...
10901 case POC_MOVLB: // BSR
10902 case POC_BANKSEL: // BSR
10903 list = newDefmap (SPO_BSR, 0x00, 0xff, 0, 1, pc, valnumFromStr (pic16_get_op (((pCodeOpLit2 *)(pci->pcop))->arg2, NULL, 0)), list);
10906 case POC_MULWF: // PRODx
10907 case POC_MULLW: // PRODx
10908 list = newDefmap (SPO_PRODH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10909 list = newDefmap (SPO_PRODL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10912 case POC_POP: // TOS, STKPTR
10913 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10914 list = newDefmap (SPO_TOSL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10915 list = newDefmap (SPO_TOSH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10916 list = newDefmap (SPO_TOSU, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10919 case POC_PUSH: // STKPTR
10920 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10921 list = newDefmap (SPO_TOSL, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10922 list = newDefmap (SPO_TOSH, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10923 list = newDefmap (SPO_TOSU, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10926 case POC_CALL: // return values (and arguments?): WREG, PRODx, FSR0L
10927 case POC_RCALL: // return values (and arguments?): WREG, PRODx, FSR0L
10928 list = newDefmap (SPO_WREG, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10929 list = newDefmap (SPO_PRODL, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10930 list = newDefmap (SPO_PRODH, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10931 list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10933 /* needs correctly set-up stack pointer */
10934 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10935 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10938 case POC_RETLW: // return values: WREG, PRODx, FSR0L
10939 /* pseudo read on (possible) return values */
10940 // WREG is handled below via outCond
10941 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
10942 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
10943 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
10945 /* caller's stack pointers must be restored */
10946 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10947 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10948 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
10949 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
10952 case POC_RETURN: // return values; WREG, PRODx, FSR0L
10953 case POC_RETFIE: // return value: WREG, PRODx, FSR0L
10954 /* pseudo read on (possible) return values */
10955 list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, list);
10956 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
10957 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
10958 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
10960 /* caller's stack pointers must be restored */
10961 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10962 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10963 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
10964 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
10968 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
10969 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
10970 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
10971 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
10974 case POC_TBLRD_POSTINC:
10975 case POC_TBLRD_POSTDEC:
10976 case POC_TBLRD_PREINC:
10977 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10978 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10979 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10980 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
10984 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
10985 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
10986 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
10987 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
10990 case POC_TBLWT_POSTINC:
10991 case POC_TBLWT_POSTDEC:
10992 case POC_TBLWT_PREINC:
10993 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10994 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10995 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10996 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
11000 /* many instruction implicitly read BSR... -- THIS IS IGNORED! */
11004 /* handle explicit arguments */
11005 inCond = pci->inCond;
11006 outCond = pci->outCond;
11007 cond = inCond | outCond;
11008 if (cond & PCC_W) {
11009 list = newDefmap (symFromStr ("WREG"), mask, mask, inCond & PCC_W, outCond & PCC_W, pc, newValnum (), list);
11012 /* keep STATUS read BEFORE STATUS write in the list (still neccessary?) */
11013 if (inCond & PCC_STATUS) {
11015 if (inCond & PCC_C) smask |= 1U << PIC_C_BIT;
11016 if (inCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11017 if (inCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11018 if (inCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11019 if (inCond & PCC_N) smask |= 1U << PIC_N_BIT;
11021 list = newDefmap (symFromStr ("STATUS"), smask, 0x00, 1, 0, pc, 0, list);
11022 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11025 if (outCond & PCC_STATUS) {
11027 if (outCond & PCC_C) smask |= 1U << PIC_C_BIT;
11028 if (outCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11029 if (outCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11030 if (outCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11031 if (outCond & PCC_N) smask |= 1U << PIC_N_BIT;
11033 list = newDefmap (symFromStr ("STATUS"), 0x00, smask, 0, 1, pc, newValnum (), list);
11034 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11037 isSpecial = isSpecial2 = 0;
11039 if (cond & PCC_REGISTER) {
11040 name = pic16_get_op (pci->pcop, NULL, 0);
11041 sym = symFromStr (name);
11042 isSpecial = fixupSpecialOperands (sym, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER, outCond & PCC_REGISTER);
11043 //fprintf (stderr, "pc %p: def REG %s(%x) & %02x\n", pc, name, sym, mask);
11046 if (cond & PCC_REGISTER2) {
11047 name = pic16_get_op2 (pci->pcop, NULL, 0);
11048 sym2 = symFromStr (name);
11049 isSpecial2 = fixupSpecialOperands (sym2, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER2, outCond & PCC_REGISTER2);
11050 //fprintf (stderr, "pc %p: def REG2 %s(%x) & %02x\n", pc, name, sym2, mask);
11054 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
11055 list = newDefmap (0, 0x00, 0x00, 0, 0, pc, 0, list);
11057 mergeDefmapSymbols (list);
11063 static void printDefmap (defmap_t *map) {
11067 fprintf (stderr, "defmap @ %p:\n", curr);
11069 fprintf (stderr, "%s%s: %4x|%4x / %02x|%02x, sym %s(%x) @ pc %p\n",
11070 curr->acc.access.isRead ? "R" : " ",
11071 curr->acc.access.isWrite ? "W": " ",
11072 curr->in_val, curr->val,
11073 curr->acc.access.in_mask, curr->acc.access.mask,
11074 strFromSym(curr->sym), curr->sym,
11078 fprintf (stderr, "<EOL>\n");
11082 /* Add "additional" definitions to uniq.
11083 * This can be used to merge the in_values and the flow's defmap to create an in_value-list for the flow's successors.
11084 * This can also be used to create a uniq (out)list from a flow's defmap by passing *uniq==NULL.
11086 * If symbols defined in additional are not present in uniq, a definition is created.
11087 * Otherwise the present definition is altered to reflect the newer assignments.
11089 * flow: <uniq> --> assign1 --> assign2 --> assign3 --> ... --> <uniq'>
11090 * before `------- noted in additional --------' after
11092 * I assume that each symbol occurs AT MOST ONCE in uniq.
11095 static int defmapUpdateUniqueSym (defmap_t **uniq, defmap_t *additional) {
11100 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *uniq, additional);
11101 /* find tail of additional list (holds the first assignment) */
11103 while (curr && curr->next) curr = curr->next;
11107 /* find next assignment in additionals */
11108 while (curr && !curr->acc.access.isWrite) curr = curr->prev;
11112 /* find item in uniq */
11114 //printDefmap (*uniq);
11115 while (old && (old->sym != curr->sym)) old = old->next;
11118 /* definition found -- replace */
11119 if (old->val != curr->val) {
11120 old->val = curr->val;
11124 /* new definition */
11125 *uniq = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, curr->val, *uniq);
11132 /* return 0 iff uniq remained unchanged */
11136 /* Creates the in_value list of a flow by (iteratively) merging the out_value
11137 * lists of its predecessor flows.
11138 * Initially *combined should be NULL, alt_in will be copied to combined.
11139 * If *combined != NULL, combined will be altered:
11140 * - for symbols defined in *combined but not in alt_in,
11141 * *combined is altered to 0 (value unknown, either *combined or INIT).
11142 * - for symbols defined in alt_in but not in *combined,
11143 * a 0 definition is created (value unknown, either INIT or alt).
11144 * - for symbols defined in both, *combined is:
11145 * > left unchanged if *combined->val == alt_in->val or
11146 * > modified to 0 otherwise (value unknown, either alt or *combined).
11148 * I assume that each symbol occurs AT MOST ONCE in each list!
11150 static int defmapCombineFlows (defmap_t **combined, defmap_t *alt_in, pBlock *pb) {
11156 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *combined, alt_in);
11158 if (!(*combined)) {
11159 return defmapUpdateUniqueSym (combined, alt_in);
11162 /* merge the two */
11165 /* find symbols definition in *combined */
11167 while (old && (old->sym != curr->sym)) old = old->next;
11170 /* definition found */
11171 if (old->val && (old->val != curr->val)) {
11172 old->val = 0; /* value unknown */
11176 /* no definition found -- can be either INIT or alt_in's value */
11177 val = pic16_pBlockAddInval (pb, curr->sym)->val;
11178 *combined = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, (val == curr->val) ? val : 0, *combined);
11179 if (val != curr->val) change++;
11185 /* update symbols from *combined that are NOT defined in alt_in -- can be either *combined's value or INIT */
11188 if (old->val != 0) {
11189 /* find definition in alt_in */
11191 while (curr && curr->sym != old->sym) curr = curr->next;
11193 /* symbol defined in *combined only -- can be either INIT or *combined */
11194 val = pic16_pBlockAddInval (pb, old->sym)->val;
11195 if (old->val != val) {
11208 static int defmapCompareUnique (defmap_t *map1, defmap_t *map2) {
11209 defmap_t *curr1, *curr2;
11212 /* identical maps are equal */
11213 if (map1 == map2) return 0;
11215 if (!map1) return -1;
11216 if (!map2) return 1;
11218 //fprintf (stderr, "%s: comparing %p & %p\n", __FUNCTION__, map1, map2);
11223 while (curr1 && curr2) {
11224 curr1 = curr1->next;
11225 curr2 = curr2->next;
11228 /* one of them longer? */
11229 if (curr1) return 1;
11230 if (curr2) return -1;
11232 /* both lists are of equal length -- compare (in O(n^2)) */
11237 while (curr2 && curr2->sym != sym) curr2 = curr2->next;
11238 if (!curr2) return 1; // symbol not found in curr2
11239 if (curr2->val != curr1->val) return 1; // values differ
11241 /* compare next symbol */
11242 curr1 = curr1->next;
11245 /* no difference found */
11250 /* Prepare a list of all reaching definitions per flow.
11251 * This is done using a forward dataflow analysis.
11253 static void createReachingDefinitions (pBlock *pb) {
11254 defmap_t *out_vals, *in_vals;
11257 pCodeFlowLink *link;
11261 /* initialize out_vals to unique'fied defmaps per pCodeFlow */
11262 for (pc = pic16_findNextInstruction (pb->pcHead); pc; pc = pic16_findNextInstruction (pc->next)) {
11264 deleteDefmapChain (&PCFL(pc)->in_vals);
11265 deleteDefmapChain (&PCFL(pc)->out_vals);
11266 defmapUpdateUniqueSym (&PCFL(pc)->out_vals, PCFL(pc)->defmap);
11270 pc = pic16_findNextInstruction (pb->pcHead);
11271 todo = NULL; blacklist = NULL;
11272 addSetHead (&todo, PCI(pc)->pcflow);
11274 //fprintf (stderr, "%s: function %s()\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11275 while (elementsInSet (todo)) {
11276 //fprintf (stderr, "%u items in todo-set\n", elementsInSet (todo));
11277 pcfl = PCFL(indexSet (todo, 0));
11278 deleteSetItem (&todo, pcfl);
11279 //fprintf (stderr, "%s: checking %p\n", __FUNCTION__, pcfl);
11283 if (isinSet (blacklist, pcfl)) {
11284 fprintf (stderr, "ignoring blacklisted flow\n");
11288 /* create in_vals from predecessors out_vals */
11289 link = setFirstItem (pcfl->from);
11291 defmapCombineFlows (&in_vals, link->pcflow->out_vals, pb);
11292 link = setNextItem (pcfl->from);
11295 //printDefmap (in_vals);
11296 //printDefmap (pcfl->in_vals);
11298 if (!pcfl->in_vals || !pcfl->out_vals || defmapCompareUnique (in_vals, pcfl->in_vals)) {
11299 //fprintf (stderr, "in_vals changed\n");
11300 /* in_vals changed -- update out_vals */
11301 deleteDefmapChain (&pcfl->in_vals);
11302 pcfl->in_vals = in_vals;
11304 /* create out_val from in_val and defmap */
11306 defmapUpdateUniqueSym (&out_vals, in_vals);
11307 defmapUpdateUniqueSym (&out_vals, pcfl->defmap);
11309 /* is out_vals different from pcfl->out_vals */
11310 if (!pcfl->out_vals || defmapCompareUnique (out_vals, pcfl->out_vals)) {
11311 //fprintf (stderr, "out_vals changed\n");
11312 deleteDefmapChain (&pcfl->out_vals);
11313 pcfl->out_vals = out_vals;
11315 if (pcfl->out_vals == NULL && pcfl->in_vals == NULL) {
11316 addSet (&blacklist, pcfl);
11319 /* reschedule all successors */
11320 link = setFirstItem (pcfl->to);
11322 //fprintf (stderr, " %p --> %p\n", pcfl, link->pcflow);
11323 addSetIfnotP (&todo, link->pcflow);
11324 link = setNextItem (pcfl->to);
11327 deleteDefmapChain (&out_vals);
11330 deleteDefmapChain (&in_vals);
11336 static void showAllDefs (symbol_t sym, pCode *pc) {
11340 assert (isPCI(pc));
11341 count = defmapFindAll (sym, pc, &map);
11343 fprintf (stderr, "sym %s(%x) @ %p defined as (val@pc): ", strFromSym(sym), sym, pc);
11346 fprintf (stderr, "(%x @ %p) ", map->val, map->pc);
11349 pic16_pCode2str (buf, 256, map->pc);
11350 fprintf (stderr, "\n (%x @ %p(%s)) ", map->val, map->pc, buf);
11354 deleteDefmapChain (&map);
11358 /* safepCodeUnlink and remove pc from defmap. */
11359 static int pic16_safepCodeRemove (pCode *pc, char *comment) {
11360 defmap_t *map, *next, **head;
11364 map = isPCI(pc) ? PCI(pc)->pcflow->defmap : NULL;
11365 head = isPCI(pc) ? &PCI(pc)->pcflow->defmap : NULL;
11366 res = pic16_safepCodeUnlink (pc, comment);
11369 /* remove pc from defmap */
11372 if (map->pc == pc) {
11373 if (!map->prev && head) *head = map->next;
11374 deleteDefmap (map);
11383 void pic16_fixDefmap (pCode *pc, pCode *newpc) {
11385 /* This breaks the defmap chain's references to pCodes... fix it! */
11386 map = PCI(pc)->pcflow->defmap;
11388 while (map && map->pc != pc) map = map->next;
11390 while (map && map->pc == pc) {
11396 /* Replace a defmap entry for sym with newsym for read accesses (isRead == 1) or
11397 * write accesses (isRead == 0). */
11398 void defmapReplaceSymRef (pCode *pc, symbol_t sym, symbol_t newsym, int isRead) {
11399 defmap_t *map, *map_start;
11401 if (!isPCI(pc)) return;
11402 if (sym == newsym) return;
11404 map = PCI(pc)->pcflow->defmap;
11406 while (map && map->pc != pc) map = map->next;
11408 while (map && map->pc == pc) {
11409 if (map->sym == sym) {
11410 assert ((isRead && map->acc.access.isRead) || ((!isRead) && (map->acc.access.isWrite)));
11411 if (!(map->acc.access.isRead && map->acc.access.isWrite)) {
11412 /* only one kind of access handled... this is easy */
11415 /* must copy defmap entry before replacing symbol... */
11416 copy = copyDefmap (map);
11418 map->acc.access.isRead = 0;
11419 copy->acc.access.isWrite = 0;
11421 map->acc.access.isWrite = 0;
11422 copy->acc.access.isRead = 0;
11424 copy->sym = newsym;
11425 /* insert copy into defmap chain */
11426 defmapInsertAfter (map, copy);
11432 /* as this might introduce multiple defmap entries for newsym... */
11433 mergeDefmapSymbols (map_start);
11436 /* Assign "better" valnums to results. */
11437 static void assignValnums (pCode *pc) {
11438 pCodeInstruction *pci;
11440 symbol_t sym1, sym2;
11441 int cond, isSpecial1, isSpecial2, count, mask, lit;
11442 defmap_t *list, *val, *oldval, *dummy;
11443 regs *reg1 = NULL, *reg2 = NULL;
11446 /* only works for pCodeInstructions... */
11447 if (!isPCI(pc)) return;
11450 cond = pci->inCond | pci->outCond;
11451 list = pci->pcflow->defmap;
11452 sym1 = sym2 = isSpecial1 = isSpecial2 = 0;
11454 if (cond & PCC_REGISTER) {
11455 sym1 = symFromStr (pic16_get_op (pci->pcop, NULL, 0));
11456 reg1 = pic16_getRegFromInstruction (pc);
11457 isSpecial1 = pic16_symIsSpecial (sym1);
11459 if (cond & PCC_REGISTER2) {
11460 sym2 = symFromStr (pic16_get_op2 (pci->pcop, NULL, 0));
11461 reg2 = pic16_getRegFromInstruction (pc);
11462 isSpecial2 = pic16_symIsSpecial (sym2);
11465 /* determine input values */
11467 while (val && val->pc != pc) val = val->next;
11468 //list = val; /* might save some time later... */
11469 while (val && val->pc == pc) {
11471 if (val->sym != 0 && (1 || val->acc.access.isRead)) {
11472 /* get valnum for sym */
11473 count = defmapFindAll (val->sym, pc, &oldval);
11474 //fprintf (stderr, "%d defs for sym %s\n", count, strFromSym (val->sym));
11476 if ((val->acc.access.in_mask & oldval->acc.access.mask) == val->acc.access.in_mask) {
11477 val->in_val = oldval->val;
11481 } else if (count == 0) {
11482 /* no definition found */
11485 /* multiple definition(s) found -- value not known (unless always the same valnum) */
11487 dummy = oldval->next;
11488 mask = oldval->acc.access.mask;
11489 val->in_val = oldval->val;
11490 while (dummy && (dummy->val == val->in_val)) {
11491 mask &= dummy->acc.access.mask;
11492 dummy = dummy->next;
11495 /* found other values or to restictive mask */
11496 if (dummy || ((mask & val->acc.access.in_mask) != val->acc.access.in_mask)) {
11500 if (count > 0) deleteDefmapChain (&oldval);
11505 /* handle valnum assignment */
11507 case POC_CLRF: /* modifies STATUS (Z) */
11508 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11509 oldval = defmapCurr (list, sym1, pc);
11510 if (oldval && (litFromValnum (oldval->in_val) == 0)) {
11511 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11512 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant CLRF removed");
11514 defmapUpdate (list, sym1, pc, valnumFromLit(0));
11518 case POC_SETF: /* SETF does not touch STATUS */
11519 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11520 oldval = defmapCurr (list, sym1, pc);
11521 if (oldval && (litFromValnum (oldval->in_val) == 0x00FF)) {
11522 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11523 pic16_safepCodeRemove (pc, "=DF= redundant SETF removed");
11525 defmapUpdate (list, sym1, pc, valnumFromLit (0x00FF));
11529 case POC_MOVLW: /* does not touch STATUS */
11530 oldval = defmapCurr (list, SPO_WREG, pc);
11531 if (pci->pcop->type == PO_LITERAL) {
11532 //fprintf (stderr, "MOVLW: literal %u\n", PCOL(pci->pcop)->lit);
11533 litnum = valnumFromLit ((unsigned char)PCOL(pci->pcop)->lit);
11535 //fprintf (stderr, "MOVLW: %s\n", pic16_get_op (pci->pcop, NULL, 0));
11536 litnum = valnumFromStr (pic16_get_op (pci->pcop, NULL, 0));
11538 if (oldval && oldval->in_val == litnum) {
11539 //fprintf (stderr, "%s: W already set up correctly (%x)\n", PCI(pc)->mnemonic, oldval->in_val);
11540 pic16_safepCodeRemove (pc, "=DF= redundant MOVLW removed");
11542 defmapUpdate (list, SPO_WREG, pc, litnum);
11545 case POC_ANDLW: /* modifies STATUS (Z,N) */
11546 case POC_IORLW: /* modifies STATUS (Z,N) */
11547 case POC_XORLW: /* modifies STATUS (Z,N) */
11548 /* can be optimized iff WREG contains a known literal (0x100 - 0x1FF) */
11549 if (pci->pcop->type == PO_LITERAL) {
11551 lit = (unsigned char) PCOL(pci->pcop)->lit;
11552 val = defmapCurr (list, SPO_WREG, pc);
11553 if (val) vallit = litFromValnum (val->in_val);
11554 if (vallit != -1) {
11555 /* xxxLW <literal>, WREG contains a known literal */
11556 fprintf (stderr, "%s 0x%02x, WREG: 0x%x\n", pci->mnemonic, lit, vallit);
11557 if (pci->op == POC_ANDLW) {
11559 } else if (pci->op == POC_IORLW) {
11561 } else if (pci->op == POC_XORLW) {
11564 assert (0 && "invalid operation");
11566 if (vallit == lit) {
11567 //fprintf (stderr, "%s: W already set up correctly (%x = val %x)\n", pci->mnemonic, vallit, val->in_val);
11568 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant ANDLW/IORLW/XORLW removed");
11570 defmapUpdate (list, SPO_WREG, pc, valnumFromLit (lit));
11577 /* check if old value matches new value */
11580 assert (pci->pcop->type == PO_LITERAL);
11582 lit = PCOL(pci->pcop)->lit;
11584 val = defmapCurr (list, pic16_fsrsym_idx[lit][0], pc);
11586 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11587 fprintf (stderr, "FSR%dL already set up correctly at %p (%x)\n", lit, pc, val->val);
11589 /* cannot remove this LFSR */
11593 val = defmapCurr (list, pic16_fsrsym_idx[lit][1], pc);
11594 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11595 fprintf (stderr, "FSR%dH already set up correctly at %p (%x)\n", lit, pc, val->val);
11601 pic16_safepCodeRemove (pc, "=DF= redundant LFSR removed");
11606 case POC_MOVWF: /* does not touch flags */
11607 /* find value of WREG */
11608 val = defmapCurr (list, SPO_WREG, pc);
11609 oldval = defmapCurr (list, sym1, pc);
11610 if (val) lit = litFromValnum (val->in_val);
11612 //fprintf (stderr, "MOVWF: lit: %i (%x, %x)\n", lit, lit, val->in_val);
11614 if ((lit == 0 || lit == 0x0ff) && !pic16_isAlive (SPO_STATUS, pc)) {
11615 /* might replace with CLRF/SETF (will possibly make previous MOVLW 0x00/0xff unneccessary --> dead code elimination) */
11616 //fprintf (stderr, "replacing MOVWF with CLRF/SETF\n");
11618 newpc = pic16_newpCode (POC_CLRF, pic16_pCodeOpCopy (pci->pcop));
11620 assert (lit == 0x0ff);
11621 newpc = pic16_newpCode (POC_SETF, pic16_pCodeOpCopy (pci->pcop));
11623 if (pic16_debug_verbose || pic16_pcode_verbose) pic16_InsertCommentAfter (pc->prev, "=DF= MOVWF: replaced by CLRF/SETF");
11624 pic16_pCodeReplace (pc, newpc);
11625 defmapReplaceSymRef (pc, SPO_WREG, 0, 1);
11626 pic16_fixDefmap (pc, newpc);
11629 /* This breaks the defmap chain's references to pCodes... fix it! */
11630 if (!val->prev) PCI(pc)->pcflow->defmap = val->next;
11631 if (!val->acc.access.isWrite) {
11632 deleteDefmap (val); // delete reference to WREG as in value
11635 val->acc.access.isRead = 0; // delete reference to WREG as in value
11637 oldval = PCI(pc)->pcflow->defmap;
11639 if (oldval->pc == pc) oldval->pc = newpc;
11640 oldval = oldval->next;
11642 } else if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11643 //fprintf (stderr, "MOVWF: F (%s) already set up correctly (%x) at %p\n", strFromSym (sym1), oldval->in_val, pc);
11644 pic16_safepCodeRemove (pc, "=DF= redundant MOVWF removed");
11646 if (val) defmapUpdate (list, sym1, pc, val->in_val);
11649 case POC_MOVFW: /* modifies STATUS (Z,N) */
11650 /* find value of REG */
11651 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11652 val = defmapCurr (list, sym1, pc);
11653 oldval = defmapCurr (list, SPO_WREG, pc);
11654 if (val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11655 //fprintf (stderr, "MOVFW: W already set up correctly (%x) at %p\n", oldval->in_val, pc);
11656 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant MOVFW removed");
11658 if (val) defmapUpdate (list, SPO_WREG, pc, val->in_val);
11662 case POC_MOVFF: /* does not touch STATUS */
11663 /* find value of REG */
11664 val = defmapCurr (list, sym1, pc);
11665 oldval = defmapCurr (list, sym2, pc);
11666 if (val) lit = litFromValnum (val->in_val);
11669 if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && !pic16_isAlive (SPO_STATUS, pc)) {
11670 //pc->print (stderr, pc); fprintf (stderr, "lit: %d (%x, %x)\n", lit, lit, val->in_val);
11672 newpc = pic16_newpCode (POC_CLRF, PCOR2(pci->pcop)->pcop2);
11673 } else if (lit == 0x00ff) {
11674 newpc = pic16_newpCode (POC_SETF, PCOR2(pci->pcop)->pcop2);
11679 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: replaced by CRLF/SETF");
11680 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11681 pic16_pCodeReplace (pc, newpc);
11682 defmapReplaceSymRef (pc, sym1, 0, 1);
11683 pic16_fixDefmap (pc, newpc);
11685 break; // do not process instruction as MOVFF...
11687 } else if (!isSpecial1 && !isSpecial2 && pic16_regIsLocal (reg1) && pic16_regIsLocal (reg2)) {
11688 if (val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11689 //fprintf (stderr, "MOVFF: F2 (%s) already set up correctly (%x) at %p\n", strFromSym (sym2), oldval->in_val, pc);
11690 pic16_safepCodeRemove (pc, "=DF= redundant MOVFF removed");
11692 if (!pic16_isAlive (sym1, pc)) {
11693 defmap_t *copy = NULL;
11694 /* If there is another symbol S storing sym1's value we should assign from S thus shortening the liferange of sym1.
11695 * This should help eliminate
11697 * <do something not changing A or using B>
11699 * <B is not alive anymore>
11701 * <do something not changing A or using B>
11705 /* scan defmap for symbols storing sym1's value */
11706 while (oldval && (oldval->pc == pc || oldval->in_val != val->in_val)) oldval = oldval->next;
11707 if (oldval && (oldval->sym != sym1) && defmapFindAll (oldval->sym, pc, ©) == 1) {
11708 /* unique reaching definition for sym found */
11709 if (copy->val && copy->val == val->in_val) {
11710 //fprintf (stderr, "found replacement symbol for %s (val %x) <-- %s (assigned %x @ %p)\n", strFromSym(sym1), val->in_val, strFromSym(copy->sym), copy->val, copy->pc);
11711 if (copy->sym == SPO_WREG) {
11712 newpc = pic16_newpCode (POC_MOVWF, pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2));
11714 newpc = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
11715 // /*TODO: change to copy->pc's out symbol*/pic16_pCodeOpCopy (pci->pcop),
11716 pic16_pCodeOpCopy (PCI(copy->pc)->pcop),
11717 pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2)));
11719 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: SRC op %s replaced by %s", strFromSym(sym1), strFromSym(copy->sym));
11720 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11721 pic16_pCodeReplace (pc, newpc);
11722 assert (val->sym == sym1 && val->acc.access.isRead && !val->acc.access.isWrite);
11723 defmapReplaceSymRef (pc, sym1, copy->sym, 1);
11724 pic16_fixDefmap (pc, newpc);
11728 deleteDefmapChain (©);
11731 if (val) defmapUpdate (list, sym2, pc, val->in_val);
11736 /* cannot optimize */
11741 static void pic16_destructDF (pBlock *pb) {
11744 /* remove old defmaps */
11745 pc = pic16_findNextInstruction (pb->pcHead);
11747 next = pic16_findNextInstruction (pc->next);
11749 assert (isPCI(pc) || isPCAD(pc));
11750 assert (PCI(pc)->pcflow);
11751 deleteDefmapChain (&PCI(pc)->pcflow->defmap);
11752 deleteDefmapChain (&PCI(pc)->pcflow->in_vals);
11753 deleteDefmapChain (&PCI(pc)->pcflow->out_vals);
11758 if (defmap_free || defmap_free_count) {
11759 //fprintf (stderr, "released defmaps: %u -- freeing up memory\n", defmap_free_count);
11760 freeDefmap (&defmap_free);
11761 defmap_free_count = 0;
11765 /* Checks whether a pBlock contains ASMDIRs. */
11766 static int pic16_pBlockHasAsmdirs (pBlock *pb) {
11769 pc = pic16_findNextInstruction (pb->pcHead);
11771 if (isPCAD(pc)) return 1;
11773 pc = pic16_findNextInstruction (pc->next);
11776 /* no PCADs found */
11781 /* Remove MOVFF r0x??, POSTDEC1 and MOVFF PREINC1, r0x?? for otherwise unused registers. */
11782 static int pic16_removeUnusedRegistersDF () {
11785 regs *reg1, *reg2, *reg3;
11786 set *seenRegs = NULL;
11788 int islocal, change = 0;
11791 if (!the_pFile || !the_pFile->pbHead) return 0;
11793 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
11794 //fprintf (stderr, "%s: examining function %s\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11796 /* find set of using pCodes per register */
11797 for (pc = pic16_findNextInstruction (pb->pcHead); pc;
11798 pc = pic16_findNextInstruction(pc->next)) {
11800 cond = PCI(pc)->inCond | PCI(pc)->outCond;
11801 reg1 = reg2 = NULL;
11802 if (cond & PCC_REGISTER) reg1 = pic16_getRegFromInstruction (pc);
11803 if (cond & PCC_REGISTER2) reg2 = pic16_getRegFromInstruction2 (pc);
11806 if (!isinSet (seenRegs, reg1)) reg1->reglives.usedpCodes = NULL;
11807 addSetIfnotP (&seenRegs, reg1);
11808 addSetIfnotP (®1->reglives.usedpCodes, pc);
11811 if (!isinSet (seenRegs, reg2)) reg2->reglives.usedpCodes = NULL;
11812 addSetIfnotP (&seenRegs, reg2);
11813 addSetIfnotP (®2->reglives.usedpCodes, pc);
11817 for (reg1 = setFirstItem (seenRegs); reg1; reg1 = setNextItem (seenRegs)) {
11818 /* may not use pic16_regIsLocal() here -- in interrupt routines
11819 * WREG, PRODx, FSR0x must be saved */
11820 islocal = (reg1->isLocal || reg1->rIdx == pic16_framepnt_lo->rIdx || reg1->rIdx == pic16_framepnt_hi->rIdx);
11821 if (islocal && elementsInSet (reg1->reglives.usedpCodes) == 2) {
11823 for (i=0; i < 2; i++) {
11824 pc = (pCode *) indexSet(reg1->reglives.usedpCodes, i);
11825 if (!pc2) pc2 = pc;
11826 if (!isPCI(pc) || !PCI(pc)->op == POC_MOVFF) continue;
11827 reg2 = pic16_getRegFromInstruction (pc);
11828 reg3 = pic16_getRegFromInstruction2 (pc);
11830 || (reg2->rIdx != pic16_stack_preinc->rIdx
11831 && reg3->rIdx != pic16_stack_postdec->rIdx)) break;
11833 /* both pCodes are MOVFF R,POSTDEC1 / MOVFF PREINC1,R */
11834 //fprintf (stderr, "%s: removing local register %s from %s\n", __FUNCTION__, reg1->name, pic16_pBlockGetFunctionName (pb));
11835 pic16_safepCodeRemove (pc, "removed unused local reg IN");
11836 pic16_safepCodeRemove (pc2, "removed unused local reg OUT");
11840 deleteSet (®1->reglives.usedpCodes);
11843 deleteSet (&seenRegs);
11850 /* Set up pCodeFlow's defmap_ts.
11851 * Needs correctly set up to/from fields. */
11852 static void pic16_createDF (pBlock *pb) {
11856 //fprintf (stderr, "creating DF for pb %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
11858 pic16_destructDF (pb);
11860 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
11861 if (pic16_pBlockHasAsmdirs (pb)) {
11862 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
11866 /* integrity check -- we need to reach all flows to guarantee
11867 * correct data flow analysis (reaching definitions, aliveness) */
11869 if (!verifyAllFlowsReachable (pb)) {
11870 fprintf (stderr, "not all flows reachable -- aborting dataflow analysis for %s!\n", pic16_pBlockGetFunctionName (pb));
11875 /* establish new defmaps */
11876 pc = pic16_findNextInstruction (pb->pcHead);
11878 next = pic16_findNextInstruction (pc->next);
11880 assert (PCI(pc)->pcflow);
11881 PCI(pc)->pcflow->defmap = createDefmap (pc, PCI(pc)->pcflow->defmap);
11886 //fprintf (stderr, "%s: creating reaching definitions...\n", __FUNCTION__);
11887 createReachingDefinitions (pb);
11890 /* assign better valnums */
11891 //fprintf (stderr, "assigning valnums for pb %p\n", pb);
11892 pc = pic16_findNextInstruction (pb->pcHead);
11894 next = pic16_findNextInstruction (pc->next);
11896 assert (PCI(pc)->pcflow);
11897 assignValnums (pc);
11904 /* remove dead pCodes */
11905 //fprintf (stderr, "removing dead pCodes in %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
11908 pc = pic16_findNextInstruction (pb->pcHead);
11910 next = pic16_findNextInstruction (pc->next);
11912 if (isPCI(pc) && !isPCI_BRANCH(pc) && !pic16_pCodeIsAlive (pc)) {
11913 change += pic16_safepCodeRemove (pc, "=DF= removed dead pCode");
11923 /* ======================================================================= */
11924 /* === DEPRECATED CONTROL FLOW CREATION ROUTINES ========================= */
11925 /* ======================================================================= */
11929 /* connect pCode f anf t via their to/from pBranches */
11930 static void pic16_pCodeLink (pCode *f, pCode *t) {
11932 pCodeInstruction *_f, *_t;
11934 if (!f || !t) return;
11937 fprintf (stderr, "linking:\n");
11938 f->print(stderr, f);
11939 f->print(stderr, t);
11942 assert (isPCI(f) || isPCAD(f));
11943 assert (isPCI(t) || isPCAD(t));
11947 /* define t to be CF successor of f */
11948 br = Safe_malloc (sizeof (pBranch));
11951 _f->to = pic16_pBranchAppend (_f->to, br);
11953 /* define f to be CF predecessor of t */
11954 br = Safe_malloc (sizeof (pBranch));
11957 _t->from = pic16_pBranchAppend (_t->from, br);
11959 /* also update pcflow information */
11960 if (_f->pcflow && _t->pcflow && _f->pcflow != _t->pcflow) {
11961 //fprintf (stderr, "creating flow %p --> %p\n", _f->pcflow, _t->pcflow);
11962 LinkFlow_pCode (_f, _t);
11966 static void pic16_destructCF (pBlock *pb) {
11970 /* remove old CF information */
11974 while (PCI(pc)->to) {
11975 br = PCI(pc)->to->next;
11976 Safe_free (PCI(pc)->to);
11979 while (PCI(pc)->from) {
11980 br = PCI(pc)->from->next;
11981 Safe_free (PCI(pc)->from);
11982 PCI(pc)->from = br;
11984 } else if (isPCFL(pc)) {
11985 deleteSet (&PCFL(pc)->to);
11986 deleteSet (&PCFL(pc)->from);
11994 /* Set up pCodeInstruction's to and from pBranches. */
11995 static void pic16_createCF (pBlock *pb) {
11997 pCode *next, *dest;
12000 //fprintf (stderr, "creating CF for %p\n", pb);
12002 pic16_destructCF (pb);
12004 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
12005 if (pic16_pBlockHasAsmdirs (pb)) {
12006 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
12010 pc = pic16_findNextInstruction(pb->pcHead);
12012 next = pic16_findNextInstruction(pc->next);
12013 if (isPCI_SKIP(pc)) {
12014 pic16_pCodeLink(pc, next);
12015 pic16_pCodeLink(pc, pic16_findNextInstruction(next->next));
12016 } else if (isPCI_BRANCH(pc)) {
12017 // Bcc, BRA, CALL, GOTO
12018 if (PCI(pc)->pcop) {
12019 switch (PCI(pc)->pcop->type) {
12021 label = PCOLAB(PCI(pc)->pcop)->pcop.name;
12022 dest = findLabelinpBlock (pc->pb, PCOLAB(PCI(pc)->pcop));
12026 /* needed for GOTO ___irq_handler */
12027 label = PCI(pc)->pcop->name;
12032 assert (0 && "invalid label format");
12040 switch (PCI(pc)->op) {
12043 if (dest != NULL) {
12044 pic16_pCodeLink(pc, dest);
12046 //fprintf (stderr, "jump target \"%s\" not found!\n", label);
12052 pic16_pCodeLink(pc, next);
12062 if (dest != NULL) {
12063 pic16_pCodeLink(pc, dest);
12065 //fprintf (stderr, "jump target \"%s\"not found!\n", label);
12067 pic16_pCodeLink(pc, next);
12070 fprintf (stderr, "BRANCH instruction: %s\n", PCI(pc)->mnemonic);
12071 assert (0 && "unhandled branch instruction");
12075 pic16_pCodeLink (pc, next);
12082 /* ======================================================================== */
12083 /* === VCG DUMPER ROUTINES ================================================ */
12084 /* ======================================================================== */
12085 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
12086 hTab *dumpedNodes = NULL;
12088 /** Dump VCG header into of. */
12089 static void pic16_vcg_init (FILE *of) {
12090 /* graph defaults */
12091 fprintf (of, "graph:{\n");
12092 fprintf (of, "title:\"graph1\"\n");
12093 fprintf (of, "label:\"graph1\"\n");
12094 fprintf (of, "color:white\n");
12095 fprintf (of, "textcolor:black\n");
12096 fprintf (of, "bordercolor:black\n");
12097 fprintf (of, "borderwidth:1\n");
12098 fprintf (of, "textmode:center\n");
12100 fprintf (of, "layoutalgorithm:dfs\n");
12101 fprintf (of, "late_edge_labels:yes\n");
12102 fprintf (of, "display_edge_labels:yes\n");
12103 fprintf (of, "dirty_edge_labels:yes\n");
12104 fprintf (of, "finetuning:yes\n");
12105 fprintf (of, "ignoresingles:no\n");
12106 fprintf (of, "straight_phase:yes\n");
12107 fprintf (of, "priority_phase:yes\n");
12108 fprintf (of, "manhattan_edges:yes\n");
12109 fprintf (of, "smanhattan_edges:no\n");
12110 fprintf (of, "nearedges:no\n");
12111 fprintf (of, "node_alignment:center\n"); // bottom|top|center
12112 fprintf (of, "port_sharing:no\n");
12113 fprintf (of, "arrowmode:free\n"); // fixed|free
12114 fprintf (of, "crossingphase2:yes\n");
12115 fprintf (of, "crossingoptimization:yes\n");
12116 fprintf (of, "edges:yes\n");
12117 fprintf (of, "nodes:yes\n");
12118 fprintf (of, "splines:no\n");
12120 /* node defaults */
12121 fprintf (of, "node.color:lightyellow\n");
12122 fprintf (of, "node.textcolor:black\n");
12123 fprintf (of, "node.textmode:center\n");
12124 fprintf (of, "node.shape:box\n");
12125 fprintf (of, "node.bordercolor:black\n");
12126 fprintf (of, "node.borderwidth:1\n");
12128 /* edge defaults */
12129 fprintf (of, "edge.textcolor:black\n");
12130 fprintf (of, "edge.color:black\n");
12131 fprintf (of, "edge.thickness:1\n");
12132 fprintf (of, "edge.arrowcolor:black\n");
12133 fprintf (of, "edge.backarrowcolor:black\n");
12134 fprintf (of, "edge.arrowsize:15\n");
12135 fprintf (of, "edge.backarrowsize:15\n");
12136 fprintf (of, "edge.arrowstyle:line\n"); // none|solid|line
12137 fprintf (of, "edge.backarrowstyle:none\n"); // none|solid|line
12138 fprintf (of, "edge.linestyle:continuous\n"); // continuous|solid|dotted|dashed|invisible
12140 fprintf (of, "\n");
12142 /* prepare data structures */
12144 hTabDeleteAll (dumpedNodes);
12145 dumpedNodes = NULL;
12147 dumpedNodes = newHashTable (128);
12150 /** Dump VCG footer into of. */
12151 static void pic16_vcg_close (FILE *of) {
12152 fprintf (of, "}\n");
12155 #define BUF_SIZE 128
12156 #define pcTitle(pc) (SNPRINTF (buf, BUF_SIZE, "n_%p, %p/%u", PCODE(pc), isPCI(pc) ? PCI(pc)->pcflow : NULL, PCODE(pc)->seq), &buf[0])
12159 static int ptrcmp (const void *p1, const void *p2) {
12164 /** Dump a pCode node as VCG to of. */
12165 static void pic16_vcg_dumpnode (pCode *pc, FILE *of) {
12166 char buf[BUF_SIZE];
12168 if (hTabFindByKey (dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, ptrcmp)) {
12172 hTabAddItemLong (&dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, pc);
12173 //fprintf (stderr, "dumping %p\n", pc);
12175 /* only dump pCodeInstructions and Flow nodes */
12176 if (!isPCI(pc) && !isPCAD(pc) && !isPCFL(pc)) return;
12179 fprintf (of, "node:{");
12180 fprintf (of, "title:\"%s\" ", pcTitle(pc));
12181 fprintf (of, "label:\"%s\n", pcTitle(pc));
12183 fprintf (of, "<PCFLOW>");
12184 } else if (isPCI(pc) || isPCAD(pc)) {
12185 pc->print (of, pc);
12187 fprintf (of, "<!PCI>");
12189 fprintf (of, "\" ");
12190 fprintf (of, "}\n");
12192 if (1 && isPCFL(pc)) {
12193 defmap_t *map, *prev;
12195 map = PCFL(pc)->defmap;
12198 if (map->sym != 0) {
12201 /* emit definition node */
12202 fprintf (of, "node:{title:\"%s_def%u\" ", pcTitle(pc), i);
12203 fprintf (of, "label:\"");
12207 fprintf (of, "%s%c%c: val %4x|%4x & %02x|%02x, sym %s", (prev == map) ? "" : "\n", map->acc.access.isRead ? 'R' : ' ', map->acc.access.isWrite ? 'W' : ' ', map->in_val, map->val, map->acc.access.in_mask, map->acc.access.mask, strFromSym (map->sym));
12210 } while (map && prev->pc == map->pc);
12213 fprintf (of, "\" ");
12215 fprintf (of, "color:green ");
12216 fprintf (of, "}\n");
12218 /* emit edge to previous definition */
12219 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12221 fprintf (of, "targetname:\"%s\" ", pcTitle(pc));
12223 fprintf (of, "targetname:\"%s_def%u\" ", pcTitle(pc), i-1);
12225 fprintf (of, "color:green ");
12226 fprintf (of, "}\n");
12229 pic16_vcg_dumpnode (map->pc, of);
12230 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12231 fprintf (of, "targetname:\"%s\" linestyle:dashed color:lightgreen}\n", pcTitle(map->pc));
12238 /* emit additional nodes (e.g. operands) */
12241 /** Dump a pCode's edges (control flow/data flow) as VCG to of. */
12242 static void pic16_vcg_dumpedges (pCode *pc, FILE *of) {
12243 char buf[BUF_SIZE];
12244 pCodeInstruction *pci;
12248 if (1 && isPCFL(pc)) {
12249 /* emit edges to flow successors */
12251 //fprintf (stderr, "PCFLOWe @ %p\n", pc);
12252 pcfl = setFirstItem (PCFL(pc)->to);
12254 pcfl = ((pCodeFlowLink *) (pcfl))->pcflow;
12255 pic16_vcg_dumpnode (pc, of);
12256 pic16_vcg_dumpnode ((pCode *) pcfl, of);
12257 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12258 fprintf (of, "targetname:\"%s\" color:lightred linestyle:dashed}\n", pcTitle(pcfl));
12259 pcfl = setNextItem (PCFL(pc)->to);
12263 if (!isPCI(pc) && !isPCAD(pc)) return;
12267 /* emit control flow edges (forward only) */
12271 pic16_vcg_dumpnode (curr->pc, of);
12272 fprintf (of, "edge:{");
12273 fprintf (of, "sourcename:\"%s\" ", pcTitle(pc));
12274 fprintf (of, "targetname:\"%s\" ", pcTitle(curr->pc));
12275 fprintf (of, "color:red ");
12276 fprintf (of, "}\n");
12281 /* dump "flow" edge (link pCode according to pBlock order) */
12284 pcnext = pic16_findNextInstruction (pc->next);
12286 pic16_vcg_dumpnode (pcnext, of);
12287 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12288 fprintf (of, "targetname:\"%s\" color:red linestyle:solid}\n", pcTitle(pcnext));
12296 pic16_vcg_dumpnode (&pci->pcflow->pc, of);
12297 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12298 fprintf (of, "targetname:\"%s\" color:lightblue linestyle:dashed}\n", pcTitle (pci->pcflow));
12302 /* emit data flow edges (backward only) */
12303 /* TODO: gather data flow information... */
12306 static void pic16_vcg_dump (FILE *of, pBlock *pb) {
12309 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
12310 if (pic16_pBlockHasAsmdirs (pb)) {
12311 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
12315 for (pc=pb->pcHead; pc; pc = pc->next) {
12316 pic16_vcg_dumpnode (pc, of);
12319 for (pc=pb->pcHead; pc; pc = pc->next) {
12320 pic16_vcg_dumpedges (pc, of);
12324 static void pic16_vcg_dump_default (pBlock *pb) {
12326 char buf[BUF_SIZE];
12329 /* get function name */
12331 while (pc && !isPCF(pc)) pc = pc->next;
12333 SNPRINTF (buf, BUF_SIZE, "%s_%s.vcg", PCF(pc)->modname, PCF(pc)->fname);
12335 SNPRINTF (buf, BUF_SIZE, "pb_%p.vcg", pb);
12338 //fprintf (stderr, "now dumping %s\n", buf);
12339 of = fopen (buf, "w");
12340 pic16_vcg_init (of);
12341 pic16_vcg_dump (of, pb);
12342 pic16_vcg_close (of);
12347 /*** END of helpers for pCode dataflow optimizations ***/
projects / fw / sdcc / blob