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(unsigned 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(unsigned 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((unsigned char)*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((unsigned char)*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)
4249 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
4254 r = pic16_regWithIdx(rIdx);
4256 r = pic16_allocWithIdx(rIdx);
4258 r = pic16_findFreeReg(REG_GPR);
4261 fprintf(stderr, "%s:%d Could not find a free GPR register\n",
4262 __FUNCTION__, __LINE__);
4267 PCOR(pcop)->rIdx = rIdx;
4269 pcop->type = PCOR(pcop)->r->pc_type;
4274 pCodeOp *pic16_newpCodeOpRegNotVect(bitVect *bv)
4279 pcop = Safe_calloc(1, sizeof(pCodeOpReg));
4282 r = pic16_findFreeReg(REG_GPR);
4285 if(!bitVectBitValue(bv, r->rIdx)) {
4287 PCOR(pcop)->rIdx = r->rIdx;
4288 pcop->type = r->pc_type;
4292 r = pic16_findFreeRegNext(REG_GPR, r);
4300 pCodeOp *pic16_newpCodeOpRegFromStr(char *name)
4305 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
4306 PCOR(pcop)->r = r = pic16_allocRegByName(name, 1, NULL);
4307 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
4308 pcop->type = PCOR(pcop)->r->pc_type;
4309 pcop->name = PCOR(pcop)->r->name;
4311 // if(pic16_pcode_verbose) {
4312 // fprintf(stderr, "%s:%d %s allocates register %s rIdx:0x%02x\n",
4313 // __FILE__, __LINE__, __FUNCTION__, r->name, r->rIdx);
4319 /*-----------------------------------------------------------------*/
4320 /*-----------------------------------------------------------------*/
4321 pCodeOp *pic16_newpCodeOpOpt(OPT_TYPE type, char *key)
4325 pcop = Safe_calloc(1, sizeof(pCodeOpOpt));
4328 pcop->key = Safe_strdup( key );
4330 return (PCOP(pcop));
4333 /*-----------------------------------------------------------------*/
4334 /*-----------------------------------------------------------------*/
4335 pCodeOp *pic16_newpCodeOpLocalRegs(LR_TYPE type)
4337 pCodeOpLocalReg *pcop;
4339 pcop = Safe_calloc(1, sizeof(pCodeOpLocalReg));
4343 return (PCOP(pcop));
4347 /*-----------------------------------------------------------------*/
4348 /*-----------------------------------------------------------------*/
4350 pCodeOp *pic16_newpCodeOp(char *name, PIC_OPTYPE type)
4357 pcop = pic16_newpCodeOpBit(name, -1,0, type);
4361 pcop = pic16_newpCodeOpLit(-1);
4365 pcop = pic16_newpCodeOpLabel(NULL,-1);
4368 pcop = pic16_newpCodeOpReg(-1);
4371 case PO_GPR_REGISTER:
4373 pcop = pic16_newpCodeOpRegFromStr(name);
4375 pcop = pic16_newpCodeOpReg(-1);
4379 pcop = Safe_calloc(1,sizeof(pCodeOp) );
4382 pcop->name = Safe_strdup(name);
4390 /* This is a multiple of two as gpasm pads DB directives to even length,
4391 * thus the data would be interleaved with \0 bytes...
4392 * This is a multiple of three in order to have arrays of 3-byte pointers
4393 * continuously in memory (without 0-padding at the lines' end).
4394 * This is rather 12 than 6 in order not to split up 4-byte data types
4395 * in arrays right in the middle of a 4-byte word. */
4396 #define DB_ITEMS_PER_LINE 12
4398 typedef struct DBdata
4405 static int DBd_init = -1;
4407 /*-----------------------------------------------------------------*/
4408 /* Initialiase "DB" data buffer */
4409 /*-----------------------------------------------------------------*/
4410 void pic16_initDB(void)
4416 /*-----------------------------------------------------------------*/
4417 /* Flush pending "DB" data to a pBlock */
4419 /* ptype - type of p pointer, 'f' file pointer, 'p' pBlock pointer */
4420 /*-----------------------------------------------------------------*/
4421 void pic16_flushDB(char ptype, void *p)
4425 pic16_addpCode2pBlock(((pBlock *)p),pic16_newpCodeAsmDir("DB", "%s", DBd.buffer));
4428 fprintf(((FILE *)p), "\tdb\t%s\n", DBd.buffer);
4431 fprintf(stderr, "PIC16 port error: could not emit initial value data\n");
4435 DBd.buffer[0] = '\0';
4440 /*-----------------------------------------------------------------*/
4441 /* Add "DB" directives to a pBlock */
4442 /*-----------------------------------------------------------------*/
4443 void pic16_emitDB(char c, char ptype, void *p)
4448 // we need to initialize
4451 DBd.buffer[0] = '\0';
4454 l = strlen(DBd.buffer);
4455 sprintf(DBd.buffer+l,"%s0x%02x", (DBd.count>0?", ":""), c & 0xff);
4457 // fprintf(stderr, "%s:%d DBbuffer: '%s'\n", __FILE__, __LINE__, DBd.buffer);
4460 if (DBd.count>= DB_ITEMS_PER_LINE)
4461 pic16_flushDB(ptype, p);
4464 void pic16_emitDS(char *s, char ptype, void *p)
4469 // we need to initialize
4472 DBd.buffer[0] = '\0';
4475 l = strlen(DBd.buffer);
4476 sprintf(DBd.buffer+l,"%s%s", (DBd.count>0?", ":""), s);
4478 // fprintf(stderr, "%s:%d DBbuffer: '%s'\n", __FILE__, __LINE__, DBd.buffer);
4480 DBd.count++; //=strlen(s);
4481 if (DBd.count>=DB_ITEMS_PER_LINE)
4482 pic16_flushDB(ptype, p);
4486 /*-----------------------------------------------------------------*/
4487 /*-----------------------------------------------------------------*/
4488 void pic16_pCodeConstString(char *name, char *value)
4492 static set *emittedSymbols = NULL;
4497 /* keep track of emitted symbols to avoid multiple definition of str_<nr> */
4498 if (emittedSymbols) {
4499 /* scan set for name */
4500 for (item = setFirstItem (emittedSymbols); item; item = setNextItem (emittedSymbols))
4502 if (!strcmp (item,name)) {
4503 //fprintf (stderr, "%s already emitted\n", name);
4508 addSet (&emittedSymbols, Safe_strdup (name));
4510 //fprintf(stderr, " %s %s %s\n",__FUNCTION__,name,value);
4512 pb = pic16_newpCodeChain(NULL, 'P',pic16_newpCodeCharP("; Starting pCode block"));
4514 pic16_addpBlock(pb);
4516 // sprintf(buffer,"; %s = ", name);
4517 // strcat(buffer, value);
4518 // fputs(buffer, stderr);
4520 // pic16_addpCode2pBlock(pb,pic16_newpCodeCharP(buffer));
4521 pic16_addpCode2pBlock(pb,pic16_newpCodeLabel(name,-1));
4524 pic16_emitDB(*value, 'p', (void *)pb);
4526 pic16_flushDB('p', (void *)pb);
4529 /*-----------------------------------------------------------------*/
4530 /*-----------------------------------------------------------------*/
4532 static void pCodeReadCodeTable(void)
4536 fprintf(stderr, " %s\n",__FUNCTION__);
4538 pb = pic16_newpCodeChain(NULL, 'P',pic16_newpCodeCharP("; Starting pCode block"));
4540 pic16_addpBlock(pb);
4542 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; ReadCodeTable - built in function"));
4543 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; Inputs: temp1,temp2 = code pointer"));
4544 pic16_addpCode2pBlock(pb,pic16_newpCodeCharP("; Outpus: W (from RETLW at temp2:temp1)"));
4545 pic16_addpCode2pBlock(pb,pic16_newpCodeLabel("ReadCodeTable:",-1));
4547 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVFW,pic16_newpCodeOpRegFromStr("temp2")));
4548 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVWF,pic16_newpCodeOpRegFromStr("PCLATH")));
4549 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVFW,pic16_newpCodeOpRegFromStr("temp1")));
4550 pic16_addpCode2pBlock(pb,pic16_newpCode(POC_MOVWF,pic16_newpCodeOpRegFromStr("PCL")));
4555 /*-----------------------------------------------------------------*/
4556 /* pic16_addpCode2pBlock - place the pCode into the pBlock linked list */
4557 /*-----------------------------------------------------------------*/
4558 void pic16_addpCode2pBlock(pBlock *pb, pCode *pc)
4565 /* If this is the first pcode to be added to a block that
4566 * was initialized with a NULL pcode, then go ahead and
4567 * make this pcode the head and tail */
4568 pb->pcHead = pb->pcTail = pc;
4571 pb->pcTail->next = pc;
4573 pc->prev = pb->pcTail;
4580 /*-----------------------------------------------------------------*/
4581 /* pic16_addpBlock - place a pBlock into the pFile */
4582 /*-----------------------------------------------------------------*/
4583 void pic16_addpBlock(pBlock *pb)
4585 // fprintf(stderr," Adding pBlock: dbName =%c\n",getpBlock_dbName(pb));
4588 /* First time called, we'll pass through here. */
4589 //_ALLOC(the_pFile,sizeof(pFile));
4590 the_pFile = Safe_calloc(1,sizeof(pFile));
4591 the_pFile->pbHead = the_pFile->pbTail = pb;
4592 the_pFile->functions = NULL;
4596 the_pFile->pbTail->next = pb;
4597 pb->prev = the_pFile->pbTail;
4599 the_pFile->pbTail = pb;
4602 /*-----------------------------------------------------------------*/
4603 /* removepBlock - remove a pBlock from the pFile */
4604 /*-----------------------------------------------------------------*/
4605 static void removepBlock(pBlock *pb)
4613 //fprintf(stderr," Removing pBlock: dbName =%c\n",getpBlock_dbName(pb));
4615 for(pbs = the_pFile->pbHead; pbs; pbs = pbs->next) {
4618 if(pbs == the_pFile->pbHead)
4619 the_pFile->pbHead = pbs->next;
4621 if (pbs == the_pFile->pbTail)
4622 the_pFile->pbTail = pbs->prev;
4625 pbs->next->prev = pbs->prev;
4628 pbs->prev->next = pbs->next;
4635 fprintf(stderr, "Warning: call to %s:%s didn't find pBlock\n",__FILE__,__FUNCTION__);
4639 /*-----------------------------------------------------------------*/
4640 /* printpCode - write the contents of a pCode to a file */
4641 /*-----------------------------------------------------------------*/
4642 static void printpCode(FILE *of, pCode *pc)
4653 fprintf(of,"warning - unable to print pCode\n");
4656 /*-----------------------------------------------------------------*/
4657 /* pic16_printpBlock - write the contents of a pBlock to a file */
4658 /*-----------------------------------------------------------------*/
4659 void pic16_printpBlock(FILE *of, pBlock *pb)
4667 for(pc = pb->pcHead; pc; pc = pc->next) {
4668 if(isPCF(pc) && PCF(pc)->fname) {
4669 fprintf(of, "S_%s_%s\tcode", PCF(pc)->modname, PCF(pc)->fname);
4670 if(pb->dbName == 'A') {
4672 for(ab=setFirstItem(absSymSet); ab; ab=setNextItem(absSymSet)) {
4673 // fprintf(stderr, "%s:%d testing %s <-> %s\n", __FILE__, __LINE__, PCF(pc)->fname, ab->name);
4674 if(!strcmp(ab->name, PCF(pc)->fname)) {
4675 // fprintf(stderr, "%s:%d address = %x\n", __FILE__, __LINE__, ab->address);
4676 if(ab->address != -1)
4677 fprintf(of, "\t0X%06X", ab->address);
4688 /*-----------------------------------------------------------------*/
4690 /* pCode processing */
4694 /*-----------------------------------------------------------------*/
4695 pCode * pic16_findNextInstruction(pCode *pci);
4696 pCode * pic16_findPrevInstruction(pCode *pci);
4698 void pic16_unlinkpCode(pCode *pc)
4704 fprintf(stderr,"Unlinking: ");
4705 printpCode(stderr, pc);
4708 pc->prev->next = pc->next;
4710 pc->next->prev = pc->prev;
4712 /* move C source line down (or up) */
4713 if (isPCI(pc) && PCI(pc)->cline) {
4714 prev = pic16_findNextInstruction (pc->next);
4715 if (prev && isPCI(prev) && !PCI(prev)->cline) {
4716 PCI(prev)->cline = PCI(pc)->cline;
4718 prev = pic16_findPrevInstruction (pc->prev);
4719 if (prev && isPCI(prev) && !PCI(prev)->cline)
4720 PCI(prev)->cline = PCI(pc)->cline;
4723 pc->prev = pc->next = NULL;
4727 /*-----------------------------------------------------------------*/
4728 /*-----------------------------------------------------------------*/
4730 static void genericDestruct(pCode *pc)
4733 pic16_unlinkpCode(pc);
4736 /* For instructions, tell the register (if there's one used)
4737 * that it's no longer needed */
4738 regs *reg = pic16_getRegFromInstruction(pc);
4740 deleteSetItem (&(reg->reglives.usedpCodes),pc);
4742 if(PCI(pc)->is2MemOp) {
4743 reg = pic16_getRegFromInstruction2(pc);
4745 deleteSetItem(&(reg->reglives.usedpCodes), pc);
4749 /* Instead of deleting the memory used by this pCode, mark
4750 * the object as bad so that if there's a pointer to this pCode
4751 * dangling around somewhere then (hopefully) when the type is
4752 * checked we'll catch it.
4756 pic16_addpCode2pBlock(pb_dead_pcodes, pc);
4762 void DEBUGpic16_emitcode (char *inst,char *fmt, ...);
4763 /*-----------------------------------------------------------------*/
4764 /*-----------------------------------------------------------------*/
4765 /* modifiers for constant immediate */
4766 const char *immdmod[3]={"LOW", "HIGH", "UPPER"};
4768 char *pic16_get_op(pCodeOp *pcop,char *buffer, size_t size)
4773 int use_buffer = 1; // copy the string to the passed buffer pointer
4778 use_buffer = 0; // Don't bother copying the string to the buffer.
4782 switch(pcop->type) {
4790 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
4793 return PCOR(pcop)->r->name;
4796 r = pic16_regWithIdx(PCOR(pcop)->r->rIdx);
4798 SAFE_snprintf(&buffer,&size,"%s",r->name);
4805 if(PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
4806 if(PCOI(pcop)->index) {
4807 SAFE_snprintf(&s,&size, "%s(%s + %d)",
4808 immdmod[ PCOI(pcop)->offset ],
4812 SAFE_snprintf(&s,&size,"%s(%s)",
4813 immdmod[ PCOI(pcop)->offset ],
4817 if(PCOI(pcop)->index) {
4818 SAFE_snprintf(&s,&size, "%s(%s + %d)",
4823 SAFE_snprintf(&s,&size, "%s(%s)",
4830 case PO_GPR_REGISTER:
4833 // size = sizeof(buffer);
4834 if( PCOR(pcop)->instance) {
4835 SAFE_snprintf(&s,&size,"(%s + %d)",
4837 PCOR(pcop)->instance );
4839 SAFE_snprintf(&s,&size,"%s",pcop->name);
4844 if(PCORB(pcop)->subtype == PO_GPR_TEMP) {
4845 SAFE_snprintf(&s, &size, "%s", pcop->name);
4847 if(PCORB(pcop)->pcor.instance)
4848 SAFE_snprintf(&s, &size, "(%s + %d)", pcop->name, PCORB(pcop)->pcor.instance);
4850 SAFE_snprintf(&s, &size, "%s", pcop->name);
4857 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
4866 return "NO operand1";
4869 /*-----------------------------------------------------------------*/
4870 /* pic16_get_op2 - variant to support two memory operand commands */
4871 /*-----------------------------------------------------------------*/
4872 char *pic16_get_op2(pCodeOp *pcop,char *buffer, size_t size)
4877 int use_buffer = 1; // copy the string to the passed buffer pointer
4882 use_buffer = 0; // Don't bother copying the string to the buffer.
4886 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",
4887 __FUNCTION__, __LINE__, PCOR(PCOR2(pcop)->pcop2)->r->name, PCOR2(pcop)->pcop2->type,
4888 PO_DIR, PO_GPR_TEMP, PO_IMMEDIATE, PO_INDF0, PO_FSR0);
4892 switch(PCOR2(pcop)->pcop2->type) {
4900 SAFE_snprintf(&buffer,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4903 return PCOR(PCOR2(pcop)->pcop2)->r->name;
4906 r = pic16_regWithIdx(PCOR(PCOR2(pcop)->pcop2)->r->rIdx);
4909 SAFE_snprintf(&buffer,&size,"%s",r->name);
4920 if(PCOI(pcop)->_const) {
4921 if( PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
4922 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
4925 8 * PCOI(pcop)->offset );
4927 SAFE_snprintf(&s,&size,"LOW(%s+%d)",pcop->name,PCOI(pcop)->index);
4929 if( PCOI(pcop)->index) {
4930 SAFE_snprintf(&s,&size,"(%s + %d)",
4932 PCOI(pcop)->index );
4934 if(PCOI(pcop)->offset)
4935 SAFE_snprintf(&s,&size,"(%s >> %d)&0xff",pcop->name, 8*PCOI(pcop)->offset);
4937 SAFE_snprintf(&s,&size,"%s",pcop->name);
4944 if( PCOR(PCOR2(pcop)->pcop2)->instance) {
4945 SAFE_snprintf(&s,&size,"(%s + %d)",
4946 PCOR(PCOR2(pcop)->pcop2)->r->name,
4947 PCOR(PCOR2(pcop)->pcop2)->instance );
4949 SAFE_snprintf(&s,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4954 if(PCOR(PCOR2(pcop)->pcop2)->r->name) {
4956 SAFE_snprintf(&buffer,&size,"%s",PCOR(PCOR2(pcop)->pcop2)->r->name);
4959 return PCOR(PCOR2(pcop)->pcop2)->r->name;
4964 return "NO operand2";
4967 /*-----------------------------------------------------------------*/
4968 /*-----------------------------------------------------------------*/
4969 static char *pic16_get_op_from_instruction( pCodeInstruction *pcc)
4973 return pic16_get_op(pcc->pcop,NULL,0);
4975 /* gcc 3.2: warning: concatenation of string literals with __FUNCTION__ is deprecated
4976 * return ("ERROR Null: "__FUNCTION__);
4978 return ("ERROR Null: pic16_get_op_from_instruction");
4982 /*-----------------------------------------------------------------*/
4983 /*-----------------------------------------------------------------*/
4984 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
4987 fprintf(of,"pcodeopprint- not implemented\n");
4990 /*-----------------------------------------------------------------*/
4991 /* pic16_pCode2str - convert a pCode instruction to string */
4992 /*-----------------------------------------------------------------*/
4993 char *pic16_pCode2str(char *str, size_t size, pCode *pc)
4999 if(isPCI(pc) && (PCI(pc)->pci_magic != PCI_MAGIC)) {
5000 fprintf(stderr, "%s:%d: pCodeInstruction initialization error in instruction %s, magic is %x (defaut: %x)\n",
5001 __FILE__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pci_magic, PCI_MAGIC);
5009 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
5011 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
5013 if(PCI(pc)->is2MemOp) {
5014 SAFE_snprintf(&s,&size, "%s, %s",
5015 pic16_get_op(PCOP(PCI(pc)->pcop), NULL, 0),
5016 pic16_get_op2(PCOP(PCI(pc)->pcop), NULL, 0));
5020 if(PCI(pc)->is2LitOp) {
5021 SAFE_snprintf(&s,&size, "%s", PCOP(PCI(pc)->pcop)->name);
5025 if(PCI(pc)->isBitInst) {
5026 if(PCI(pc)->pcop->type != PO_GPR_BIT) {
5027 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
5028 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)",
5029 PCI(pc)->pcop->name ,
5030 PCI(pc)->pcop->name );
5032 SAFE_snprintf(&s,&size,"%s,%d", pic16_get_op_from_instruction(PCI(pc)),
5033 // (((pCodeOpRegBit *)(PCI(pc)->pcop))->pcor.instance),
5034 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit ));
5036 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
5037 SAFE_snprintf(&s,&size,"%s, %d", pic16_get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
5039 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", pic16_get_op_from_instruction(PCI(pc)));
5040 //PCI(pc)->pcop->t.bit );
5043 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
5044 if( PCI(pc)->num_ops == 3)
5045 SAFE_snprintf(&s,&size,"(%s >> 3),%c",pic16_get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
5047 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",pic16_get_op_from_instruction(PCI(pc)));
5052 SAFE_snprintf(&s,&size,"%s", pic16_get_op_from_instruction(PCI(pc)));
5055 if( PCI(pc)->num_ops == 3 || ((PCI(pc)->num_ops == 2) && (PCI(pc)->isAccess))) {
5056 if(PCI(pc)->num_ops == 3 && !PCI(pc)->isBitInst)
5057 SAFE_snprintf(&s,&size,", %c", ( (PCI(pc)->isModReg) ? 'F':'W'));
5059 r = pic16_getRegFromInstruction(pc);
5060 // fprintf(stderr, "%s:%d reg = %p\tname= %s, accessBank= %d\n",
5061 // __FUNCTION__, __LINE__, r, (r)?r->name:"<null>", (r)?r->accessBank:-1);
5063 if(PCI(pc)->isAccess) {
5064 static char *bank_spec[2][2] = {
5065 { "", ", ACCESS" }, /* gpasm uses access bank by default */
5066 { ", B", ", BANKED" }/* MPASM (should) use BANKED by default */
5069 SAFE_snprintf(&s,&size,"%s", bank_spec[(r && !r->accessBank) ? 1 : 0][pic16_mplab_comp ? 1 : 0]);
5078 /* assuming that comment ends with a \n */
5079 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
5083 SAFE_snprintf(&s,&size,"; info ==>");
5084 switch( PCINF(pc)->type ) {
5085 case INF_OPTIMIZATION:
5086 SAFE_snprintf(&s,&size, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5089 SAFE_snprintf(&s,&size, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5094 /* assuming that inline code ends with a \n */
5095 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
5099 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
5102 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
5105 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
5108 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
5111 // SAFE_snprintf(&s,&size,";#CSRC\t%s %d\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5112 SAFE_snprintf(&s,&size,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5113 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5116 if(PCAD(pc)->directive) {
5117 SAFE_snprintf(&s,&size,"\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5120 /* special case to handle inline labels without a tab */
5121 SAFE_snprintf(&s,&size,"%s\n", PCAD(pc)->arg);
5126 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
5134 /*-----------------------------------------------------------------*/
5135 /* genericPrint - the contents of a pCode to a file */
5136 /*-----------------------------------------------------------------*/
5137 static void genericPrint(FILE *of, pCode *pc)
5145 // fputs(((pCodeComment *)pc)->comment, of);
5146 fprintf(of,"; %s\n", ((pCodeComment *)pc)->comment);
5151 pBranch *pbl = PCI(pc)->label;
5152 while(pbl && pbl->pc) {
5153 if(pbl->pc->type == PC_LABEL)
5154 pCodePrintLabel(of, pbl->pc);
5159 if(pic16_pcode_verbose) {
5160 fprintf(of, "; info ==>");
5161 switch(((pCodeInfo *)pc)->type) {
5162 case INF_OPTIMIZATION:
5163 fprintf(of, " [optimization] %s\n", OPT_TYPE_STR[ PCOO(PCINF(pc)->oper1)->type ]);
5166 fprintf(of, " [localregs] %s\n", LR_TYPE_STR[ PCOLR(PCINF(pc)->oper1)->type ]);
5174 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
5178 // If the opcode has a label, print that first
5180 pBranch *pbl = PCI(pc)->label;
5181 while(pbl && pbl->pc) {
5182 if(pbl->pc->type == PC_LABEL)
5183 pCodePrintLabel(of, pbl->pc);
5189 genericPrint(of,PCODE(PCI(pc)->cline));
5194 pic16_pCode2str(str, 256, pc);
5196 fprintf(of,"%s",str);
5198 if(pic16_debug_verbose) {
5199 fprintf(of, "\t;key=%03x",pc->seq);
5201 fprintf(of,", flow seq=%03x",PCI(pc)->pcflow->pc.seq);
5208 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
5209 if(PCW(pc)->pci.label)
5210 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
5212 if(PCW(pc)->operand) {
5213 fprintf(of,";\toperand ");
5214 pCodeOpPrint(of,PCW(pc)->operand );
5219 if(pic16_debug_verbose) {
5220 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
5221 if(PCFL(pc)->ancestor)
5222 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
5229 // fprintf(of,";#CSRC\t%s %d\t\t%s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
5230 fprintf(of,"%s\t.line\t%d; %s\t%s\n", ((pic16_mplab_comp || !options.debug)?";":""),
5231 PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
5237 pBranch *pbl = PCAD(pc)->pci.label;
5238 while(pbl && pbl->pc) {
5239 if(pbl->pc->type == PC_LABEL)
5240 pCodePrintLabel(of, pbl->pc);
5244 if(PCAD(pc)->directive) {
5245 fprintf(of, "\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
5248 /* special case to handle inline labels without tab */
5249 fprintf(of, "%s\n", PCAD(pc)->arg);
5255 fprintf(of,"unknown pCode type %d\n",pc->type);
5260 /*-----------------------------------------------------------------*/
5261 /* pCodePrintFunction - prints function begin/end */
5262 /*-----------------------------------------------------------------*/
5264 static void pCodePrintFunction(FILE *of, pCode *pc)
5271 if( ((pCodeFunction *)pc)->modname)
5272 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
5275 if(!PCF(pc)->absblock) {
5276 if(PCF(pc)->fname) {
5277 pBranch *exits = PCF(pc)->to;
5280 fprintf(of,"%s:", PCF(pc)->fname);
5282 if(pic16_pcode_verbose)
5283 fprintf(of, "\t;Function start");
5289 exits = exits->next;
5293 if(pic16_pcode_verbose)
5294 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
5297 if((PCF(pc)->from &&
5298 PCF(pc)->from->pc->type == PC_FUNCTION &&
5299 PCF(PCF(pc)->from->pc)->fname) ) {
5301 if(pic16_pcode_verbose)
5302 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
5304 if(pic16_pcode_verbose)
5305 fprintf(of,"; exit point [can't find entry point]\n");
5311 /*-----------------------------------------------------------------*/
5312 /* pCodePrintLabel - prints label */
5313 /*-----------------------------------------------------------------*/
5315 static void pCodePrintLabel(FILE *of, pCode *pc)
5322 fprintf(of,"%s:\n",PCL(pc)->label);
5323 else if (PCL(pc)->key >=0)
5324 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
5326 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
5329 /*-----------------------------------------------------------------*/
5330 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
5331 /* remove it if it is found. */
5332 /*-----------------------------------------------------------------*/
5333 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
5340 if(pcl->type == PC_OPCODE || pcl->type == PC_INLINE || pcl->type == PC_ASMDIR)
5341 b = PCI(pcl)->label;
5343 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
5348 //fprintf (stderr, "%s \n",__FUNCTION__);
5349 //pcl->print(stderr,pcl);
5350 //pc->print(stderr,pc);
5353 //fprintf (stderr, "found label\n");
5354 //pc->print(stderr, pc);
5358 bprev->next = b->next; /* Not first pCode in chain */
5362 PCI(pcl)->label = b->next; /* First pCode in chain */
5365 return; /* A label can't occur more than once */
5373 /*-----------------------------------------------------------------*/
5374 /*-----------------------------------------------------------------*/
5375 pBranch * pic16_pBranchAppend(pBranch *h, pBranch *n)
5394 /*-----------------------------------------------------------------*/
5395 /* pBranchLink - given two pcodes, this function will link them */
5396 /* together through their pBranches */
5397 /*-----------------------------------------------------------------*/
5398 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
5402 // Declare a new branch object for the 'from' pCode.
5404 //_ALLOC(b,sizeof(pBranch));
5405 b = Safe_calloc(1,sizeof(pBranch));
5406 b->pc = PCODE(t); // The link to the 'to' pCode.
5409 f->to = pic16_pBranchAppend(f->to,b);
5411 // Now do the same for the 'to' pCode.
5413 //_ALLOC(b,sizeof(pBranch));
5414 b = Safe_calloc(1,sizeof(pBranch));
5418 t->from = pic16_pBranchAppend(t->from,b);
5423 /*-----------------------------------------------------------------*/
5424 /* pBranchFind - find the pBranch in a pBranch chain that contains */
5426 /*-----------------------------------------------------------------*/
5427 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
5440 /*-----------------------------------------------------------------*/
5441 /* pic16_pCodeUnlink - Unlink the given pCode from its pCode chain. */
5442 /*-----------------------------------------------------------------*/
5443 void pic16_pCodeUnlink(pCode *pc)
5448 if(!pc->prev || !pc->next) {
5449 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
5453 /* move C source line down (or up) */
5454 if (isPCI(pc) && PCI(pc)->cline) {
5455 pc1 = pic16_findNextInstruction (pc->next);
5456 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline) {
5457 PCI(pc1)->cline = PCI(pc)->cline;
5459 pc1 = pic16_findPrevInstruction (pc->prev);
5460 if (pc1 && isPCI(pc1) && !PCI(pc1)->cline)
5461 PCI(pc1)->cline = PCI(pc)->cline;
5465 /* first remove the pCode from the chain */
5466 pc->prev->next = pc->next;
5467 pc->next->prev = pc->prev;
5469 pc->prev = pc->next = NULL;
5471 /* Now for the hard part... */
5473 /* Remove the branches */
5475 pb1 = PCI(pc)->from;
5477 pc1 = pb1->pc; /* Get the pCode that branches to the
5478 * one we're unlinking */
5480 /* search for the link back to this pCode (the one we're
5482 if((pb2 = pBranchFind(PCI(pc1)->to,pc))) {
5483 pb2->pc = PCI(pc)->to->pc; // make the replacement
5485 /* if the pCode we're unlinking contains multiple 'to'
5486 * branches (e.g. this a skip instruction) then we need
5487 * to copy these extra branches to the chain. */
5488 if(PCI(pc)->to->next)
5489 pic16_pBranchAppend(pb2, PCI(pc)->to->next);
5498 /*-----------------------------------------------------------------*/
5499 /*-----------------------------------------------------------------*/
5501 static void genericAnalyze(pCode *pc)
5511 // Go through the pCodes that are in pCode chain and link
5512 // them together through the pBranches. Note, the pCodes
5513 // are linked together as a contiguous stream like the
5514 // assembly source code lines. The linking here mimics this
5515 // except that comments are not linked in.
5517 pCode *npc = pc->next;
5519 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
5520 pBranchLink(pc,npc);
5525 /* reached the end of the pcode chain without finding
5526 * an instruction we could link to. */
5530 fprintf(stderr,"analyze PC_FLOW\n");
5534 fprintf(stderr,,";A bad pCode is being used\n");
5540 /*-----------------------------------------------------------------*/
5541 /*-----------------------------------------------------------------*/
5542 static int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
5546 if(pc->type == PC_LABEL) {
5547 if( ((pCodeLabel *)pc)->key == pcop_label->key)
5550 if((pc->type == PC_OPCODE)
5551 || (pc->type == PC_ASMDIR)
5553 pbr = PCI(pc)->label;
5555 if(pbr->pc->type == PC_LABEL) {
5556 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
5566 /*-----------------------------------------------------------------*/
5567 /*-----------------------------------------------------------------*/
5568 static int checkLabel(pCode *pc)
5572 if(pc && isPCI(pc)) {
5573 pbr = PCI(pc)->label;
5575 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
5585 /*-----------------------------------------------------------------*/
5586 /* findLabelinpBlock - Search the pCode for a particular label */
5587 /*-----------------------------------------------------------------*/
5588 static pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
5595 for(pc = pb->pcHead; pc; pc = pc->next)
5596 if(compareLabel(pc,pcop_label))
5602 /*-----------------------------------------------------------------*/
5603 /* findLabel - Search the pCode for a particular label */
5604 /*-----------------------------------------------------------------*/
5605 static pCode * findLabel(pCodeOpLabel *pcop_label)
5613 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5614 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
5618 fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
5622 /*-----------------------------------------------------------------*/
5623 /* pic16_findNextpCode - given a pCode, find the next of type 'pct' */
5624 /* in the linked list */
5625 /*-----------------------------------------------------------------*/
5626 pCode * pic16_findNextpCode(pCode *pc, PC_TYPE pct)
5639 /*-----------------------------------------------------------------*/
5640 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
5641 /* in the linked list */
5642 /*-----------------------------------------------------------------*/
5643 static pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
5657 //#define PCODE_DEBUG
5658 /*-----------------------------------------------------------------*/
5659 /* pic16_findNextInstruction - given a pCode, find the next instruction */
5660 /* in the linked list */
5661 /*-----------------------------------------------------------------*/
5662 pCode * pic16_findNextInstruction(pCode *pci)
5667 if((pc->type == PC_OPCODE)
5668 || (pc->type == PC_WILD)
5669 || (pc->type == PC_ASMDIR)
5674 fprintf(stderr,"pic16_findNextInstruction: ");
5675 printpCode(stderr, pc);
5680 //fprintf(stderr,"Couldn't find instruction\n");
5684 /*-----------------------------------------------------------------*/
5685 /* pic16_findPrevInstruction - given a pCode, find the next instruction */
5686 /* in the linked list */
5687 /*-----------------------------------------------------------------*/
5688 pCode * pic16_findPrevInstruction(pCode *pci)
5694 if((pc->type == PC_OPCODE)
5695 || (pc->type == PC_WILD)
5696 || (pc->type == PC_ASMDIR)
5702 fprintf(stderr,"pic16_findPrevInstruction: ");
5703 printpCode(stderr, pc);
5708 //fprintf(stderr,"Couldn't find instruction\n");
5715 /*-----------------------------------------------------------------*/
5716 /* findFunctionEnd - given a pCode find the end of the function */
5717 /* that contains it */
5718 /*-----------------------------------------------------------------*/
5719 static pCode * findFunctionEnd(pCode *pc)
5723 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
5729 fprintf(stderr,"Couldn't find function end\n");
5734 /*-----------------------------------------------------------------*/
5735 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
5736 /* instruction with which it is associated. */
5737 /*-----------------------------------------------------------------*/
5738 static void AnalyzeLabel(pCode *pc)
5741 pic16_pCodeUnlink(pc);
5747 static void AnalyzeGOTO(pCode *pc)
5750 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
5754 static void AnalyzeSKIP(pCode *pc)
5757 pBranchLink(pc,pic16_findNextInstruction(pc->next));
5758 pBranchLink(pc,pic16_findNextInstruction(pc->next->next));
5762 static void AnalyzeRETURN(pCode *pc)
5765 // branch_link(pc,findFunctionEnd(pc->next));
5771 /*-------------------------------------------------------------------*/
5772 /* pic16_getRegFrompCodeOp - extract the register from a pCodeOp */
5773 /* if one is present. This is the common */
5774 /* part of pic16_getRegFromInstruction(2) */
5775 /*-------------------------------------------------------------------*/
5777 regs * pic16_getRegFrompCodeOp (pCodeOp *pcop) {
5778 if (!pcop) return NULL;
5780 switch(pcop->type) {
5793 return PCOR(pcop)->r;
5795 case PO_SFR_REGISTER:
5796 //fprintf (stderr, "%s - SFR\n", __FUNCTION__);
5797 return PCOR(pcop)->r;
5801 // fprintf(stderr, "pic16_getRegFromInstruction - bit or temp\n");
5802 return PCOR(pcop)->r;
5805 // return pic16_dirregWithName(PCOI(pcop)->r->name);
5808 return (PCOI(pcop)->r);
5813 return PCOR(pcop)->r;
5815 case PO_GPR_REGISTER:
5817 // fprintf(stderr, "pic16_getRegFromInstruction - dir\n");
5818 return PCOR(pcop)->r;
5821 //fprintf(stderr, "pic16_getRegFromInstruction - literal\n");
5826 //fprintf (stderr, "%s - label or address: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5831 /* this should never turn up */
5832 //fprintf (stderr, "%s - unused pCodeOp->type: %d (%s)\n", __FUNCTION__, pcop->type, dumpPicOptype(pcop->type));
5839 fprintf(stderr, "pic16_getRegFromInstruction - unknown reg type %d (%s)\n",pcop->type, dumpPicOptype (pcop->type));
5847 /*-----------------------------------------------------------------*/
5848 /*-----------------------------------------------------------------*/
5849 regs * pic16_getRegFromInstruction(pCode *pc)
5855 PCI(pc)->num_ops == 0 ||
5856 (PCI(pc)->num_ops == 1 && PCI(pc)->isFastCall))
5860 fprintf(stderr, "pic16_getRegFromInstruction - reg type %s (%d)\n",
5861 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5864 return pic16_getRegFrompCodeOp (PCI(pc)->pcop);
5867 /*-------------------------------------------------------------------------------*/
5868 /* pic16_getRegFromInstruction2 - variant to support two memory operand commands */
5869 /*-------------------------------------------------------------------------------*/
5870 regs * pic16_getRegFromInstruction2(pCode *pc)
5876 PCI(pc)->num_ops == 0 ||
5877 (PCI(pc)->num_ops == 1)) // accept only 2 operand commands
5882 fprintf(stderr, "pic16_getRegFromInstruction2 - reg type %s (%d)\n",
5883 dumpPicOptype( PCI(pc)->pcop->type), PCI(pc)->pcop->type);
5886 return pic16_getRegFrompCodeOp (PCOR2(PCI(pc)->pcop)->pcop2);
5889 /*-----------------------------------------------------------------*/
5890 /*-----------------------------------------------------------------*/
5892 static void AnalyzepBlock(pBlock *pb)
5899 /* Find all of the registers used in this pBlock
5900 * by looking at each instruction and examining it's
5903 for(pc = pb->pcHead; pc; pc = pc->next) {
5905 /* Is this an instruction with operands? */
5906 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
5908 if(PCI(pc)->pcop->type == PO_GPR_TEMP) {
5910 /* Loop through all of the registers declared so far in
5911 this block and see if we find this one there */
5913 regs *r = setFirstItem(pb->tregisters);
5916 if(r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) {
5917 PCOR(PCI(pc)->pcop)->r = r;
5920 r = setNextItem(pb->tregisters);
5924 /* register wasn't found */
5925 //r = Safe_calloc(1, sizeof(regs));
5926 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
5927 //addSet(&pb->tregisters, r);
5928 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
5929 //PCOR(PCI(pc)->pcop)->r = r;
5930 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
5932 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
5935 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
5936 if(PCOR(PCI(pc)->pcop)->r) {
5937 pic16_allocWithIdx(PCOR(PCI(pc)->pcop)->r->rIdx); /* FIXME! - VR */
5938 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
5940 if(PCI(pc)->pcop->name)
5941 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
5943 fprintf(stderr,"ERROR: NULL register\n");
5952 /*-----------------------------------------------------------------*/
5954 /*-----------------------------------------------------------------*/
5955 #define PCI_HAS_LABEL(x) ((x) && (PCI(x)->label != NULL))
5957 static void InsertpFlow(pCode *pc, pCode **pflow)
5960 PCFL(*pflow)->end = pc;
5962 if(!pc || !pc->next)
5965 *pflow = pic16_newpCodeFlow();
5966 pic16_pCodeInsertAfter(pc, *pflow);
5969 /*-----------------------------------------------------------------*/
5970 /* pic16_BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
5971 /* the flow blocks. */
5973 * pic16_BuildFlow inserts pCodeFlow objects into the pCode chain at each
5974 * point the instruction flow changes.
5976 /*-----------------------------------------------------------------*/
5977 void pic16_BuildFlow(pBlock *pb)
5980 pCode *last_pci=NULL;
5987 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
5988 /* Insert a pCodeFlow object at the beginning of a pBlock */
5990 InsertpFlow(pb->pcHead, &pflow);
5992 //pflow = pic16_newpCodeFlow(); /* Create a new Flow object */
5993 //pflow->next = pb->pcHead; /* Make the current head the next object */
5994 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
5995 //pb->pcHead = pflow; /* Make the Flow object the head */
5998 for( pc = pic16_findNextInstruction(pb->pcHead);
6000 pc=pic16_findNextInstruction(pc)) {
6003 PCI(pc)->pcflow = PCFL(pflow);
6005 //fprintf(stderr," build: ");
6006 //pflow->print(stderr,pflow);
6008 if (checkLabel(pc)) {
6010 /* This instruction marks the beginning of a
6011 * new flow segment */
6016 /* If the previous pCode is not a flow object, then
6017 * insert a new flow object. (This check prevents
6018 * two consecutive flow objects from being insert in
6019 * the case where a skip instruction preceeds an
6020 * instruction containing a label.) */
6022 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
6023 InsertpFlow(pic16_findPrevInstruction(pc->prev), &pflow);
6025 PCI(pc)->pcflow = PCFL(pflow);
6029 if( PCI(pc)->isSkip) {
6031 /* The two instructions immediately following this one
6032 * mark the beginning of a new flow segment */
6034 while(pc && PCI(pc)->isSkip) {
6036 PCI(pc)->pcflow = PCFL(pflow);
6040 InsertpFlow(pc, &pflow);
6041 pc=pic16_findNextInstruction(pc->next);
6049 PCI(pc)->pcflow = PCFL(pflow);
6051 InsertpFlow(pc, &pflow);
6053 } else if ( PCI(pc)->isBranch && !checkLabel(pic16_findNextInstruction(pc->next))) {
6055 InsertpFlow(pc, &pflow);
6063 //fprintf (stderr,",end seq %d",GpcFlowSeq);
6065 PCFL(pflow)->end = pb->pcTail;
6068 /*-------------------------------------------------------------------*/
6069 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
6070 /* the flow blocks. */
6072 * unBuildFlow removes pCodeFlow objects from a pCode chain
6074 /*-----------------------------------------------------------------*/
6075 static void unBuildFlow(pBlock *pb)
6090 if(PCI(pc)->pcflow) {
6091 //Safe_free(PCI(pc)->pcflow);
6092 PCI(pc)->pcflow = NULL;
6095 } else if(isPCFL(pc) )
6104 /*-----------------------------------------------------------------*/
6105 /*-----------------------------------------------------------------*/
6106 static void dumpCond(int cond)
6109 static char *pcc_str[] = {
6123 int ncond = sizeof(pcc_str) / sizeof(char *);
6126 fprintf(stderr, "0x%04X\n",cond);
6128 for(i=0,j=1; i<ncond; i++, j<<=1)
6130 fprintf(stderr, " %s\n",pcc_str[i]);
6136 /*-----------------------------------------------------------------*/
6137 /*-----------------------------------------------------------------*/
6138 static void FlowStats(pCodeFlow *pcflow)
6146 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
6148 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6151 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
6156 fprintf(stderr, " FlowStats inCond: ");
6157 dumpCond(pcflow->inCond);
6158 fprintf(stderr, " FlowStats outCond: ");
6159 dumpCond(pcflow->outCond);
6163 /*-----------------------------------------------------------------*
6164 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
6165 * if it affects the banking bits.
6167 * return: -1 == Banking bits are unaffected by this pCode.
6169 * return: > 0 == Banking bits are affected.
6171 * If the banking bits are affected, then the returned value describes
6172 * which bits are affected and how they're affected. The lower half
6173 * of the integer maps to the bits that are affected, the upper half
6174 * to whether they're set or cleared.
6176 *-----------------------------------------------------------------*/
6178 static int isBankInstruction(pCode *pc)
6186 if( PCI(pc)->op == POC_MOVLB ||
6187 (( (reg = pic16_getRegFromInstruction(pc)) != NULL) && isBSR_REG(reg))) {
6188 bank = PCOL(pc)->lit;
6195 /*-----------------------------------------------------------------*/
6196 /*-----------------------------------------------------------------*/
6197 static void FillFlow(pCodeFlow *pcflow)
6206 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
6208 pc = pic16_findNextpCode(PCODE(pcflow), PC_OPCODE);
6211 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
6218 isBankInstruction(pc);
6220 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
6224 fprintf(stderr, " FillFlow - Bad end of flow\n");
6226 fprintf(stderr, " FillFlow - Ending flow with\n ");
6227 pc->print(stderr,pc);
6230 fprintf(stderr, " FillFlow inCond: ");
6231 dumpCond(pcflow->inCond);
6232 fprintf(stderr, " FillFlow outCond: ");
6233 dumpCond(pcflow->outCond);
6237 /*-----------------------------------------------------------------*/
6238 /*-----------------------------------------------------------------*/
6239 static void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
6241 pCodeFlowLink *fromLink, *toLink;
6243 if(!from || !to || !to->pcflow || !from->pcflow)
6246 fromLink = pic16_newpCodeFlowLink(from->pcflow);
6247 toLink = pic16_newpCodeFlowLink(to->pcflow);
6249 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
6250 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
6254 pCode *pic16_getJumptabpCode (pCode *pc) {
6257 //fprintf (stderr, "%s - start for %p in %p", __FUNCTION__, pc, isPCI(pc) ? PCI(pc)->pcflow : NULL);
6258 //pc->print (stderr, pc);
6261 if (isPCI(pcinf) && PCI(pcinf)->op != POC_GOTO) return NULL;
6262 if (pcinf->type == PC_INFO && PCINF(pcinf)->type == INF_OPTIMIZATION) {
6263 switch (PCOO(PCINF(pcinf)->oper1)->type) {
6264 case OPT_JUMPTABLE_BEGIN:
6265 /* leading begin of jump table -- in one */
6266 pcinf = pic16_findPrevInstruction (pcinf);
6270 case OPT_JUMPTABLE_END:
6271 /* leading end of jumptable -- not in one */
6276 /* ignore all other PCInfos */
6280 pcinf = pcinf->prev;
6283 /* no PCInfo found -- not in a jumptable */
6287 /*-----------------------------------------------------------------*
6288 * void LinkFlow(pBlock *pb)
6290 * In pic16_BuildFlow, the PIC code has been partitioned into contiguous
6291 * non-branching segments. In LinkFlow, we determine the execution
6292 * order of these segments. For example, if one of the segments ends
6293 * with a skip, then we know that there are two possible flow segments
6294 * to which control may be passed.
6295 *-----------------------------------------------------------------*/
6296 static void LinkFlow(pBlock *pb)
6301 pCode *jumptab_pre = NULL;
6303 //fprintf(stderr,"linkflow \n");
6305 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6307 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6310 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
6312 //fprintf(stderr," link: ");
6313 //pcflow->print(stderr,pcflow);
6315 //FillFlow(PCFL(pcflow));
6317 pc = PCFL(pcflow)->end;
6319 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
6320 if(isPCI_SKIP(pc)) {
6321 // fprintf(stderr, "ends with skip\n");
6322 // pc->print(stderr,pc);
6324 pct=pic16_findNextInstruction(pc->next);
6325 LinkFlow_pCode(PCI(pc),PCI(pct));
6326 pct=pic16_findNextInstruction(pct->next);
6327 LinkFlow_pCode(PCI(pc),PCI(pct));
6331 if(isPCI_BRANCH(pc)) {
6332 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6334 /* handle GOTOs in jumptables */
6335 if ((jumptab_pre = pic16_getJumptabpCode (pc)) != NULL) {
6336 /* link to previous flow */
6337 //fprintf (stderr, "linked jumptable GOTO to predecessor %p\n", PCI(jumptab_pre)->pcflow);
6338 LinkFlow_pCode (PCI(jumptab_pre), PCI(pc));
6341 switch (PCI(pc)->op) {
6347 /* unconditional branches -- do not link to next instruction */
6348 //fprintf (stderr, "%s: flow ended by unconditional branch\n", __FUNCTION__);
6353 /* unconditional calls -- link to next instruction */
6354 //fprintf (stderr, "%s: flow ended by CALL\n", __FUNCTION__);
6355 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6366 /* conditional branches -- also link to next instruction */
6367 //fprintf (stderr, "%s: flow ended by conditional branch\n", __FUNCTION__);
6368 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6372 fprintf (stderr, "%s: unhandled op %u (%s)\n", __FUNCTION__, PCI(pc)->op , PCI(pc)->mnemonic);
6373 assert (0 && "unhandled branching instruction");
6377 //fprintf(stderr, "ends with branch\n ");
6378 //pc->print(stderr,pc);
6380 if(!(pcol && isPCOLAB(pcol))) {
6381 if((PCI(pc)->op != POC_RETLW)
6382 && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RCALL) && (PCI(pc)->op != POC_RETFIE) ) {
6384 /* continue if label is '$' which assembler knows how to parse */
6385 if(((PCI(pc)->pcop->type == PO_STR) && !strcmp(PCI(pc)->pcop->name, "$")))continue;
6387 if(pic16_pcode_verbose) {
6388 pc->print(stderr,pc);
6389 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
6395 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
6396 LinkFlow_pCode(PCI(pc),PCI(pct));
6398 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
6399 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
6401 // fprintf(stderr,"pic16_newpCodeOpLabel: key=%d, name=%s\n",pcol->key,(PCOP(pcol)->name)?(PCOP(pcol)->name):"<unknown>");
6407 //fprintf(stderr, "ends with non-branching instruction:\n");
6408 //pc->print(stderr,pc);
6410 LinkFlow_pCode(PCI(pc),PCI(pic16_findNextInstruction(pc->next)));
6416 //fprintf(stderr, "ends with unknown\n");
6417 //pc->print(stderr,pc);
6421 //fprintf(stderr, "ends with nothing: ERROR\n");
6425 /*-----------------------------------------------------------------*/
6426 /*-----------------------------------------------------------------*/
6428 /*-----------------------------------------------------------------*/
6429 /*-----------------------------------------------------------------*/
6430 int pic16_isPCinFlow(pCode *pc, pCode *pcflow)
6436 if((!isPCI(pc) && !isPCAD(pc)) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
6439 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
6449 /*-----------------------------------------------------------------*/
6450 /* insertBankSwitch - inserts a bank switch statement in the */
6451 /* assembly listing */
6453 /* position == 0: insert before */
6454 /* position == 1: insert after pc */
6455 /* position == 2: like 0 but previous was a skip instruction */
6456 /*-----------------------------------------------------------------*/
6457 pCodeOp *pic16_popGetLabel(unsigned int key);
6458 extern int pic16_labelOffset;
6460 static void insertBankSwitch(unsigned char position, pCode *pc)
6467 /* emit BANKSEL [symbol] */
6470 new_pc = pic16_newpCodeAsmDir("BANKSEL", "%s", pic16_get_op_from_instruction(PCI(pc)));
6472 // position = 0; // position is always before (sanity check!)
6475 fprintf(stderr, "%s:%d: inserting bank switch (pos: %d)\n", __FUNCTION__, __LINE__, position);
6476 pc->print(stderr, pc);
6481 /* insert the bank switch after this pc instruction */
6482 pCode *pcnext = pic16_findNextInstruction(pc);
6484 pic16_pCodeInsertAfter(pc, new_pc);
6485 if(pcnext)pc = pcnext;
6489 /* insert the bank switch BEFORE this pc instruction */
6490 pic16_pCodeInsertAfter(pc->prev, new_pc);
6495 pCode *pcnext, *pcprev, *npci, *ppc;
6497 int ofs1=0, ofs2=0, len=0;
6499 /* just like 0, but previous was a skip instruction,
6500 * so some care should be taken */
6502 pic16_labelOffset += 10000;
6503 tlbl = newiTempLabel(NULL);
6505 /* invert skip instruction */
6506 pcprev = pic16_findPrevInstruction(pc->prev);
6507 ipci = PCI(pcprev)->inverted_op;
6508 npci = pic16_newpCode(ipci, PCI(pcprev)->pcop);
6510 // fprintf(stderr, "%s:%d old OP: %d\tnew OP: %d\n", __FILE__, __LINE__, PCI(pcprev)->op, ipci);
6512 /* copy info from old pCode */
6513 ofs1 = ofs2 = sizeof( pCode ) + sizeof(PIC_OPCODE);
6514 len = sizeof(pCodeInstruction) - ofs1 - sizeof( char const * const *);
6515 ofs1 += strlen( PCI(pcprev)->mnemonic) + 1;
6516 ofs2 += strlen( PCI(npci)->mnemonic) + 1;
6517 memcpy(&PCI(npci)->from, &PCI(pcprev)->from, (char *)(&(PCI(npci)->pci_magic)) - (char *)(&(PCI(npci)->from)));
6518 PCI(npci)->op = PCI(pcprev)->inverted_op;
6520 /* unlink old pCode */
6522 ppc->next = pcprev->next;
6523 pcprev->next->prev = ppc;
6524 pic16_pCodeInsertAfter(ppc, npci);
6526 /* extra instructions to handle invertion */
6527 pcnext = pic16_newpCode(POC_BRA, pic16_popGetLabel(tlbl->key));
6528 pic16_pCodeInsertAfter(npci, pcnext);
6529 pic16_pCodeInsertAfter(pc->prev, new_pc);
6531 pcnext = pic16_newpCodeLabel(NULL,tlbl->key+100+pic16_labelOffset);
6532 pic16_pCodeInsertAfter(pc, pcnext);
6537 /* Move the label, if there is one */
6538 if(PCI(pc)->label) {
6539 // fprintf(stderr, "%s:%d: moving label due to bank switch directive src= 0x%p dst= 0x%p\n",
6540 // __FILE__, __LINE__, pc, new_pc);
6541 PCAD(new_pc)->pci.label = PCI(pc)->label;
6542 PCI(pc)->label = NULL;
6547 /*-----------------------------------------------------------------*/
6548 /*int compareBankFlow - compare the banking requirements between */
6550 /*-----------------------------------------------------------------*/
6551 static int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
6554 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
6557 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
6560 if(pcflow->firstBank == -1)
6564 if(pcflowLink->pcflow->firstBank == -1) {
6565 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
6566 pcflowLink->pcflow->to :
6567 pcflowLink->pcflow->from);
6568 return compareBankFlow(pcflow, pctl, toORfrom);
6572 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
6575 pcflowLink->bank_conflict++;
6576 pcflowLink->pcflow->FromConflicts++;
6577 pcflow->ToConflicts++;
6580 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
6583 pcflowLink->bank_conflict++;
6584 pcflowLink->pcflow->ToConflicts++;
6585 pcflow->FromConflicts++;
6589 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
6590 pcflowLink->pcflow->pc.seq,
6591 pcflowLink->pcflow->FromConflicts,
6592 pcflowLink->pcflow->ToConflicts);
6599 /*-----------------------------------------------------------------*/
6600 /*-----------------------------------------------------------------*/
6601 static void DumpFlow(pBlock *pb)
6605 pCodeFlowLink *pcfl;
6608 fprintf(stderr,"Dump flow \n");
6609 pb->pcHead->print(stderr, pb->pcHead);
6611 pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6612 pcflow->print(stderr,pcflow);
6614 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
6616 pcflow = pic16_findNextpCode(pcflow->next, PC_FLOW) ) {
6618 if(!isPCFL(pcflow)) {
6619 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
6622 fprintf(stderr,"dumping: ");
6623 pcflow->print(stderr,pcflow);
6624 FlowStats(PCFL(pcflow));
6626 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6628 pc = PCODE(pcfl->pcflow);
6630 fprintf(stderr, " from seq %d:\n",pc->seq);
6632 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
6633 pc->print(stderr,pc);
6638 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
6640 pc = PCODE(pcfl->pcflow);
6642 fprintf(stderr, " to seq %d:\n",pc->seq);
6644 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
6645 pc->print(stderr,pc);
6654 /*-----------------------------------------------------------------*/
6655 /*-----------------------------------------------------------------*/
6656 static int OptimizepBlock(pBlock *pb)
6661 if(!pb || !peepOptimizing)
6664 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
6666 for(pc = pb->pcHead; pc; pc = pc->next)
6667 matches += pic16_pCodePeepMatchRule(pc);
6670 pc = pic16_findNextInstruction(pb->pcHead);
6678 if(pic16_pCodePeepMatchRule(pc)) {
6683 pc = pic16_findNextInstruction(pcprev->next);
6685 pc = pic16_findNextInstruction(pb->pcHead);
6687 pc = pic16_findNextInstruction(pc->next);
6691 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
6696 /*-----------------------------------------------------------------*/
6697 /*-----------------------------------------------------------------*/
6698 static pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
6702 for(pc = pcs; pc; pc = pc->next) {
6704 if(((pc->type == PC_OPCODE) || (pc->type == PC_INLINE) || (pc->type == PC_ASMDIR)) &&
6706 (PCI(pc)->pcop->type == PO_LABEL) &&
6707 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
6715 /*-----------------------------------------------------------------*/
6716 /*-----------------------------------------------------------------*/
6717 static void exchangeLabels(pCodeLabel *pcl, pCode *pc)
6724 (PCI(pc)->pcop->type == PO_LABEL)) {
6726 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
6728 // fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
6729 // if(pcol->pcop.name)
6730 // Safe_free(pcol->pcop.name);
6732 /* If the key is negative, then we (probably) have a label to
6733 * a function and the name is already defined */
6736 sprintf(s=buffer,"_%05d_DS_",pcl->key);
6740 //sprintf(buffer,"_%05d_DS_",pcl->key);
6742 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
6744 pcol->pcop.name = Safe_strdup(s);
6745 pcol->key = pcl->key;
6746 //pc->print(stderr,pc);
6753 /*-----------------------------------------------------------------*/
6754 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
6755 /* pCode chain if they're not used. */
6756 /*-----------------------------------------------------------------*/
6757 static void pBlockRemoveUnusedLabels(pBlock *pb)
6759 pCode *pc; pCodeLabel *pcl;
6764 for(pc = pb->pcHead; (pc=pic16_findNextInstruction(pc->next)) != NULL; ) {
6766 pBranch *pbr = PCI(pc)->label;
6767 if(pbr && pbr->next) {
6768 pCode *pcd = pb->pcHead;
6770 // fprintf(stderr, "multiple labels\n");
6771 // pc->print(stderr,pc);
6776 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
6777 //fprintf(stderr,"Used by:\n");
6778 //pcd->print(stderr,pcd);
6780 exchangeLabels(PCL(pbr->pc),pcd);
6789 for(pc = pb->pcHead; pc; pc = pc->next) {
6791 if(isPCL(pc)) // pc->type == PC_LABEL)
6793 else if (isPCI(pc) && PCI(pc)->label) //((pc->type == PC_OPCODE) && PCI(pc)->label)
6794 pcl = PCL(PCI(pc)->label->pc);
6797 // fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6799 /* This pCode is a label, so search the pBlock to see if anyone
6802 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))
6804 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
6805 /* Couldn't find an instruction that refers to this label
6806 * So, unlink the pCode label from it's pCode chain
6807 * and destroy the label */
6808 // fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
6810 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
6811 if(pc->type == PC_LABEL) {
6812 pic16_unlinkpCode(pc);
6813 pCodeLabelDestruct(pc);
6815 unlinkpCodeFromBranch(pc, PCODE(pcl));
6816 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
6817 Safe_free(pc->label);
6827 /*-----------------------------------------------------------------*/
6828 /* pic16_pBlockMergeLabels - remove the pCode labels from the pCode */
6829 /* chain and put them into pBranches that are */
6830 /* associated with the appropriate pCode */
6832 /*-----------------------------------------------------------------*/
6833 void pic16_pBlockMergeLabels(pBlock *pb)
6836 pCode *pc, *pcnext=NULL;
6841 /* First, Try to remove any unused labels */
6842 //pBlockRemoveUnusedLabels(pb);
6844 /* Now loop through the pBlock and merge the labels with the opcodes */
6847 // for(pc = pb->pcHead; pc; pc = pc->next) {
6850 pCode *pcn = pc->next;
6852 if(pc->type == PC_LABEL) {
6854 // fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
6855 // fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
6857 if((pcnext = pic16_findNextInstruction(pc) )) {
6859 // pcnext->print(stderr, pcnext);
6861 // Unlink the pCode label from it's pCode chain
6862 pic16_unlinkpCode(pc);
6864 // fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
6865 // And link it into the instruction's pBranch labels. (Note, since
6866 // it's possible to have multiple labels associated with one instruction
6867 // we must provide a means to accomodate the additional labels. Thus
6868 // the labels are placed into the singly-linked list "label" as
6869 // opposed to being a single member of the pCodeInstruction.)
6871 //_ALLOC(pbr,sizeof(pBranch));
6873 pbr = Safe_calloc(1,sizeof(pBranch));
6877 PCI(pcnext)->label = pic16_pBranchAppend(PCI(pcnext)->label,pbr);
6880 if(pic16_pcode_verbose)
6881 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
6883 } else if(pc->type == PC_CSOURCE) {
6885 /* merge the source line symbolic info into the next instruction */
6886 if((pcnext = pic16_findNextInstruction(pc) )) {
6888 // Unlink the pCode label from it's pCode chain
6889 pic16_unlinkpCode(pc);
6890 PCI(pcnext)->cline = PCCS(pc);
6891 //fprintf(stderr, "merging CSRC\n");
6892 //genericPrint(stderr,pcnext);
6898 pBlockRemoveUnusedLabels(pb);
6902 /*-----------------------------------------------------------------*/
6903 /*-----------------------------------------------------------------*/
6904 static int OptimizepCode(char dbName)
6906 #define MAX_PASSES 4
6915 DFPRINTF((stderr," Optimizing pCode\n"));
6919 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6920 if('*' == dbName || getpBlock_dbName(pb) == dbName)
6921 matches += OptimizepBlock(pb);
6924 while(matches && ++passes < MAX_PASSES);
6931 const char *pic16_pCodeOpType(pCodeOp *pcop);
6932 const char *pic16_pCodeOpSubType(pCodeOp *pcop);
6935 /*-----------------------------------------------------------------*/
6936 /* pic16_popCopyGPR2Bit - copy a pcode operator */
6937 /*-----------------------------------------------------------------*/
6939 pCodeOp *pic16_popCopyGPR2Bit(pCodeOp *pc, int bitval)
6943 // fprintf(stderr, "%s:%d pc type: %s\tname: %s\n", __FILE__, __LINE__, pic16_pCodeOpType(pc), pc->name);
6946 pcop = pic16_newpCodeOpBit(pc->name, bitval, 0, pc->type);
6948 if(PCOR(pc)->r)pcop = pic16_newpCodeOpBit(PCOR(pc)->r->name, bitval, 0, pc->type);
6951 assert(pcop != NULL);
6953 if( !( (pcop->type == PO_LABEL) ||
6954 (pcop->type == PO_LITERAL) ||
6955 (pcop->type == PO_STR) ))
6956 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
6957 PCOR(pcop)->r->wasUsed = 1;
6958 PCOR(pcop)->instance = PCOR(pc)->instance;
6964 /*----------------------------------------------------------------------*
6965 * pic16_areRegsSame - check to see if the names of two registers match *
6966 *----------------------------------------------------------------------*/
6967 int pic16_areRegsSame(regs *r1, regs *r2)
6969 if(!strcmp(r1->name, r2->name))return 1;
6975 /*-----------------------------------------------------------------*/
6976 /*-----------------------------------------------------------------*/
6977 static void pic16_FixRegisterBanking(pBlock *pb)
6981 regs *reg, *prevreg;
6982 unsigned char flag=0;
6987 pc = pic16_findNextpCode(pb->pcHead, PC_OPCODE);
6990 /* loop through all of the flow blocks with in one pblock */
6992 // fprintf(stderr,"%s:%d: Register banking\n", __FUNCTION__, __LINE__);
6996 /* at this point, pc should point to a PC_FLOW object */
6997 /* for each flow block, determine the register banking
7001 /* if label, then might come from other point, force banksel */
7002 if(isPCL(pc))prevreg = NULL;
7004 if(!isPCI(pc))goto loop;
7006 if(PCI(pc)->label)prevreg = NULL;
7008 if(PCI(pc)->is2MemOp)goto loop;
7010 /* if goto, then force banksel */
7011 // if(PCI(pc)->op == POC_GOTO)prevreg = NULL;
7013 reg = pic16_getRegFromInstruction(pc);
7016 pc->print(stderr, pc);
7017 fprintf(stderr, "reg = %p\n", reg);
7020 fprintf(stderr, "%s:%d: %s %d\n",__FUNCTION__, __LINE__, reg->name, reg->rIdx);
7021 fprintf(stderr, "addr = 0x%03x, bit=%d\tfix=%d\n",
7022 reg->address,reg->isBitField, reg->isFixed);
7026 /* now make some tests to make sure that instruction needs bank switch */
7028 /* if no register exists, and if not a bit opcode goto loop */
7030 if(!(PCI(pc)->pcop && PCI(pc)->pcop->type == PO_GPR_BIT))goto loop;
7033 if(isPCI_SKIP(pc)) {
7034 // fprintf(stderr, "instruction is SKIP instruction\n");
7037 if(reg && isACCESS_BANK(reg))goto loop;
7039 if(!isBankInstruction(pc))goto loop;
7041 if(isPCI_LIT(pc))goto loop;
7043 if(PCI(pc)->op == POC_CALL)goto loop;
7045 /* Examine the instruction before this one to make sure it is
7046 * not a skip type instruction */
7047 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
7049 flag = 0; /* add before this instruction */
7051 /* if previous instruction is a skip one, then set flag
7052 * to 2 and call insertBankSwitch */
7053 if(pcprev && isPCI_SKIP(pcprev)) {
7058 if(pic16_options.opt_banksel>0) {
7059 char op1[128], op2[128];
7062 strcpy(op1, pic16_get_op_from_instruction(PCI(pc)));
7063 strcpy(op2, pic16_get_op_from_instruction(PCI(pcprev)));
7064 if(!strcmp(op1, op2))goto loop;
7068 insertBankSwitch(flag, pc);
7070 // fprintf(stderr, "BANK SWITCH inserted\n");
7078 /** ADDITIONS BY RAPHAEL NEIDER, 2004-11-16: GOTO OPTIMIZATIONS **/
7080 /* Returns the (maximum of the) number of bytes used by the specified pCode. */
7081 int instrSize (pCode *pc)
7086 if (!PCAD(pc)->directive || strlen (PCAD(pc)->directive) < 3) return 0;
7087 return 4; // assumes only regular instructions using <= 4 bytes
7090 if (isPCI(pc)) return PCI(pc)->isize;
7095 /* Returns 1 if pc is referenced by the given label (either
7096 * pc is the label itself or is an instruction with an attached
7098 * Returns 0 if pc is not preceeded by the specified label.
7100 int isLabel (pCode *pc, char *label)
7104 // label attached to the pCode?
7105 if (isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO) {
7106 pBranch *lab = NULL;
7107 lab = PCI(pc)->label;
7110 if (isPCL(lab->pc) && strcmp(PCL(lab->pc)->label, label) == 0) {
7117 // is inline assembly label?
7118 if (isPCAD(pc) && PCAD(pc)->directive == NULL && PCAD(pc)->arg) {
7119 // do not compare trailing ':'
7120 if (strncmp (PCAD(pc)->arg, label, strlen (label)) == 0) {
7127 if (strcmp(PCL(pc)->label,label) == 0) {
7132 // no label/no label attached/wrong label(s)
7136 /* Returns the distance to the given label in terms of words.
7137 * Labels are searched only within -max .. max words from pc.
7138 * Returns max if the label could not be found or
7139 * its distance from pc in (-max..+max).
7141 int findpCodeLabel (pCode *pc, char *label, int max, pCode **target) {
7142 int dist = instrSize(pc);
7146 while (dist < max && curr && !isLabel (curr, label)) {
7148 dist += instrSize(curr); // sizeof (instruction)
7150 if (curr && dist < max) {
7151 if (target != NULL) *target = curr;
7156 curr = pic16_findNextInstruction (pc->next);
7158 while (dist < max && curr && !isLabel (curr, label)) {
7159 dist += instrSize(curr); // sizeof (instruction)
7162 if (curr && dist < max) {
7163 if (target != NULL) *target = curr;
7167 if (target != NULL) *target = NULL;
7171 /* Returns -1 if pc does NOT denote an instruction like
7173 * Otherwise we return
7174 * (a) 0x10 + i for BTFSS
7175 * (b) 0x00 + i for BTFSC
7177 int isSkipOnStatus (pCode *pc)
7181 if (!pc || !isPCI(pc)) return -1;
7182 if (PCI(pc)->op == POC_BTFSS) res = 0x10;
7183 else if (PCI(pc)->op == POC_BTFSC) res = 0x00;
7186 pcop = PCI(pc)->pcop;
7188 if (pcop->type == PO_STATUS || (pcop->type == PO_GPR_BIT && strcmp(pcop->name, "STATUS") == 0)) {
7189 return res + ((pCodeOpRegBit *)pcop)->bit;
7195 /* Returns 1 if pc is one of BC, BZ, BOV, BN, BNC, BNZ, BNOV or BNN,
7196 * returns 0 otherwise. */
7197 int isConditionalBranch (pCode *pc)
7199 if (!pc || !isPCI_BRANCH(pc)) return 0;
7201 switch (PCI(pc)->op) {
7219 /* Returns 1 if pc has a label attached to it.
7220 * This can be either a label stored in the pCode itself (.label)
7221 * or a label making up its own pCode preceding this pc.
7222 * Returns 0 if pc cannot be reached directly via a label.
7224 int hasNoLabel (pCode *pc)
7229 // are there any label pCodes between pc and the previous instruction?
7230 prev = pic16_findPrevInstruction (pc->prev);
7231 while (pc && pc != prev) {
7232 // pCode with attached label?
7233 if ((isPCI(pc) || isPCAD(pc) || isPCW(pc) || pc->type == PC_INFO)
7234 && PCI(pc)->label) {
7237 // is inline assembly label?
7238 if (isPCAD(pc) && PCAD(pc)->directive == NULL) return 0;
7239 if (isPCW(pc) && PCW(pc)->label) return 0;
7242 if (isPCL(pc)) return 0;
7251 static void pic16_InsertCommentAfter (pCode *pc, const char *fmt, ...) {
7256 vsprintf (buf, fmt, va);
7259 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(buf));
7262 /* Replaces the old pCode with the new one, moving the labels,
7263 * C source line and probably flow information to the new pCode.
7265 void pic16_pCodeReplace (pCode *oldPC, pCode *newPC) {
7266 if (!oldPC || !newPC || !isPCI(oldPC) || !isPCI(newPC))
7269 /* first move all labels from old to new */
7270 PCI(newPC)->label = pic16_pBranchAppend (PCI(oldPC)->label, PCI(newPC)->label);
7271 PCI(oldPC)->label = NULL;
7274 /* move C source line (if possible) */
7275 if (PCI(oldPC)->cline && !PCI(newPC)->cline)
7276 PCI(newPC)->cline = PCI(oldPC)->cline;
7279 /* keep flow information intact */
7280 newPC->seq = oldPC->seq;
7281 PCI(newPC)->pcflow = PCI(oldPC)->pcflow;
7282 if (PCI(newPC)->pcflow && PCI(newPC)->pcflow->end == oldPC) {
7283 PCI(newPC)->pcflow->end = newPC;
7286 /* insert a comment stating which pCode has been replaced */
7288 if (pic16_pcode_verbose || pic16_debug_verbose) {
7290 pic16_pCode2str (pc_str, 256, oldPC);
7291 pic16_InsertCommentAfter (oldPC->prev, "%s: replaced %s", __FUNCTION__, pc_str);
7295 /* insert new pCode into pBlock */
7296 pic16_pCodeInsertAfter (oldPC, newPC);
7297 pic16_unlinkpCode (oldPC);
7299 /* destruct replaced pCode */
7300 oldPC->destruct (oldPC);
7303 /* Returns the inverted conditional branch (if any) or NULL.
7304 * pcop must be set to the new jump target.
7306 pCode *getNegatedBcc (pCode *bcc, pCodeOp *pcop)
7310 if (!bcc || !isPCI(bcc)) return NULL;
7312 switch (PCI(bcc)->op) {
7313 case POC_BC: newBcc = pic16_newpCode (POC_BNC , pcop); break;
7314 case POC_BZ: newBcc = pic16_newpCode (POC_BNZ , pcop); break;
7315 case POC_BOV: newBcc = pic16_newpCode (POC_BNOV, pcop); break;
7316 case POC_BN: newBcc = pic16_newpCode (POC_BNN , pcop); break;
7317 case POC_BNC: newBcc = pic16_newpCode (POC_BC , pcop); break;
7318 case POC_BNZ: newBcc = pic16_newpCode (POC_BZ , pcop); break;
7319 case POC_BNOV: newBcc = pic16_newpCode (POC_BOV , pcop); break;
7320 case POC_BNN: newBcc = pic16_newpCode (POC_BN , pcop); break;
7327 #define MAX_DIST_GOTO 0x7FFFFFFF
7328 #define MAX_DIST_BRA 1020 // maximum offset (in bytes) possible with BRA
7329 #define MAX_DIST_BCC 120 // maximum offset (in bytes) possible with Bcc
7330 #define MAX_JUMPCHAIN_DEPTH 16 // number of GOTOs to follow in resolveJumpChain() (to prevent endless loops)
7331 #define IS_GOTO(arg) ((arg) && isPCI(arg) && (PCI(arg)->op == POC_GOTO || PCI(arg)->op == POC_BRA))
7333 /* Follows GOTO/BRA instructions to their target instructions, stores the
7334 * final destination (not a GOTO or BRA instruction) in target and returns
7335 * the distance from the original pc to *target.
7337 int resolveJumpChain (pCode *pc, pCode **target, pCodeOp **pcop) {
7340 pCodeOp *lastPCOP = NULL;
7344 //fprintf (stderr, "%s:%d: -=-", __FUNCTION__, __LINE__);
7346 /* only follow unconditional branches, except for the initial pCode (which may be a conditional branch) */
7347 while (curr && (last != curr) && (depth++ < MAX_JUMPCHAIN_DEPTH) && isPCI(curr)
7348 && (PCI(curr)->op == POC_GOTO || PCI(curr)->op == POC_BRA || (curr == pc && isConditionalBranch(curr)))) {
7350 lastPCOP = PCI(curr)->pcop;
7351 dist = findpCodeLabel (pc, PCI(curr)->pcop->name, MAX_DIST_GOTO, &curr);
7352 //fprintf (stderr, "last:%p, curr:%p, label:%s\n", last, curr, PCI(last)->pcop->name);
7355 if (target) *target = last;
7356 if (pcop) *pcop = lastPCOP;
7360 /* Returns pc if it is not a OPT_JUMPTABLE_BEGIN INFO pCode.
7361 * Otherwise the first pCode after the jumptable (after
7362 * the OPT_JUMPTABLE_END tag) is returned.
7364 pCode *skipJumptables (pCode *pc, int *isJumptable)
7367 if (!pc) return NULL;
7369 while (pc->type == PC_INFO && PCINF(pc)->type == INF_OPTIMIZATION && PCOO(PCINF(pc)->oper1)->type == OPT_JUMPTABLE_BEGIN) {
7371 //fprintf (stderr, "SKIPPING jumptable\n");
7373 //pc->print(stderr, pc);
7375 } while (pc && (pc->type != PC_INFO || PCINF(pc)->type != INF_OPTIMIZATION
7376 || PCOO(PCINF(pc)->oper1)->type != OPT_JUMPTABLE_END));
7377 //fprintf (stderr, "<<JUMPTAB:\n");
7378 // skip OPT_END as well
7379 if (pc) pc = pc->next;
7385 pCode *pic16_findNextInstructionSkipJumptables (pCode *pc, int *isJumptable)
7389 while (pc && !isPCI(pc) && !isPCAD(pc) && !isPCW(pc)) {
7390 // set pc to the first pCode after a jumptable, leave pc untouched otherwise
7391 pc = skipJumptables (pc, &isJumptab);
7393 // pc is the first pCode after the jumptable
7396 // pc has not been changed by skipJumptables()
7404 /* Turn GOTOs into BRAs if distance between GOTO and label
7405 * is less than 1024 bytes.
7407 * This method is especially useful if GOTOs after BTFS[SC]
7408 * can be turned into BRAs as GOTO would cost another NOP
7411 void pic16_OptimizeJumps ()
7414 pCode *pc_prev = NULL;
7415 pCode *pc_next = NULL;
7418 int change, iteration, isJumptab;
7421 int opt=0, toofar=0, opt_cond = 0, cond_toofar=0, opt_reorder = 0, opt_gotonext = 0, opt_gotochain = 0;
7423 if (!the_pFile) return;
7425 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7427 for (pb = the_pFile->pbHead; pb != NULL; pb = pb->next) {
7428 int matchedInvertRule = 1;
7431 //fprintf (stderr, "%s:%d: iterating over pBlock %p\n", __FUNCTION__, __LINE__, pb);
7433 pc = pic16_findNextInstruction (pb->pcHead);
7436 pc_next = pic16_findNextInstructionSkipJumptables (pc->next, &isJumptab);
7438 // skip jumptable, i.e. start over with no pc_prev!
7444 /* (1) resolve chained jumps
7445 * Do not perform this until pattern (4) is no longer present! Otherwise we will
7446 * (a) leave dead code in and
7447 * (b) skip over the dead code with an (unneccessary) jump.
7449 if (!matchedInvertRule && (IS_GOTO(pc) || isConditionalBranch(pc))) {
7450 pCodeOp *lastTargetOp = NULL;
7451 int newDist = resolveJumpChain (pc, &target, &lastTargetOp);
7452 int maxDist = MAX_DIST_BCC;
7453 if (PCI(pc)->op == POC_BRA) maxDist = MAX_DIST_BRA;
7454 if (PCI(pc)->op == POC_GOTO) maxDist = MAX_DIST_GOTO;
7456 /* be careful NOT to make the jump instruction longer (might break previously shortened jumps!) */
7457 if (lastTargetOp && newDist <= maxDist && lastTargetOp != PCI(pc)->pcop
7458 && strcmp (lastTargetOp->name, PCI(pc)->pcop->name) != 0) {
7459 //fprintf (stderr, "(1) ");pc->print(stderr, pc); fprintf (stderr, " --> %s\n", lastTargetOp->name);
7460 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(1) jump chain resolved")); }
7461 PCI(pc)->pcop->name = lastTargetOp->name;
7470 int condBraType = isSkipOnStatus(pc_prev);
7471 label = PCI(pc)->pcop->name;
7472 dist = findpCodeLabel(pc, label, MAX_DIST_BRA, &target);
7473 if (dist < 0) dist = -dist;
7474 //fprintf (stderr, "distance: %d (", dist); pc->print(stderr, pc);fprintf (stderr, ")\n");
7478 /* (2) remove "GOTO label; label:" */
7479 if (isLabel (pc_next, label)) {
7480 //fprintf (stderr, "(2) GOTO next instruction: ");pc->print(stderr, pc);fprintf (stderr, " --> ");pc_next->print(stderr, pc_next); fprintf(stderr, "\n");
7481 // first remove all preceeding SKIP instructions
7482 while (pc_prev && isPCI_SKIP(pc_prev)) {
7483 // attach labels on this instruction to pc_next
7484 //fprintf (stderr, "(2) preceeding SKIP removed: ");pc_prev->print(stderr, pc_prev);fprintf(stderr, "\n");
7485 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc_prev)->label, PCI(pc_next)->label);
7486 PCI(pc_prev)->label = NULL;
7487 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("(2) SKIP removed")); }
7488 pic16_unlinkpCode (pc_prev);
7489 pc_prev = pic16_findPrevInstruction (pc);
7491 // now remove the redundant goto itself
7492 PCI(pc_next)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pc_next)->label);
7493 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP("(2) GOTO next instruction removed")); }
7494 pic16_unlinkpCode (pc);
7495 pc = pic16_findPrevInstruction(pc_next->prev);
7496 isHandled = 1; // do not perform further optimizations
7502 /* (3) turn BTFSx STATUS,i; GOTO label into Bcc label if possible */
7503 if (!isHandled && condBraType != -1 && hasNoLabel(pc)) {
7504 if (dist < MAX_DIST_BCC) {
7506 switch (condBraType) {
7507 case 0x00: bcc = pic16_newpCode (POC_BC, PCI(pc)->pcop);break;
7508 // no BDC on DIGIT CARRY available
7509 case 0x02: bcc = pic16_newpCode (POC_BZ, PCI(pc)->pcop);break;
7510 case 0x03: bcc = pic16_newpCode (POC_BOV, PCI(pc)->pcop);break;
7511 case 0x04: bcc = pic16_newpCode (POC_BN, PCI(pc)->pcop);break;
7512 case 0x10: bcc = pic16_newpCode (POC_BNC, PCI(pc)->pcop);break;
7513 // no BNDC on DIGIT CARRY available
7514 case 0x12: bcc = pic16_newpCode (POC_BNZ, PCI(pc)->pcop);break;
7515 case 0x13: bcc = pic16_newpCode (POC_BNOV, PCI(pc)->pcop);break;
7516 case 0x14: bcc = pic16_newpCode (POC_BNN, PCI(pc)->pcop);break;
7518 // no replacement possible
7523 // ATTENTION: keep labels attached to BTFSx!
7524 // HINT: GOTO is label free (checked above)
7525 //fprintf (stderr, "%s:%d: (3) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(bcc)->mnemonic, label);
7526 isHandled = 1; // do not perform further optimizations
7527 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(3) conditional branch introduced")); }
7528 pic16_pCodeReplace (pc_prev, bcc);
7535 //fprintf (stderr, "(%d, too far for Bcc)\n", dist);
7541 // (4) eliminate the following (common) tripel:
7543 // labels1: Bcc label2;
7544 // GOTO somewhere; ; <-- instruction referenced by pc
7546 // and replace it by
7547 // labels1: B#(cc) somewhere; ; #(cc) is the negated condition cc
7549 // ATTENTION: all labels pointing to "Bcc label2" must be attached
7550 // to <cont.> instead
7551 // ATTENTION: This optimization is only valid if <pred.> is
7552 // not a skip operation!
7553 // ATTENTION: somewhere must be within MAX_DIST_BCC bytes!
7554 // ATTENTION: no label may be attached to the GOTO instruction!
7555 if (isConditionalBranch(pc_prev)
7556 && (!isPCI_SKIP(pic16_findPrevInstruction(pc_prev->prev)))
7557 && (dist < MAX_DIST_BCC)
7558 && isLabel(pc_next,PCI(pc_prev)->pcop->name)
7559 && hasNoLabel(pc)) {
7560 pCode *newBcc = getNegatedBcc (pc_prev, PCI(pc)->pcop);
7563 //fprintf (stderr, "%s:%d: (4) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBcc)->mnemonic, label);
7564 isHandled = 1; // do not perform further optimizations
7565 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc_prev->prev, pic16_newpCodeCharP("(4) conditional skipping branch inverted")); }
7566 pic16_pCodeReplace (pc_prev, newBcc);
7571 matchedInvertRule++;
7576 /* (5) now just turn GOTO into BRA */
7577 if (!isHandled && (PCI(pc)->op == POC_GOTO)) {
7578 if (dist < MAX_DIST_BRA) {
7579 pCode *newBra = pic16_newpCode (POC_BRA, PCI(pc)->pcop);
7580 //fprintf (stderr, "%s:%d: (5) turning %s %s into %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, label, PCI(newBra)->mnemonic, label);
7581 if (pic16_pcode_verbose) { pic16_pCodeInsertAfter(pc->prev, pic16_newpCodeCharP("(5) GOTO replaced by BRA")); }
7582 pic16_pCodeReplace (pc, newBra);
7587 //fprintf (stderr, "(%d, too far for BRA)\n", dist);
7590 } // if (!isHandled)
7597 pBlockRemoveUnusedLabels (pb);
7599 // This line enables goto chain resolution!
7600 if (matchedInvertRule > 1) matchedInvertRule = 1; else matchedInvertRule = 0;
7603 } while (change); /* fixpoint iteration per pBlock */
7606 // emit some statistics concerning goto-optimization
7608 if (pic16_debug_verbose || pic16_pcode_verbose) {
7609 fprintf (stderr, "optimize-goto:\n"
7610 "\t%5d GOTO->BRA; (%d GOTOs too far)\n"
7611 "\t%5d BTFSx, GOTO->Bcc (%d too far)\n"
7612 "\t%5d conditional \"skipping\" jumps inverted\n"
7613 "\t%5d GOTOs to next instruction removed\n"
7614 "\t%5d chained GOTOs resolved\n",
7615 opt, toofar, opt_cond, cond_toofar, opt_reorder, opt_gotonext, opt_gotochain);
7618 //fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, __FUNCTION__);
7622 #undef MAX_JUMPCHAIN_DEPTH
7623 #undef MAX_DIST_GOTO
7627 /** END OF RAPHAEL NEIDER'S ADDITIONS **/
7629 static void pBlockDestruct(pBlock *pb)
7640 /*-----------------------------------------------------------------*/
7641 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
7642 /* name dbName and combine them */
7643 /* into one block */
7644 /*-----------------------------------------------------------------*/
7645 static void mergepBlocks(char dbName)
7648 pBlock *pb, *pbmerged = NULL,*pbn;
7650 pb = the_pFile->pbHead;
7652 //fprintf(stderr," merging blocks named %c\n",dbName);
7656 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
7657 if( getpBlock_dbName(pb) == dbName) {
7659 //fprintf(stderr," merged block %c\n",dbName);
7664 pic16_addpCode2pBlock(pbmerged, pb->pcHead);
7665 /* pic16_addpCode2pBlock doesn't handle the tail: */
7666 pbmerged->pcTail = pb->pcTail;
7668 pb->prev->next = pbn;
7670 pbn->prev = pb->prev;
7675 //pic16_printpBlock(stderr, pbmerged);
7682 /*-----------------------------------------------------------------*/
7683 /* AnalyzeFlow - Examine the flow of the code and optimize */
7685 /* level 0 == minimal optimization */
7686 /* optimize registers that are used only by two instructions */
7687 /* level 1 == maximal optimization */
7688 /* optimize by looking at pairs of instructions that use the */
7690 /*-----------------------------------------------------------------*/
7692 static void AnalyzeFlow(int level)
7694 static int times_called=0;
7698 /* remove unused allocated registers before exiting */
7699 pic16_RemoveUnusedRegisters();
7704 /* if this is not the first time this function has been called,
7705 * then clean up old flow information */
7706 if(times_called++) {
7707 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7709 pic16_RegsUnMapLiveRanges();
7713 /* Phase 2 - Flow Analysis - Register Banking
7715 * In this phase, the individual flow blocks are examined
7716 * and register banking is fixed.
7720 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7721 pic16_FixRegisterBanking(pb);
7724 /* Phase 2 - Flow Analysis
7726 * In this phase, the pCode is partition into pCodeFlow
7727 * blocks. The flow blocks mark the points where a continuous
7728 * stream of instructions changes flow (e.g. because of
7729 * a call or goto or whatever).
7732 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7733 pic16_BuildFlow(pb);
7736 /* Phase 2 - Flow Analysis - linking flow blocks
7738 * In this phase, the individual flow blocks are examined
7739 * to determine their order of excution.
7742 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7746 if (pic16_options.opt_flags & OF_OPTIMIZE_DF) {
7747 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7748 pic16_createDF (pb);
7749 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
7750 pic16_vcg_dump_default (pb);
7752 //pic16_destructDF (pb);
7756 if (0) releaseStack (); // releasing is costly...
7760 /* Phase 3 - Flow Analysis - Flow Tree
7762 * In this phase, the individual flow blocks are examined
7763 * to determine their order of execution.
7766 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7767 pic16_BuildFlowTree(pb);
7770 /* Phase x - Flow Analysis - Used Banks
7772 * In this phase, the individual flow blocks are examined
7773 * to determine the Register Banks they use
7777 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7782 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7783 pic16_pCodeRegMapLiveRanges(pb);
7785 pic16_RemoveUnusedRegisters();
7786 pic16_removeUnusedRegistersDF ();
7788 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
7789 pic16_pCodeRegOptimizeRegUsage(level);
7798 for(pb = the_pFile->pbHead; pb; pb = pb->next)
7803 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7806 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7807 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7808 pcflow = pcflow->next) {
7809 FillFlow(PCFL(pcflow));
7814 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7817 for( pcflow = pic16_findNextpCode(pb->pcHead, PC_FLOW);
7818 (pcflow = pic16_findNextpCode(pcflow, PC_FLOW)) != NULL;
7819 pcflow = pcflow->next) {
7820 FlowStats(PCFL(pcflow));
7826 /* VR -- no need to analyze banking in flow, but left here :
7827 * 1. because it may be used in the future for other purposes
7828 * 2. because if omitted we'll miss some optimization done here
7830 * Perhaps I should rename it to something else
7833 /*-----------------------------------------------------------------*/
7834 /* pic16_AnalyzeBanking - Called after the memory addresses have been */
7835 /* assigned to the registers. */
7837 /*-----------------------------------------------------------------*/
7839 void pic16_AnalyzeBanking(void)
7843 /* Phase x - Flow Analysis - Used Banks
7845 * In this phase, the individual flow blocks are examined
7846 * to determine the Register Banks they use
7856 if(!the_pFile)return;
7858 if(!pic16_options.no_banksel) {
7859 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7860 // fprintf(stderr, "%s:%d: Fix register banking in pb= 0x%p\n", __FILE__, __LINE__, pb);
7861 pic16_FixRegisterBanking(pb);
7866 /*-----------------------------------------------------------------*/
7867 /* buildCallTree - Look at the flow and extract all of the calls. */
7868 /*-----------------------------------------------------------------*/
7869 static set *register_usage(pBlock *pb);
7871 static void buildCallTree(void )
7883 /* Now build the call tree.
7884 First we examine all of the pCodes for functions.
7885 Keep in mind that the function boundaries coincide
7886 with pBlock boundaries.
7888 The algorithm goes something like this:
7889 We have two nested loops. The outer loop iterates
7890 through all of the pBlocks/functions. The inner
7891 loop iterates through all of the pCodes for
7892 a given pBlock. When we begin iterating through
7893 a pBlock, the variable pc_fstart, pCode of the start
7894 of a function, is cleared. We then search for pCodes
7895 of type PC_FUNCTION. When one is encountered, we
7896 initialize pc_fstart to this and at the same time
7897 associate a new pBranch object that signifies a
7898 branch entry. If a return is found, then this signifies
7899 a function exit point. We'll link the pCodes of these
7900 returns to the matching pc_fstart.
7902 When we're done, a doubly linked list of pBranches
7903 will exist. The head of this list is stored in
7904 `the_pFile', which is the meta structure for all
7905 of the pCode. Look at the pic16_printCallTree function
7906 on how the pBranches are linked together.
7909 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7910 pCode *pc_fstart=NULL;
7911 for(pc = pb->pcHead; pc; pc = pc->next) {
7913 if(isPCI(pc) && pc_fstart) {
7914 if(PCI(pc)->is2MemOp) {
7915 r = pic16_getRegFromInstruction2(pc);
7916 if(r && !strcmp(r->name, "POSTDEC1"))
7917 PCF(pc_fstart)->stackusage++;
7919 r = pic16_getRegFromInstruction(pc);
7920 if(r && !strcmp(r->name, "PREINC1"))
7921 PCF(pc_fstart)->stackusage--;
7926 if (PCF(pc)->fname) {
7929 sprintf(buf, "%smain", port->fun_prefix);
7930 if(STRCASECMP(PCF(pc)->fname, buf) == 0) {
7931 //fprintf(stderr," found main \n");
7932 pb->cmemmap = NULL; /* FIXME do we need to free ? */
7936 pbr = Safe_calloc(1,sizeof(pBranch));
7937 pbr->pc = pc_fstart = pc;
7940 the_pFile->functions = pic16_pBranchAppend(the_pFile->functions,pbr);
7942 // Here's a better way of doing the same:
7943 addSet(&pb->function_entries, pc);
7946 // Found an exit point in a function, e.g. return
7947 // (Note, there may be more than one return per function)
7949 pBranchLink(PCF(pc_fstart), PCF(pc));
7951 addSet(&pb->function_exits, pc);
7953 } else if(isCALL(pc)) {
7954 addSet(&pb->function_calls,pc);
7961 /* This is not needed because currently all register used
7962 * by a function are stored in stack -- VR */
7964 /* Re-allocate the registers so that there are no collisions
7965 * between local variables when one function call another */
7968 // pic16_deallocateAllRegs();
7970 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
7978 /*-----------------------------------------------------------------*/
7979 /* pic16_AnalyzepCode - parse the pCode that has been generated and form */
7980 /* all of the logical connections. */
7982 /* Essentially what's done here is that the pCode flow is */
7984 /*-----------------------------------------------------------------*/
7986 void pic16_AnalyzepCode(char dbName)
7997 /* Phase 1 - Register allocation and peep hole optimization
7999 * The first part of the analysis is to determine the registers
8000 * that are used in the pCode. Once that is done, the peep rules
8001 * are applied to the code. We continue to loop until no more
8002 * peep rule optimizations are found (or until we exceed the
8003 * MAX_PASSES threshold).
8005 * When done, the required registers will be determined.
8011 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
8012 //fprintf(stderr," Analyzing pCode: PASS #%d\n",i+1);
8014 /* First, merge the labels with the instructions */
8015 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8016 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
8018 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
8019 //fprintf(stderr," analyze and merging block %c\n",dbName);
8020 pic16_pBlockMergeLabels(pb);
8023 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName));
8028 changes = OptimizepCode(dbName);
8031 } while(changes && (i++ < MAX_PASSES));
8038 /* convert a series of movff's of local regs to stack, with a single call to
8039 * a support functions which does the same thing via loop */
8040 static void pic16_convertLocalRegs2Support(pCode *pcstart, pCode *pcend, int count, regs *r, int entry)
8044 char *fname[]={"__lr_store", "__lr_restore"};
8046 // pc = pic16_newpCode(POC_CALL, pic16_popGetFromString( (entry?fname[0]:fname[1]) ));
8048 pct = pic16_findNextInstruction(pcstart->next);
8051 pct = pc->next; //pic16_findNextInstruction(pc->next);
8052 // pc->print(stderr, pc);
8053 if(isPCI(pc) && PCI(pc)->label) {
8054 pbr = PCI(pc)->label;
8055 while(pbr && pbr->pc) {
8056 PCI(pcstart)->label = pic16_pBranchAppend(PCI(pcstart)->label, pbr);
8060 // pc->print(stderr, pc);
8062 pc->prev->next = pct;
8063 pct->prev = pc->prev;
8067 } while ((pc) && (pc != pcend));
8069 /* unlink movff instructions */
8070 pcstart->next = pcend;
8071 pcend->prev = pcstart;
8075 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8076 // pic16_popCopyReg(&pic16_pc_fsr0l), pic16_popCopyReg(pic16_framepnt_lo)))); pc = pct;
8079 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_LFSR, pic16_popGetLit2(0, pic16_popGetWithString(r->name)))); pc = pct;
8080 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_MOVLW, pic16_popGetLit( count ))); pc = pct;
8081 pic16_pCodeInsertAfter(pc, pct=pic16_newpCode(POC_CALL, pic16_popGetWithString( fname[ (entry==1?0:1) ] ))); pc = pct;
8084 // pic16_pCodeInsertAfter(pc, pct = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
8085 // pic16_popCopyReg(pic16_framepnt_lo), pic16_popCopyReg(&pic16_pc_fsr0l)))); pc = pct;
8092 sym = newSymbol( fname[ entry?0:1 ], 0 );
8093 strcpy(sym->rname, fname[ entry?0:1 ]);
8094 checkAddSym(&externs, sym);
8096 // fprintf(stderr, "%s:%d adding extern symbol %s in externs\n", __FILE__, __LINE__, fname[ entry?0:1 ]);
8101 /*-----------------------------------------------------------------*/
8102 /* OptimizeLocalRegs - turn sequence of MOVFF instructions for */
8103 /* local registers to a support function call */
8104 /*-----------------------------------------------------------------*/
8105 void pic16_OptimizeLocalRegs(void)
8110 pCodeOpLocalReg *pclr;
8113 regs *r, *lastr=NULL, *firstr=NULL;
8114 pCode *pcstart=NULL, *pcend=NULL;
8119 * local_regs begin mark
8120 * MOVFF r0x01, POSTDEC1
8121 * MOVFF r0x02, POSTDEC1
8124 * MOVFF r0x0n, POSTDEC1
8125 * local_regs end mark
8127 * convert the above to the below:
8128 * MOVLW starting_register_index
8130 * MOVLW register_count
8131 * call __save_registers_in_stack
8137 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8138 inRegCount = regCount = 0;
8139 firstr = lastr = NULL;
8140 for(pc = pb->pcHead; pc; pc = pc->next) {
8142 /* hold current function name */
8143 if(pc && isPCF(pc))curFunc = PCF(pc)->fname;
8145 if(pc && (pc->type == PC_INFO)) {
8148 if(pci->type == INF_LOCALREGS) {
8149 pclr = PCOLR(pci->oper1);
8151 if((pclr->type == LR_ENTRY_BEGIN)
8152 || (pclr->type == LR_ENTRY_END))inEntry = 1;
8155 switch(pclr->type) {
8156 case LR_ENTRY_BEGIN:
8158 inRegCount = 1; regCount = 0;
8159 pcstart = pc; //pic16_findNextInstruction(pc->next);
8160 firstr = lastr = NULL;
8166 pcend = pc; //pic16_findPrevInstruction(pc->prev);
8169 if(curFunc && inWparamList(curFunc+1)) {
8170 fprintf(stderr, "sdcc: %s: warning: disabling lr-support for functionn %s\n",
8174 pic16_convertLocalRegs2Support(pcstart, pcend, regCount,
8179 firstr = lastr = NULL;
8183 if(inRegCount == -1) {
8184 // fprintf(stderr, "%s:%d registers used [%s] %d\n", __FILE__, __LINE__, inEntry?"entry":"exit", regCount);
8190 if(isPCI(pc) && (PCI(pc)->op == POC_MOVFF) && (inRegCount == 1)) {
8192 r = pic16_getRegFromInstruction(pc);
8194 r = pic16_getRegFromInstruction2(pc);
8195 if(r && (r->type == REG_GPR) && (r->pc_type == PO_GPR_TEMP)) {
8196 if(!firstr)firstr = r;
8198 // fprintf(stderr, "%s:%d\t%s\t%i\t%d/%d\n", __FILE__, __LINE__, r->name, r->rIdx);
8210 /*-----------------------------------------------------------------*/
8211 /* ispCodeFunction - returns true if *pc is the pCode of a */
8213 /*-----------------------------------------------------------------*/
8214 static bool ispCodeFunction(pCode *pc)
8217 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
8223 /*-----------------------------------------------------------------*/
8224 /* findFunction - Search for a function by name (given the name) */
8225 /* in the set of all functions that are in a pBlock */
8226 /* (note - I expect this to change because I'm planning to limit */
8227 /* pBlock's to just one function declaration */
8228 /*-----------------------------------------------------------------*/
8229 static pCode *findFunction(char *fname)
8236 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8238 pc = setFirstItem(pb->function_entries);
8241 if((pc->type == PC_FUNCTION) &&
8243 (strcmp(fname, PCF(pc)->fname)==0))
8246 pc = setNextItem(pb->function_entries);
8254 static void MarkUsedRegisters(set *regset)
8259 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
8260 // fprintf(stderr, "marking register = %s\t", r1->name);
8261 r2 = pic16_regWithIdx(r1->rIdx);
8262 // fprintf(stderr, "to register = %s\n", r2->name);
8268 static void pBlockStats(FILE *of, pBlock *pb)
8274 if(!pic16_pcode_verbose)return;
8276 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
8278 // for now just print the first element of each set
8279 pc = setFirstItem(pb->function_entries);
8281 fprintf(of,";entry: ");
8284 pc = setFirstItem(pb->function_exits);
8286 fprintf(of,";has an exit\n");
8290 pc = setFirstItem(pb->function_calls);
8292 fprintf(of,";functions called:\n");
8295 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8296 fprintf(of,"; %s\n",pic16_get_op_from_instruction(PCI(pc)));
8298 pc = setNextItem(pb->function_calls);
8302 r = setFirstItem(pb->tregisters);
8304 int n = elementsInSet(pb->tregisters);
8306 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
8309 fprintf(of, "; %s\n",r->name);
8310 r = setNextItem(pb->tregisters);
8314 fprintf(of, "; uses %d bytes of stack\n", 1+ elementsInSet(pb->tregisters));
8317 /*-----------------------------------------------------------------*/
8318 /*-----------------------------------------------------------------*/
8320 static void sequencepCode(void)
8326 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8328 pb->seq = GpCodeSequenceNumber+1;
8330 for( pc = pb->pcHead; pc; pc = pc->next)
8331 pc->seq = ++GpCodeSequenceNumber;
8337 /*-----------------------------------------------------------------*/
8338 /*-----------------------------------------------------------------*/
8339 static set *register_usage(pBlock *pb)
8342 set *registers=NULL;
8343 set *registersInCallPath = NULL;
8345 /* check recursion */
8347 pc = setFirstItem(pb->function_entries);
8354 if(pc->type != PC_FUNCTION)
8355 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
8357 pc = setFirstItem(pb->function_calls);
8358 for( ; pc; pc = setNextItem(pb->function_calls)) {
8360 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8361 char *dest = pic16_get_op_from_instruction(PCI(pc));
8363 pcn = findFunction(dest);
8365 registersInCallPath = register_usage(pcn->pb);
8367 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8372 pBlockStats(stderr,pb); // debug
8375 // Mark the registers in this block as used.
8377 MarkUsedRegisters(pb->tregisters);
8378 if(registersInCallPath) {
8379 /* registers were used in the functions this pBlock has called */
8380 /* so now, we need to see if these collide with the ones we are */
8383 regs *r1,*r2, *newreg;
8385 DFPRINTF((stderr,"comparing registers\n"));
8387 r1 = setFirstItem(registersInCallPath);
8390 r2 = setFirstItem(pb->tregisters);
8392 while(r2 && (r1->type != REG_STK)) {
8394 if(r2->rIdx == r1->rIdx) {
8395 newreg = pic16_findFreeReg(REG_GPR);
8399 DFPRINTF((stderr,"Bummer, no more registers.\n"));
8403 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
8404 r1->rIdx, newreg->rIdx));
8405 r2->rIdx = newreg->rIdx;
8406 //if(r2->name) Safe_free(r2->name);
8408 r2->name = Safe_strdup(newreg->name);
8412 newreg->wasUsed = 1;
8414 r2 = setNextItem(pb->tregisters);
8417 r1 = setNextItem(registersInCallPath);
8420 /* Collisions have been resolved. Now free the registers in the call path */
8421 r1 = setFirstItem(registersInCallPath);
8423 if(r1->type != REG_STK) {
8424 newreg = pic16_regWithIdx(r1->rIdx);
8427 r1 = setNextItem(registersInCallPath);
8431 // MarkUsedRegisters(pb->registers);
8433 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
8436 DFPRINTF((stderr,"returning regs\n"));
8438 DFPRINTF((stderr,"not returning regs\n"));
8440 DFPRINTF((stderr,"pBlock after register optim.\n"));
8441 pBlockStats(stderr,pb); // debug
8447 /*-----------------------------------------------------------------*/
8448 /* pct2 - writes the call tree to a file */
8450 /*-----------------------------------------------------------------*/
8451 static void pct2(FILE *of,pBlock *pb,int indent,int usedstack)
8455 // set *registersInCallPath = NULL;
8461 fprintf(of, "recursive function\n");
8462 return; //recursion ?
8465 pc = setFirstItem(pb->function_entries);
8472 for(i=0;i<indent;i++) // Indentation
8476 if(pc->type == PC_FUNCTION) {
8477 usedstack += PCF(pc)->stackusage;
8478 fprintf(of,"%s (stack: %i)\n",PCF(pc)->fname, usedstack);
8479 } else return; // ???
8482 pc = setFirstItem(pb->function_calls);
8483 for( ; pc; pc = setNextItem(pb->function_calls)) {
8485 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
8486 char *dest = pic16_get_op_from_instruction(PCI(pc));
8488 pcn = findFunction(dest);
8490 pct2(of,pcn->pb,indent+1, usedstack); // + PCF(pcn)->stackusage);
8492 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8500 /*-----------------------------------------------------------------*/
8501 /* pic16_printCallTree - writes the call tree to a file */
8503 /*-----------------------------------------------------------------*/
8505 void pic16_printCallTree(FILE *of)
8517 fprintf(of, "\npBlock statistics\n");
8518 for(pb = the_pFile->pbHead; pb; pb = pb->next )
8522 fprintf(of,"Call Tree\n");
8523 pbr = the_pFile->functions;
8527 if(!ispCodeFunction(pc))
8528 fprintf(of,"bug in call tree");
8531 fprintf(of,"Function: %s\n", PCF(pc)->fname);
8533 while(pc->next && !ispCodeFunction(pc->next)) {
8535 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
8536 fprintf(of,"\t%s\n",pic16_get_op_from_instruction(PCI(pc)));
8544 fprintf(of,"\n**************\n\na better call tree\n");
8545 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8550 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8551 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
8557 /*-----------------------------------------------------------------*/
8559 /*-----------------------------------------------------------------*/
8561 static void InlineFunction(pBlock *pb)
8569 pc = setFirstItem(pb->function_calls);
8571 for( ; pc; pc = setNextItem(pb->function_calls)) {
8574 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8580 if(pcn && isPCF(pcn) && (PCF(pcn)->ncalled == 0)) { /* change 0 to 1 to enable inlining */
8582 //fprintf(stderr,"Cool can inline:\n");
8583 //pcn->print(stderr,pcn);
8585 //fprintf(stderr,"recursive call Inline\n");
8586 InlineFunction(pcn->pb);
8587 //fprintf(stderr,"return from recursive call Inline\n");
8590 At this point, *pc points to a CALL mnemonic, and
8591 *pcn points to the function that is being called.
8593 To in-line this call, we need to remove the CALL
8594 and RETURN(s), and link the function pCode in with
8600 /* Remove the CALL */
8604 /* remove callee pBlock from the pBlock linked list */
8605 removepBlock(pcn->pb);
8613 /* Remove the Function pCode */
8614 pct = pic16_findNextInstruction(pcn->next);
8616 /* Link the function with the callee */
8617 pc->next = pcn->next;
8618 pcn->next->prev = pc;
8620 /* Convert the function name into a label */
8622 pbr = Safe_calloc(1,sizeof(pBranch));
8623 pbr->pc = pic16_newpCodeLabel(PCF(pcn)->fname, -1);
8625 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,pbr);
8626 PCI(pct)->label = pic16_pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
8628 /* turn all of the return's except the last into goto's */
8629 /* check case for 2 instruction pBlocks */
8630 pce = pic16_findNextInstruction(pcn->next);
8632 pCode *pce_next = pic16_findNextInstruction(pce->next);
8634 if(pce_next == NULL) {
8635 /* found the last return */
8636 pCode *pc_call_next = pic16_findNextInstruction(pc_call->next);
8638 //fprintf(stderr,"found last return\n");
8639 //pce->print(stderr,pce);
8640 pce->prev->next = pc_call->next;
8641 pc_call->next->prev = pce->prev;
8642 PCI(pc_call_next)->label = pic16_pBranchAppend(PCI(pc_call_next)->label,
8652 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8658 /*-----------------------------------------------------------------*/
8660 /*-----------------------------------------------------------------*/
8662 void pic16_InlinepCode(void)
8671 if(!functionInlining)
8674 /* Loop through all of the function definitions and count the
8675 * number of times each one is called */
8676 //fprintf(stderr,"inlining %d\n",__LINE__);
8678 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
8680 pc = setFirstItem(pb->function_calls);
8682 for( ; pc; pc = setNextItem(pb->function_calls)) {
8685 pCode *pcn = findFunction(pic16_get_op_from_instruction(PCI(pc)));
8686 if(pcn && isPCF(pcn)) {
8687 PCF(pcn)->ncalled++;
8690 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
8695 //fprintf(stderr,"inlining %d\n",__LINE__);
8697 /* Now, Loop through the function definitions again, but this
8698 * time inline those functions that have only been called once. */
8700 InlineFunction(the_pFile->pbHead);
8701 //fprintf(stderr,"inlining %d\n",__LINE__);
8703 for(pb = the_pFile->pbHead; pb; pb = pb->next)
8708 char *pic_optype_names[]={
8709 "PO_NONE", // No operand e.g. NOP
8710 "PO_W", // The working register (as a destination)
8711 "PO_WREG", // The working register (as a file register)
8712 "PO_STATUS", // The 'STATUS' register
8713 "PO_BSR", // The 'BSR' register
8714 "PO_FSR0", // The "file select register" (in PIC18 family it's one
8716 "PO_INDF0", // The Indirect register
8717 "PO_INTCON", // Interrupt Control register
8718 "PO_GPR_REGISTER", // A general purpose register
8719 "PO_GPR_BIT", // A bit of a general purpose register
8720 "PO_GPR_TEMP", // A general purpose temporary register
8721 "PO_SFR_REGISTER", // A special function register (e.g. PORTA)
8722 "PO_PCL", // Program counter Low register
8723 "PO_PCLATH", // Program counter Latch high register
8724 "PO_PCLATU", // Program counter Latch upper register
8725 "PO_PRODL", // Product Register Low
8726 "PO_PRODH", // Product Register High
8727 "PO_LITERAL", // A constant
8728 "PO_REL_ADDR", // A relative address
8729 "PO_IMMEDIATE", // (8051 legacy)
8730 "PO_DIR", // Direct memory (8051 legacy)
8731 "PO_CRY", // bit memory (8051 legacy)
8732 "PO_BIT", // bit operand.
8733 "PO_STR", // (8051 legacy)
8735 "PO_WILD" // Wild card operand in peep optimizer
8739 char *dumpPicOptype(PIC_OPTYPE type)
8741 return (pic_optype_names[ type ]);
8745 /*** BEGIN of stuff belonging to the BANKSEL optimization ***/
8748 #define MAX_COMMON_BANK_SIZE 32
8749 #define FIRST_PSEUDO_BANK_NR 1000
8751 hTab *sym2bank = NULL; // <OPERAND NAME> --> <PSEUDO BANK NR>
8752 hTab *bank2sym = NULL; // <PSEUDO BANK NR> --> <OPERAND NAME>
8753 hTab *coerce = NULL; // <PSEUDO BANK NR> --> <&PSEUDOBANK>
8756 typedef enum { INVALID_BANK = -1, UNKNOWN_BANK = -2, FIXED_BANK = -3 } pseudoBankNr;
8759 pseudoBankNr bank; // number assigned to this pseudoBank
8760 unsigned int size; // number of operands assigned to this bank
8761 unsigned int ref; // number of symbols referring to this pseudoBank (for garbage collection)
8764 /*----------------------------------------------------------------------*/
8765 /* hashSymbol - hash function used to map SYMBOLs (or operands) to ints */
8766 /*----------------------------------------------------------------------*/
8767 unsigned int hashSymbol (const char *str)
8769 unsigned int res = 0;
8774 res = (res << 4) | (res >> (8 * sizeof(unsigned int) - 4));
8781 /*-----------------------------------------------------------------------*/
8782 /* compareSymbol - return 1 iff sym1 equals sym2 */
8783 /*-----------------------------------------------------------------------*/
8784 int compareSymbol (const void *sym1, const void *sym2)
8786 char *s1 = (char*) sym1;
8787 char *s2 = (char*) sym2;
8789 return (strcmp (s1,s2) == 0);
8792 /*-----------------------------------------------------------------------*/
8793 /* comparePre - return 1 iff p1 == p2 */
8794 /*-----------------------------------------------------------------------*/
8795 int comparePtr (const void *p1, const void *p2)
8800 /*----------------------------------------------------------*/
8801 /* getSymbolFromOperand - return a pointer to the symbol in */
8802 /* the given operand and its length */
8803 /*----------------------------------------------------------*/
8804 char *getSymbolFromOperand (char *op, unsigned int *len)
8809 if (!op) return NULL;
8811 // we recognize two forms of operands: SYMBOL and (SYMBOL + offset)
8813 if (*sym == '(') sym++;
8816 while (((*curr >= 'A') && (*curr <= 'Z'))
8817 || ((*curr >= 'a') && (*curr <= 'z'))
8818 || ((curr != sym) && (*curr >= '0') && (*curr <= '9'))
8819 || (*curr == '_')) {
8820 // find end of symbol [A-Za-z_]?[A-Za-z0-9]*
8828 /*--------------------------------------------------------------------------*/
8829 /* getSymFromBank - get (one) name of a symbol assigned to the given bank */
8830 /*--------------------------------------------------------------------------*/
8831 char *getSymFromBank (pseudoBankNr bank)
8835 if (bank < 0) return "<INVALID BANK NR>";
8836 return hTabFindByKey (bank2sym, bank % bank2sym->size, (void *) bank, &comparePtr);
8839 /*-----------------------------------------------------------------------*/
8840 /* getPseudoBsrFromOperand - maps a string to its corresponding pseudo */
8841 /* bank number (uses hTab sym2bank), if the */
8842 /* symbol is not yet assigned a pseudo bank it */
8843 /* is assigned one here */
8844 /*-----------------------------------------------------------------------*/
8845 pseudoBankNr getPseudoBankNrFromOperand (const char *op)
8847 static pseudoBankNr next_bank = FIRST_PSEUDO_BANK_NR;
8853 hash = hashSymbol (op) % sym2bank->size;
8854 bank = (pseudoBankNr) hTabFindByKey (sym2bank, hash, op, &compareSymbol);
8855 if (bank == (pseudoBankNr)NULL) bank = UNKNOWN_BANK;
8857 if (bank == UNKNOWN_BANK) {
8858 // create a pseudo bank for the operand
8860 hTabAddItemLong (&sym2bank, hash, (char *)op, (void *)bank);
8861 hTabAddItemLong (&bank2sym, bank, (void *) bank, (void *)op);
8862 getOrAddGNode (adj, NULL, bank); // adds the node if it does not exist yet
8863 //fprintf (stderr, "%s:%d: adding %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8865 //fprintf (stderr, "%s:%d: found %s with hash %u in bank %u\n", __FUNCTION__, __LINE__, op, hash, bank);
8873 /*--------------------------------------------------------------------*/
8874 /* isBanksel - check whether the given pCode is a BANKSEL instruction */
8875 /*--------------------------------------------------------------------*/
8876 int isBanksel (pCode *pc)
8880 if (isPCI(pc) && (PCI(pc)->op == POC_BANKSEL || PCI(pc)->op == POC_MOVLB)) {
8881 // BANKSEL <variablename> or MOVLB <banknr>
8882 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8886 // check for inline assembler BANKSELs
8887 if (isPCAD(pc) && PCAD(pc)->directive && (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0 ||
8888 STRCASECMP(PCAD(pc)->directive,"MOVLB") == 0)) {
8889 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8893 // assume pc is no BANKSEL instruction
8897 /*---------------------------------------------------------------------------------*/
8898 /* invalidatesBSR - check whether the pCodeInstruction passed in modifies the BSR */
8899 /* This method can not guarantee to find all modifications of the */
8900 /* BSR (e.g. via INDirection registers) but covers all compiler */
8901 /* generated plus some cases. */
8902 /*---------------------------------------------------------------------------------*/
8903 int invalidatesBSR(pCode *pc)
8905 // assembler directives invalidate BSR (well, they might, we don't know)
8906 if (isPCAD(pc)) return 1;
8908 // only ASMDIRs and pCodeInstructions can invalidate BSR
8909 if (!isPCI(pc)) return 0;
8911 // we have a pCodeInstruction
8913 // check for BSR modifying instructions
8914 switch (PCI(pc)->op) {
8918 case POC_RETFIE: // might be used as CALL replacement
8919 case POC_RETLW: // might be used as CALL replacement
8920 case POC_RETURN: // might be used as CALL replacement
8925 default: // other instruction do not change BSR unless BSR is an explicit operand!
8926 // TODO: check for BSR as an explicit operand (e.g. INCF BSR,F), which should be rather unlikely...!
8930 // no change of BSR possible/probable
8934 /*------------------------------------------------------------*/
8935 /* getBankFromBanksel - return the pseudo bank nr assigned to */
8936 /* the symbol referenced in this BANKSEL */
8937 /*------------------------------------------------------------*/
8938 pseudoBankNr getBankFromBanksel (pCode *pc)
8941 int data = (int)NULL;
8943 if (!pc) return INVALID_BANK;
8945 if (isPCAD(pc) && PCAD(pc)->directive) {
8946 if (STRCASECMP(PCAD(pc)->directive,"BANKSEL") == 0) {
8947 // get symbolname from PCAD(pc)->arg
8948 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8949 sym = PCAD(pc)->arg;
8950 data = getPseudoBankNrFromOperand (sym);
8951 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8952 } else if (STRCASECMP(PCAD(pc)->directive,"MOVLB")) {
8953 // get (literal) bank number from PCAD(pc)->arg
8954 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCAD(pc)->directive, PCAD(pc)->arg);
8955 assert (0 && "not yet implemented - turn off banksel optimization for now");
8957 } else if (isPCI(pc)) {
8958 if (PCI(pc)->op == POC_BANKSEL) {
8959 // get symbolname from PCI(pc)->pcop->name (?)
8960 //fprintf (stderr, "%s:%d: BANKSEL found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8961 sym = PCI(pc)->pcop->name;
8962 data = getPseudoBankNrFromOperand (sym);
8963 //fprintf (stderr, "symbol: %s, data=%i\n", sym, data);
8964 } else if (PCI(pc)->op == POC_MOVLB) {
8965 // get (literal) bank number from PCI(pc)->pcop->name
8966 fprintf (stderr, "%s:%d: MOVLB found: %s %s\n", __FUNCTION__, __LINE__, PCI(pc)->mnemonic, PCI(pc)->pcop->name);
8967 assert (0 && "not yet implemented - turn off banksel optimization for now");
8972 // no assigned bank could be found
8973 return UNKNOWN_BANK;
8978 /*------------------------------------------------------------------------------*/
8979 /* getEffectiveBank - resolves the currently assigned effective pseudo bank nr */
8980 /*------------------------------------------------------------------------------*/
8981 pseudoBankNr getEffectiveBank (pseudoBankNr bank)
8985 if (bank < FIRST_PSEUDO_BANK_NR) return bank;
8988 //fprintf (stderr, "%s:%d: bank=%d\n", __FUNCTION__, __LINE__, bank);
8989 data = (pseudoBank *) hTabFindByKey (coerce, bank % coerce->size, (void *) bank, &comparePtr);
8991 if (data->bank != bank)
8998 //fprintf (stderr, "%s:%d: effective bank=%d\n", __FUNCTION__, __LINE__, bank);
9002 /*------------------------------------------------------------------*/
9003 /* attachBsrInfo2pBlock - create a look-up table as to which pseudo */
9004 /* bank is selected at a given pCode */
9005 /*------------------------------------------------------------------*/
9007 /* Create a graph with pseudo banks as its nodes and switches between
9008 * these as edges (with the edge weight representing the absolute
9009 * number of BANKSELs from one to the other).
9010 * Removes redundand BANKSELs instead iff mod == 1.
9011 * BANKSELs update the pseudo BSR, labels invalidate the current BSR
9012 * value (setting it to 0=UNNKOWN), (R)CALLs also invalidate the
9014 * TODO: check ALL instructions operands if they modify BSR directly...
9016 * pb - the pBlock to annotate
9017 * mod - select either graph creation (0) or BANKSEL removal (1)
9019 unsigned int attachBsrInfo2pBlock (pBlock *pb, int mod)
9021 pCode *pc, *pc_next;
9022 unsigned int prevBSR = UNKNOWN_BANK, pseudoBSR = UNKNOWN_BANK;
9023 int isBankselect = 0;
9024 unsigned int banksels=0;
9028 pc = pic16_findNextInstruction(pb->pcHead);
9030 isBankselect = isBanksel (pc);
9031 pc_next = pic16_findNextInstruction (pc->next);
9033 if (!hasNoLabel (pc)) {
9034 // we don't know our predecessors -- assume different BSRs
9035 prevBSR = UNKNOWN_BANK;
9036 pseudoBSR = UNKNOWN_BANK;
9037 //fprintf (stderr, "invalidated by label at "); pc->print (stderr, pc);
9040 // check if this is a BANKSEL instruction
9042 pseudoBSR = getEffectiveBank (getBankFromBanksel(pc));
9043 //fprintf (stderr, "BANKSEL via "); pc->print (stderr, pc);
9045 if (prevBSR == pseudoBSR && pseudoBSR >= 0) {
9046 //fprintf (stderr, "removing redundant "); pc->print (stderr, pc);
9047 if (1 || pic16_pcode_verbose) pic16_pCodeInsertAfter (pc->prev, pic16_newpCodeCharP("removed redundant BANKSEL"));
9048 pic16_unlinkpCode (pc);
9052 addGEdge2 (getOrAddGNode (adj, NULL, prevBSR), getOrAddGNode (adj, NULL, pseudoBSR), 1, 0);
9057 if (!isBankselect && invalidatesBSR(pc)) {
9058 // check if this instruction invalidates the pseudoBSR
9059 pseudoBSR = UNKNOWN_BANK;
9060 //fprintf (stderr, "invalidated via "); pc->print (stderr, pc);
9063 prevBSR = pseudoBSR;
9070 /*------------------------------------------------------------------------------------*/
9071 /* assignToSameBank - returns 0 on success or an error code */
9072 /* 1 - common bank would be too large */
9073 /* 2 - assignment to fixed (absolute) bank not performed */
9075 /* This functions assumes that unsplittable operands are already assigned to the same */
9076 /* bank (e.g. all objects being referenced as (SYMBOL + offset) must be in the same */
9077 /* bank so that we can make sure the bytes are laid out sequentially in memory) */
9078 /* TODO: Symbols with an abslute address must be handled specially! */
9079 /*------------------------------------------------------------------------------------*/
9080 int assignToSameBank (int bank0, int bank1, int doAbs)
9082 int eff0, eff1, dummy;
9083 pseudoBank *pbank0, *pbank1;
9086 eff0 = getEffectiveBank (bank0);
9087 eff1 = getEffectiveBank (bank1);
9089 //fprintf (stderr, "%s:%d: bank0=%d/%d, bank1=%d/%d, doAbs=%d\n", __FUNCTION__, __LINE__, bank0, eff0, bank1, eff1, doAbs);
9091 // nothing to do if already same bank
9092 if (eff0 == eff1) return 0;
9094 if (!doAbs && (eff0 < FIRST_PSEUDO_BANK_NR || eff1 < FIRST_PSEUDO_BANK_NR))
9097 // ensure eff0 < eff1
9099 // swap eff0 and eff1
9108 // now assign bank eff1 to bank eff0
9109 pbank0 = (pseudoBank *) hTabFindByKey (coerce, eff0 % coerce->size, (void *)((char*)0+eff0), &comparePtr);
9111 pbank0 = Safe_calloc (1, sizeof (pseudoBank));
9112 pbank0->bank = eff0;
9115 hTabAddItemLong (&coerce, eff0 % coerce->size, (void *)((char*)0+eff0), (void *) pbank0);
9119 hitem = hTabSearch (coerce, eff1 % coerce->size);
9120 while (hitem && hitem->pkey != (void *)((char*)0+eff1))
9121 hitem = hitem->next;
9123 if (hitem) pbank1 = (pseudoBank *) hitem->item;
9126 fprintf (stderr, "bank #%d/%d & bank #%d/%d --> bank #%d: %u (%s & %s)\n", bank0, eff0, bank1, eff1,
9127 pbank0->bank, pbank0->size,
9128 getSymFromBank (eff0), getSymFromBank (eff1));
9132 if (pbank0->size + pbank1->size > MAX_COMMON_BANK_SIZE) {
9134 fprintf (stderr, "bank #%d: %u, bank #%d: %u --> bank #%d': %u > %u (%s,%s)\n",
9135 pbank0->bank, pbank0->size, pbank1->bank, pbank1->size,
9136 pbank0->bank, pbank0->size + pbank1->size, MAX_COMMON_BANK_SIZE,
9137 getSymFromBank (pbank0->bank), getSymFromBank (pbank1->bank));
9141 pbank0->size += pbank1->size;
9143 if (pbank1->ref == 0) Safe_free (pbank1);
9149 hitem->item = pbank0;
9151 hTabAddItemLong (&coerce, eff1 % coerce->size, (void *)((char*)0+eff1), (void *) pbank0);
9154 //fprintf (stderr, "%s:%d: leaving.\n", __FUNCTION__, __LINE__);
9159 /*----------------------------------------------------------------*/
9160 /* mergeGraphNodes - combines two nodes into one and modifies all */
9161 /* edges to and from the nodes accordingly */
9162 /* This method needs complete backedges, i.e. if (A,B) is an edge */
9163 /* then also (B,A) must be an edge (possibly with weight 0). */
9164 /*----------------------------------------------------------------*/
9165 void mergeGraphNodes (GraphNode *node1, GraphNode *node2)
9167 GraphEdge *edge, *backedge, *nextedge;
9171 assert (node1 && node2);
9172 assert (node1 != node2);
9174 // add all edges starting at node2 to node1
9177 nextedge = edge->next;
9179 backedge = getGEdge (node, node2);
9181 backweight = backedge->weight;
9184 // insert edges (node1,node) and (node,node1)
9185 addGEdge2 (node1, node, edge->weight, backweight);
9186 // remove edges (node, node2) and (node2, node)
9187 remGEdge (node2, node);
9188 remGEdge (node, node2);
9192 // now node2 should not be referenced by any other GraphNode...
9193 //remGNode (adj, node2->data, node2->hash);
9196 /*----------------------------------------------------------------*/
9197 /* showGraph - dump the current BANKSEL graph as a node/edge list */
9198 /*----------------------------------------------------------------*/
9199 void showGraph (Graph *g)
9203 pseudoBankNr bankNr;
9210 bankNr = getEffectiveBank (node->hash);
9211 assert (bankNr >= 0);
9212 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9214 bankNr = pbank->bank;
9220 fprintf (stderr, "edges from %s (bank %u, size %u) to:\n", getSymFromBank (node->hash), bankNr, size);
9223 if (edge->weight > 0)
9224 fprintf (stderr, " %4u x %s\n", edge->weight, getSymFromBank (edge->node->hash));
9231 /*---------------------------------------------------------------*/
9232 /* pic16_OptimizeBanksel - remove redundant BANKSEL instructions */
9233 /*---------------------------------------------------------------*/
9234 void pic16_OptimizeBanksel ()
9236 GraphNode *node, *node1, *node1next;
9239 // needed for more effective bank assignment (needs adjusted pic16_emit_usection())
9240 GraphEdge *edge, *backedge;
9242 int maxWeight, weight, mergeMore, absMaxWeight;
9243 pseudoBankNr curr0, curr1;
9246 pseudoBankNr bankNr;
9247 char *base_symbol0, *base_symbol1;
9252 unsigned int bankselsTotal = 0, bankselsRemoved = 0;
9254 //fprintf (stderr, "%s:%s:%d: entered.\n", __FILE__, __FUNCTION__, __LINE__);
9256 if (!the_pFile || !the_pFile->pbHead) return;
9258 adj = newGraph (NULL);
9259 sym2bank = newHashTable ( 255 );
9260 bank2sym = newHashTable ( 255 );
9261 coerce = newHashTable ( 255 );
9263 // create graph of BANKSEL relationships (node = operands, edge (A,B) iff BANKSEL B follows BANKSEL A)
9264 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9265 bankselsTotal += attachBsrInfo2pBlock (pb, 0);
9269 // assign symbols with absolute addresses to their respective bank nrs
9270 set = pic16_fix_udata;
9271 for (reg = setFirstItem (set); reg; reg = setNextItem (set)) {
9272 bankNr = reg->address >> 8;
9273 node = getOrAddGNode (adj, NULL, bankNr);
9274 bankNr = (pseudoBankNr) getEffectiveBank (getPseudoBankNrFromOperand(reg->name));
9275 assignToSameBank (node->hash, bankNr, 1);
9277 assert (bankNr >= 0);
9278 pbank = (pseudoBank *) hTabFindByKey (coerce, bankNr % coerce->size, (void *) bankNr, &comparePtr);
9280 pbank = Safe_calloc (1, sizeof (pseudoBank));
9281 pbank->bank = reg->address >> 8; //FIXED_BANK;
9284 hTabAddItemLong (&coerce, bankNr % coerce->size, (void *) bankNr, pbank);
9286 assert (pbank->bank == (reg->address >> 8));
9287 pbank->bank = reg->address >> 8; //FIXED_BANK;
9289 //fprintf (stderr, "ABS: %s (%d bytes) at %x in bank %u\n", reg->name, reg->size, reg->address, bankNr);
9294 // assign operands referring to the same symbol (which is not given an absolute address) to the same bank
9295 //fprintf (stderr, "assign operands with the same symbol to the same bank\n");
9298 if (node->hash < 0) { node = node->next; continue; }
9299 base_symbol0 = getSymbolFromOperand (getSymFromBank (getEffectiveBank(node->hash)), &len0);
9302 if (node1->hash < 0) { node1 = node1->next; continue; }
9303 node1next = node1->next;
9304 base_symbol1 = getSymbolFromOperand (getSymFromBank (getEffectiveBank (node1->hash)), &len1);
9305 if (len0 == len1 && len0 > 0 && strncmp (base_symbol0, base_symbol1, len0) == 0) {
9306 // TODO: check for symbols with absolute addresses -- these might be placed across bank boundaries!
9307 //fprintf (stderr, "merging %s and %s\n", getSymFromBank (getEffectiveBank(node->hash)), getSymFromBank (getEffectiveBank(node1->hash)));
9308 if (assignToSameBank (node->hash, node1->hash, 0)) {
9309 fprintf (stderr, "%s(%d) == %s(%d)\n", base_symbol0, len0, base_symbol1, len1);
9310 assert (0 && "Could not assign a symbol to a bank!");
9312 mergeGraphNodes (node, node1);
9314 if (node->hash < node1->hash)
9315 mergeGraphNodes (node, node1);
9317 mergeGraphNodes (node1, node); // this removes node so node->next will fail...
9327 // >>> THIS ALSO NEEDS AN UPDATED pic16_emit_usection() TO REFLECT THE BANK ASSIGNMENTS <<<
9328 // assign tightly coupled operands to the same (pseudo) bank
9329 //fprintf (stderr, "assign tightly coupled operands to the same bank\n");
9337 curr0 = getEffectiveBank (node->hash);
9338 if (curr0 < 0) { node = node->next; continue; }
9341 assert (edge->src == node);
9342 backedge = getGEdge (edge->node, edge->src);
9343 weight = edge->weight + (backedge ? backedge->weight : 0);
9344 curr1 = getEffectiveBank (edge->node->hash);
9345 if (curr1 < 0) { edge = edge->next; continue; }
9347 // merging is only useful if the items are not assigned to the same bank already...
9348 if (curr0 != curr1 && weight > maxWeight) {
9349 if (maxWeight > absMaxWeight) absMaxWeight = maxWeight;
9358 if (maxWeight > 0) {
9360 fprintf (stderr, "%s:%d: merging (%4u) %d(%s) and %d(%s)\n", __FUNCTION__, __LINE__, maxWeight,
9361 max->src->hash, getSymFromBank (max->src->hash),
9362 max->node->hash, getSymFromBank (max->node->hash));
9365 node = getGNode (adj, max->src->data, max->src->hash);
9366 node1 = getGNode (adj, max->node->data, max->node->hash);
9368 if (0 == assignToSameBank (max->src->hash, max->node->hash, 0)) {
9369 if (max->src->hash < max->node->hash)
9370 mergeGraphNodes (node, node1);
9372 mergeGraphNodes (node1, node);
9374 remGEdge (node, node1);
9375 remGEdge (node1, node);
9386 // remove redundant BANKSELs
9387 //fprintf (stderr, "removing redundant BANKSELs\n");
9388 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
9389 bankselsRemoved += attachBsrInfo2pBlock (pb, 1);
9394 fprintf (stderr, "display graph\n");
9399 //fprintf (stderr, "%s:%s:%d: leaving, %u/%u BANKSELs removed...\n", __FILE__, __FUNCTION__, __LINE__, bankselsRemoved, bankselsTotal);
9402 /*** END of stuff belonging to the BANKSEL optimization ***/
9406 /*** BEGIN of helpers for pCode dataflow optimizations ***/
9408 typedef unsigned int symbol_t;
9409 typedef unsigned int valnum_t;
9410 //typedef unsigned int hash_t;
9413 #define INT_TO_PTR(x) (((char *) 0) + (x))
9417 #define PTR_TO_INT(x) (((char *)(x)) - ((char *) 0))
9420 static int pic16_regIsLocal (regs *r);
9421 static int pic16_safepCodeRemove (pCode *pc, char *comment);
9424 static unsigned int pic16_df_removed_pcodes = 0;
9425 static unsigned int pic16_df_saved_bytes = 0;
9426 static unsigned int df_findall_sameflow = 0;
9427 static unsigned int df_findall_otherflow = 0;
9428 static unsigned int df_findall_in_vals = 0;
9430 static void pic16_df_stats () {
9432 if (pic16_debug_verbose || pic16_pcode_verbose) {
9433 fprintf (stderr, "PIC16: dataflow analysis removed %u instructions (%u bytes)\n", pic16_df_removed_pcodes, pic16_df_saved_bytes);
9434 fprintf (stderr, "findAll: same flow %u (%u in_vals), other flow %u\n", df_findall_sameflow, df_findall_in_vals, df_findall_otherflow);
9435 //pic16_df_removed_pcodes = pic16_df_saved_bytes = 0;
9439 /* Remove a pCode iff possible:
9440 * - previous pCode is no SKIP
9442 * Returns 1 iff the pCode has been removed, 0 otherwise. */
9443 static int pic16_safepCodeUnlink (pCode *pc, char *comment) {
9444 pCode *pcprev, *pcnext;
9445 char buf[256], *total=NULL;
9448 if (!comment) comment = "=DF= pCode removed by pic16_safepCodeUnlink";
9450 pcprev = pic16_findPrevInstruction (pc->prev);
9451 pcnext = pic16_findNextInstruction (pc->next);
9453 /* move labels to next instruction (if possible) */
9454 if (PCI(pc)->label && !pcnext) return 0;
9456 /* if this is a SKIP with side-effects -- do not remove */
9457 /* XXX: might try to replace this one with the side-effect only version */
9459 && ((PCI(pc)->outCond & (PCC_REGISTER | PCC_W)) != 0))
9462 switch (PCI(pc)->op)
9466 newpc = pic16_newpCode(POC_INCF, pic16_pCodeOpCopy( PCI(pc)->pcop ) );
9467 pic16_pCodeReplace( pc, newpc );
9471 newpc = pic16_newpCode(POC_INCFW, pic16_pCodeOpCopy( PCI(pc)->pcop ) );
9472 pic16_pCodeReplace( pc, newpc );
9477 newpc = pic16_newpCode(POC_INCF, pic16_pCodeOpCopy( PCI(pc)->pcop ) );
9478 pic16_pCodeReplace( pc, newpc );
9482 newpc = pic16_newpCode(POC_INCF, pic16_pCodeOpCopy( PCI(pc)->pcop ) );
9483 pic16_pCodeReplace( pc, newpc );
9492 /* if previous instruction is a skip -- do not remove */
9493 if (pcprev && isPCI_SKIP(pcprev)) {
9494 if (!pic16_safepCodeUnlink (pcprev, "=DF= removed now unused SKIP")) {
9495 /* preceeding SKIP could not be removed -- keep this instruction! */
9500 if (PCI(pc)->label) {
9501 //fprintf (stderr, "%s: moving label(s)\n", __FUNCTION__);
9502 //pc->print (stderr, pc);
9503 PCI(pcnext)->label = pic16_pBranchAppend (PCI(pc)->label, PCI(pcnext)->label);
9504 PCI(pc)->label = NULL;
9507 /* update statistics */
9508 pic16_df_removed_pcodes++;
9509 if (isPCI(pc)) pic16_df_saved_bytes += PCI(pc)->isize;
9511 /* remove the pCode */
9512 pic16_pCode2str (buf, 256, pc);
9513 //fprintf (stderr, "%s: removing pCode: %s\n", __FUNCTION__, buf);
9514 if (0 || pic16_debug_verbose || pic16_pcode_verbose) {
9515 len = strlen (buf) + strlen (comment) + 10;
9516 total = (char *) Safe_malloc (len);
9517 SNPRINTF (total, len, "%s: %s", comment, buf);
9518 pic16_pCodeInsertAfter (pc, pic16_newpCodeCharP(total));
9522 /* actually unlink it from the pBlock -- also remove from to/from lists */
9523 pic16_pCodeUnlink (pc);
9525 /* remove the pCode -- release registers */
9528 /* report success */
9533 /* ======================================================================== */
9534 /* === SYMBOL HANDLING ==================================================== */
9535 /* ======================================================================== */
9537 static hTab *map_strToSym = NULL; /** (char *) --> symbol_t */
9538 static hTab *map_symToStr = NULL; /** symbol_t -> (char *) */
9539 static symbol_t nextSymbol = 0x2000; /** next symbol_t assigned to the next generated symbol */
9541 /** Calculate a hash for a given string.
9542 * If len == 0 the string is assumed to be NUL terminated. */
9543 static hash_t symbolHash (const char *str, unsigned int len) {
9547 hash = (hash << 2) ^ *str;
9552 hash = (hash << 2) ^ *str;
9559 /** Return 1 iff strings v1 and v2 are identical. */
9560 static int symcmp (const void *v1, const void *v2) {
9561 return !strcmp ((const char *) v1, (const char *) v2);
9564 /** Return 1 iff pointers v1 and v2 are identical. */
9565 static int ptrcmp (const void *v1, const void *v2) {
9569 enum { SPO_WREG=0x1000,
9609 /* Return the unique symbol_t for the given string. */
9610 static symbol_t symFromStr (const char *str) {
9615 if (!map_symToStr) {
9617 struct { char *name; symbol_t sym; } predefsyms[] = {
9619 {"STATUS", SPO_STATUS},
9620 {"PRODL", SPO_PRODL},
9621 {"PRODH", SPO_PRODH},
9622 {"INDF0", SPO_INDF0},
9623 {"POSTDEC0", SPO_POSTDEC0},
9624 {"POSTINC0", SPO_POSTINC0},
9625 {"PREINC0", SPO_PREINC0},
9626 {"PLUSW0", SPO_PLUSW0},
9627 {"INDF1", SPO_INDF1},
9628 {"POSTDEC1", SPO_POSTDEC1},
9629 {"POSTINC1", SPO_POSTINC1},
9630 {"PREINC1", SPO_PREINC1},
9631 {"PLUSW1", SPO_PLUSW1},
9632 {"INDF2", SPO_INDF2},
9633 {"POSTDEC2", SPO_POSTDEC2},
9634 {"POSTINC2", SPO_POSTINC2},
9635 {"PREINC2", SPO_PREINC2},
9636 {"PLUSW2", SPO_PLUSW2},
9637 {"STKPTR", SPO_STKPTR},
9642 {"FSR0L", SPO_FSR0L},
9643 {"FSR0H", SPO_FSR0H},
9644 {"FSR1L", SPO_FSR1L},
9645 {"FSR1H", SPO_FSR1H},
9646 {"FSR2L", SPO_FSR2L},
9647 {"FSR2H", SPO_FSR2H},
9649 {"PCLATH", SPO_PCLATH},
9650 {"PCLATU", SPO_PCLATU},
9651 {"TABLAT", SPO_TABLAT},
9652 {"TBLPTRL", SPO_TBLPTRL},
9653 {"TBLPTRH", SPO_TBLPTRH},
9654 {"TBLPTRU", SPO_TBLPTRU},
9658 map_strToSym = newHashTable (128);
9659 map_symToStr = newHashTable (128);
9661 for (i=0; predefsyms[i].name; i++) {
9664 /* enter new symbol */
9665 sym = predefsyms[i].sym;
9666 name = predefsyms[i].name;
9667 res = Safe_strdup (name);
9668 hash = symbolHash (name, 0);
9670 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9671 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9675 hash = symbolHash (str, 0) % map_strToSym->size;
9677 /* find symbol in table */
9678 sym = PTR_TO_INT(hTabFindByKey (map_strToSym, hash, str, &symcmp));
9680 //fprintf (stderr, "found symbol %x for %s\n", sym, str);
9684 /* enter new symbol */
9686 res = Safe_strdup (str);
9688 hTabAddItemLong (&map_strToSym, hash, res, INT_TO_PTR(sym));
9689 hTabAddItemLong (&map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), res);
9691 //fprintf (stderr, "created symbol %x for %s\n", sym, res);
9697 static const char *strFromSym (symbol_t sym) {
9698 return (const char *) hTabFindByKey (map_symToStr, sym % map_symToStr->size, INT_TO_PTR(sym), &ptrcmp);
9702 /* ======================================================================== */
9703 /* === DEFINITION MAP HANDLING ============================================ */
9704 /* ======================================================================== */
9706 /* A defmap provides information about which symbol is defined by which pCode.
9707 * The most recent definitions are prepended to the list, so that the most
9708 * recent definition can be found by forward scanning the list.
9709 * pc2: MOVFF r0x00, r0x01
9711 * head --> ("r0x01",pc1,42) --> ("STATUS",pc1,44) --> ("r0x01",pc2,28) --> NULL
9713 * We attach one defmap to each flow object, and each pCode will occur at
9714 * least once in its flow's defmap (maybe defining the 0 symbol). This can be
9715 * used to find definitions for a pCode in its own defmap that precede pCode.
9718 typedef struct defmap_s {
9719 symbol_t sym; /** symbol this item refers to */
9722 unsigned int in_mask:8; /** mask leaving in accessed bits */
9723 unsigned int mask:8; /** mask leaving in modified bits (if isWrite) */
9724 int isRead:1; /** sym/mask is read */
9725 int isWrite:1; /** sym/mask is written */
9729 pCode *pc; /** pCode this symbol is refrenced at */
9730 valnum_t in_val; /** valnum_t of symbol's previous value (the one read at pc) */
9731 valnum_t val; /** new unique number for this value (if isWrite) */
9732 struct defmap_s *prev, *next; /** link to previous an next definition */
9735 static defmap_t *defmap_free = NULL; /** list of unused defmaps */
9736 static int defmap_free_count = 0; /** number of released defmap items */
9738 /* Returns a defmap_t with the specified data; this will be the new list head.
9739 * next - pointer to the current list head */
9740 static defmap_t *newDefmap (symbol_t sym, int in_mask, int mask, int isRead, int isWrite, pCode *pc, valnum_t val, defmap_t *next) {
9745 defmap_free = map->next;
9746 --defmap_free_count;
9748 map = (defmap_t *) Safe_calloc (1, sizeof (defmap_t));
9751 map->acc.access.in_mask = (isRead ? (in_mask ? in_mask : 0xFF) : 0x00);
9752 map->acc.access.mask = (isWrite ? (mask ? mask : 0xFF) : 0x00);
9753 map->acc.access.isRead = (isRead != 0);
9754 map->acc.access.isWrite = (isWrite != 0);
9757 map->val = (isWrite ? val : 0);
9760 if (next) next->prev = map;
9765 /* Returns a copy of the single defmap item. */
9766 static defmap_t *copyDefmap (defmap_t *map) {
9767 defmap_t *res = (defmap_t *) Safe_malloc (sizeof (defmap_t));
9768 memcpy (res, map, sizeof (defmap_t));
9774 /* Insert a defmap item after the specified one. */
9775 static int defmapInsertAfter (defmap_t *ref, defmap_t *newItem) {
9776 if (!ref || !newItem) return 1;
9778 newItem->next = ref->next;
9779 newItem->prev = ref;
9780 ref->next = newItem;
9781 if (newItem->next) newItem->next->prev = newItem;
9786 /* Check whether item (or an identical one) is already in the chain and add it if neccessary.
9787 * item is copied before insertion into chain and therefore left untouched.
9788 * Returns 1 iff the item has been inserted into the list, 0 otherwise. */
9789 static int defmapAddCopyIfNew (defmap_t **head, defmap_t *item) {
9792 while (dummy && (dummy->sym != item->sym
9793 || dummy->pc != item->pc
9794 || dummy->acc.accessmethod != item->acc.accessmethod
9795 || dummy->val != item->val
9796 || dummy->in_val != item->in_val)) {
9797 dummy = dummy->next;
9800 /* item already present? */
9801 if (dummy) return 0;
9803 /* otherwise: insert copy of item */
9804 dummy = copyDefmap (item);
9805 dummy->next = *head;
9806 if (*head) (*head)->prev = dummy;
9812 /* Releases a defmap. This also removes the map from its chain -- update the head manually! */
9813 static void deleteDefmap (defmap_t *map) {
9816 /* unlink from chain -- fails for the first item (head is not updated!) */
9817 if (map->next) map->next->prev = map->prev;
9818 if (map->prev) map->prev->next = map->next;
9821 memset (map, 0, sizeof (defmap_t));
9823 /* save for future use */
9824 map->next = defmap_free;
9826 ++defmap_free_count;
9829 /* Release all defmaps referenced from map. */
9830 static void deleteDefmapChain (defmap_t **_map) {
9831 defmap_t *map, *next;
9837 /* find list head */
9838 while (map && map->prev) map = map->prev;
9840 /* delete all items */
9850 /* Free all defmap items. */
9851 static void freeDefmap (defmap_t **_map) {
9859 /* find list head */
9860 while (map->prev) map = map->prev;
9862 /* release all items */
9872 /* Returns the most recent definition for the given symbol preceeding pc.
9873 * If no definition is found, NULL is returned.
9874 * If pc == NULL the whole list is scanned. */
9875 static defmap_t *defmapFindDef (defmap_t *map, symbol_t sym, pCode *pc) {
9876 defmap_t *curr = map;
9879 /* skip all definitions up to pc */
9880 while (curr && (curr->pc != pc)) curr = curr->next;
9882 /* pc not in the list -- scan the whole list for definitions */
9884 fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9887 /* skip all definitions performed by pc */
9888 while (curr && (curr->pc == pc)) curr = curr->next;
9892 /* find definition for sym */
9893 while (curr && (!curr->acc.access.isWrite || (curr->sym != sym))) {
9901 /* Returns the first use (read) of the given symbol AFTER pc.
9902 * If no such use is found, NULL is returned.
9903 * If pc == NULL the whole list is scanned. */
9904 static defmap_t *defmapFindUse (defmap_t *map, symbol_t sym, pCode *pc) {
9905 defmap_t *curr = map, *prev = NULL;
9908 /* skip all definitions up to pc */
9909 while (curr && (curr->pc != pc)) { prev = curr; curr = curr->next; }
9911 /* pc not in the list -- scan the whole list for definitions */
9913 //fprintf (stderr, "pc %p not found in defmap -- scanning whole list for symbol '%s'\n", pc, strFromSym (sym));
9917 /* find end of list */
9918 while (curr && curr->next) curr = curr->next;
9921 /* find use of sym (scan list backwards) */
9922 while (curr && (!curr->acc.access.isRead || (curr->sym != sym))) curr = curr->prev;
9928 /* Return the defmap entry for sym AT pc.
9929 * If none is found, NULL is returned.
9930 * If more than one entry is found an assertion is triggered. */
9931 static defmap_t *defmapCurr (defmap_t *map, symbol_t sym, pCode *pc) {
9932 defmap_t *res = NULL;
9934 /* find entries for pc */
9935 while (map && map->pc != pc) map = map->next;
9937 /* find first entry for sym @ pc */
9938 while (map && map->pc == pc && map->sym != sym) map = map->next;
9940 /* no entry found */
9941 if (!map) return NULL;
9943 /* check for more entries */
9946 while (map && map->pc == pc) {
9947 /* more than one entry for sym @ pc found? */
9948 assert (map->sym != sym);
9952 /* return single entry for sym @ pc */
9956 /* Modifies the definition of sym at pCode to newval.
9957 * Returns 0 on success, 1 if no definition of sym in pc has been found.
9959 static int defmapUpdate (defmap_t *map, symbol_t sym, pCode *pc, valnum_t newval) {
9962 /* find definitions of pc */
9963 while (m && m->pc != pc) m = m->next;
9965 /* find definition of sym at pc */
9966 while (m && m->pc == pc && (!m->acc.access.isWrite || (m->sym != sym))) m = m->next;
9968 /* no definition found */
9974 /* update following uses of sym */
9975 while (m && m->pc == pc) m = m->prev;
9977 if (m->sym == sym) {
9979 if (m->acc.access.isWrite) m = NULL;
9987 /* ======================================================================== */
9988 /* === STACK ROUTINES ===================================================== */
9989 /* ======================================================================== */
9991 typedef struct stack_s {
9993 struct stack_s *next;
9996 typedef stackitem_t *dynstack_t;
9997 static stackitem_t *free_stackitems = NULL;
9999 /* Create a stack with one item. */
10000 static dynstack_t *newStack () {
10001 dynstack_t *s = (dynstack_t *) Safe_malloc (sizeof (dynstack_t));
10006 /* Remove a stack -- its items are only marked free. */
10007 static void deleteStack (dynstack_t *s) {
10013 i->next = free_stackitems;
10014 free_stackitems = i;
10019 /* Release all stackitems. */
10020 static void releaseStack () {
10023 while (free_stackitems) {
10024 i = free_stackitems->next;
10025 Safe_free(free_stackitems);
10026 free_stackitems = i;
10030 static void stackPush (dynstack_t *stack, void *data) {
10033 if (free_stackitems) {
10034 i = free_stackitems;
10035 free_stackitems = free_stackitems->next;
10037 i = (stackitem_t *) Safe_calloc (1, sizeof (stackitem_t));
10044 static void *stackPop (dynstack_t *stack) {
10048 if (stack && *stack) {
10049 data = (*stack)->data;
10051 *stack = (*stack)->next;
10052 i->next = free_stackitems;
10053 free_stackitems = i;
10061 static int stackContains (dynstack_t *s, void *data) {
10066 if (i->data == data) return 1;
10075 static int stackIsEmpty (dynstack_t *s) {
10076 return (*s == NULL);
10085 static state_t *newState (pCodeFlow *flow, defmap_t *lastdef) {
10086 state_t *s = (state_t *) Safe_calloc (1, sizeof (state_t));
10088 s->lastdef = lastdef;
10092 static void deleteState (state_t *s) {
10096 static int stateIsNew (state_t *state, dynstack_t *todo, dynstack_t *done) {
10099 /* scan working list for state */
10103 /* is i == state? -- state not new */
10104 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10112 /* is i == state? -- state not new */
10113 if ((((state_t *) (i->data))->flow == state->flow) && (((state_t *) (i->data))->lastdef == state->lastdef)) return 0;
10118 /* not found -- state is new */
10122 static inline valnum_t newValnum ();
10124 const char *pic16_pBlockGetFunctionName (pBlock *pb) {
10127 if (!pb) return "<unknown function>";
10129 pc = pic16_findNextpCode (pb->pcHead, PC_FUNCTION);
10130 if (pc && isPCF(pc)) return PCF(pc)->fname;
10131 else return "<unknown function>";
10134 static defmap_t *pic16_pBlockAddInval (pBlock *pb, symbol_t sym) {
10138 pcfl = PCI(pic16_findNextInstruction (pb->pcHead))->pcflow;
10140 /* find initial value (assigning pc == NULL) */
10141 map = PCFL(pcfl)->in_vals;
10142 while (map && map->sym != sym) map = map->next;
10144 /* initial value already present? */
10146 //fprintf (stderr, "found init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10150 /* create a new initial value */
10151 map = newDefmap (sym, 0x00, 0xff, 0, 1, NULL, newValnum(), PCFL(pcfl)->in_vals);
10152 PCFL(pcfl)->in_vals = map;
10153 //fprintf (stderr, "Created init value for sym %s (%x): %u\n", strFromSym(sym), sym, map->val);
10157 /* insert map as last item in pcfl's defmap */
10158 if (!prev) prev = PCFL(pcfl)->defmap;
10160 PCFL(pcfl)->defmap = map;
10162 while (prev->next) prev = prev->next;
10171 /* Find all reaching definitions for sym at pc.
10172 * A new (!) list of definitions is returned.
10173 * Returns the number of reaching definitions found.
10174 * The defining defmap entries are returned in *chain.
10176 static int defmapFindAll (symbol_t sym, pCode *pc, defmap_t **chain) {
10181 pCodeFlowLink *succ;
10183 dynstack_t *todo; /** stack of state_t */
10184 dynstack_t *done; /** stack of state_t */
10186 int firstState, n_defs;
10188 assert (pc && isPCI(pc) && PCI(pc)->pcflow);
10191 /* initialize return list */
10194 /* wildcard symbol? */
10195 if (!sym) return 0;
10197 //fprintf (stderr, "Searching definition of sym %s(%x) @ pc %p(%p)\n", strFromSym(sym), sym, pc, pc->pb);
10199 map = PCI(pc)->pcflow->defmap;
10201 res = defmapFindDef (map, sym, pc);
10202 //if (res) fprintf (stderr, "found def in own flow @ pc %p\n", res->pc);
10204 #define USE_PRECALCED_INVALS 1
10205 #if USE_PRECALCED_INVALS
10206 if (!res && PCI(pc)->pcflow->in_vals) {
10207 res = defmapFindDef (PCI(pc)->pcflow->in_vals, sym, NULL);
10209 //fprintf (stderr, "found def in init values\n");
10210 df_findall_in_vals++;
10216 // found a single definition (in pc's flow)
10217 //fprintf (stderr, "unique definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10218 defmapAddCopyIfNew (chain, res);
10219 df_findall_sameflow++;
10223 #if USE_PRECALCED_INVALS
10225 defmapAddCopyIfNew (chain, pic16_pBlockAddInval (pc->pb, sym));
10231 #define FORWARD_FLOW_ANALYSIS 1
10232 #if defined FORWARD_FLOW_ANALYSIS && FORWARD_FLOW_ANALYSIS
10233 /* no definition found in pc's flow preceeding pc */
10234 todo = newStack ();
10235 done = newStack ();
10236 n_defs = 0; firstState = 1;
10237 stackPush (todo, newState (PCI(pic16_findNextInstruction(pc->pb->pcHead))->pcflow, res));
10239 while (!stackIsEmpty (todo)) {
10240 state = (state_t *) stackPop (todo);
10241 stackPush (done, state);
10242 curr = state->flow;
10243 res = state->lastdef;
10244 //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);
10246 /* there are no definitions BEFORE pc in pc's flow (see above) */
10247 if (curr == PCI(pc)->pcflow) {
10249 //fprintf (stderr, "symbol %s(%x) might be used uninitialized at %p\n", strFromSym(sym), sym, pc);
10250 res = pic16_pBlockAddInval (pc->pb, sym);
10251 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10254 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10255 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10259 /* save last definition of sym in this flow as initial def in successors */
10260 res = defmapFindDef (curr->defmap, sym, NULL);
10261 if (!res) res = state->lastdef;
10263 /* add successors to working list */
10264 state = newState (NULL, NULL);
10265 succ = (pCodeFlowLink *) setFirstItem (curr->to);
10267 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10268 state->flow = succ->pcflow;
10269 state->lastdef = res;
10270 if (stateIsNew (state, todo, done)) {
10271 stackPush (todo, state);
10272 state = newState (NULL, NULL);
10274 succ = (pCodeFlowLink *) setNextItem (curr->to);
10276 deleteState (state);
10279 #else // !FORWARD_FLOW_ANALYSIS
10281 /* no definition found in pc's flow preceeding pc */
10282 todo = newStack ();
10283 done = newStack ();
10284 n_defs = 0; firstState = 1;
10285 stackPush (todo, newState (PCI(pc)->pcflow, res));
10287 while (!stackIsEmpty (todo)) {
10288 state = (state_t *) stackPop (todo);
10289 curr = state->flow;
10293 /* only check predecessor flows */
10295 /* get (last) definition of sym in this flow */
10296 res = defmapFindDef (curr->defmap, sym, NULL);
10300 /* definition found */
10301 //fprintf (stderr, "reaching definition for %s @ %p found @ %p (val: %x)\n", strFromSym(sym), pc, res->pc, res->val);
10302 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10304 /* no definition found -- check predecessor flows */
10305 state = newState (NULL, NULL);
10306 succ = (pCodeFlowLink *) setFirstItem (curr->from);
10308 /* if no flow predecessor available -- sym might be uninitialized */
10310 //fprintf (stder, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10311 res = newDefmap (sym, 0xff, 0, 1, NULL, 0, *chain);
10312 if (defmapAddCopyIfNew (chain, res)) n_defs++;
10313 deleteDefmap (res); res = NULL;
10317 //fprintf (stderr, " %p --> %p with %x\n", curr, succ->pcflow, res ? res->val : 0);
10318 state->flow = succ->pcflow;
10319 state->lastdef = res;
10320 if (stateIsNew (state, todo, done)) {
10321 stackPush (todo, state);
10322 state = newState (NULL, NULL);
10324 succ = (pCodeFlowLink *) setNextItem (curr->from);
10326 deleteState (state);
10332 /* clean up done stack */
10333 while (!stackIsEmpty(done)) {
10334 deleteState ((state_t *) stackPop (done));
10336 deleteStack (done);
10338 /* return number of items in result set */
10340 //fprintf (stderr, "sym %s might be used uninitialized at %p\n", strFromSym (sym), pc);
10341 } else if (n_defs == 1) {
10343 //fprintf (stderr, "sym %s at %p always defined as %x @ %p\n", strFromSym(sym), pc, (*chain)->val, (*chain)->pc);
10344 } else if (n_defs > 0) {
10345 //fprintf (stderr, "%u definitions for sym %s at %p found:\n", n_defs, strFromSym(sym), pc);
10349 fprintf (stderr, " as %4x @ %p\n", res->val, res->pc);
10354 //fprintf (stderr, "%u definitions for sym %s at %p found\n", n_defs, strFromSym(sym), pc);
10355 df_findall_otherflow++;
10359 /* ======================================================================== */
10360 /* === VALUE NUMBER HANDLING ============================================== */
10361 /* ======================================================================== */
10363 static valnum_t nextValnum = 0x1000;
10364 static hTab *map_symToValnum = NULL;
10366 /** Return a new value number. */
10367 static inline valnum_t newValnum () {
10368 return (nextValnum += 4);
10371 static valnum_t valnumFromStr (const char *str) {
10376 sym = symFromStr (str);
10378 if (!map_symToValnum) {
10379 map_symToValnum = newHashTable (128);
10382 /* literal already known? */
10383 res = hTabFindByKey (map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), &ptrcmp);
10385 /* return existing valnum */
10386 if (res) return (valnum_t) PTR_TO_INT(res);
10388 /* create new valnum */
10390 hTabAddItemLong (&map_symToValnum, sym % map_symToValnum->size, INT_TO_PTR(sym), INT_TO_PTR(val));
10391 //fprintf (stderr, "NEW VALNUM %x for symbol %s\n", val, str);
10395 /* Create a valnum for a literal. */
10396 static valnum_t valnumFromLit (unsigned int lit) {
10397 return ((valnum_t) 0x100 + (lit & 0x0FF));
10400 /* Return the (positive) literal value represented by val
10401 * or -1 iff val is no known literal's valnum. */
10402 static int litFromValnum (valnum_t val) {
10403 if (val >= 0x100 && val < 0x200) {
10404 /* valnum is a (known) literal */
10405 return val & 0x00FF;
10407 /* valnum is not a known literal */
10413 /* Sanity check - all flows in a block must be reachable from initial flow. */
10414 static int verifyAllFlowsReachable (pBlock *pb) {
10420 pCodeFlowLink *succ;
10423 //fprintf (stderr, "%s - started for %s.\n" ,__FUNCTION__, pic16_pBlockGetFunctionName (pb));
10426 flowInBlock = NULL;
10428 /* mark initial flow as reached (and "not needs to be reached") */
10429 pc = pic16_findNextpCode (pb->pcHead, PC_FLOW);
10431 addSetHead (&reached, pc);
10432 addSetHead (&checked, pc);
10434 /* mark all further flows in block as "need to be reached" */
10437 if (isPCI(pc)) addSetIfnotP (&flowInBlock, PCI(pc)->pcflow);
10438 pc = pic16_findNextInstruction (pc->next);
10441 while (reached && (pcfl = (pCodeFlow *)indexSet (reached, 0)) != NULL) {
10442 /* mark as reached and "not need to be reached" */
10443 deleteSetItem (&reached, pcfl);
10444 //fprintf (stderr, "%s - checking %p\n" ,__FUNCTION__, pcfl);
10446 /* flow is no longer considered unreachable */
10447 deleteSetItem (&flowInBlock, pcfl);
10449 for (succ = setFirstItem (pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10450 if (!isinSet (checked, succ->pcflow)) {
10451 /* flow has never been reached before */
10452 addSetHead (&reached, succ->pcflow);
10453 addSetHead (&checked, succ->pcflow);
10458 //fprintf (stderr, "%s - finished\n", __FUNCTION__);
10460 /* by now every flow should have been reached
10461 * --> flowInBlock should be empty */
10462 res = (flowInBlock == NULL);
10466 fprintf (stderr, "not all flows reached in %s:\n", pic16_pBlockGetFunctionName (pb));
10467 while (flowInBlock) {
10468 pcfl = indexSet (flowInBlock, 0);
10469 fprintf (stderr, "not reached: flow %p\n", pcfl);
10470 deleteSetItem (&flowInBlock, pcfl);
10476 deleteSet (&reached);
10477 deleteSet (&flowInBlock);
10478 deleteSet (&checked);
10480 /* if we reached every flow, succ is NULL by now... */
10481 //assert (res); // will fire on unreachable code...
10486 /* Checks a flow for accesses to sym AFTER pc.
10488 * Returns -1 if the symbol is read in this flow (before redefinition),
10489 * returns 0 if the symbol is redefined in this flow or
10490 * returns a mask [0x01 -- 0xFF] indicating the bits still alive after this flow.
10492 int pic16_isAliveInFlow (symbol_t sym, int mask, pCodeFlow *pcfl, pCode *pc) {
10493 defmap_t *map, *mappc;
10495 /* find pc or start of definitions */
10496 map = pcfl->defmap;
10497 while (map && (map->pc != pc) && map->next) map = map->next;
10498 /* if we found pc -- ignore it */
10499 while (map && map->pc == pc) map = map->prev;
10501 /* scan list backwards (first definition first) */
10502 while (map && mask) {
10503 // if (map->sym == sym) {
10504 //fprintf (stderr, "%s: accessing sym %s in pc %p/map %p\n", __FUNCTION__, strFromSym(sym), map->pc, map);
10506 /* scan list for reads at this pc first */
10507 while (map && map->pc == mappc->pc) {
10508 /* is the symbol (partially) read? */
10509 if ((map->sym == sym) && (map->acc.access.isRead && ((map->acc.access.in_mask & mask) != 0))) {
10510 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s read at pc %p\n", __FUNCTION__, strFromSym (sym), map->pc);
10517 while (map && map->pc == mappc->pc) {
10518 /* honor (partial) redefinitions of sym */
10519 if ((map->sym == sym) && (map->acc.access.isWrite)) {
10520 mask &= ~map->acc.access.mask;
10521 //if (sym != SPO_STATUS) fprintf (stderr, "%s: symbol %s redefined at pc %p, alive mask: %x\n", __FUNCTION__, strFromSym (sym), map->pc, mask);
10526 /* map already points to the first defmap for the next pCode */
10527 //map = mappc->prev;
10530 /* the symbol is not completely redefined in this flow and not accessed -- symbol
10531 * is still alive; return the appropriate mask of alive bits */
10535 /* Check whether a symbol is alive (AFTER pc). */
10536 static int pic16_isAlive (symbol_t sym, pCode *pc) {
10539 dynstack_t *todo, *done;
10542 pCodeFlowLink *succ;
10546 assert (isPCI(pc));
10547 pcfl = PCI(pc)->pcflow;
10548 map = pcfl->defmap;
10550 todo = newStack ();
10551 done = newStack ();
10553 state = newState (pcfl, (defmap_t *) INT_TO_PTR(mask));
10554 stackPush (todo, state);
10557 while (!stackIsEmpty (todo)) {
10558 state = (state_t *) stackPop (todo);
10559 pcfl = state->flow;
10560 mask = PTR_TO_INT(state->lastdef);
10561 if (visit) stackPush (done, state); else deleteState(state);
10562 //fprintf (stderr, "%s: checking flow %p for symbol %s (%x)/%x\n", __FUNCTION__, pcfl, strFromSym(sym), sym, mask);
10563 // make sure flows like A(i1,i2,pc,i3,...) --> A with pc reading and writing sym are handled correctly!
10564 mask = pic16_isAliveInFlow (sym, mask, pcfl, visit == 0 ? pc : NULL);
10567 /* symbol is redefined in flow before use -- not alive in this flow (maybe in others?) */
10568 if (mask == 0) continue;
10570 /* symbol is (partially) read before redefinition in flow */
10571 if (mask == -1) break;
10573 /* symbol is neither read nor completely redefined -- check successor flows */
10574 for (succ = setFirstItem(pcfl->to); succ; succ = setNextItem (pcfl->to)) {
10575 state = newState (succ->pcflow, (defmap_t *) INT_TO_PTR(mask));
10576 if (stateIsNew (state, todo, done)) {
10577 stackPush (todo, state);
10579 deleteState (state);
10584 while (!stackIsEmpty (todo)) deleteState ((state_t *) stackPop (todo));
10585 while (!stackIsEmpty (done)) deleteState ((state_t *) stackPop (done));
10587 /* symbol is read in at least one flow -- is alive */
10588 if (mask == -1) return 1;
10590 /* symbol is read in no flow */
10594 /* Returns whether access to the given symbol has side effects. */
10595 static int pic16_symIsSpecial (symbol_t sym) {
10596 //fprintf (stderr, "%s: sym=%x\n", __FUNCTION__, sym);
10616 /* no special effects known */
10623 /* Check whether a register should be considered local (to the current function) or not. */
10624 static int pic16_regIsLocal (regs *r) {
10627 if (r->type == REG_TMP) return 1;
10629 sym = symFromStr (r->name);
10632 case SPO_FSR0L: // used in ptrget/ptrput
10633 case SPO_FSR0H: // ... as well
10634 case SPO_FSR1L: // used as stack pointer... (so not really local but shared among function calls)
10635 case SPO_FSR1H: // ... as well
10636 case SPO_FSR2L: // used as frame pointer
10637 case SPO_FSR2H: // ... as well
10638 case SPO_PRODL: // used to return values from functions
10639 case SPO_PRODH: // ... as well
10640 /* these registers (and some more...) are considered local */
10644 /* for unknown regs: check is marked local, leave if not */
10648 //fprintf (stderr, "%s: non-local reg used: %s\n", __FUNCTION__, r->name);
10654 /* if in doubt, assume non-local... */
10658 /* Check all symbols touched by pc whether their newly assigned values are read.
10659 * Returns 0 if no symbol is used later on, 1 otherwise. */
10660 static int pic16_pCodeIsAlive (pCode *pc) {
10661 pCodeInstruction *pci;
10662 defmap_t *map, *lastpc;
10665 /* we can only handle PCIs */
10666 if (!isPCI(pc)) return 1;
10668 //pc->print (stderr, pc);
10671 assert (pci && pci->pcflow && pci->pcflow->defmap);
10673 /* NEVER remove instructions with implicit side effects */
10676 case POC_TBLRD_POSTINC: /* modify TBLPTRx */
10677 case POC_TBLRD_POSTDEC:
10678 case POC_TBLRD_PREINC:
10679 case POC_TBLWT: /* modify program memory */
10680 case POC_TBLWT_POSTINC: /* modify TBLPTRx */
10681 case POC_TBLWT_POSTDEC:
10682 case POC_TBLWT_PREINC:
10683 case POC_CLRWDT: /* clear watchdog timer */
10684 case POC_PUSH: /* should be safe to remove though... */
10685 case POC_POP: /* should be safe to remove though... */
10690 //fprintf (stderr, "%s: instruction with implicit side effects not removed: %s\n", __FUNCTION__, pci->mnemonic);
10694 /* no special instruction */
10698 /* prevent us from removing assignments to non-local variables */
10700 if (PCI(pc)->outCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10701 else if (PCI(pc)->outCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10703 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10704 /* assignment to DIRECT operand like "BSF (_global + 1),6" */
10705 //fprintf (stderr, "%s: assignment to register detected, but register not available!\n", __FUNCTION__);
10706 //pc->print (stderr, pc);
10709 if ((PCI(pc)->outCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10710 //fprintf (stderr, "%s: dest-reg not local %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10715 /* OVERKILL: prevent us from removing reads from non-local variables
10716 * THIS IS HERE TO AVOID PROBLEMS WITH VOLATILE OPERANDS ONLY!
10717 * Once registers get a "isVolatile" field this might be handled more efficiently... */
10719 if (PCI(pc)->inCond & PCC_REGISTER) checkreg = pic16_getRegFromInstruction (pc);
10720 else if (PCI(pc)->inCond & PCC_REGISTER2) checkreg = pic16_getRegFromInstruction2(pc);
10722 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !checkreg) {
10723 /* read from DIRECT operand like "BTFSS (_global + 1),6" -- might be volatile */
10724 //fprintf (stderr, "%s: read from register detected, but register not available!\n", __FUNCTION__);
10725 //pc->print (stderr, pc);
10728 if ((PCI(pc)->inCond & (PCC_REGISTER | PCC_REGISTER2)) && !pic16_regIsLocal (checkreg)) {
10729 //fprintf (stderr, "%s: src-reg not local: %s\n", __FUNCTION__, checkreg ? checkreg->name : "<unknown>");
10734 /* now check that the defined symbols are not used */
10735 map = pci->pcflow->defmap;
10737 /* find items for pc */
10738 while (map && map->pc != pc) map = map->next;
10740 /* no entries found? something is fishy with DF analysis... -- play safe */
10742 if (pic16_pcode_verbose) {
10743 fprintf (stderr, "%s: defmap not found\n", __FUNCTION__);
10748 /* remember first item assigned to pc for later use */
10751 /* check all symbols being modified by pc */
10752 while (map && map->pc == pc) {
10753 if (map->sym == 0) { map = map->next; continue; }
10755 /* keep pc if it references special symbols (like POSTDEC0) */
10759 pic16_pCode2str (buf, 256, pc);
10760 fprintf (stderr, "%s: checking for sym %x(%s) at pc %p (%s)\n", __FUNCTION__, map->sym, strFromSym (map->sym), pc, buf);
10763 if (pic16_symIsSpecial (map->sym)) {
10764 //fprintf (stderr, "%s: special sym\n", __FUNCTION__);
10767 if (map->acc.access.isWrite) {
10768 if (pic16_isAlive (map->sym, pc)) {
10769 //fprintf (stderr, "%s(%s): pCode is alive (sym %s still used)\n", __FUNCTION__, pic16_pBlockGetFunctionName (pc->pb),strFromSym (map->sym));
10776 /* no use for any of the pc-assigned symbols found -- pCode is dead and can be removed */
10780 pic16_pCode2str (buf, 256, pc);
10781 fprintf (stderr, "%s: pCode %p (%s) is dead.\n", __FUNCTION__, pc, buf);
10787 /* Adds implied operands to the list.
10788 * sym - operand being accessed in the pCode
10789 * list - list to append the operand
10790 * isRead - set to 1 iff sym is read in pCode
10791 * listRead - set to 1 iff all operands being read are to be listed
10793 * Returns 0 for "normal" operands, 1 for special operands.
10795 static int fixupSpecialOperands (symbol_t sym, int in_mask, int mask, pCode *pc, valnum_t val, defmap_t **list, int isRead, int isWrite) {
10796 /* check whether accessing REG accesses other REGs as well */
10800 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10801 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10802 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10806 /* reads FSR0x and WREG */
10807 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10808 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10809 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 0, pc, 0, *list);
10810 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 0, pc, 0, *list);
10816 /* reads/modifies FSR0x */
10817 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10818 *list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10819 *list = newDefmap (SPO_FSR0H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10824 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10825 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10826 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10830 /* reads FSR1x and WREG */
10831 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10832 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10833 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 0, pc, 0, *list);
10834 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 0, pc, 0, *list);
10840 /* reads/modifies FSR1x */
10841 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10842 *list = newDefmap (SPO_FSR1L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10843 *list = newDefmap (SPO_FSR1H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10848 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10849 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10850 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10854 /* reads FSR2x and WREG */
10855 *list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, *list);
10856 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10857 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 0, pc, 0, *list);
10858 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 0, pc, 0, *list);
10864 /* reads/modifies FSR2x */
10865 *list = newDefmap (sym, 0xff, 0xff, 0, 0, pc, 0, *list);
10866 *list = newDefmap (SPO_FSR2L, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10867 *list = newDefmap (SPO_FSR2H, 0xff, 0xff, 1, 1, pc, newValnum (), *list);
10871 /* modifies PCLATH and PCLATU */
10872 *list = newDefmap (SPO_PCL, 0xff, 0xff, isRead, isWrite, pc, newValnum (), *list);
10874 /* reading PCL updates PCLATx */
10875 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10876 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 0, 1, pc, newValnum (), *list);
10879 /* writing PCL implicitly reads PCLATx (computed GOTO) */
10880 *list = newDefmap (SPO_PCLATH, 0xff, 0xff, 1, 0, pc, 0, *list);
10881 *list = newDefmap (SPO_PCLATU, 0xff, 0xff, 1, 0, pc, 0, *list);
10886 *list = newDefmap (sym, in_mask, mask, isRead, isWrite, pc, val, *list);
10887 /* nothing special */
10892 /* has been a special operand */
10896 static symbol_t pic16_fsrsym_idx[][2] = {
10897 {SPO_FSR0L, SPO_FSR0H},
10898 {SPO_FSR1L, SPO_FSR1H},
10899 {SPO_FSR2L, SPO_FSR2H}
10902 /* Merge multiple defmap entries for the same symbol for list's pCode. */
10903 static void mergeDefmapSymbols (defmap_t *list) {
10904 defmap_t *ref, *curr, *temp;
10906 /* now make sure that each symbol occurs at most once per pc */
10908 while (ref && (ref->pc == list->pc)) {
10910 while (curr && (curr->pc == list->pc)) {
10911 if (curr->sym == ref->sym) {
10912 //fprintf (stderr, "Merging defmap entries for symbol %s\n", strFromSym (ref->sym));
10913 /* found a symbol occuring twice... merge the two */
10914 if (curr->acc.access.isRead) {
10915 //if (ref->acc.access.isRead) fprintf (stderr, "symbol %s was marked twice as read at pc %p\n", strFromSym (ref->sym), ref->pc);
10916 ref->acc.access.isRead = 1;
10917 ref->acc.access.in_mask |= curr->acc.access.in_mask;
10919 if (curr->acc.access.isWrite) {
10920 //if (ref->acc.access.isWrite) fprintf (stderr, "symbol %s was marked twice as written at pc %p\n", strFromSym (ref->sym), ref->pc);
10921 ref->acc.access.isWrite = 1;
10922 ref->acc.access.mask |= curr->acc.access.mask;
10926 deleteDefmap (temp);
10927 continue; // do not skip curr!
10935 /** Prepend list with the reads and definitions performed by pc. */
10936 static defmap_t *createDefmap (pCode *pc, defmap_t *list) {
10937 pCodeInstruction *pci;
10938 int cond, inCond, outCond;
10939 int mask = 0xff, smask;
10940 int isSpecial, isSpecial2;
10941 symbol_t sym, sym2;
10945 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
10946 /* TODO: mark this defmap node as an ASMDIR -- any values might be read/modified */
10947 fprintf (stderr, "ASMDIRs not supported by data flow analysis!\n");
10948 list = newDefmap (0, 0xff, 0xff, 0, 0, pc, 0, list);
10951 assert (isPCI(pc));
10954 /* handle bit instructions */
10955 if (pci->isBitInst) {
10956 assert (pci->pcop->type == PO_GPR_BIT);
10957 mask = 1U << (PCORB(PCI(pc)->pcop)->bit);
10960 /* handle (additional) implicit arguments */
10966 lit = PCOL(pci->pcop)->lit;
10967 assert (lit >= 0 && lit < 3);
10968 //fprintf (stderr, "LFSR: %s // %s\n", pci->pcop->name, pic16_get_op(((pCodeOpLit2 *)(pci->pcop))->arg2, NULL, 0));
10969 val = valnumFromStr (pic16_get_op(((pCodeOpLit2 *)(pci->pcop))->arg2, NULL, 0));
10970 //fprintf (stderr, "LFSR lit=%u, symval=%4x\n", lit, val);
10971 list = newDefmap (pic16_fsrsym_idx[lit][0], 0x00, 0xff, 0, 1, pc, val, list);
10972 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...
10976 case POC_MOVLB: // BSR
10977 case POC_BANKSEL: // BSR
10978 list = newDefmap (SPO_BSR, 0x00, 0xff, 0, 1, pc, valnumFromStr (pic16_get_op (((pCodeOpLit2 *)(pci->pcop))->arg2, NULL, 0)), list);
10981 case POC_MULWF: // PRODx
10982 case POC_MULLW: // PRODx
10983 list = newDefmap (SPO_PRODH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10984 list = newDefmap (SPO_PRODL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10987 case POC_POP: // TOS, STKPTR
10988 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10989 list = newDefmap (SPO_TOSL, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10990 list = newDefmap (SPO_TOSH, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10991 list = newDefmap (SPO_TOSU, 0x00, 0xff, 0, 1, pc, newValnum (), list);
10994 case POC_PUSH: // STKPTR
10995 list = newDefmap (SPO_STKPTR, 0xff, 0xff, 1, 1, pc, newValnum (), list);
10996 list = newDefmap (SPO_TOSL, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10997 list = newDefmap (SPO_TOSH, 0xff, 0xff, 0, 1, pc, newValnum (), list);
10998 list = newDefmap (SPO_TOSU, 0xff, 0xff, 0, 1, pc, newValnum (), list);
11001 case POC_CALL: // return values (and arguments?): WREG, PRODx, FSR0L
11002 case POC_RCALL: // return values (and arguments?): WREG, PRODx, FSR0L
11003 list = newDefmap (SPO_WREG, 0xff, 0xff, 1, 1, pc, newValnum (), list);
11004 list = newDefmap (SPO_PRODL, 0xff, 0xff, 1, 1, pc, newValnum (), list);
11005 list = newDefmap (SPO_PRODH, 0xff, 0xff, 1, 1, pc, newValnum (), list);
11006 list = newDefmap (SPO_FSR0L, 0xff, 0xff, 1, 1, pc, newValnum (), list);
11008 /* needs correctly set-up stack pointer */
11009 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
11010 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
11013 case POC_RETLW: // return values: WREG, PRODx, FSR0L
11014 /* pseudo read on (possible) return values */
11015 // WREG is handled below via outCond
11016 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
11017 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
11018 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
11020 /* caller's stack pointers must be restored */
11021 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
11022 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
11023 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
11024 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
11027 case POC_RETURN: // return values; WREG, PRODx, FSR0L
11028 case POC_RETFIE: // return value: WREG, PRODx, FSR0L
11029 /* pseudo read on (possible) return values */
11030 list = newDefmap (SPO_WREG, 0xff, 0x00, 1, 0, pc, 0, list);
11031 list = newDefmap (SPO_PRODL, 0xff, 0x00, 1, 0, pc, 0, list);
11032 list = newDefmap (SPO_PRODH, 0xff, 0x00, 1, 0, pc, 0, list);
11033 list = newDefmap (SPO_FSR0L, 0xff, 0x00, 1, 0, pc, 0, list);
11035 /* caller's stack pointers must be restored */
11036 list = newDefmap (SPO_FSR1L, 0xff, 0x00, 1, 0, pc, 0, list);
11037 list = newDefmap (SPO_FSR1H, 0xff, 0x00, 1, 0, pc, 0, list);
11038 list = newDefmap (SPO_FSR2L, 0xff, 0x00, 1, 0, pc, 0, list);
11039 list = newDefmap (SPO_FSR2H, 0xff, 0x00, 1, 0, pc, 0, list);
11043 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
11044 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
11045 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
11046 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
11049 case POC_TBLRD_POSTINC:
11050 case POC_TBLRD_POSTDEC:
11051 case POC_TBLRD_PREINC:
11052 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11053 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11054 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11055 list = newDefmap (SPO_TABLAT, 0x00, 0xff, 0, 1, pc, newValnum(), list);
11059 list = newDefmap (SPO_TBLPTRL, 0xff, 0x00, 1, 0, pc, 0, list);
11060 list = newDefmap (SPO_TBLPTRH, 0xff, 0x00, 1, 0, pc, 0, list);
11061 list = newDefmap (SPO_TBLPTRU, 0xff, 0x00, 1, 0, pc, 0, list);
11062 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
11065 case POC_TBLWT_POSTINC:
11066 case POC_TBLWT_POSTDEC:
11067 case POC_TBLWT_PREINC:
11068 list = newDefmap (SPO_TBLPTRL, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11069 list = newDefmap (SPO_TBLPTRH, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11070 list = newDefmap (SPO_TBLPTRU, 0xff, 0xff, 1, 1, pc, newValnum(), list);
11071 list = newDefmap (SPO_TABLAT, 0xff, 0x00, 1, 0, pc, 0, list);
11075 /* many instruction implicitly read BSR... -- THIS IS IGNORED! */
11079 /* handle explicit arguments */
11080 inCond = pci->inCond;
11081 outCond = pci->outCond;
11082 cond = inCond | outCond;
11083 if (cond & PCC_W) {
11084 list = newDefmap (symFromStr ("WREG"), mask, mask, inCond & PCC_W, outCond & PCC_W, pc, newValnum (), list);
11087 /* keep STATUS read BEFORE STATUS write in the list (still neccessary?) */
11088 if (inCond & PCC_STATUS) {
11090 if (inCond & PCC_C) smask |= 1U << PIC_C_BIT;
11091 if (inCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11092 if (inCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11093 if (inCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11094 if (inCond & PCC_N) smask |= 1U << PIC_N_BIT;
11096 list = newDefmap (symFromStr ("STATUS"), smask, 0x00, 1, 0, pc, 0, list);
11097 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11100 if (outCond & PCC_STATUS) {
11102 if (outCond & PCC_C) smask |= 1U << PIC_C_BIT;
11103 if (outCond & PCC_DC) smask |= 1U << PIC_DC_BIT;
11104 if (outCond & PCC_Z) smask |= 1U << PIC_Z_BIT;
11105 if (outCond & PCC_OV) smask |= 1U << PIC_OV_BIT;
11106 if (outCond & PCC_N) smask |= 1U << PIC_N_BIT;
11108 list = newDefmap (symFromStr ("STATUS"), 0x00, smask, 0, 1, pc, newValnum (), list);
11109 //fprintf (stderr, "pc %p: def STATUS & %02x\n", pc, smask);
11112 isSpecial = isSpecial2 = 0;
11114 if (cond & PCC_REGISTER) {
11115 name = pic16_get_op (pci->pcop, NULL, 0);
11116 sym = symFromStr (name);
11117 isSpecial = fixupSpecialOperands (sym, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER, outCond & PCC_REGISTER);
11118 //fprintf (stderr, "pc %p: def REG %s(%x) & %02x\n", pc, name, sym, mask);
11121 if (cond & PCC_REGISTER2) {
11122 name = pic16_get_op2 (pci->pcop, NULL, 0);
11123 sym2 = symFromStr (name);
11124 isSpecial2 = fixupSpecialOperands (sym2, mask, mask, pc, newValnum(), &list, inCond & PCC_REGISTER2, outCond & PCC_REGISTER2);
11125 //fprintf (stderr, "pc %p: def REG2 %s(%x) & %02x\n", pc, name, sym2, mask);
11129 /* make sure there is at least one entry for each pc (needed by list traversal routines) */
11130 list = newDefmap (0, 0x00, 0x00, 0, 0, pc, 0, list);
11132 mergeDefmapSymbols (list);
11138 static void printDefmap (defmap_t *map) {
11142 fprintf (stderr, "defmap @ %p:\n", curr);
11144 fprintf (stderr, "%s%s: %4x|%4x / %02x|%02x, sym %s(%x) @ pc %p\n",
11145 curr->acc.access.isRead ? "R" : " ",
11146 curr->acc.access.isWrite ? "W": " ",
11147 curr->in_val, curr->val,
11148 curr->acc.access.in_mask, curr->acc.access.mask,
11149 strFromSym(curr->sym), curr->sym,
11153 fprintf (stderr, "<EOL>\n");
11157 /* Add "additional" definitions to uniq.
11158 * 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.
11159 * This can also be used to create a uniq (out)list from a flow's defmap by passing *uniq==NULL.
11161 * If symbols defined in additional are not present in uniq, a definition is created.
11162 * Otherwise the present definition is altered to reflect the newer assignments.
11164 * flow: <uniq> --> assign1 --> assign2 --> assign3 --> ... --> <uniq'>
11165 * before `------- noted in additional --------' after
11167 * I assume that each symbol occurs AT MOST ONCE in uniq.
11170 static int defmapUpdateUniqueSym (defmap_t **uniq, defmap_t *additional) {
11175 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *uniq, additional);
11176 /* find tail of additional list (holds the first assignment) */
11178 while (curr && curr->next) curr = curr->next;
11182 /* find next assignment in additionals */
11183 while (curr && !curr->acc.access.isWrite) curr = curr->prev;
11187 /* find item in uniq */
11189 //printDefmap (*uniq);
11190 while (old && (old->sym != curr->sym)) old = old->next;
11193 /* definition found -- replace */
11194 if (old->val != curr->val) {
11195 old->val = curr->val;
11199 /* new definition */
11200 *uniq = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, curr->val, *uniq);
11207 /* return 0 iff uniq remained unchanged */
11211 /* Creates the in_value list of a flow by (iteratively) merging the out_value
11212 * lists of its predecessor flows.
11213 * Initially *combined should be NULL, alt_in will be copied to combined.
11214 * If *combined != NULL, combined will be altered:
11215 * - for symbols defined in *combined but not in alt_in,
11216 * *combined is altered to 0 (value unknown, either *combined or INIT).
11217 * - for symbols defined in alt_in but not in *combined,
11218 * a 0 definition is created (value unknown, either INIT or alt).
11219 * - for symbols defined in both, *combined is:
11220 * > left unchanged if *combined->val == alt_in->val or
11221 * > modified to 0 otherwise (value unknown, either alt or *combined).
11223 * I assume that each symbol occurs AT MOST ONCE in each list!
11225 static int defmapCombineFlows (defmap_t **combined, defmap_t *alt_in, pBlock *pb) {
11231 //fprintf (stderr, "%s: merging %p & %p\n", __FUNCTION__, *combined, alt_in);
11233 if (!(*combined)) {
11234 return defmapUpdateUniqueSym (combined, alt_in);
11237 /* merge the two */
11240 /* find symbols definition in *combined */
11242 while (old && (old->sym != curr->sym)) old = old->next;
11245 /* definition found */
11246 if (old->val && (old->val != curr->val)) {
11247 old->val = 0; /* value unknown */
11251 /* no definition found -- can be either INIT or alt_in's value */
11252 val = pic16_pBlockAddInval (pb, curr->sym)->val;
11253 *combined = newDefmap (curr->sym, 0x00, 0xff, 0, 1, NULL, (val == curr->val) ? val : 0, *combined);
11254 if (val != curr->val) change++;
11260 /* update symbols from *combined that are NOT defined in alt_in -- can be either *combined's value or INIT */
11263 if (old->val != 0) {
11264 /* find definition in alt_in */
11266 while (curr && curr->sym != old->sym) curr = curr->next;
11268 /* symbol defined in *combined only -- can be either INIT or *combined */
11269 val = pic16_pBlockAddInval (pb, old->sym)->val;
11270 if (old->val != val) {
11283 static int defmapCompareUnique (defmap_t *map1, defmap_t *map2) {
11284 defmap_t *curr1, *curr2;
11287 /* identical maps are equal */
11288 if (map1 == map2) return 0;
11290 if (!map1) return -1;
11291 if (!map2) return 1;
11293 //fprintf (stderr, "%s: comparing %p & %p\n", __FUNCTION__, map1, map2);
11298 while (curr1 && curr2) {
11299 curr1 = curr1->next;
11300 curr2 = curr2->next;
11303 /* one of them longer? */
11304 if (curr1) return 1;
11305 if (curr2) return -1;
11307 /* both lists are of equal length -- compare (in O(n^2)) */
11312 while (curr2 && curr2->sym != sym) curr2 = curr2->next;
11313 if (!curr2) return 1; // symbol not found in curr2
11314 if (curr2->val != curr1->val) return 1; // values differ
11316 /* compare next symbol */
11317 curr1 = curr1->next;
11320 /* no difference found */
11325 /* Prepare a list of all reaching definitions per flow.
11326 * This is done using a forward dataflow analysis.
11328 static void createReachingDefinitions (pBlock *pb) {
11329 defmap_t *out_vals, *in_vals;
11332 pCodeFlowLink *link;
11336 /* initialize out_vals to unique'fied defmaps per pCodeFlow */
11337 for (pc = pic16_findNextInstruction (pb->pcHead); pc; pc = pic16_findNextInstruction (pc->next)) {
11339 deleteDefmapChain (&PCFL(pc)->in_vals);
11340 deleteDefmapChain (&PCFL(pc)->out_vals);
11341 defmapUpdateUniqueSym (&PCFL(pc)->out_vals, PCFL(pc)->defmap);
11345 pc = pic16_findNextInstruction (pb->pcHead);
11346 todo = NULL; blacklist = NULL;
11347 addSetHead (&todo, PCI(pc)->pcflow);
11349 //fprintf (stderr, "%s: function %s()\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11350 while (elementsInSet (todo)) {
11351 //fprintf (stderr, "%u items in todo-set\n", elementsInSet (todo));
11352 pcfl = PCFL(indexSet (todo, 0));
11353 deleteSetItem (&todo, pcfl);
11354 //fprintf (stderr, "%s: checking %p\n", __FUNCTION__, pcfl);
11358 if (isinSet (blacklist, pcfl)) {
11359 fprintf (stderr, "ignoring blacklisted flow\n");
11363 /* create in_vals from predecessors out_vals */
11364 link = setFirstItem (pcfl->from);
11366 defmapCombineFlows (&in_vals, link->pcflow->out_vals, pb);
11367 link = setNextItem (pcfl->from);
11370 //printDefmap (in_vals);
11371 //printDefmap (pcfl->in_vals);
11373 if (!pcfl->in_vals || !pcfl->out_vals || defmapCompareUnique (in_vals, pcfl->in_vals)) {
11374 //fprintf (stderr, "in_vals changed\n");
11375 /* in_vals changed -- update out_vals */
11376 deleteDefmapChain (&pcfl->in_vals);
11377 pcfl->in_vals = in_vals;
11379 /* create out_val from in_val and defmap */
11381 defmapUpdateUniqueSym (&out_vals, in_vals);
11382 defmapUpdateUniqueSym (&out_vals, pcfl->defmap);
11384 /* is out_vals different from pcfl->out_vals */
11385 if (!pcfl->out_vals || defmapCompareUnique (out_vals, pcfl->out_vals)) {
11386 //fprintf (stderr, "out_vals changed\n");
11387 deleteDefmapChain (&pcfl->out_vals);
11388 pcfl->out_vals = out_vals;
11390 if (pcfl->out_vals == NULL && pcfl->in_vals == NULL) {
11391 addSet (&blacklist, pcfl);
11394 /* reschedule all successors */
11395 link = setFirstItem (pcfl->to);
11397 //fprintf (stderr, " %p --> %p\n", pcfl, link->pcflow);
11398 addSetIfnotP (&todo, link->pcflow);
11399 link = setNextItem (pcfl->to);
11402 deleteDefmapChain (&out_vals);
11405 deleteDefmapChain (&in_vals);
11411 static void showAllDefs (symbol_t sym, pCode *pc) {
11415 assert (isPCI(pc));
11416 count = defmapFindAll (sym, pc, &map);
11418 fprintf (stderr, "sym %s(%x) @ %p defined as (val@pc): ", strFromSym(sym), sym, pc);
11421 fprintf (stderr, "(%x @ %p) ", map->val, map->pc);
11424 pic16_pCode2str (buf, 256, map->pc);
11425 fprintf (stderr, "\n (%x @ %p(%s)) ", map->val, map->pc, buf);
11429 deleteDefmapChain (&map);
11433 /* safepCodeUnlink and remove pc from defmap. */
11434 static int pic16_safepCodeRemove (pCode *pc, char *comment) {
11435 defmap_t *map, *next, **head;
11439 map = isPCI(pc) ? PCI(pc)->pcflow->defmap : NULL;
11440 head = isPCI(pc) ? &PCI(pc)->pcflow->defmap : NULL;
11441 res = pic16_safepCodeUnlink (pc, comment);
11444 /* remove pc from defmap */
11447 if (map->pc == pc) {
11448 if (!map->prev && head) *head = map->next;
11449 deleteDefmap (map);
11458 void pic16_fixDefmap (pCode *pc, pCode *newpc) {
11460 /* This breaks the defmap chain's references to pCodes... fix it! */
11461 map = PCI(pc)->pcflow->defmap;
11463 while (map && map->pc != pc) map = map->next;
11465 while (map && map->pc == pc) {
11471 /* Replace a defmap entry for sym with newsym for read accesses (isRead == 1) or
11472 * write accesses (isRead == 0). */
11473 void defmapReplaceSymRef (pCode *pc, symbol_t sym, symbol_t newsym, int isRead) {
11474 defmap_t *map, *map_start;
11476 if (!isPCI(pc)) return;
11477 if (sym == newsym) return;
11479 map = PCI(pc)->pcflow->defmap;
11481 while (map && map->pc != pc) map = map->next;
11483 while (map && map->pc == pc) {
11484 if (map->sym == sym) {
11485 assert ((isRead && map->acc.access.isRead) || ((!isRead) && (map->acc.access.isWrite)));
11486 if (!(map->acc.access.isRead && map->acc.access.isWrite)) {
11487 /* only one kind of access handled... this is easy */
11490 /* must copy defmap entry before replacing symbol... */
11491 copy = copyDefmap (map);
11493 map->acc.access.isRead = 0;
11494 copy->acc.access.isWrite = 0;
11496 map->acc.access.isWrite = 0;
11497 copy->acc.access.isRead = 0;
11499 copy->sym = newsym;
11500 /* insert copy into defmap chain */
11501 defmapInsertAfter (map, copy);
11507 /* as this might introduce multiple defmap entries for newsym... */
11508 mergeDefmapSymbols (map_start);
11511 /* Assign "better" valnums to results. */
11512 static void assignValnums (pCode *pc) {
11513 pCodeInstruction *pci;
11515 symbol_t sym1, sym2;
11516 int cond, isSpecial1, isSpecial2, count, mask, lit;
11517 defmap_t *list, *val, *oldval, *dummy;
11518 regs *reg1 = NULL, *reg2 = NULL;
11521 /* only works for pCodeInstructions... */
11522 if (!isPCI(pc)) return;
11525 cond = pci->inCond | pci->outCond;
11526 list = pci->pcflow->defmap;
11527 sym1 = sym2 = isSpecial1 = isSpecial2 = 0;
11529 if (cond & PCC_REGISTER) {
11530 sym1 = symFromStr (pic16_get_op (pci->pcop, NULL, 0));
11531 reg1 = pic16_getRegFromInstruction (pc);
11532 isSpecial1 = pic16_symIsSpecial (sym1);
11534 if (cond & PCC_REGISTER2) {
11535 sym2 = symFromStr (pic16_get_op2 (pci->pcop, NULL, 0));
11536 reg2 = pic16_getRegFromInstruction (pc);
11537 isSpecial2 = pic16_symIsSpecial (sym2);
11540 /* determine input values */
11542 while (val && val->pc != pc) val = val->next;
11543 //list = val; /* might save some time later... */
11544 while (val && val->pc == pc) {
11546 if (val->sym != 0 && (1 || val->acc.access.isRead)) {
11547 /* get valnum for sym */
11548 count = defmapFindAll (val->sym, pc, &oldval);
11549 //fprintf (stderr, "%d defs for sym %s\n", count, strFromSym (val->sym));
11551 if ((val->acc.access.in_mask & oldval->acc.access.mask) == val->acc.access.in_mask) {
11552 val->in_val = oldval->val;
11556 } else if (count == 0) {
11557 /* no definition found */
11560 /* multiple definition(s) found -- value not known (unless always the same valnum) */
11562 dummy = oldval->next;
11563 mask = oldval->acc.access.mask;
11564 val->in_val = oldval->val;
11565 while (dummy && (dummy->val == val->in_val)) {
11566 mask &= dummy->acc.access.mask;
11567 dummy = dummy->next;
11570 /* found other values or to restictive mask */
11571 if (dummy || ((mask & val->acc.access.in_mask) != val->acc.access.in_mask)) {
11575 if (count > 0) deleteDefmapChain (&oldval);
11580 /* handle valnum assignment */
11582 case POC_CLRF: /* modifies STATUS (Z) */
11583 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11584 oldval = defmapCurr (list, sym1, pc);
11585 if (oldval && (litFromValnum (oldval->in_val) == 0)) {
11586 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11587 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant CLRF removed");
11589 defmapUpdate (list, sym1, pc, valnumFromLit(0));
11593 case POC_SETF: /* SETF does not touch STATUS */
11594 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11595 oldval = defmapCurr (list, sym1, pc);
11596 if (oldval && (litFromValnum (oldval->in_val) == 0x00FF)) {
11597 //fprintf (stderr, "%s: REG (%s) already set up correctly (%x)\n", pci->mnemonic, strFromSym(sym1), oldval->in_val);
11598 pic16_safepCodeRemove (pc, "=DF= redundant SETF removed");
11600 defmapUpdate (list, sym1, pc, valnumFromLit (0x00FF));
11604 case POC_MOVLW: /* does not touch STATUS */
11605 oldval = defmapCurr (list, SPO_WREG, pc);
11606 if (pci->pcop->type == PO_LITERAL) {
11607 //fprintf (stderr, "MOVLW: literal %u\n", PCOL(pci->pcop)->lit);
11608 litnum = valnumFromLit ((unsigned char)PCOL(pci->pcop)->lit);
11610 //fprintf (stderr, "MOVLW: %s\n", pic16_get_op (pci->pcop, NULL, 0));
11611 litnum = valnumFromStr (pic16_get_op (pci->pcop, NULL, 0));
11613 if (oldval && oldval->in_val == litnum) {
11614 //fprintf (stderr, "%s: W already set up correctly (%x)\n", PCI(pc)->mnemonic, oldval->in_val);
11615 pic16_safepCodeRemove (pc, "=DF= redundant MOVLW removed");
11617 defmapUpdate (list, SPO_WREG, pc, litnum);
11620 case POC_ANDLW: /* modifies STATUS (Z,N) */
11621 case POC_IORLW: /* modifies STATUS (Z,N) */
11622 case POC_XORLW: /* modifies STATUS (Z,N) */
11623 /* can be optimized iff WREG contains a known literal (0x100 - 0x1FF) */
11624 if (pci->pcop->type == PO_LITERAL) {
11626 lit = (unsigned char) PCOL(pci->pcop)->lit;
11627 val = defmapCurr (list, SPO_WREG, pc);
11628 if (val) vallit = litFromValnum (val->in_val);
11629 if (vallit != -1) {
11630 /* xxxLW <literal>, WREG contains a known literal */
11631 //fprintf (stderr, "%s 0x%02x, WREG: 0x%x\n", pci->mnemonic, lit, vallit);
11632 if (pci->op == POC_ANDLW) {
11634 } else if (pci->op == POC_IORLW) {
11636 } else if (pci->op == POC_XORLW) {
11639 assert (0 && "invalid operation");
11641 if (vallit == lit) {
11642 //fprintf (stderr, "%s: W already set up correctly (%x = val %x)\n", pci->mnemonic, vallit, val->in_val);
11643 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant ANDLW/IORLW/XORLW removed");
11645 defmapUpdate (list, SPO_WREG, pc, valnumFromLit (lit));
11652 /* check if old value matches new value */
11655 assert (pci->pcop->type == PO_LITERAL);
11657 lit = PCOL(pci->pcop)->lit;
11659 val = defmapCurr (list, pic16_fsrsym_idx[lit][0], pc);
11661 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11662 //fprintf (stderr, "FSR%dL already set up correctly at %p (%x)\n", lit, pc, val->val);
11664 /* cannot remove this LFSR */
11668 val = defmapCurr (list, pic16_fsrsym_idx[lit][1], pc);
11669 if (val && (val->in_val != 0) && (val->in_val == val->val)) {
11670 //fprintf (stderr, "FSR%dH already set up correctly at %p (%x)\n", lit, pc, val->val);
11676 pic16_safepCodeRemove (pc, "=DF= redundant LFSR removed");
11681 case POC_MOVWF: /* does not touch flags */
11682 /* find value of WREG */
11683 val = defmapCurr (list, SPO_WREG, pc);
11684 oldval = defmapCurr (list, sym1, pc);
11685 if (val) lit = litFromValnum (val->in_val);
11687 //fprintf (stderr, "MOVWF: lit: %i (%x, %x)\n", lit, lit, val->in_val);
11689 if ((lit == 0 || lit == 0x0ff) && !pic16_isAlive (SPO_STATUS, pc)) {
11690 /* might replace with CLRF/SETF (will possibly make previous MOVLW 0x00/0xff unneccessary --> dead code elimination) */
11691 //fprintf (stderr, "replacing MOVWF with CLRF/SETF\n");
11693 newpc = pic16_newpCode (POC_CLRF, pic16_pCodeOpCopy (pci->pcop));
11695 assert (lit == 0x0ff);
11696 newpc = pic16_newpCode (POC_SETF, pic16_pCodeOpCopy (pci->pcop));
11698 if (pic16_debug_verbose || pic16_pcode_verbose) pic16_InsertCommentAfter (pc->prev, "=DF= MOVWF: replaced by CLRF/SETF");
11699 pic16_pCodeReplace (pc, newpc);
11700 defmapReplaceSymRef (pc, SPO_WREG, 0, 1);
11701 pic16_fixDefmap (pc, newpc);
11704 /* This breaks the defmap chain's references to pCodes... fix it! */
11705 if (!val->prev) PCI(pc)->pcflow->defmap = val->next;
11706 if (!val->acc.access.isWrite) {
11707 deleteDefmap (val); // delete reference to WREG as in value
11710 val->acc.access.isRead = 0; // delete reference to WREG as in value
11712 oldval = PCI(pc)->pcflow->defmap;
11714 if (oldval->pc == pc) oldval->pc = newpc;
11715 oldval = oldval->next;
11717 } else if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11718 //fprintf (stderr, "MOVWF: F (%s) already set up correctly (%x) at %p\n", strFromSym (sym1), oldval->in_val, pc);
11719 pic16_safepCodeRemove (pc, "=DF= redundant MOVWF removed");
11721 if (val) defmapUpdate (list, sym1, pc, val->in_val);
11724 case POC_MOVFW: /* modifies STATUS (Z,N) */
11725 /* find value of REG */
11726 if (!isSpecial1 && pic16_regIsLocal (reg1)) {
11727 val = defmapCurr (list, sym1, pc);
11728 oldval = defmapCurr (list, SPO_WREG, pc);
11729 if (val && oldval && (val->in_val != 0) && (val->in_val == oldval->in_val)) {
11730 //fprintf (stderr, "MOVFW: W already set up correctly (%x) at %p\n", oldval->in_val, pc);
11731 if (!pic16_isAlive (SPO_STATUS, pc)) pic16_safepCodeRemove (pc, "=DF= redundant MOVFW removed");
11733 if (val) defmapUpdate (list, SPO_WREG, pc, val->in_val);
11737 case POC_MOVFF: /* does not touch STATUS */
11738 /* find value of REG */
11739 val = defmapCurr (list, sym1, pc);
11740 oldval = defmapCurr (list, sym2, pc);
11741 if (val) lit = litFromValnum (val->in_val);
11744 if (!isSpecial1 && pic16_regIsLocal (reg1) && val && oldval && !pic16_isAlive (SPO_STATUS, pc)) {
11745 //pc->print (stderr, pc); fprintf (stderr, "lit: %d (%x, %x)\n", lit, lit, val->in_val);
11747 newpc = pic16_newpCode (POC_CLRF, PCOR2(pci->pcop)->pcop2);
11748 } else if (lit == 0x00ff) {
11749 newpc = pic16_newpCode (POC_SETF, PCOR2(pci->pcop)->pcop2);
11754 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: replaced by CRLF/SETF");
11755 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11756 pic16_pCodeReplace (pc, newpc);
11757 defmapReplaceSymRef (pc, sym1, 0, 1);
11758 pic16_fixDefmap (pc, newpc);
11760 break; // do not process instruction as MOVFF...
11762 } else if (!isSpecial1 && !isSpecial2
11763 && pic16_regIsLocal (reg1) && pic16_regIsLocal (reg2)
11764 && val && oldval && (val->in_val != 0)) {
11765 if (val->in_val == oldval->in_val) {
11766 //fprintf (stderr, "MOVFF: F2 (%s) already set up correctly (%x) at %p\n", strFromSym (sym2), oldval->in_val, pc);
11767 pic16_safepCodeRemove (pc, "=DF= redundant MOVFF removed");
11769 if (!pic16_isAlive (sym1, pc)) {
11770 defmap_t *copy = NULL;
11771 /* If there is another symbol S storing sym1's value we should assign from S thus shortening the liferange of sym1.
11772 * This should help eliminate
11774 * <do something not changing A or using B>
11776 * <B is not alive anymore>
11778 * <do something not changing A or using B>
11782 /* scan defmap for symbols storing sym1's value */
11783 while (oldval && (oldval->pc == pc || oldval->in_val != val->in_val)) oldval = oldval->next;
11784 if (oldval && (oldval->sym != sym1) && defmapFindAll (oldval->sym, pc, ©) == 1) {
11785 /* unique reaching definition for sym found */
11786 if (copy->val && copy->val == val->in_val) {
11787 //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);
11788 if (copy->sym == SPO_WREG) {
11789 newpc = pic16_newpCode (POC_MOVWF, pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2));
11791 pCodeOp *pcop = NULL;
11792 /* the code below fails if we try to replace
11793 * MOVFF PRODL, r0x03
11794 * MOVFF r0x03, PCLATU
11796 * MOVFF PRODL, PCLATU
11797 * as copy(PRODL) contains has pc==NULL, by name fails...
11799 if (!copy->pc || !PCI(copy->pc)->pcop) break;
11801 if (copy->pc && PCI(copy->pc)->pcop)
11802 pcop = PCI(copy->pc)->pcop;
11804 /* This code is broken--see above. */
11807 const char *symname = strFromSym(copy->sym);
11810 pic16_InsertCommentAfter (pc->prev, "BUG-ME");
11811 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: newpCodeOpregFromStr(%s)", (char *)symname);
11812 //pcop = pic16_newpCodeOpRegFromStr((char *)symname);
11816 newpc = pic16_newpCode(POC_MOVFF, pic16_popGet2p(
11818 pic16_pCodeOpCopy (PCOR2(pci->pcop)->pcop2)));
11820 pic16_InsertCommentAfter (pc->prev, "=DF= MOVFF: SRC op %s replaced by %s", strFromSym(sym1), strFromSym(copy->sym));
11821 pic16_df_saved_bytes += PCI(pc)->isize - PCI(newpc)->isize;
11822 pic16_pCodeReplace (pc, newpc);
11823 assert (val->sym == sym1 && val->acc.access.isRead && !val->acc.access.isWrite);
11824 defmapReplaceSymRef (pc, sym1, copy->sym, 1);
11825 pic16_fixDefmap (pc, newpc);
11829 deleteDefmapChain (©);
11832 if (val) defmapUpdate (list, sym2, pc, val->in_val);
11837 /* cannot optimize */
11842 static void pic16_destructDF (pBlock *pb) {
11845 /* remove old defmaps */
11846 pc = pic16_findNextInstruction (pb->pcHead);
11848 next = pic16_findNextInstruction (pc->next);
11850 assert (isPCI(pc) || isPCAD(pc));
11851 assert (PCI(pc)->pcflow);
11852 deleteDefmapChain (&PCI(pc)->pcflow->defmap);
11853 deleteDefmapChain (&PCI(pc)->pcflow->in_vals);
11854 deleteDefmapChain (&PCI(pc)->pcflow->out_vals);
11859 if (defmap_free || defmap_free_count) {
11860 //fprintf (stderr, "released defmaps: %u -- freeing up memory\n", defmap_free_count);
11861 freeDefmap (&defmap_free);
11862 defmap_free_count = 0;
11866 /* Checks whether a pBlock contains ASMDIRs. */
11867 static int pic16_pBlockHasAsmdirs (pBlock *pb) {
11870 pc = pic16_findNextInstruction (pb->pcHead);
11872 if (isPCAD(pc)) return 1;
11874 pc = pic16_findNextInstruction (pc->next);
11877 /* no PCADs found */
11882 /* Remove MOVFF r0x??, POSTDEC1 and MOVFF PREINC1, r0x?? for otherwise unused registers. */
11883 static int pic16_removeUnusedRegistersDF () {
11886 regs *reg1, *reg2, *reg3;
11887 set *seenRegs = NULL;
11889 int islocal, change = 0;
11892 if (!the_pFile || !the_pFile->pbHead) return 0;
11894 for (pb = the_pFile->pbHead; pb; pb = pb->next) {
11895 //fprintf (stderr, "%s: examining function %s\n", __FUNCTION__, pic16_pBlockGetFunctionName (pb));
11897 /* find set of using pCodes per register */
11898 for (pc = pic16_findNextInstruction (pb->pcHead); pc;
11899 pc = pic16_findNextInstruction(pc->next)) {
11901 cond = PCI(pc)->inCond | PCI(pc)->outCond;
11902 reg1 = reg2 = NULL;
11903 if (cond & PCC_REGISTER) reg1 = pic16_getRegFromInstruction (pc);
11904 if (cond & PCC_REGISTER2) reg2 = pic16_getRegFromInstruction2 (pc);
11907 if (!isinSet (seenRegs, reg1)) reg1->reglives.usedpCodes = NULL;
11908 addSetIfnotP (&seenRegs, reg1);
11909 addSetIfnotP (®1->reglives.usedpCodes, pc);
11912 if (!isinSet (seenRegs, reg2)) reg2->reglives.usedpCodes = NULL;
11913 addSetIfnotP (&seenRegs, reg2);
11914 addSetIfnotP (®2->reglives.usedpCodes, pc);
11918 for (reg1 = setFirstItem (seenRegs); reg1; reg1 = setNextItem (seenRegs)) {
11919 /* may not use pic16_regIsLocal() here -- in interrupt routines
11920 * WREG, PRODx, FSR0x must be saved */
11921 islocal = (reg1->isLocal || reg1->rIdx == pic16_framepnt_lo->rIdx || reg1->rIdx == pic16_framepnt_hi->rIdx);
11922 if (islocal && elementsInSet (reg1->reglives.usedpCodes) == 2) {
11924 for (i=0; i < 2; i++) {
11925 pc = (pCode *) indexSet(reg1->reglives.usedpCodes, i);
11926 if (!pc2) pc2 = pc;
11927 if (!isPCI(pc) || !PCI(pc)->op == POC_MOVFF) continue;
11928 reg2 = pic16_getRegFromInstruction (pc);
11929 reg3 = pic16_getRegFromInstruction2 (pc);
11931 || (reg2->rIdx != pic16_stack_preinc->rIdx
11932 && reg3->rIdx != pic16_stack_postdec->rIdx)) break;
11934 /* both pCodes are MOVFF R,POSTDEC1 / MOVFF PREINC1,R */
11935 //fprintf (stderr, "%s: removing local register %s from %s\n", __FUNCTION__, reg1->name, pic16_pBlockGetFunctionName (pb));
11936 pic16_safepCodeRemove (pc, "removed unused local reg IN");
11937 pic16_safepCodeRemove (pc2, "removed unused local reg OUT");
11941 deleteSet (®1->reglives.usedpCodes);
11944 deleteSet (&seenRegs);
11951 /* Set up pCodeFlow's defmap_ts.
11952 * Needs correctly set up to/from fields. */
11953 static void pic16_createDF (pBlock *pb) {
11957 //fprintf (stderr, "creating DF for pb %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
11959 pic16_destructDF (pb);
11961 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
11962 if (pic16_pBlockHasAsmdirs (pb)) {
11963 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
11967 /* integrity check -- we need to reach all flows to guarantee
11968 * correct data flow analysis (reaching definitions, aliveness) */
11970 if (!verifyAllFlowsReachable (pb)) {
11971 fprintf (stderr, "not all flows reachable -- aborting dataflow analysis for %s!\n", pic16_pBlockGetFunctionName (pb));
11976 /* establish new defmaps */
11977 pc = pic16_findNextInstruction (pb->pcHead);
11979 next = pic16_findNextInstruction (pc->next);
11981 assert (PCI(pc)->pcflow);
11982 PCI(pc)->pcflow->defmap = createDefmap (pc, PCI(pc)->pcflow->defmap);
11987 //fprintf (stderr, "%s: creating reaching definitions...\n", __FUNCTION__);
11988 createReachingDefinitions (pb);
11991 /* assign better valnums */
11992 //fprintf (stderr, "assigning valnums for pb %p\n", pb);
11993 pc = pic16_findNextInstruction (pb->pcHead);
11995 next = pic16_findNextInstruction (pc->next);
11997 assert (PCI(pc)->pcflow);
11998 assignValnums (pc);
12005 /* remove dead pCodes */
12006 //fprintf (stderr, "removing dead pCodes in %p (%s)\n", pb, pic16_pBlockGetFunctionName (pb));
12009 pc = pic16_findNextInstruction (pb->pcHead);
12011 next = pic16_findNextInstruction (pc->next);
12013 if (isPCI(pc) && !isPCI_BRANCH(pc) && !pic16_pCodeIsAlive (pc)) {
12014 change += pic16_safepCodeRemove (pc, "=DF= removed dead pCode");
12023 /* ======================================================================== */
12024 /* === VCG DUMPER ROUTINES ================================================ */
12025 /* ======================================================================== */
12026 #if defined (DUMP_DF_GRAPHS) && DUMP_DF_GRAPHS > 0
12027 hTab *dumpedNodes = NULL;
12029 /** Dump VCG header into of. */
12030 static void pic16_vcg_init (FILE *of) {
12031 /* graph defaults */
12032 fprintf (of, "graph:{\n");
12033 fprintf (of, "title:\"graph1\"\n");
12034 fprintf (of, "label:\"graph1\"\n");
12035 fprintf (of, "color:white\n");
12036 fprintf (of, "textcolor:black\n");
12037 fprintf (of, "bordercolor:black\n");
12038 fprintf (of, "borderwidth:1\n");
12039 fprintf (of, "textmode:center\n");
12041 fprintf (of, "layoutalgorithm:dfs\n");
12042 fprintf (of, "late_edge_labels:yes\n");
12043 fprintf (of, "display_edge_labels:yes\n");
12044 fprintf (of, "dirty_edge_labels:yes\n");
12045 fprintf (of, "finetuning:yes\n");
12046 fprintf (of, "ignoresingles:no\n");
12047 fprintf (of, "straight_phase:yes\n");
12048 fprintf (of, "priority_phase:yes\n");
12049 fprintf (of, "manhattan_edges:yes\n");
12050 fprintf (of, "smanhattan_edges:no\n");
12051 fprintf (of, "nearedges:no\n");
12052 fprintf (of, "node_alignment:center\n"); // bottom|top|center
12053 fprintf (of, "port_sharing:no\n");
12054 fprintf (of, "arrowmode:free\n"); // fixed|free
12055 fprintf (of, "crossingphase2:yes\n");
12056 fprintf (of, "crossingoptimization:yes\n");
12057 fprintf (of, "edges:yes\n");
12058 fprintf (of, "nodes:yes\n");
12059 fprintf (of, "splines:no\n");
12061 /* node defaults */
12062 fprintf (of, "node.color:lightyellow\n");
12063 fprintf (of, "node.textcolor:black\n");
12064 fprintf (of, "node.textmode:center\n");
12065 fprintf (of, "node.shape:box\n");
12066 fprintf (of, "node.bordercolor:black\n");
12067 fprintf (of, "node.borderwidth:1\n");
12069 /* edge defaults */
12070 fprintf (of, "edge.textcolor:black\n");
12071 fprintf (of, "edge.color:black\n");
12072 fprintf (of, "edge.thickness:1\n");
12073 fprintf (of, "edge.arrowcolor:black\n");
12074 fprintf (of, "edge.backarrowcolor:black\n");
12075 fprintf (of, "edge.arrowsize:15\n");
12076 fprintf (of, "edge.backarrowsize:15\n");
12077 fprintf (of, "edge.arrowstyle:line\n"); // none|solid|line
12078 fprintf (of, "edge.backarrowstyle:none\n"); // none|solid|line
12079 fprintf (of, "edge.linestyle:continuous\n"); // continuous|solid|dotted|dashed|invisible
12081 fprintf (of, "\n");
12083 /* prepare data structures */
12085 hTabDeleteAll (dumpedNodes);
12086 dumpedNodes = NULL;
12088 dumpedNodes = newHashTable (128);
12091 /** Dump VCG footer into of. */
12092 static void pic16_vcg_close (FILE *of) {
12093 fprintf (of, "}\n");
12096 #define BUF_SIZE 128
12097 #define pcTitle(pc) (SNPRINTF (buf, BUF_SIZE, "n_%p, %p/%u", PCODE(pc), isPCI(pc) ? PCI(pc)->pcflow : NULL, PCODE(pc)->seq), &buf[0])
12100 static int ptrcmp (const void *p1, const void *p2) {
12105 /** Dump a pCode node as VCG to of. */
12106 static void pic16_vcg_dumpnode (pCode *pc, FILE *of) {
12107 char buf[BUF_SIZE];
12109 if (hTabFindByKey (dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, ptrcmp)) {
12113 hTabAddItemLong (&dumpedNodes, (((char *) pc - (char *) 0)>>2) % 128, pc, pc);
12114 //fprintf (stderr, "dumping %p\n", pc);
12116 /* only dump pCodeInstructions and Flow nodes */
12117 if (!isPCI(pc) && !isPCAD(pc) && !isPCFL(pc)) return;
12120 fprintf (of, "node:{");
12121 fprintf (of, "title:\"%s\" ", pcTitle(pc));
12122 fprintf (of, "label:\"%s\n", pcTitle(pc));
12124 fprintf (of, "<PCFLOW>");
12125 } else if (isPCI(pc) || isPCAD(pc)) {
12126 pc->print (of, pc);
12128 fprintf (of, "<!PCI>");
12130 fprintf (of, "\" ");
12131 fprintf (of, "}\n");
12133 if (1 && isPCFL(pc)) {
12134 defmap_t *map, *prev;
12136 map = PCFL(pc)->defmap;
12139 if (map->sym != 0) {
12142 /* emit definition node */
12143 fprintf (of, "node:{title:\"%s_def%u\" ", pcTitle(pc), i);
12144 fprintf (of, "label:\"");
12148 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));
12151 } while (map && prev->pc == map->pc);
12154 fprintf (of, "\" ");
12156 fprintf (of, "color:green ");
12157 fprintf (of, "}\n");
12159 /* emit edge to previous definition */
12160 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12162 fprintf (of, "targetname:\"%s\" ", pcTitle(pc));
12164 fprintf (of, "targetname:\"%s_def%u\" ", pcTitle(pc), i-1);
12166 fprintf (of, "color:green ");
12167 fprintf (of, "}\n");
12170 pic16_vcg_dumpnode (map->pc, of);
12171 fprintf (of, "edge:{sourcename:\"%s_def%u\" ", pcTitle(pc), i);
12172 fprintf (of, "targetname:\"%s\" linestyle:dashed color:lightgreen}\n", pcTitle(map->pc));
12179 /* emit additional nodes (e.g. operands) */
12182 /** Dump a pCode's edges (control flow/data flow) as VCG to of. */
12183 static void pic16_vcg_dumpedges (pCode *pc, FILE *of) {
12184 char buf[BUF_SIZE];
12185 pCodeInstruction *pci;
12189 if (1 && isPCFL(pc)) {
12190 /* emit edges to flow successors */
12192 //fprintf (stderr, "PCFLOWe @ %p\n", pc);
12193 pcfl = setFirstItem (PCFL(pc)->to);
12195 pcfl = ((pCodeFlowLink *) (pcfl))->pcflow;
12196 pic16_vcg_dumpnode (pc, of);
12197 pic16_vcg_dumpnode ((pCode *) pcfl, of);
12198 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12199 fprintf (of, "targetname:\"%s\" color:lightred linestyle:dashed}\n", pcTitle(pcfl));
12200 pcfl = setNextItem (PCFL(pc)->to);
12204 if (!isPCI(pc) && !isPCAD(pc)) return;
12208 /* emit control flow edges (forward only) */
12212 pic16_vcg_dumpnode (curr->pc, of);
12213 fprintf (of, "edge:{");
12214 fprintf (of, "sourcename:\"%s\" ", pcTitle(pc));
12215 fprintf (of, "targetname:\"%s\" ", pcTitle(curr->pc));
12216 fprintf (of, "color:red ");
12217 fprintf (of, "}\n");
12222 /* dump "flow" edge (link pCode according to pBlock order) */
12225 pcnext = pic16_findNextInstruction (pc->next);
12227 pic16_vcg_dumpnode (pcnext, of);
12228 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12229 fprintf (of, "targetname:\"%s\" color:red linestyle:solid}\n", pcTitle(pcnext));
12237 pic16_vcg_dumpnode (&pci->pcflow->pc, of);
12238 fprintf (of, "edge:{sourcename:\"%s\" ", pcTitle(pc));
12239 fprintf (of, "targetname:\"%s\" color:lightblue linestyle:dashed}\n", pcTitle (pci->pcflow));
12243 /* emit data flow edges (backward only) */
12244 /* TODO: gather data flow information... */
12247 static void pic16_vcg_dump (FILE *of, pBlock *pb) {
12250 /* check pBlock: do not analyze pBlocks with ASMDIRs (for now...) */
12251 if (pic16_pBlockHasAsmdirs (pb)) {
12252 //fprintf (stderr, "%s: pBlock contains ASMDIRs -- data flow analysis not performed!\n", __FUNCTION__);
12256 for (pc=pb->pcHead; pc; pc = pc->next) {
12257 pic16_vcg_dumpnode (pc, of);
12260 for (pc=pb->pcHead; pc; pc = pc->next) {
12261 pic16_vcg_dumpedges (pc, of);
12265 static void pic16_vcg_dump_default (pBlock *pb) {
12267 char buf[BUF_SIZE];
12270 /* get function name */
12272 while (pc && !isPCF(pc)) pc = pc->next;
12274 SNPRINTF (buf, BUF_SIZE, "%s_%s.vcg", PCF(pc)->modname, PCF(pc)->fname);
12276 SNPRINTF (buf, BUF_SIZE, "pb_%p.vcg", pb);
12279 //fprintf (stderr, "now dumping %s\n", buf);
12280 of = fopen (buf, "w");
12281 pic16_vcg_init (of);
12282 pic16_vcg_dump (of, pb);
12283 pic16_vcg_close (of);
12288 /*** END of helpers for pCode dataflow optimizations ***/