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(r && !r->accessBank)SAFE_snprintf(&s,&size,", %s", (!pic16_mplab_comp?"B":"BANKED"));
5048 /* assuming that comment ends with a \n */
5049 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
5053 SAFE_snprintf(&s,&size,"; info ==>");
5054 switch( PCINF(pc)->type ) {
5055 case INF_OPTIMIZATION:
5056 SAFE_snprintf(&s,&size, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5059 SAFE_snprintf(&s,&size, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5064 /* assuming that inline code ends with a \n */
5065 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
5069 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
5072 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
5075 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
5078 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
5081 // SAFE_snprintf(&s,&size,";#CSRC\t%s %d\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5082 SAFE_snprintf(&s,&size,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5083 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5086 if(PCAD(pc)->directive) {
5087 SAFE_snprintf(&s,&size,"\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5090 /* special case to handle inline labels without a tab */
5091 SAFE_snprintf(&s,&size,"%s\n", PCAD(pc)->arg);
5096 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
5104 /*-----------------------------------------------------------------*/
5105 /* genericPrint - the contents of a pCode to a file */
5106 /*-----------------------------------------------------------------*/
5107 static void genericPrint(FILE *of, pCode *pc)
5115 // fputs(((pCodeComment *)pc)->comment, of);
5116 fprintf(of,"; %s\n", ((pCodeComment *)pc)->comment);
5121 pBranch *pbl = PCI(pc)->label;
5122 while(pbl && pbl->pc) {
5123 if(pbl->pc->type == PC_LABEL)
5124 pCodePrintLabel(of, pbl->pc);
5129 if(pic16_pcode_verbose) {
5130 fprintf(of, "; info ==>");
5131 switch(((pCodeInfo *)pc)->type) {
5132 case INF_OPTIMIZATION:
5133 fprintf(of, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5136 fprintf(of, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5144 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
5148 // If the opcode has a label, print that first
5150 pBranch *pbl = PCI(pc)->label;
5151 while(pbl && pbl->pc) {
5152 if(pbl->pc->type == PC_LABEL)
5153 pCodePrintLabel(of, pbl->pc);
5159 genericPrint(of,PCODE(PCI(pc)->cline));
5164 pic16_pCode2str(str, 256, pc);
5166 fprintf(of,"%s",str);
5168 if(pic16_debug_verbose) {
5169 fprintf(of, "\t;key=%03x",pc->seq);
5171 fprintf(of,", flow seq=%03x",PCI(pc)->pcflow->pc.seq);
5178 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
5179 if(PCW(pc)->pci.label)
5180 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
5182 if(PCW(pc)->operand) {
5183 fprintf(of,";\toperand ");
5184 pCodeOpPrint(of,PCW(pc)->operand );
5189 if(pic16_debug_verbose) {
5190 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
5191 if(PCFL(pc)->ancestor)
5192 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
5199 // fprintf(of,";#CSRC\t%s %d\t\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5200 fprintf(of,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5201 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5207 pBranch *pbl = PCAD(pc)->pci.label;
5208 while(pbl && pbl->pc) {
5209 if(pbl->pc->type == PC_LABEL)
5210 pCodePrintLabel(of, pbl->pc);
5214 if(PCAD(pc)->directive) {
5215 fprintf(of, "\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5218 /* special case to handle inline labels without tab */
5219 fprintf(of, "%s\n", PCAD(pc)->arg);
5225 fprintf(of,"unknown pCode type %d\n",pc->type);
5230 /*-----------------------------------------------------------------*/
5231 /* pCodePrintFunction - prints function begin/end */
5232 /*-----------------------------------------------------------------*/
5234 static void pCodePrintFunction(FILE *of, pCode *pc)
5241 if( ((pCodeFunction *)pc)->modname)
5242 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
5245 if(!PCF(pc)->absblock) {
5246 if(PCF(pc)->fname) {
5247 pBranch *exits = PCF(pc)->to;
5250 fprintf(of,"%s:", PCF(pc)->fname);
5252 if(pic16_pcode_verbose)
5253 fprintf(of, "\t;Function start");
5259 exits = exits->next;
5263 if(pic16_pcode_verbose)
5264 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
5267 if((PCF(pc)->from &&
5268 PCF(pc)->from->pc->type == PC_FUNCTION &&
5269 PCF(PCF(pc)->from->pc)->fname) ) {
5271 if(pic16_pcode_verbose)
5272 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
5274 if(pic16_pcode_verbose)
5275 fprintf(of,"; exit point [can't find entry point]\n");
5281 /*-----------------------------------------------------------------*/
5282 /* pCodePrintLabel - prints label */
5283 /*-----------------------------------------------------------------*/
5285 static void pCodePrintLabel(FILE *of, pCode *pc)
5292 fprintf(of,"%s:\n",PCL(pc)->label);
5293 else if (PCL(pc)->key >=0)
5294 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
5296 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
5299 /*-----------------------------------------------------------------*/
5300 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
5301 /* remove it if it is found. */
5302 /*-----------------------------------------------------------------*/
5303 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
5310 if(pcl->type == PC_OPCODE || pcl->type == PC_INLINE || pcl->type == PC_ASMDIR)
5311 b = PCI(pcl)->label;
5313 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
5318 //fprintf (stderr, "%s \n",__FUNCTION__);
5319 //pcl->print(stderr,pcl);
5320 //pc->print(stderr,pc);
5323 //fprintf (stderr, "found label\n");
5324 //pc->print(stderr, pc);
5328 bprev->next = b->next; /* Not first pCode in chain */
5332 PCI(pcl)->label = b->next; /* First pCode in chain */
5335 return; /* A label can't occur more than once */
5343 /*-----------------------------------------------------------------*/
5344 /*-----------------------------------------------------------------*/
5345 pBranch * pic16_pBranchAppend(pBranch *h, pBranch *n)
5364 /*-----------------------------------------------------------------*/
5365 /* pBranchLink - given two pcodes, this function will link them */
5366 /* together through their pBranches */
5367 /*-----------------------------------------------------------------*/
5368 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
5372 // Declare a new branch object for the 'from' pCode.
5374 //_ALLOC(b,sizeof(pBranch));
5375 b = Safe_calloc(1,sizeof(pBranch));
5376 b->pc = PCODE(t); // The link to the 'to' pCode.
5379 f->to = pic16_pBranchAppend(f->to,b);
5381 // Now do the same for the 'to' pCode.
5383 //_ALLOC(b,sizeof(pBranch));
5384 b = Safe_calloc(1,sizeof(pBranch));
5388 t->from = pic16_pBranchAppend(t->from,b);
5393 /*-----------------------------------------------------------------*/
5394 /* pBranchFind - find the pBranch in a pBranch chain that contains */
5396 /*-----------------------------------------------------------------*/
5397 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
5410 /*-----------------------------------------------------------------*/
5411 /* pic16_pCodeUnlink - Unlink the given pCode from its pCode chain. */
5412 /*-----------------------------------------------------------------*/
5413 void pic16_pCodeUnlink(pCode *pc)
5418 if(!pc->prev || !pc->next) {
5419 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
5423 /* move C source line down (or up) */
5424 if (isPCI(pc) && PCI(pc)->cline) {
5425 pc1 = pic16_findNextInstruction (pc->next);
5426 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline) {
5427 PCI(pc1)->cline = PCI(pc)->cline;
5429 pc1 = pic16_findPrevInstruction (pc->prev);
5430 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline)
5431 PCI(pc1)->cline = PCI(pc)->cline;
5435 /* first remove the pCode from the chain */
5436 pc->prev->next = pc->next;
5437 pc->next->prev = pc->prev;
5439 pc->prev = pc->next = NULL;
5441 /* Now for the hard part... */
5443 /* Remove the branches */
5445 pb1 = PCI(pc)->from;
5447 pc1 = pb1->pc; /* Get the pCode that branches to the
5448 * one we're unlinking */
5450 /* search for the link back to this pCode (the one we're
5452 if((pb2 = pBranchFind(PCI(pc1)->to,pc))) {
5453 pb2->pc = PCI(pc)->to->pc; // make the replacement
5455 /* if the pCode we're unlinking contains multiple 'to'
5456 * branches (e.g. this a skip instruction) then we need
5457 * to copy these extra branches to the chain. */
5458 if(PCI(pc)->to->next)
5459 pic16_pBranchAppend(pb2, PCI(pc)->to->next);
5468 /*-----------------------------------------------------------------*/
5469 /*-----------------------------------------------------------------*/
5471 static void genericAnalyze(pCode *pc)
5481 // Go through the pCodes that are in pCode chain and link
5482 // them together through the pBranches. Note, the pCodes
5483 // are linked together as a contiguous stream like the
5484 // assembly source code lines. The linking here mimics this
5485 // except that comments are not linked in.
5487 pCode *npc = pc->next;
5489 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
5490 pBranchLink(pc,npc);
5495 /* reached the end of the pcode chain without finding
5496 * an instruction we could link to. */
5500 fprintf(stderr,"analyze PC_FLOW\n");
5504 fprintf(stderr,,";A bad pCode is being used\n");
5510 /*-----------------------------------------------------------------*/
5511 /*-----------------------------------------------------------------*/
5512 static int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
5516 if(pc->type == PC_LABEL) {
5517 if( ((pCodeLabel *)pc)->key == pcop_label->key)
5520 if((pc->type == PC_OPCODE)
5521 || (pc->type == PC_ASMDIR)
5523 pbr = PCI(pc)->label;
5525 if(pbr->pc->type == PC_LABEL) {
5526 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
5536 /*-----------------------------------------------------------------*/
5537 /*-----------------------------------------------------------------*/
5538 static int checkLabel(pCode *pc)
5542 if(pc && isPCI(pc)) {
5543 pbr = PCI(pc)->label;
5545 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
5555 /*-----------------------------------------------------------------*/
5556 /* findLabelinpBlock - Search the pCode for a particular label */
5557 /*-----------------------------------------------------------------*/
5558 static pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
5565 for(pc = pb->pcHead; pc; pc = pc->next)
5566 if(compareLabel(pc,pcop_label))
5572 /*-----------------------------------------------------------------*/
5573 /* findLabel - Search the pCode for a particular label */
5574 /*-----------------------------------------------------------------*/
5575 static pCode * findLabel(pCodeOpLabel *pcop_label)
5583 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5584 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
5588 fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
5592 /*-----------------------------------------------------------------*/
5593 /* pic16_findNextpCode - given a pCode, find the next of type 'pct' */
5594 /* in the linked list */
5595 /*-----------------------------------------------------------------*/
5596 pCode * pic16_findNextpCode(pCode *pc, PC_TYPE pct)
5609 /*-----------------------------------------------------------------*/
5610 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
5611 /* in the linked list */
5612 /*-----------------------------------------------------------------*/
5613 static pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
5627 //#define PCODE_DEBUG
5628 /*-----------------------------------------------------------------*/
5629 /* pic16_findNextInstruction - given a pCode, find the next instruction */
5630 /* in the linked list */
5631 /*-----------------------------------------------------------------*/
5632 pCode * pic16_findNextInstruction(pCode *pci)
5637 if((pc->type == PC_OPCODE)
5638 || (pc->type == PC_WILD)
5639 || (pc->type == PC_ASMDIR)
5644 fprintf(stderr,"pic16_findNextInstruction: ");
5645 printpCode(stderr, pc);
5650 //fprintf(stderr,"Couldn't find instruction\n");
5654 /*-----------------------------------------------------------------*/
5655 /* pic16_findPrevInstruction - given a pCode, find the next instruction */
5656 /* in the linked list */
5657 /*-----------------------------------------------------------------*/
5658 pCode * pic16_findPrevInstruction(pCode *pci)
5664 if((pc->type == PC_OPCODE)
5665 || (pc->type == PC_WILD)
5666 || (pc->type == PC_ASMDIR)
5672 fprintf(stderr,"pic16_findPrevInstruction: ");
5673 printpCode(stderr, pc);
5678 //fprintf(stderr,"Couldn't find instruction\n");
5685 /*-----------------------------------------------------------------*/
5686 /* findFunctionEnd - given a pCode find the end of the function */
5687 /* that contains it */
5688 /*-----------------------------------------------------------------*/
5689 static pCode * findFunctionEnd(pCode *pc)
5693 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
5699 fprintf(stderr,"Couldn't find function end\n");
5704 /*-----------------------------------------------------------------*/
5705 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
5706 /* instruction with which it is associated. */
5707 /*-----------------------------------------------------------------*/
5708 static void AnalyzeLabel(pCode *pc)
5711 pic16_pCodeUnlink(pc);
5717 static void AnalyzeGOTO(pCode *pc)
5720 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
5724 static void AnalyzeSKIP(pCode *pc)
5727 pBranchLink(pc,pic16_findNextInstruction(pc->next));
5728 pBranchLink(pc,pic16_findNextInstruction(pc->next->next));
5732 static void AnalyzeRETURN(pCode *pc)
5735 // branch_link(pc,findFunctionEnd(pc->next));
5741 /*-------------------------------------------------------------------*/
5742 /* pic16_getRegFrompCodeOp - extract the register from a pCodeOp */
5743 /* if one is present. This is the common */
5744 /* part of pic16_getRegFromInstruction(2) */
5745 /*-------------------------------------------------------------------*/
5747 regs * pic16_getRegFrompCodeOp (pCodeOp *pcop) {
5748 if (!pcop) return NULL;
5750 switch(pcop->type) {
5763 return PCOR(pcop)->r;
5765 case PO_SFR_REGISTER:
5766 //fprintf (stderr, "%s - SFR\n", __FUNCTION__);
5767 return PCOR(pcop)->r;
5771 // fprintf(stderr, "pic16_getRegFromInstruction - bit or temp\n");
5772 return PCOR(pcop)->r;
5775 // return pic16_dirregWithName(PCOI(pcop)->r->name);
5778 return (PCOI(pcop)->r);
5783 return PCOR(pcop)->r;
5785 case PO_GPR_REGISTER:
5787 // fprintf(stderr, "pic16_getRegFromInstruction - dir\n");
5788 return PCOR(pcop)->r;
5791 //fprintf(stderr, "pic16_getRegFromInstruction - literal\n");
5796 //fprintf (stderr, "%s - label or address: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5801 /* this should never turn up */
5802 //fprintf (stderr, "%s - unused pCodeOp->type: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5809 fprintf(stderr, "pic16_getRegFromInstruction - unknown reg type %d (%s)\n",pcop->type, dumpPicOptype (pcop->type));
5817 /*-----------------------------------------------------------------*/
5818 /*-----------------------------------------------------------------*/
5819 regs * pic16_getRegFromInstruction(pCode *pc)
5825 PCI(pc)->num_ops == 0 ||
5826 (PCI(pc)->num_ops == 1 && PCI(pc)->isFastCall))
5830 fprintf(stderr, "pic16_getRegFromInstruction - reg type %s (%d)\n",
5831 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5834 return pic16_getRegFrompCodeOp (PCI(pc)->pcop);
5837 /*-------------------------------------------------------------------------------*/
5838 /* pic16_getRegFromInstruction2 - variant to support two memory operand commands */
5839 /*-------------------------------------------------------------------------------*/
5840 regs * pic16_getRegFromInstruction2(pCode *pc)
5846 PCI(pc)->num_ops == 0 ||
5847 (PCI(pc)->num_ops == 1)) // accept only 2 operand commands
5852 fprintf(stderr, "pic16_getRegFromInstruction2 - reg type %s (%d)\n",
5853 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5856 return pic16_getRegFrompCodeOp (PCOR2(PCI(pc)->pcop)->pcop2);
5859 /*-----------------------------------------------------------------*/
5860 /*-----------------------------------------------------------------*/
5862 static void AnalyzepBlock(pBlock *pb)
5869 /* Find all of the registers used in this pBlock
5870 * by looking at each instruction and examining it's
5873 for(pc = pb->pcHead; pc; pc = pc->next) {
5875 /* Is this an instruction with operands? */
5876 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
5878 if(PCI(pc)->pcop->type == PO_GPR_TEMP) {
5880 /* Loop through all of the registers declared so far in
5881 this block and see if we find this one there */
5883 regs *r = setFirstItem(pb->tregisters);
5886 if(r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) {
5887 PCOR(PCI(pc)->pcop)->r = r;
5890 r = setNextItem(pb->tregisters);
5894 /* register wasn't found */
5895 //r = Safe_calloc(1, sizeof(regs));
5896 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
5897 //addSet(&pb->tregisters, r);
5898 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
5899 //PCOR(PCI(pc)->pcop)->r = r;
5900 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
5902 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
5905 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
5906 if(PCOR(PCI(pc)->pcop)->r) {
5907 pic16_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
5908 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
5910 if(PCI(pc)->pcop->name)
5911 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
5913 fprintf(stderr,"ERROR: NULL register\n");
5922 /*-----------------------------------------------------------------*/
5924 /*-----------------------------------------------------------------*/
5925 #define PCI_HAS_LABEL(x) ((x) && (PCI(x)->label != NULL))
5927 static void InsertpFlow(pCode *pc, pCode **pflow)
5930 PCFL(*pflow)->end = pc;
5932 if(!pc || !pc->next)
5935 *pflow = pic16_newpCodeFlow();
5936 pic16_pCodeInsertAfter(pc, *pflow);
5939 /*-----------------------------------------------------------------*/
5940 /* pic16_BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
5941 /* the flow blocks. */
5943 * pic16_BuildFlow inserts pCodeFlow objects into the pCode chain at each
5944 * point the instruction flow changes.
5946 /*-----------------------------------------------------------------*/
5947 void pic16_BuildFlow(pBlock *pb)
5950 pCode *last_pci=NULL;
5957 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
5958 /* Insert a pCodeFlow object at the beginning of a pBlock */
5960 InsertpFlow(pb->pcHead, &pflow);
5962 //pflow = pic16_newpCodeFlow(); /* Create a new Flow object */
5963 //pflow->next = pb->pcHead; /* Make the current head the next object */
5964 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
5965 //pb->pcHead = pflow; /* Make the Flow object the head */
5968 for( pc = pic16_findNextInstruction(pb->pcHead);
5970 pc=pic16_findNextInstruction(pc)) {
5973 PCI(pc)->pcflow = PCFL(pflow);
5975 //fprintf(stderr," build: ");
5976 //pflow->print(stderr,pflow);
5978 if (checkLabel(pc)) {
5980 /* This instruction marks the beginning of a
5981 * new flow segment */
5986 /* If the previous pCode is not a flow object, then
5987 * insert a new flow object. (This check prevents
5988 * two consecutive flow objects from being insert in
5989 * the case where a skip instruction preceeds an
5990 * instruction containing a label.) */
5992 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
5993 InsertpFlow(pic16_findPrevInstruction(pc->prev), &pflow);
5995 PCI(pc)->pcflow = PCFL(pflow);
5999 if( PCI(pc)->isSkip) {
6001 /* The two instructions immediately following this one
6002 * mark the beginning of a new flow segment */
6004 while(pc && PCI(pc)->isSkip) {
6006 PCI(pc)->pcflow = PCFL(pflow);
6010 InsertpFlow(pc, &pflow);
6011 pc=pic16_findNextInstruction(pc->next);
6019 PCI(pc)->pcflow = PCFL(pflow);
6021 InsertpFlow(pc, &pflow);
6023 } else if ( PCI(pc)->isBranch && !checkLabel(pic16_findNextInstruction(pc->next))) {
6025 InsertpFlow(pc, &pflow);
6033 //fprintf (stderr,",end seq %d",GpcFlowSeq);
6035 PCFL(pflow)->end = pb->pcTail;
6038 /*-------------------------------------------------------------------*/
6039 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
6040 /* the flow blocks. */
6042 * unBuildFlow removes pCodeFlow objects from a pCode chain
6044 /*-----------------------------------------------------------------*/
6045 static void unBuildFlow(pBlock *pb)
6060 if(PCI(pc)->pcflow) {
6061 //Safe_free(PCI(pc)->pcflow);
6062 PCI(pc)->pcflow = NULL;
6065 } else if(isPCFL(pc) )
6074 /*-----------------------------------------------------------------*/
6075 /*-----------------------------------------------------------------*/
6076 static void dumpCond(int cond)
6079 static char *pcc_str[] = {
6093 int ncond = sizeof(pcc_str) / sizeof(char *);
6096 fprintf(stderr, "0x%04X\n",cond);
6098 for(i=0,j=1; i<ncond; i++, j<<=1)
6100 fprintf(stderr, " %s\n",pcc_str[i]);
6106 /*-----------------------------------------------------------------*/
6107 /*-----------------------------------------------------------------*/
6108 static void FlowStats(pCodeFlow *pcflow)
6116 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
6118 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6121 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
6126 fprintf(stderr, " FlowStats inCond: ");
6127 dumpCond(pcflow->inCond);
6128 fprintf(stderr, " FlowStats outCond: ");
6129 dumpCond(pcflow->outCond);
6133 /*-----------------------------------------------------------------*
6134 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
6135 * if it affects the banking bits.
6137 * return: -1 == Banking bits are unaffected by this pCode.
6139 * return: > 0 == Banking bits are affected.
6141 * If the banking bits are affected, then the returned value describes
6142 * which bits are affected and how they're affected. The lower half
6143 * of the integer maps to the bits that are affected, the upper half
6144 * to whether they're set or cleared.
6146 *-----------------------------------------------------------------*/
6148 static int isBankInstruction(pCode *pc)
6156 if( PCI(pc)->op == POC_MOVLB ||
6157 (( (reg = pic16_getRegFromInstruction(pc)) != NULL) && isBSR_REG(reg))) {
6158 bank = PCOL(pc)->lit;
6165 /*-----------------------------------------------------------------*/
6166 /*-----------------------------------------------------------------*/
6167 static void FillFlow(pCodeFlow *pcflow)
6176 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
6178 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6181 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
6188 isBankInstruction(pc);
6190 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
6194 fprintf(stderr, " FillFlow - Bad end of flow\n");
6196 fprintf(stderr, " FillFlow - Ending flow with\n ");
6197 pc->print(stderr,pc);
6200 fprintf(stderr, " FillFlow inCond: ");
6201 dumpCond(pcflow->inCond);
6202 fprintf(stderr, " FillFlow outCond: ");
6203 dumpCond(pcflow->outCond);
6207 /*-----------------------------------------------------------------*/
6208 /*-----------------------------------------------------------------*/
6209 static void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
6211 pCodeFlowLink *fromLink, *toLink;
6213 if(!from || !to || !to->pcflow || !from->pcflow)
6216 fromLink = pic16_newpCodeFlowLink(from->pcflow);
6217 toLink = pic16_newpCodeFlowLink(to->pcflow);
6219 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
6220 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
6224 pCode *pic16_getJumptabpCode (pCode *pc) {
6227 //fprintf (stderr, "%s - start for %p in %p", __FUNCTION__, pc, isPCI(pc) ? PCI(pc)->pcflow : NULL);
6228 //pc->print (stderr, pc);
6231 if (isPCI(pcinf) && PCI(pcinf)->op != POC_GOTO) return NULL;
6232 if (pcinf->type == PC_INFO && PCINF(pcinf)->type == INF_OPTIMIZATION) {
6233 switch (PCOO(PCINF(pcinf)->oper1)->type) {
6234 case OPT_JUMPTABLE_BEGIN:
6235 /* leading begin of jump table -- in one */
6236 pcinf = pic16_findPrevInstruction (pcinf);
6240 case OPT_JUMPTABLE_END:
6241 /* leading end of jumptable -- not in one */
6246 /* ignore all other PCInfos */
6250 pcinf = pcinf->prev;
6253 /* no PCInfo found -- not in a jumptable */
6257 /*-----------------------------------------------------------------*
6258 * void LinkFlow(pBlock *pb)
6260 * In pic16_BuildFlow, the PIC code has been partitioned into contiguous
6261 * non-branching segments. In LinkFlow, we determine the execution
6262 * order of these segments. For example, if one of the segments ends
6263 * with a skip, then we know that there are two possible flow segments
6264 * to which control may be passed.
6265 *-----------------------------------------------------------------*/
6266 static void LinkFlow(pBlock *pb)
6271 pCode *jumptab_pre = NULL;
6273 //fprintf(stderr,"linkflow \n");
6275 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6277 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6280 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
6282 //fprintf(stderr," link: ");
6283 //pcflow->print(stderr,pcflow);
6285 //FillFlow(PCFL(pcflow));
6287 pc = PCFL(pcflow)->end;
6289 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
6290 if(isPCI_SKIP(pc)) {
6291 // fprintf(stderr, "ends with skip\n");
6292 // pc->print(stderr,pc);
6294 pct=pic16_findNextInstruction(pc->next);
6295 LinkFlow_pCode(PCI(pc),PCI(pct));
6296 pct=pic16_findNextInstruction(pct->next);
6297 LinkFlow_pCode(PCI(pc),PCI(pct));
6301 if(isPCI_BRANCH(pc)) {
6302 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6304 /* handle GOTOs in jumptables */
6305 if ((jumptab_pre = pic16_getJumptabpCode (pc)) != NULL) {
6306 /* link to previous flow */
6307 //fprintf (stderr, "linked jumptable GOTO to predecessor %p\n", PCI(jumptab_pre)->pcflow);
6308 LinkFlow_pCode (PCI(jumptab_pre), PCI(pc));
6311 switch (PCI(pc)->op) {
6317 /* unconditional branches -- do not link to next instruction */
6318 //fprintf (stderr, "%s: flow ended by unconditional branch\n", __FUNCTION__);
6323 /* unconditional calls -- link to next instruction */
6324 //fprintf (stderr, "%s: flow ended by CALL\n", __FUNCTION__);
6325 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6336 /* conditional branches -- also link to next instruction */
6337 //fprintf (stderr, "%s: flow ended by conditional branch\n", __FUNCTION__);
6338 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6342 fprintf (stderr, "%s: unhandled op %u (%s)\n", __FUNCTION__, PCI(pc)->op , PCI(pc)->mnemonic);
6343 assert (0 && "unhandled branching instruction");
6347 //fprintf(stderr, "ends with branch\n ");
6348 //pc->print(stderr,pc);
6350 if(!(pcol && isPCOLAB(pcol))) {
6351 if((PCI(pc)->op != POC_RETLW)
6352 && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RCALL) && (PCI(pc)->op != POC_RETFIE) ) {
6354 /* continue if label is '$' which assembler knows how to parse */
6355 if(((PCI(pc)->pcop->type == PO_STR) && !strcmp(PCI(pc)->pcop->name, "$")))continue;
6357 if(pic16_pcode_verbose) {
6358 pc->print(stderr,pc);
6359 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
6365 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
6366 LinkFlow_pCode(PCI(pc),PCI(pct));
6368 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
6369 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
6371 // fprintf(stderr,"pic16_newpCodeOpLabel: key=%d, name=%s\n",pcol->key,(PCOP(pcol)->name)?(PCOP(pcol)->name):"<unknown>");
6377 //fprintf(stderr, "ends with non-branching instruction:\n");
6378 //pc->print(stderr,pc);
6380 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6386 //fprintf(stderr, "ends with unknown\n");
6387 //pc->print(stderr,pc);
6391 //fprintf(stderr, "ends with nothing: ERROR\n");
6395 /*-----------------------------------------------------------------*/
6396 /*-----------------------------------------------------------------*/
6398 /*-----------------------------------------------------------------*/
6399 /*-----------------------------------------------------------------*/
6400 int pic16_isPCinFlow(pCode *pc, pCode *pcflow)
6406 if((!isPCI(pc) && !isPCAD(pc)) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
6409 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
6419 /*-----------------------------------------------------------------*/
6420 /* insertBankSwitch - inserts a bank switch statement in the */
6421 /* assembly listing */
6423 /* position == 0: insert before */
6424 /* position == 1: insert after pc */
6425 /* position == 2: like 0 but previous was a skip instruction */
6426 /*-----------------------------------------------------------------*/
6427 pCodeOp *pic16_popGetLabel(unsigned int key);
6428 extern int pic16_labelOffset;
6430 static void insertBankSwitch(unsigned char position, pCode *pc)
6437 /* emit BANKSEL [symbol] */
6440 new_pc = pic16_newpCodeAsmDir("BANKSEL", "%s", pic16_get_op_from_instruction(PCI(pc)));
6442 // position = 0; // position is always before (sanity check!)
6445 fprintf(stderr, "%s:%d: inserting bank switch (pos: %d)\n", __FUNCTION__, __LINE__, position);
6446 pc->print(stderr, pc);
6451 /* insert the bank switch after this pc instruction */
6452 pCode *pcnext = pic16_findNextInstruction(pc);
6454 pic16_pCodeInsertAfter(pc, new_pc);
6455 if(pcnext)pc = pcnext;
6459 /* insert the bank switch BEFORE this pc instruction */
6460 pic16_pCodeInsertAfter(pc->prev, new_pc);
6465 pCode *pcnext, *pcprev, *npci, *ppc;
6467 int ofs1=0, ofs2=0, len=0;
6469 /* just like 0, but previous was a skip instruction,
6470 * so some care should be taken */
6472 pic16_labelOffset += 10000;
6473 tlbl = newiTempLabel(NULL);
6475 /* invert skip instruction */
6476 pcprev = pic16_findPrevInstruction(pc->prev);
6477 ipci = PCI(pcprev)->inverted_op;
6478 npci = pic16_newpCode(ipci, PCI(pcprev)->pcop);
6480 // fprintf(stderr, "%s:%d old OP: %d\tnew OP: %d\n", __FILE__, __LINE__, PCI(pcprev)->op, ipci);
6482 /* copy info from old pCode */
6483 ofs1 = ofs2 = sizeof( pCode ) + sizeof(PIC_OPCODE);
6484 len = sizeof(pCodeInstruction) - ofs1 - sizeof( char const * const *);
6485 ofs1 += strlen( PCI(pcprev)->mnemonic) + 1;
6486 ofs2 += strlen( PCI(npci)->mnemonic) + 1;
6487 memcpy(&PCI(npci)->from, &PCI(pcprev)->from, (char *)(&(PCI(npci)->pci_magic)) - (char *)(&(PCI(npci)->from)));
6488 PCI(npci)->op = PCI(pcprev)->inverted_op;
6490 /* unlink old pCode */
6492 ppc->next = pcprev->next;
6493 pcprev->next->prev = ppc;
6494 pic16_pCodeInsertAfter(ppc, npci);
6496 /* extra instructions to handle invertion */
6497 pcnext = pic16_newpCode(POC_BRA, pic16_popGetLabel(tlbl->key));
6498 pic16_pCodeInsertAfter(npci, pcnext);
6499 pic16_pCodeInsertAfter(pc->prev, new_pc);
6501 pcnext = pic16_newpCodeLabel(NULL,tlbl->key+100+pic16_labelOffset);
6502 pic16_pCodeInsertAfter(pc, pcnext);
6507 /* Move the label, if there is one */
6508 if(PCI(pc)->label) {
6509 // fprintf(stderr, "%s:%d: moving label due to bank switch directive src= 0x%p dst= 0x%p\n",
6510 // __FILE__, __LINE__, pc, new_pc);
6511 PCAD(new_pc)->pci.label = PCI(pc)->label;
6512 PCI(pc)->label = NULL;
6517 /*-----------------------------------------------------------------*/
6518 /*int compareBankFlow - compare the banking requirements between */
6520 /*-----------------------------------------------------------------*/
6521 static int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
6524 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
6527 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
6530 if(pcflow->firstBank == -1)
6534 if(pcflowLink->pcflow->firstBank == -1) {
6535 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
6536 pcflowLink->pcflow->to :
6537 pcflowLink->pcflow->from);
6538 return compareBankFlow(pcflow, pctl, toORfrom);
6542 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
6545 pcflowLink->bank_conflict++;
6546 pcflowLink->pcflow->FromConflicts++;
6547 pcflow->ToConflicts++;
6550 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
6553 pcflowLink->bank_conflict++;
6554 pcflowLink->pcflow->ToConflicts++;
6555 pcflow->FromConflicts++;
6559 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
6560 pcflowLink->pcflow->pc.seq,
6561 pcflowLink->pcflow->FromConflicts,
6562 pcflowLink->pcflow->ToConflicts);
6569 /*-----------------------------------------------------------------*/
6570 /*-----------------------------------------------------------------*/
6571 static void DumpFlow(pBlock *pb)
6575 pCodeFlowLink *pcfl;
6578 fprintf(stderr,"Dump flow \n");
6579 pb->pcHead->print(stderr, pb->pcHead);
6581 pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6582 pcflow->print(stderr,pcflow);
6584 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6586 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6588 if(!isPCFL(pcflow)) {
6589 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
6592 fprintf(stderr,"dumping: ");
6593 pcflow->print(stderr,pcflow);
6594 FlowStats(PCFL(pcflow));
6596 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6598 pc = PCODE(pcfl->pcflow);
6600 fprintf(stderr, " from seq %d:\n",pc->seq);
6602 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
6603 pc->print(stderr,pc);
6608 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6610 pc = PCODE(pcfl->pcflow);
6612 fprintf(stderr, " to seq %d:\n",pc->seq);
6614 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
6615 pc->print(stderr,pc);
6624 /*-----------------------------------------------------------------*/
6625 /*-----------------------------------------------------------------*/
6626 static int OptimizepBlock(pBlock *pb)
6631 if(!pb || !peepOptimizing)
6634 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
6636 for(pc = pb->pcHead; pc; pc = pc->next)
6637 matches += pic16_pCodePeepMatchRule(pc);
6640 pc = pic16_findNextInstruction(pb->pcHead);
6648 if(pic16_pCodePeepMatchRule(pc)) {
6653 pc = pic16_findNextInstruction(pcprev->next);
6655 pc = pic16_findNextInstruction(pb->pcHead);
6657 pc = pic16_findNextInstruction(pc->next);
6661 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
6666 /*-----------------------------------------------------------------*/
6667 /*-----------------------------------------------------------------*/
6668 static pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
6672 for(pc = pcs; pc; pc = pc->next) {
6674 if(((pc->type == PC_OPCODE) || (pc->type == PC_INLINE) || (pc->type == PC_ASMDIR)) &&
6676 (PCI(pc)->pcop->type == PO_LABEL) &&
6677 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
6685 /*-----------------------------------------------------------------*/
6686 /*-----------------------------------------------------------------*/
6687 static void exchangeLabels(pCodeLabel *pcl, pCode *pc)
6694 (PCI(pc)->pcop->type == PO_LABEL)) {
6696 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6698 // fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
6699 // if(pcol->pcop.name)
6700 // Safe_free(pcol->pcop.name);
6702 /* If the key is negative, then we (probably) have a label to
6703 * a function and the name is already defined */
6706 sprintf(s=buffer,"_%05d_DS_",pcl->key);
6710 //sprintf(buffer,"_%05d_DS_",pcl->key);
6712 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
6714 pcol->pcop.name = Safe_strdup(s);
6715 pcol->key = pcl->key;
6716 //pc->print(stderr,pc);
6723 /*-----------------------------------------------------------------*/
6724 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
6725 /* pCode chain if they're not used. */
6726 /*-----------------------------------------------------------------*/
6727 static void pBlockRemoveUnusedLabels(pBlock *pb)
6729 pCode *pc; pCodeLabel *pcl;
6734 for(pc = pb->pcHead; (pc=pic16_findNextInstruction(pc->next)) != NULL; ) {
6736 pBranch *pbr = PCI(pc)->label;
6737 if(pbr && pbr->next) {
6738 pCode *pcd = pb->pcHead;
6740 // fprintf(stderr, "multiple labels\n");
6741 // pc->print(stderr,pc);
6746 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
6747 //fprintf(stderr,"Used by:\n");
6748 //pcd->print(stderr,pcd);
6750 exchangeLabels(PCL(pbr->pc),pcd);
6759 for(pc = pb->pcHead; pc; pc = pc->next) {
6761 if(isPCL(pc)) // pc->type == PC_LABEL)
6763 else if (isPCI(pc) && PCI(pc)->label) //((pc->type == PC_OPCODE) && PCI(pc)->label)
6764 pcl = PCL(PCI(pc)->label->pc);
6767 // fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6769 /* This pCode is a label, so search the pBlock to see if anyone
6772 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))
6774 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
6775 /* Couldn't find an instruction that refers to this label
6776 * So, unlink the pCode label from it's pCode chain
6777 * and destroy the label */
6778 // fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6780 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
6781 if(pc->type == PC_LABEL) {
6782 pic16_unlinkpCode(pc);
6783 pCodeLabelDestruct(pc);
6785 unlinkpCodeFromBranch(pc, PCODE(pcl));
6786 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
6787 Safe_free(pc->label);
6797 /*-----------------------------------------------------------------*/
6798 /* pic16_pBlockMergeLabels - remove the pCode labels from the pCode */
6799 /* chain and put them into pBranches that are */
6800 /* associated with the appropriate pCode */
6802 /*-----------------------------------------------------------------*/
6803 void pic16_pBlockMergeLabels(pBlock *pb)
6806 pCode *pc, *pcnext=NULL;
6811 /* First, Try to remove any unused labels */
6812 //pBlockRemoveUnusedLabels(pb);
6814 /* Now loop through the pBlock and merge the labels with the opcodes */
6817 // for(pc = pb->pcHead; pc; pc = pc->next) {
6820 pCode *pcn = pc->next;
6822 if(pc->type == PC_LABEL) {
6824 // fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
6825 // fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
6827 if((pcnext = pic16_findNextInstruction(pc) )) {
6829 // pcnext->print(stderr, pcnext);
6831 // Unlink the pCode label from it's pCode chain
6832 pic16_unlinkpCode(pc);
6834 // fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
6835 // And link it into the instruction's pBranch labels. (Note, since
6836 // it's possible to have multiple labels associated with one instruction
6837 // we must provide a means to accomodate the additional labels. Thus
6838 // the labels are placed into the singly-linked list "label" as
6839 // opposed to being a single member of the pCodeInstruction.)
6841 //_ALLOC(pbr,sizeof(pBranch));
6843 pbr = Safe_calloc(1,sizeof(pBranch));
6847 PCI(pcnext)->label = pic16_pBranchAppend(PCI(pcnext)->label,pbr);
6850 if(pic16_pcode_verbose)
6851 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
6853 } else if(pc->type == PC_CSOURCE) {
6855 /* merge the source line symbolic info into the next instruction */
6856 if((pcnext = pic16_findNextInstruction(pc) )) {
6858 // Unlink the pCode label from it's pCode chain
6859 pic16_unlinkpCode(pc);
6860 PCI(pcnext)->cline = PCCS(pc);
6861 //fprintf(stderr, "merging CSRC\n");
6862 //genericPrint(stderr,pcnext);
6868 pBlockRemoveUnusedLabels(pb);
6872 /*-----------------------------------------------------------------*/
6873 /*-----------------------------------------------------------------*/
6874 static int OptimizepCode(char dbName)
6876 #define MAX_PASSES 4
6885 DFPRINTF((stderr," Optimizing pCode\n"));
6889 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6890 if('*' == dbName || getpBlock_dbName(pb) == dbName)
6891 matches += OptimizepBlock(pb);
6894 while(matches && ++passes < MAX_PASSES);
6901 const char *pic16_pCodeOpType(pCodeOp *pcop);
6902 const char *pic16_pCodeOpSubType(pCodeOp *pcop);
6905 /*-----------------------------------------------------------------*/
6906 /* pic16_popCopyGPR2Bit - copy a pcode operator */
6907 /*-----------------------------------------------------------------*/
6909 pCodeOp *pic16_popCopyGPR2Bit(pCodeOp *pc, int bitval)
6913 // fprintf(stderr, "%s:%d pc type: %s\tname: %s\n", __FILE__, __LINE__, pic16_pCodeOpType(pc), pc->name);
6916 pcop = pic16_newpCodeOpBit(pc->name, bitval, 0, pc->type);
6918 if(PCOR(pc)->r)pcop = pic16_newpCodeOpBit(PCOR(pc)->r->name, bitval, 0, pc->type);
6921 assert(pcop != NULL);
6923 if( !( (pcop->type == PO_LABEL) ||
6924 (pcop->type == PO_LITERAL) ||
6925 (pcop->type == PO_STR) ))
6926 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
6927 PCOR(pcop)->r->wasUsed = 1;
6928 PCOR(pcop)->instance = PCOR(pc)->instance;
6934 /*----------------------------------------------------------------------*
6935 * pic16_areRegsSame - check to see if the names of two registers match *
6936 *----------------------------------------------------------------------*/
6937 int pic16_areRegsSame(regs *r1, regs *r2)
6939 if(!strcmp(r1->name, r2->name))return 1;
6945 /*-----------------------------------------------------------------*/
6946 /*-----------------------------------------------------------------*/
6947 static void pic16_FixRegisterBanking(pBlock *pb)
6951 regs *reg, *prevreg;
6952 unsigned char flag=0;
6957 pc = pic16_findNextpCode(pb->pcHead, PC_OPCODE);
6960 /* loop through all of the flow blocks with in one pblock */
6962 // fprintf(stderr,"%s:%d: Register banking\n", __FUNCTION__, __LINE__);
6966 /* at this point, pc should point to a PC_FLOW object */
6967 /* for each flow block, determine the register banking
6971 /* if label, then might come from other point, force banksel */
6972 if(isPCL(pc))prevreg = NULL;
6974 if(!isPCI(pc))goto loop;
6976 if(PCI(pc)->label)prevreg = NULL;
6978 if(PCI(pc)->is2MemOp)goto loop;
6980 /* if goto, then force banksel */
6981 // if(PCI(pc)->op == POC_GOTO)prevreg = NULL;
6983 reg = pic16_getRegFromInstruction(pc);
6986 pc->print(stderr, pc);
6987 fprintf(stderr, "reg = %p\n", reg);
6990 fprintf(stderr, "%s:%d: %s %d\n",__FUNCTION__, __LINE__, reg->name, reg->rIdx);
6991 fprintf(stderr, "addr = 0x%03x, bit=%d\tfix=%d\n",
6992 reg->address,reg->isBitField, reg->isFixed);
6996 /* now make some tests to make sure that instruction needs bank switch */
6998 /* if no register exists, and if not a bit opcode goto loop */
7000 if(!(PCI(pc)->pcop && PCI(pc)->pcop->type == PO_GPR_BIT))goto loop;
7003 if(isPCI_SKIP(pc)) {
7004 // fprintf(stderr, "instruction is SKIP instruction\n");
7007 if(reg && isACCESS_BANK(reg))goto loop;
7009 if(!isBankInstruction(pc))goto loop;
7011 if(isPCI_LIT(pc))goto loop;
7013 if(PCI(pc)->op == POC_CALL)goto loop;
7015 /* Examine the instruction before this one to make sure it is
7016 * not a skip type instruction */
7017 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
7019 flag = 0; /* add before this instruction */
7021 /* if previous instruction is a skip one, then set flag
7022 * to 2 and call insertBankSwitch */
7023 if(pcprev && isPCI_SKIP(pcprev)) {
7028 if(pic16_options.opt_banksel>0) {
7029 char op1[128], op2[128];
7032 strcpy(op1, pic16_get_op_from_instruction(PCI(pc)));
7033 strcpy(op2, pic16_get_op_from_instruction(PCI(pcprev)));
7034 if(!strcmp(op1, op2))goto loop;
7038 insertBankSwitch(flag, pc);
7040 // fprintf(stderr, "BANK SWITCH inserted\n");
7048 /** ADDITIONS BY RAPHAEL NEIDER, 2004-11-16: GOTO OPTIMIZATIONS **/
7050 /* Returns the (maximum of the) number of bytes used by the specified pCode. */
7051 int instrSize (pCode *pc)
7056 if (!PCAD(pc)->directive || strlen (PCAD(pc)->directive) < 3) return 0;
7057 return 4; // assumes only regular instructions using <= 4 bytes
7060 if (isPCI(pc)) return PCI(pc)->isize;
7065 /* Returns 1 if pc is referenced by the given label (either
7066 * pc is the label itself or is an instruction with an attached
7068 * Returns 0 if pc is not preceeded by the specified label.
7070 int isLabel (pCode *pc, char *label)
7074 // label attached to the pCode?
7075 if (isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO) {
7076 pBranch *lab = NULL;
7077 lab = PCI(pc)->label;
7080 if (isPCL(lab->pc) && strcmp(PCL(lab->pc)->label, label) == 0) {
7087 // is inline assembly label?
7088 if (isPCAD(pc) && PCAD(pc)->directive == NULL && PCAD(pc)->arg) {
7089 // do not compare trailing ':'
7090 if (strncmp (PCAD(pc)->arg, label, strlen (label)) == 0) {
7097 if (strcmp(PCL(pc)->label,label) == 0) {
7102 // no label/no label attached/wrong label(s)
7106 /* Returns the distance to the given label in terms of words.
7107 * Labels are searched only within -max .. max words from pc.
7108 * Returns max if the label could not be found or
7109 * its distance from pc in (-max..+max).
7111 int findpCodeLabel (pCode *pc, char *label, int max, pCode **target) {
7112 int dist = instrSize(pc);
7116 while (dist < max && curr && !isLabel (curr, label)) {
7118 dist += instrSize(curr); // sizeof (instruction)
7120 if (curr && dist < max) {
7121 if (target != NULL) *target = curr;
7126 curr = pic16_findNextInstruction (pc->next);
7128 while (dist < max && curr && !isLabel (curr, label)) {
7129 dist += instrSize(curr); // sizeof (instruction)
7132 if (curr && dist < max) {
7133 if (target != NULL) *target = curr;
7137 if (target != NULL) *target = NULL;
7141 /* Returns -1 if pc does NOT denote an instruction like
7143 * Otherwise we return
7144 * (a) 0x10 + i for BTFSS
7145 * (b) 0x00 + i for BTFSC
7147 int isSkipOnStatus (pCode *pc)
7151 if (!pc || !isPCI(pc)) return -1;
7152 if (PCI(pc)->op == POC_BTFSS) res = 0x10;
7153 else if (PCI(pc)->op == POC_BTFSC) res = 0x00;
7156 pcop = PCI(pc)->pcop;
7158 if (pcop->type == PO_STATUS || (pcop->type == PO_GPR_BIT && strcmp(pcop->name, "STATUS") == 0)) {
7159 return res + ((pCodeOpRegBit *)pcop)->bit;
7165 /* Returns 1 if pc is one of BC, BZ, BOV, BN, BNC, BNZ, BNOV or BNN,
7166 * returns 0 otherwise. */
7167 int isConditionalBranch (pCode *pc)
7169 if (!pc || !isPCI_BRANCH(pc)) return 0;
7171 switch (PCI(pc)->op) {
7189 /* Returns 1 if pc has a label attached to it.
7190 * This can be either a label stored in the pCode itself (.label)
7191 * or a label making up its own pCode preceding this pc.
7192 * Returns 0 if pc cannot be reached directly via a label.
7194 int hasNoLabel (pCode *pc)
7199 // are there any label pCodes between pc and the previous instruction?
7200 prev = pic16_findPrevInstruction (pc->prev);
7201 while (pc && pc != prev) {
7202 // pCode with attached label?
7203 if ((isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO)
7204 && PCI(pc)->label) {
7207 // is inline assembly label?
7208 if (isPCAD(pc) && PCAD(pc)->directive == NULL) return 0;
7209 if (isPCW(pc) && PCW(pc)->label) return 0;
7212 if (isPCL(pc)) return 0;
7221 static void pic16_InsertCommentAfter (pCode *pc, const char *fmt, ...) {
7226 vsprintf (buf, fmt, va);
7229 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(buf));
7232 /* Replaces the old pCode with the new one, moving the labels,
7233 * C source line and probably flow information to the new pCode.
7235 void pic16_pCodeReplace (pCode *oldPC, pCode *newPC) {
7236 if (!oldPC || !newPC || !isPCI(oldPC) || !isPCI(newPC))
7239 /* first move all labels from old to new */
7240 PCI(newPC)->label = pic16_pBranchAppend (PCI(oldPC)->label, PCI(newPC)->label);
7241 PCI(oldPC)->label = NULL;
7244 /* move C source line (if possible) */
7245 if (PCI(oldPC)->cline && !PCI(newPC)->cline)
7246 PCI(newPC)->cline = PCI(oldPC)->cline;
7249 /* keep flow information intact */
7250 newPC->seq = oldPC->seq;
7251 PCI(newPC)->pcflow = PCI(oldPC)->pcflow;
7252 if (PCI(newPC)->pcflow && PCI(newPC)->pcflow->end == oldPC) {
7253 PCI(newPC)->pcflow->end = newPC;
7256 /* insert a comment stating which pCode has been replaced */
7258 if (pic16_pcode_verbose || pic16_debug_verbose) {
7260 pic16_pCode2str (pc_str, 256, oldPC);
7261 pic16_InsertCommentAfter (oldPC->prev, "%s: replaced %s", __FUNCTION__, pc_str);
7265 /* insert new pCode into pBlock */
7266 pic16_pCodeInsertAfter (oldPC, newPC);
7267 pic16_unlinkpCode (oldPC);
7269 /* destruct replaced pCode */
7270 oldPC->destruct (oldPC);
7273 /* Returns the inverted conditional branch (if any) or NULL.
7274 * pcop must be set to the new jump target.
7276 pCode *getNegatedBcc (pCode *bcc, pCodeOp *pcop)
7280 if (!bcc || !isPCI(bcc)) return NULL;
7282 switch (PCI(bcc)->op) {
7283 case POC_BC: newBcc = pic16_newpCode (POC_BNC , pcop); break;
7284 case POC_BZ: newBcc = pic16_newpCode (POC_BNZ , pcop); break;
7285 case POC_BOV: newBcc = pic16_newpCode (POC_BNOV, pcop); break;
7286 case POC_BN: newBcc = pic16_newpCode (POC_BNN , pcop); break;
7287 case POC_BNC: newBcc = pic16_newpCode (POC_BC , pcop); break;
7288 case POC_BNZ: newBcc = pic16_newpCode (POC_BZ , pcop); break;
7289 case POC_BNOV: newBcc = pic16_newpCode (POC_BOV , pcop); break;
7290 case POC_BNN: newBcc = pic16_newpCode (POC_BN , pcop); break;
7297 #define MAX_DIST_GOTO 0x7FFFFFFF
7298 #define MAX_DIST_BRA 1020 // maximum offset (in bytes) possible with BRA
7299 #define MAX_DIST_BCC 120 // maximum offset (in bytes) possible with Bcc
7300 #define MAX_JUMPCHAIN_DEPTH 16 // number of GOTOs to follow in resolveJumpChain() (to prevent endless loops)
7301 #define IS_GOTO(arg) ((arg) && isPCI(arg) && (PCI(arg)->op == POC_GOTO || PCI(arg)->op == POC_BRA))
7303 /* Follows GOTO/BRA instructions to their target instructions, stores the
7304 * final destination (not a GOTO or BRA instruction) in target and returns
7305 * the distance from the original pc to *target.
7307 int resolveJumpChain (pCode *pc, pCode **target, pCodeOp **pcop) {
7310 pCodeOp *lastPCOP = NULL;
7314 //fprintf (stderr, "%s:%d: -=-", __FUNCTION__, __LINE__);
7316 /* only follow unconditional branches, except for the initial pCode (which may be a conditional branch) */
7317 while (curr && (last != curr) && (depth++ < MAX_JUMPCHAIN_DEPTH) && isPCI(curr)
7318 && (PCI(curr)->op == POC_GOTO || PCI(curr)->op == POC_BRA || (curr == pc && isConditionalBranch(curr)))) {
7320 lastPCOP = PCI(curr)->pcop;
7321 dist = findpCodeLabel (pc, PCI(curr)->pcop->name, MAX_DIST_GOTO, &curr);
7322 //fprintf (stderr, "last:%p, curr:%p, label:%s\n", last, curr, PCI(last)->pcop->name);
7325 if (target) *target = last;
7326 if (pcop) *pcop = lastPCOP;
7330 /* Returns pc if it is not a OPT_JUMPTABLE_BEGIN INFO pCode.
7331 * Otherwise the first pCode after the jumptable (after
7332 * the OPT_JUMPTABLE_END tag) is returned.
7334 pCode *skipJumptables (pCode *pc, int *isJumptable)
7337 if (!pc) return NULL;
7339 while (pc->type == PC_INFO && PCINF(pc)->type == INF_OPTIMIZATION && PCOO(PCINF(pc)->oper1)->type == OPT_JUMPTABLE_BEGIN) {
7341 //fprintf (stderr, "SKIPPING jumptable\n");
7343 //pc->print(stderr, pc);
7345 } while (pc && (pc->type != PC_INFO || PCINF(pc)->type != INF_OPTIMIZATION
7346 || PCOO(PCINF(pc)->oper1)->type != OPT_JUMPTABLE_END));
7347 //fprintf (stderr, "<<JUMPTAB:\n");
7348 // skip OPT_END as well
7349 if (pc) pc = pc->next;
7355 pCode *pic16_findNextInstructionSkipJumptables (pCode *pc, int *isJumptable)
7359 while (pc && !isPCI(pc) && !isPCAD(pc) && !isPCW(pc)) {
7360 // set pc to the first pCode after a jumptable, leave pc untouched otherwise
7361 pc = skipJumptables (pc, &isJumptab);
7363 // pc is the first pCode after the jumptable
7366 // pc has not been changed by skipJumptables()
7374 /* Turn GOTOs into BRAs if distance between GOTO and label
7375 * is less than 1024 bytes.
7377 * This method is especially useful if GOTOs after BTFS[SC]
7378 * can be turned into BRAs as GOTO would cost another NOP
7381 void pic16_OptimizeJumps ()
7384 pCode *pc_prev = NULL;
7385 pCode *pc_next = NULL;
7388 int change, iteration, isJumptab;
7391 int opt=0, toofar=0, opt_cond = 0, cond_toofar=0, opt_reorder = 0, opt_gotonext = 0, opt_gotochain = 0;
7393 if (!the_pFile) return;
7395 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7397 for (pb = the_pFile->pbHead; pb != NULL; pb = pb->next) {
7398 int matchedInvertRule = 1;
7401 //fprintf (stderr, "%s:%d: iterating over pBlock %p\n", __FUNCTION__, __LINE__, pb);
7403 pc = pic16_findNextInstruction (pb->pcHead);
7406 pc_next = pic16_findNextInstructionSkipJumptables (pc->next, &isJumptab);
7408 // skip jumptable, i.e. start over with no pc_prev!
7414 /* (1) resolve chained jumps
7415 * Do not perform this until pattern (4) is no longer present! Otherwise we will
7416 * (a) leave dead code in and
7417 * (b) skip over the dead code with an (unneccessary) jump.
7419 if (!matchedInvertRule && (IS_GOTO(pc) || isConditionalBranch(pc))) {
7420 pCodeOp *lastTargetOp = NULL;
7421 int newDist = resolveJumpChain (pc, &target, &lastTargetOp);
7422 int maxDist = MAX_DIST_BCC;
7423 if (PCI(pc)->op == POC_BRA) maxDist = MAX_DIST_BRA;
7424 if (PCI(pc)->op == POC_GOTO) maxDist = MAX_DIST_GOTO;
7426 /* be careful NOT to make the jump instruction longer (might break previously shortened jumps!) */
7427 if (lastTargetOp && newDist <= maxDist && lastTargetOp != PCI(pc)->pcop
7428 && strcmp (lastTargetOp->name, PCI(pc)->pcop->name) != 0) {
7429 //fprintf (stderr, "(1) ");pc->print(stderr, pc); fprintf (stderr, " --> %s\n", lastTargetOp->name);
7430 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(1) jump chain resolved")); }
7431 PCI(pc)->pcop->name = lastTargetOp->name;
7440 int condBraType = isSkipOnStatus(pc_prev);
7441 label = PCI(pc)->pcop->name;
7442 dist = findpCodeLabel(pc, label, MAX_DIST_BRA, &target);
7443 if (dist < 0) dist = -dist;
7444 //fprintf (stderr, "distance: %d (", dist); pc->print(stderr, pc);fprintf (stderr, ")\n");
7448 /* (2) remove "GOTO label; label:" */
7449 if (isLabel (pc_next, label)) {
7450 //fprintf (stderr, "(2) GOTO next instruction: ");pc->print(stderr, pc);fprintf (stderr, " --> ");pc_next->print(stderr, pc_next); fprintf(stderr, "\n");
7451 // first remove all preceeding SKIP instructions
7452 while (pc_prev && isPCI_SKIP(pc_prev)) {
7453 // attach labels on this instruction to pc_next
7454 //fprintf (stderr, "(2) preceeding SKIP removed: ");pc_prev->print(stderr, pc_prev);fprintf(stderr, "\n");
7455 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc_prev)->label, PCI(pc_next)->label);
7456 PCI(pc_prev)->label = NULL;
7457 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(2) SKIP removed")); }
7458 pic16_unlinkpCode (pc_prev);
7459 pc_prev = pic16_findPrevInstruction (pc);
7461 // now remove the redundant goto itself
7462 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pc_next)->label);
7463 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP("(2) GOTO next instruction removed")); }
7464 pic16_unlinkpCode (pc);
7465 pc = pic16_findPrevInstruction(pc_next->prev);
7466 isHandled = 1; // do not perform further optimizations
7472 /* (3) turn BTFSx STATUS,i; GOTO label into Bcc label if possible */
7473 if (!isHandled && condBraType != -1 && hasNoLabel(pc)) {
7474 if (dist < MAX_DIST_BCC) {
7476 switch (condBraType) {
7477 case 0x00: bcc = pic16_newpCode (POC_BC, PCI(pc)->pcop);break;
7478 // no BDC on DIGIT CARRY available
7479 case 0x02: bcc = pic16_newpCode (POC_BZ, PCI(pc)->pcop);break;
7480 case 0x03: bcc = pic16_newpCode (POC_BOV, PCI(pc)->pcop);break;
7481 case 0x04: bcc = pic16_newpCode (POC_BN, PCI(pc)->pcop);break;
7482 case 0x10: bcc = pic16_newpCode (POC_BNC, PCI(pc)->pcop);break;
7483 // no BNDC on DIGIT CARRY available
7484 case 0x12: bcc = pic16_newpCode (POC_BNZ, PCI(pc)->pcop);break;
7485 case 0x13: bcc = pic16_newpCode (POC_BNOV, PCI(pc)->pcop);break;
7486 case 0x14: bcc = pic16_newpCode (POC_BNN, PCI(pc)->pcop);break;
7488 // no replacement possible
7493 // ATTENTION: keep labels attached to BTFSx!
7494 // HINT: GOTO is label free (checked above)
7495 //fprintf (stderr, "%s:%d: (3) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(bcc)->mnemonic, label);
7496 isHandled = 1; // do not perform further optimizations
7497 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(3) conditional branch introduced")); }
7498 pic16_pCodeReplace (pc_prev, bcc);
7505 //fprintf (stderr, "(%d, too far for Bcc)\n", dist);
7511 // (4) eliminate the following (common) tripel:
7513 // labels1: Bcc label2;
7514 // GOTO somewhere; ; <-- instruction referenced by pc
7516 // and replace it by
7517 // labels1: B#(cc) somewhere; ; #(cc) is the negated condition cc
7519 // ATTENTION: all labels pointing to "Bcc label2" must be attached
7520 // to <cont.> instead
7521 // ATTENTION: This optimization is only valid if <pred.> is
7522 // not a skip operation!
7523 // ATTENTION: somewhere must be within MAX_DIST_BCC bytes!
7524 // ATTENTION: no label may be attached to the GOTO instruction!
7525 if (isConditionalBranch(pc_prev)
7526 && (!isPCI_SKIP(pic16_findPrevInstruction(pc_prev->prev)))
7527 && (dist < MAX_DIST_BCC)
7528 && isLabel(pc_next,PCI(pc_prev)->pcop->name)
7529 && hasNoLabel(pc)) {
7530 pCode *newBcc = getNegatedBcc (pc_prev, PCI(pc)->pcop);
7533 //fprintf (stderr, "%s:%d: (4) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBcc)->mnemonic, label);
7534 isHandled = 1; // do not perform further optimizations
7535 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(4) conditional skipping branch inverted")); }
7536 pic16_pCodeReplace (pc_prev, newBcc);
7541 matchedInvertRule++;
7546 /* (5) now just turn GOTO into BRA */
7547 if (!isHandled && (PCI(pc)->op == POC_GOTO)) {
7548 if (dist < MAX_DIST_BRA) {
7549 pCode *newBra = pic16_newpCode (POC_BRA, PCI(pc)->pcop);
7550 //fprintf (stderr, "%s:%d: (5) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBra)->mnemonic, label);
7551 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc->prev, pic16_newpCodeCharP("(5) GOTO replaced by BRA")); }
7552 pic16_pCodeReplace (pc, newBra);
7557 //fprintf (stderr, "(%d, too far for BRA)\n", dist);
7560 } // if (!isHandled)
7567 pBlockRemoveUnusedLabels (pb);
7569 // This line enables goto chain resolution!
7570 if (matchedInvertRule > 1) matchedInvertRule = 1; else matchedInvertRule = 0;
7573 } while (change); /* fixpoint iteration per pBlock */
7576 // emit some statistics concerning goto-optimization
7578 if (pic16_debug_verbose || pic16_pcode_verbose) {
7579 fprintf (stderr, "optimize-goto:\n"
7580 "\t%5d GOTO->BRA; (%d GOTOs too far)\n"
7581 "\t%5d BTFSx, GOTO->Bcc (%d too far)\n"
7582 "\t%5d conditional \"skipping\" jumps inverted\n"
7583 "\t%5d GOTOs to next instruction removed\n"
7584 "\t%5d chained GOTOs resolved\n",
7585 opt, toofar, opt_cond, cond_toofar, opt_reorder, opt_gotonext, opt_gotochain);
7588 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7592 #undef MAX_JUMPCHAIN_DEPTH
7593 #undef MAX_DIST_GOTO
7597 /** END OF RAPHAEL NEIDER'S ADDITIONS **/
7599 static void pBlockDestruct(pBlock *pb)
7610 /*-----------------------------------------------------------------*/
7611 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
7612 /* name dbName and combine them */
7613 /* into one block */
7614 /*-----------------------------------------------------------------*/
7615 static void mergepBlocks(char dbName)
7618 pBlock *pb, *pbmerged = NULL,*pbn;
7620 pb = the_pFile->pbHead;
7622 //fprintf(stderr," merging blocks named %c\n",dbName);
7626 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
7627 if( getpBlock_dbName(pb) == dbName) {
7629 //fprintf(stderr," merged block %c\n",dbName);
7634 pic16_addpCode2pBlock(pbmerged, pb->pcHead);
7635 /* pic16_addpCode2pBlock doesn't handle the tail: */
7636 pbmerged->pcTail = pb->pcTail;
7638 pb->prev->next = pbn;
7640 pbn->prev = pb->prev;
7645 //pic16_printpBlock(stderr, pbmerged);
7652 /*-----------------------------------------------------------------*/
7653 /* AnalyzeFlow - Examine the flow of the code and optimize */
7655 /* level 0 == minimal optimization */
7656 /* optimize registers that are used only by two instructions */
7657 /* level 1 == maximal optimization */
7658 /* optimize by looking at pairs of instructions that use the */
7660 /*-----------------------------------------------------------------*/
7662 static void AnalyzeFlow(int level)
7664 static int times_called=0;
7668 /* remove unused allocated registers before exiting */
7669 pic16_RemoveUnusedRegisters();
7674 /* if this is not the first time this function has been called,
7675 * then clean up old flow information */
7676 if(times_called++) {
7677 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7679 pic16_RegsUnMapLiveRanges();
7683 /* Phase 2 - Flow Analysis - Register Banking
7685 * In this phase, the individual flow blocks are examined
7686 * and register banking is fixed.
7690 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7691 pic16_FixRegisterBanking(pb);
7694 /* Phase 2 - Flow Analysis
7696 * In this phase, the pCode is partition into pCodeFlow
7697 * blocks. The flow blocks mark the points where a continuous
7698 * stream of instructions changes flow (e.g. because of
7699 * a call or goto or whatever).
7702 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7703 pic16_BuildFlow(pb);
7706 /* Phase 2 - Flow Analysis - linking flow blocks
7708 * In this phase, the individual flow blocks are examined
7709 * to determine their order of excution.
7712 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7716 if (pic16_options.opt_flags & OF_OPTIMIZE_DF) {
7717 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7718 pic16_createDF (pb);
7719 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
7720 pic16_vcg_dump_default (pb);
7722 //pic16_destructDF (pb);
7726 if (0) releaseStack (); // releasing is costly...
7730 /* Phase 3 - Flow Analysis - Flow Tree
7732 * In this phase, the individual flow blocks are examined
7733 * to determine their order of execution.
7736 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7737 pic16_BuildFlowTree(pb);
7740 /* Phase x - Flow Analysis - Used Banks
7742 * In this phase, the individual flow blocks are examined
7743 * to determine the Register Banks they use
7747 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7752 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7753 pic16_pCodeRegMapLiveRanges(pb);
7755 pic16_RemoveUnusedRegisters();
7756 pic16_removeUnusedRegistersDF ();
7758 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
7759 pic16_pCodeRegOptimizeRegUsage(level);
7768 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7773 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7776 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7777 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7778 pcflow = pcflow->next) {
7779 FillFlow(PCFL(pcflow));
7784 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7787 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7788 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7789 pcflow = pcflow->next) {
7790 FlowStats(PCFL(pcflow));
7796 /* VR -- no need to analyze banking in flow, but left here :
7797 * 1. because it may be used in the future for other purposes
7798 * 2. because if omitted we'll miss some optimization done here
7800 * Perhaps I should rename it to something else
7803 /*-----------------------------------------------------------------*/
7804 /* pic16_AnalyzeBanking - Called after the memory addresses have been */
7805 /* assigned to the registers. */
7807 /*-----------------------------------------------------------------*/
7809 void pic16_AnalyzeBanking(void)
7813 /* Phase x - Flow Analysis - Used Banks
7815 * In this phase, the individual flow blocks are examined
7816 * to determine the Register Banks they use
7826 if(!the_pFile)return;
7828 if(!pic16_options.no_banksel) {
7829 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7830 // fprintf(stderr, "%s:%d: Fix register banking in pb= 0x%p\n", __FILE__, __LINE__, pb);
7831 pic16_FixRegisterBanking(pb);
7836 /*-----------------------------------------------------------------*/
7837 /* buildCallTree - Look at the flow and extract all of the calls. */
7838 /*-----------------------------------------------------------------*/
7839 static set *register_usage(pBlock *pb);
7841 static void buildCallTree(void )
7853 /* Now build the call tree.
7854 First we examine all of the pCodes for functions.
7855 Keep in mind that the function boundaries coincide
7856 with pBlock boundaries.
7858 The algorithm goes something like this:
7859 We have two nested loops. The outer loop iterates
7860 through all of the pBlocks/functions. The inner
7861 loop iterates through all of the pCodes for
7862 a given pBlock. When we begin iterating through
7863 a pBlock, the variable pc_fstart, pCode of the start
7864 of a function, is cleared. We then search for pCodes
7865 of type PC_FUNCTION. When one is encountered, we
7866 initialize pc_fstart to this and at the same time
7867 associate a new pBranch object that signifies a
7868 branch entry. If a return is found, then this signifies
7869 a function exit point. We'll link the pCodes of these
7870 returns to the matching pc_fstart.
7872 When we're done, a doubly linked list of pBranches
7873 will exist. The head of this list is stored in
7874 `the_pFile', which is the meta structure for all
7875 of the pCode. Look at the pic16_printCallTree function
7876 on how the pBranches are linked together.
7879 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7880 pCode *pc_fstart=NULL;
7881 for(pc = pb->pcHead; pc; pc = pc->next) {
7883 if(isPCI(pc) && pc_fstart) {
7884 if(PCI(pc)->is2MemOp) {
7885 r = pic16_getRegFromInstruction2(pc);
7886 if(r && !strcmp(r->name, "POSTDEC1"))
7887 PCF(pc_fstart)->stackusage++;
7889 r = pic16_getRegFromInstruction(pc);
7890 if(r && !strcmp(r->name, "PREINC1"))
7891 PCF(pc_fstart)->stackusage--;
7896 if (PCF(pc)->fname) {
7899 sprintf(buf, "%smain", port->fun_prefix);
7900 if(STRCASECMP(PCF(pc)->fname, buf) == 0) {
7901 //fprintf(stderr," found main \n");
7902 pb->cmemmap = NULL; /* FIXME do we need to free ? */
7906 pbr = Safe_calloc(1,sizeof(pBranch));
7907 pbr->pc = pc_fstart = pc;
7910 the_pFile->functions = pic16_pBranchAppend(the_pFile->functions,pbr);
7912 // Here's a better way of doing the same:
7913 addSet(&pb->function_entries, pc);
7916 // Found an exit point in a function, e.g. return
7917 // (Note, there may be more than one return per function)
7919 pBranchLink(PCF(pc_fstart), PCF(pc));
7921 addSet(&pb->function_exits, pc);
7923 } else if(isCALL(pc)) {
7924 addSet(&pb->function_calls,pc);
7931 /* This is not needed because currently all register used
7932 * by a function are stored in stack -- VR */
7934 /* Re-allocate the registers so that there are no collisions
7935 * between local variables when one function call another */
7938 // pic16_deallocateAllRegs();
7940 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7948 /*-----------------------------------------------------------------*/
7949 /* pic16_AnalyzepCode - parse the pCode that has been generated and form */
7950 /* all of the logical connections. */
7952 /* Essentially what's done here is that the pCode flow is */
7954 /*-----------------------------------------------------------------*/
7956 void pic16_AnalyzepCode(char dbName)
7967 /* Phase 1 - Register allocation and peep hole optimization
7969 * The first part of the analysis is to determine the registers
7970 * that are used in the pCode. Once that is done, the peep rules
7971 * are applied to the code. We continue to loop until no more
7972 * peep rule optimizations are found (or until we exceed the
7973 * MAX_PASSES threshold).
7975 * When done, the required registers will be determined.
7981 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
7982 //fprintf(stderr," Analyzing pCode: PASS #%d\n",i+1);
7984 /* First, merge the labels with the instructions */
7985 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7986 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
7988 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
7989 //fprintf(stderr," analyze and merging block %c\n",dbName);
7990 pic16_pBlockMergeLabels(pb);
7993 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName));
7998 changes = OptimizepCode(dbName);
8001 } while(changes && (i++ < MAX_PASSES));
8008 /* convert a series of movff's of local regs to stack, with a single call to
8009 * a support functions which does the same thing via loop */
8010 static void pic16_convertLocalRegs2Support(pCode *pcstart, pCode *pcend, int count, regs *r, int entry)
8014 char *fname[]={"__lr_store", "__lr_restore"};
8016 // pc = pic16_newpCode(POC_CALL, pic16_popGetFromString( (entry?fname[0]:fname[1]) ));
8018 pct = pic16_findNextInstruction(pcstart->next);
8021 pct = pc->next; //pic16_findNextInstruction(pc->next);
8022 // pc->print(stderr, pc);
8023 if(isPCI(pc) && PCI(pc)->label) {
8024 pbr = PCI(pc)->label;
8025 while(pbr && pbr->pc) {
8026 PCI(pcstart)->label = pic16_pBranchAppend(PCI(pcstart)->label, pbr);
8030 // pc->print(stderr, pc);
8032 pc->prev->next = pct;
8033 pct->prev = pc->prev;
8037 } while ((pc) && (pc != pcend));
8039 /* unlink movff instructions */
8040 pcstart->next = pcend;
8041 pcend->prev = pcstart;
8045 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8046 // pic16_popCopyReg(&pic16_pc_fsr0l), pic16_popCopyReg(pic16_framepnt_lo)))); pc = pct;
8049 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_LFSR, pic16_popGetLit2(0, pic16_popGetWithString(r->name)))); pc = pct;
8050 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_MOVLW, pic16_popGetLit( count ))); pc = pct;
8051 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_CALL, pic16_popGetWithString( fname[ (entry==1?0:1) ] ))); pc = pct;
8054 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8055 // pic16_popCopyReg(pic16_framepnt_lo), pic16_popCopyReg(&pic16_pc_fsr0l)))); pc = pct;
8062 sym = newSymbol( fname[ entry?0:1 ], 0 );
8063 strcpy(sym->rname, fname[ entry?0:1 ]);
8064 checkAddSym(&externs, sym);
8066 // fprintf(stderr, "%s:%d adding extern symbol %s in externs\n", __FILE__, __LINE__, fname[ entry?0:1 ]);
8071 /*-----------------------------------------------------------------*/
8072 /* OptimizeLocalRegs - turn sequence of MOVFF instructions for */
8073 /* local registers to a support function call */
8074 /*-----------------------------------------------------------------*/
8075 void pic16_OptimizeLocalRegs(void)
8080 pCodeOpLocalReg *pclr;
8083 regs *r, *lastr=NULL, *firstr=NULL;
8084 pCode *pcstart=NULL, *pcend=NULL;
8089 * local_regs begin mark
8090 * MOVFF r0x01, POSTDEC1
8091 * MOVFF r0x02, POSTDEC1
8094 * MOVFF r0x0n, POSTDEC1
8095 * local_regs end mark
8097 * convert the above to the below:
8098 * MOVLW starting_register_index
8100 * MOVLW register_count
8101 * call __save_registers_in_stack
8107 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8108 inRegCount = regCount = 0;
8109 firstr = lastr = NULL;
8110 for(pc = pb->pcHead; pc; pc = pc->next) {
8112 /* hold current function name */
8113 if(pc && isPCF(pc))curFunc = PCF(pc)->fname;
8115 if(pc && (pc->type == PC_INFO)) {
8118 if(pci->type == INF_LOCALREGS) {
8119 pclr = PCOLR(pci->oper1);
8121 if((pclr->type == LR_ENTRY_BEGIN)
8122 || (pclr->type == LR_ENTRY_END))inEntry = 1;
8125 switch(pclr->type) {
8126 case LR_ENTRY_BEGIN:
8128 inRegCount = 1; regCount = 0;
8129 pcstart = pc; //pic16_findNextInstruction(pc->next);
8130 firstr = lastr = NULL;
8136 pcend = pc; //pic16_findPrevInstruction(pc->prev);
8139 if(curFunc && inWparamList(curFunc+1)) {
8140 fprintf(stderr, "sdcc: %s: warning: disabling lr-support for functionn %s\n",
8144 pic16_convertLocalRegs2Support(pcstart, pcend, regCount,
8149 firstr = lastr = NULL;
8153 if(inRegCount == -1) {
8154 // fprintf(stderr, "%s:%d registers used [%s] %d\n", __FILE__, __LINE__, inEntry?"entry":"exit", regCount);
8160 if(isPCI(pc) && (PCI(pc)->op == POC_MOVFF) && (inRegCount == 1)) {
8162 r = pic16_getRegFromInstruction(pc);
8164 r = pic16_getRegFromInstruction2(pc);
8165 if(r && (r->type == REG_GPR) && (r->pc_type == PO_GPR_TEMP)) {
8166 if(!firstr)firstr = r;
8168 // fprintf(stderr, "%s:%d\t%s\t%i\t%d/%d\n", __FILE__, __LINE__, r->name, r->rIdx);
8180 /*-----------------------------------------------------------------*/
8181 /* ispCodeFunction - returns true if *pc is the pCode of a */
8183 /*-----------------------------------------------------------------*/
8184 static bool ispCodeFunction(pCode *pc)
8187 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
8193 /*-----------------------------------------------------------------*/
8194 /* findFunction - Search for a function by name (given the name) */
8195 /* in the set of all functions that are in a pBlock */
8196 /* (note - I expect this to change because I'm planning to limit */
8197 /* pBlock's to just one function declaration */
8198 /*-----------------------------------------------------------------*/
8199 static pCode *findFunction(char *fname)
8206 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8208 pc = setFirstItem(pb->function_entries);
8211 if((pc->type == PC_FUNCTION) &&
8213 (strcmp(fname, PCF(pc)->fname)==0))
8216 pc = setNextItem(pb->function_entries);
8224 static void MarkUsedRegisters(set *regset)
8229 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
8230 // fprintf(stderr, "marking register = %s\t", r1->name);
8231 r2 = pic16_regWithIdx(r1->rIdx);
8232 // fprintf(stderr, "to register = %s\n", r2->name);
8238 static void pBlockStats(FILE *of, pBlock *pb)
8244 if(!pic16_pcode_verbose)return;
8246 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
8248 // for now just print the first element of each set
8249 pc = setFirstItem(pb->function_entries);
8251 fprintf(of,";entry: ");
8254 pc = setFirstItem(pb->function_exits);
8256 fprintf(of,";has an exit\n");
8260 pc = setFirstItem(pb->function_calls);
8262 fprintf(of,";functions called:\n");
8265 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8266 fprintf(of,"; %s\n",pic16_get_op_from_instruction(PCI(pc)));
8268 pc = setNextItem(pb->function_calls);
8272 r = setFirstItem(pb->tregisters);
8274 int n = elementsInSet(pb->tregisters);
8276 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
8279 fprintf(of, "; %s\n",r->name);
8280 r = setNextItem(pb->tregisters);
8284 fprintf(of, "; uses %d bytes of stack\n", 1+ elementsInSet(pb->tregisters));
8287 /*-----------------------------------------------------------------*/
8288 /*-----------------------------------------------------------------*/
8290 static void sequencepCode(void)
8296 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8298 pb->seq = GpCodeSequenceNumber+1;
8300 for( pc = pb->pcHead; pc; pc = pc->next)
8301 pc->seq = ++GpCodeSequenceNumber;
8307 /*-----------------------------------------------------------------*/
8308 /*-----------------------------------------------------------------*/
8309 static set *register_usage(pBlock *pb)
8312 set *registers=NULL;
8313 set *registersInCallPath = NULL;
8315 /* check recursion */
8317 pc = setFirstItem(pb->function_entries);
8324 if(pc->type != PC_FUNCTION)
8325 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
8327 pc = setFirstItem(pb->function_calls);
8328 for( ; pc; pc = setNextItem(pb->function_calls)) {
8330 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8331 char *dest = pic16_get_op_from_instruction(PCI(pc));
8333 pcn = findFunction(dest);
8335 registersInCallPath = register_usage(pcn->pb);
8337 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8342 pBlockStats(stderr,pb); // debug
8345 // Mark the registers in this block as used.
8347 MarkUsedRegisters(pb->tregisters);
8348 if(registersInCallPath) {
8349 /* registers were used in the functions this pBlock has called */
8350 /* so now, we need to see if these collide with the ones we are */
8353 regs *r1,*r2, *newreg;
8355 DFPRINTF((stderr,"comparing registers\n"));
8357 r1 = setFirstItem(registersInCallPath);
8360 r2 = setFirstItem(pb->tregisters);
8362 while(r2 && (r1->type != REG_STK)) {
8364 if(r2->rIdx == r1->rIdx) {
8365 newreg = pic16_findFreeReg(REG_GPR);
8369 DFPRINTF((stderr,"Bummer, no more registers.\n"));
8373 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
8374 r1->rIdx, newreg->rIdx));
8375 r2->rIdx = newreg->rIdx;
8376 //if(r2->name) Safe_free(r2->name);
8378 r2->name = Safe_strdup(newreg->name);
8382 newreg->wasUsed = 1;
8384 r2 = setNextItem(pb->tregisters);
8387 r1 = setNextItem(registersInCallPath);
8390 /* Collisions have been resolved. Now free the registers in the call path */
8391 r1 = setFirstItem(registersInCallPath);
8393 if(r1->type != REG_STK) {
8394 newreg = pic16_regWithIdx(r1->rIdx);
8397 r1 = setNextItem(registersInCallPath);
8401 // MarkUsedRegisters(pb->registers);
8403 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
8406 DFPRINTF((stderr,"returning regs\n"));
8408 DFPRINTF((stderr,"not returning regs\n"));
8410 DFPRINTF((stderr,"pBlock after register optim.\n"));
8411 pBlockStats(stderr,pb); // debug
8417 /*-----------------------------------------------------------------*/
8418 /* pct2 - writes the call tree to a file */
8420 /*-----------------------------------------------------------------*/
8421 static void pct2(FILE *of,pBlock *pb,int indent,int usedstack)
8425 // set *registersInCallPath = NULL;
8431 fprintf(of, "recursive function\n");
8432 return; //recursion ?
8435 pc = setFirstItem(pb->function_entries);
8442 for(i=0;i<indent;i++) // Indentation
8446 if(pc->type == PC_FUNCTION) {
8447 usedstack += PCF(pc)->stackusage;
8448 fprintf(of,"%s (stack: %i)\n",PCF(pc)->fname, usedstack);
8449 } else return; // ???
8452 pc = setFirstItem(pb->function_calls);
8453 for( ; pc; pc = setNextItem(pb->function_calls)) {
8455 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8456 char *dest = pic16_get_op_from_instruction(PCI(pc));
8458 pcn = findFunction(dest);
8460 pct2(of,pcn->pb,indent+1, usedstack); // + PCF(pcn)->stackusage);
8462 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8470 /*-----------------------------------------------------------------*/
8471 /* pic16_printCallTree - writes the call tree to a file */
8473 /*-----------------------------------------------------------------*/
8475 void pic16_printCallTree(FILE *of)
8487 fprintf(of, "\npBlock statistics\n");
8488 for(pb = the_pFile->pbHead; pb; pb = pb->next )
8492 fprintf(of,"Call Tree\n");
8493 pbr = the_pFile->functions;
8497 if(!ispCodeFunction(pc))
8498 fprintf(of,"bug in call tree");
8501 fprintf(of,"Function: %s\n", PCF(pc)->fname);
8503 while(pc->next && !ispCodeFunction(pc->next)) {
8505 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
8506 fprintf(of,"\t%s\n",pic16_get_op_from_instruction(PCI(pc)));
8514 fprintf(of,"\n**************\n\na better call tree\n");
8515 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8520 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8521 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
8527 /*-----------------------------------------------------------------*/
8529 /*-----------------------------------------------------------------*/
8531 static void InlineFunction(pBlock *pb)
8539 pc = setFirstItem(pb->function_calls);
8541 for( ; pc; pc = setNextItem(pb->function_calls)) {
8544 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8550 if(pcn && isPCF(pcn) && (PCF(pcn)->ncalled == 0)) { /* change 0 to 1 to enable inlining */
8552 //fprintf(stderr,"Cool can inline:\n");
8553 //pcn->print(stderr,pcn);
8555 //fprintf(stderr,"recursive call Inline\n");
8556 InlineFunction(pcn->pb);
8557 //fprintf(stderr,"return from recursive call Inline\n");
8560 At this point, *pc points to a CALL mnemonic, and
8561 *pcn points to the function that is being called.
8563 To in-line this call, we need to remove the CALL
8564 and RETURN(s), and link the function pCode in with
8570 /* Remove the CALL */
8574 /* remove callee pBlock from the pBlock linked list */
8575 removepBlock(pcn->pb);
8583 /* Remove the Function pCode */
8584 pct = pic16_findNextInstruction(pcn->next);
8586 /* Link the function with the callee */
8587 pc->next = pcn->next;
8588 pcn->next->prev = pc;
8590 /* Convert the function name into a label */
8592 pbr = Safe_calloc(1,sizeof(pBranch));
8593 pbr->pc = pic16_newpCodeLabel(PCF(pcn)->fname, -1);
8595 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,pbr);
8596 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
8598 /* turn all of the return's except the last into goto's */
8599 /* check case for 2 instruction pBlocks */
8600 pce = pic16_findNextInstruction(pcn->next);
8602 pCode *pce_next = pic16_findNextInstruction(pce->next);
8604 if(pce_next == NULL) {
8605 /* found the last return */
8606 pCode *pc_call_next = pic16_findNextInstruction(pc_call->next);
8608 //fprintf(stderr,"found last return\n");
8609 //pce->print(stderr,pce);
8610 pce->prev->next = pc_call->next;
8611 pc_call->next->prev = pce->prev;
8612 PCI(pc_call_next)->label = pic16_pBranchAppend(PCI(pc_call_next)->label,
8622 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8628 /*-----------------------------------------------------------------*/
8630 /*-----------------------------------------------------------------*/
8632 void pic16_InlinepCode(void)
8641 if(!functionInlining)
8644 /* Loop through all of the function definitions and count the
8645 * number of times each one is called */
8646 //fprintf(stderr,"inlining %d\n",__LINE__);
8648 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8650 pc = setFirstItem(pb->function_calls);
8652 for( ; pc; pc = setNextItem(pb->function_calls)) {
8655 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8656 if(pcn && isPCF(pcn)) {
8657 PCF(pcn)->ncalled++;
8660 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8665 //fprintf(stderr,"inlining %d\n",__LINE__);
8667 /* Now, Loop through the function definitions again, but this
8668 * time inline those functions that have only been called once. */
8670 InlineFunction(the_pFile->pbHead);
8671 //fprintf(stderr,"inlining %d\n",__LINE__);
8673 for(pb = the_pFile->pbHead; pb; pb = pb->next)
8678 char *pic_optype_names[]={
8679 "PO_NONE", // No operand e.g. NOP
8680 "PO_W", // The working register (as a destination)
8681 "PO_WREG", // The working register (as a file register)
8682 "PO_STATUS", // The 'STATUS' register
8683 "PO_BSR", // The 'BSR' register
8684 "PO_FSR0", // The "file select register" (in PIC18 family it's one
8686 "PO_INDF0", // The Indirect register
8687 "PO_INTCON", // Interrupt Control register
8688 "PO_GPR_REGISTER", // A general purpose register
8689 "PO_GPR_BIT", // A bit of a general purpose register
8690 "PO_GPR_TEMP", // A general purpose temporary register
8691 "PO_SFR_REGISTER", // A special function register (e.g. PORTA)
8692 "PO_PCL", // Program counter Low register
8693 "PO_PCLATH", // Program counter Latch high register
8694 "PO_PCLATU", // Program counter Latch upper register
8695 "PO_PRODL", // Product Register Low
8696 "PO_PRODH", // Product Register High
8697 "PO_LITERAL", // A constant
8698 "PO_REL_ADDR", // A relative address
8699 "PO_IMMEDIATE", // (8051 legacy)
8700 "PO_DIR", // Direct memory (8051 legacy)
8701 "PO_CRY", // bit memory (8051 legacy)
8702 "PO_BIT", // bit operand.
8703 "PO_STR", // (8051 legacy)
8705 "PO_WILD" // Wild card operand in peep optimizer
8709 char *dumpPicOptype(PIC_OPTYPE type)
8711 return (pic_optype_names[ type ]);
8715 /*** BEGIN of stuff belonging to the BANKSEL optimization ***/
8718 #define MAX_COMMON_BANK_SIZE 32
8719 #define FIRST_PSEUDO_BANK_NR 1000
8721 hTab *sym2bank = NULL; // <OPERAND NAME> --> <PSEUDO BANK NR>
8722 hTab *bank2sym = NULL; // <PSEUDO BANK NR> --> <OPERAND NAME>
8723 hTab *coerce = NULL; // <PSEUDO BANK NR> --> <&PSEUDOBANK>
8726 typedef enum { INVALID_BANK = -1, UNKNOWN_BANK = -2, FIXED_BANK = -3 } pseudoBankNr;
8729 pseudoBankNr bank; // number assigned to this pseudoBank
8730 unsigned int size; // number of operands assigned to this bank
8731 unsigned int ref; // number of symbols referring to this pseudoBank (for garbage collection)
8734 /*----------------------------------------------------------------------*/
8735 /* hashSymbol - hash function used to map SYMBOLs (or operands) to ints */
8736 /*----------------------------------------------------------------------*/
8737 unsigned int hashSymbol (const char *str)
8739 unsigned int res = 0;
8744 res = (res << 4) | (res >> (8 * sizeof(unsigned int) - 4));
8751 /*-----------------------------------------------------------------------*/
8752 /* compareSymbol - return 1 iff sym1 equals sym2 */
8753 /*-----------------------------------------------------------------------*/
8754 int compareSymbol (const void *sym1, const void *sym2)
8756 char *s1 = (char*) sym1;
8757 char *s2 = (char*) sym2;
8759 return (strcmp (s1,s2) == 0);
8762 /*-----------------------------------------------------------------------*/
8763 /* comparePre - return 1 iff p1 == p2 */
8764 /*-----------------------------------------------------------------------*/
8765 int comparePtr (const void *p1, const void *p2)
8770 /*----------------------------------------------------------*/
8771 /* getSymbolFromOperand - return a pointer to the symbol in */
8772 /* the given operand and its length */
8773 /*----------------------------------------------------------*/
8774 char *getSymbolFromOperand (char *op, unsigned int *len)
8779 if (!op) return NULL;
8781 // we recognize two forms of operands: SYMBOL and (SYMBOL + offset)
8783 if (*sym == '(') sym++;
8786 while (((*curr >= 'A') && (*curr <= 'Z'))
8787 || ((*curr >= 'a') && (*curr <= 'z'))
8788 || ((curr != sym) && (*curr >= '0') && (*curr <= '9'))
8789 || (*curr == '_')) {
8790 // find end of symbol [A-Za-z_]?[A-Za-z0-9]*
8798 /*--------------------------------------------------------------------------*/
8799 /* getSymFromBank - get (one) name of a symbol assigned to the given bank */
8800 /*--------------------------------------------------------------------------*/
8801 char *getSymFromBank (pseudoBankNr bank)
8805 if (bank < 0) return "<INVALID BANK NR>";
8806 return hTabFindByKey (bank2sym, bank % bank2sym->size, (void *) bank, &comparePtr);
8809 /*-----------------------------------------------------------------------*/
8810 /* getPseudoBsrFromOperand - maps a string to its corresponding pseudo */
8811 /* bank number (uses hTab sym2bank), if the */
8812 /* symbol is not yet assigned a pseudo bank it */
8813 /* is assigned one here */
8814 /*-----------------------------------------------------------------------*/
8815 pseudoBankNr getPseudoBankNrFromOperand (const char *op)
8817 static pseudoBankNr next_bank = FIRST_PSEUDO_BANK_NR;
8823 hash = hashSymbol (op) % sym2bank->size;
8824 bank = (pseudoBankNr) hTabFindByKey (sym2bank, hash, op, &compareSymbol);
8825 if (bank == (pseudoBankNr)NULL) bank = UNKNOWN_BANK;
8827 if (bank == UNKNOWN_BANK) {
8828 // create a pseudo bank for the operand
8830 hTabAddItemLong (&sym2bank, hash, (char *)op, (void *)bank);
8831 hTabAddItemLong (&bank2sym, bank, (void *) bank, (void *)op);
8832 getOrAddGNode (adj, NULL, bank); // adds the node if it does not exist yet
8833 //fprintf (stderr, "%s:%d: adding %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8835 //fprintf (stderr, "%s:%d: found %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8843 /*--------------------------------------------------------------------*/
8844 /* isBanksel - check whether the given pCode is a BANKSEL instruction */
8845 /*--------------------------------------------------------------------*/
8846 int isBanksel (pCode *pc)
8850 if (isPCI(pc) && (PCI(pc)->op == POC_BANKSEL || PCI(pc)->op == POC_MOVLB)) {
8851 // BANKSEL <variablename> or MOVLB <banknr>
8852 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8856 // check for inline assembler BANKSELs
8857 if (isPCAD(pc) && PCAD(pc)->directive && (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0 ||
8858 STRCASECMP(PCAD(pc)->directive,"MOVLB") == 0)) {
8859 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8863 // assume pc is no BANKSEL instruction
8867 /*---------------------------------------------------------------------------------*/
8868 /* invalidatesBSR - check whether the pCodeInstruction passed in modifies the BSR */
8869 /* This method can not guarantee to find all modifications of the */
8870 /* BSR (e.g. via INDirection registers) but covers all compiler */
8871 /* generated plus some cases. */
8872 /*---------------------------------------------------------------------------------*/
8873 int invalidatesBSR(pCode *pc)
8875 // assembler directives invalidate BSR (well, they might, we don't know)
8876 if (isPCAD(pc)) return 1;
8878 // only ASMDIRs and pCodeInstructions can invalidate BSR
8879 if (!isPCI(pc)) return 0;
8881 // we have a pCodeInstruction
8883 // check for BSR modifying instructions
8884 switch (PCI(pc)->op) {
8888 case POC_RETFIE: // might be used as CALL replacement
8889 case POC_RETLW: // might be used as CALL replacement
8890 case POC_RETURN: // might be used as CALL replacement
8895 default: // other instruction do not change BSR unless BSR is an explicit operand!
8896 // TODO: check for BSR as an explicit operand (e.g. INCF BSR,F), which should be rather unlikely...!
8900 // no change of BSR possible/probable
8904 /*------------------------------------------------------------*/
8905 /* getBankFromBanksel - return the pseudo bank nr assigned to */
8906 /* the symbol referenced in this BANKSEL */
8907 /*------------------------------------------------------------*/
8908 pseudoBankNr getBankFromBanksel (pCode *pc)
8911 int data = (int)NULL;
8913 if (!pc) return INVALID_BANK;
8915 if (isPCAD(pc) && PCAD(pc)->directive) {
8916 if (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0) {
8917 // get symbolname from PCAD(pc)->arg
8918 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8919 sym = PCAD(pc)->arg;
8920 data = getPseudoBankNrFromOperand (sym);
8921 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8922 } else if (STRCASECMP(PCAD(pc)->directive,"MOVLB")) {
8923 // get (literal) bank number from PCAD(pc)->arg
8924 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8925 assert (0 && "not yet implemented - turn off banksel optimization for now");
8927 } else if (isPCI(pc)) {
8928 if (PCI(pc)->op == POC_BANKSEL) {
8929 // get symbolname from PCI(pc)->pcop->name (?)
8930 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8931 sym = PCI(pc)->pcop->name;
8932 data = getPseudoBankNrFromOperand (sym);
8933 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8934 } else if (PCI(pc)->op == POC_MOVLB) {
8935 // get (literal) bank number from PCI(pc)->pcop->name
8936 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8937 assert (0 && "not yet implemented - turn off banksel optimization for now");
8942 // no assigned bank could be found
8943 return UNKNOWN_BANK;
8948 /*------------------------------------------------------------------------------*/
8949 /* getEffectiveBank - resolves the currently assigned effective pseudo bank nr */
8950 /*------------------------------------------------------------------------------*/
8951 pseudoBankNr getEffectiveBank (pseudoBankNr bank)
8955 if (bank < FIRST_PSEUDO_BANK_NR) return bank;
8958 //fprintf (stderr, "%s:%d: bank=%d\n", __FUNCTION__, __LINE__, bank);
8959 data = (pseudoBank *) hTabFindByKey (coerce, bank % coerce->size, (void *) bank, &comparePtr);
8961 if (data->bank != bank)
8968 //fprintf (stderr, "%s:%d: effective bank=%d\n", __FUNCTION__, __LINE__, bank);
8972 /*------------------------------------------------------------------*/
8973 /* attachBsrInfo2pBlock - create a look-up table as to which pseudo */
8974 /* bank is selected at a given pCode */
8975 /*------------------------------------------------------------------*/
8977 /* Create a graph with pseudo banks as its nodes and switches between
8978 * these as edges (with the edge weight representing the absolute
8979 * number of BANKSELs from one to the other).
8980 * Removes redundand BANKSELs instead iff mod == 1.
8981 * BANKSELs update the pseudo BSR, labels invalidate the current BSR
8982 * value (setting it to 0=UNNKOWN), (R)CALLs also invalidate the
8984 * TODO: check ALL instructions operands if they modify BSR directly...
8986 * pb - the pBlock to annotate
8987 * mod - select either graph creation (0) or BANKSEL removal (1)
8989 unsigned int attachBsrInfo2pBlock (pBlock *pb, int mod)
8991 pCode *pc, *pc_next;
8992 unsigned int prevBSR = UNKNOWN_BANK, pseudoBSR = UNKNOWN_BANK;
8993 int isBankselect = 0;
8994 unsigned int banksels=0;
8998 pc = pic16_findNextInstruction(pb->pcHead);
9000 isBankselect = isBanksel (pc);
9001 pc_next = pic16_findNextInstruction (pc->next);
9003 if (!hasNoLabel (pc)) {
9004 // we don't know our predecessors -- assume different BSRs
9005 prevBSR = UNKNOWN_BANK;
9006 pseudoBSR = UNKNOWN_BANK;
9007 //fprintf (stderr, "invalidated by label at "); pc->print (stderr, pc);
9010 // check if this is a BANKSEL instruction
9012 pseudoBSR = getEffectiveBank (getBankFromBanksel(pc));
9013 //fprintf (stderr, "BANKSEL via "); pc->print (stderr, pc);
9015 if (prevBSR == pseudoBSR && pseudoBSR >= 0) {
9016 //fprintf (stderr, "removing redundant "); pc->print (stderr, pc);
9017 if (1 || pic16_pcode_verbose) pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("removed redundant BANKSEL"));
9018 pic16_unlinkpCode (pc);
9022 addGEdge2 (getOrAddGNode (adj, NULL, prevBSR), getOrAddGNode (adj, NULL, pseudoBSR), 1, 0);
9027 if (!isBankselect && invalidatesBSR(pc)) {
9028 // check if this instruction invalidates the pseudoBSR
9029 pseudoBSR = UNKNOWN_BANK;
9030 //fprintf (stderr, "invalidated via "); pc->print (stderr, pc);
9033 prevBSR = pseudoBSR;
9040 /*------------------------------------------------------------------------------------*/
9041 /* assignToSameBank - returns 0 on success or an error code */
9042 /* 1 - common bank would be too large */
9043 /* 2 - assignment to fixed (absolute) bank not performed */
9045 /* This functions assumes that unsplittable operands are already assigned to the same */
9046 /* bank (e.g. all objects being referenced as (SYMBOL + offset) must be in the same */
9047 /* bank so that we can make sure the bytes are laid out sequentially in memory) */
9048 /* TODO: Symbols with an abslute address must be handled specially! */
9049 /*------------------------------------------------------------------------------------*/
9050 int assignToSameBank (int bank0, int bank1, int doAbs)
9052 int eff0, eff1, dummy;
9053 pseudoBank *pbank0, *pbank1;
9056 eff0 = getEffectiveBank (bank0);
9057 eff1 = getEffectiveBank (bank1);
9059 //fprintf (stderr, "%s:%d: bank0=%d/%d, bank1=%d/%d, doAbs=%d\n", __FUNCTION__, __LINE__, bank0, eff0, bank1, eff1, doAbs);
9061 // nothing to do if already same bank
9062 if (eff0 == eff1) return 0;
9064 if (!doAbs && (eff0 < FIRST_PSEUDO_BANK_NR || eff1 < FIRST_PSEUDO_BANK_NR))
9067 // ensure eff0 < eff1
9069 // swap eff0 and eff1
9078 // now assign bank eff1 to bank eff0
9079 pbank0 = (pseudoBank *) hTabFindByKey (coerce, eff0 % coerce->size, (void *)((char*)0+eff0), &comparePtr);
9081 pbank0 = Safe_calloc (1, sizeof (pseudoBank));
9082 pbank0->bank = eff0;
9085 hTabAddItemLong (&coerce, eff0 % coerce->size, (void *)((char*)0+eff0), (void *) pbank0);
9089 hitem = hTabSearch (coerce, eff1 % coerce->size);
9090 while (hitem && hitem->pkey != (void *)((char*)0+eff1))
9091 hitem = hitem->next;
9093 if (hitem) pbank1 = (pseudoBank *) hitem->item;
9096 fprintf (stderr, "bank #%d/%d & bank #%d/%d --> bank #%d: %u (%s & %s)\n", bank0, eff0, bank1, eff1,
9097 pbank0->bank, pbank0->size,
9098 getSymFromBank (eff0), getSymFromBank (eff1));
9102 if (pbank0->size + pbank1->size > MAX_COMMON_BANK_SIZE) {
9104 fprintf (stderr, "bank #%d: %u, bank #%d: %u --> bank #%d': %u > %u (%s,%s)\n",
9105 pbank0->bank, pbank0->size, pbank1->bank, pbank1->size,
9106 pbank0->bank, pbank0->size + pbank1->size, MAX_COMMON_BANK_SIZE,
9107 getSymFromBank (pbank0->bank), getSymFromBank (pbank1->bank));
9111 pbank0->size += pbank1->size;
9113 if (pbank1->ref == 0) Safe_free (pbank1);
9119 hitem->item = pbank0;
9121 hTabAddItemLong (&coerce, eff1 % coerce->size, (void *)((char*)0+eff1), (void *) pbank0);
9124 //fprintf (stderr, "%s:%d: leaving.\n", __FUNCTION__, __LINE__);
9129 /*----------------------------------------------------------------*/
9130 /* mergeGraphNodes - combines two nodes into one and modifies all */
9131 /* edges to and from the nodes accordingly */
9132 /* This method needs complete backedges, i.e. if (A,B) is an edge */
9133 /* then also (B,A) must be an edge (possibly with weight 0). */
9134 /*----------------------------------------------------------------*/
9135 void mergeGraphNodes (GraphNode *node1, GraphNode *node2)
9137 GraphEdge *edge, *backedge, *nextedge;
9141 assert (node1 && node2);
9142 assert (node1 != node2);
9144 // add all edges starting at node2 to node1
9147 nextedge = edge->next;
9149 backedge = getGEdge (node, node2);
9151 backweight = backedge->weight;
9154 // insert edges (node1,node) and (node,node1)
9155 addGEdge2 (node1, node, edge->weight, backweight);
9156 // remove edges (node, node2) and (node2, node)
9157 remGEdge (node2, node);
9158 remGEdge (node, node2);
9162 // now node2 should not be referenced by any other GraphNode...
9163 //remGNode (adj, node2->data, node2->hash);
9166 /*----------------------------------------------------------------*/
9167 /* showGraph - dump the current BANKSEL graph as a node/edge list */
9168 /*----------------------------------------------------------------*/
9169 void showGraph (Graph *g)
9173 pseudoBankNr bankNr;
9180 bankNr = getEffectiveBank (node->hash);
9181 assert (bankNr >= 0);
9182 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9184 bankNr = pbank->bank;
9190 fprintf (stderr, "edges from %s (bank %u, size %u) to:\n", getSymFromBank (node->hash), bankNr, size);
9193 if (edge->weight > 0)
9194 fprintf (stderr, " %4u x %s\n", edge->weight, getSymFromBank (edge->node->hash));
9201 /*---------------------------------------------------------------*/
9202 /* pic16_OptimizeBanksel - remove redundant BANKSEL instructions */
9203 /*---------------------------------------------------------------*/
9204 void pic16_OptimizeBanksel ()
9206 GraphNode *node, *node1, *node1next;
9209 // needed for more effective bank assignment (needs adjusted pic16_emit_usection())
9210 GraphEdge *edge, *backedge;
9212 int maxWeight, weight, mergeMore, absMaxWeight;
9213 pseudoBankNr curr0, curr1;
9216 pseudoBankNr bankNr;
9217 char *base_symbol0, *base_symbol1;
9222 unsigned int bankselsTotal = 0, bankselsRemoved = 0;
9224 //fprintf (stderr, "%s:%s:%d: entered.\n", __FILE__, __FUNCTION__, __LINE__);
9226 if (!the_pFile || !the_pFile->pbHead) return;
9228 adj = newGraph (NULL);
9229 sym2bank = newHashTable ( 255 );
9230 bank2sym = newHashTable ( 255 );
9231 coerce = newHashTable ( 255 );
9233 // create graph of BANKSEL relationships (node = operands, edge (A,B) iff BANKSEL B follows BANKSEL A)
9234 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9235 bankselsTotal += attachBsrInfo2pBlock (pb, 0);
9239 // assign symbols with absolute addresses to their respective bank nrs
9240 set = pic16_fix_udata;
9241 for (reg = setFirstItem (set); reg; reg = setNextItem (set)) {
9242 bankNr = reg->address >> 8;
9243 node = getOrAddGNode (adj, NULL, bankNr);
9244 bankNr = (pseudoBankNr) getEffectiveBank (getPseudoBankNrFromOperand(reg->name));
9245 assignToSameBank (node->hash, bankNr, 1);
9247 assert (bankNr >= 0);
9248 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9250 pbank = Safe_calloc (1, sizeof (pseudoBank));
9251 pbank->bank = reg->address >> 8; //FIXED_BANK;
9254 hTabAddItemLong (&coerce, bankNr % coerce->size, (void *) bankNr, pbank);
9256 assert (pbank->bank == (reg->address >> 8));
9257 pbank->bank = reg->address >> 8; //FIXED_BANK;
9259 //fprintf (stderr, "ABS: %s (%d bytes) at %x in bank %u\n", reg->name, reg->size, reg->address, bankNr);
9264 // assign operands referring to the same symbol (which is not given an absolute address) to the same bank
9265 //fprintf (stderr, "assign operands with the same symbol to the same bank\n");
9268 if (node->hash < 0) { node = node->next; continue; }
9269 base_symbol0 = getSymbolFromOperand (getSymFromBank (getEffectiveBank(node->hash)), &len0);
9272 if (node1->hash < 0) { node1 = node1->next; continue; }
9273 node1next = node1->next;
9274 base_symbol1 = getSymbolFromOperand (getSymFromBank (getEffectiveBank (node1->hash)), &len1);
9275 if (len0 == len1 && len0 > 0 && strncmp (base_symbol0, base_symbol1, len0) == 0) {
9276 // TODO: check for symbols with absolute addresses -- these might be placed across bank boundaries!
9277 //fprintf (stderr, "merging %s and %s\n", getSymFromBank (getEffectiveBank(node->hash)), getSymFromBank (getEffectiveBank(node1->hash)));
9278 if (assignToSameBank (node->hash, node1->hash, 0)) {
9279 fprintf (stderr, "%s(%d) == %s(%d)\n", base_symbol0, len0, base_symbol1, len1);
9280 assert (0 && "Could not assign a symbol to a bank!");
9282 mergeGraphNodes (node, node1);
9284 if (node->hash < node1->hash)
9285 mergeGraphNodes (node, node1);
9287 mergeGraphNodes (node1, node); // this removes node so node->next will fail...
9297 // >>> THIS ALSO NEEDS AN UPDATED pic16_emit_usection() TO REFLECT THE BANK ASSIGNMENTS <<<
9298 // assign tightly coupled operands to the same (pseudo) bank
9299 //fprintf (stderr, "assign tightly coupled operands to the same bank\n");
9307 curr0 = getEffectiveBank (node->hash);
9308 if (curr0 < 0) { node = node->next; continue; }
9311 assert (edge->src == node);
9312 backedge = getGEdge (edge->node, edge->src);
9313 weight = edge->weight + (backedge ? backedge->weight : 0);
9314 curr1 = getEffectiveBank (edge->node->hash);
9315 if (curr1 < 0) { edge = edge->next; continue; }
9317 // merging is only useful if the items are not assigned to the same bank already...
9318 if (curr0 != curr1 && weight > maxWeight) {
9319 if (maxWeight > absMaxWeight) absMaxWeight = maxWeight;
9328 if (maxWeight > 0) {
9330 fprintf (stderr, "%s:%d: merging (%4u) %d(%s) and %d(%s)\n", __FUNCTION__, __LINE__, maxWeight,
9331 max->src->hash, getSymFromBank (max->src->hash),
9332 max->node->hash, getSymFromBank (max->node->hash));
9335 node = getGNode (adj, max->src->data, max->src->hash);
9336 node1 = getGNode (adj, max->node->data, max->node->hash);
9338 if (0 == assignToSameBank (max->src->hash, max->node->hash, 0)) {
9339 if (max->src->hash < max->node->hash)
9340 mergeGraphNodes (node, node1);
9342 mergeGraphNodes (node1, node);
9344 remGEdge (node, node1);
9345 remGEdge (node1, node);
9356 // remove redundant BANKSELs
9357 //fprintf (stderr, "removing redundant BANKSELs\n");
9358 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9359 bankselsRemoved += attachBsrInfo2pBlock (pb, 1);
9364 fprintf (stderr, "display graph\n");
9369 //fprintf (stderr, "%s:%s:%d: leaving, %u/%u BANKSELs removed...\n", __FILE__, __FUNCTION__, __LINE__, bankselsRemoved, bankselsTotal);
9372 /*** END of stuff belonging to the BANKSEL optimization ***/
9376 /*** BEGIN of helpers for pCode dataflow optimizations ***/
9378 typedef unsigned int symbol_t;
9379 typedef unsigned int valnum_t;
9380 //typedef unsigned int hash_t;
9383 #define INT_TO_PTR(x) (((char *) 0) + (x))
9387 #define PTR_TO_INT(x) (((char *)(x)) - ((char *) 0))
9391 static unsigned int pic16_df_removed_pcodes = 0;
9392 static unsigned int pic16_df_saved_bytes = 0;
9393 static unsigned int df_findall_sameflow = 0;
9394 static unsigned int df_findall_otherflow = 0;
9395 static unsigned int df_findall_in_vals = 0;
9397 static void pic16_df_stats () {
9399 if (pic16_debug_verbose || pic16_pcode_verbose) {
9400 fprintf (stderr, "PIC16: dataflow analysis removed %u instructions (%u bytes)\n", pic16_df_removed_pcodes, pic16_df_saved_bytes);
9401 fprintf (stderr, "findAll: same flow %u (%u in_vals), other flow %u\n", df_findall_sameflow, df_findall_in_vals, df_findall_otherflow);
9402 //pic16_df_removed_pcodes = pic16_df_saved_bytes = 0;
9406 /* Remove a pCode iff possible:
9407 * - previous pCode is no SKIP
9409 * Returns 1 iff the pCode has been removed, 0 otherwise. */
9410 static int pic16_safepCodeUnlink (pCode *pc, char *comment) {
9411 pCode *pcprev, *pcnext;
9412 char buf[256], *total=NULL;
9415 if (!comment) comment = "=DF= pCode removed by pic16_safepCodeUnlink";
9417 pcprev = pic16_findPrevInstruction (pc->prev);
9418 pcnext = pic16_findNextInstruction (pc->next);
9420 /* if previous instruction is a skip -- do not remove */
9421 if (pcprev && isPCI_SKIP(pcprev)) return 0;
9423 /* move labels to next instruction (if possible) */
9424 if (PCI(pc)->label && !pcnext) return 0;
9426 if (PCI(pc)->label) {
9427 //fprintf (stderr, "%s: moving label(s)\n", __FUNCTION__);
9428 //pc->print (stderr, pc);
9429 PCI(pcnext)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pcnext)->label);
9430 PCI(pc)->label = NULL;
9433 /* update statistics */
9434 pic16_df_removed_pcodes++;
9435 if (isPCI(pc)) pic16_df_saved_bytes += PCI(pc)->isize;
9437 /* remove the pCode */
9438 pic16_pCode2str (buf, 256, pc);
9439 //fprintf (stderr, "%s: removing pCode: %s\n", __FUNCTION__, buf);
9440 if (0 || pic16_debug_verbose || pic16_pcode_verbose) {
9441 len = strlen (buf) + strlen (comment) + 10;
9442 total = (char *) Safe_malloc (len);
9443 SNPRINTF (total, len, "%s: %s", comment, buf);
9444 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(total));
9448 /* actually unlink it from the pBlock -- also remove from to/from lists */
9449 pic16_pCodeUnlink (pc);
9451 /* remove the pCode -- release registers */
9454 /* report success */
9459 /* ======================================================================== */
9460 /* === SYMBOL HANDLING ==================================================== */
9461 /* ======================================================================== */
9463 static hTab *map_strToSym = NULL; /** (char *) --> symbol_t */
9464 static hTab *map_symToStr = NULL; /** symbol_t -> (char *) */
9465 static symbol_t nextSymbol = 0x2000; /** next symbol_t assigned to the next generated symbol */
9467 /** Calculate a hash for a given string.
9468 * If len == 0 the string is assumed to be NUL terminated. */
9469 static hash_t symbolHash (const char *str, unsigned int len) {
9473 hash = (hash << 2) ^ *str;
9478 hash = (hash << 2) ^ *str;
9485 /** Return 1 iff strings v1 and v2 are identical. */
9486 static int symcmp (const void *v1, const void *v2) {
9487 return !strcmp ((const char *) v1, (const char *) v2);
9490 /** Return 1 iff pointers v1 and v2 are identical. */
9491 static int ptrcmp (const void *v1, const void *v2) {
9495 enum { SPO_WREG=0x1000,
9535 /* Return the unique symbol_t for the given string. */
9536 static symbol_t symFromStr (const char *str) {
9541 if (!map_symToStr) {
9543 struct { char *name; symbol_t sym; } predefsyms[] = {
9545 {"STATUS", SPO_STATUS},
9546 {"PRODL", SPO_PRODL},
9547 {"PRODH", SPO_PRODH},
9548 {"INDF0", SPO_INDF0},
9549 {"POSTDEC0", SPO_POSTDEC0},
9550 {"POSTINC0", SPO_POSTINC0},
9551 {"PREINC0", SPO_PREINC0},
9552 {"PLUSW0", SPO_PLUSW0},
9553 {"INDF1", SPO_INDF1},
9554 {"POSTDEC1", SPO_POSTDEC1},
9555 {"POSTINC1", SPO_POSTINC1},
9556 {"PREINC1", SPO_PREINC1},
9557 {"PLUSW1", SPO_PLUSW1},
9558 {"INDF2", SPO_INDF2},
9559 {"POSTDEC2", SPO_POSTDEC2},
9560 {"POSTINC2", SPO_POSTINC2},
9561 {"PREINC2", SPO_PREINC2},
9562 {"PLUSW2", SPO_PLUSW2},
9563 {"STKPTR", SPO_STKPTR},
9568 {"FSR0L", SPO_FSR0L},
9569 {"FSR0H", SPO_FSR0H},
9570 {"FSR1L", SPO_FSR1L},
9571 {"FSR1H", SPO_FSR1H},
9572 {"FSR2L", SPO_FSR2L},
9573 {"FSR2H", SPO_FSR2H},
9575 {"PCLATH", SPO_PCLATH},
9576 {"PCLATU", SPO_PCLATU},
9577 {"TABLAT", SPO_TABLAT},
9578 {"TBLPTRL", SPO_TBLPTRL},
9579 {"TBLPTRH", SPO_TBLPTRH},
9580 {"TBLPTRU", SPO_TBLPTRU},
9584 map_strToSym = newHashTable (128);
9585 map_symToStr = newHashTable (128);
9587 for (i=0; predefsyms[i].name; i++) {
9590 /* enter new symbol */
9591 sym = predefsyms[i].sym;
9592 name = predefsyms[i].name;
9593 res = Safe_strdup (name);
9594 hash = symbolHash (name, 0);
9596 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9597 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9601 hash = symbolHash (str, 0) % map_strToSym->size;
9603 /* find symbol in table */
9604 sym = PTR_TO_INT(hTabFindByKey (map_strToSym, hash, str, &symcmp));
9606 //fprintf (stderr, "found symbol %u for %s\n", sym, str);
9610 /* enter new symbol */
9612 res = Safe_strdup (str);
9614 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9615 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9617 //fprintf (stderr, "created symbol %u for %s\n", sym, res);
9623 static const char *strFromSym (symbol_t sym) {
9624 return (const char *) hTabFindByKey (map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), &ptrcmp);
9628 /* ======================================================================== */
9629 /* === DEFINITION MAP HANDLING ============================================ */
9630 /* ======================================================================== */
9632 /* A defmap provides information about which symbol is defined by which pCode.
9633 * The most recent definitions are prepended to the list, so that the most
9634 * recent definition can be found by forward scanning the list.
9635 * pc2: MOVFF r0x00, r0x01
9637 * head --> ("r0x01",pc1,42) --> ("STATUS",pc1,44) --> ("r0x01",pc2,28) --> NULL
9639 * We attach one defmap to each flow object, and each pCode will occur at
9640 * least once in its flow's defmap (maybe defining the 0 symbol). This can be
9641 * used to find definitions for a pCode in its own defmap that precede pCode.
9644 typedef struct defmap_s {
9645 symbol_t sym; /** symbol this item refers to */
9648 unsigned int in_mask:8; /** mask leaving in accessed bits */
9649 unsigned int mask:8; /** mask leaving in modified bits (if isWrite) */
9650 int isRead:1; /** sym/mask is read */
9651 int isWrite:1; /** sym/mask is written */
9655 pCode *pc; /** pCode this symbol is refrenced at */
9656 valnum_t in_val; /** valnum_t of symbol's previous value (the one read at pc) */
9657 valnum_t val; /** new unique number for this value (if isWrite) */
9658 struct defmap_s *prev, *next; /** link to previous an next definition */
9661 static defmap_t *defmap_free = NULL; /** list of unused defmaps */
9662 static int defmap_free_count = 0; /** number of released defmap items */
9664 /* Returns a defmap_t with the specified data; this will be the new list head.
9665 * next - pointer to the current list head */
9666 static defmap_t *newDefmap (symbol_t sym, int in_mask, int mask, int isRead, int isWrite, pCode *pc, valnum_t val, defmap_t *next) {
9671 defmap_free = map->next;
9672 --defmap_free_count;
9674 map = (defmap_t *) Safe_calloc (1, sizeof (defmap_t));
9677 map->acc.access.in_mask = (isRead ? (in_mask ? in_mask : 0xFF) : 0x00);
9678 map->acc.access.mask = (isWrite ? (mask ? mask : 0xFF) : 0x00);
9679 map->acc.access.isRead = (isRead != 0);
9680 map->acc.access.isWrite = (isWrite != 0);
9683 map->val = (isWrite ? val : 0);
9686 if (next) next->prev = map;
9691 /* Returns a copy of the single defmap item. */
9692 static defmap_t *copyDefmap (defmap_t *map) {
9693 defmap_t *res = (defmap_t *) Safe_malloc (sizeof (defmap_t));
9694 memcpy (res, map, sizeof (defmap_t));
9700 /* Insert a defmap item after the specified one. */
9701 static int defmapInsertAfter (defmap_t *ref, defmap_t *newItem) {
9702 if (!ref || !newItem) return 1;
9704 newItem->next = ref->next;
9705 newItem->prev = ref;
9706 ref->next = newItem;
9707 if (newItem->next) newItem->next->prev = newItem;
9712 /* Check whether item (or an identical one) is already in the chain and add it if neccessary.
9713 * item is copied before insertion into chain and therefore left untouched.
9714 * Returns 1 iff the item has been inserted into the list, 0 otherwise. */
9715 static int defmapAddCopyIfNew (defmap_t **head, defmap_t *item) {
9718 while (dummy && (dummy->sym != item->sym
9719 || dummy->pc != item->pc
9720 || dummy->acc.accessmethod != item->acc.accessmethod
9721 || dummy->val != item->val
9722 || dummy->in_val != item->in_val)) {
9723 dummy = dummy->next;
9726 /* item already present? */
9727 if (dummy) return 0;
9729 /* otherwise: insert copy of item */
9730 dummy = copyDefmap (item);
9731 dummy->next = *head;
9732 if (*head) (*head)->prev = dummy;
9738 /* Releases a defmap. This also removes the map from its chain -- update the head manually! */
9739 static void deleteDefmap (defmap_t *map) {
9742 /* unlink from chain -- fails for the first item (head is not updated!) */
9743 if (map->next) map->next->prev = map->prev;
9744 if (map->prev) map->prev->next = map->next;
9747 memset (map, 0, sizeof (defmap_t));
9749 /* save for future use */
9750 map->next = defmap_free;
9752 ++defmap_free_count;
9755 /* Release all defmaps referenced from map. */
9756 static void deleteDefmapChain (defmap_t **_map) {
9757 defmap_t *map, *next;
9763 /* find list head */
9764 while (map && map->prev) map = map->prev;
9766 /* delete all items */
9776 /* Free all defmap items. */
9777 static void freeDefmap (defmap_t **_map) {
9785 /* find list head */
9786 while (map->prev) map = map->prev;
9788 /* release all items */
9798 /* Returns the most recent definition for the given symbol preceeding pc.
9799 * If no definition is found, NULL is returned.
9800 * If pc == NULL the whole list is scanned. */
9801 static defmap_t *defmapFindDef (defmap_t *map, symbol_t sym, pCode *pc) {
9802 defmap_t *curr = map;
9805 /* skip all definitions up to pc */
9806 while (curr && (curr->pc != pc)) curr = curr->next;
9808 /* pc not in the list -- scan the whole list for definitions */
9810 fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9813 /* skip all definitions performed by pc */
9814 while (curr && (curr->pc == pc)) curr = curr->next;
9818 /* find definition for sym */
9819 while (curr && (!curr->acc.access.isWrite || (curr->sym != sym))) {
9827 /* Returns the first use (read) of the given symbol AFTER pc.
9828 * If no such use is found, NULL is returned.
9829 * If pc == NULL the whole list is scanned. */
9830 static defmap_t *defmapFindUse (defmap_t *map, symbol_t sym, pCode *pc) {
9831 defmap_t *curr = map, *prev = NULL;
9834 /* skip all definitions up to pc */
9835 while (curr && (curr->pc != pc)) { prev = curr; curr = curr->next; }
9837 /* pc not in the list -- scan the whole list for definitions */
9839 //fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9843 /* find end of list */
9844 while (curr && curr->next) curr = curr->next;
9847 /* find use of sym (scan list backwards) */
9848 while (curr && (!curr->acc.access.isRead || (curr->sym != sym))) curr = curr->prev;
9854 /* Return the defmap entry for sym AT pc.
9855 * If none is found, NULL is returned.
9856 * If more than one entry is found an assertion is triggered. */
9857 static defmap_t *defmapCurr (defmap_t *map, symbol_t sym, pCode *pc) {
9858 defmap_t *res = NULL;
9860 /* find entries for pc */
9861 while (map && map->pc != pc) map = map->next;
9863 /* find first entry for sym @ pc */
9864 while (map && map->pc == pc && map->sym != sym) map = map->next;
9866 /* no entry found */
9867 if (!map) return NULL;
9869 /* check for more entries */
9872 while (map && map->pc == pc) {
9873 /* more than one entry for sym @ pc found? */
9874 assert (map->sym != sym);
9878 /* return single entry for sym @ pc */
9882 /* Modifies the definition of sym at pCode to newval.
9883 * Returns 0 on success, 1 if no definition of sym in pc has been found.
9885 static int defmapUpdate (defmap_t *map, symbol_t sym, pCode *pc, valnum_t newval) {
9888 /* find definitions of pc */
9889 while (m && m->pc != pc) m = m->next;
9891 /* find definition of sym at pc */
9892 while (m && m->pc == pc && (!m->acc.access.isWrite || (m->sym != sym))) m = m->next;
9894 /* no definition found */
9900 /* update following uses of sym */
9901 while (m && m->pc == pc) m = m->prev;
9903 if (m->sym == sym) {
9905 if (m->acc.access.isWrite) m = NULL;
9913 /* ======================================================================== */
9914 /* === STACK ROUTINES ===================================================== */
9915 /* ======================================================================== */
9917 typedef struct stack_s {
9919 struct stack_s *next;
9922 typedef stackitem_t *dynstack_t;
9923 static stackitem_t *free_stackitems = NULL;
9925 /* Create a stack with one item. */
9926 static dynstack_t *newStack () {
9927 dynstack_t *s = (dynstack_t *) Safe_malloc (sizeof (dynstack_t));
9932 /* Remove a stack -- its items are only marked free. */
9933 static void deleteStack (dynstack_t *s) {
9939 i->next = free_stackitems;
9940 free_stackitems = i;
9945 /* Release all stackitems. */
9946 static void releaseStack () {
9949 while (free_stackitems) {
9950 i = free_stackitems->next;
9951 Safe_free(free_stackitems);
9952 free_stackitems = i;
9956 static void stackPush (dynstack_t *stack, void *data) {
9959 if (free_stackitems) {
9960 i = free_stackitems;
9961 free_stackitems = free_stackitems->next;
9963 i = (stackitem_t *) Safe_calloc (1, sizeof (stackitem_t));
9970 static void *stackPop (dynstack_t *stack) {
9974 if (stack && *stack) {
9975 data = (*stack)->data;
9977 *stack = (*stack)->next;
9978 i->next = free_stackitems;
9979 free_stackitems = i;
9987 static int stackContains (dynstack_t *s, void *data) {
9992 if (i->data == data) return 1;
10001 static int stackIsEmpty (dynstack_t *s) {
10002 return (*s == NULL);
10011 static state_t *newState (pCodeFlow *flow, defmap_t *lastdef) {
10012 state_t *s = (state_t *) Safe_calloc (1, sizeof (state_t));
10014 s->lastdef = lastdef;
10018 static void deleteState (state_t *s) {
10022 static int stateIsNew (state_t *state, dynstack_t *todo, dynstack_t *done) {
10025 /* scan working list for state */
10029 /* is i == state? -- state not new */
10030 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10038 /* is i == state? -- state not new */
10039 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10044 /* not found -- state is new */
10048 static inline valnum_t newValnum ();
10050 const char *pic16_pBlockGetFunctionName (pBlock *pb) {
10053 if (!pb) return "<unknown function>";
10055 pc = pic16_findNextpCode (pb->pcHead, PC_FUNCTION);
10056 if (pc && isPCF(pc)) return PCF(pc)->fname;
10057 else return "<unknown function>";
10060 static defmap_t *pic16_pBlockAddInval (pBlock *pb, symbol_t sym) {
10064 pcfl = PCI(pic16_findNextInstruction (pb->pcHead))->pcflow;
10066 /* find initial value (assigning pc == NULL) */
10067 map = PCFL(pcfl)->in_vals;
10068 while (map && map->sym != sym) map = map->next;
10070 /* initial value already present? */
10072 //fprintf (stderr, "found init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10076 /* create a new initial value */
10077 map = newDefmap (sym, 0x00, 0xff, 0, 1, NULL, newValnum(), PCFL(pcfl)->in_vals);
10078 PCFL(pcfl)->in_vals = map;
10079 //fprintf (stderr, "Created init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10083 /* insert map as last item in pcfl's defmap */
10084 if (!prev) prev = PCFL(pcfl)->defmap;
10086 PCFL(pcfl)->defmap = map;
10088 while (prev->next) prev = prev->next;
10097 /* Find all reaching definitions for sym at pc.
10098 * A new (!) list of definitions is returned.
10099 * Returns the number of reaching definitions found.
10100 * The defining defmap entries are returned in *chain.
10102 static int defmapFindAll (symbol_t sym, pCode *pc, defmap_t **chain) {
10107 pCodeFlowLink *succ;
10109 dynstack_t *todo; /** stack of state_t */
10110 dynstack_t *done; /** stack of state_t */
10112 int firstState, n_defs;
10114 assert (pc && isPCI(pc) && PCI(pc)->pcflow);
10117 /* initialize return list */
10120 /* wildcard symbol? */
10121 if (!sym) return 0;
10123 //fprintf (stderr, "Searching definition of sym %s(%x) @ pc %p(%p)\n", strFromSym(sym), sym, pc, pc->pb);
10125 map = PCI(pc)->pcflow->defmap;
10127 res = defmapFindDef (map, sym, pc);
10128 //if (res) fprintf (stderr, "found def in own flow @ pc %p\n", res->pc);
10130 #define USE_PRECALCED_INVALS 1
10131 #if USE_PRECALCED_INVALS
10132 if (!res && PCI(pc)->pcflow->in_vals) {
10133 res = defmapFindDef (PCI(pc)->pcflow->in_vals, sym, NULL);
10135 //fprintf (stderr, "found def in init values\n");
10136 df_findall_in_vals++;
10142 // found a single definition (in pc's flow)
10143 //fprintf (stderr, "unique definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10144 defmapAddCopyIfNew (chain, res);
10145 df_findall_sameflow++;
10149 #if USE_PRECALCED_INVALS
10151 defmapAddCopyIfNew (chain, pic16_pBlockAddInval (pc->pb, sym));
10157 #define FORWARD_FLOW_ANALYSIS 1
10158 #if defined FORWARD_FLOW_ANALYSIS && FORWARD_FLOW_ANALYSIS
10159 /* no definition found in pc's flow preceeding pc */
10160 todo = newStack ();
10161 done = newStack ();
10162 n_defs = 0; firstState = 1;
10163 stackPush (todo, newState (PCI(pic16_findNextInstruction(pc->pb->pcHead))->pcflow, res));
10165 while (!stackIsEmpty (todo)) {
10166 state = (state_t *) stackPop (todo);
10167 stackPush (done, state);
10168 curr = state->flow;
10169 res = state->lastdef;
10170 //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);
10172 /* there are no definitions BEFORE pc in pc's flow (see above) */
10173 if (curr == PCI(pc)->pcflow) {
10175 //fprintf (stderr, "symbol %s(%x) might be used uninitialized at %p\n", strFromSym(sym), sym, pc);
10176 res = pic16_pBlockAddInval (pc->pb, sym);
10177 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10180 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10181 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10185 /* save last definition of sym in this flow as initial def in successors */
10186 res = defmapFindDef (curr->defmap, sym, NULL);
10187 if (!res) res = state->lastdef;
10189 /* add successors to working list */
10190 state = newState (NULL, NULL);
10191 succ = (pCodeFlowLink *) setFirstItem (curr->to);
10193 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10194 state->flow = succ->pcflow;
10195 state->lastdef = res;
10196 if (stateIsNew (state, todo, done)) {
10197 stackPush (todo, state);
10198 state = newState (NULL, NULL);
10200 succ = (pCodeFlowLink *) setNextItem (curr->to);
10202 deleteState (state);
10205 #else // !FORWARD_FLOW_ANALYSIS
10207 /* no definition found in pc's flow preceeding pc */
10208 todo = newStack ();
10209 done = newStack ();
10210 n_defs = 0; firstState = 1;
10211 stackPush (todo, newState (PCI(pc)->pcflow, res));
10213 while (!stackIsEmpty (todo)) {
10214 state = (state_t *) stackPop (todo);
10215 curr = state->flow;
10219 /* only check predecessor flows */
10221 /* get (last) definition of sym in this flow */
10222 res = defmapFindDef (curr->defmap, sym, NULL);
10226 /* definition found */
10227 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10228 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10230 /* no definition found -- check predecessor flows */
10231 state = newState (NULL, NULL);
10232 succ = (pCodeFlowLink *) setFirstItem (curr->from);
10234 /* if no flow predecessor available -- sym might be uninitialized */
10236 //fprintf (stder, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10237 res = newDefmap (sym, 0xff, 0, 1, NULL, 0, *chain);
10238 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10239 deleteDefmap (res); res = NULL;
10243 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10244 state->flow = succ->pcflow;
10245 state->lastdef = res;
10246 if (stateIsNew (state, todo, done)) {
10247 stackPush (todo, state);
10248 state = newState (NULL, NULL);
10250 succ = (pCodeFlowLink *) setNextItem (curr->from);
10252 deleteState (state);
10258 /* clean up done stack */
10259 while (!stackIsEmpty(done)) {
10260 deleteState ((state_t *) stackPop (done));
10262 deleteStack (done);
10264 /* return number of items in result set */
10266 //fprintf (stderr, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10267 } else if (n_defs == 1) {
10269 //fprintf (stderr, "sym %s at %p always defined as %x @ %p\n", strFromSym(sym), pc, (*chain)->val, (*chain)->pc);
10270 } else if (n_defs > 0) {
10271 //fprintf (stderr, "%u definitions for sym %s at %p found:\n", n_defs, strFromSym(sym), pc);
10275 fprintf (stderr, " as %4x @ %p\n", res->val, res->pc);
10280 //fprintf (stderr, "%u definitions for sym %s at %p found\n", n_defs, strFromSym(sym), pc);
10281 df_findall_otherflow++;
10285 /* ======================================================================== */
10286 /* === VALUE NUMBER HANDLING ============================================== */
10287 /* ======================================================================== */
10289 static valnum_t nextValnum = 0x1000;
10290 static hTab *map_symToValnum = NULL;
10292 /** Return a new value number. */
10293 static inline valnum_t newValnum () {
10294 return (nextValnum += 4);
10297 static valnum_t valnumFromStr (const char *str) {
10302 sym = symFromStr (str);
10304 if (!map_symToValnum) {
10305 map_symToValnum = newHashTable (128);
10308 /* literal already known? */
10309 res = hTabFindByKey (map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), &ptrcmp);
10311 /* return existing valnum */
10312 if (res) return (valnum_t) PTR_TO_INT(res);
10314 /* create new valnum */
10316 hTabAddItemLong (&map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), INT_TO_PTR(val));
10320 /* Create a valnum for a literal. */
10321 static valnum_t valnumFromLit (unsigned int lit) {
10322 return ((valnum_t) 0x100 + (lit & 0x0FF));
10325 /* Return the (positive) literal value represented by val
10326 * or -1 iff val is no known literal's valnum. */
10327 static int litFromValnum (valnum_t val) {
10328 if (val >= 0x100 && val < 0x200) {
10329 /* valnum is a (known) literal */
10330 return val & 0x00FF;
10332 /* valnum is not a known literal */
10338 /* Sanity check - all flows in a block must be reachable from initial flow. */
10339 static int verifyAllFlowsReachable (pBlock *pb) {
10345 pCodeFlowLink *succ;
10348 //fprintf (stderr, "%s - started for %s.\n" ,__FUNCTION__, pic16_pBlockGetFunctionName (pb));
10351 flowInBlock = NULL;
10353 /* mark initial flow as reached (and "not needs to be reached") */
10354 pc = pic16_findNextpCode (pb->pcHead, PC_FLOW);
10356 addSetHead (&reached, pc);
10357 addSetHead (&checked, pc);
10359 /* mark all further flows in block as "need to be reached" */
10362 if (isPCI(pc)) addSetIfnotP (&flowInBlock, PCI(pc)->pcflow);
10363 pc = pic16_findNextInstruction (pc->next);
10366 while (reached && (pcfl = (pCodeFlow *)indexSet (reached, 0)) != NULL) {
10367 /* mark as reached and "not need to be reached" */
10368 deleteSetItem (&reached, pcfl);
10369 //fprintf (stderr, "%s - checking %p\n" ,__FUNCTION__, pcfl);
10371 /* flow is no longer considered unreachable */
10372 deleteSetItem (&flowInBlock, pcfl);
10374 for (succ = setFirstItem (pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10375 if (!isinSet (checked, succ->pcflow)) {
10376 /* flow has never been reached before */
10377 addSetHead (&reached, succ->pcflow);
10378 addSetHead (&checked, succ->pcflow);
10383 //fprintf (stderr, "%s - finished\n", __FUNCTION__);
10385 /* by now every flow should have been reached
10386 * --> flowInBlock should be empty */
10387 res = (flowInBlock == NULL);
10391 fprintf (stderr, "not all flows reached in %s:\n", pic16_pBlockGetFunctionName (pb));
10392 while (flowInBlock) {
10393 pcfl = indexSet (flowInBlock, 0);
10394 fprintf (stderr, "not reached: flow %p\n", pcfl);
10395 deleteSetItem (&flowInBlock, pcfl);
10401 deleteSet (&reached);
10402 deleteSet (&flowInBlock);
10403 deleteSet (&checked);
10405 /* if we reached every flow, succ is NULL by now... */
10406 //assert (res); // will fire on unreachable code...
10411 /* Checks a flow for accesses to sym AFTER pc.
10413 * Returns -1 if the symbol is read in this flow (before redefinition),
10414 * returns 0 if the symbol is redefined in this flow or
10415 * returns a mask [0x01 -- 0xFF] indicating the bits still alive after this flow.
10417 int pic16_isAliveInFlow (symbol_t sym, int mask, pCodeFlow *pcfl, pCode *pc) {
10418 defmap_t *map, *mappc;
10420 /* find pc or start of definitions */
10421 map = pcfl->defmap;
10422 while (map && (map->pc != pc) && map->next) map = map->next;
10423 /* if we found pc -- ignore it */
10424 while (map && map->pc == pc) map = map->prev;
10426 /* scan list backwards (first definition first) */
10427 while (map && mask) {
10428 // if (map->sym == sym) {
10429 //fprintf (stderr, "%s: accessing sym %s in pc %p/map %p\n", __FUNCTION__, strFromSym(sym), map->pc, map);
10431 /* scan list for reads at this pc first */
10432 while (map && map->pc == mappc->pc) {
10433 /* is the symbol (partially) read? */
10434 if ((map->sym == sym) && (map->acc.access.isRead && ((map->acc.access.in_mask & mask) != 0))) {
10435 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s read at pc %p\n", __FUNCTION__, strFromSym (sym), map->pc);
10442 while (map && map->pc == mappc->pc) {
10443 /* honor (partial) redefinitions of sym */
10444 if ((map->sym == sym) && (map->acc.access.isWrite)) {
10445 mask &= ~map->acc.access.mask;
10446 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s redefined at pc %p, alive mask: %x\n", __FUNCTION__, strFromSym (sym), map->pc, mask);
10451 /* map already points to the first defmap for the next pCode */
10452 //map = mappc->prev;
10455 /* the symbol is not completely redefined in this flow and not accessed -- symbol
10456 * is still alive; return the appropriate mask of alive bits */
10460 /* Check whether a symbol is alive (AFTER pc). */
10461 static int pic16_isAlive (symbol_t sym, pCode *pc) {
10464 dynstack_t *todo, *done;
10467 pCodeFlowLink *succ;
10471 assert (isPCI(pc));
10472 pcfl = PCI(pc)->pcflow;
10473 map = pcfl->defmap;
10475 todo = newStack ();
10476 done = newStack ();
10478 state = newState (pcfl, (defmap_t *) INT_TO_PTR(mask));
10479 stackPush (todo, state);
10482 while (!stackIsEmpty (todo)) {
10483 state = (state_t *) stackPop (todo);
10484 pcfl = state->flow;
10485 mask = PTR_TO_INT(state->lastdef);
10486 if (visit) stackPush (done, state); else deleteState(state);
10487 //fprintf (stderr, "%s: checking flow %p for symbol %s (%x)/%x\n", __FUNCTION__, pcfl, strFromSym(sym), sym, mask);
10488 // make sure flows like A(i1,i2,pc,i3,...) --> A with pc reading and writing sym are handled correctly!
10489 mask = pic16_isAliveInFlow (sym, mask, pcfl, visit == 0 ? pc : NULL);
10492 /* symbol is redefined in flow before use -- not alive in this flow (maybe in others?) */
10493 if (mask == 0) continue;
10495 /* symbol is (partially) read before redefinition in flow */
10496 if (mask == -1) break;
10498 /* symbol is neither read nor completely redefined -- check successor flows */
10499 for (succ = setFirstItem(pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10500 state = newState (succ->pcflow, (defmap_t *) INT_TO_PTR(mask));
10501 if (stateIsNew (state, todo, done)) {
10502 stackPush (todo, state);
10504 deleteState (state);
10509 while (!stackIsEmpty (todo)) deleteState ((state_t *) stackPop (todo));
10510 while (!stackIsEmpty (done)) deleteState ((state_t *) stackPop (done));
10512 /* symbol is read in at least one flow -- is alive */
10513 if (mask == -1) return 1;
10515 /* symbol is read in no flow */
10519 /* Returns whether access to the given symbol has side effects. */
10520 static int pic16_symIsSpecial (symbol_t sym) {
10521 //fprintf (stderr, "%s: sym=%x\n", __FUNCTION__, sym);
10541 /* no special effects known */
10548 /* Check whether a register should be considered local (to the current function) or not. */
10549 static int pic16_regIsLocal (regs *r) {
10552 sym = symFromStr (r->name);
10555 case SPO_FSR0L: // used in ptrget/ptrput
10556 case SPO_FSR0H: // ... as well
10557 case SPO_FSR1L: // used as stack pointer... (so not really local but shared among function calls)
10558 case SPO_FSR1H: // ... as well
10559 case SPO_FSR2L: // used as frame pointer
10560 case SPO_FSR2H: // ... as well
10561 case SPO_PRODL: // used to return values from functions
10562 case SPO_PRODH: // ... as well
10563 /* these registers (and some more...) are considered local */
10567 /* for unknown regs: check is marked local, leave if not */
10571 //fprintf (stderr, "%s: non-local reg used: %s\n", __FUNCTION__, r->name);
10577 /* if in doubt, assume non-local... */
10581 /* Check all symbols touched by pc whether their newly assigned values are read.
10582 * Returns 0 if no symbol is used later on, 1 otherwise. */
10583 static int pic16_pCodeIsAlive (pCode *pc) {
10584 pCodeInstruction *pci;
10585 defmap_t *map, *lastpc;
10588 /* we can only handle PCIs */
10589 if (!isPCI(pc)) return 1;
10591 //pc->print (stderr, pc);
10594 assert (pci && pci->pcflow && pci->pcflow->defmap);
10596 /* NEVER remove instructions with implicit side effects */
10599 case POC_TBLRD_POSTINC: /* modify TBLPTRx */
10600 case POC_TBLRD_POSTDEC:
10601 case POC_TBLRD_PREINC:
10602 case POC_TBLWT: /* modify program memory */
10603 case POC_TBLWT_POSTINC: /* modify TBLPTRx */
10604 case POC_TBLWT_POSTDEC:
10605 case POC_TBLWT_PREINC:
10606 case POC_CLRWDT: /* clear watchdog timer */
10607 case POC_PUSH: /* should be safe to remove though... */
10608 case POC_POP: /* should be safe to remove though... */
10613 //fprintf (stderr, "%s: instruction with implicit side effects not removed: %s\n", __FUNCTION__, pci->mnemonic);
10617 /* no special instruction */
10621 /* prevent us from removing assignments to non-local variables */
10623 if (PCI(pc)->outCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10624 else if (PCI(pc)->outCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10626 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10627 /* assignment to DIRECT operand like "BSF (_global + 1),6" */
10628 //fprintf (stderr, "%s: assignment to register detected, but register not available!\n", __FUNCTION__);
10629 //pc->print (stderr, pc);
10632 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10633 //fprintf (stderr, "%s: dest-reg not local %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10638 /* OVERKILL: prevent us from removing reads from non-local variables
10639 * THIS IS HERE TO AVOID PROBLEMS WITH VOLATILE OPERANDS ONLY!
10640 * Once registers get a "isVolatile" field this might be handled more efficiently... */
10642 if (PCI(pc)->inCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10643 else if (PCI(pc)->inCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10645 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10646 /* read from DIRECT operand like "BTFSS (_global + 1),6" -- might be volatile */
10647 //fprintf (stderr, "%s: read from register detected, but register not available!\n", __FUNCTION__);
10648 //pc->print (stderr, pc);
10651 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10652 //fprintf (stderr, "%s: src-reg not local: %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10657 /* now check that the defined symbols are not used */
10658 map = pci->pcflow->defmap;
10660 /* find items for pc */
10661 while (map && map->pc != pc) map = map->next;
10663 /* no entries found? something is fishy with DF analysis... -- play safe */
10664 if (!map) { fprintf (stderr, "%s: defmap not found\n", __FUNCTION__); return 1; }
10666 /* remember first item assigned to pc for later use */
10669 /* check all symbols being modified by pc */
10670 while (map && map->pc == pc) {
10671 if (map->sym == 0) { map = map->next; continue; }
10673 /* keep pc if it references special symbols (like POSTDEC0) */
10677 pic16_pCode2str (buf, 256, pc);
10678 fprintf (stderr, "%s: checking for sym %x(%s) at pc %p (%s)\n", __FUNCTION__, map->sym, strFromSym (map->sym), pc, buf);
10681 if (pic16_symIsSpecial (map->sym)) {
10682 //fprintf (stderr, "%s: special sym\n", __FUNCTION__);
10685 if (map->acc.access.isWrite) {
10686 if (pic16_isAlive (map->sym, pc)) {
10687 //fprintf (stderr, "%s(%s): pCode is alive (sym %s still used)\n", __FUNCTION__, pic16_pBlockGetFunctionName (pc->pb),strFromSym (map->sym));
10694 /* no use for any of the pc-assigned symbols found -- pCode is dead and can be removed */
10698 pic16_pCode2str (buf, 256, pc);
10699 fprintf (stderr, "%s: pCode %p (%s) is dead.\n", __FUNCTION__, pc, buf);
10705 /* Adds implied operands to the list.
10706 * sym - operand being accessed in the pCode
10707 * list - list to append the operand
10708 * isRead - set to 1 iff sym is read in pCode
10709 * listRead - set to 1 iff all operands being read are to be listed
10711 * Returns 0 for "normal" operands, 1 for special operands.
10713 static int fixupSpecialOperands (symbol_t sym, int in_mask, int mask, pCode *pc, valnum_t val, defmap_t **list, int isRead, int isWrite) {
10714 /* check whether accessing REG accesses other REGs as well */
10718 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10719 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10720 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10724 /* reads FSR0x and WREG */
10725 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10726 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10727 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10728 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10734 /* reads/modifies FSR0x */
10735 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10736 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10737 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10742 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10743 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10744 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10748 /* reads FSR1x and WREG */
10749 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10750 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10751 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10752 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10758 /* reads/modifies FSR1x */
10759 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10760 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10761 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10766 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10767 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10768 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10772 /* reads FSR2x and WREG */
10773 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10774 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10775 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10776 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10782 /* reads/modifies FSR2x */
10783 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10784 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10785 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10789 /* modifies PCLATH and PCLATU */
10790 *list = newDefmap (SPO_PCL, 0xff, 0xff, isRead, isWrite, pc, newValnum (), *list);
10792 /* reading PCL updates PCLATx */
10793 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10794 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10797 /* writing PCL implicitly reads PCLATx (computed GOTO) */
10798 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 1, 0, pc, 0, *list);
10799 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 1, 0, pc, 0, *list);
10804 *list = newDefmap (sym, in_mask, mask, isRead, isWrite, pc, val, *list);
10805 /* nothing special */
10810 /* has been a special operand */
10814 static symbol_t pic16_fsrsym_idx[][2] = {
10815 {SPO_FSR0L, SPO_FSR0H},
10816 {SPO_FSR1L, SPO_FSR1H},
10817 {SPO_FSR2L, SPO_FSR2H}
10820 /* Merge multiple defmap entries for the same symbol for list's pCode. */
10821 static void mergeDefmapSymbols (defmap_t *list) {
10822 defmap_t *ref, *curr, *temp;
10824 /* now make sure that each symbol occurs at most once per pc */
10826 while (ref && (ref->pc == list->pc)) {
10828 while (curr && (curr->pc == list->pc)) {
10829 if (curr->sym == ref->sym) {
10830 //fprintf (stderr, "Merging defmap entries for symbol %s\n", strFromSym (ref->sym));
10831 /* found a symbol occuring twice... merge the two */
10832 if (curr->acc.access.isRead) {
10833 //if (ref->acc.access.isRead) fprintf (stderr, "symbol %s was marked twice as read at pc %p\n", strFromSym (ref->sym), ref->pc);
10834 ref->acc.access.isRead = 1;
10835 ref->acc.access.in_mask |= curr->acc.access.in_mask;
10837 if (curr->acc.access.isWrite) {
10838 //if (ref->acc.access.isWrite) fprintf (stderr, "symbol %s was marked twice as written at pc %p\n", strFromSym (ref->sym), ref->pc);
10839 ref->acc.access.isWrite = 1;
10840 ref->acc.access.mask |= curr->acc.access.mask;
10844 deleteDefmap (temp);
10845 continue; // do not skip curr!
10853 /** Prepend list with the reads and definitions performed by pc. */
10854 static defmap_t *createDefmap (pCode *pc, defmap_t *list) {
10855 pCodeInstruction *pci;
10856 int cond, inCond, outCond;
10857 int mask = 0xff, smask;
10858 int isSpecial, isSpecial2;
10859 symbol_t sym, sym2;
10863 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
10864 /* TODO: mark this defmap node as an ASMDIR -- any values might be read/modified */
10865 fprintf (stderr, "ASMDIRs not supported by data flow analysis!\n");
10866 list = newDefmap (0, 0xff, 0xff, 0, 0, pc, 0, list);
10869 assert (isPCI(pc));
10872 /* handle bit instructions */
10873 if (pci->isBitInst) {
10874 assert (pci->pcop->type == PO_GPR_BIT);
10875 mask = 1U << (PCORB(PCI(pc)->pcop)->bit);
10878 /* handle (additional) implicit arguments */
10884 lit = PCOL(pci->pcop)->lit;
10885 assert (lit >= 0 && lit < 3);
10886 //fprintf (stderr, "LFSR: %s // %s\n", pci->pcop->name, ((pCodeOpLit2 *)(pci->pcop))->arg2->name);
10887 val = valnumFromStr (((pCodeOpLit2 *)(pci->pcop))->arg2->name);
10888 //fprintf (stderr, "LFSR lit=%u, symval=%4x\n", lit, val);
10889 list = newDefmap (pic16_fsrsym_idx[lit][0], 0x00, 0xff, 0, 1, pc, val, list);
10890 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...
10894 case POC_MOVLB: // BSR
10895 case POC_BANKSEL: // BSR
10896 list = newDefmap (SPO_BSR, 0x00, 0xff, 0, 1, pc, valnumFromStr (pic16_get_op (((pCodeOpLit2 *)(pci->pcop))->arg2, NULL, 0)), list);
10899 case POC_MULWF: // PRODx
10900 case POC_MULLW: // PRODx
10901 list = newDefmap (SPO_PRODH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10902 list = newDefmap (SPO_PRODL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10905 case POC_POP: // TOS, STKPTR
10906 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10907 list = newDefmap (SPO_TOSL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10908 list = newDefmap (SPO_TOSH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10909 list = newDefmap (SPO_TOSU, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10912 case POC_PUSH: // STKPTR
10913 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10914 list = newDefmap (SPO_TOSL, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10915 list = newDefmap (SPO_TOSH, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10916 list = newDefmap (SPO_TOSU, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10919 case POC_CALL: // return values (and arguments?): WREG, PRODx, FSR0L
10920 case POC_RCALL: // return values (and arguments?): WREG, PRODx, FSR0L
10921 list = newDefmap (SPO_WREG, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10922 list = newDefmap (SPO_PRODL, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10923 list = newDefmap (SPO_PRODH, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10924 list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10926 /* needs correctly set-up stack pointer */
10927 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10928 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10931 case POC_RETLW: // return values: WREG, PRODx, FSR0L
10932 /* pseudo read on (possible) return values */
10933 // WREG is handled below via outCond
10934 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
10935 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
10936 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
10938 /* caller's stack pointers must be restored */
10939 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10940 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10941 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
10942 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
10945 case POC_RETURN: // return values; WREG, PRODx, FSR0L
10946 case POC_RETFIE: // return value: WREG, PRODx, FSR0L
10947 /* pseudo read on (possible) return values */
10948 list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, list);
10949 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
10950 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
10951 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
10953 /* caller's stack pointers must be restored */
10954 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
10955 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
10956 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
10957 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
10961 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
10962 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
10963 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
10964 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
10967 case POC_TBLRD_POSTINC:
10968 case POC_TBLRD_POSTDEC:
10969 case POC_TBLRD_PREINC:
10970 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10971 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10972 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10973 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
10977 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
10978 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
10979 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
10980 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
10983 case POC_TBLWT_POSTINC:
10984 case POC_TBLWT_POSTDEC:
10985 case POC_TBLWT_PREINC:
10986 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10987 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10988 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
10989 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
10993 /* many instruction implicitly read BSR... -- THIS IS IGNORED! */
10997 /* handle explicit arguments */
10998 inCond = pci->inCond;
10999 outCond = pci->outCond;
11000 cond = inCond | outCond;
11001 if (cond & PCC_W) {
11002 list = newDefmap (symFromStr ("WREG"), mask, mask, inCond & PCC_W, outCond & PCC_W, pc, newValnum (), list);
11005 /* keep STATUS read BEFORE STATUS write in the list (still neccessary?) */
11006 if (inCond & PCC_STATUS) {
11008 if (inCond & PCC_C) smask |= 1U << PIC_C_BIT;
11009 if (inCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11010 if (inCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11011 if (inCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11012 if (inCond & PCC_N) smask |= 1U << PIC_N_BIT;
11014 list = newDefmap (symFromStr ("STATUS"), smask, 0x00, 1, 0, pc, 0, list);
11015 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11018 if (outCond & PCC_STATUS) {
11020 if (outCond & PCC_C) smask |= 1U << PIC_C_BIT;
11021 if (outCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11022 if (outCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11023 if (outCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11024 if (outCond & PCC_N) smask |= 1U << PIC_N_BIT;
11026 list = newDefmap (symFromStr ("STATUS"), 0x00, smask, 0, 1, pc, newValnum (), list);
11027 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11030 isSpecial = isSpecial2 = 0;
11032 if (cond & PCC_REGISTER) {
11033 name = pic16_get_op (pci->pcop, NULL, 0);
11034 sym = symFromStr (name);
11035 isSpecial = fixupSpecialOperands (sym, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER, outCond & PCC_REGISTER);
11036 //fprintf (stderr, "pc %p: def REG %s(%x) & %02x\n", pc, name, sym, mask);
11039 if (cond & PCC_REGISTER2) {
11040 name = pic16_get_op2 (pci->pcop, NULL, 0);
11041 sym2 = symFromStr (name);
11042 isSpecial2 = fixupSpecialOperands (sym2, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER2, outCond & PCC_REGISTER2);
11043 //fprintf (stderr, "pc %p: def REG2 %s(%x) & %02x\n", pc, name, sym2, mask);
11047 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
11048 list = newDefmap (0, 0x00, 0x00, 0, 0, pc, 0, list);
11050 mergeDefmapSymbols (list);
11056 static void printDefmap (defmap_t *map) {
11060 fprintf (stderr, "defmap @ %p:\n", curr);
11062 fprintf (stderr, "%s%s: %4x|%4x / %02x|%02x, sym %s(%x) @ pc %p\n",
11063 curr->acc.access.isRead ? "R" : " ",
11064 curr->acc.access.isWrite ? "W": " ",
11065 curr->in_val, curr->val,
11066 curr->acc.access.in_mask, curr->acc.access.mask,
11067 strFromSym(curr->sym), curr->sym,
11071 fprintf (stderr, "<EOL>\n");
11075 /* Add "additional" definitions to uniq.
11076 * 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.
11077 * This can also be used to create a uniq (out)list from a flow's defmap by passing *uniq==NULL.
11079 * If symbols defined in additional are not present in uniq, a definition is created.
11080 * Otherwise the present definition is altered to reflect the newer assignments.
11082 * flow: <uniq> --> assign1 --> assign2 --> assign3 --> ... --> <uniq'>
11083 * before `------- noted in additional --------' after
11085 * I assume that each symbol occurs AT MOST ONCE in uniq.
11088 static int defmapUpdateUniqueSym (defmap_t **uniq, defmap_t *additional) {
11093 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *uniq, additional);
11094 /* find tail of additional list (holds the first assignment) */
11096 while (curr && curr->next) curr = curr->next;
11100 /* find next assignment in additionals */
11101 while (curr && !curr->acc.access.isWrite) curr = curr->prev;
11105 /* find item in uniq */
11107 //printDefmap (*uniq);
11108 while (old && (old->sym != curr->sym)) old = old->next;
11111 /* definition found -- replace */
11112 if (old->val != curr->val) {
11113 old->val = curr->val;
11117 /* new definition */
11118 *uniq = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, curr->val, *uniq);
11125 /* return 0 iff uniq remained unchanged */
11129 /* Creates the in_value list of a flow by (iteratively) merging the out_value
11130 * lists of its predecessor flows.
11131 * Initially *combined should be NULL, alt_in will be copied to combined.
11132 * If *combined != NULL, combined will be altered:
11133 * - for symbols defined in *combined but not in alt_in,
11134 * *combined is altered to 0 (value unknown, either *combined or INIT).
11135 * - for symbols defined in alt_in but not in *combined,
11136 * a 0 definition is created (value unknown, either INIT or alt).
11137 * - for symbols defined in both, *combined is:
11138 * > left unchanged if *combined->val == alt_in->val or
11139 * > modified to 0 otherwise (value unknown, either alt or *combined).
11141 * I assume that each symbol occurs AT MOST ONCE in each list!
11143 static int defmapCombineFlows (defmap_t **combined, defmap_t *alt_in, pBlock *pb) {
11149 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *combined, alt_in);
11151 if (!(*combined)) {
11152 return defmapUpdateUniqueSym (combined, alt_in);
11155 /* merge the two */
11158 /* find symbols definition in *combined */
11160 while (old && (old->sym != curr->sym)) old = old->next;
11163 /* definition found */
11164 if (old->val && (old->val != curr->val)) {
11165 old->val = 0; /* value unknown */
11169 /* no definition found -- can be either INIT or alt_in's value */
11170 val = pic16_pBlockAddInval (pb, curr->sym)->val;
11171 *combined = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, (val == curr->val) ? val : 0, *combined);
11172 if (val != curr->val) change++;
11178 /* update symbols from *combined that are NOT defined in alt_in -- can be either *combined's value or INIT */
11181 if (old->val != 0) {
11182 /* find definition in alt_in */
11184 while (curr && curr->sym != old->sym) curr = curr->next;
11186 /* symbol defined in *combined only -- can be either INIT or *combined */
11187 val = pic16_pBlockAddInval (pb, old->sym)->val;
11188 if (old->val != val) {
11201 static int defmapCompareUnique (defmap_t *map1, defmap_t *map2) {
11202 defmap_t *curr1, *curr2;
11205 /* identical maps are equal */
11206 if (map1 == map2) return 0;
11208 if (!map1) return -1;
11209 if (!map2) return 1;
11211 //fprintf (stderr, "%s: comparing %p & %p\n", __FUNCTION__, map1, map2);
11216 while (curr1 && curr2) {
11217 curr1 = curr1->next;
11218 curr2 = curr2->next;
11221 /* one of them longer? */
11222 if (curr1) return 1;
11223 if (curr2) return -1;
11225 /* both lists are of equal length -- compare (in O(n^2)) */
11230 while (curr2 && curr2->sym != sym) curr2 = curr2->next;
11231 if (!curr2) return 1; // symbol not found in curr2
11232 if (curr2->val != curr1->val) return 1; // values differ
11234 /* compare next symbol */
11235 curr1 = curr1->next;
11238 /* no difference found */
11243 /* Prepare a list of all reaching definitions per flow.
11244 * This is done using a forward dataflow analysis.
11246 static void createReachingDefinitions (pBlock *pb) {
11247 defmap_t *out_vals, *in_vals;
11250 pCodeFlowLink *link;
11254 /* initialize out_vals to unique'fied defmaps per pCodeFlow */
11255 for (pc = pic16_findNextInstruction (pb->pcHead); pc; pc = pic16_findNextInstruction (pc->next)) {
11257 deleteDefmapChain (&PCFL(pc)->in_vals);
11258 deleteDefmapChain (&PCFL(pc)->out_vals);
11259 defmapUpdateUniqueSym (&PCFL(pc)->out_vals, PCFL(pc)->defmap);
11263 pc = pic16_findNextInstruction (pb->pcHead);
11264 todo = NULL; blacklist = NULL;
11265 addSetHead (&todo, PCI(pc)->pcflow);
11267 //fprintf (stderr, "%s: function %s()\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11268 while (elementsInSet (todo)) {
11269 //fprintf (stderr, "%u items in todo-set\n", elementsInSet (todo));
11270 pcfl = PCFL(indexSet (todo, 0));
11271 deleteSetItem (&todo, pcfl);
11272 //fprintf (stderr, "%s: checking %p\n", __FUNCTION__, pcfl);
11276 if (isinSet (blacklist, pcfl)) {
11277 fprintf (stderr, "ignoring blacklisted flow\n");
11281 /* create in_vals from predecessors out_vals */
11282 link = setFirstItem (pcfl->from);
11284 defmapCombineFlows (&in_vals, link->pcflow->out_vals, pb);
11285 link = setNextItem (pcfl->from);
11288 //printDefmap (in_vals);
11289 //printDefmap (pcfl->in_vals);
11291 if (!pcfl->in_vals || !pcfl->out_vals || defmapCompareUnique (in_vals, pcfl->in_vals)) {
11292 //fprintf (stderr, "in_vals changed\n");
11293 /* in_vals changed -- update out_vals */
11294 deleteDefmapChain (&pcfl->in_vals);
11295 pcfl->in_vals = in_vals;
11297 /* create out_val from in_val and defmap */
11299 defmapUpdateUniqueSym (&out_vals, in_vals);
11300 defmapUpdateUniqueSym (&out_vals, pcfl->defmap);
11302 /* is out_vals different from pcfl->out_vals */
11303 if (!pcfl->out_vals || defmapCompareUnique (out_vals, pcfl->out_vals)) {
11304 //fprintf (stderr, "out_vals changed\n");
11305 deleteDefmapChain (&pcfl->out_vals);
11306 pcfl->out_vals = out_vals;
11308 if (pcfl->out_vals == NULL && pcfl->in_vals == NULL) {
11309 addSet (&blacklist, pcfl);
11312 /* reschedule all successors */
11313 link = setFirstItem (pcfl->to);
11315 //fprintf (stderr, " %p --> %p\n", pcfl, link->pcflow);
11316 addSetIfnotP (&todo, link->pcflow);
11317 link = setNextItem (pcfl->to);
11320 deleteDefmapChain (&out_vals);
11323 deleteDefmapChain (&in_vals);
11329 static void showAllDefs (symbol_t sym, pCode *pc) {
11333 assert (isPCI(pc));
11334 count = defmapFindAll (sym, pc, &map);
11336 fprintf (stderr, "sym %s(%x) @ %p defined as (val@pc): ", strFromSym(sym), sym, pc);
11339 fprintf (stderr, "(%x @ %p) ", map->val, map->pc);
11342 pic16_pCode2str (buf, 256, map->pc);
11343 fprintf (stderr, "\n (%x @ %p(%s)) ", map->val, map->pc, buf);
11347 deleteDefmapChain (&map);
11351 /* safepCodeUnlink and remove pc from defmap. */
11352 static int pic16_safepCodeRemove (pCode *pc, char *comment) {
11353 defmap_t *map, *next, **head;
11357 map = isPCI(pc) ? PCI(pc)->pcflow->defmap : NULL;
11358 head = isPCI(pc) ? &PCI(pc)->pcflow->defmap : NULL;
11359 res = pic16_safepCodeUnlink (pc, comment);
11362 /* remove pc from defmap */
11365 if (map->pc == pc) {
11366 if (!map->prev && head) *head = map->next;
11367 deleteDefmap (map);
11376 void pic16_fixDefmap (pCode *pc, pCode *newpc) {
11378 /* This breaks the defmap chain's references to pCodes... fix it! */
11379 map = PCI(pc)->pcflow->defmap;
11381 while (map && map->pc != pc) map = map->next;
11383 while (map && map->pc == pc) {
11389 /* Replace a defmap entry for sym with newsym for read accesses (isRead == 1) or
11390 * write accesses (isRead == 0). */
11391 void defmapReplaceSymRef (pCode *pc, symbol_t sym, symbol_t newsym, int isRead) {
11392 defmap_t *map, *map_start;
11394 if (!isPCI(pc)) return;
11395 if (sym == newsym) return;
11397 map = PCI(pc)->pcflow->defmap;
11399 while (map && map->pc != pc) map = map->next;
11401 while (map && map->pc == pc) {
11402 if (map->sym == sym) {
11403 assert ((isRead && map->acc.access.isRead) || ((!isRead) && (map->acc.access.isWrite)));
11404 if (!(map->acc.access.isRead && map->acc.access.isWrite)) {
11405 /* only one kind of access handled... this is easy */
11408 /* must copy defmap entry before replacing symbol... */
11409 copy = copyDefmap (map);
11411 map->acc.access.isRead = 0;
11412 copy->acc.access.isWrite = 0;
11414 map->acc.access.isWrite = 0;
11415 copy->acc.access.isRead = 0;
11417 copy->sym = newsym;
11418 /* insert copy into defmap chain */
11419 defmapInsertAfter (map, copy);
11425 /* as this might introduce multiple defmap entries for newsym... */
11426 mergeDefmapSymbols (map_start);
11429 /* Assign "better" valnums to results. */
11430 static void assignValnums (pCode *pc) {
11431 pCodeInstruction *pci;
11433 symbol_t sym1, sym2;
11434 int cond, isSpecial1, isSpecial2, count, mask, lit;
11435 defmap_t *list, *val, *oldval, *dummy;
11436 regs *reg1 = NULL, *reg2 = NULL;
11439 /* only works for pCodeInstructions... */
11440 if (!isPCI(pc)) return;
11443 cond = pci->inCond | pci->outCond;
11444 list = pci->pcflow->defmap;
11445 sym1 = sym2 = isSpecial1 = isSpecial2 = 0;
11447 if (cond & PCC_REGISTER) {
11448 sym1 = symFromStr (pic16_get_op (pci->pcop, NULL, 0));
11449 reg1 = pic16_getRegFromInstruction (pc);
11450 isSpecial1 = pic16_symIsSpecial (sym1);
11452 if (cond & PCC_REGISTER2) {
11453 sym2 = symFromStr (pic16_get_op2 (pci->pcop, NULL, 0));
11454 reg2 = pic16_getRegFromInstruction (pc);
11455 isSpecial2 = pic16_symIsSpecial (sym2);
11458 /* determine input values */
11460 while (val && val->pc != pc) val = val->next;
11461 //list = val; /* might save some time later... */
11462 while (val && val->pc == pc) {
11464 if (val->sym != 0 && (1 || val->acc.access.isRead)) {
11465 /* get valnum for sym */
11466 count = defmapFindAll (val->sym, pc, &oldval);
11467 //fprintf (stderr, "%d defs for sym %s\n", count, strFromSym (val->sym));
11469 if ((val->acc.access.in_mask & oldval->acc.access.mask) == val->acc.access.in_mask) {
11470 val->in_val = oldval->val;
11474 } else if (count == 0) {
11475 /* no definition found */
11478 /* multiple definition(s) found -- value not known (unless always the same valnum) */
11480 dummy = oldval->next;
11481 mask = oldval->acc.access.mask;
11482 val->in_val = oldval->val;
11483 while (dummy && (dummy->val == val->in_val)) {
11484 mask &= dummy->acc.access.mask;
11485 dummy = dummy->next;
11488 /* found other values or to restictive mask */
11489 if (dummy || ((mask & val->acc.access.in_mask) != val->acc.access.in_mask)) {
11493 if (count > 0) deleteDefmapChain (&oldval);
11498 /* handle valnum assignment */
11500 case POC_CLRF: /* modifies STATUS (Z) */
11501 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11502 oldval = defmapCurr (list, sym1, pc);
11503 if (oldval && (litFromValnum (oldval->in_val) == 0)) {
11504 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11505 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant CLRF removed");
11507 defmapUpdate (list, sym1, pc, valnumFromLit(0));
11511 case POC_SETF: /* SETF does not touch STATUS */
11512 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11513 oldval = defmapCurr (list, sym1, pc);
11514 if (oldval && (litFromValnum (oldval->in_val) == 0x00FF)) {
11515 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11516 pic16_safepCodeRemove (pc, "=DF= redundant SETF removed");
11518 defmapUpdate (list, sym1, pc, valnumFromLit (0x00FF));
11522 case POC_MOVLW: /* does not touch STATUS */
11523 oldval = defmapCurr (list, SPO_WREG, pc);
11524 if (pci->pcop->type == PO_LITERAL) {
11525 //fprintf (stderr, "MOVLW: literal %u\n", PCOL(pci->pcop)->lit);
11526 litnum = valnumFromLit ((unsigned char)PCOL(pci->pcop)->lit);
11528 //fprintf (stderr, "MOVLW: %s\n", pic16_get_op (pci->pcop, NULL, 0));
11529 litnum = valnumFromStr (pic16_get_op (pci->pcop, NULL, 0));
11531 if (oldval && oldval->in_val == litnum) {
11532 //fprintf (stderr, "%s: W already set up correctly (%x)\n", PCI(pc)->mnemonic, oldval->in_val);
11533 pic16_safepCodeRemove (pc, "=DF= redundant MOVLW removed");
11535 defmapUpdate (list, SPO_WREG, pc, litnum);
11538 case POC_ANDLW: /* modifies STATUS (Z,N) */
11539 case POC_IORLW: /* modifies STATUS (Z,N) */
11540 case POC_XORLW: /* modifies STATUS (Z,N) */
11541 /* can be optimized iff WREG contains a known literal (0x100 - 0x1FF) */
11542 if (pci->pcop->type == PO_LITERAL) {
11544 lit = (unsigned char) PCOL(pci->pcop)->lit;
11545 val = defmapCurr (list, SPO_WREG, pc);
11546 if (val) vallit = litFromValnum (val->in_val);
11547 if (vallit != -1) {
11548 /* xxxLW <literal>, WREG contains a known literal */
11549 fprintf (stderr, "%s 0x%02x, WREG: 0x%x\n", pci->mnemonic, lit, vallit);
11550 if (pci->op == POC_ANDLW) {
11552 } else if (pci->op == POC_IORLW) {
11554 } else if (pci->op == POC_XORLW) {
11557 assert (0 && "invalid operation");
11559 if (vallit == lit) {
11560 //fprintf (stderr, "%s: W already set up correctly (%x = val %x)\n", pci->mnemonic, vallit, val->in_val);
11561 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant ANDLW/IORLW/XORLW removed");
11563 defmapUpdate (list, SPO_WREG, pc, valnumFromLit (lit));
11570 /* check if old value matches new value */
11573 assert (pci->pcop->type == PO_LITERAL);
11575 lit = PCOL(pci->pcop)->lit;
11577 val = defmapCurr (list, pic16_fsrsym_idx[lit][0], pc);
11579 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11580 fprintf (stderr, "FSR%dL already set up correctly at %p (%x)\n", lit, pc, val->val);
11582 /* cannot remove this LFSR */
11586 val = defmapCurr (list, pic16_fsrsym_idx[lit][1], pc);
11587 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11588 fprintf (stderr, "FSR%dH already set up correctly at %p (%x)\n", lit, pc, val->val);
11594 pic16_safepCodeRemove (pc, "=DF= redundant LFSR removed");
11599 case POC_MOVWF: /* does not touch flags */
11600 /* find value of WREG */
11601 val = defmapCurr (list, SPO_WREG, pc);
11602 oldval = defmapCurr (list, sym1, pc);
11603 if (val) lit = litFromValnum (val->in_val);
11605 //fprintf (stderr, "MOVWF: lit: %i (%x, %x)\n", lit, lit, val->in_val);
11607 if ((lit == 0 || lit == 0x0ff) && !pic16_isAlive (SPO_STATUS, pc)) {
11608 /* might replace with CLRF/SETF (will possibly make previous MOVLW 0x00/0xff unneccessary --> dead code elimination) */
11609 //fprintf (stderr, "replacing MOVWF with CLRF/SETF\n");
11611 newpc = pic16_newpCode (POC_CLRF, pic16_pCodeOpCopy (pci->pcop));
11613 assert (lit == 0x0ff);
11614 newpc = pic16_newpCode (POC_SETF, pic16_pCodeOpCopy (pci->pcop));
11616 if (pic16_debug_verbose || pic16_pcode_verbose) pic16_InsertCommentAfter (pc->prev, "=DF= MOVWF: replaced by CLRF/SETF");
11617 pic16_pCodeReplace (pc, newpc);
11618 defmapReplaceSymRef (pc, SPO_WREG, 0, 1);
11619 pic16_fixDefmap (pc, newpc);
11622 /* This breaks the defmap chain's references to pCodes... fix it! */
11623 if (!val->prev) PCI(pc)->pcflow->defmap = val->next;
11624 if (!val->acc.access.isWrite) {
11625 deleteDefmap (val); // delete reference to WREG as in value
11628 val->acc.access.isRead = 0; // delete reference to WREG as in value
11630 oldval = PCI(pc)->pcflow->defmap;
11632 if (oldval->pc == pc) oldval->pc = newpc;
11633 oldval = oldval->next;
11635 } else if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11636 //fprintf (stderr, "MOVWF: F (%s) already set up correctly (%x) at %p\n", strFromSym (sym1), oldval->in_val, pc);
11637 pic16_safepCodeRemove (pc, "=DF= redundant MOVWF removed");
11639 if (val) defmapUpdate (list, sym1, pc, val->in_val);
11642 case POC_MOVFW: /* modifies STATUS (Z,N) */
11643 /* find value of REG */
11644 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11645 val = defmapCurr (list, sym1, pc);
11646 oldval = defmapCurr (list, SPO_WREG, pc);
11647 if (val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11648 //fprintf (stderr, "MOVFW: W already set up correctly (%x) at %p\n", oldval->in_val, pc);
11649 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant MOVFW removed");
11651 if (val) defmapUpdate (list, SPO_WREG, pc, val->in_val);
11655 case POC_MOVFF: /* does not touch STATUS */
11656 /* find value of REG */
11657 val = defmapCurr (list, sym1, pc);
11658 oldval = defmapCurr (list, sym2, pc);
11659 if (val) lit = litFromValnum (val->in_val);
11662 if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && !pic16_isAlive (SPO_STATUS, pc)) {
11663 //pc->print (stderr, pc); fprintf (stderr, "lit: %d (%x, %x)\n", lit, lit, val->in_val);
11665 newpc = pic16_newpCode (POC_CLRF, PCOR2(pci->pcop)->pcop2);
11666 } else if (lit == 0x00ff) {
11667 newpc = pic16_newpCode (POC_SETF, PCOR2(pci->pcop)->pcop2);
11672 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: replaced by CRLF/SETF");
11673 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11674 pic16_pCodeReplace (pc, newpc);
11675 defmapReplaceSymRef (pc, sym1, 0, 1);
11676 pic16_fixDefmap (pc, newpc);
11678 break; // do not process instruction as MOVFF...
11680 } else if (!isSpecial1 && !isSpecial2 && pic16_regIsLocal (reg1) && pic16_regIsLocal (reg2)) {
11681 if (val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11682 //fprintf (stderr, "MOVFF: F2 (%s) already set up correctly (%x) at %p\n", strFromSym (sym2), oldval->in_val, pc);
11683 pic16_safepCodeRemove (pc, "=DF= redundant MOVFF removed");
11685 if (!pic16_isAlive (sym1, pc)) {
11686 defmap_t *copy = NULL;
11687 /* If there is another symbol S storing sym1's value we should assign from S thus shortening the liferange of sym1.
11688 * This should help eliminate
11690 * <do something not changing A or using B>
11692 * <B is not alive anymore>
11694 * <do something not changing A or using B>
11698 /* scan defmap for symbols storing sym1's value */
11699 while (oldval && (oldval->pc == pc || oldval->in_val != val->in_val)) oldval = oldval->next;
11700 if (oldval && (oldval->sym != sym1) && defmapFindAll (oldval->sym, pc, ©) == 1) {
11701 /* unique reaching definition for sym found */
11702 if (copy->val && copy->val == val->in_val) {
11703 //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);
11704 if (copy->sym == SPO_WREG) {
11705 newpc = pic16_newpCode (POC_MOVWF, pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2));
11707 newpc = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
11708 // /*TODO: change to copy->pc's out symbol*/pic16_pCodeOpCopy (pci->pcop),
11709 pic16_pCodeOpCopy (PCI(copy->pc)->pcop),
11710 pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2)));
11712 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: SRC op %s replaced by %s", strFromSym(sym1), strFromSym(copy->sym));
11713 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11714 pic16_pCodeReplace (pc, newpc);
11715 assert (val->sym == sym1 && val->acc.access.isRead && !val->acc.access.isWrite);
11716 defmapReplaceSymRef (pc, sym1, copy->sym, 1);
11717 pic16_fixDefmap (pc, newpc);
11721 deleteDefmapChain (©);
11724 if (val) defmapUpdate (list, sym2, pc, val->in_val);
11729 /* cannot optimize */
11734 static void pic16_destructDF (pBlock *pb) {
11737 /* remove old defmaps */
11738 pc = pic16_findNextInstruction (pb->pcHead);
11740 next = pic16_findNextInstruction (pc->next);
11742 assert (isPCI(pc) || isPCAD(pc));
11743 assert (PCI(pc)->pcflow);
11744 deleteDefmapChain (&PCI(pc)->pcflow->defmap);
11745 deleteDefmapChain (&PCI(pc)->pcflow->in_vals);
11746 deleteDefmapChain (&PCI(pc)->pcflow->out_vals);
11751 if (defmap_free || defmap_free_count) {
11752 //fprintf (stderr, "released defmaps: %u -- freeing up memory\n", defmap_free_count);
11753 freeDefmap (&defmap_free);
11754 defmap_free_count = 0;
11758 /* Checks whether a pBlock contains ASMDIRs. */
11759 static int pic16_pBlockHasAsmdirs (pBlock *pb) {
11762 pc = pic16_findNextInstruction (pb->pcHead);
11764 if (isPCAD(pc)) return 1;
11766 pc = pic16_findNextInstruction (pc->next);
11769 /* no PCADs found */
11774 /* Remove MOVFF r0x??, POSTDEC1 and MOVFF PREINC1, r0x?? for otherwise unused registers. */
11775 static int pic16_removeUnusedRegistersDF () {
11778 regs *reg1, *reg2, *reg3;
11779 set *seenRegs = NULL;
11781 int islocal, change = 0;
11784 if (!the_pFile || !the_pFile->pbHead) return 0;
11786 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
11787 //fprintf (stderr, "%s: examining function %s\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11789 /* find set of using pCodes per register */
11790 for (pc = pic16_findNextInstruction (pb->pcHead); pc;
11791 pc = pic16_findNextInstruction(pc->next)) {
11793 cond = PCI(pc)->inCond | PCI(pc)->outCond;
11794 reg1 = reg2 = NULL;
11795 if (cond & PCC_REGISTER) reg1 = pic16_getRegFromInstruction (pc);
11796 if (cond & PCC_REGISTER2) reg2 = pic16_getRegFromInstruction2 (pc);
11799 if (!isinSet (seenRegs, reg1)) reg1->reglives.usedpCodes = NULL;
11800 addSetIfnotP (&seenRegs, reg1);
11801 addSetIfnotP (®1->reglives.usedpCodes, pc);
11804 if (!isinSet (seenRegs, reg2)) reg2->reglives.usedpCodes = NULL;
11805 addSetIfnotP (&seenRegs, reg2);
11806 addSetIfnotP (®2->reglives.usedpCodes, pc);
11810 for (reg1 = setFirstItem (seenRegs); reg1; reg1 = setNextItem (seenRegs)) {
11811 /* may not use pic16_regIsLocal() here -- in interrupt routines
11812 * WREG, PRODx, FSR0x must be saved */
11813 islocal = (reg1->isLocal || reg1->rIdx == pic16_framepnt_lo->rIdx || reg1->rIdx == pic16_framepnt_hi->rIdx);
11814 if (islocal && elementsInSet (reg1->reglives.usedpCodes) == 2) {
11816 for (i=0; i < 2; i++) {
11817 pc = (pCode *) indexSet(reg1->reglives.usedpCodes, i);
11818 if (!pc2) pc2 = pc;
11819 if (!isPCI(pc) || !PCI(pc)->op == POC_MOVFF) continue;
11820 reg2 = pic16_getRegFromInstruction (pc);
11821 reg3 = pic16_getRegFromInstruction2 (pc);
11823 || (reg2->rIdx != pic16_stack_preinc->rIdx
11824 && reg3->rIdx != pic16_stack_postdec->rIdx)) break;
11826 /* both pCodes are MOVFF R,POSTDEC1 / MOVFF PREINC1,R */
11827 //fprintf (stderr, "%s: removing local register %s from %s\n", __FUNCTION__, reg1->name, pic16_pBlockGetFunctionName (pb));
11828 pic16_safepCodeRemove (pc, "removed unused local reg IN");
11829 pic16_safepCodeRemove (pc2, "removed unused local reg OUT");
11833 deleteSet (®1->reglives.usedpCodes);
11836 deleteSet (&seenRegs);
11843 /* Set up pCodeFlow's defmap_ts.
11844 * Needs correctly set up to/from fields. */
11845 static void pic16_createDF (pBlock *pb) {
11849 //fprintf (stderr, "creating DF for pb %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
11851 pic16_destructDF (pb);
11853 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
11854 if (pic16_pBlockHasAsmdirs (pb)) {
11855 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
11859 /* integrity check -- we need to reach all flows to guarantee
11860 * correct data flow analysis (reaching definitions, aliveness) */
11862 if (!verifyAllFlowsReachable (pb)) {
11863 fprintf (stderr, "not all flows reachable -- aborting dataflow analysis for %s!\n", pic16_pBlockGetFunctionName (pb));
11868 /* establish new defmaps */
11869 pc = pic16_findNextInstruction (pb->pcHead);
11871 next = pic16_findNextInstruction (pc->next);
11873 assert (PCI(pc)->pcflow);
11874 PCI(pc)->pcflow->defmap = createDefmap (pc, PCI(pc)->pcflow->defmap);
11879 //fprintf (stderr, "%s: creating reaching definitions...\n", __FUNCTION__);
11880 createReachingDefinitions (pb);
11883 /* assign better valnums */
11884 //fprintf (stderr, "assigning valnums for pb %p\n", pb);
11885 pc = pic16_findNextInstruction (pb->pcHead);
11887 next = pic16_findNextInstruction (pc->next);
11889 assert (PCI(pc)->pcflow);
11890 assignValnums (pc);
11897 /* remove dead pCodes */
11898 //fprintf (stderr, "removing dead pCodes in %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
11901 pc = pic16_findNextInstruction (pb->pcHead);
11903 next = pic16_findNextInstruction (pc->next);
11905 if (isPCI(pc) && !isPCI_BRANCH(pc) && !pic16_pCodeIsAlive (pc)) {
11906 change += pic16_safepCodeRemove (pc, "=DF= removed dead pCode");
11916 /* ======================================================================= */
11917 /* === DEPRECATED CONTROL FLOW CREATION ROUTINES ========================= */
11918 /* ======================================================================= */
11922 /* connect pCode f anf t via their to/from pBranches */
11923 static void pic16_pCodeLink (pCode *f, pCode *t) {
11925 pCodeInstruction *_f, *_t;
11927 if (!f || !t) return;
11930 fprintf (stderr, "linking:\n");
11931 f->print(stderr, f);
11932 f->print(stderr, t);
11935 assert (isPCI(f) || isPCAD(f));
11936 assert (isPCI(t) || isPCAD(t));
11940 /* define t to be CF successor of f */
11941 br = Safe_malloc (sizeof (pBranch));
11944 _f->to = pic16_pBranchAppend (_f->to, br);
11946 /* define f to be CF predecessor of t */
11947 br = Safe_malloc (sizeof (pBranch));
11950 _t->from = pic16_pBranchAppend (_t->from, br);
11952 /* also update pcflow information */
11953 if (_f->pcflow && _t->pcflow && _f->pcflow != _t->pcflow) {
11954 //fprintf (stderr, "creating flow %p --> %p\n", _f->pcflow, _t->pcflow);
11955 LinkFlow_pCode (_f, _t);
11959 static void pic16_destructCF (pBlock *pb) {
11963 /* remove old CF information */
11967 while (PCI(pc)->to) {
11968 br = PCI(pc)->to->next;
11969 Safe_free (PCI(pc)->to);
11972 while (PCI(pc)->from) {
11973 br = PCI(pc)->from->next;
11974 Safe_free (PCI(pc)->from);
11975 PCI(pc)->from = br;
11977 } else if (isPCFL(pc)) {
11978 deleteSet (&PCFL(pc)->to);
11979 deleteSet (&PCFL(pc)->from);
11987 /* Set up pCodeInstruction's to and from pBranches. */
11988 static void pic16_createCF (pBlock *pb) {
11990 pCode *next, *dest;
11993 //fprintf (stderr, "creating CF for %p\n", pb);
11995 pic16_destructCF (pb);
11997 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
11998 if (pic16_pBlockHasAsmdirs (pb)) {
11999 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
12003 pc = pic16_findNextInstruction(pb->pcHead);
12005 next = pic16_findNextInstruction(pc->next);
12006 if (isPCI_SKIP(pc)) {
12007 pic16_pCodeLink(pc, next);
12008 pic16_pCodeLink(pc, pic16_findNextInstruction(next->next));
12009 } else if (isPCI_BRANCH(pc)) {
12010 // Bcc, BRA, CALL, GOTO
12011 if (PCI(pc)->pcop) {
12012 switch (PCI(pc)->pcop->type) {
12014 label = PCOLAB(PCI(pc)->pcop)->pcop.name;
12015 dest = findLabelinpBlock (pc->pb, PCOLAB(PCI(pc)->pcop));
12019 /* needed for GOTO ___irq_handler */
12020 label = PCI(pc)->pcop->name;
12025 assert (0 && "invalid label format");
12033 switch (PCI(pc)->op) {
12036 if (dest != NULL) {
12037 pic16_pCodeLink(pc, dest);
12039 //fprintf (stderr, "jump target \"%s\" not found!\n", label);
12045 pic16_pCodeLink(pc, next);
12055 if (dest != NULL) {
12056 pic16_pCodeLink(pc, dest);
12058 //fprintf (stderr, "jump target \"%s\"not found!\n", label);
12060 pic16_pCodeLink(pc, next);
12063 fprintf (stderr, "BRANCH instruction: %s\n", PCI(pc)->mnemonic);
12064 assert (0 && "unhandled branch instruction");
12068 pic16_pCodeLink (pc, next);
12075 /* ======================================================================== */
12076 /* === VCG DUMPER ROUTINES ================================================ */
12077 /* ======================================================================== */
12078 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
12079 hTab *dumpedNodes = NULL;
12081 /** Dump VCG header into of. */
12082 static void pic16_vcg_init (FILE *of) {
12083 /* graph defaults */
12084 fprintf (of, "graph:{\n");
12085 fprintf (of, "title:\"graph1\"\n");
12086 fprintf (of, "label:\"graph1\"\n");
12087 fprintf (of, "color:white\n");
12088 fprintf (of, "textcolor:black\n");
12089 fprintf (of, "bordercolor:black\n");
12090 fprintf (of, "borderwidth:1\n");
12091 fprintf (of, "textmode:center\n");
12093 fprintf (of, "layoutalgorithm:dfs\n");
12094 fprintf (of, "late_edge_labels:yes\n");
12095 fprintf (of, "display_edge_labels:yes\n");
12096 fprintf (of, "dirty_edge_labels:yes\n");
12097 fprintf (of, "finetuning:yes\n");
12098 fprintf (of, "ignoresingles:no\n");
12099 fprintf (of, "straight_phase:yes\n");
12100 fprintf (of, "priority_phase:yes\n");
12101 fprintf (of, "manhattan_edges:yes\n");
12102 fprintf (of, "smanhattan_edges:no\n");
12103 fprintf (of, "nearedges:no\n");
12104 fprintf (of, "node_alignment:center\n"); // bottom|top|center
12105 fprintf (of, "port_sharing:no\n");
12106 fprintf (of, "arrowmode:free\n"); // fixed|free
12107 fprintf (of, "crossingphase2:yes\n");
12108 fprintf (of, "crossingoptimization:yes\n");
12109 fprintf (of, "edges:yes\n");
12110 fprintf (of, "nodes:yes\n");
12111 fprintf (of, "splines:no\n");
12113 /* node defaults */
12114 fprintf (of, "node.color:lightyellow\n");
12115 fprintf (of, "node.textcolor:black\n");
12116 fprintf (of, "node.textmode:center\n");
12117 fprintf (of, "node.shape:box\n");
12118 fprintf (of, "node.bordercolor:black\n");
12119 fprintf (of, "node.borderwidth:1\n");
12121 /* edge defaults */
12122 fprintf (of, "edge.textcolor:black\n");
12123 fprintf (of, "edge.color:black\n");
12124 fprintf (of, "edge.thickness:1\n");
12125 fprintf (of, "edge.arrowcolor:black\n");
12126 fprintf (of, "edge.backarrowcolor:black\n");
12127 fprintf (of, "edge.arrowsize:15\n");
12128 fprintf (of, "edge.backarrowsize:15\n");
12129 fprintf (of, "edge.arrowstyle:line\n"); // none|solid|line
12130 fprintf (of, "edge.backarrowstyle:none\n"); // none|solid|line
12131 fprintf (of, "edge.linestyle:continuous\n"); // continuous|solid|dotted|dashed|invisible
12133 fprintf (of, "\n");
12135 /* prepare data structures */
12137 hTabDeleteAll (dumpedNodes);
12138 dumpedNodes = NULL;
12140 dumpedNodes = newHashTable (128);
12143 /** Dump VCG footer into of. */
12144 static void pic16_vcg_close (FILE *of) {
12145 fprintf (of, "}\n");
12148 #define BUF_SIZE 128
12149 #define pcTitle(pc) (SNPRINTF (buf, BUF_SIZE, "n_%p, %p/%u", PCODE(pc), isPCI(pc) ? PCI(pc)->pcflow : NULL, PCODE(pc)->seq), &buf[0])
12152 static int ptrcmp (const void *p1, const void *p2) {
12157 /** Dump a pCode node as VCG to of. */
12158 static void pic16_vcg_dumpnode (pCode *pc, FILE *of) {
12159 char buf[BUF_SIZE];
12161 if (hTabFindByKey (dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, ptrcmp)) {
12165 hTabAddItemLong (&dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, pc);
12166 //fprintf (stderr, "dumping %p\n", pc);
12168 /* only dump pCodeInstructions and Flow nodes */
12169 if (!isPCI(pc) && !isPCAD(pc) && !isPCFL(pc)) return;
12172 fprintf (of, "node:{");
12173 fprintf (of, "title:\"%s\" ", pcTitle(pc));
12174 fprintf (of, "label:\"%s\n", pcTitle(pc));
12176 fprintf (of, "<PCFLOW>");
12177 } else if (isPCI(pc) || isPCAD(pc)) {
12178 pc->print (of, pc);
12180 fprintf (of, "<!PCI>");
12182 fprintf (of, "\" ");
12183 fprintf (of, "}\n");
12185 if (1 && isPCFL(pc)) {
12186 defmap_t *map, *prev;
12188 map = PCFL(pc)->defmap;
12191 if (map->sym != 0) {
12194 /* emit definition node */
12195 fprintf (of, "node:{title:\"%s_def%u\" ", pcTitle(pc), i);
12196 fprintf (of, "label:\"");
12200 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));
12203 } while (map && prev->pc == map->pc);
12206 fprintf (of, "\" ");
12208 fprintf (of, "color:green ");
12209 fprintf (of, "}\n");
12211 /* emit edge to previous definition */
12212 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12214 fprintf (of, "targetname:\"%s\" ", pcTitle(pc));
12216 fprintf (of, "targetname:\"%s_def%u\" ", pcTitle(pc), i-1);
12218 fprintf (of, "color:green ");
12219 fprintf (of, "}\n");
12222 pic16_vcg_dumpnode (map->pc, of);
12223 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12224 fprintf (of, "targetname:\"%s\" linestyle:dashed color:lightgreen}\n", pcTitle(map->pc));
12231 /* emit additional nodes (e.g. operands) */
12234 /** Dump a pCode's edges (control flow/data flow) as VCG to of. */
12235 static void pic16_vcg_dumpedges (pCode *pc, FILE *of) {
12236 char buf[BUF_SIZE];
12237 pCodeInstruction *pci;
12241 if (1 && isPCFL(pc)) {
12242 /* emit edges to flow successors */
12244 //fprintf (stderr, "PCFLOWe @ %p\n", pc);
12245 pcfl = setFirstItem (PCFL(pc)->to);
12247 pcfl = ((pCodeFlowLink *) (pcfl))->pcflow;
12248 pic16_vcg_dumpnode (pc, of);
12249 pic16_vcg_dumpnode ((pCode *) pcfl, of);
12250 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12251 fprintf (of, "targetname:\"%s\" color:lightred linestyle:dashed}\n", pcTitle(pcfl));
12252 pcfl = setNextItem (PCFL(pc)->to);
12256 if (!isPCI(pc) && !isPCAD(pc)) return;
12260 /* emit control flow edges (forward only) */
12264 pic16_vcg_dumpnode (curr->pc, of);
12265 fprintf (of, "edge:{");
12266 fprintf (of, "sourcename:\"%s\" ", pcTitle(pc));
12267 fprintf (of, "targetname:\"%s\" ", pcTitle(curr->pc));
12268 fprintf (of, "color:red ");
12269 fprintf (of, "}\n");
12274 /* dump "flow" edge (link pCode according to pBlock order) */
12277 pcnext = pic16_findNextInstruction (pc->next);
12279 pic16_vcg_dumpnode (pcnext, of);
12280 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12281 fprintf (of, "targetname:\"%s\" color:red linestyle:solid}\n", pcTitle(pcnext));
12289 pic16_vcg_dumpnode (&pci->pcflow->pc, of);
12290 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12291 fprintf (of, "targetname:\"%s\" color:lightblue linestyle:dashed}\n", pcTitle (pci->pcflow));
12295 /* emit data flow edges (backward only) */
12296 /* TODO: gather data flow information... */
12299 static void pic16_vcg_dump (FILE *of, pBlock *pb) {
12302 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
12303 if (pic16_pBlockHasAsmdirs (pb)) {
12304 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
12308 for (pc=pb->pcHead; pc; pc = pc->next) {
12309 pic16_vcg_dumpnode (pc, of);
12312 for (pc=pb->pcHead; pc; pc = pc->next) {
12313 pic16_vcg_dumpedges (pc, of);
12317 static void pic16_vcg_dump_default (pBlock *pb) {
12319 char buf[BUF_SIZE];
12322 /* get function name */
12324 while (pc && !isPCF(pc)) pc = pc->next;
12326 SNPRINTF (buf, BUF_SIZE, "%s_%s.vcg", PCF(pc)->modname, PCF(pc)->fname);
12328 SNPRINTF (buf, BUF_SIZE, "pb_%p.vcg", pb);
12331 //fprintf (stderr, "now dumping %s\n", buf);
12332 of = fopen (buf, "w");
12333 pic16_vcg_init (of);
12334 pic16_vcg_dump (of, pb);
12335 pic16_vcg_close (of);
12340 /*** END of helpers for pCode dataflow optimizations ***/
projects / fw / sdcc / blob