1 /*-------------------------------------------------------------------------
3 pcode.c - post code generation
4 Written By - Scott Dattalo scott@dattalo.com
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 -------------------------------------------------------------------------*/
23 #include "common.h" // Include everything in the SDCC src directory
28 #include "pcodeflow.h"
32 pCode *findFunction(char *fname);
34 static void FixRegisterBanking(pBlock *pb,int cur_bank);
36 #if defined(__BORLANDC__) || defined(_MSC_VER)
37 #define STRCASECMP stricmp
39 #define STRCASECMP strcasecmp
42 /****************************************************************/
43 /****************************************************************/
45 peepCommand peepCommands[] = {
47 {NOTBITSKIP, "_NOTBITSKIP_"},
48 {BITSKIP, "_BITSKIP_"},
49 {INVERTBITSKIP, "_INVERTBITSKIP_"},
56 // Eventually this will go into device dependent files:
57 pCodeOpReg pc_status = {{PO_STATUS, "STATUS"}, -1, NULL,0,NULL};
58 pCodeOpReg pc_indf = {{PO_INDF, "INDF"}, -1, NULL,0,NULL};
59 pCodeOpReg pc_fsr = {{PO_FSR, "FSR"}, -1, NULL,0,NULL};
60 pCodeOpReg pc_intcon = {{PO_INTCON, ""}, -1, NULL,0,NULL};
61 pCodeOpReg pc_pcl = {{PO_PCL, "PCL"}, -1, NULL,0,NULL};
62 pCodeOpReg pc_pclath = {{PO_PCLATH, "PCLATH"}, -1, NULL,0,NULL};
64 pCodeOpReg pc_wsave = {{PO_GPR_REGISTER, "WSAVE"}, -1, NULL,0,NULL};
65 pCodeOpReg pc_ssave = {{PO_GPR_REGISTER, "SSAVE"}, -1, NULL,0,NULL};
66 pCodeOpReg pc_psave = {{PO_GPR_REGISTER, "PSAVE"}, -1, NULL,0,NULL};
68 static int mnemonics_initialized = 0;
70 static hTab *pic14MnemonicsHash = NULL;
71 static hTab *pic14pCodePeepCommandsHash = NULL;
74 static pFile *the_pFile = NULL;
75 static pBlock *pb_dead_pcodes = NULL;
77 /* Hardcoded flags to change the behavior of the PIC port */
78 static int peepOptimizing = 0; /* run the peephole optimizer if nonzero */
79 static int functionInlining = 1; /* inline functions if nonzero */
80 int debug_verbose = 0; /* Set true to inundate .asm file */
82 // static int GpCodeSequenceNumber = 1;
85 unsigned maxIdx; /* This keeps track of the maximum register index for call tree register reuse */
86 unsigned peakIdx; /* This keeps track of the peak register index for call tree register reuse */
88 extern void RemoveUnusedRegisters(void);
89 extern void RegsUnMapLiveRanges(void);
90 extern void BuildFlowTree(pBlock *pb);
91 extern void pCodeRegOptimizeRegUsage(int level);
92 extern int picIsInitialized(void);
93 extern const char *pCodeOpType(pCodeOp *pcop);
95 /****************************************************************/
96 /* Forward declarations */
97 /****************************************************************/
99 void unlinkpCode(pCode *pc);
101 static void genericAnalyze(pCode *pc);
102 static void AnalyzeGOTO(pCode *pc);
103 static void AnalyzeSKIP(pCode *pc);
104 static void AnalyzeRETURN(pCode *pc);
107 static void genericDestruct(pCode *pc);
108 static void genericPrint(FILE *of,pCode *pc);
110 static void pCodePrintLabel(FILE *of, pCode *pc);
111 static void pCodePrintFunction(FILE *of, pCode *pc);
112 static void pCodeOpPrint(FILE *of, pCodeOp *pcop);
113 static char *get_op_from_instruction( pCodeInstruction *pcc);
114 char *get_op( pCodeOp *pcop,char *buff,size_t buf_size);
115 int pCodePeepMatchLine(pCodePeep *peepBlock, pCode *pcs, pCode *pcd);
116 int pCodePeepMatchRule(pCode *pc);
117 void pBlockStats(FILE *of, pBlock *pb);
118 pBlock *newpBlock(void);
119 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval);
120 void pCodeRegMapLiveRanges(pBlock *pb);
123 /****************************************************************/
124 /* PIC Instructions */
125 /****************************************************************/
127 pCodeInstruction pciADDWF = {
128 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
141 1,0, // dest, bit instruction
143 0, // literal operand
145 (PCC_W | PCC_REGISTER), // inCond
146 (PCC_REGISTER | PCC_Z) // outCond
149 pCodeInstruction pciADDFW = {
150 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
163 0,0, // dest, bit instruction
165 0, // literal operand
167 (PCC_W | PCC_REGISTER), // inCond
168 (PCC_W | PCC_Z) // outCond
171 pCodeInstruction pciADDLW = {
172 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
185 0,0, // dest, bit instruction
187 1, // literal operand
189 (PCC_W | PCC_LITERAL), // inCond
190 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
193 pCodeInstruction pciANDLW = {
194 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
207 0,0, // dest, bit instruction
209 1, // literal operand
211 (PCC_W | PCC_LITERAL), // inCond
212 (PCC_W | PCC_Z) // outCond
215 pCodeInstruction pciANDWF = {
216 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
229 1,0, // dest, bit instruction
231 0, // literal operand
233 (PCC_W | PCC_REGISTER), // inCond
234 (PCC_REGISTER | PCC_Z) // outCond
237 pCodeInstruction pciANDFW = {
238 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
251 0,0, // dest, bit instruction
253 0, // literal operand
255 (PCC_W | PCC_REGISTER), // inCond
256 (PCC_W | PCC_Z) // outCond
259 pCodeInstruction pciBCF = {
260 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
273 1,1, // dest, bit instruction
275 0, // literal operand
277 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
278 PCC_REGISTER // outCond
281 pCodeInstruction pciBSF = {
282 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
295 1,1, // dest, bit instruction
297 0, // literal operand
299 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
300 (PCC_REGISTER | PCC_EXAMINE_PCOP) // outCond
303 pCodeInstruction pciBTFSC = {
304 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
317 0,1, // dest, bit instruction
319 0, // literal operand
321 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
322 PCC_EXAMINE_PCOP // outCond
325 pCodeInstruction pciBTFSS = {
326 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
339 0,1, // dest, bit instruction
341 0, // literal operand
343 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
344 PCC_EXAMINE_PCOP // outCond
347 pCodeInstruction pciCALL = {
348 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
361 0,0, // dest, bit instruction
363 0, // literal operand
369 pCodeInstruction pciCOMF = {
370 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
383 1,0, // dest, bit instruction
385 0, // literal operand
387 PCC_REGISTER, // inCond
388 PCC_REGISTER // outCond
391 pCodeInstruction pciCOMFW = {
392 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
405 0,0, // dest, bit instruction
407 0, // literal operand
409 PCC_REGISTER, // inCond
413 pCodeInstruction pciCLRF = {
414 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
427 0,0, // dest, bit instruction
429 0, // literal operand
432 PCC_REGISTER // outCond
435 pCodeInstruction pciCLRW = {
436 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
449 0,0, // dest, bit instruction
451 0, // literal operand
457 pCodeInstruction pciCLRWDT = {
458 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
471 0,0, // dest, bit instruction
473 0, // literal operand
479 pCodeInstruction pciDECF = {
480 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
493 1,0, // dest, bit instruction
495 0, // literal operand
497 PCC_REGISTER, // inCond
498 PCC_REGISTER // outCond
501 pCodeInstruction pciDECFW = {
502 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
515 0,0, // dest, bit instruction
517 0, // literal operand
519 PCC_REGISTER, // inCond
523 pCodeInstruction pciDECFSZ = {
524 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
537 1,0, // dest, bit instruction
539 0, // literal operand
541 PCC_REGISTER, // inCond
542 PCC_REGISTER // outCond
545 pCodeInstruction pciDECFSZW = {
546 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
559 0,0, // dest, bit instruction
561 0, // literal operand
563 PCC_REGISTER, // inCond
567 pCodeInstruction pciGOTO = {
568 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
581 0,0, // dest, bit instruction
583 0, // literal operand
589 pCodeInstruction pciINCF = {
590 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
603 1,0, // dest, bit instruction
605 0, // literal operand
607 PCC_REGISTER, // inCond
608 PCC_REGISTER // outCond
611 pCodeInstruction pciINCFW = {
612 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
625 0,0, // dest, bit instruction
627 0, // literal operand
629 PCC_REGISTER, // inCond
633 pCodeInstruction pciINCFSZ = {
634 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
647 1,0, // dest, bit instruction
649 0, // literal operand
651 PCC_REGISTER, // inCond
652 PCC_REGISTER // outCond
655 pCodeInstruction pciINCFSZW = {
656 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
669 0,0, // dest, bit instruction
671 0, // literal operand
673 PCC_REGISTER, // inCond
677 pCodeInstruction pciIORWF = {
678 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
691 1,0, // dest, bit instruction
693 0, // literal operand
695 (PCC_W | PCC_REGISTER), // inCond
696 (PCC_REGISTER | PCC_Z) // outCond
699 pCodeInstruction pciIORFW = {
700 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
713 0,0, // dest, bit instruction
715 0, // literal operand
717 (PCC_W | PCC_REGISTER), // inCond
718 (PCC_W | PCC_Z) // outCond
721 pCodeInstruction pciIORLW = {
722 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
735 0,0, // dest, bit instruction
737 1, // literal operand
739 (PCC_W | PCC_LITERAL), // inCond
740 (PCC_W | PCC_Z) // outCond
743 pCodeInstruction pciMOVF = {
744 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
757 1,0, // dest, bit instruction
759 0, // literal operand
761 PCC_REGISTER, // inCond
765 pCodeInstruction pciMOVFW = {
766 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
779 0,0, // dest, bit instruction
781 0, // literal operand
783 PCC_REGISTER, // inCond
784 (PCC_W | PCC_Z) // outCond
787 pCodeInstruction pciMOVWF = {
788 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
801 0,0, // dest, bit instruction
803 0, // literal operand
806 PCC_REGISTER // outCond
809 pCodeInstruction pciMOVLW = {
810 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
822 0,0, // dest, bit instruction
824 1, // literal operand
826 (PCC_NONE | PCC_LITERAL), // inCond
830 pCodeInstruction pciNOP = {
831 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
843 0,0, // dest, bit instruction
845 0, // literal operand
851 pCodeInstruction pciRETFIE = {
852 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
865 0,0, // dest, bit instruction
867 0, // literal operand
870 PCC_NONE // outCond (not true... affects the GIE bit too)
873 pCodeInstruction pciRETLW = {
874 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
887 0,0, // dest, bit instruction
889 1, // literal operand
891 PCC_LITERAL, // inCond
895 pCodeInstruction pciRETURN = {
896 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
909 0,0, // dest, bit instruction
911 0, // literal operand
917 pCodeInstruction pciRLF = {
918 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
931 1,0, // dest, bit instruction
933 0, // literal operand
935 (PCC_C | PCC_REGISTER), // inCond
936 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
939 pCodeInstruction pciRLFW = {
940 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
953 0,0, // dest, bit instruction
955 0, // literal operand
957 (PCC_C | PCC_REGISTER), // inCond
958 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
961 pCodeInstruction pciRRF = {
962 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
975 1,0, // dest, bit instruction
977 0, // literal operand
979 (PCC_C | PCC_REGISTER), // inCond
980 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
983 pCodeInstruction pciRRFW = {
984 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
997 0,0, // dest, bit instruction
999 0, // literal operand
1001 (PCC_C | PCC_REGISTER), // inCond
1002 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1005 pCodeInstruction pciSUBWF = {
1006 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1012 NULL, // from branch
1019 1,0, // dest, bit instruction
1020 0,0, // branch, skip
1021 0, // literal operand
1023 (PCC_W | PCC_REGISTER), // inCond
1024 (PCC_REGISTER | PCC_Z) // outCond
1027 pCodeInstruction pciSUBFW = {
1028 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1034 NULL, // from branch
1041 0,0, // dest, bit instruction
1042 0,0, // branch, skip
1043 0, // literal operand
1045 (PCC_W | PCC_REGISTER), // inCond
1046 (PCC_W | PCC_Z) // outCond
1049 pCodeInstruction pciSUBLW = {
1050 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1056 NULL, // from branch
1063 0,0, // dest, bit instruction
1064 0,0, // branch, skip
1065 1, // literal operand
1067 (PCC_W | PCC_LITERAL), // inCond
1068 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1071 pCodeInstruction pciSWAPF = {
1072 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1078 NULL, // from branch
1085 1,0, // dest, bit instruction
1086 0,0, // branch, skip
1087 0, // literal operand
1089 (PCC_REGISTER), // inCond
1090 (PCC_REGISTER) // outCond
1093 pCodeInstruction pciSWAPFW = {
1094 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1100 NULL, // from branch
1107 0,0, // dest, bit instruction
1108 0,0, // branch, skip
1109 0, // literal operand
1111 (PCC_REGISTER), // inCond
1115 pCodeInstruction pciTRIS = {
1116 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1122 NULL, // from branch
1129 0,0, // dest, bit instruction
1130 0,0, // branch, skip
1131 0, // literal operand
1134 PCC_REGISTER // outCond
1137 pCodeInstruction pciXORWF = {
1138 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1144 NULL, // from branch
1151 1,0, // dest, bit instruction
1152 0,0, // branch, skip
1153 0, // literal operand
1155 (PCC_W | PCC_REGISTER), // inCond
1156 (PCC_REGISTER | PCC_Z) // outCond
1159 pCodeInstruction pciXORFW = {
1160 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1166 NULL, // from branch
1173 0,0, // dest, bit instruction
1174 0,0, // branch, skip
1175 0, // literal operand
1177 (PCC_W | PCC_REGISTER), // inCond
1178 (PCC_W | PCC_Z) // outCond
1181 pCodeInstruction pciXORLW = {
1182 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1188 NULL, // from branch
1195 0,0, // dest, bit instruction
1196 0,0, // branch, skip
1197 1, // literal operand
1199 (PCC_W | PCC_LITERAL), // inCond
1200 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1204 pCodeInstruction pciBANKSEL = {
1205 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1211 NULL, // from branch
1218 0,0, // dest, bit instruction
1219 0,0, // branch, skip
1220 0, // literal operand
1223 PCC_REGISTER // outCond
1226 pCodeInstruction pciPAGESEL = {
1227 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1233 NULL, // from branch
1240 0,0, // dest, bit instruction
1241 0,0, // branch, skip
1242 0, // literal operand
1245 PCC_REGISTER // outCond
1248 pCodeInstruction *pic14Mnemonics[MAX_PIC14MNEMONICS];
1251 /*-----------------------------------------------------------------*/
1252 /* return a unique ID number to assist pCodes debuging */
1253 /*-----------------------------------------------------------------*/
1254 unsigned PCodeID(void) {
1255 static unsigned int pcodeId = 1; /* unique ID number to be assigned to all pCodes */
1257 static unsigned int stop;
1259 stop++; // Place break point here
1264 #ifdef HAVE_VSNPRINTF
1265 // Alas, vsnprintf is not ANSI standard, and does not exist
1266 // on Solaris (and probably other non-Gnu flavored Unixes).
1268 /*-----------------------------------------------------------------*/
1269 /* SAFE_snprintf - like snprintf except the string pointer is */
1270 /* after the string has been printed to. This is */
1271 /* useful for printing to string as though if it */
1272 /* were a stream. */
1273 /*-----------------------------------------------------------------*/
1274 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1282 va_start(val, format);
1284 vsnprintf(*str, *size, format, val);
1289 if((size_t)len > *size) {
1290 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1291 fprintf(stderr,"len = %d is > str size %d\n",len,(int)*size);
1299 #else // HAVE_VSNPRINTF
1301 // This version is *not* safe, despite the name.
1303 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1307 static char buffer[1024]; /* grossly conservative, but still not inherently safe */
1312 va_start(val, format);
1314 vsprintf(buffer, format, val);
1317 len = strlen(buffer);
1319 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1320 fprintf(stderr,"len = %d is > str size %d\n",len,*size);
1323 strcpy(*str, buffer);
1329 #endif // HAVE_VSNPRINTF
1332 extern void initStack(int base_address, int size);
1333 extern regs *allocProcessorRegister(int rIdx, char * name, short po_type, int alias);
1334 extern regs *allocInternalRegister(int rIdx, char * name, short po_type, int alias);
1335 extern void init_pic(char *);
1337 void pCodeInitRegisters(void)
1339 static int initialized=0;
1340 int shareBankAddress,stkSize;
1346 shareBankAddress = 0x7f; /* FIXME - some PIC ICs like 16C7X which do not have a shared bank need a different approach. */
1347 stkSize = 8; // Set pseudo stack size to 8
1348 initStack(shareBankAddress, stkSize); // Putting the pseudo stack in shared memory so all modules use the same register when passing fn parameters
1349 init_pic(port->processor);
1351 pc_status.r = allocProcessorRegister(IDX_STATUS,"STATUS", PO_STATUS, 0x180);
1352 pc_pcl.r = allocProcessorRegister(IDX_PCL,"PCL", PO_PCL, 0x80);
1353 pc_pclath.r = allocProcessorRegister(IDX_PCLATH,"PCLATH", PO_PCLATH, 0x180);
1354 pc_fsr.r = allocProcessorRegister(IDX_FSR,"FSR", PO_FSR, 0x180);
1355 pc_indf.r = allocProcessorRegister(IDX_INDF,"INDF", PO_INDF, 0x80);
1356 pc_intcon.r = allocProcessorRegister(IDX_INTCON,"INTCON", PO_INTCON, 0x180);
1358 pc_status.rIdx = IDX_STATUS;
1359 pc_fsr.rIdx = IDX_FSR;
1360 pc_indf.rIdx = IDX_INDF;
1361 pc_intcon.rIdx = IDX_INTCON;
1362 pc_pcl.rIdx = IDX_PCL;
1363 pc_pclath.rIdx = IDX_PCLATH;
1365 pc_wsave.r = allocInternalRegister(IDX_WSAVE,"WSAVE", PO_GPR_REGISTER, 0x180); /* Interrupt storage for working register - must be same address in all banks ie section SHAREBANK. */
1366 pc_ssave.r = allocInternalRegister(IDX_SSAVE,"SSAVE", PO_GPR_REGISTER, 0); /* Interrupt storage for status register. */
1367 pc_psave.r = allocInternalRegister(IDX_PSAVE,"PSAVE", PO_GPR_REGISTER, 0); /* Interrupt storage for pclath register. */
1369 pc_wsave.rIdx = pc_wsave.r->rIdx;
1370 pc_ssave.rIdx = pc_ssave.r->rIdx;
1371 pc_psave.rIdx = pc_psave.r->rIdx;
1373 pc_wsave.r->isFixed = 1; /* Some PIC ICs do not have a sharebank - this register needs to be reserved across all banks. */
1374 pc_wsave.r->address = shareBankAddress-stkSize;
1375 pc_ssave.r->isFixed = 1; /* This register must be in the first bank. */
1376 pc_ssave.r->address = shareBankAddress-stkSize-1;
1377 pc_psave.r->isFixed = 1; /* This register must be in the first bank. */
1378 pc_psave.r->address = shareBankAddress-stkSize-2;
1380 /* probably should put this in a separate initialization routine */
1381 pb_dead_pcodes = newpBlock();
1385 /*-----------------------------------------------------------------*/
1386 /* mnem2key - convert a pic mnemonic into a hash key */
1387 /* (BTW - this spreads the mnemonics quite well) */
1389 /*-----------------------------------------------------------------*/
1391 int mnem2key(char const *mnem)
1400 key += toupper(*mnem++) +1;
1404 return (key & 0x1f);
1408 void pic14initMnemonics(void)
1413 pCodeInstruction *pci;
1415 if(mnemonics_initialized)
1418 //FIXME - probably should NULL out the array before making the assignments
1419 //since we check the array contents below this initialization.
1421 pic14Mnemonics[POC_ADDLW] = &pciADDLW;
1422 pic14Mnemonics[POC_ADDWF] = &pciADDWF;
1423 pic14Mnemonics[POC_ADDFW] = &pciADDFW;
1424 pic14Mnemonics[POC_ANDLW] = &pciANDLW;
1425 pic14Mnemonics[POC_ANDWF] = &pciANDWF;
1426 pic14Mnemonics[POC_ANDFW] = &pciANDFW;
1427 pic14Mnemonics[POC_BCF] = &pciBCF;
1428 pic14Mnemonics[POC_BSF] = &pciBSF;
1429 pic14Mnemonics[POC_BTFSC] = &pciBTFSC;
1430 pic14Mnemonics[POC_BTFSS] = &pciBTFSS;
1431 pic14Mnemonics[POC_CALL] = &pciCALL;
1432 pic14Mnemonics[POC_COMF] = &pciCOMF;
1433 pic14Mnemonics[POC_COMFW] = &pciCOMFW;
1434 pic14Mnemonics[POC_CLRF] = &pciCLRF;
1435 pic14Mnemonics[POC_CLRW] = &pciCLRW;
1436 pic14Mnemonics[POC_CLRWDT] = &pciCLRWDT;
1437 pic14Mnemonics[POC_DECF] = &pciDECF;
1438 pic14Mnemonics[POC_DECFW] = &pciDECFW;
1439 pic14Mnemonics[POC_DECFSZ] = &pciDECFSZ;
1440 pic14Mnemonics[POC_DECFSZW] = &pciDECFSZW;
1441 pic14Mnemonics[POC_GOTO] = &pciGOTO;
1442 pic14Mnemonics[POC_INCF] = &pciINCF;
1443 pic14Mnemonics[POC_INCFW] = &pciINCFW;
1444 pic14Mnemonics[POC_INCFSZ] = &pciINCFSZ;
1445 pic14Mnemonics[POC_INCFSZW] = &pciINCFSZW;
1446 pic14Mnemonics[POC_IORLW] = &pciIORLW;
1447 pic14Mnemonics[POC_IORWF] = &pciIORWF;
1448 pic14Mnemonics[POC_IORFW] = &pciIORFW;
1449 pic14Mnemonics[POC_MOVF] = &pciMOVF;
1450 pic14Mnemonics[POC_MOVFW] = &pciMOVFW;
1451 pic14Mnemonics[POC_MOVLW] = &pciMOVLW;
1452 pic14Mnemonics[POC_MOVWF] = &pciMOVWF;
1453 pic14Mnemonics[POC_NOP] = &pciNOP;
1454 pic14Mnemonics[POC_RETFIE] = &pciRETFIE;
1455 pic14Mnemonics[POC_RETLW] = &pciRETLW;
1456 pic14Mnemonics[POC_RETURN] = &pciRETURN;
1457 pic14Mnemonics[POC_RLF] = &pciRLF;
1458 pic14Mnemonics[POC_RLFW] = &pciRLFW;
1459 pic14Mnemonics[POC_RRF] = &pciRRF;
1460 pic14Mnemonics[POC_RRFW] = &pciRRFW;
1461 pic14Mnemonics[POC_SUBLW] = &pciSUBLW;
1462 pic14Mnemonics[POC_SUBWF] = &pciSUBWF;
1463 pic14Mnemonics[POC_SUBFW] = &pciSUBFW;
1464 pic14Mnemonics[POC_SWAPF] = &pciSWAPF;
1465 pic14Mnemonics[POC_SWAPFW] = &pciSWAPFW;
1466 pic14Mnemonics[POC_TRIS] = &pciTRIS;
1467 pic14Mnemonics[POC_XORLW] = &pciXORLW;
1468 pic14Mnemonics[POC_XORWF] = &pciXORWF;
1469 pic14Mnemonics[POC_XORFW] = &pciXORFW;
1470 pic14Mnemonics[POC_BANKSEL] = &pciBANKSEL;
1471 pic14Mnemonics[POC_PAGESEL] = &pciPAGESEL;
1473 for(i=0; i<MAX_PIC14MNEMONICS; i++)
1474 if(pic14Mnemonics[i])
1475 hTabAddItem(&pic14MnemonicsHash, mnem2key(pic14Mnemonics[i]->mnemonic), pic14Mnemonics[i]);
1476 pci = hTabFirstItem(pic14MnemonicsHash, &key);
1479 DFPRINTF((stderr, "element %d key %d, mnem %s\n",i++,key,pci->mnemonic));
1480 pci = hTabNextItem(pic14MnemonicsHash, &key);
1483 mnemonics_initialized = 1;
1486 int getpCodePeepCommand(char *cmd);
1488 int getpCode(char *mnem,unsigned dest)
1491 pCodeInstruction *pci;
1492 int key = mnem2key(mnem);
1494 if(!mnemonics_initialized)
1495 pic14initMnemonics();
1497 pci = hTabFirstItemWK(pic14MnemonicsHash, key);
1501 if(STRCASECMP(pci->mnemonic, mnem) == 0) {
1502 if((pci->num_ops <= 1) || (pci->isModReg == dest) || (pci->isBitInst))
1506 pci = hTabNextItemWK (pic14MnemonicsHash);
1513 /*-----------------------------------------------------------------*
1514 * pic14initpCodePeepCommands
1516 *-----------------------------------------------------------------*/
1517 void pic14initpCodePeepCommands(void)
1525 hTabAddItem(&pic14pCodePeepCommandsHash,
1526 mnem2key(peepCommands[i].cmd), &peepCommands[i]);
1528 } while (peepCommands[i].cmd);
1530 pcmd = hTabFirstItem(pic14pCodePeepCommandsHash, &key);
1533 //fprintf(stderr, "peep command %s key %d\n",pcmd->cmd,pcmd->id);
1534 pcmd = hTabNextItem(pic14pCodePeepCommandsHash, &key);
1539 /*-----------------------------------------------------------------
1542 *-----------------------------------------------------------------*/
1544 int getpCodePeepCommand(char *cmd)
1548 int key = mnem2key(cmd);
1551 pcmd = hTabFirstItemWK(pic14pCodePeepCommandsHash, key);
1554 // fprintf(stderr," comparing %s to %s\n",pcmd->cmd,cmd);
1555 if(STRCASECMP(pcmd->cmd, cmd) == 0) {
1559 pcmd = hTabNextItemWK (pic14pCodePeepCommandsHash);
1566 char getpBlock_dbName(pBlock *pb)
1572 return pb->cmemmap->dbName;
1576 void pBlockConvert2ISR(pBlock *pb)
1587 /*-----------------------------------------------------------------*/
1588 /* movepBlock2Head - given the dbname of a pBlock, move all */
1589 /* instances to the front of the doubly linked */
1590 /* list of pBlocks */
1591 /*-----------------------------------------------------------------*/
1593 void movepBlock2Head(char dbName)
1600 pb = the_pFile->pbHead;
1604 if(getpBlock_dbName(pb) == dbName) {
1605 pBlock *pbn = pb->next;
1606 pb->next = the_pFile->pbHead;
1607 the_pFile->pbHead->prev = pb;
1608 the_pFile->pbHead = pb;
1611 pb->prev->next = pbn;
1613 // If the pBlock that we just moved was the last
1614 // one in the link of all of the pBlocks, then we
1615 // need to point the tail to the block just before
1616 // the one we moved.
1617 // Note: if pb->next is NULL, then pb must have
1618 // been the last pBlock in the chain.
1621 pbn->prev = pb->prev;
1623 the_pFile->pbTail = pb->prev;
1634 void copypCode(FILE *of, char dbName)
1638 if(!of || !the_pFile)
1641 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1642 if(getpBlock_dbName(pb) == dbName) {
1650 void pcode_test(void)
1653 DFPRINTF((stderr,"pcode is alive!\n"));
1663 /* create the file name */
1664 strcpy(buffer,dstFileName);
1665 strcat(buffer,".p");
1667 if( !(pFile = fopen(buffer, "w" ))) {
1668 werror(E_FILE_OPEN_ERR,buffer);
1672 fprintf(pFile,"pcode dump\n\n");
1674 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1675 fprintf(pFile,"\n\tNew pBlock\n\n");
1677 fprintf(pFile,"%s",pb->cmemmap->sname);
1679 fprintf(pFile,"internal pblock");
1681 fprintf(pFile,", dbName =%c\n",getpBlock_dbName(pb));
1682 printpBlock(pFile,pb);
1686 /*-----------------------------------------------------------------*/
1687 /* int RegCond(pCodeOp *pcop) - if pcop points to the STATUS reg- */
1688 /* ister, RegCond will return the bit being referenced. */
1690 /* fixme - why not just OR in the pcop bit field */
1691 /*-----------------------------------------------------------------*/
1693 static int RegCond(pCodeOp *pcop)
1699 if (pcop->type == PO_GPR_BIT) {
1700 char *name = pcop->name;
1702 name = PCOR(pcop)->r->name;
1703 // if (strcmp(name, pc_status.pcop.name) != 0) { <<< This breaks the peep 2 optimisation
1704 switch(PCORB(pcop)->bit) {
1718 /*-----------------------------------------------------------------*/
1719 /* newpCode - create and return a newly initialized pCode */
1721 /* fixme - rename this */
1723 /* The purpose of this routine is to create a new Instruction */
1724 /* pCode. This is called by gen.c while the assembly code is being */
1728 /* PIC_OPCODE op - the assembly instruction we wish to create. */
1729 /* (note that the op is analogous to but not the */
1730 /* same thing as the opcode of the instruction.) */
1731 /* pCdoeOp *pcop - pointer to the operand of the instruction. */
1734 /* a pointer to the new malloc'd pCode is returned. */
1738 /*-----------------------------------------------------------------*/
1739 pCode *newpCode (PIC_OPCODE op, pCodeOp *pcop)
1741 pCodeInstruction *pci ;
1743 if(!mnemonics_initialized)
1744 pic14initMnemonics();
1746 pci = Safe_calloc(1, sizeof(pCodeInstruction));
1748 if((op>=0) && (op < MAX_PIC14MNEMONICS) && pic14Mnemonics[op]) {
1749 memcpy(pci, pic14Mnemonics[op], sizeof(pCodeInstruction));
1750 pci->pc.id = PCodeID();
1753 if(pci->inCond & PCC_EXAMINE_PCOP)
1754 pci->inCond |= RegCond(pcop);
1756 if(pci->outCond & PCC_EXAMINE_PCOP)
1757 pci->outCond |= RegCond(pcop);
1759 pci->pc.prev = pci->pc.next = NULL;
1760 return (pCode *)pci;
1763 fprintf(stderr, "pCode mnemonic error %s,%d\n",__FUNCTION__,__LINE__);
1769 /*-----------------------------------------------------------------*/
1770 /* newpCodeWild - create a "wild" as in wild card pCode */
1772 /* Wild pcodes are used during the peep hole optimizer to serve */
1773 /* as place holders for any instruction. When a snippet of code is */
1774 /* compared to a peep hole rule, the wild card opcode will match */
1775 /* any instruction. However, the optional operand and label are */
1776 /* additional qualifiers that must also be matched before the */
1777 /* line (of assembly code) is declared matched. Note that the */
1778 /* operand may be wild too. */
1780 /* Note, a wild instruction is specified just like a wild var: */
1781 /* %4 ; A wild instruction, */
1782 /* See the peeph.def file for additional examples */
1784 /*-----------------------------------------------------------------*/
1786 pCode *newpCodeWild(int pCodeID, pCodeOp *optional_operand, pCodeOp *optional_label)
1791 pcw = Safe_calloc(1,sizeof(pCodeWild));
1793 pcw->pci.pc.type = PC_WILD;
1794 pcw->pci.pc.prev = pcw->pci.pc.next = NULL;
1795 pcw->id = PCodeID();
1796 pcw->pci.from = pcw->pci.to = pcw->pci.label = NULL;
1797 pcw->pci.pc.pb = NULL;
1799 // pcw->pci.pc.analyze = genericAnalyze;
1800 pcw->pci.pc.destruct = genericDestruct;
1801 pcw->pci.pc.print = genericPrint;
1803 pcw->id = pCodeID; // this is the 'n' in %n
1804 pcw->operand = optional_operand;
1805 pcw->label = optional_label;
1807 pcw->mustBeBitSkipInst = 0;
1808 pcw->mustNotBeBitSkipInst = 0;
1809 pcw->invertBitSkipInst = 0;
1811 return ( (pCode *)pcw);
1815 /*-----------------------------------------------------------------*/
1816 /* newPcodeInlineP - create a new pCode from a char string */
1817 /*-----------------------------------------------------------------*/
1820 pCode *newpCodeInlineP(char *cP)
1825 pcc = Safe_calloc(1,sizeof(pCodeComment));
1827 pcc->pc.type = PC_INLINE;
1828 pcc->pc.prev = pcc->pc.next = NULL;
1829 pcc->pc.id = PCodeID();
1830 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1833 // pcc->pc.analyze = genericAnalyze;
1834 pcc->pc.destruct = genericDestruct;
1835 pcc->pc.print = genericPrint;
1838 pcc->comment = Safe_strdup(cP);
1840 pcc->comment = NULL;
1842 return ( (pCode *)pcc);
1846 /*-----------------------------------------------------------------*/
1847 /* newPcodeCharP - create a new pCode from a char string */
1848 /*-----------------------------------------------------------------*/
1850 pCode *newpCodeCharP(char *cP)
1855 pcc = Safe_calloc(1,sizeof(pCodeComment));
1857 pcc->pc.type = PC_COMMENT;
1858 pcc->pc.prev = pcc->pc.next = NULL;
1859 pcc->pc.id = PCodeID();
1860 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1863 // pcc->pc.analyze = genericAnalyze;
1864 pcc->pc.destruct = genericDestruct;
1865 pcc->pc.print = genericPrint;
1868 pcc->comment = Safe_strdup(cP);
1870 pcc->comment = NULL;
1872 return ( (pCode *)pcc);
1876 /*-----------------------------------------------------------------*/
1877 /* newpCodeFunction - */
1878 /*-----------------------------------------------------------------*/
1881 pCode *newpCodeFunction(char *mod,char *f,int isPublic)
1885 pcf = Safe_calloc(1,sizeof(pCodeFunction));
1886 //_ALLOC(pcf,sizeof(pCodeFunction));
1888 pcf->pc.type = PC_FUNCTION;
1889 pcf->pc.prev = pcf->pc.next = NULL;
1890 pcf->pc.id = PCodeID();
1891 //pcf->pc.from = pcf->pc.to = pcf->pc.label = NULL;
1894 // pcf->pc.analyze = genericAnalyze;
1895 pcf->pc.destruct = genericDestruct;
1896 pcf->pc.print = pCodePrintFunction;
1901 //_ALLOC_ATOMIC(pcf->modname,strlen(mod)+1);
1902 pcf->modname = Safe_calloc(1,strlen(mod)+1);
1903 strcpy(pcf->modname,mod);
1905 pcf->modname = NULL;
1908 //_ALLOC_ATOMIC(pcf->fname,strlen(f)+1);
1909 pcf->fname = Safe_calloc(1,strlen(f)+1);
1910 strcpy(pcf->fname,f);
1914 pcf->isPublic = (unsigned)isPublic;
1916 return ( (pCode *)pcf);
1920 /*-----------------------------------------------------------------*/
1922 /*-----------------------------------------------------------------*/
1923 void destructpCodeFlow(pCode *pc)
1925 if(!pc || !isPCFL(pc))
1934 deleteSet(&PCFL(pc)->registers);
1935 deleteSet(&PCFL(pc)->from);
1936 deleteSet(&PCFL(pc)->to);
1941 pCode *newpCodeFlow(void )
1945 //_ALLOC(pcflow,sizeof(pCodeFlow));
1946 pcflow = Safe_calloc(1,sizeof(pCodeFlow));
1948 pcflow->pc.type = PC_FLOW;
1949 pcflow->pc.prev = pcflow->pc.next = NULL;
1950 pcflow->pc.pb = NULL;
1952 // pcflow->pc.analyze = genericAnalyze;
1953 pcflow->pc.destruct = destructpCodeFlow;
1954 pcflow->pc.print = genericPrint;
1956 pcflow->pc.seq = GpcFlowSeq++;
1958 pcflow->from = pcflow->to = NULL;
1960 pcflow->inCond = PCC_NONE;
1961 pcflow->outCond = PCC_NONE;
1963 pcflow->firstBank = 'U'; /* Undetermined */
1964 pcflow->lastBank = 'U'; /* Undetermined */
1966 pcflow->FromConflicts = 0;
1967 pcflow->ToConflicts = 0;
1971 pcflow->registers = newSet();
1973 return ( (pCode *)pcflow);
1977 /*-----------------------------------------------------------------*/
1978 /*-----------------------------------------------------------------*/
1979 pCodeFlowLink *newpCodeFlowLink(pCodeFlow *pcflow)
1981 pCodeFlowLink *pcflowLink;
1983 pcflowLink = Safe_calloc(1,sizeof(pCodeFlowLink));
1985 pcflowLink->pcflow = pcflow;
1986 pcflowLink->bank_conflict = 0;
1991 /*-----------------------------------------------------------------*/
1992 /* newpCodeCSource - create a new pCode Source Symbol */
1993 /*-----------------------------------------------------------------*/
1995 pCode *newpCodeCSource(int ln, char *f, char *l)
2000 pccs = Safe_calloc(1,sizeof(pCodeCSource));
2002 pccs->pc.type = PC_CSOURCE;
2003 pccs->pc.prev = pccs->pc.next = NULL;
2004 pccs->pc.id = PCodeID();
2007 pccs->pc.destruct = genericDestruct;
2008 pccs->pc.print = genericPrint;
2010 pccs->line_number = ln;
2012 pccs->line = Safe_strdup(l);
2017 pccs->file_name = Safe_strdup(f);
2019 pccs->file_name = NULL;
2021 return ( (pCode *)pccs);
2024 /*-----------------------------------------------------------------*/
2025 /* pCodeLabelDestruct - free memory used by a label. */
2026 /*-----------------------------------------------------------------*/
2027 static void pCodeLabelDestruct(pCode *pc)
2033 if((pc->type == PC_LABEL) && PCL(pc)->label)
2034 free(PCL(pc)->label);
2040 pCode *newpCodeLabel(char *name, int key)
2046 pcl = Safe_calloc(1,sizeof(pCodeLabel) );
2048 pcl->pc.type = PC_LABEL;
2049 pcl->pc.prev = pcl->pc.next = NULL;
2050 pcl->pc.id = PCodeID();
2051 //pcl->pc.from = pcl->pc.to = pcl->pc.label = NULL;
2054 // pcl->pc.analyze = genericAnalyze;
2055 pcl->pc.destruct = pCodeLabelDestruct;
2056 pcl->pc.print = pCodePrintLabel;
2062 sprintf(s,"_%05d_DS_",key);
2067 pcl->label = Safe_strdup(s);
2069 //fprintf(stderr,"newpCodeLabel: key=%d, name=%s\n",key, ((s)?s:""));
2070 return ( (pCode *)pcl);
2075 /*-----------------------------------------------------------------*/
2076 /* newpBlock - create and return a pointer to a new pBlock */
2077 /*-----------------------------------------------------------------*/
2078 pBlock *newpBlock(void)
2083 PpB = Safe_calloc(1,sizeof(pBlock) );
2084 PpB->next = PpB->prev = NULL;
2086 PpB->function_entries = PpB->function_exits = PpB->function_calls = NULL;
2087 PpB->tregisters = NULL;
2089 PpB->FlowTree = NULL;
2095 /*-----------------------------------------------------------------*/
2096 /* newpCodeChain - create a new chain of pCodes */
2097 /*-----------------------------------------------------------------*
2099 * This function will create a new pBlock and the pointer to the
2100 * pCode that is passed in will be the first pCode in the block.
2101 *-----------------------------------------------------------------*/
2104 pBlock *newpCodeChain(memmap *cm,char c, pCode *pc)
2107 pBlock *pB = newpBlock();
2109 pB->pcHead = pB->pcTail = pc;
2116 /*-----------------------------------------------------------------*/
2117 /* newpCodeOpLabel - Create a new label given the key */
2118 /* Note, a negative key means that the label is part of wild card */
2119 /* (and hence a wild card label) used in the pCodePeep */
2120 /* optimizations). */
2121 /*-----------------------------------------------------------------*/
2123 pCodeOp *newpCodeOpLabel(char *name, int key)
2126 static int label_key=-1;
2130 pcop = Safe_calloc(1,sizeof(pCodeOpLabel) );
2131 pcop->type = PO_LABEL;
2136 sprintf(s=buffer,"_%05d_DS_",key);
2138 s = name, key = label_key--;
2140 PCOLAB(pcop)->offset = 0;
2142 pcop->name = Safe_strdup(s);
2144 ((pCodeOpLabel *)pcop)->key = key;
2146 //fprintf(stderr,"newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
2150 /*-----------------------------------------------------------------*/
2151 /*-----------------------------------------------------------------*/
2152 pCodeOp *newpCodeOpLit(int lit)
2158 pcop = Safe_calloc(1,sizeof(pCodeOpLit) );
2159 pcop->type = PO_LITERAL;
2163 sprintf(s,"0x%02x",lit);
2165 pcop->name = Safe_strdup(s);
2168 ((pCodeOpLit *)pcop)->lit = lit;
2173 /*-----------------------------------------------------------------*/
2174 /*-----------------------------------------------------------------*/
2175 pCodeOp *newpCodeOpImmd(char *name, int offset, int index, int code_space, int is_func)
2179 pcop = Safe_calloc(1,sizeof(pCodeOpImmd) );
2180 pcop->type = PO_IMMEDIATE;
2183 pcop->name = Safe_strdup(name);
2186 r = dirregWithName(name);
2190 //fprintf(stderr, " newpCodeOpImmd reg %s exists\n",name);
2191 PCOI(pcop)->rIdx = r->rIdx;
2193 //fprintf(stderr, " newpCodeOpImmd reg %s doesn't exist\n",name);
2194 PCOI(pcop)->rIdx = -1;
2196 //fprintf(stderr,"%s %s %d\n",__FUNCTION__,name,offset);
2201 PCOI(pcop)->index = index;
2202 PCOI(pcop)->offset = offset;
2203 PCOI(pcop)->_const = code_space;
2204 PCOI(pcop)->_function = is_func;
2209 /*-----------------------------------------------------------------*/
2210 /*-----------------------------------------------------------------*/
2211 pCodeOp *newpCodeOpWild(int id, pCodeWildBlock *pcwb, pCodeOp *subtype)
2217 if(!pcwb || !subtype) {
2218 fprintf(stderr, "Wild opcode declaration error: %s-%d\n",__FILE__,__LINE__);
2222 pcop = Safe_calloc(1,sizeof(pCodeOpWild));
2223 pcop->type = PO_WILD;
2224 sprintf(s,"%%%d",id);
2225 pcop->name = Safe_strdup(s);
2227 PCOW(pcop)->id = id;
2228 PCOW(pcop)->pcwb = pcwb;
2229 PCOW(pcop)->subtype = subtype;
2230 PCOW(pcop)->matched = NULL;
2234 /*-----------------------------------------------------------------*/
2235 /* Find a symbol with matching name */
2236 /*-----------------------------------------------------------------*/
2237 static symbol *symFindWithName(memmap * map, const char *name)
2241 for (sym = setFirstItem(map->syms); sym; sym = setNextItem (map->syms)) {
2242 if (sym->rname && (strcmp(sym->rname,name)==0))
2248 /*-----------------------------------------------------------------*/
2249 /*-----------------------------------------------------------------*/
2250 pCodeOp *newpCodeOpBit(char *name, int ibit, int inBitSpace)
2255 pcop = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2256 pcop->type = PO_GPR_BIT;
2258 PCORB(pcop)->bit = ibit;
2259 PCORB(pcop)->inBitSpace = inBitSpace;
2261 if (name) r = regFindWithName(name);
2263 // Register has not been allocated - check for symbol information
2265 sym = symFindWithName(bit, name);
2266 if (!sym) sym = symFindWithName(sfrbit, name);
2267 if (!sym) sym = symFindWithName(sfr, name);
2269 r = allocNewDirReg(sym->etype,name);
2275 PCOR(pcop)->rIdx = r->rIdx;
2277 pcop->name = Safe_strdup(name);
2278 PCOR(pcop)->r = NULL;
2279 PCOR(pcop)->rIdx = 0;
2284 /*-----------------------------------------------------------------*
2285 * pCodeOp *newpCodeOpReg(int rIdx) - allocate a new register
2287 * If rIdx >=0 then a specific register from the set of registers
2288 * will be selected. If rIdx <0, then a new register will be searched
2290 *-----------------------------------------------------------------*/
2292 pCodeOp *newpCodeOpReg(int rIdx)
2296 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2301 PCOR(pcop)->rIdx = rIdx;
2302 PCOR(pcop)->r = pic14_regWithIdx(rIdx);
2304 PCOR(pcop)->r = pic14_findFreeReg(REG_GPR);
2307 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2311 pcop->type = PCOR(pcop)->r->pc_type;
2316 pCodeOp *newpCodeOpRegFromStr(char *name)
2320 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2321 PCOR(pcop)->r = allocRegByName(name, 1);
2322 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2323 pcop->type = PCOR(pcop)->r->pc_type;
2324 pcop->name = PCOR(pcop)->r->name;
2329 pCodeOp *newpCodeOpStr(char *name)
2333 pcop = Safe_calloc(1,sizeof(pCodeOpStr));
2334 pcop->type = PO_STR;
2335 pcop->name = Safe_strdup(name);
2337 PCOS(pcop)->isPublic = 0;
2343 /*-----------------------------------------------------------------*/
2344 /*-----------------------------------------------------------------*/
2346 pCodeOp *newpCodeOp(char *name, PIC_OPTYPE type)
2353 pcop = newpCodeOpBit(name, -1,0);
2357 pcop = newpCodeOpLit(-1);
2361 pcop = newpCodeOpLabel(NULL,-1);
2365 pcop = newpCodeOpReg(-1);
2368 case PO_GPR_POINTER:
2369 case PO_GPR_REGISTER:
2371 pcop = newpCodeOpRegFromStr(name);
2373 pcop = newpCodeOpReg(-1);
2377 pcop = newpCodeOpStr(name);
2381 pcop = Safe_calloc(1,sizeof(pCodeOp) );
2384 pcop->name = Safe_strdup(name);
2392 /*-----------------------------------------------------------------*/
2393 /*-----------------------------------------------------------------*/
2394 void pCodeConstString(char *name, char *value)
2398 // fprintf(stderr, " %s %s %s\n",__FUNCTION__,name,value);
2403 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2407 sprintf(buffer,"; %s = %s",name,value);
2409 addpCode2pBlock(pb,newpCodeCharP(buffer));
2410 addpCode2pBlock(pb,newpCodeLabel(name,-1));
2413 addpCode2pBlock(pb,newpCode(POC_RETLW,newpCodeOpLit(*value)));
2419 /*-----------------------------------------------------------------*/
2420 /*-----------------------------------------------------------------*/
2421 void pCodeReadCodeTable(void)
2425 fprintf(stderr, " %s\n",__FUNCTION__);
2427 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2431 addpCode2pBlock(pb,newpCodeCharP("; ReadCodeTable - built in function"));
2432 addpCode2pBlock(pb,newpCodeCharP("; Inputs: temp1,temp2 = code pointer"));
2433 addpCode2pBlock(pb,newpCodeCharP("; Outpus: W (from RETLW at temp2:temp1)"));
2434 addpCode2pBlock(pb,newpCodeLabel("ReadCodeTable:",-1));
2436 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp2")));
2437 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCLATH")));
2438 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp1")));
2439 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCL")));
2444 /*-----------------------------------------------------------------*/
2445 /* addpCode2pBlock - place the pCode into the pBlock linked list */
2446 /*-----------------------------------------------------------------*/
2447 void addpCode2pBlock(pBlock *pb, pCode *pc)
2454 /* If this is the first pcode to be added to a block that
2455 * was initialized with a NULL pcode, then go ahead and
2456 * make this pcode the head and tail */
2457 pb->pcHead = pb->pcTail = pc;
2460 pb->pcTail->next = pc;
2462 pc->prev = pb->pcTail;
2469 /*-----------------------------------------------------------------*/
2470 /* addpBlock - place a pBlock into the pFile */
2471 /*-----------------------------------------------------------------*/
2472 void addpBlock(pBlock *pb)
2474 // fprintf(stderr," Adding pBlock: dbName =%c\n",getpBlock_dbName(pb));
2477 /* First time called, we'll pass through here. */
2478 //_ALLOC(the_pFile,sizeof(pFile));
2479 the_pFile = Safe_calloc(1,sizeof(pFile));
2480 the_pFile->pbHead = the_pFile->pbTail = pb;
2481 the_pFile->functions = NULL;
2485 the_pFile->pbTail->next = pb;
2486 pb->prev = the_pFile->pbTail;
2488 the_pFile->pbTail = pb;
2491 /*-----------------------------------------------------------------*/
2492 /* removepBlock - remove a pBlock from the pFile */
2493 /*-----------------------------------------------------------------*/
2494 void removepBlock(pBlock *pb)
2502 //fprintf(stderr," Removing pBlock: dbName =%c\n",getpBlock_dbName(pb));
2504 for(pbs = the_pFile->pbHead; pbs; pbs = pbs->next) {
2507 if(pbs == the_pFile->pbHead)
2508 the_pFile->pbHead = pbs->next;
2510 if (pbs == the_pFile->pbTail)
2511 the_pFile->pbTail = pbs->prev;
2514 pbs->next->prev = pbs->prev;
2517 pbs->prev->next = pbs->next;
2524 fprintf(stderr, "Warning: call to %s:%s didn't find pBlock\n",__FILE__,__FUNCTION__);
2528 /*-----------------------------------------------------------------*/
2529 /* printpCode - write the contents of a pCode to a file */
2530 /*-----------------------------------------------------------------*/
2531 void printpCode(FILE *of, pCode *pc)
2542 fprintf(of,"warning - unable to print pCode\n");
2545 /*-----------------------------------------------------------------*/
2546 /* printpBlock - write the contents of a pBlock to a file */
2547 /*-----------------------------------------------------------------*/
2548 void printpBlock(FILE *of, pBlock *pb)
2558 for(pc = pb->pcHead; pc; pc = pc->next)
2563 /*-----------------------------------------------------------------*/
2565 /* pCode processing */
2569 /*-----------------------------------------------------------------*/
2571 void unlinkpCode(pCode *pc)
2577 fprintf(stderr,"Unlinking: ");
2578 printpCode(stderr, pc);
2581 pc->prev->next = pc->next;
2583 pc->next->prev = pc->prev;
2585 pc->prev = pc->next = NULL;
2589 /*-----------------------------------------------------------------*/
2590 /*-----------------------------------------------------------------*/
2592 static void genericDestruct(pCode *pc)
2598 /* For instructions, tell the register (if there's one used)
2599 * that it's no longer needed */
2600 regs *reg = getRegFromInstruction(pc);
2602 deleteSetItem (&(reg->reglives.usedpCodes),pc);
2605 /* Instead of deleting the memory used by this pCode, mark
2606 * the object as bad so that if there's a pointer to this pCode
2607 * dangling around somewhere then (hopefully) when the type is
2608 * checked we'll catch it.
2613 addpCode2pBlock(pb_dead_pcodes, pc);
2620 /*-----------------------------------------------------------------*/
2621 /* Copies the pCodeInstruction flow pointer from source pCode */
2622 /*-----------------------------------------------------------------*/
2623 static void CopyFlow(pCodeInstruction *pcd, pCode *pcs) {
2625 pCodeFlow *pcflow = 0;
2626 for (p=pcs; p; p=p->prev) {
2628 pcflow = PCI(p)->pcflow;
2632 pcflow = (pCodeFlow*)p;
2636 PCI(pcd)->pcflow = pcflow;
2639 /*-----------------------------------------------------------------*/
2640 /* pCodeInsertAfter - splice in the pCode chain starting with pc2 */
2641 /* into the pCode chain containing pc1 */
2642 /*-----------------------------------------------------------------*/
2643 void pCodeInsertAfter(pCode *pc1, pCode *pc2)
2649 pc2->next = pc1->next;
2651 pc1->next->prev = pc2;
2657 /* If this is an instrution type propogate the flow */
2659 CopyFlow(PCI(pc2),pc1);
2662 /*------------------------------------------------------------------*/
2663 /* pCodeInsertBefore - splice in the pCode chain starting with pc2 */
2664 /* into the pCode chain containing pc1 */
2665 /*------------------------------------------------------------------*/
2666 void pCodeInsertBefore(pCode *pc1, pCode *pc2)
2672 pc2->prev = pc1->prev;
2674 pc1->prev->next = pc2;
2680 /* If this is an instrution type propogate the flow */
2682 CopyFlow(PCI(pc2),pc1);
2685 /*-----------------------------------------------------------------*/
2686 /* pCodeOpCopy - copy a pcode operator */
2687 /*-----------------------------------------------------------------*/
2688 pCodeOp *pCodeOpCopy(pCodeOp *pcop)
2690 pCodeOp *pcopnew=NULL;
2695 switch(pcop->type) {
2698 //DFPRINTF((stderr,"pCodeOpCopy bit\n"));
2699 pcopnew = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2700 PCORB(pcopnew)->bit = PCORB(pcop)->bit;
2701 PCORB(pcopnew)->inBitSpace = PCORB(pcop)->inBitSpace;
2706 /* Here we expand the wild card into the appropriate type: */
2707 /* By recursively calling pCodeOpCopy */
2708 //DFPRINTF((stderr,"pCodeOpCopy wild\n"));
2709 if(PCOW(pcop)->matched)
2710 pcopnew = pCodeOpCopy(PCOW(pcop)->matched);
2713 pcopnew = pCodeOpCopy(PCOW(pcop)->subtype);
2714 pcopnew->name = Safe_strdup(PCOW(pcop)->pcwb->vars[PCOW(pcop)->id]);
2715 //DFPRINTF((stderr,"copied a wild op named %s\n",pcopnew->name));
2722 //DFPRINTF((stderr,"pCodeOpCopy label\n"));
2723 pcopnew = Safe_calloc(1,sizeof(pCodeOpLabel) );
2724 PCOLAB(pcopnew)->key = PCOLAB(pcop)->key;
2728 pcopnew = Safe_calloc(1,sizeof(pCodeOpImmd) );
2729 PCOI(pcopnew)->index = PCOI(pcop)->index;
2730 PCOI(pcopnew)->offset = PCOI(pcop)->offset;
2731 PCOI(pcopnew)->_const = PCOI(pcop)->_const;
2732 PCOI(pcopnew)->_function = PCOI(pcop)->_function;
2736 //DFPRINTF((stderr,"pCodeOpCopy lit\n"));
2737 pcopnew = Safe_calloc(1,sizeof(pCodeOpLit) );
2738 PCOL(pcopnew)->lit = PCOL(pcop)->lit;
2743 pcopnew = newpCodeOpBit(pcop->name, PCORB(pcop)->bit,PCORB(pcop)->inBitSpace);
2744 PCOR(pcopnew)->r = PCOR(pcop)->r;
2745 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2746 DFPRINTF((stderr," pCodeOpCopy Bit -register index\n"));
2750 case PO_GPR_POINTER:
2751 case PO_GPR_REGISTER:
2755 //DFPRINTF((stderr,"pCodeOpCopy GPR register\n"));
2756 pcopnew = Safe_calloc(1,sizeof(pCodeOpReg) );
2757 PCOR(pcopnew)->r = PCOR(pcop)->r;
2758 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2759 PCOR(pcopnew)->instance = PCOR(pcop)->instance;
2760 DFPRINTF((stderr," register index %d\n", PCOR(pcop)->r->rIdx));
2764 //fprintf(stderr,"pCodeOpCopy PO_DIR\n");
2765 pcopnew = Safe_calloc(1,sizeof(pCodeOpReg) );
2766 PCOR(pcopnew)->r = PCOR(pcop)->r;
2767 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2768 PCOR(pcopnew)->instance = PCOR(pcop)->instance;
2771 DFPRINTF((stderr,"pCodeOpCopy PO_STATUS\n"));
2772 case PO_SFR_REGISTER:
2780 //DFPRINTF((stderr,"pCodeOpCopy register type %d\n", pcop->type));
2781 pcopnew = Safe_calloc(1,sizeof(pCodeOp) );
2785 pcopnew->type = pcop->type;
2787 pcopnew->name = Safe_strdup(pcop->name);
2789 pcopnew->name = NULL;
2794 /*-----------------------------------------------------------------*/
2795 /* popCopyReg - copy a pcode operator */
2796 /*-----------------------------------------------------------------*/
2797 pCodeOp *popCopyReg(pCodeOpReg *pc)
2801 pcor = Safe_calloc(1,sizeof(pCodeOpReg) );
2802 pcor->pcop.type = pc->pcop.type;
2804 if(!(pcor->pcop.name = Safe_strdup(pc->pcop.name)))
2805 fprintf(stderr,"oops %s %d",__FILE__,__LINE__);
2807 pcor->pcop.name = NULL;
2810 pcor->rIdx = pc->rIdx;
2813 //DEBUGpic14_emitcode ("; ***","%s , copying %s, rIdx=%d",__FUNCTION__,pc->pcop.name,pc->rIdx);
2818 /*-----------------------------------------------------------------*/
2819 /* pCodeInstructionCopy - copy a pCodeInstructionCopy */
2820 /*-----------------------------------------------------------------*/
2821 pCode *pCodeInstructionCopy(pCodeInstruction *pci,int invert)
2823 pCodeInstruction *new_pci;
2826 new_pci = PCI(newpCode(pci->inverted_op,pci->pcop));
2828 new_pci = PCI(newpCode(pci->op,pci->pcop));
2830 new_pci->pc.pb = pci->pc.pb;
2831 new_pci->from = pci->from;
2832 new_pci->to = pci->to;
2833 new_pci->label = pci->label;
2834 new_pci->pcflow = pci->pcflow;
2836 return PCODE(new_pci);
2839 /*-----------------------------------------------------------------*/
2840 /*-----------------------------------------------------------------*/
2841 void pCodeDeleteChain(pCode *f,pCode *t)
2846 DFPRINTF((stderr,"delete pCode:\n"));
2848 //f->print(stderr,f);
2849 //f->delete(f); this dumps core...
2854 /*-----------------------------------------------------------------*/
2855 /*-----------------------------------------------------------------*/
2856 void pBlockRegs(FILE *of, pBlock *pb)
2861 r = setFirstItem(pb->tregisters);
2863 r = setNextItem(pb->tregisters);
2868 /*-----------------------------------------------------------------*/
2869 /*-----------------------------------------------------------------*/
2870 char *get_op(pCodeOp *pcop,char *buffer, size_t size)
2875 int use_buffer = 1; // copy the string to the passed buffer pointer
2880 use_buffer = 0; // Don't bother copying the string to the buffer.
2884 switch(pcop->type) {
2888 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
2891 //return PCOR(pcop)->r->name;
2895 if (PCOR(pcop)->r->type == REG_STK)
2896 r = typeRegWithIdx(PCOR(pcop)->r->rIdx,REG_STK,1);
2898 r = pic14_regWithIdx(PCOR(pcop)->r->rIdx);
2901 SAFE_snprintf(&buffer,&size,"%s",r->name);
2911 if(PCOI(pcop)->_const) {
2913 if( PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
2914 switch(PCOI(pcop)->offset) {
2916 SAFE_snprintf(&s,&size,"low %s",pcop->name);
2919 SAFE_snprintf(&s,&size,"high %s",pcop->name);
2922 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
2925 8 * PCOI(pcop)->offset );
2928 SAFE_snprintf(&s,&size,"LOW(%s+%d)",pcop->name,PCOI(pcop)->index);
2931 if( PCOI(pcop)->index) { // && PCOI(pcc->pcop)->offset<4) {
2932 SAFE_snprintf(&s,&size,"(%s + %d)",
2934 PCOI(pcop)->index );
2936 switch(PCOI(pcop)->offset) {
2938 SAFE_snprintf(&s,&size,"%s",pcop->name);
2941 SAFE_snprintf(&s,&size,"high %s",pcop->name);
2944 SAFE_snprintf(&s,&size,"(%s >> %d)&0xff",pcop->name, 8*PCOI(pcop)->offset);
2953 //size = sizeof(buffer);
2954 if( PCOR(pcop)->instance) {
2955 SAFE_snprintf(&s,&size,"(%s + %d)",
2957 PCOR(pcop)->instance );
2958 //fprintf(stderr,"PO_DIR %s\n",buffer);
2960 SAFE_snprintf(&s,&size,"%s",pcop->name);
2966 if(PCOLAB(pcop)->offset == 1)
2967 SAFE_snprintf(&s,&size,"HIGH(%s)",pcop->name);
2969 SAFE_snprintf(&s,&size,"%s",pcop->name);
2976 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
2979 return PCOR(pcop)->r->name;
2982 /* fall through to the default case */
2986 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
2994 printf("PIC port internal warning: (%s:%d) %s not found\n",
2999 return "NO operand";
3003 /*-----------------------------------------------------------------*/
3004 /*-----------------------------------------------------------------*/
3005 static char *get_op_from_instruction( pCodeInstruction *pcc)
3009 return get_op(pcc->pcop,NULL,0);
3011 return ("ERROR Null: get_op_from_instruction");
3015 /*-----------------------------------------------------------------*/
3016 /*-----------------------------------------------------------------*/
3017 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
3019 fprintf(of,"pcodeopprint- not implemented\n");
3022 /*-----------------------------------------------------------------*/
3023 /*-----------------------------------------------------------------*/
3024 char *pCode2str(char *str, size_t size, pCode *pc)
3032 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
3034 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
3036 if(PCI(pc)->isBitInst) {
3037 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3038 char *name = PCI(pc)->pcop->name;
3040 name = PCOR(PCI(pc)->pcop)->r->name;
3041 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
3042 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)", name, name);
3044 SAFE_snprintf(&s,&size,"%s,%d", name,
3045 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit)&7);
3046 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3047 SAFE_snprintf(&s,&size,"%s,%d", get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
3049 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", get_op_from_instruction(PCI(pc)));
3050 //PCI(pc)->pcop->t.bit );
3053 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3054 if( PCI(pc)->num_ops == 2)
3055 SAFE_snprintf(&s,&size,"(%s >> 3),%c",get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
3057 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",get_op_from_instruction(PCI(pc)));
3060 SAFE_snprintf(&s,&size,"%s",get_op_from_instruction(PCI(pc)));
3062 if( PCI(pc)->num_ops == 2)
3063 SAFE_snprintf(&s,&size,",%c", ( (PCI(pc)->isModReg) ? 'F':'W'));
3071 /* assuming that comment ends with a \n */
3072 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
3076 /* assuming that inline code ends with a \n */
3077 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
3081 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
3084 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
3087 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
3090 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
3093 SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3097 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
3104 /*-----------------------------------------------------------------*/
3105 /* genericPrint - the contents of a pCode to a file */
3106 /*-----------------------------------------------------------------*/
3107 static void genericPrint(FILE *of, pCode *pc)
3115 fprintf(of,";%s\n", ((pCodeComment *)pc)->comment);
3119 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
3123 // If the opcode has a label, print that first
3125 pBranch *pbl = PCI(pc)->label;
3126 while(pbl && pbl->pc) {
3127 if(pbl->pc->type == PC_LABEL)
3128 pCodePrintLabel(of, pbl->pc);
3134 genericPrint(of,PCODE(PCI(pc)->cline));
3139 pCode2str(str, 256, pc);
3141 fprintf(of,"%s",str);
3145 fprintf(of, "\t;id=%u,key=%03x",pc->id,pc->seq);
3147 fprintf(of,",flow seq=%03x",PCI(pc)->pcflow->pc.seq);
3152 pBranch *dpb = pc->to; // debug
3154 switch ( dpb->pc->type) {
3156 fprintf(of, "\t;%s", PCI(dpb->pc)->mnemonic);
3159 fprintf(of, "\t;label %d", PCL(dpb->pc)->key);
3162 fprintf(of, "\t;function %s", ( (PCF(dpb->pc)->fname) ? (PCF(dpb->pc)->fname) : "[END]"));
3165 fprintf(of, "\t;flow");
3179 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
3180 if(PCW(pc)->pci.label)
3181 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
3183 if(PCW(pc)->operand) {
3184 fprintf(of,";\toperand ");
3185 pCodeOpPrint(of,PCW(pc)->operand );
3191 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
3192 if(PCFL(pc)->ancestor)
3193 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
3200 fprintf(of,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3204 fprintf(of,"unknown pCode type %d\n",pc->type);
3209 /*-----------------------------------------------------------------*/
3210 /* pCodePrintFunction - prints function begin/end */
3211 /*-----------------------------------------------------------------*/
3213 static void pCodePrintFunction(FILE *of, pCode *pc)
3219 if( ((pCodeFunction *)pc)->modname)
3220 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
3222 if(PCF(pc)->fname) {
3223 pBranch *exits = PCF(pc)->to;
3225 fprintf(of,"%s\t;Function start\n",PCF(pc)->fname);
3228 exits = exits->next;
3231 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
3234 if((PCF(pc)->from &&
3235 PCF(pc)->from->pc->type == PC_FUNCTION &&
3236 PCF(PCF(pc)->from->pc)->fname) )
3237 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
3239 fprintf(of,"; exit point [can't find entry point]\n");
3242 /*-----------------------------------------------------------------*/
3243 /* pCodePrintLabel - prints label */
3244 /*-----------------------------------------------------------------*/
3246 static void pCodePrintLabel(FILE *of, pCode *pc)
3253 fprintf(of,"%s\n",PCL(pc)->label);
3254 else if (PCL(pc)->key >=0)
3255 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
3257 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
3260 /*-----------------------------------------------------------------*/
3261 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
3262 /* remove it if it is found. */
3263 /*-----------------------------------------------------------------*/
3264 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
3271 if(pcl->type == PC_OPCODE)
3272 b = PCI(pcl)->label;
3274 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
3279 //fprintf (stderr, "%s \n",__FUNCTION__);
3280 //pcl->print(stderr,pcl);
3281 //pc->print(stderr,pc);
3284 //fprintf (stderr, "found label\n");
3288 bprev->next = b->next; /* Not first pCode in chain */
3292 PCI(pcl)->label = b->next; /* First pCode in chain */
3295 return; /* A label can't occur more than once */
3303 /*-----------------------------------------------------------------*/
3304 /*-----------------------------------------------------------------*/
3305 pBranch * pBranchAppend(pBranch *h, pBranch *n)
3324 /*-----------------------------------------------------------------*/
3325 /* pBranchLink - given two pcodes, this function will link them */
3326 /* together through their pBranches */
3327 /*-----------------------------------------------------------------*/
3328 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
3332 // Declare a new branch object for the 'from' pCode.
3334 //_ALLOC(b,sizeof(pBranch));
3335 b = Safe_calloc(1,sizeof(pBranch));
3336 b->pc = PCODE(t); // The link to the 'to' pCode.
3339 f->to = pBranchAppend(f->to,b);
3341 // Now do the same for the 'to' pCode.
3343 //_ALLOC(b,sizeof(pBranch));
3344 b = Safe_calloc(1,sizeof(pBranch));
3348 t->from = pBranchAppend(t->from,b);
3353 /*-----------------------------------------------------------------*/
3354 /* pBranchFind - find the pBranch in a pBranch chain that contains */
3356 /*-----------------------------------------------------------------*/
3357 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
3370 /*-----------------------------------------------------------------*/
3371 /* pCodeUnlink - Unlink the given pCode from its pCode chain. */
3372 /*-----------------------------------------------------------------*/
3373 static void pCodeUnlink(pCode *pc)
3378 if(!pc->prev || !pc->next) {
3379 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
3383 /* first remove the pCode from the chain */
3384 pc->prev->next = pc->next;
3385 pc->next->prev = pc->prev;
3387 /* Now for the hard part... */
3389 /* Remove the branches */
3393 pc1 = pb1->pc; /* Get the pCode that branches to the
3394 * one we're unlinking */
3396 /* search for the link back to this pCode (the one we're
3398 if(pb2 = pBranchFind(pc1->to,pc)) {
3399 pb2->pc = pc->to->pc; // make the replacement
3401 /* if the pCode we're unlinking contains multiple 'to'
3402 * branches (e.g. this a skip instruction) then we need
3403 * to copy these extra branches to the chain. */
3405 pBranchAppend(pb2, pc->to->next);
3414 /*-----------------------------------------------------------------*/
3415 /*-----------------------------------------------------------------*/
3417 static void genericAnalyze(pCode *pc)
3427 // Go through the pCodes that are in pCode chain and link
3428 // them together through the pBranches. Note, the pCodes
3429 // are linked together as a contiguous stream like the
3430 // assembly source code lines. The linking here mimics this
3431 // except that comments are not linked in.
3433 pCode *npc = pc->next;
3435 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
3436 pBranchLink(pc,npc);
3441 /* reached the end of the pcode chain without finding
3442 * an instruction we could link to. */
3446 fprintf(stderr,"analyze PC_FLOW\n");
3450 fprintf(stderr,";A bad pCode is being used\n");
3456 /*-----------------------------------------------------------------*/
3457 /*-----------------------------------------------------------------*/
3458 int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
3462 if(pc->type == PC_LABEL) {
3463 if( ((pCodeLabel *)pc)->key == pcop_label->key)
3466 if(pc->type == PC_OPCODE) {
3467 pbr = PCI(pc)->label;
3469 if(pbr->pc->type == PC_LABEL) {
3470 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
3480 /*-----------------------------------------------------------------*/
3481 /*-----------------------------------------------------------------*/
3482 int checkLabel(pCode *pc)
3486 if(pc && isPCI(pc)) {
3487 pbr = PCI(pc)->label;
3489 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
3499 /*-----------------------------------------------------------------*/
3500 /* findLabelinpBlock - Search the pCode for a particular label */
3501 /*-----------------------------------------------------------------*/
3502 pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
3509 for(pc = pb->pcHead; pc; pc = pc->next)
3510 if(compareLabel(pc,pcop_label))
3516 /*-----------------------------------------------------------------*/
3517 /* findLabel - Search the pCode for a particular label */
3518 /*-----------------------------------------------------------------*/
3519 pCode * findLabel(pCodeOpLabel *pcop_label)
3527 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3528 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
3532 fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
3536 /*-----------------------------------------------------------------*/
3537 /* findNextpCode - given a pCode, find the next of type 'pct' */
3538 /* in the linked list */
3539 /*-----------------------------------------------------------------*/
3540 pCode * findNextpCode(pCode *pc, PC_TYPE pct)
3553 /*-----------------------------------------------------------------*/
3554 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
3555 /* in the linked list */
3556 /*-----------------------------------------------------------------*/
3557 pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
3561 if(pc->type == pct) {
3563 static unsigned int stop;
3565 stop++; // Place break point here
3576 /*-----------------------------------------------------------------*/
3577 /* findNextInstruction - given a pCode, find the next instruction */
3578 /* in the linked list */
3579 /*-----------------------------------------------------------------*/
3580 pCode * findNextInstruction(pCode *pci)
3585 if((pc->type == PC_OPCODE) || (pc->type == PC_WILD)) {
3587 static unsigned int stop;
3589 stop++; // Place break point here
3595 fprintf(stderr,"findNextInstruction: ");
3596 printpCode(stderr, pc);
3601 //fprintf(stderr,"Couldn't find instruction\n");
3605 /*-----------------------------------------------------------------*/
3606 /* findNextInstruction - given a pCode, find the next instruction */
3607 /* in the linked list */
3608 /*-----------------------------------------------------------------*/
3609 pCode * findPrevInstruction(pCode *pci)
3611 return findPrevpCode(pci, PC_OPCODE);
3614 /*-----------------------------------------------------------------*/
3615 /* findFunctionEnd - given a pCode find the end of the function */
3616 /* that contains it */
3617 /*-----------------------------------------------------------------*/
3618 pCode * findFunctionEnd(pCode *pc)
3622 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
3628 fprintf(stderr,"Couldn't find function end\n");
3633 /*-----------------------------------------------------------------*/
3634 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
3635 /* instruction with which it is associated. */
3636 /*-----------------------------------------------------------------*/
3637 static void AnalyzeLabel(pCode *pc)
3646 static void AnalyzeGOTO(pCode *pc)
3649 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
3653 static void AnalyzeSKIP(pCode *pc)
3656 pBranchLink(pc,findNextInstruction(pc->next));
3657 pBranchLink(pc,findNextInstruction(pc->next->next));
3661 static void AnalyzeRETURN(pCode *pc)
3664 // branch_link(pc,findFunctionEnd(pc->next));
3670 /*-----------------------------------------------------------------*/
3671 /*-----------------------------------------------------------------*/
3672 regs * getRegFromInstruction(pCode *pc)
3678 PCI(pc)->num_ops == 0 )
3681 switch(PCI(pc)->pcop->type) {
3684 return PCOR(PCI(pc)->pcop)->r;
3686 // return typeRegWithIdx (PCOR(PCI(pc)->pcop)->rIdx, REG_SFR, 0);
3690 //fprintf(stderr, "getRegFromInstruction - bit or temp\n");
3691 return PCOR(PCI(pc)->pcop)->r;
3694 if(PCOI(PCI(pc)->pcop)->r)
3695 return (PCOI(PCI(pc)->pcop)->r);
3697 //fprintf(stderr, "getRegFromInstruction - immediate\n");
3698 return dirregWithName(PCI(pc)->pcop->name);
3699 //return NULL; // PCOR(PCI(pc)->pcop)->r;
3702 return PCOR(PCI(pc)->pcop)->r;
3704 case PO_GPR_REGISTER:
3706 //fprintf(stderr, "getRegFromInstruction - dir\n");
3707 return PCOR(PCI(pc)->pcop)->r;
3709 //fprintf(stderr, "getRegFromInstruction - literal\n");
3713 //fprintf(stderr, "getRegFromInstruction - unknown reg type %d\n",PCI(pc)->pcop->type);
3714 //genericPrint(stderr, pc);
3722 /*-----------------------------------------------------------------*/
3723 /*-----------------------------------------------------------------*/
3725 void AnalyzepBlock(pBlock *pb)
3732 /* Find all of the registers used in this pBlock
3733 * by looking at each instruction and examining it's
3736 for(pc = pb->pcHead; pc; pc = pc->next) {
3738 /* Is this an instruction with operands? */
3739 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
3741 if((PCI(pc)->pcop->type == PO_GPR_TEMP)
3742 || ((PCI(pc)->pcop->type == PO_GPR_BIT) && PCOR(PCI(pc)->pcop)->r && (PCOR(PCI(pc)->pcop)->r->pc_type == PO_GPR_TEMP))) {
3744 /* Loop through all of the registers declared so far in
3745 this block and see if we find this one there */
3747 regs *r = setFirstItem(pb->tregisters);
3750 if((r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) && (r->type == PCOR(PCI(pc)->pcop)->r->type)) {
3751 PCOR(PCI(pc)->pcop)->r = r;
3754 r = setNextItem(pb->tregisters);
3758 /* register wasn't found */
3759 //r = Safe_calloc(1, sizeof(regs));
3760 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
3761 //addSet(&pb->tregisters, r);
3762 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
3763 //PCOR(PCI(pc)->pcop)->r = r;
3764 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
3766 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
3769 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
3770 if(PCOR(PCI(pc)->pcop)->r) {
3771 pic14_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
3772 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
3774 if(PCI(pc)->pcop->name)
3775 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
3777 fprintf(stderr,"ERROR: NULL register\n");
3786 /*-----------------------------------------------------------------*/
3788 /*-----------------------------------------------------------------*/
3789 void InsertpFlow(pCode *pc, pCode **pflow)
3792 PCFL(*pflow)->end = pc;
3794 if(!pc || !pc->next)
3797 *pflow = newpCodeFlow();
3798 pCodeInsertAfter(pc, *pflow);
3801 /*-----------------------------------------------------------------*/
3802 /* BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3803 /* the flow blocks. */
3805 * BuildFlow inserts pCodeFlow objects into the pCode chain at each
3806 * point the instruction flow changes.
3808 /*-----------------------------------------------------------------*/
3809 void BuildFlow(pBlock *pb)
3812 pCode *last_pci=NULL;
3819 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
3820 /* Insert a pCodeFlow object at the beginning of a pBlock */
3822 InsertpFlow(pb->pcHead, &pflow);
3824 //pflow = newpCodeFlow(); /* Create a new Flow object */
3825 //pflow->next = pb->pcHead; /* Make the current head the next object */
3826 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
3827 //pb->pcHead = pflow; /* Make the Flow object the head */
3830 for( pc = findNextInstruction(pb->pcHead);
3832 pc=findNextInstruction(pc)) {
3835 PCI(pc)->pcflow = PCFL(pflow);
3837 //fprintf(stderr," build: ");
3838 //pflow->print(stderr,pflow);
3840 if( PCI(pc)->isSkip) {
3842 /* The two instructions immediately following this one
3843 * mark the beginning of a new flow segment */
3845 while(pc && PCI(pc)->isSkip) {
3847 PCI(pc)->pcflow = PCFL(pflow);
3851 InsertpFlow(pc, &pflow);
3852 pc=findNextInstruction(pc->next);
3860 PCI(pc)->pcflow = PCFL(pflow);
3862 InsertpFlow(pc, &pflow);
3864 } else if ( PCI(pc)->isBranch && !checkLabel(findNextInstruction(pc->next))) {
3866 InsertpFlow(pc, &pflow);
3869 } else if (checkLabel(pc)) {
3871 /* This instruction marks the beginning of a
3872 * new flow segment */
3877 /* If the previous pCode is not a flow object, then
3878 * insert a new flow object. (This check prevents
3879 * two consecutive flow objects from being insert in
3880 * the case where a skip instruction preceeds an
3881 * instruction containing a label.) */
3883 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
3884 InsertpFlow(findPrevInstruction(pc->prev), &pflow);
3886 PCI(pc)->pcflow = PCFL(pflow);
3893 //fprintf (stderr,",end seq %d",GpcFlowSeq);
3895 PCFL(pflow)->end = pb->pcTail;
3898 /*-------------------------------------------------------------------*/
3899 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3900 /* the flow blocks. */
3902 * unBuildFlow removes pCodeFlow objects from a pCode chain
3904 /*-----------------------------------------------------------------*/
3905 void unBuildFlow(pBlock *pb)
3920 if(PCI(pc)->pcflow) {
3921 //free(PCI(pc)->pcflow);
3922 PCI(pc)->pcflow = NULL;
3925 } else if(isPCFL(pc) )
3934 /*-----------------------------------------------------------------*/
3935 /*-----------------------------------------------------------------*/
3936 void dumpCond(int cond)
3939 static char *pcc_str[] = {
3953 int ncond = sizeof(pcc_str) / sizeof(char *);
3956 fprintf(stderr, "0x%04X\n",cond);
3958 for(i=0,j=1; i<ncond; i++, j<<=1)
3960 fprintf(stderr, " %s\n",pcc_str[i]);
3964 /*-----------------------------------------------------------------*/
3965 /*-----------------------------------------------------------------*/
3966 void FlowStats(pCodeFlow *pcflow)
3974 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
3976 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
3979 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
3984 fprintf(stderr, " FlowStats inCond: ");
3985 dumpCond(pcflow->inCond);
3986 fprintf(stderr, " FlowStats outCond: ");
3987 dumpCond(pcflow->outCond);
3991 /*-----------------------------------------------------------------*
3992 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
3993 * if it affects the banking bits.
3995 * return: -1 == Banking bits are unaffected by this pCode.
3997 * return: > 0 == Banking bits are affected.
3999 * If the banking bits are affected, then the returned value describes
4000 * which bits are affected and how they're affected. The lower half
4001 * of the integer maps to the bits that are affected, the upper half
4002 * to whether they're set or cleared.
4004 *-----------------------------------------------------------------*/
4006 #define SET_BANK_BIT (1 << 16)
4007 #define CLR_BANK_BIT 0
4009 static int isBankInstruction(pCode *pc)
4017 if( ( (reg = getRegFromInstruction(pc)) != NULL) && isSTATUS_REG(reg)) {
4019 // Check to see if the register banks are changing
4020 if(PCI(pc)->isModReg) {
4022 pCodeOp *pcop = PCI(pc)->pcop;
4023 switch(PCI(pc)->op) {
4026 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4027 //fprintf(stderr, " isBankInstruction - Set RP0\n");
4028 return SET_BANK_BIT | PIC_RP0_BIT;
4031 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4032 //fprintf(stderr, " isBankInstruction - Set RP1\n");
4033 return CLR_BANK_BIT | PIC_RP0_BIT;
4038 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4039 //fprintf(stderr, " isBankInstruction - Clr RP0\n");
4040 return CLR_BANK_BIT | PIC_RP1_BIT;
4042 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4043 //fprintf(stderr, " isBankInstruction - Clr RP1\n");
4044 return CLR_BANK_BIT | PIC_RP1_BIT;
4048 //fprintf(stderr, " isBankInstruction - Status register is getting Modified by:\n");
4049 //genericPrint(stderr, pc);
4060 /*-----------------------------------------------------------------*/
4061 /*-----------------------------------------------------------------*/
4063 static void FillFlow(pCodeFlow *pcflow)
4071 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
4073 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
4076 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
4083 isBankInstruction(pc);
4085 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
4088 fprintf(stderr, " FillFlow - Bad end of flow\n");
4090 fprintf(stderr, " FillFlow - Ending flow with\n ");
4091 pc->print(stderr,pc);
4094 fprintf(stderr, " FillFlow inCond: ");
4095 dumpCond(pcflow->inCond);
4096 fprintf(stderr, " FillFlow outCond: ");
4097 dumpCond(pcflow->outCond);
4102 /*-----------------------------------------------------------------*/
4103 /*-----------------------------------------------------------------*/
4104 void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
4106 pCodeFlowLink *fromLink, *toLink;
4108 if(!from || !to || !to->pcflow || !from->pcflow)
4111 fromLink = newpCodeFlowLink(from->pcflow);
4112 toLink = newpCodeFlowLink(to->pcflow);
4114 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
4115 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
4119 /*-----------------------------------------------------------------*
4120 * void LinkFlow(pBlock *pb)
4122 * In BuildFlow, the PIC code has been partitioned into contiguous
4123 * non-branching segments. In LinkFlow, we determine the execution
4124 * order of these segments. For example, if one of the segments ends
4125 * with a skip, then we know that there are two possible flow segments
4126 * to which control may be passed.
4127 *-----------------------------------------------------------------*/
4128 void LinkFlow(pBlock *pb)
4134 //fprintf(stderr,"linkflow \n");
4136 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4138 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4141 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
4143 //fprintf(stderr," link: ");
4144 //pcflow->print(stderr,pcflow);
4146 //FillFlow(PCFL(pcflow));
4148 pc = PCFL(pcflow)->end;
4150 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
4151 if(isPCI_SKIP(pc)) {
4152 //fprintf(stderr, "ends with skip\n");
4153 //pc->print(stderr,pc);
4154 pct=findNextInstruction(pc->next);
4155 LinkFlow_pCode(PCI(pc),PCI(pct));
4156 pct=findNextInstruction(pct->next);
4157 LinkFlow_pCode(PCI(pc),PCI(pct));
4161 if(isPCI_BRANCH(pc)) {
4162 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
4164 //fprintf(stderr, "ends with branch\n ");
4165 //pc->print(stderr,pc);
4167 if(!(pcol && isPCOLAB(pcol))) {
4168 if((PCI(pc)->op != POC_RETLW) && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RETFIE) ) {
4169 pc->print(stderr,pc);
4170 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
4175 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
4176 LinkFlow_pCode(PCI(pc),PCI(pct));
4178 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
4179 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
4180 //fprintf(stderr,"newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
4186 //fprintf(stderr, "ends with non-branching instruction:\n");
4187 //pc->print(stderr,pc);
4189 LinkFlow_pCode(PCI(pc),PCI(findNextInstruction(pc->next)));
4195 //fprintf(stderr, "ends with unknown\n");
4196 //pc->print(stderr,pc);
4200 //fprintf(stderr, "ends with nothing: ERROR\n");
4204 /*-----------------------------------------------------------------*/
4205 /*-----------------------------------------------------------------*/
4207 /*-----------------------------------------------------------------*/
4208 /*-----------------------------------------------------------------*/
4209 int isPCinFlow(pCode *pc, pCode *pcflow)
4215 if(!isPCI(pc) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
4218 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
4224 /*-----------------------------------------------------------------*/
4225 /*-----------------------------------------------------------------*/
4227 static void BanksUsedFlow2(pCode *pcflow)
4236 if(!isPCFL(pcflow)) {
4237 fprintf(stderr, "BanksUsed - pcflow is not a flow object ");
4241 pc = findNextInstruction(pcflow->next);
4243 PCFL(pcflow)->lastBank = -1;
4245 while(isPCinFlow(pc,pcflow)) {
4247 int bank_selected = isBankInstruction(pc);
4249 //if(PCI(pc)->pcflow)
4250 //fprintf(stderr,"BanksUsedFlow2, looking at seq %d\n",PCI(pc)->pcflow->pc.seq);
4252 if(bank_selected > 0) {
4253 //fprintf(stderr,"BanksUsed - mucking with bank %d\n",bank_selected);
4255 // This instruction is modifying banking bits before accessing registers
4257 PCFL(pcflow)->firstBank = -1;
4259 if(PCFL(pcflow)->lastBank == -1)
4260 PCFL(pcflow)->lastBank = 0;
4262 bank = (1 << (bank_selected & (PIC_RP0_BIT | PIC_RP1_BIT)));
4263 if(bank_selected & SET_BANK_BIT)
4264 PCFL(pcflow)->lastBank |= bank;
4268 reg = getRegFromInstruction(pc);
4270 if(reg && !isREGinBank(reg, bank)) {
4271 int allbanks = REGallBanks(reg);
4273 PCFL(pcflow)->firstBank = allbanks;
4275 PCFL(pcflow)->lastBank = allbanks;
4282 pc = findNextInstruction(pc->next);
4285 // fprintf(stderr,"BanksUsedFlow2 flow seq=%3d, first bank = 0x%03x, Last bank 0x%03x\n",
4286 // pcflow->seq,PCFL(pcflow)->firstBank,PCFL(pcflow)->lastBank);
4289 /*-----------------------------------------------------------------*/
4290 /*-----------------------------------------------------------------*/
4292 static void BanksUsedFlow(pBlock *pb)
4297 //pb->pcHead->print(stderr, pb->pcHead);
4299 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4300 //pcflow->print(stderr,pcflow);
4302 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4304 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4306 BanksUsedFlow2(pcflow);
4312 /*-----------------------------------------------------------------*/
4313 /*-----------------------------------------------------------------*/
4314 static void pCodeInstructionInsertAfter(pCodeInstruction *pci, pCodeInstruction *new_pci)
4317 pCodeInsertAfter(pci->pc.prev, &new_pci->pc);
4319 /* Move the label, if there is one */
4322 new_pci->label = pci->label;
4326 /* Move the C code comment, if there is one */
4329 new_pci->cline = pci->cline;
4333 /* The new instruction has the same pcflow block */
4334 new_pci->pcflow = pci->pcflow;
4338 /*-----------------------------------------------------------------*/
4339 /*-----------------------------------------------------------------*/
4340 static void insertBankSwitch(pCodeInstruction *pci, int Set_Clear, int RP_BankBit)
4344 new_pc = newpCode((Set_Clear?POC_BSF:POC_BCF),popCopyGPR2Bit(PCOP(&pc_status),RP_BankBit));
4346 pCodeInstructionInsertAfter(pci, PCI(new_pc));
4349 /*-----------------------------------------------------------------*/
4350 /*-----------------------------------------------------------------*/
4351 static void insertBankSel(pCodeInstruction *pci, const char *name)
4355 pCodeOp *pcop = popCopyReg(PCOR(pci->pcop));
4356 pcop->type = PO_GPR_REGISTER; // Sometimes the type is set to legacy 8051 - so override it
4357 if (pcop->name == 0)
4358 pcop->name = strdup(name);
4359 new_pc = newpCode(POC_BANKSEL, pcop);
4361 pCodeInstructionInsertAfter(pci, PCI(new_pc));
4364 /*-----------------------------------------------------------------*/
4365 /* If the register is a fixed known addess then we can assign the */
4366 /* bank selection bits. Otherwise the linker is going to assign */
4367 /* the register location and thus has to set bank selection bits */
4368 /* through the banksel directive. */
4369 /* One critical assumption here is that within this C module all */
4370 /* the locally allocated registers are in the same udata sector. */
4371 /* Therefore banksel is only called for external registers or the */
4372 /* first time a local register is encountered. */
4373 /*-----------------------------------------------------------------*/
4374 static int LastRegIdx; /* If the previous register is the same one again then no need to change bank. */
4375 static int BankSelect(pCodeInstruction *pci, int cur_bank, regs *reg)
4378 int a = reg->alias>>7;
4380 return cur_bank; // This register is available in all banks
4381 } else if ((a&1)&&((cur_bank==0)||(cur_bank==1))) {
4382 return cur_bank; // This register is available in banks 0 & 1
4384 if (reg->address&0x80) {
4385 if ((cur_bank==1)||(cur_bank==3)) {
4386 return cur_bank; // This register is available in banks 1 & 3
4389 if ((cur_bank==0)||(cur_bank==1)) {
4390 return cur_bank; // This register is available in banks 0 & 2
4395 if (LastRegIdx == reg->rIdx) // If this is the same register as last time then it is in same bank
4397 LastRegIdx = reg->rIdx;
4400 bank = REG_BANK(reg);
4401 } else if (reg->isExtern) {
4402 bank = 'E'; // Unfixed extern registers are allocated by the linker therefore its bank is unknown
4404 bank = 'L'; // Unfixed local registers are allocated by the linker therefore its bank is unknown
4406 if ((cur_bank == 'L')&&(bank == 'L')) { // If current bank and new bank are both allocated locally by the linker, then assume it is in same bank.
4407 return 'L'; // Local registers are presumed to be in same linker assigned bank
4408 } else if ((bank == 'L')&&(cur_bank != 'L')) { // Reg is now local and linker to assign bank
4409 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4410 } else if (bank == 'E') { // Reg is now extern and linker to assign bank
4411 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4412 } else if ((cur_bank == -1)||(cur_bank == 'L')||(cur_bank == 'E')) { // Current bank unknown and new register bank is known then can set bank bits
4413 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4414 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4415 } else { // Current bank and new register banks known - can set bank bits
4416 switch((cur_bank^bank) & 3) {
4420 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4423 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4426 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4427 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4435 /*-----------------------------------------------------------------*/
4436 /* Check for bank selection pcodes instructions and modify */
4437 /* cur_bank to match. */
4438 /*-----------------------------------------------------------------*/
4439 static int IsBankChange(pCode *pc, regs *reg, int *cur_bank) {
4441 if (isSTATUS_REG(reg)) {
4443 if (PCI(pc)->op == POC_BCF) {
4444 int old_bank = *cur_bank;
4445 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4446 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4447 if (*cur_bank & ~(0x3))
4450 *cur_bank = *cur_bank&0x2;
4451 LastRegIdx = reg->rIdx;
4452 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4453 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4454 if (*cur_bank & ~(0x3))
4457 *cur_bank = *cur_bank&0x1;
4458 LastRegIdx = reg->rIdx;
4460 return old_bank != *cur_bank;
4463 if (PCI(pc)->op == POC_BSF) {
4464 int old_bank = *cur_bank;
4465 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4466 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4467 if (*cur_bank & ~(0x3))
4470 *cur_bank = (*cur_bank&0x2) | 0x1;
4471 LastRegIdx = reg->rIdx;
4472 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4473 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4474 if (*cur_bank & ~(0x3))
4477 *cur_bank = (*cur_bank&0x1) | 0x2;
4478 LastRegIdx = reg->rIdx;
4480 return old_bank != *cur_bank;
4483 } else if (PCI(pc)->op == POC_BANKSEL) {
4484 int old_bank = *cur_bank;
4485 *cur_bank = (PCOR(PCI(pc)->pcop)->r->isExtern) ? 'E' : 'L';
4486 LastRegIdx = reg->rIdx;
4487 return old_bank != *cur_bank;
4493 /*-----------------------------------------------------------------*/
4494 /* Set bank selection if necessary */
4495 /*-----------------------------------------------------------------*/
4496 static int DoBankSelect(pCode *pc, int cur_bank) {
4504 pCode *pcf = findFunction(get_op_from_instruction(PCI(pc)));
4505 if (pcf && isPCF(pcf)) {
4507 int rbank = 'U'; // Undetermined
4508 FixRegisterBanking(pcf->pb,cur_bank); // Ensure this block has had its banks selection done
4509 // Check all the returns to work out what bank is selected
4510 for (pcfr=pcf->pb->pcHead; pcfr; pcfr=pcfr->next) {
4512 if ((PCI(pcfr)->op==POC_RETURN) || (PCI(pcfr)->op==POC_RETLW)) {
4514 rbank = PCFL(pcfr)->lastBank;
4516 if (rbank != PCFL(pcfr)->lastBank)
4517 return -1; // Unknown bank - multiple returns with different banks
4522 return -1; // Unknown bank
4524 } else if (isPCOS(PCI(pc)->pcop) && PCOS(PCI(pc)->pcop)->isPublic) {
4525 /* Extern functions may use registers in different bank - must call banksel */
4526 return -1; /* Unknown bank */
4530 if ((isPCI(pc)) && (PCI(pc)->op == POC_BANKSEL)) {
4531 return -1; /* New bank unknown - linkers choice. */
4534 reg = getRegFromInstruction(pc);
4537 if (IsBankChange(pc,reg,&cur_bank))
4540 if (!isPCI_LIT(pc)) {
4542 /* Examine the instruction before this one to make sure it is
4543 * not a skip type instruction */
4544 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
4546 if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
4547 cur_bank = BankSelect(PCI(pc),cur_bank,reg);
4549 cur_bank = BankSelect(PCI(pcprev),cur_bank,reg);
4551 if (!PCI(pc)->pcflow)
4552 fprintf(stderr,"PCI ID=%d missing flow pointer ???\n",pc->id);
4554 PCI(pc)->pcflow->lastBank = cur_bank; /* Maintain pCodeFlow lastBank state */
4560 /*-----------------------------------------------------------------*/
4561 /*-----------------------------------------------------------------*/
4563 static void FixRegisterBankingInFlow(pCodeFlow *pcfl, int cur_bank)
4571 pc = findNextInstruction(pcfl->pc.next);
4573 while(isPCinFlow(pc,PCODE(pcfl))) {
4575 cur_bank = DoBankSelect(pc,cur_bank);
4577 pc = findNextInstruction(pc->next);
4581 if(pcprev && cur_bank) {
4582 // Set bank state to unknown at the end of each flow block
4588 /*-----------------------------------------------------------------*/
4589 /*int compareBankFlow - compare the banking requirements between */
4591 /*-----------------------------------------------------------------*/
4593 int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
4596 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
4599 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
4602 if(pcflow->firstBank == -1)
4606 if(pcflowLink->pcflow->firstBank == -1) {
4607 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
4608 pcflowLink->pcflow->to :
4609 pcflowLink->pcflow->from);
4610 return compareBankFlow(pcflow, pctl, toORfrom);
4614 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
4617 pcflowLink->bank_conflict++;
4618 pcflowLink->pcflow->FromConflicts++;
4619 pcflow->ToConflicts++;
4622 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
4625 pcflowLink->bank_conflict++;
4626 pcflowLink->pcflow->ToConflicts++;
4627 pcflow->FromConflicts++;
4631 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
4632 pcflowLink->pcflow->pc.seq,
4633 pcflowLink->pcflow->FromConflicts,
4634 pcflowLink->pcflow->ToConflicts);
4640 /*-----------------------------------------------------------------*/
4641 /*-----------------------------------------------------------------*/
4643 void FixBankFlow(pBlock *pb)
4647 pCodeFlowLink *pcfl;
4649 pCode *pcflow_max_To=NULL;
4650 pCode *pcflow_max_From=NULL;
4651 int max_ToConflicts=0;
4652 int max_FromConflicts=0;
4654 /fprintf(stderr,"Fix Bank flow \n");
4655 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4659 First loop through all of the flow objects in this pcode block
4660 and fix the ones that have banking conflicts between the
4664 //fprintf(stderr, "FixBankFlow - Phase 1\n");
4666 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4668 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4670 if(!isPCFL(pcflow)) {
4671 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4675 if(PCFL(pcflow)->firstBank != PCFL(pcflow)->lastBank &&
4676 PCFL(pcflow)->firstBank >= 0 &&
4677 PCFL(pcflow)->lastBank >= 0 ) {
4679 int cur_bank = (PCFL(pcflow)->firstBank < PCFL(pcflow)->lastBank) ?
4680 PCFL(pcflow)->firstBank : PCFL(pcflow)->lastBank;
4682 FixRegisterBankingInFlow(PCFL(pcflow),cur_bank);
4683 BanksUsedFlow2(pcflow);
4688 //fprintf(stderr, "FixBankFlow - Phase 2\n");
4690 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4692 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4697 if(!isPCFL(pcflow)) {
4698 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4702 PCFL(pcflow)->FromConflicts = 0;
4703 PCFL(pcflow)->ToConflicts = 0;
4708 //fprintf(stderr, " FixBankFlow flow seq %d\n",pcflow->seq);
4709 pcfl = setFirstItem(PCFL(pcflow)->from);
4712 pc = PCODE(pcfl->pcflow);
4715 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4716 pc->print(stderr,pc);
4719 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 0);
4722 pcfl=setNextItem(PCFL(pcflow)->from);
4725 if((nFlows >= 2) && nConflicts && (PCFL(pcflow)->firstBank>0)) {
4726 //fprintf(stderr, " From conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4728 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4729 BanksUsedFlow2(pcflow);
4731 continue; / * Don't need to check the flow from here - it's already been fixed * /
4738 pcfl = setFirstItem(PCFL(pcflow)->to);
4741 pc = PCODE(pcfl->pcflow);
4743 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4744 pc->print(stderr,pc);
4747 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 1);
4750 pcfl=setNextItem(PCFL(pcflow)->to);
4753 if((nFlows >= 2) && nConflicts &&(nConflicts != nFlows) && (PCFL(pcflow)->lastBank>0)) {
4754 //fprintf(stderr, " To conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4756 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4757 BanksUsedFlow2(pcflow);
4762 Loop through the flow objects again and find the ones with the
4766 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4768 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4770 if(PCFL(pcflow)->ToConflicts > max_ToConflicts)
4771 pcflow_max_To = pcflow;
4773 if(PCFL(pcflow)->FromConflicts > max_FromConflicts)
4774 pcflow_max_From = pcflow;
4778 fprintf(stderr,"compare flow Max To conflicts: seq %d conflicts %d\n",
4779 PCFL(pcflow_max_To)->pc.seq,
4780 PCFL(pcflow_max_To)->ToConflicts);
4783 fprintf(stderr,"compare flow Max From conflicts: seq %d conflicts %d\n",
4784 PCFL(pcflow_max_From)->pc.seq,
4785 PCFL(pcflow_max_From)->FromConflicts);
4790 /*-----------------------------------------------------------------*/
4791 /*-----------------------------------------------------------------*/
4792 void DumpFlow(pBlock *pb)
4796 pCodeFlowLink *pcfl;
4799 fprintf(stderr,"Dump flow \n");
4800 pb->pcHead->print(stderr, pb->pcHead);
4802 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4803 pcflow->print(stderr,pcflow);
4805 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4807 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4809 if(!isPCFL(pcflow)) {
4810 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
4813 fprintf(stderr,"dumping: ");
4814 pcflow->print(stderr,pcflow);
4815 FlowStats(PCFL(pcflow));
4817 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4819 pc = PCODE(pcfl->pcflow);
4821 fprintf(stderr, " from seq %d:\n",pc->seq);
4823 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
4824 pc->print(stderr,pc);
4829 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4831 pc = PCODE(pcfl->pcflow);
4833 fprintf(stderr, " to seq %d:\n",pc->seq);
4835 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4836 pc->print(stderr,pc);
4845 /*-----------------------------------------------------------------*/
4846 /*-----------------------------------------------------------------*/
4847 int OptimizepBlock(pBlock *pb)
4852 if(!pb || !peepOptimizing)
4855 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
4857 for(pc = pb->pcHead; pc; pc = pc->next)
4858 matches += pCodePeepMatchRule(pc);
4861 pc = findNextInstruction(pb->pcHead);
4869 if(pCodePeepMatchRule(pc)) {
4874 pc = findNextInstruction(pcprev->next);
4876 pc = findNextInstruction(pb->pcHead);
4878 pc = findNextInstruction(pc->next);
4882 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
4887 /*-----------------------------------------------------------------*/
4888 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
4889 /*-----------------------------------------------------------------*/
4890 pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
4894 for(pc = pcs; pc; pc = pc->next) {
4896 if((pc->type == PC_OPCODE) &&
4898 (PCI(pc)->pcop->type == PO_LABEL) &&
4899 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
4907 /*-----------------------------------------------------------------*/
4908 /*-----------------------------------------------------------------*/
4909 void exchangeLabels(pCodeLabel *pcl, pCode *pc)
4916 (PCI(pc)->pcop->type == PO_LABEL)) {
4918 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
4920 //fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
4922 free(pcol->pcop.name);
4924 /* If the key is negative, then we (probably) have a label to
4925 * a function and the name is already defined */
4928 sprintf(s=buffer,"_%05d_DS_",pcl->key);
4932 //sprintf(buffer,"_%05d_DS_",pcl->key);
4934 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
4936 pcol->pcop.name = Safe_strdup(s);
4937 pcol->key = pcl->key;
4938 //pc->print(stderr,pc);
4945 /*-----------------------------------------------------------------*/
4946 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
4947 /* pCode chain if they're not used. */
4948 /*-----------------------------------------------------------------*/
4949 void pBlockRemoveUnusedLabels(pBlock *pb)
4951 pCode *pc; pCodeLabel *pcl;
4956 for(pc = pb->pcHead; (pc=findNextInstruction(pc->next)) != NULL; ) {
4958 pBranch *pbr = PCI(pc)->label;
4959 if(pbr && pbr->next) {
4960 pCode *pcd = pb->pcHead;
4962 //fprintf(stderr, "multiple labels\n");
4963 //pc->print(stderr,pc);
4968 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
4969 //fprintf(stderr,"Used by:\n");
4970 //pcd->print(stderr,pcd);
4972 exchangeLabels(PCL(pbr->pc),pcd);
4981 for(pc = pb->pcHead; pc; pc = pc->next) {
4983 if(isPCL(pc)) // Label pcode
4985 else if (isPCI(pc) && PCI(pc)->label) // pcode instruction with a label
4986 pcl = PCL(PCI(pc)->label->pc);
4989 //fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
4991 /* This pCode is a label, so search the pBlock to see if anyone
4994 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))) {
4995 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
4996 /* Couldn't find an instruction that refers to this label
4997 * So, unlink the pCode label from it's pCode chain
4998 * and destroy the label */
4999 //fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
5001 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
5002 if(pc->type == PC_LABEL) {
5004 pCodeLabelDestruct(pc);
5006 unlinkpCodeFromBranch(pc, PCODE(pcl));
5007 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
5018 /*-----------------------------------------------------------------*/
5019 /* pBlockMergeLabels - remove the pCode labels from the pCode */
5020 /* chain and put them into pBranches that are */
5021 /* associated with the appropriate pCode */
5023 /*-----------------------------------------------------------------*/
5024 void pBlockMergeLabels(pBlock *pb)
5027 pCode *pc, *pcnext=NULL;
5032 /* First, Try to remove any unused labels */
5033 //pBlockRemoveUnusedLabels(pb);
5035 /* Now loop through the pBlock and merge the labels with the opcodes */
5038 // for(pc = pb->pcHead; pc; pc = pc->next) {
5041 pCode *pcn = pc->next;
5043 if(pc->type == PC_LABEL) {
5045 //fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
5046 //fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
5047 if((pcnext = findNextInstruction(pc) )) {
5049 // Unlink the pCode label from it's pCode chain
5052 //fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
5053 // And link it into the instruction's pBranch labels. (Note, since
5054 // it's possible to have multiple labels associated with one instruction
5055 // we must provide a means to accomodate the additional labels. Thus
5056 // the labels are placed into the singly-linked list "label" as
5057 // opposed to being a single member of the pCodeInstruction.)
5059 //_ALLOC(pbr,sizeof(pBranch));
5060 pbr = Safe_calloc(1,sizeof(pBranch));
5064 PCI(pcnext)->label = pBranchAppend(PCI(pcnext)->label,pbr);
5067 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
5069 } else if(pc->type == PC_CSOURCE) {
5071 /* merge the source line symbolic info into the next instruction */
5072 if((pcnext = findNextInstruction(pc) )) {
5074 // Unlink the pCode label from it's pCode chain
5076 PCI(pcnext)->cline = PCCS(pc);
5077 //fprintf(stderr, "merging CSRC\n");
5078 //genericPrint(stderr,pcnext);
5084 pBlockRemoveUnusedLabels(pb);
5088 /*-----------------------------------------------------------------*/
5089 /*-----------------------------------------------------------------*/
5090 int OptimizepCode(char dbName)
5092 #define MAX_PASSES 4
5101 DFPRINTF((stderr," Optimizing pCode\n"));
5105 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5106 if('*' == dbName || getpBlock_dbName(pb) == dbName)
5107 matches += OptimizepBlock(pb);
5110 while(matches && ++passes < MAX_PASSES);
5115 /*-----------------------------------------------------------------*/
5116 /* popCopyGPR2Bit - copy a pcode operator */
5117 /*-----------------------------------------------------------------*/
5119 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval)
5123 pcop = newpCodeOpBit(pc->name, bitval, 0);
5125 if( !( (pcop->type == PO_LABEL) ||
5126 (pcop->type == PO_LITERAL) ||
5127 (pcop->type == PO_STR) ))
5128 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
5134 /*-----------------------------------------------------------------*/
5135 /*-----------------------------------------------------------------*/
5136 static void FixRegisterBanking(pBlock *pb,int cur_bank)
5139 int firstBank = 'U';
5144 for (pc=pb->pcHead; pc; pc=pc->next) {
5146 firstBank = PCFL(pc)->firstBank;
5150 if (firstBank != 'U') {
5151 /* This block has already been done */
5152 if (firstBank != cur_bank) {
5153 /* This block has started with a different bank - must adjust it */
5154 if ((firstBank != -1)&&(firstBank != 'E')) { /* The first bank start off unknown or extern then need not worry as banksel will be called */
5157 regs *reg = getRegFromInstruction(pc);
5159 DoBankSelect(pc,cur_bank);
5169 /* loop through all of the pCodes within this pblock setting the bank selection, ignoring any branching */
5172 for (pc=pb->pcHead; pc; pc=pc->next) {
5174 PCFL(pc)->firstBank = cur_bank;
5177 cur_bank = DoBankSelect(pc,cur_bank);
5180 /* Trace through branches and set the bank selection as required. */
5183 for (pc=pb->pcHead; pc; pc=pc->next) {
5185 PCFL(pc)->firstBank = cur_bank;
5189 if (PCI(pc)->op == POC_GOTO) {
5190 int lastRegIdx = LastRegIdx;
5192 /* Trace through branch */
5193 pCode *pcl = findLabel(PCOLAB(PCI(pcb)->pcop));
5196 regs *reg = getRegFromInstruction(pcl);
5198 int bankUnknown = -1;
5199 if (IsBankChange(pcl,reg,&bankUnknown)) /* Look for any bank change */
5201 if (cur_bank != DoBankSelect(pcl,cur_bank)) /* Set bank selection if necessary */
5207 LastRegIdx = lastRegIdx;
5209 /* Keep track out current bank */
5210 regs *reg = getRegFromInstruction(pc);
5212 IsBankChange(pc,reg,&cur_bank);
5219 /*-----------------------------------------------------------------*/
5220 /*-----------------------------------------------------------------*/
5221 void pBlockDestruct(pBlock *pb)
5232 /*-----------------------------------------------------------------*/
5233 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
5234 /* name dbName and combine them */
5235 /* into one block */
5236 /*-----------------------------------------------------------------*/
5237 void mergepBlocks(char dbName)
5240 pBlock *pb, *pbmerged = NULL,*pbn;
5242 pb = the_pFile->pbHead;
5244 //fprintf(stderr," merging blocks named %c\n",dbName);
5248 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
5249 if( getpBlock_dbName(pb) == dbName) {
5251 //fprintf(stderr," merged block %c\n",dbName);
5256 addpCode2pBlock(pbmerged, pb->pcHead);
5257 /* addpCode2pBlock doesn't handle the tail: */
5258 pbmerged->pcTail = pb->pcTail;
5260 pb->prev->next = pbn;
5262 pbn->prev = pb->prev;
5267 //printpBlock(stderr, pbmerged);
5274 /*-----------------------------------------------------------------*/
5275 /* AnalyzeFlow - Examine the flow of the code and optimize */
5277 /* level 0 == minimal optimization */
5278 /* optimize registers that are used only by two instructions */
5279 /* level 1 == maximal optimization */
5280 /* optimize by looking at pairs of instructions that use the */
5282 /*-----------------------------------------------------------------*/
5284 void AnalyzeFlow(int level)
5286 static int times_called=0;
5294 /* if this is not the first time this function has been called,
5295 then clean up old flow information */
5296 if(times_called++) {
5297 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5300 RegsUnMapLiveRanges();
5306 /* Phase 2 - Flow Analysis - Register Banking
5308 * In this phase, the individual flow blocks are examined
5309 * and register banking is fixed.
5312 //for(pb = the_pFile->pbHead; pb; pb = pb->next)
5313 //FixRegisterBanking(pb);
5315 /* Phase 2 - Flow Analysis
5317 * In this phase, the pCode is partition into pCodeFlow
5318 * blocks. The flow blocks mark the points where a continuous
5319 * stream of instructions changes flow (e.g. because of
5320 * a call or goto or whatever).
5323 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5327 /* Phase 2 - Flow Analysis - linking flow blocks
5329 * In this phase, the individual flow blocks are examined
5330 * to determine their order of excution.
5333 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5336 /* Phase 3 - Flow Analysis - Flow Tree
5338 * In this phase, the individual flow blocks are examined
5339 * to determine their order of excution.
5342 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5346 /* Phase x - Flow Analysis - Used Banks
5348 * In this phase, the individual flow blocks are examined
5349 * to determine the Register Banks they use
5352 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5356 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5357 pCodeRegMapLiveRanges(pb);
5359 RemoveUnusedRegisters();
5361 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5362 pCodeRegOptimizeRegUsage(level);
5368 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5373 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5375 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5376 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5377 pcflow = pcflow->next) {
5379 FillFlow(PCFL(pcflow));
5384 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5386 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5387 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5388 pcflow = pcflow->next) {
5390 FlowStats(PCFL(pcflow));
5396 /*-----------------------------------------------------------------*/
5397 /* AnalyzeBanking - Called after the memory addresses have been */
5398 /* assigned to the registers. */
5400 /*-----------------------------------------------------------------*/
5402 void AnalyzeBanking(void)
5406 if(!picIsInitialized()) {
5407 fprintf(stderr,"Temporary ERROR: at the moment you have to use\n");
5408 fprintf(stderr,"an include file create by inc2h.pl. See SDCC source:\n");
5409 fprintf(stderr,"support/scripts/inc2h.pl\n");
5410 fprintf(stderr,"this is a nuisance bug that will be fixed shortly\n");
5415 /* Phase x - Flow Analysis - Used Banks
5417 * In this phase, the individual flow blocks are examined
5418 * to determine the Register Banks they use
5424 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5425 // BanksUsedFlow(pb);
5426 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5427 FixRegisterBanking(pb,-1); // cur_bank is unknown
5431 /*-----------------------------------------------------------------*/
5432 /*-----------------------------------------------------------------*/
5433 DEFSETFUNC (resetrIdx)
5435 if (!((regs *)item)->isFixed)
5436 ((regs *)item)->rIdx = 0;
5441 /*-----------------------------------------------------------------*/
5442 /* InitRegReuse - Initialises variables for code analyzer */
5443 /*-----------------------------------------------------------------*/
5445 void InitReuseReg(void)
5447 /* Find end of statically allocated variables for start idx */
5448 unsigned maxIdx = 0x20; /* Start from begining of GPR. Note may not be 0x20 on some PICs */
5450 for (r = setFirstItem(dynDirectRegs); r; r = setNextItem(dynDirectRegs)) {
5451 if (r->type != REG_SFR) {
5452 maxIdx += r->size; /* Increment for all statically allocated variables */
5456 applyToSet(dynAllocRegs,resetrIdx); /* Reset all rIdx to zero. */
5459 /*-----------------------------------------------------------------*/
5460 /*-----------------------------------------------------------------*/
5461 static unsigned register_reassign(pBlock *pb, unsigned idx)
5465 /* check recursion */
5466 pc = setFirstItem(pb->function_entries);
5472 DFPRINTF((stderr," reassigning registers for function \"%s\"\n",PCF(pc)->fname));
5474 if (pb->tregisters) {
5476 for (r = setFirstItem(pb->tregisters); r; r = setNextItem(pb->tregisters)) {
5477 if (r->type == REG_GPR) {
5479 if (r->rIdx < (int)idx) {
5482 if (peakIdx < idx) peakIdx = idx;
5483 sprintf(s,"r0x%02X", r->rIdx);
5484 DFPRINTF((stderr," reassigning register \"%s\" to \"%s\"\n",r->name,s));
5486 r->name = Safe_strdup(s);
5492 for(pc = setFirstItem(pb->function_calls); pc; pc = setNextItem(pb->function_calls)) {
5494 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5495 char *dest = get_op_from_instruction(PCI(pc));
5497 pCode *pcn = findFunction(dest);
5499 register_reassign(pcn->pb,idx);
5508 /*------------------------------------------------------------------*/
5509 /* ReuseReg were call tree permits */
5511 /* Re-allocate the GPR for optimum reuse for a given pblock */
5512 /* eg if a function m() calls function f1() and f2(), where f1 */
5513 /* allocates a local variable vf1 and f2 allocates a local */
5514 /* variable vf2. Then providing f1 and f2 do not call each other */
5515 /* they may share the same general purpose registers for vf1 and */
5517 /* This is done by first setting the the regs rIdx to start after */
5518 /* all the global variables, then walking through the call tree */
5519 /* renaming the registers to match their new idx and incrementng */
5520 /* it as it goes. If a function has already been called it will */
5521 /* only rename the registers if it has already used up those */
5522 /* registers ie rIdx of the function's registers is lower than the */
5523 /* current rIdx. That way the register will not be reused while */
5524 /* still being used by an eariler function call. */
5526 /* Note for this to work the functions need to be declared static. */
5528 /*------------------------------------------------------------------*/
5533 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5534 /* Non static functions can be called from other modules so their registers must reassign */
5535 if (pb->function_entries&&(PCF(setFirstItem(pb->function_entries))->isPublic||!pb->visited))
5536 register_reassign(pb,peakIdx);
5540 /*-----------------------------------------------------------------*/
5541 /* buildCallTree - look at the flow and extract all of the calls */
5543 /*-----------------------------------------------------------------*/
5545 void buildCallTree(void )
5554 /* Now build the call tree.
5555 First we examine all of the pCodes for functions.
5556 Keep in mind that the function boundaries coincide
5557 with pBlock boundaries.
5559 The algorithm goes something like this:
5560 We have two nested loops. The outer loop iterates
5561 through all of the pBlocks/functions. The inner
5562 loop iterates through all of the pCodes for
5563 a given pBlock. When we begin iterating through
5564 a pBlock, the variable pc_fstart, pCode of the start
5565 of a function, is cleared. We then search for pCodes
5566 of type PC_FUNCTION. When one is encountered, we
5567 initialize pc_fstart to this and at the same time
5568 associate a new pBranch object that signifies a
5569 branch entry. If a return is found, then this signifies
5570 a function exit point. We'll link the pCodes of these
5571 returns to the matching pc_fstart.
5573 When we're done, a doubly linked list of pBranches
5574 will exist. The head of this list is stored in
5575 `the_pFile', which is the meta structure for all
5576 of the pCode. Look at the printCallTree function
5577 on how the pBranches are linked together.
5580 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5581 pCode *pc_fstart=NULL;
5582 for(pc = pb->pcHead; pc; pc = pc->next) {
5584 pCodeFunction *pcf = PCF(pc);
5587 if(STRCASECMP(pcf->fname, "_main") == 0) {
5588 //fprintf(stderr," found main \n");
5589 pb->cmemmap = NULL; /* FIXME do we need to free ? */
5593 pbr = Safe_calloc(1,sizeof(pBranch));
5594 pbr->pc = pc_fstart = pc;
5597 the_pFile->functions = pBranchAppend(the_pFile->functions,pbr);
5599 // Here's a better way of doing the same:
5600 addSet(&pb->function_entries, pc);
5603 // Found an exit point in a function, e.g. return
5604 // (Note, there may be more than one return per function)
5606 pBranchLink(PCF(pc_fstart), pcf);
5608 addSet(&pb->function_exits, pc);
5610 } else if(isCALL(pc)) {
5611 addSet(&pb->function_calls,pc);
5617 /*-----------------------------------------------------------------*/
5618 /* AnalyzepCode - parse the pCode that has been generated and form */
5619 /* all of the logical connections. */
5621 /* Essentially what's done here is that the pCode flow is */
5623 /*-----------------------------------------------------------------*/
5625 void AnalyzepCode(char dbName)
5636 /* Phase 1 - Register allocation and peep hole optimization
5638 * The first part of the analysis is to determine the registers
5639 * that are used in the pCode. Once that is done, the peep rules
5640 * are applied to the code. We continue to loop until no more
5641 * peep rule optimizations are found (or until we exceed the
5642 * MAX_PASSES threshold).
5644 * When done, the required registers will be determined.
5650 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
5652 /* First, merge the labels with the instructions */
5653 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5654 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
5656 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
5657 pBlockMergeLabels(pb);
5660 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName));
5664 changes = OptimizepCode(dbName);
5666 } while(changes && (i++ < MAX_PASSES));
5671 /*-----------------------------------------------------------------*/
5672 /* ispCodeFunction - returns true if *pc is the pCode of a */
5674 /*-----------------------------------------------------------------*/
5675 bool ispCodeFunction(pCode *pc)
5678 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
5684 /*-----------------------------------------------------------------*/
5685 /* findFunction - Search for a function by name (given the name) */
5686 /* in the set of all functions that are in a pBlock */
5687 /* (note - I expect this to change because I'm planning to limit */
5688 /* pBlock's to just one function declaration */
5689 /*-----------------------------------------------------------------*/
5690 pCode *findFunction(char *fname)
5697 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5699 pc = setFirstItem(pb->function_entries);
5702 if((pc->type == PC_FUNCTION) &&
5704 (strcmp(fname, PCF(pc)->fname)==0))
5707 pc = setNextItem(pb->function_entries);
5715 void MarkUsedRegisters(set *regset)
5720 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
5721 r2 = pic14_regWithIdx(r1->rIdx);
5729 void pBlockStats(FILE *of, pBlock *pb)
5735 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
5737 // for now just print the first element of each set
5738 pc = setFirstItem(pb->function_entries);
5740 fprintf(of,";entry: ");
5743 pc = setFirstItem(pb->function_exits);
5745 fprintf(of,";has an exit\n");
5749 pc = setFirstItem(pb->function_calls);
5751 fprintf(of,";functions called:\n");
5754 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5755 fprintf(of,"; %s\n",get_op_from_instruction(PCI(pc)));
5757 pc = setNextItem(pb->function_calls);
5761 r = setFirstItem(pb->tregisters);
5763 int n = elementsInSet(pb->tregisters);
5765 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
5768 fprintf(of,"; %s\n",r->name);
5769 r = setNextItem(pb->tregisters);
5774 /*-----------------------------------------------------------------*/
5775 /*-----------------------------------------------------------------*/
5777 static void sequencepCode(void)
5783 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5785 pb->seq = GpCodeSequenceNumber+1;
5787 for( pc = pb->pcHead; pc; pc = pc->next)
5788 pc->seq = ++GpCodeSequenceNumber;
5794 /*-----------------------------------------------------------------*/
5795 /*-----------------------------------------------------------------*/
5797 set *register_usage(pBlock *pb)
5800 set *registers=NULL;
5801 set *registersInCallPath = NULL;
5803 / * check recursion * /
5805 pc = setFirstItem(pb->function_entries);
5812 if(pc->type != PC_FUNCTION)
5813 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
5815 pc = setFirstItem(pb->function_calls);
5816 for( ; pc; pc = setNextItem(pb->function_calls)) {
5818 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5819 char *dest = get_op_from_instruction(PCI(pc));
5821 pcn = findFunction(dest);
5823 registersInCallPath = register_usage(pcn->pb);
5825 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5830 pBlockStats(stderr,pb); // debug
5833 // Mark the registers in this block as used.
5835 MarkUsedRegisters(pb->tregisters);
5836 if(registersInCallPath) {
5837 / * registers were used in the functions this pBlock has called * /
5838 / * so now, we need to see if these collide with the ones we are * /
5841 regs *r1,*r2, *newreg;
5843 DFPRINTF((stderr,"comparing registers\n"));
5845 r1 = setFirstItem(registersInCallPath);
5847 if (r1->type != REG_STK) {
5848 r2 = setFirstItem(pb->tregisters);
5850 while(r2 && (r2->type != REG_STK)) {
5852 if(r2->rIdx == r1->rIdx) {
5853 newreg = pic14_findFreeReg(REG_GPR);
5857 DFPRINTF((stderr,"Bummer, no more registers.\n"));
5861 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
5862 r1->rIdx, newreg->rIdx));
5863 r2->rIdx = newreg->rIdx;
5865 r2->name = Safe_strdup(newreg->name);
5869 newreg->wasUsed = 1;
5871 r2 = setNextItem(pb->tregisters);
5875 r1 = setNextItem(registersInCallPath);
5878 / * Collisions have been resolved. Now free the registers in the call path * /
5879 r1 = setFirstItem(registersInCallPath);
5881 newreg = pic14_regWithIdx(r1->rIdx);
5882 if (newreg) newreg->isFree = 1;
5883 r1 = setNextItem(registersInCallPath);
5887 // MarkUsedRegisters(pb->registers);
5889 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
5892 DFPRINTF((stderr,"returning regs\n"));
5894 DFPRINTF((stderr,"not returning regs\n"));
5896 DFPRINTF((stderr,"pBlock after register optim.\n"));
5897 pBlockStats(stderr,pb); // debug
5904 /*-----------------------------------------------------------------*/
5905 /* printCallTree - writes the call tree to a file */
5907 /*-----------------------------------------------------------------*/
5908 void pct2(FILE *of,pBlock *pb,int indent)
5912 // set *registersInCallPath = NULL;
5918 return; //recursion ?
5920 pc = setFirstItem(pb->function_entries);
5927 for(i=0;i<indent;i++) // Indentation
5930 if(pc->type == PC_FUNCTION)
5931 fprintf(of,"%s\n",PCF(pc)->fname);
5936 pc = setFirstItem(pb->function_calls);
5937 for( ; pc; pc = setNextItem(pb->function_calls)) {
5939 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5940 char *dest = get_op_from_instruction(PCI(pc));
5942 pcn = findFunction(dest);
5944 pct2(of,pcn->pb,indent+1);
5946 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5954 /*-----------------------------------------------------------------*/
5955 /* printCallTree - writes the call tree to a file */
5957 /*-----------------------------------------------------------------*/
5959 void printCallTree(FILE *of)
5971 fprintf(of, "\npBlock statistics\n");
5972 for(pb = the_pFile->pbHead; pb; pb = pb->next )
5977 fprintf(of,"Call Tree\n");
5978 pbr = the_pFile->functions;
5982 if(!ispCodeFunction(pc))
5983 fprintf(of,"bug in call tree");
5986 fprintf(of,"Function: %s\n", PCF(pc)->fname);
5988 while(pc->next && !ispCodeFunction(pc->next)) {
5990 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
5991 fprintf(of,"\t%s\n",get_op_from_instruction(PCI(pc)));
5999 fprintf(of,"\n**************\n\na better call tree\n");
6000 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6005 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6006 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
6012 /*-----------------------------------------------------------------*/
6014 /*-----------------------------------------------------------------*/
6016 void InlineFunction(pBlock *pb)
6024 pc = setFirstItem(pb->function_calls);
6026 for( ; pc; pc = setNextItem(pb->function_calls)) {
6029 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6030 pCode *pcp = pc->prev;
6036 if(pcn && isPCF(pcn) && (PCF(pcn)->ncalled == 1) && !PCF(pcn)->isPublic && (pcp && (isPCI_BITSKIP(pcp)||!isPCI_SKIP(pcp)))) { /* Bit skips can be inverted other skips can not */
6038 InlineFunction(pcn->pb);
6041 At this point, *pc points to a CALL mnemonic, and
6042 *pcn points to the function that is being called.
6044 To in-line this call, we need to remove the CALL
6045 and RETURN(s), and link the function pCode in with
6052 /* Check if previous instruction was a bit skip */
6053 if (isPCI_BITSKIP(pcp)) {
6055 /* Invert skip instruction and add a goto */
6056 PCI(pcp)->op = (PCI(pcp)->op == POC_BTFSS) ? POC_BTFSC : POC_BTFSS;
6058 if(isPCL(pc_call->next)) { // Label pcode
6059 pcl = PCL(pc_call->next);
6060 } else if (isPCI(pc_call->next) && PCI(pc_call->next)->label) { // pcode instruction with a label
6061 pcl = PCL(PCI(pc_call->next)->label->pc);
6063 pcl = PCL(newpCodeLabel(NULL, newiTempLabel(NULL)->key+100));
6064 PCI(pc_call->next)->label->pc = (struct pCode*)pcl;
6066 pCodeInsertAfter(pcp, newpCode(POC_GOTO, newpCodeOp(pcl->label,PO_STR)));
6069 /* remove callee pBlock from the pBlock linked list */
6070 removepBlock(pcn->pb);
6078 /* Remove the Function pCode */
6079 pct = findNextInstruction(pcn->next);
6081 /* Link the function with the callee */
6082 if (pcp) pcp->next = pcn->next;
6083 pcn->next->prev = pcp;
6085 /* Convert the function name into a label */
6087 pbr = Safe_calloc(1,sizeof(pBranch));
6088 pbr->pc = newpCodeLabel(PCF(pcn)->fname, -1);
6090 PCI(pct)->label = pBranchAppend(PCI(pct)->label,pbr);
6091 PCI(pct)->label = pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
6093 /* turn all of the return's except the last into goto's */
6094 /* check case for 2 instruction pBlocks */
6095 pce = findNextInstruction(pcn->next);
6097 pCode *pce_next = findNextInstruction(pce->next);
6099 if(pce_next == NULL) {
6100 /* found the last return */
6101 pCode *pc_call_next = findNextInstruction(pc_call->next);
6103 //fprintf(stderr,"found last return\n");
6104 //pce->print(stderr,pce);
6105 pce->prev->next = pc_call->next;
6106 pc_call->next->prev = pce->prev;
6107 PCI(pc_call_next)->label = pBranchAppend(PCI(pc_call_next)->label,
6116 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6122 /*-----------------------------------------------------------------*/
6124 /*-----------------------------------------------------------------*/
6126 void InlinepCode(void)
6135 if(!functionInlining)
6138 /* Loop through all of the function definitions and count the
6139 * number of times each one is called */
6140 //fprintf(stderr,"inlining %d\n",__LINE__);
6142 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6144 pc = setFirstItem(pb->function_calls);
6146 for( ; pc; pc = setNextItem(pb->function_calls)) {
6149 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6150 if(pcn && isPCF(pcn)) {
6151 PCF(pcn)->ncalled++;
6154 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6159 //fprintf(stderr,"inlining %d\n",__LINE__);
6161 /* Now, Loop through the function definitions again, but this
6162 * time inline those functions that have only been called once. */
6164 InlineFunction(the_pFile->pbHead);
6165 //fprintf(stderr,"inlining %d\n",__LINE__);
6167 for(pb = the_pFile->pbHead; pb; pb = pb->next)