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, "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 = 1; /* 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 /* statistics (code size estimation) */
86 static unsigned int pcode_insns = 0;
87 static unsigned int pcode_doubles = 0;
90 unsigned maxIdx; /* This keeps track of the maximum register index for call tree register reuse */
91 unsigned peakIdx; /* This keeps track of the peak register index for call tree register reuse */
93 extern void RemoveUnusedRegisters(void);
94 extern void RegsUnMapLiveRanges(void);
95 extern void BuildFlowTree(pBlock *pb);
96 extern void pCodeRegOptimizeRegUsage(int level);
97 extern int picIsInitialized(void);
98 extern const char *pCodeOpType(pCodeOp *pcop);
100 /****************************************************************/
101 /* Forward declarations */
102 /****************************************************************/
104 void unlinkpCode(pCode *pc);
106 static void genericAnalyze(pCode *pc);
107 static void AnalyzeGOTO(pCode *pc);
108 static void AnalyzeSKIP(pCode *pc);
109 static void AnalyzeRETURN(pCode *pc);
112 static void genericDestruct(pCode *pc);
113 static void genericPrint(FILE *of,pCode *pc);
115 static void pCodePrintLabel(FILE *of, pCode *pc);
116 static void pCodePrintFunction(FILE *of, pCode *pc);
117 static void pCodeOpPrint(FILE *of, pCodeOp *pcop);
118 static char *get_op_from_instruction( pCodeInstruction *pcc);
119 char *get_op( pCodeOp *pcop,char *buff,size_t buf_size);
120 int pCodePeepMatchLine(pCodePeep *peepBlock, pCode *pcs, pCode *pcd);
121 int pCodePeepMatchRule(pCode *pc);
122 void pBlockStats(FILE *of, pBlock *pb);
123 pBlock *newpBlock(void);
124 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval);
125 void pCodeRegMapLiveRanges(pBlock *pb);
127 pBranch * pBranchAppend(pBranch *h, pBranch *n);
130 /****************************************************************/
131 /* PIC Instructions */
132 /****************************************************************/
134 pCodeInstruction pciADDWF = {
135 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
148 1,0, // dest, bit instruction
150 0, // literal operand
152 (PCC_W | PCC_REGISTER), // inCond
153 (PCC_REGISTER | PCC_Z) // outCond
156 pCodeInstruction pciADDFW = {
157 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
170 0,0, // dest, bit instruction
172 0, // literal operand
174 (PCC_W | PCC_REGISTER), // inCond
175 (PCC_W | PCC_Z) // outCond
178 pCodeInstruction pciADDLW = {
179 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
192 0,0, // dest, bit instruction
194 1, // literal operand
196 (PCC_W | PCC_LITERAL), // inCond
197 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
200 pCodeInstruction pciANDLW = {
201 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
214 0,0, // dest, bit instruction
216 1, // literal operand
218 (PCC_W | PCC_LITERAL), // inCond
219 (PCC_W | PCC_Z) // outCond
222 pCodeInstruction pciANDWF = {
223 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
236 1,0, // dest, bit instruction
238 0, // literal operand
240 (PCC_W | PCC_REGISTER), // inCond
241 (PCC_REGISTER | PCC_Z) // outCond
244 pCodeInstruction pciANDFW = {
245 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
258 0,0, // dest, bit instruction
260 0, // literal operand
262 (PCC_W | PCC_REGISTER), // inCond
263 (PCC_W | PCC_Z) // outCond
266 pCodeInstruction pciBCF = {
267 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
280 1,1, // dest, bit instruction
282 0, // literal operand
284 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
285 PCC_REGISTER // outCond
288 pCodeInstruction pciBSF = {
289 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
302 1,1, // dest, bit instruction
304 0, // literal operand
306 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
307 (PCC_REGISTER | PCC_EXAMINE_PCOP) // outCond
310 pCodeInstruction pciBTFSC = {
311 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
324 0,1, // dest, bit instruction
326 0, // literal operand
328 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
329 PCC_EXAMINE_PCOP // outCond
332 pCodeInstruction pciBTFSS = {
333 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
346 0,1, // dest, bit instruction
348 0, // literal operand
350 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
351 PCC_EXAMINE_PCOP // outCond
354 pCodeInstruction pciCALL = {
355 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
368 0,0, // dest, bit instruction
370 0, // literal operand
376 pCodeInstruction pciCOMF = {
377 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
390 1,0, // dest, bit instruction
392 0, // literal operand
394 PCC_REGISTER, // inCond
395 PCC_REGISTER // outCond
398 pCodeInstruction pciCOMFW = {
399 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
412 0,0, // dest, bit instruction
414 0, // literal operand
416 PCC_REGISTER, // inCond
420 pCodeInstruction pciCLRF = {
421 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
434 0,0, // dest, bit instruction
436 0, // literal operand
439 PCC_REGISTER // outCond
442 pCodeInstruction pciCLRW = {
443 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
456 0,0, // dest, bit instruction
458 0, // literal operand
464 pCodeInstruction pciCLRWDT = {
465 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
478 0,0, // dest, bit instruction
480 0, // literal operand
486 pCodeInstruction pciDECF = {
487 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
500 1,0, // dest, bit instruction
502 0, // literal operand
504 PCC_REGISTER, // inCond
505 PCC_REGISTER // outCond
508 pCodeInstruction pciDECFW = {
509 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
522 0,0, // dest, bit instruction
524 0, // literal operand
526 PCC_REGISTER, // inCond
530 pCodeInstruction pciDECFSZ = {
531 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
544 1,0, // dest, bit instruction
546 0, // literal operand
548 PCC_REGISTER, // inCond
549 PCC_REGISTER // outCond
552 pCodeInstruction pciDECFSZW = {
553 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
566 0,0, // dest, bit instruction
568 0, // literal operand
570 PCC_REGISTER, // inCond
574 pCodeInstruction pciGOTO = {
575 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
588 0,0, // dest, bit instruction
590 0, // literal operand
596 pCodeInstruction pciINCF = {
597 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
610 1,0, // dest, bit instruction
612 0, // literal operand
614 PCC_REGISTER, // inCond
615 PCC_REGISTER // outCond
618 pCodeInstruction pciINCFW = {
619 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
632 0,0, // dest, bit instruction
634 0, // literal operand
636 PCC_REGISTER, // inCond
640 pCodeInstruction pciINCFSZ = {
641 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
654 1,0, // dest, bit instruction
656 0, // literal operand
658 PCC_REGISTER, // inCond
659 PCC_REGISTER // outCond
662 pCodeInstruction pciINCFSZW = {
663 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
676 0,0, // dest, bit instruction
678 0, // literal operand
680 PCC_REGISTER, // inCond
684 pCodeInstruction pciIORWF = {
685 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
698 1,0, // dest, bit instruction
700 0, // literal operand
702 (PCC_W | PCC_REGISTER), // inCond
703 (PCC_REGISTER | PCC_Z) // outCond
706 pCodeInstruction pciIORFW = {
707 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
720 0,0, // dest, bit instruction
722 0, // literal operand
724 (PCC_W | PCC_REGISTER), // inCond
725 (PCC_W | PCC_Z) // outCond
728 pCodeInstruction pciIORLW = {
729 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
742 0,0, // dest, bit instruction
744 1, // literal operand
746 (PCC_W | PCC_LITERAL), // inCond
747 (PCC_W | PCC_Z) // outCond
750 pCodeInstruction pciMOVF = {
751 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
764 1,0, // dest, bit instruction
766 0, // literal operand
768 PCC_REGISTER, // inCond
772 pCodeInstruction pciMOVFW = {
773 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
786 0,0, // dest, bit instruction
788 0, // literal operand
790 PCC_REGISTER, // inCond
791 (PCC_W | PCC_Z) // outCond
794 pCodeInstruction pciMOVWF = {
795 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
808 0,0, // dest, bit instruction
810 0, // literal operand
813 PCC_REGISTER // outCond
816 pCodeInstruction pciMOVLW = {
817 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
829 0,0, // dest, bit instruction
831 1, // literal operand
833 (PCC_NONE | PCC_LITERAL), // inCond
837 pCodeInstruction pciNOP = {
838 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
850 0,0, // dest, bit instruction
852 0, // literal operand
858 pCodeInstruction pciRETFIE = {
859 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
872 0,0, // dest, bit instruction
874 0, // literal operand
877 PCC_NONE // outCond (not true... affects the GIE bit too)
880 pCodeInstruction pciRETLW = {
881 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
894 0,0, // dest, bit instruction
896 1, // literal operand
898 PCC_LITERAL, // inCond
902 pCodeInstruction pciRETURN = {
903 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
916 0,0, // dest, bit instruction
918 0, // literal operand
924 pCodeInstruction pciRLF = {
925 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
938 1,0, // dest, bit instruction
940 0, // literal operand
942 (PCC_C | PCC_REGISTER), // inCond
943 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
946 pCodeInstruction pciRLFW = {
947 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
960 0,0, // dest, bit instruction
962 0, // literal operand
964 (PCC_C | PCC_REGISTER), // inCond
965 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
968 pCodeInstruction pciRRF = {
969 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
982 1,0, // dest, bit instruction
984 0, // literal operand
986 (PCC_C | PCC_REGISTER), // inCond
987 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
990 pCodeInstruction pciRRFW = {
991 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1004 0,0, // dest, bit instruction
1005 0,0, // branch, skip
1006 0, // literal operand
1008 (PCC_C | PCC_REGISTER), // inCond
1009 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1012 pCodeInstruction pciSUBWF = {
1013 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1019 NULL, // from branch
1026 1,0, // dest, bit instruction
1027 0,0, // branch, skip
1028 0, // literal operand
1030 (PCC_W | PCC_REGISTER), // inCond
1031 (PCC_REGISTER | PCC_Z) // outCond
1034 pCodeInstruction pciSUBFW = {
1035 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1041 NULL, // from branch
1048 0,0, // dest, bit instruction
1049 0,0, // branch, skip
1050 0, // literal operand
1052 (PCC_W | PCC_REGISTER), // inCond
1053 (PCC_W | PCC_Z) // outCond
1056 pCodeInstruction pciSUBLW = {
1057 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1063 NULL, // from branch
1070 0,0, // dest, bit instruction
1071 0,0, // branch, skip
1072 1, // literal operand
1074 (PCC_W | PCC_LITERAL), // inCond
1075 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1078 pCodeInstruction pciSWAPF = {
1079 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1085 NULL, // from branch
1092 1,0, // dest, bit instruction
1093 0,0, // branch, skip
1094 0, // literal operand
1096 (PCC_REGISTER), // inCond
1097 (PCC_REGISTER) // outCond
1100 pCodeInstruction pciSWAPFW = {
1101 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1107 NULL, // from branch
1114 0,0, // dest, bit instruction
1115 0,0, // branch, skip
1116 0, // literal operand
1118 (PCC_REGISTER), // inCond
1122 pCodeInstruction pciTRIS = {
1123 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1129 NULL, // from branch
1136 0,0, // dest, bit instruction
1137 0,0, // branch, skip
1138 0, // literal operand
1141 PCC_REGISTER // outCond
1144 pCodeInstruction pciXORWF = {
1145 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1151 NULL, // from branch
1158 1,0, // dest, bit instruction
1159 0,0, // branch, skip
1160 0, // literal operand
1162 (PCC_W | PCC_REGISTER), // inCond
1163 (PCC_REGISTER | PCC_Z) // outCond
1166 pCodeInstruction pciXORFW = {
1167 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1173 NULL, // from branch
1180 0,0, // dest, bit instruction
1181 0,0, // branch, skip
1182 0, // literal operand
1184 (PCC_W | PCC_REGISTER), // inCond
1185 (PCC_W | PCC_Z) // outCond
1188 pCodeInstruction pciXORLW = {
1189 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1195 NULL, // from branch
1202 0,0, // dest, bit instruction
1203 0,0, // branch, skip
1204 1, // literal operand
1206 (PCC_W | PCC_LITERAL), // inCond
1207 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1211 pCodeInstruction pciBANKSEL = {
1212 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1218 NULL, // from branch
1225 0,0, // dest, bit instruction
1226 0,0, // branch, skip
1227 0, // literal operand
1230 PCC_REGISTER // outCond
1233 pCodeInstruction pciPAGESEL = {
1234 {PC_OPCODE, NULL, NULL, 0, 0, NULL,
1240 NULL, // from branch
1247 0,0, // dest, bit instruction
1248 0,0, // branch, skip
1249 0, // literal operand
1252 PCC_REGISTER // outCond
1255 pCodeInstruction *pic14Mnemonics[MAX_PIC14MNEMONICS];
1258 /*-----------------------------------------------------------------*/
1259 /* return a unique ID number to assist pCodes debuging */
1260 /*-----------------------------------------------------------------*/
1261 unsigned PCodeID(void) {
1262 static unsigned int pcodeId = 1; /* unique ID number to be assigned to all pCodes */
1264 static unsigned int stop;
1265 if (pcodeId == 1448)
1266 stop++; // Place break point here
1271 #ifdef HAVE_VSNPRINTF
1272 // Alas, vsnprintf is not ANSI standard, and does not exist
1273 // on Solaris (and probably other non-Gnu flavored Unixes).
1275 /*-----------------------------------------------------------------*/
1276 /* SAFE_snprintf - like snprintf except the string pointer is */
1277 /* after the string has been printed to. This is */
1278 /* useful for printing to string as though if it */
1279 /* were a stream. */
1280 /*-----------------------------------------------------------------*/
1281 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1289 va_start(val, format);
1291 vsnprintf(*str, *size, format, val);
1296 if((size_t)len > *size) {
1297 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1298 fprintf(stderr,"len = %d is > str size %d\n",len,(int)*size);
1306 #else // HAVE_VSNPRINTF
1308 // This version is *not* safe, despite the name.
1310 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1314 static char buffer[1024]; /* grossly conservative, but still not inherently safe */
1319 va_start(val, format);
1321 vsprintf(buffer, format, val);
1324 len = strlen(buffer);
1326 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1327 fprintf(stderr,"len = %d is > str size %d\n",len,*size);
1330 strcpy(*str, buffer);
1336 #endif // HAVE_VSNPRINTF
1339 extern void initStack(int base_address, int size);
1340 extern regs *allocProcessorRegister(int rIdx, char * name, short po_type, int alias);
1341 extern regs *allocInternalRegister(int rIdx, char * name, short po_type, int alias);
1342 extern void init_pic(char *);
1344 void pCodeInitRegisters(void)
1346 static int initialized=0;
1347 int shareBankAddress,stkSize;
1353 init_pic(port->processor);
1354 shareBankAddress = 0x7f; /* FIXME - some PIC ICs like 16C7X which do not have a shared bank need a different approach. */
1355 if ((unsigned)shareBankAddress > getMaxRam()) /* If total RAM is less than 0x7f as with 16f84 then reduce shareBankAddress to fit */
1356 shareBankAddress = (int)getMaxRam();
1357 stkSize = 15; /* Set pseudo stack size to 15, on multi memory bank ICs this leaves room for WSAVE (used for interrupts) to fit into the shared portion of the memory bank */
1358 initStack(shareBankAddress, stkSize); /* Putting the pseudo stack in shared memory so all modules use the same register when passing fn parameters */
1360 pc_status.r = allocProcessorRegister(IDX_STATUS,"STATUS", PO_STATUS, 0x180);
1361 pc_pcl.r = allocProcessorRegister(IDX_PCL,"PCL", PO_PCL, 0x80);
1362 pc_pclath.r = allocProcessorRegister(IDX_PCLATH,"PCLATH", PO_PCLATH, 0x180);
1363 pc_fsr.r = allocProcessorRegister(IDX_FSR,"FSR", PO_FSR, 0x180);
1364 pc_indf.r = allocProcessorRegister(IDX_INDF,"INDF", PO_INDF, 0x180);
1365 pc_intcon.r = allocProcessorRegister(IDX_INTCON,"INTCON", PO_INTCON, 0x180);
1367 pc_status.rIdx = IDX_STATUS;
1368 pc_fsr.rIdx = IDX_FSR;
1369 pc_indf.rIdx = IDX_INDF;
1370 pc_intcon.rIdx = IDX_INTCON;
1371 pc_pcl.rIdx = IDX_PCL;
1372 pc_pclath.rIdx = IDX_PCLATH;
1374 pc_wsave.r = allocInternalRegister(IDX_WSAVE,pc_wsave.pcop.name,pc_wsave.pcop.type, 0x180); /* Interrupt storage for working register - must be same address in all banks ie section SHAREBANK. */
1375 pc_ssave.r = allocInternalRegister(IDX_SSAVE,pc_ssave.pcop.name,pc_ssave.pcop.type, 0); /* Interrupt storage for status register. */
1376 pc_psave.r = allocInternalRegister(IDX_PSAVE,pc_psave.pcop.name,pc_psave.pcop.type, 0); /* Interrupt storage for pclath register. */
1378 pc_wsave.rIdx = pc_wsave.r->rIdx;
1379 pc_ssave.rIdx = pc_ssave.r->rIdx;
1380 pc_psave.rIdx = pc_psave.r->rIdx;
1382 pc_wsave.r->isFixed = 1; /* Some PIC ICs do not have a sharebank - this register needs to be reserved across all banks. */
1383 pc_wsave.r->address = shareBankAddress-stkSize;
1384 pc_ssave.r->isFixed = 1; /* This register must be in the first bank. */
1385 pc_ssave.r->address = shareBankAddress-stkSize-1;
1386 pc_psave.r->isFixed = 1; /* This register must be in the first bank. */
1387 pc_psave.r->address = shareBankAddress-stkSize-2;
1389 /* probably should put this in a separate initialization routine */
1390 pb_dead_pcodes = newpBlock();
1394 /*-----------------------------------------------------------------*/
1395 /* mnem2key - convert a pic mnemonic into a hash key */
1396 /* (BTW - this spreads the mnemonics quite well) */
1398 /*-----------------------------------------------------------------*/
1400 int mnem2key(unsigned char const *mnem)
1409 key += toupper(*mnem++) +1;
1413 return (key & 0x1f);
1417 void pic14initMnemonics(void)
1422 pCodeInstruction *pci;
1424 if(mnemonics_initialized)
1427 //FIXME - probably should NULL out the array before making the assignments
1428 //since we check the array contents below this initialization.
1430 pic14Mnemonics[POC_ADDLW] = &pciADDLW;
1431 pic14Mnemonics[POC_ADDWF] = &pciADDWF;
1432 pic14Mnemonics[POC_ADDFW] = &pciADDFW;
1433 pic14Mnemonics[POC_ANDLW] = &pciANDLW;
1434 pic14Mnemonics[POC_ANDWF] = &pciANDWF;
1435 pic14Mnemonics[POC_ANDFW] = &pciANDFW;
1436 pic14Mnemonics[POC_BCF] = &pciBCF;
1437 pic14Mnemonics[POC_BSF] = &pciBSF;
1438 pic14Mnemonics[POC_BTFSC] = &pciBTFSC;
1439 pic14Mnemonics[POC_BTFSS] = &pciBTFSS;
1440 pic14Mnemonics[POC_CALL] = &pciCALL;
1441 pic14Mnemonics[POC_COMF] = &pciCOMF;
1442 pic14Mnemonics[POC_COMFW] = &pciCOMFW;
1443 pic14Mnemonics[POC_CLRF] = &pciCLRF;
1444 pic14Mnemonics[POC_CLRW] = &pciCLRW;
1445 pic14Mnemonics[POC_CLRWDT] = &pciCLRWDT;
1446 pic14Mnemonics[POC_DECF] = &pciDECF;
1447 pic14Mnemonics[POC_DECFW] = &pciDECFW;
1448 pic14Mnemonics[POC_DECFSZ] = &pciDECFSZ;
1449 pic14Mnemonics[POC_DECFSZW] = &pciDECFSZW;
1450 pic14Mnemonics[POC_GOTO] = &pciGOTO;
1451 pic14Mnemonics[POC_INCF] = &pciINCF;
1452 pic14Mnemonics[POC_INCFW] = &pciINCFW;
1453 pic14Mnemonics[POC_INCFSZ] = &pciINCFSZ;
1454 pic14Mnemonics[POC_INCFSZW] = &pciINCFSZW;
1455 pic14Mnemonics[POC_IORLW] = &pciIORLW;
1456 pic14Mnemonics[POC_IORWF] = &pciIORWF;
1457 pic14Mnemonics[POC_IORFW] = &pciIORFW;
1458 pic14Mnemonics[POC_MOVF] = &pciMOVF;
1459 pic14Mnemonics[POC_MOVFW] = &pciMOVFW;
1460 pic14Mnemonics[POC_MOVLW] = &pciMOVLW;
1461 pic14Mnemonics[POC_MOVWF] = &pciMOVWF;
1462 pic14Mnemonics[POC_NOP] = &pciNOP;
1463 pic14Mnemonics[POC_RETFIE] = &pciRETFIE;
1464 pic14Mnemonics[POC_RETLW] = &pciRETLW;
1465 pic14Mnemonics[POC_RETURN] = &pciRETURN;
1466 pic14Mnemonics[POC_RLF] = &pciRLF;
1467 pic14Mnemonics[POC_RLFW] = &pciRLFW;
1468 pic14Mnemonics[POC_RRF] = &pciRRF;
1469 pic14Mnemonics[POC_RRFW] = &pciRRFW;
1470 pic14Mnemonics[POC_SUBLW] = &pciSUBLW;
1471 pic14Mnemonics[POC_SUBWF] = &pciSUBWF;
1472 pic14Mnemonics[POC_SUBFW] = &pciSUBFW;
1473 pic14Mnemonics[POC_SWAPF] = &pciSWAPF;
1474 pic14Mnemonics[POC_SWAPFW] = &pciSWAPFW;
1475 pic14Mnemonics[POC_TRIS] = &pciTRIS;
1476 pic14Mnemonics[POC_XORLW] = &pciXORLW;
1477 pic14Mnemonics[POC_XORWF] = &pciXORWF;
1478 pic14Mnemonics[POC_XORFW] = &pciXORFW;
1479 pic14Mnemonics[POC_BANKSEL] = &pciBANKSEL;
1480 pic14Mnemonics[POC_PAGESEL] = &pciPAGESEL;
1482 for(i=0; i<MAX_PIC14MNEMONICS; i++)
1483 if(pic14Mnemonics[i])
1484 hTabAddItem(&pic14MnemonicsHash, mnem2key(pic14Mnemonics[i]->mnemonic), pic14Mnemonics[i]);
1485 pci = hTabFirstItem(pic14MnemonicsHash, &key);
1488 DFPRINTF((stderr, "element %d key %d, mnem %s\n",i++,key,pci->mnemonic));
1489 pci = hTabNextItem(pic14MnemonicsHash, &key);
1492 mnemonics_initialized = 1;
1495 int getpCodePeepCommand(char *cmd);
1497 int getpCode(char *mnem,unsigned dest)
1500 pCodeInstruction *pci;
1501 int key = mnem2key(mnem);
1503 if(!mnemonics_initialized)
1504 pic14initMnemonics();
1506 pci = hTabFirstItemWK(pic14MnemonicsHash, key);
1510 if(STRCASECMP(pci->mnemonic, mnem) == 0) {
1511 if((pci->num_ops <= 1) || (pci->isModReg == dest) || (pci->isBitInst))
1515 pci = hTabNextItemWK (pic14MnemonicsHash);
1522 /*-----------------------------------------------------------------*
1523 * pic14initpCodePeepCommands
1525 *-----------------------------------------------------------------*/
1526 void pic14initpCodePeepCommands(void)
1534 hTabAddItem(&pic14pCodePeepCommandsHash,
1535 mnem2key(peepCommands[i].cmd), &peepCommands[i]);
1537 } while (peepCommands[i].cmd);
1539 pcmd = hTabFirstItem(pic14pCodePeepCommandsHash, &key);
1542 //fprintf(stderr, "peep command %s key %d\n",pcmd->cmd,pcmd->id);
1543 pcmd = hTabNextItem(pic14pCodePeepCommandsHash, &key);
1548 /*-----------------------------------------------------------------
1551 *-----------------------------------------------------------------*/
1553 int getpCodePeepCommand(char *cmd)
1557 int key = mnem2key(cmd);
1560 pcmd = hTabFirstItemWK(pic14pCodePeepCommandsHash, key);
1563 // fprintf(stderr," comparing %s to %s\n",pcmd->cmd,cmd);
1564 if(STRCASECMP(pcmd->cmd, cmd) == 0) {
1568 pcmd = hTabNextItemWK (pic14pCodePeepCommandsHash);
1575 char getpBlock_dbName(pBlock *pb)
1581 return pb->cmemmap->dbName;
1585 void pBlockConvert2ISR(pBlock *pb)
1596 /*-----------------------------------------------------------------*/
1597 /* movepBlock2Head - given the dbname of a pBlock, move all */
1598 /* instances to the front of the doubly linked */
1599 /* list of pBlocks */
1600 /*-----------------------------------------------------------------*/
1602 void movepBlock2Head(char dbName)
1609 pb = the_pFile->pbHead;
1613 if(getpBlock_dbName(pb) == dbName) {
1614 pBlock *pbn = pb->next;
1615 pb->next = the_pFile->pbHead;
1616 the_pFile->pbHead->prev = pb;
1617 the_pFile->pbHead = pb;
1620 pb->prev->next = pbn;
1622 // If the pBlock that we just moved was the last
1623 // one in the link of all of the pBlocks, then we
1624 // need to point the tail to the block just before
1625 // the one we moved.
1626 // Note: if pb->next is NULL, then pb must have
1627 // been the last pBlock in the chain.
1630 pbn->prev = pb->prev;
1632 the_pFile->pbTail = pb->prev;
1643 void copypCode(FILE *of, char dbName)
1647 if(!of || !the_pFile)
1650 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1651 if(getpBlock_dbName(pb) == dbName) {
1660 void resetpCodeStatistics (void)
1662 pcode_insns = pcode_doubles = 0;
1665 void dumppCodeStatistics (FILE *of)
1667 /* dump statistics */
1669 fprintf (of, ";\tcode size estimation:\n");
1670 fprintf (of, ";\t%5u+%5u = %5u instructions (%5u byte)\n", pcode_insns, pcode_doubles, pcode_insns + pcode_doubles, 2*(pcode_insns + 2*pcode_doubles));
1674 void pcode_test(void)
1677 DFPRINTF((stderr,"pcode is alive!\n"));
1687 /* create the file name */
1688 strcpy(buffer,dstFileName);
1689 strcat(buffer,".p");
1691 if( !(pFile = fopen(buffer, "w" ))) {
1692 werror(E_FILE_OPEN_ERR,buffer);
1696 fprintf(pFile,"pcode dump\n\n");
1698 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1699 fprintf(pFile,"\n\tNew pBlock\n\n");
1701 fprintf(pFile,"%s",pb->cmemmap->sname);
1703 fprintf(pFile,"internal pblock");
1705 fprintf(pFile,", dbName =%c\n",getpBlock_dbName(pb));
1706 printpBlock(pFile,pb);
1710 /*-----------------------------------------------------------------*/
1711 /* int RegCond(pCodeOp *pcop) - if pcop points to the STATUS reg- */
1712 /* ister, RegCond will return the bit being referenced. */
1714 /* fixme - why not just OR in the pcop bit field */
1715 /*-----------------------------------------------------------------*/
1717 static int RegCond(pCodeOp *pcop)
1723 if (pcop->type == PO_GPR_BIT) {
1724 char *name = pcop->name;
1726 name = PCOR(pcop)->r->name;
1727 // if (strcmp(name, pc_status.pcop.name) != 0) { <<< This breaks the peep 2 optimisation
1728 switch(PCORB(pcop)->bit) {
1742 /*-----------------------------------------------------------------*/
1743 /* newpCode - create and return a newly initialized pCode */
1745 /* fixme - rename this */
1747 /* The purpose of this routine is to create a new Instruction */
1748 /* pCode. This is called by gen.c while the assembly code is being */
1752 /* PIC_OPCODE op - the assembly instruction we wish to create. */
1753 /* (note that the op is analogous to but not the */
1754 /* same thing as the opcode of the instruction.) */
1755 /* pCdoeOp *pcop - pointer to the operand of the instruction. */
1758 /* a pointer to the new malloc'd pCode is returned. */
1762 /*-----------------------------------------------------------------*/
1763 pCode *newpCode (PIC_OPCODE op, pCodeOp *pcop)
1765 pCodeInstruction *pci ;
1767 if(!mnemonics_initialized)
1768 pic14initMnemonics();
1770 pci = Safe_calloc(1, sizeof(pCodeInstruction));
1772 if((op>=0) && (op < MAX_PIC14MNEMONICS) && pic14Mnemonics[op]) {
1773 memcpy(pci, pic14Mnemonics[op], sizeof(pCodeInstruction));
1774 pci->pc.id = PCodeID();
1777 if(pci->inCond & PCC_EXAMINE_PCOP)
1778 pci->inCond |= RegCond(pcop);
1780 if(pci->outCond & PCC_EXAMINE_PCOP)
1781 pci->outCond |= RegCond(pcop);
1783 pci->pc.prev = pci->pc.next = NULL;
1784 return (pCode *)pci;
1787 fprintf(stderr, "pCode mnemonic error %s,%d\n",__FUNCTION__,__LINE__);
1793 /*-----------------------------------------------------------------*/
1794 /* newpCodeWild - create a "wild" as in wild card pCode */
1796 /* Wild pcodes are used during the peep hole optimizer to serve */
1797 /* as place holders for any instruction. When a snippet of code is */
1798 /* compared to a peep hole rule, the wild card opcode will match */
1799 /* any instruction. However, the optional operand and label are */
1800 /* additional qualifiers that must also be matched before the */
1801 /* line (of assembly code) is declared matched. Note that the */
1802 /* operand may be wild too. */
1804 /* Note, a wild instruction is specified just like a wild var: */
1805 /* %4 ; A wild instruction, */
1806 /* See the peeph.def file for additional examples */
1808 /*-----------------------------------------------------------------*/
1810 pCode *newpCodeWild(int pCodeID, pCodeOp *optional_operand, pCodeOp *optional_label)
1815 pcw = Safe_calloc(1,sizeof(pCodeWild));
1817 pcw->pci.pc.type = PC_WILD;
1818 pcw->pci.pc.prev = pcw->pci.pc.next = NULL;
1819 pcw->id = PCodeID();
1820 pcw->pci.from = pcw->pci.to = pcw->pci.label = NULL;
1821 pcw->pci.pc.pb = NULL;
1823 // pcw->pci.pc.analyze = genericAnalyze;
1824 pcw->pci.pc.destruct = genericDestruct;
1825 pcw->pci.pc.print = genericPrint;
1827 pcw->id = pCodeID; // this is the 'n' in %n
1828 pcw->operand = optional_operand;
1829 pcw->label = optional_label;
1831 pcw->mustBeBitSkipInst = 0;
1832 pcw->mustNotBeBitSkipInst = 0;
1833 pcw->invertBitSkipInst = 0;
1835 return ( (pCode *)pcw);
1839 /*-----------------------------------------------------------------*/
1840 /* newPcodeInlineP - create a new pCode from a char string */
1841 /*-----------------------------------------------------------------*/
1844 pCode *newpCodeInlineP(char *cP)
1849 pcc = Safe_calloc(1,sizeof(pCodeComment));
1851 pcc->pc.type = PC_INLINE;
1852 pcc->pc.prev = pcc->pc.next = NULL;
1853 pcc->pc.id = PCodeID();
1854 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1857 // pcc->pc.analyze = genericAnalyze;
1858 pcc->pc.destruct = genericDestruct;
1859 pcc->pc.print = genericPrint;
1862 pcc->comment = Safe_strdup(cP);
1864 pcc->comment = NULL;
1866 return ( (pCode *)pcc);
1870 /*-----------------------------------------------------------------*/
1871 /* newPcodeCharP - create a new pCode from a char string */
1872 /*-----------------------------------------------------------------*/
1874 pCode *newpCodeCharP(char *cP)
1879 pcc = Safe_calloc(1,sizeof(pCodeComment));
1881 pcc->pc.type = PC_COMMENT;
1882 pcc->pc.prev = pcc->pc.next = NULL;
1883 pcc->pc.id = PCodeID();
1884 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1887 // pcc->pc.analyze = genericAnalyze;
1888 pcc->pc.destruct = genericDestruct;
1889 pcc->pc.print = genericPrint;
1892 pcc->comment = Safe_strdup(cP);
1894 pcc->comment = NULL;
1896 return ( (pCode *)pcc);
1900 /*-----------------------------------------------------------------*/
1901 /* newpCodeFunction - */
1902 /*-----------------------------------------------------------------*/
1905 pCode *newpCodeFunction(char *mod,char *f,int isPublic)
1909 pcf = Safe_calloc(1,sizeof(pCodeFunction));
1910 //_ALLOC(pcf,sizeof(pCodeFunction));
1912 pcf->pc.type = PC_FUNCTION;
1913 pcf->pc.prev = pcf->pc.next = NULL;
1914 pcf->pc.id = PCodeID();
1915 //pcf->pc.from = pcf->pc.to = pcf->pc.label = NULL;
1918 // pcf->pc.analyze = genericAnalyze;
1919 pcf->pc.destruct = genericDestruct;
1920 pcf->pc.print = pCodePrintFunction;
1925 //_ALLOC_ATOMIC(pcf->modname,strlen(mod)+1);
1926 pcf->modname = Safe_calloc(1,strlen(mod)+1);
1927 strcpy(pcf->modname,mod);
1929 pcf->modname = NULL;
1932 //_ALLOC_ATOMIC(pcf->fname,strlen(f)+1);
1933 pcf->fname = Safe_calloc(1,strlen(f)+1);
1934 strcpy(pcf->fname,f);
1938 pcf->isPublic = (unsigned)isPublic;
1940 return ( (pCode *)pcf);
1944 /*-----------------------------------------------------------------*/
1946 /*-----------------------------------------------------------------*/
1947 void destructpCodeFlow(pCode *pc)
1949 if(!pc || !isPCFL(pc))
1958 deleteSet(&PCFL(pc)->registers);
1959 deleteSet(&PCFL(pc)->from);
1960 deleteSet(&PCFL(pc)->to);
1965 pCode *newpCodeFlow(void )
1969 //_ALLOC(pcflow,sizeof(pCodeFlow));
1970 pcflow = Safe_calloc(1,sizeof(pCodeFlow));
1972 pcflow->pc.type = PC_FLOW;
1973 pcflow->pc.prev = pcflow->pc.next = NULL;
1974 pcflow->pc.pb = NULL;
1976 // pcflow->pc.analyze = genericAnalyze;
1977 pcflow->pc.destruct = destructpCodeFlow;
1978 pcflow->pc.print = genericPrint;
1980 pcflow->pc.seq = GpcFlowSeq++;
1982 pcflow->from = pcflow->to = NULL;
1984 pcflow->inCond = PCC_NONE;
1985 pcflow->outCond = PCC_NONE;
1987 pcflow->firstBank = 'U'; /* Undetermined */
1988 pcflow->lastBank = 'U'; /* Undetermined */
1990 pcflow->FromConflicts = 0;
1991 pcflow->ToConflicts = 0;
1995 pcflow->registers = newSet();
1997 return ( (pCode *)pcflow);
2001 /*-----------------------------------------------------------------*/
2002 /*-----------------------------------------------------------------*/
2003 pCodeFlowLink *newpCodeFlowLink(pCodeFlow *pcflow)
2005 pCodeFlowLink *pcflowLink;
2007 pcflowLink = Safe_calloc(1,sizeof(pCodeFlowLink));
2009 pcflowLink->pcflow = pcflow;
2010 pcflowLink->bank_conflict = 0;
2015 /*-----------------------------------------------------------------*/
2016 /* newpCodeCSource - create a new pCode Source Symbol */
2017 /*-----------------------------------------------------------------*/
2019 pCode *newpCodeCSource(int ln, char *f, const char *l)
2024 pccs = Safe_calloc(1,sizeof(pCodeCSource));
2026 pccs->pc.type = PC_CSOURCE;
2027 pccs->pc.prev = pccs->pc.next = NULL;
2028 pccs->pc.id = PCodeID();
2031 pccs->pc.destruct = genericDestruct;
2032 pccs->pc.print = genericPrint;
2034 pccs->line_number = ln;
2036 pccs->line = Safe_strdup(l);
2041 pccs->file_name = Safe_strdup(f);
2043 pccs->file_name = NULL;
2045 return ( (pCode *)pccs);
2049 /*******************************************************************/
2050 /* pic16_newpCodeAsmDir - create a new pCode Assembler Directive */
2051 /* added by VR 6-Jun-2003 */
2052 /*******************************************************************/
2054 pCode *newpCodeAsmDir(char *asdir, char *argfmt, ...)
2061 pcad = Safe_calloc(1, sizeof(pCodeAsmDir));
2062 pcad->pci.pc.type = PC_ASMDIR;
2063 pcad->pci.pc.prev = pcad->pci.pc.next = NULL;
2064 pcad->pci.pc.pb = NULL;
2065 pcad->pci.pc.destruct = genericDestruct;
2066 pcad->pci.pc.print = genericPrint;
2068 if(asdir && *asdir) {
2070 while(isspace((unsigned char)*asdir))asdir++; // strip any white space from the beginning
2072 pcad->directive = Safe_strdup( asdir );
2075 va_start(ap, argfmt);
2077 memset(buffer, 0, sizeof(buffer));
2078 if(argfmt && *argfmt)
2079 vsprintf(buffer, argfmt, ap);
2083 while(isspace((unsigned char)*lbp))lbp++;
2086 pcad->arg = Safe_strdup( lbp );
2088 return ((pCode *)pcad);
2091 /*-----------------------------------------------------------------*/
2092 /* pCodeLabelDestruct - free memory used by a label. */
2093 /*-----------------------------------------------------------------*/
2094 static void pCodeLabelDestruct(pCode *pc)
2100 if((pc->type == PC_LABEL) && PCL(pc)->label)
2101 free(PCL(pc)->label);
2107 pCode *newpCodeLabel(char *name, int key)
2113 pcl = Safe_calloc(1,sizeof(pCodeLabel) );
2115 pcl->pc.type = PC_LABEL;
2116 pcl->pc.prev = pcl->pc.next = NULL;
2117 pcl->pc.id = PCodeID();
2118 //pcl->pc.from = pcl->pc.to = pcl->pc.label = NULL;
2121 // pcl->pc.analyze = genericAnalyze;
2122 pcl->pc.destruct = pCodeLabelDestruct;
2123 pcl->pc.print = pCodePrintLabel;
2129 sprintf(s,"_%05d_DS_",key);
2134 pcl->label = Safe_strdup(s);
2136 //fprintf(stderr,"newpCodeLabel: key=%d, name=%s\n",key, ((s)?s:""));
2137 return ( (pCode *)pcl);
2142 /*-----------------------------------------------------------------*/
2143 /* newpBlock - create and return a pointer to a new pBlock */
2144 /*-----------------------------------------------------------------*/
2145 pBlock *newpBlock(void)
2150 PpB = Safe_calloc(1,sizeof(pBlock) );
2151 PpB->next = PpB->prev = NULL;
2153 PpB->function_entries = PpB->function_exits = PpB->function_calls = NULL;
2154 PpB->tregisters = NULL;
2156 PpB->FlowTree = NULL;
2162 /*-----------------------------------------------------------------*/
2163 /* newpCodeChain - create a new chain of pCodes */
2164 /*-----------------------------------------------------------------*
2166 * This function will create a new pBlock and the pointer to the
2167 * pCode that is passed in will be the first pCode in the block.
2168 *-----------------------------------------------------------------*/
2171 pBlock *newpCodeChain(memmap *cm,char c, pCode *pc)
2174 pBlock *pB = newpBlock();
2176 pB->pcHead = pB->pcTail = pc;
2183 /*-----------------------------------------------------------------*/
2184 /* newpCodeOpLabel - Create a new label given the key */
2185 /* Note, a negative key means that the label is part of wild card */
2186 /* (and hence a wild card label) used in the pCodePeep */
2187 /* optimizations). */
2188 /*-----------------------------------------------------------------*/
2190 pCodeOp *newpCodeOpLabel(char *name, int key)
2193 static int label_key=-1;
2197 pcop = Safe_calloc(1,sizeof(pCodeOpLabel) );
2198 pcop->type = PO_LABEL;
2203 sprintf(s=buffer,"_%05d_DS_",key);
2205 s = name, key = label_key--;
2207 PCOLAB(pcop)->offset = 0;
2209 pcop->name = Safe_strdup(s);
2211 ((pCodeOpLabel *)pcop)->key = key;
2213 //fprintf(stderr,"newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
2217 /*-----------------------------------------------------------------*/
2218 /*-----------------------------------------------------------------*/
2219 pCodeOp *newpCodeOpLit(int lit)
2225 pcop = Safe_calloc(1,sizeof(pCodeOpLit) );
2226 pcop->type = PO_LITERAL;
2230 sprintf(s,"0x%02x",lit);
2232 pcop->name = Safe_strdup(s);
2235 ((pCodeOpLit *)pcop)->lit = lit;
2240 /*-----------------------------------------------------------------*/
2241 /*-----------------------------------------------------------------*/
2242 pCodeOp *newpCodeOpImmd(char *name, int offset, int index, int code_space, int is_func)
2246 pcop = Safe_calloc(1,sizeof(pCodeOpImmd) );
2247 pcop->type = PO_IMMEDIATE;
2250 pcop->name = Safe_strdup(name);
2253 r = dirregWithName(name);
2257 //fprintf(stderr, " newpCodeOpImmd reg %s exists\n",name);
2258 PCOI(pcop)->rIdx = r->rIdx;
2260 //fprintf(stderr, " newpCodeOpImmd reg %s doesn't exist\n",name);
2261 PCOI(pcop)->rIdx = -1;
2263 //fprintf(stderr,"%s %s %d\n",__FUNCTION__,name,offset);
2268 PCOI(pcop)->index = index;
2269 PCOI(pcop)->offset = offset;
2270 PCOI(pcop)->_const = code_space;
2271 PCOI(pcop)->_function = is_func;
2276 /*-----------------------------------------------------------------*/
2277 /*-----------------------------------------------------------------*/
2278 pCodeOp *newpCodeOpWild(int id, pCodeWildBlock *pcwb, pCodeOp *subtype)
2284 if(!pcwb || !subtype) {
2285 fprintf(stderr, "Wild opcode declaration error: %s-%d\n",__FILE__,__LINE__);
2289 pcop = Safe_calloc(1,sizeof(pCodeOpWild));
2290 pcop->type = PO_WILD;
2291 sprintf(s,"%%%d",id);
2292 pcop->name = Safe_strdup(s);
2294 PCOW(pcop)->id = id;
2295 PCOW(pcop)->pcwb = pcwb;
2296 PCOW(pcop)->subtype = subtype;
2297 PCOW(pcop)->matched = NULL;
2301 /*-----------------------------------------------------------------*/
2302 /* Find a symbol with matching name */
2303 /*-----------------------------------------------------------------*/
2304 static symbol *symFindWithName(memmap * map, const char *name)
2308 for (sym = setFirstItem(map->syms); sym; sym = setNextItem (map->syms)) {
2309 if (sym->rname && (strcmp(sym->rname,name)==0))
2315 /*-----------------------------------------------------------------*/
2316 /*-----------------------------------------------------------------*/
2317 pCodeOp *newpCodeOpBit(char *name, int ibit, int inBitSpace)
2322 pcop = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2323 pcop->type = PO_GPR_BIT;
2325 PCORB(pcop)->bit = ibit;
2326 PCORB(pcop)->inBitSpace = inBitSpace;
2328 if (name) r = regFindWithName(name);
2330 // Register has not been allocated - check for symbol information
2332 sym = symFindWithName(bit, name);
2333 if (!sym) sym = symFindWithName(sfrbit, name);
2334 if (!sym) sym = symFindWithName(sfr, name);
2336 r = allocNewDirReg(sym->etype,name);
2342 PCOR(pcop)->rIdx = r->rIdx;
2344 pcop->name = Safe_strdup(name);
2345 PCOR(pcop)->r = NULL;
2346 PCOR(pcop)->rIdx = 0;
2351 /*-----------------------------------------------------------------*
2352 * pCodeOp *newpCodeOpReg(int rIdx) - allocate a new register
2354 * If rIdx >=0 then a specific register from the set of registers
2355 * will be selected. If rIdx <0, then a new register will be searched
2357 *-----------------------------------------------------------------*/
2359 pCodeOp *newpCodeOpReg(int rIdx)
2363 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2368 PCOR(pcop)->rIdx = rIdx;
2369 PCOR(pcop)->r = pic14_regWithIdx(rIdx);
2371 PCOR(pcop)->r = pic14_findFreeReg(REG_GPR);
2374 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2378 pcop->type = PCOR(pcop)->r->pc_type;
2383 pCodeOp *newpCodeOpRegFromStr(char *name)
2387 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2388 PCOR(pcop)->r = allocRegByName(name, 1);
2389 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2390 pcop->type = PCOR(pcop)->r->pc_type;
2391 pcop->name = PCOR(pcop)->r->name;
2396 pCodeOp *newpCodeOpStr(char *name)
2400 pcop = Safe_calloc(1,sizeof(pCodeOpStr));
2401 pcop->type = PO_STR;
2402 pcop->name = Safe_strdup(name);
2404 PCOS(pcop)->isPublic = 0;
2410 /*-----------------------------------------------------------------*/
2411 /*-----------------------------------------------------------------*/
2413 pCodeOp *newpCodeOp(char *name, PIC_OPTYPE type)
2420 pcop = newpCodeOpBit(name, -1,0);
2424 pcop = newpCodeOpLit(-1);
2428 pcop = newpCodeOpLabel(NULL,-1);
2432 pcop = newpCodeOpReg(-1);
2435 case PO_GPR_POINTER:
2436 case PO_GPR_REGISTER:
2438 pcop = newpCodeOpRegFromStr(name);
2440 pcop = newpCodeOpReg(-1);
2444 pcop = newpCodeOpStr(name);
2448 pcop = Safe_calloc(1,sizeof(pCodeOp) );
2451 pcop->name = Safe_strdup(name);
2459 /*-----------------------------------------------------------------*/
2460 /*-----------------------------------------------------------------*/
2461 void pCodeConstString(char *name, char *value)
2466 // fprintf(stderr, " %s %s %s\n",__FUNCTION__,name,value);
2471 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2475 sprintf(buffer,"; %s = %s",name,value);
2476 for (i=strlen(buffer); i--; ) {
2477 unsigned char c = buffer[i];
2478 if (c=='\r' || c=='\n') {
2479 memmove(buffer+i+1,buffer+i,strlen(buffer)-i+1);
2481 if (c=='\r') buffer[i+1] = 'r';
2482 else if (c=='\n') buffer[i+1] = 'n';
2486 addpCode2pBlock(pb,newpCodeCharP(buffer));
2487 addpCode2pBlock(pb,newpCodeLabel(name,-1));
2490 addpCode2pBlock(pb,newpCode(POC_RETLW,newpCodeOpLit(*value)));
2496 /*-----------------------------------------------------------------*/
2497 /*-----------------------------------------------------------------*/
2498 void pCodeReadCodeTable(void)
2502 fprintf(stderr, " %s\n",__FUNCTION__);
2504 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2508 addpCode2pBlock(pb,newpCodeCharP("; ReadCodeTable - built in function"));
2509 addpCode2pBlock(pb,newpCodeCharP("; Inputs: temp1,temp2 = code pointer"));
2510 addpCode2pBlock(pb,newpCodeCharP("; Outpus: W (from RETLW at temp2:temp1)"));
2511 addpCode2pBlock(pb,newpCodeLabel("ReadCodeTable:",-1));
2513 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp2")));
2514 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCLATH")));
2515 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp1")));
2516 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCL")));
2521 /*-----------------------------------------------------------------*/
2522 /* addpCode2pBlock - place the pCode into the pBlock linked list */
2523 /*-----------------------------------------------------------------*/
2524 void addpCode2pBlock(pBlock *pb, pCode *pc)
2531 /* If this is the first pcode to be added to a block that
2532 * was initialized with a NULL pcode, then go ahead and
2533 * make this pcode the head and tail */
2534 pb->pcHead = pb->pcTail = pc;
2537 pb->pcTail->next = pc;
2539 pc->prev = pb->pcTail;
2546 /*-----------------------------------------------------------------*/
2547 /* addpBlock - place a pBlock into the pFile */
2548 /*-----------------------------------------------------------------*/
2549 void addpBlock(pBlock *pb)
2551 // fprintf(stderr," Adding pBlock: dbName =%c\n",getpBlock_dbName(pb));
2554 /* First time called, we'll pass through here. */
2555 //_ALLOC(the_pFile,sizeof(pFile));
2556 the_pFile = Safe_calloc(1,sizeof(pFile));
2557 the_pFile->pbHead = the_pFile->pbTail = pb;
2558 the_pFile->functions = NULL;
2562 the_pFile->pbTail->next = pb;
2563 pb->prev = the_pFile->pbTail;
2565 the_pFile->pbTail = pb;
2568 /*-----------------------------------------------------------------*/
2569 /* removepBlock - remove a pBlock from the pFile */
2570 /*-----------------------------------------------------------------*/
2571 void removepBlock(pBlock *pb)
2579 //fprintf(stderr," Removing pBlock: dbName =%c\n",getpBlock_dbName(pb));
2581 for(pbs = the_pFile->pbHead; pbs; pbs = pbs->next) {
2584 if(pbs == the_pFile->pbHead)
2585 the_pFile->pbHead = pbs->next;
2587 if (pbs == the_pFile->pbTail)
2588 the_pFile->pbTail = pbs->prev;
2591 pbs->next->prev = pbs->prev;
2594 pbs->prev->next = pbs->next;
2601 fprintf(stderr, "Warning: call to %s:%s didn't find pBlock\n",__FILE__,__FUNCTION__);
2605 /*-----------------------------------------------------------------*/
2606 /* printpCode - write the contents of a pCode to a file */
2607 /*-----------------------------------------------------------------*/
2608 void printpCode(FILE *of, pCode *pc)
2619 fprintf(of,"warning - unable to print pCode\n");
2622 /*-----------------------------------------------------------------*/
2623 /* printpBlock - write the contents of a pBlock to a file */
2624 /*-----------------------------------------------------------------*/
2625 void printpBlock(FILE *of, pBlock *pb)
2635 for(pc = pb->pcHead; pc; pc = pc->next) {
2640 if (isPCI(pc) && (PCI(pc)->op == POC_PAGESEL || PCI(pc)->op == POC_BANKSEL)) {
2650 /*-----------------------------------------------------------------*/
2652 /* pCode processing */
2656 /*-----------------------------------------------------------------*/
2658 void unlinkpCode(pCode *pc)
2664 fprintf(stderr,"Unlinking: ");
2665 printpCode(stderr, pc);
2668 pc->prev->next = pc->next;
2670 pc->next->prev = pc->prev;
2673 /* RN: I believe this should be right here, but this did not
2674 * cure the bug I was hunting... */
2675 /* must keep labels -- attach to following instruction */
2676 if (isPCI(pc) && PCI(pc)->label && pc->next)
2678 pCodeInstruction *pcnext = PCI(findNextInstruction (pc->next));
2681 pBranchAppend (pcnext->label, PCI(pc)->label);
2685 pc->prev = pc->next = NULL;
2689 /*-----------------------------------------------------------------*/
2690 /*-----------------------------------------------------------------*/
2692 static void genericDestruct(pCode *pc)
2698 /* For instructions, tell the register (if there's one used)
2699 * that it's no longer needed */
2700 regs *reg = getRegFromInstruction(pc);
2702 deleteSetItem (&(reg->reglives.usedpCodes),pc);
2705 /* Instead of deleting the memory used by this pCode, mark
2706 * the object as bad so that if there's a pointer to this pCode
2707 * dangling around somewhere then (hopefully) when the type is
2708 * checked we'll catch it.
2713 addpCode2pBlock(pb_dead_pcodes, pc);
2720 /*-----------------------------------------------------------------*/
2721 /* Copies the pCodeInstruction flow pointer from source pCode */
2722 /*-----------------------------------------------------------------*/
2723 static void CopyFlow(pCodeInstruction *pcd, pCode *pcs) {
2725 pCodeFlow *pcflow = 0;
2726 for (p=pcs; p; p=p->prev) {
2728 pcflow = PCI(p)->pcflow;
2732 pcflow = (pCodeFlow*)p;
2736 PCI(pcd)->pcflow = pcflow;
2739 /*-----------------------------------------------------------------*/
2740 /* pCodeInsertAfter - splice in the pCode chain starting with pc2 */
2741 /* into the pCode chain containing pc1 */
2742 /*-----------------------------------------------------------------*/
2743 void pCodeInsertAfter(pCode *pc1, pCode *pc2)
2749 pc2->next = pc1->next;
2751 pc1->next->prev = pc2;
2757 /* If this is an instrution type propogate the flow */
2759 CopyFlow(PCI(pc2),pc1);
2762 /*------------------------------------------------------------------*/
2763 /* pCodeInsertBefore - splice in the pCode chain starting with pc2 */
2764 /* into the pCode chain containing pc1 */
2765 /*------------------------------------------------------------------*/
2766 void pCodeInsertBefore(pCode *pc1, pCode *pc2)
2772 pc2->prev = pc1->prev;
2774 pc1->prev->next = pc2;
2780 /* If this is an instrution type propogate the flow */
2782 CopyFlow(PCI(pc2),pc1);
2785 /*-----------------------------------------------------------------*/
2786 /* pCodeOpCopy - copy a pcode operator */
2787 /*-----------------------------------------------------------------*/
2788 pCodeOp *pCodeOpCopy(pCodeOp *pcop)
2790 pCodeOp *pcopnew=NULL;
2795 switch(pcop->type) {
2798 pcopnew = Safe_calloc (1, sizeof (pCodeOp));
2799 memcpy (pcopnew, pcop, sizeof (pCodeOp));
2807 case PO_GPR_REGISTER:
2809 case PO_GPR_POINTER:
2810 case PO_SFR_REGISTER:
2814 //DFPRINTF((stderr,"pCodeOpCopy GPR register\n"));
2815 pcopnew = Safe_calloc(1,sizeof(pCodeOpReg) );
2816 memcpy (pcopnew, pcop, sizeof (pCodeOpReg));
2817 DFPRINTF((stderr," register index %d\n", PCOR(pcop)->r->rIdx));
2821 //DFPRINTF((stderr,"pCodeOpCopy lit\n"));
2822 pcopnew = Safe_calloc(1,sizeof(pCodeOpLit) );
2823 memcpy (pcopnew, pcop, sizeof (pCodeOpLit));
2827 pcopnew = Safe_calloc(1,sizeof(pCodeOpImmd) );
2828 memcpy (pcopnew, pcop, sizeof (pCodeOpImmd));
2834 //DFPRINTF((stderr,"pCodeOpCopy bit\n"));
2835 pcopnew = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2836 memcpy (pcopnew, pcop, sizeof (pCodeOpRegBit));
2840 //DFPRINTF((stderr,"pCodeOpCopy label\n"));
2841 pcopnew = Safe_calloc(1,sizeof(pCodeOpLabel) );
2842 memcpy (pcopnew, pcop, sizeof(pCodeOpLabel));
2846 /* Here we expand the wild card into the appropriate type: */
2847 /* By recursively calling pCodeOpCopy */
2848 //DFPRINTF((stderr,"pCodeOpCopy wild\n"));
2849 if(PCOW(pcop)->matched)
2850 pcopnew = pCodeOpCopy(PCOW(pcop)->matched);
2853 pcopnew = pCodeOpCopy(PCOW(pcop)->subtype);
2854 pcopnew->name = Safe_strdup(PCOW(pcop)->pcwb->vars[PCOW(pcop)->id]);
2855 //DFPRINTF((stderr,"copied a wild op named %s\n",pcopnew->name));
2862 assert ( !"unhandled pCodeOp type copied" );
2867 pcopnew->name = Safe_strdup(pcop->name);
2869 pcopnew->name = NULL;
2874 /*-----------------------------------------------------------------*/
2875 /* popCopyReg - copy a pcode operator */
2876 /*-----------------------------------------------------------------*/
2877 pCodeOp *popCopyReg(pCodeOpReg *pc)
2881 pcor = Safe_calloc(1,sizeof(pCodeOpReg) );
2882 pcor->pcop.type = pc->pcop.type;
2884 if(!(pcor->pcop.name = Safe_strdup(pc->pcop.name)))
2885 fprintf(stderr,"oops %s %d",__FILE__,__LINE__);
2887 pcor->pcop.name = NULL;
2889 if (pcor->pcop.type == PO_IMMEDIATE){
2890 PCOL(pcor)->lit = PCOL(pc)->lit;
2893 pcor->rIdx = pc->rIdx;
2897 //DEBUGpic14_emitcode ("; ***","%s , copying %s, rIdx=%d",__FUNCTION__,pc->pcop.name,pc->rIdx);
2902 /*-----------------------------------------------------------------*/
2903 /* pCodeInstructionCopy - copy a pCodeInstructionCopy */
2904 /*-----------------------------------------------------------------*/
2905 pCode *pCodeInstructionCopy(pCodeInstruction *pci,int invert)
2907 pCodeInstruction *new_pci;
2910 new_pci = PCI(newpCode(pci->inverted_op,pci->pcop));
2912 new_pci = PCI(newpCode(pci->op,pci->pcop));
2914 new_pci->pc.pb = pci->pc.pb;
2915 new_pci->from = pci->from;
2916 new_pci->to = pci->to;
2917 new_pci->label = pci->label;
2918 new_pci->pcflow = pci->pcflow;
2920 return PCODE(new_pci);
2923 /*-----------------------------------------------------------------*/
2924 /*-----------------------------------------------------------------*/
2925 void pCodeDeleteChain(pCode *f,pCode *t)
2930 DFPRINTF((stderr,"delete pCode:\n"));
2932 //f->print(stderr,f);
2933 //f->delete(f); this dumps core...
2938 /*-----------------------------------------------------------------*/
2939 /*-----------------------------------------------------------------*/
2940 void pBlockRegs(FILE *of, pBlock *pb)
2945 r = setFirstItem(pb->tregisters);
2947 r = setNextItem(pb->tregisters);
2952 /*-----------------------------------------------------------------*/
2953 /*-----------------------------------------------------------------*/
2954 char *get_op(pCodeOp *pcop,char *buffer, size_t size)
2959 int use_buffer = 1; // copy the string to the passed buffer pointer
2964 use_buffer = 0; // Don't bother copying the string to the buffer.
2968 switch(pcop->type) {
2972 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
2975 //return PCOR(pcop)->r->name;
2979 if (PCOR(pcop)->r->type == REG_STK)
2980 r = typeRegWithIdx(PCOR(pcop)->r->rIdx,REG_STK,1);
2982 r = pic14_regWithIdx(PCOR(pcop)->r->rIdx);
2985 SAFE_snprintf(&buffer,&size,"%s",r->name);
2994 if(PCOI(pcop)->_const) {
2996 if( PCOI(pcop)->offset >= 0 && PCOI(pcop)->offset<4) {
2997 switch(PCOI(pcop)->offset) {
2999 SAFE_snprintf(&s,&size,"low (%s+%d)",pcop->name, PCOI(pcop)->index);
3002 SAFE_snprintf(&s,&size,"high (%s+%d)",pcop->name, PCOI(pcop)->index);
3005 fprintf (stderr, "PO_IMMEDIATE/_const/offset=%d\n", PCOI(pcop)->offset);
3006 assert ( !"offset too large" );
3007 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
3010 8 * PCOI(pcop)->offset );
3013 SAFE_snprintf(&s,&size,"LOW (%s+%d)",pcop->name,PCOI(pcop)->index);
3015 if( !PCOI(pcop)->offset) { // && PCOI(pcc->pcop)->offset<4) {
3016 SAFE_snprintf(&s,&size,"(%s + %d)",
3020 switch(PCOI(pcop)->offset) {
3022 SAFE_snprintf(&s,&size,"(%s + %d)",pcop->name, PCOI(pcop)->index);
3025 SAFE_snprintf(&s,&size,"high (%s + %d)",pcop->name, PCOI(pcop)->index);
3028 fprintf (stderr, "PO_IMMEDIATE/mutable/offset=%d\n", PCOI(pcop)->offset);
3029 assert ( !"offset too large" );
3030 SAFE_snprintf(&s,&size,"((%s + %d) >> %d)&0xff",pcop->name, PCOI(pcop)->index, 8*PCOI(pcop)->offset);
3040 //size = sizeof(buffer);
3041 if( PCOR(pcop)->instance) {
3042 SAFE_snprintf(&s,&size,"(%s + %d)",
3044 PCOR(pcop)->instance );
3045 //fprintf(stderr,"PO_DIR %s\n",buffer);
3047 SAFE_snprintf(&s,&size,"%s",pcop->name);
3053 if(PCOLAB(pcop)->offset == 1)
3054 SAFE_snprintf(&s,&size,"HIGH(%s)",pcop->name);
3056 SAFE_snprintf(&s,&size,"%s",pcop->name);
3063 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
3066 return PCOR(pcop)->r->name;
3069 /* fall through to the default case */
3073 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
3081 printf("PIC port internal warning: (%s:%d) %s not found\n",
3086 return "NO operand";
3090 /*-----------------------------------------------------------------*/
3091 /*-----------------------------------------------------------------*/
3092 static char *get_op_from_instruction( pCodeInstruction *pcc)
3096 return get_op(pcc->pcop,NULL,0);
3098 return ("ERROR Null: get_op_from_instruction");
3102 /*-----------------------------------------------------------------*/
3103 /*-----------------------------------------------------------------*/
3104 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
3106 fprintf(of,"pcodeopprint- not implemented\n");
3109 /*-----------------------------------------------------------------*/
3110 /* pCode2str - convert a pCode instruction to string */
3111 /*-----------------------------------------------------------------*/
3112 char *pCode2str(char *str, size_t size, pCode *pc)
3120 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
3122 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
3124 if(PCI(pc)->isBitInst) {
3125 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3126 char *name = PCI(pc)->pcop->name;
3128 name = PCOR(PCI(pc)->pcop)->r->name;
3129 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
3130 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)", name, name);
3132 SAFE_snprintf(&s,&size,"%s,%d", name,
3133 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit)&7);
3134 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3135 SAFE_snprintf(&s,&size,"%s,%d", get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
3137 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", get_op_from_instruction(PCI(pc)));
3138 //PCI(pc)->pcop->t.bit );
3140 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3141 if( PCI(pc)->num_ops == 2)
3142 SAFE_snprintf(&s,&size,"(%s >> 3),%c",get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
3144 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",get_op_from_instruction(PCI(pc)));
3146 SAFE_snprintf(&s,&size,"%s",get_op_from_instruction(PCI(pc)));
3147 if( PCI(pc)->num_ops == 2)
3148 SAFE_snprintf(&s,&size,",%c", ( (PCI(pc)->isModReg) ? 'F':'W'));
3155 /* assuming that comment ends with a \n */
3156 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
3160 /* assuming that inline code ends with a \n */
3161 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
3165 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
3168 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
3171 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
3174 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
3177 // SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3178 SAFE_snprintf(&s,&size,"%s\t.line\t%d; \"%s\"\t%s\n",(options.debug?"":";"),PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
3181 if(PCAD(pc)->directive) {
3182 SAFE_snprintf(&s,&size,"\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
3183 } else if(PCAD(pc)->arg) {
3184 /* special case to handle inline labels without a tab */
3185 SAFE_snprintf(&s,&size,"%s\n", PCAD(pc)->arg);
3190 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
3196 /*-----------------------------------------------------------------*/
3197 /* genericPrint - the contents of a pCode to a file */
3198 /*-----------------------------------------------------------------*/
3199 static void genericPrint(FILE *of, pCode *pc)
3206 fprintf(of,";%s\n", ((pCodeComment *)pc)->comment);
3210 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
3214 // If the opcode has a label, print that first
3217 pCodeInstruction *pci = PCI(pc);
3218 pBranch *pbl = pci->label;
3219 while(pbl && pbl->pc) {
3220 if(pbl->pc->type == PC_LABEL)
3221 pCodePrintLabel(of, pbl->pc);
3226 genericPrint(of,PCODE(pci->cline));
3229 pCode2str(str, 256, pc);
3231 fprintf(of,"%s",str);
3235 pCodeOpReg *pcor = PCOR(pci->pcop);
3236 fprintf(of, "\t;id=%u,key=%03x",pc->id,pc->seq);
3238 fprintf(of,",flow seq=%03x",pci->pcflow->pc.seq);
3239 if (pcor && pcor->pcop.type==PO_GPR_TEMP && !pcor->r->isFixed)
3240 fprintf(of,",rIdx=r0x%X",pcor->rIdx);
3245 pBranch *dpb = pc->to; // debug
3247 switch ( dpb->pc->type) {
3249 fprintf(of, "\t;%s", PCI(dpb->pc)->mnemonic);
3252 fprintf(of, "\t;label %d", PCL(dpb->pc)->key);
3255 fprintf(of, "\t;function %s", ( (PCF(dpb->pc)->fname) ? (PCF(dpb->pc)->fname) : "[END]"));
3258 fprintf(of, "\t;flow");
3272 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
3273 if(PCW(pc)->pci.label)
3274 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
3276 if(PCW(pc)->operand) {
3277 fprintf(of,";\toperand ");
3278 pCodeOpPrint(of,PCW(pc)->operand );
3284 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
3285 if(PCFL(pc)->ancestor)
3286 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
3292 // fprintf(of,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3293 fprintf(of,"%s\t.line\t%d; \"%s\"\t%s\n", (options.debug?"":";"), PCCS(pc)->line_number, PCCS(pc)->file_name, PCCS(pc)->line);
3298 pBranch *pbl = PCAD(pc)->pci.label;
3299 while(pbl && pbl->pc) {
3300 if(pbl->pc->type == PC_LABEL)
3301 pCodePrintLabel(of, pbl->pc);
3305 if(PCAD(pc)->directive) {
3306 fprintf(of, "\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
3309 /* special case to handle inline labels without tab */
3310 fprintf(of, "%s\n", PCAD(pc)->arg);
3316 fprintf(of,"unknown pCode type %d\n",pc->type);
3320 /*-----------------------------------------------------------------*/
3321 /* pCodePrintFunction - prints function begin/end */
3322 /*-----------------------------------------------------------------*/
3324 static void pCodePrintFunction(FILE *of, pCode *pc)
3330 if( ((pCodeFunction *)pc)->modname)
3331 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
3333 if(PCF(pc)->fname) {
3334 pBranch *exits = PCF(pc)->to;
3336 fprintf(of,"%s\t;Function start\n",PCF(pc)->fname);
3339 exits = exits->next;
3342 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
3345 if((PCF(pc)->from &&
3346 PCF(pc)->from->pc->type == PC_FUNCTION &&
3347 PCF(PCF(pc)->from->pc)->fname) )
3348 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
3350 fprintf(of,"; exit point [can't find entry point]\n");
3353 /*-----------------------------------------------------------------*/
3354 /* pCodePrintLabel - prints label */
3355 /*-----------------------------------------------------------------*/
3357 static void pCodePrintLabel(FILE *of, pCode *pc)
3364 fprintf(of,"%s\n",PCL(pc)->label);
3365 else if (PCL(pc)->key >=0)
3366 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
3368 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
3372 /*-----------------------------------------------------------------*/
3373 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
3374 /* remove it if it is found. */
3375 /*-----------------------------------------------------------------*/
3376 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
3382 if(pcl->type == PC_OPCODE || pcl->type == PC_INLINE || pcl->type == PC_ASMDIR)
3383 b = PCI(pcl)->label;
3385 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
3389 //fprintf (stderr, "%s \n",__FUNCTION__);
3390 //pcl->print(stderr,pcl);
3391 //pc->print(stderr,pc);
3394 //fprintf (stderr, "found label\n");
3398 bprev->next = b->next; /* Not first pCode in chain */
3402 PCI(pcl)->label = b->next; /* First pCode in chain */
3405 return; /* A label can't occur more than once */
3412 /*-----------------------------------------------------------------*/
3413 /*-----------------------------------------------------------------*/
3414 pBranch * pBranchAppend(pBranch *h, pBranch *n)
3433 /*-----------------------------------------------------------------*/
3434 /* pBranchLink - given two pcodes, this function will link them */
3435 /* together through their pBranches */
3436 /*-----------------------------------------------------------------*/
3437 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
3441 // Declare a new branch object for the 'from' pCode.
3443 //_ALLOC(b,sizeof(pBranch));
3444 b = Safe_calloc(1,sizeof(pBranch));
3445 b->pc = PCODE(t); // The link to the 'to' pCode.
3448 f->to = pBranchAppend(f->to,b);
3450 // Now do the same for the 'to' pCode.
3452 //_ALLOC(b,sizeof(pBranch));
3453 b = Safe_calloc(1,sizeof(pBranch));
3457 t->from = pBranchAppend(t->from,b);
3462 /*-----------------------------------------------------------------*/
3463 /* pBranchFind - find the pBranch in a pBranch chain that contains */
3465 /*-----------------------------------------------------------------*/
3466 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
3479 /*-----------------------------------------------------------------*/
3480 /* pCodeUnlink - Unlink the given pCode from its pCode chain. */
3481 /*-----------------------------------------------------------------*/
3482 static void pCodeUnlink(pCode *pc)
3487 if(!pc->prev || !pc->next) {
3488 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
3492 /* first remove the pCode from the chain */
3493 pc->prev->next = pc->next;
3494 pc->next->prev = pc->prev;
3496 /* Now for the hard part... */
3498 /* Remove the branches */
3502 pc1 = pb1->pc; /* Get the pCode that branches to the
3503 * one we're unlinking */
3505 /* search for the link back to this pCode (the one we're
3507 if(pb2 = pBranchFind(pc1->to,pc)) {
3508 pb2->pc = pc->to->pc; // make the replacement
3510 /* if the pCode we're unlinking contains multiple 'to'
3511 * branches (e.g. this a skip instruction) then we need
3512 * to copy these extra branches to the chain. */
3514 pBranchAppend(pb2, pc->to->next);
3523 /*-----------------------------------------------------------------*/
3524 /*-----------------------------------------------------------------*/
3526 static void genericAnalyze(pCode *pc)
3536 // Go through the pCodes that are in pCode chain and link
3537 // them together through the pBranches. Note, the pCodes
3538 // are linked together as a contiguous stream like the
3539 // assembly source code lines. The linking here mimics this
3540 // except that comments are not linked in.
3542 pCode *npc = pc->next;
3544 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
3545 pBranchLink(pc,npc);
3550 /* reached the end of the pcode chain without finding
3551 * an instruction we could link to. */
3555 fprintf(stderr,"analyze PC_FLOW\n");
3559 fprintf(stderr,";A bad pCode is being used\n");
3565 /*-----------------------------------------------------------------*/
3566 /*-----------------------------------------------------------------*/
3567 int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
3571 if(pc->type == PC_LABEL) {
3572 if( ((pCodeLabel *)pc)->key == pcop_label->key)
3575 if(pc->type == PC_OPCODE || pc->type == PC_ASMDIR) {
3576 pbr = PCI(pc)->label;
3578 if(pbr->pc->type == PC_LABEL) {
3579 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
3589 /*-----------------------------------------------------------------*/
3590 /*-----------------------------------------------------------------*/
3591 int checkLabel(pCode *pc)
3595 if(pc && isPCI(pc)) {
3596 pbr = PCI(pc)->label;
3598 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
3608 /*-----------------------------------------------------------------*/
3609 /* findLabelinpBlock - Search the pCode for a particular label */
3610 /*-----------------------------------------------------------------*/
3611 pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
3618 for(pc = pb->pcHead; pc; pc = pc->next)
3619 if(compareLabel(pc,pcop_label))
3625 /*-----------------------------------------------------------------*/
3626 /* findLabel - Search the pCode for a particular label */
3627 /*-----------------------------------------------------------------*/
3628 pCode * findLabel(pCodeOpLabel *pcop_label)
3636 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3637 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
3641 fprintf(stderr,"Couldn't find label %s\n", pcop_label->pcop.name);
3645 /*-----------------------------------------------------------------*/
3646 /* findNextpCode - given a pCode, find the next of type 'pct' */
3647 /* in the linked list */
3648 /*-----------------------------------------------------------------*/
3649 pCode * findNextpCode(pCode *pc, PC_TYPE pct)
3662 /*-----------------------------------------------------------------*/
3663 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
3664 /* in the linked list */
3665 /*-----------------------------------------------------------------*/
3666 pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
3670 if(pc->type == pct) {
3672 static unsigned int stop;
3674 stop++; // Place break point here
3685 /*-----------------------------------------------------------------*/
3686 /* findNextInstruction - given a pCode, find the next instruction */
3687 /* in the linked list */
3688 /*-----------------------------------------------------------------*/
3689 pCode * findNextInstruction(pCode *pci)
3694 if((pc->type == PC_OPCODE)
3695 || (pc->type == PC_WILD)
3696 || (pc->type == PC_ASMDIR))
3700 fprintf(stderr,"findNextInstruction: ");
3701 printpCode(stderr, pc);
3706 //fprintf(stderr,"Couldn't find instruction\n");
3710 /*-----------------------------------------------------------------*/
3711 /* findNextInstruction - given a pCode, find the next instruction */
3712 /* in the linked list */
3713 /*-----------------------------------------------------------------*/
3714 pCode * findPrevInstruction(pCode *pci)
3720 if((pc->type == PC_OPCODE)
3721 || (pc->type == PC_WILD)
3722 || (pc->type == PC_ASMDIR))
3727 fprintf(stderr,"pic16_findPrevInstruction: ");
3728 printpCode(stderr, pc);
3733 //fprintf(stderr,"Couldn't find instruction\n");
3737 /*-----------------------------------------------------------------*/
3738 /* findFunctionEnd - given a pCode find the end of the function */
3739 /* that contains it */
3740 /*-----------------------------------------------------------------*/
3741 pCode * findFunctionEnd(pCode *pc)
3744 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
3750 fprintf(stderr,"Couldn't find function end\n");
3755 /*-----------------------------------------------------------------*/
3756 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
3757 /* instruction with which it is associated. */
3758 /*-----------------------------------------------------------------*/
3759 static void AnalyzeLabel(pCode *pc)
3768 static void AnalyzeGOTO(pCode *pc)
3771 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
3775 static void AnalyzeSKIP(pCode *pc)
3778 pBranchLink(pc,findNextInstruction(pc->next));
3779 pBranchLink(pc,findNextInstruction(pc->next->next));
3783 static void AnalyzeRETURN(pCode *pc)
3786 // branch_link(pc,findFunctionEnd(pc->next));
3792 /*-----------------------------------------------------------------*/
3793 /*-----------------------------------------------------------------*/
3794 regs * getRegFromInstruction(pCode *pc)
3800 PCI(pc)->num_ops == 0 )
3803 switch(PCI(pc)->pcop->type) {
3806 return PCOR(PCI(pc)->pcop)->r;
3810 return PCOR(PCI(pc)->pcop)->r;
3813 r = PCOI(PCI(pc)->pcop)->r;
3816 return dirregWithName(PCI(pc)->pcop->name);
3819 r = PCOR(PCI(pc)->pcop)->r;
3822 return dirregWithName(PCI(pc)->pcop->name);
3824 case PO_GPR_REGISTER:
3826 r = PCOR(PCI(pc)->pcop)->r;
3829 return dirregWithName(PCI(pc)->pcop->name);
3841 /*-----------------------------------------------------------------*/
3842 /*-----------------------------------------------------------------*/
3844 void AnalyzepBlock(pBlock *pb)
3851 /* Find all of the registers used in this pBlock
3852 * by looking at each instruction and examining it's
3855 for(pc = pb->pcHead; pc; pc = pc->next) {
3857 /* Is this an instruction with operands? */
3858 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
3860 if((PCI(pc)->pcop->type == PO_GPR_TEMP)
3861 || ((PCI(pc)->pcop->type == PO_GPR_BIT) && PCOR(PCI(pc)->pcop)->r && (PCOR(PCI(pc)->pcop)->r->pc_type == PO_GPR_TEMP))) {
3863 /* Loop through all of the registers declared so far in
3864 this block and see if we find this one there */
3866 regs *r = setFirstItem(pb->tregisters);
3869 if((r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) && (r->type == PCOR(PCI(pc)->pcop)->r->type)) {
3870 PCOR(PCI(pc)->pcop)->r = r;
3873 r = setNextItem(pb->tregisters);
3877 /* register wasn't found */
3878 //r = Safe_calloc(1, sizeof(regs));
3879 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
3880 //addSet(&pb->tregisters, r);
3881 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
3882 //PCOR(PCI(pc)->pcop)->r = r;
3883 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
3885 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
3888 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
3889 if(PCOR(PCI(pc)->pcop)->r) {
3890 pic14_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
3891 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
3893 if(PCI(pc)->pcop->name)
3894 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
3896 fprintf(stderr,"ERROR: NULL register\n");
3905 /*-----------------------------------------------------------------*/
3907 /*-----------------------------------------------------------------*/
3908 void InsertpFlow(pCode *pc, pCode **pflow)
3911 PCFL(*pflow)->end = pc;
3913 if(!pc || !pc->next)
3916 *pflow = newpCodeFlow();
3917 pCodeInsertAfter(pc, *pflow);
3920 /*-----------------------------------------------------------------*/
3921 /* BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3922 /* the flow blocks. */
3924 * BuildFlow inserts pCodeFlow objects into the pCode chain at each
3925 * point the instruction flow changes.
3927 /*-----------------------------------------------------------------*/
3928 void BuildFlow(pBlock *pb)
3931 pCode *last_pci=NULL;
3938 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
3939 /* Insert a pCodeFlow object at the beginning of a pBlock */
3941 InsertpFlow(pb->pcHead, &pflow);
3943 //pflow = newpCodeFlow(); /* Create a new Flow object */
3944 //pflow->next = pb->pcHead; /* Make the current head the next object */
3945 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
3946 //pb->pcHead = pflow; /* Make the Flow object the head */
3949 for( pc = findNextInstruction(pb->pcHead);
3951 pc=findNextInstruction(pc)) {
3954 PCI(pc)->pcflow = PCFL(pflow);
3956 //fprintf(stderr," build: ");
3957 //pflow->print(stderr,pflow);
3959 if( PCI(pc)->isSkip) {
3961 /* The two instructions immediately following this one
3962 * mark the beginning of a new flow segment */
3964 while(pc && PCI(pc)->isSkip) {
3966 PCI(pc)->pcflow = PCFL(pflow);
3970 InsertpFlow(pc, &pflow);
3971 pc=findNextInstruction(pc->next);
3979 PCI(pc)->pcflow = PCFL(pflow);
3981 InsertpFlow(pc, &pflow);
3983 } else if ( PCI(pc)->isBranch && !checkLabel(findNextInstruction(pc->next))) {
3985 InsertpFlow(pc, &pflow);
3988 } else if (checkLabel(pc)) {
3990 /* This instruction marks the beginning of a
3991 * new flow segment */
3996 /* If the previous pCode is not a flow object, then
3997 * insert a new flow object. (This check prevents
3998 * two consecutive flow objects from being insert in
3999 * the case where a skip instruction preceeds an
4000 * instruction containing a label.) */
4002 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
4003 InsertpFlow(findPrevInstruction(pc->prev), &pflow);
4005 PCI(pc)->pcflow = PCFL(pflow);
4012 //fprintf (stderr,",end seq %d",GpcFlowSeq);
4014 PCFL(pflow)->end = pb->pcTail;
4017 /*-------------------------------------------------------------------*/
4018 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
4019 /* the flow blocks. */
4021 * unBuildFlow removes pCodeFlow objects from a pCode chain
4023 /*-----------------------------------------------------------------*/
4024 void unBuildFlow(pBlock *pb)
4039 if(PCI(pc)->pcflow) {
4040 //free(PCI(pc)->pcflow);
4041 PCI(pc)->pcflow = NULL;
4044 } else if(isPCFL(pc) )
4053 /*-----------------------------------------------------------------*/
4054 /*-----------------------------------------------------------------*/
4055 void dumpCond(int cond)
4058 static char *pcc_str[] = {
4072 int ncond = sizeof(pcc_str) / sizeof(char *);
4075 fprintf(stderr, "0x%04X\n",cond);
4077 for(i=0,j=1; i<ncond; i++, j<<=1)
4079 fprintf(stderr, " %s\n",pcc_str[i]);
4083 /*-----------------------------------------------------------------*/
4084 /*-----------------------------------------------------------------*/
4085 void FlowStats(pCodeFlow *pcflow)
4093 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
4095 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
4098 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
4103 fprintf(stderr, " FlowStats inCond: ");
4104 dumpCond(pcflow->inCond);
4105 fprintf(stderr, " FlowStats outCond: ");
4106 dumpCond(pcflow->outCond);
4110 /*-----------------------------------------------------------------*
4111 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
4112 * if it affects the banking bits.
4114 * return: -1 == Banking bits are unaffected by this pCode.
4116 * return: > 0 == Banking bits are affected.
4118 * If the banking bits are affected, then the returned value describes
4119 * which bits are affected and how they're affected. The lower half
4120 * of the integer maps to the bits that are affected, the upper half
4121 * to whether they're set or cleared.
4123 *-----------------------------------------------------------------*/
4125 #define SET_BANK_BIT (1 << 16)
4126 #define CLR_BANK_BIT 0
4128 static int isBankInstruction(pCode *pc)
4136 if( ( (reg = getRegFromInstruction(pc)) != NULL) && isSTATUS_REG(reg)) {
4138 // Check to see if the register banks are changing
4139 if(PCI(pc)->isModReg) {
4141 pCodeOp *pcop = PCI(pc)->pcop;
4142 switch(PCI(pc)->op) {
4145 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4146 //fprintf(stderr, " isBankInstruction - Set RP0\n");
4147 return SET_BANK_BIT | PIC_RP0_BIT;
4150 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4151 //fprintf(stderr, " isBankInstruction - Set RP1\n");
4152 return CLR_BANK_BIT | PIC_RP0_BIT;
4157 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4158 //fprintf(stderr, " isBankInstruction - Clr RP0\n");
4159 return CLR_BANK_BIT | PIC_RP1_BIT;
4161 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4162 //fprintf(stderr, " isBankInstruction - Clr RP1\n");
4163 return CLR_BANK_BIT | PIC_RP1_BIT;
4167 //fprintf(stderr, " isBankInstruction - Status register is getting Modified by:\n");
4168 //genericPrint(stderr, pc);
4179 /*-----------------------------------------------------------------*/
4180 /*-----------------------------------------------------------------*/
4182 static void FillFlow(pCodeFlow *pcflow)
4190 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
4192 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
4195 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
4202 isBankInstruction(pc);
4204 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
4207 fprintf(stderr, " FillFlow - Bad end of flow\n");
4209 fprintf(stderr, " FillFlow - Ending flow with\n ");
4210 pc->print(stderr,pc);
4213 fprintf(stderr, " FillFlow inCond: ");
4214 dumpCond(pcflow->inCond);
4215 fprintf(stderr, " FillFlow outCond: ");
4216 dumpCond(pcflow->outCond);
4221 /*-----------------------------------------------------------------*/
4222 /*-----------------------------------------------------------------*/
4223 void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
4225 pCodeFlowLink *fromLink, *toLink;
4227 if(!from || !to || !to->pcflow || !from->pcflow)
4230 fromLink = newpCodeFlowLink(from->pcflow);
4231 toLink = newpCodeFlowLink(to->pcflow);
4233 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
4234 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
4238 /*-----------------------------------------------------------------*
4239 * void LinkFlow(pBlock *pb)
4241 * In BuildFlow, the PIC code has been partitioned into contiguous
4242 * non-branching segments. In LinkFlow, we determine the execution
4243 * order of these segments. For example, if one of the segments ends
4244 * with a skip, then we know that there are two possible flow segments
4245 * to which control may be passed.
4246 *-----------------------------------------------------------------*/
4247 void LinkFlow(pBlock *pb)
4253 //fprintf(stderr,"linkflow \n");
4255 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4257 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4260 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
4262 //fprintf(stderr," link: ");
4263 //pcflow->print(stderr,pcflow);
4265 //FillFlow(PCFL(pcflow));
4267 pc = PCFL(pcflow)->end;
4269 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
4270 if(isPCI_SKIP(pc)) {
4271 //fprintf(stderr, "ends with skip\n");
4272 //pc->print(stderr,pc);
4273 pct=findNextInstruction(pc->next);
4274 LinkFlow_pCode(PCI(pc),PCI(pct));
4275 pct=findNextInstruction(pct->next);
4276 LinkFlow_pCode(PCI(pc),PCI(pct));
4280 if(isPCI_BRANCH(pc)) {
4281 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
4283 //fprintf(stderr, "ends with branch\n ");
4284 //pc->print(stderr,pc);
4286 if(!(pcol && isPCOLAB(pcol))) {
4287 if((PCI(pc)->op != POC_RETLW) && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RETFIE) ) {
4288 pc->print(stderr,pc);
4289 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
4294 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
4295 LinkFlow_pCode(PCI(pc),PCI(pct));
4297 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
4298 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
4299 //fprintf(stderr,"newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
4305 //fprintf(stderr, "ends with non-branching instruction:\n");
4306 //pc->print(stderr,pc);
4308 LinkFlow_pCode(PCI(pc),PCI(findNextInstruction(pc->next)));
4314 //fprintf(stderr, "ends with unknown\n");
4315 //pc->print(stderr,pc);
4319 //fprintf(stderr, "ends with nothing: ERROR\n");
4323 /*-----------------------------------------------------------------*/
4324 /*-----------------------------------------------------------------*/
4326 /*-----------------------------------------------------------------*/
4327 /*-----------------------------------------------------------------*/
4328 int isPCinFlow(pCode *pc, pCode *pcflow)
4334 if(!isPCI(pc) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
4337 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
4343 /*-----------------------------------------------------------------*/
4344 /*-----------------------------------------------------------------*/
4346 static void BanksUsedFlow2(pCode *pcflow)
4355 if(!isPCFL(pcflow)) {
4356 fprintf(stderr, "BanksUsed - pcflow is not a flow object ");
4360 pc = findNextInstruction(pcflow->next);
4362 PCFL(pcflow)->lastBank = -1;
4364 while(isPCinFlow(pc,pcflow)) {
4366 int bank_selected = isBankInstruction(pc);
4368 //if(PCI(pc)->pcflow)
4369 //fprintf(stderr,"BanksUsedFlow2, looking at seq %d\n",PCI(pc)->pcflow->pc.seq);
4371 if(bank_selected > 0) {
4372 //fprintf(stderr,"BanksUsed - mucking with bank %d\n",bank_selected);
4374 // This instruction is modifying banking bits before accessing registers
4376 PCFL(pcflow)->firstBank = -1;
4378 if(PCFL(pcflow)->lastBank == -1)
4379 PCFL(pcflow)->lastBank = 0;
4381 bank = (1 << (bank_selected & (PIC_RP0_BIT | PIC_RP1_BIT)));
4382 if(bank_selected & SET_BANK_BIT)
4383 PCFL(pcflow)->lastBank |= bank;
4387 reg = getRegFromInstruction(pc);
4389 if(reg && !isREGinBank(reg, bank)) {
4390 int allbanks = REGallBanks(reg);
4392 PCFL(pcflow)->firstBank = allbanks;
4394 PCFL(pcflow)->lastBank = allbanks;
4401 pc = findNextInstruction(pc->next);
4404 // fprintf(stderr,"BanksUsedFlow2 flow seq=%3d, first bank = 0x%03x, Last bank 0x%03x\n",
4405 // pcflow->seq,PCFL(pcflow)->firstBank,PCFL(pcflow)->lastBank);
4408 /*-----------------------------------------------------------------*/
4409 /*-----------------------------------------------------------------*/
4411 static void BanksUsedFlow(pBlock *pb)
4416 //pb->pcHead->print(stderr, pb->pcHead);
4418 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4419 //pcflow->print(stderr,pcflow);
4421 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4423 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4425 BanksUsedFlow2(pcflow);
4431 /*-----------------------------------------------------------------*/
4432 /* Inserts a new pCodeInstruction before an existing one */
4433 /*-----------------------------------------------------------------*/
4434 static void insertPCodeInstruction(pCodeInstruction *pci, pCodeInstruction *new_pci)
4437 pCodeInsertAfter(pci->pc.prev, &new_pci->pc);
4439 /* Move the label, if there is one */
4442 new_pci->label = pci->label;
4446 /* Move the C code comment, if there is one */
4449 new_pci->cline = pci->cline;
4453 /* The new instruction has the same pcflow block */
4454 new_pci->pcflow = pci->pcflow;
4458 /*-----------------------------------------------------------------*/
4459 /*-----------------------------------------------------------------*/
4460 static void insertBankSwitch(pCodeInstruction *pci, int Set_Clear, int RP_BankBit)
4464 new_pc = newpCode((Set_Clear?POC_BSF:POC_BCF),popCopyGPR2Bit(PCOP(&pc_status),RP_BankBit));
4466 insertPCodeInstruction(pci, PCI(new_pc));
4469 /*-----------------------------------------------------------------*/
4470 /*-----------------------------------------------------------------*/
4471 static void insertBankSel(pCodeInstruction *pci, const char *name)
4475 pCodeOp *pcop = popCopyReg(PCOR(pci->pcop));
4476 pcop->type = PO_GPR_REGISTER; // Sometimes the type is set to legacy 8051 - so override it
4477 if (pcop->name == 0)
4478 pcop->name = strdup(name);
4479 new_pc = newpCode(POC_BANKSEL, pcop);
4481 insertPCodeInstruction(pci, PCI(new_pc));
4484 /*-----------------------------------------------------------------*/
4485 /* If the register is a fixed known addess then we can assign the */
4486 /* bank selection bits. Otherwise the linker is going to assign */
4487 /* the register location and thus has to set bank selection bits */
4488 /* through the banksel directive. */
4489 /* One critical assumption here is that within this C module all */
4490 /* the locally allocated registers are in the same udata sector. */
4491 /* Therefore banksel is only called for external registers or the */
4492 /* first time a local register is encountered. */
4493 /*-----------------------------------------------------------------*/
4494 static int LastRegIdx; /* If the previous register is the same one again then no need to change bank. */
4495 static int BankSelect(pCodeInstruction *pci, int cur_bank, regs *reg)
4498 int a = reg->alias>>7;
4500 return cur_bank; // This register is available in all banks
4501 } else if ((a&1)&&((cur_bank==0)||(cur_bank==1))) {
4502 return cur_bank; // This register is available in banks 0 & 1
4504 if (reg->address&0x80) {
4505 if ((cur_bank==1)||(cur_bank==3)) {
4506 return cur_bank; // This register is available in banks 1 & 3
4509 if ((cur_bank==0)||(cur_bank==1)) {
4510 return cur_bank; // This register is available in banks 0 & 2
4516 if (LastRegIdx == reg->rIdx) // If this is the same register as last time then it is in same bank
4518 LastRegIdx = reg->rIdx;
4522 bank = REG_BANK(reg);
4523 } else if (reg->isExtern) {
4524 bank = 'E'; // Unfixed extern registers are allocated by the linker therefore its bank is unknown
4526 bank = 'L'; // Unfixed local registers are allocated by the linker therefore its bank is unknown
4528 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.
4529 return 'L'; // Local registers are presumed to be in same linker assigned bank
4530 } else if ((bank == 'L')&&(cur_bank != 'L')) { // Reg is now local and linker to assign bank
4531 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4532 } else if (bank == 'E') { // Reg is now extern and linker to assign bank
4533 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4534 } 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
4535 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4536 if (getMaxRam()&0x100)
4537 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4538 } else { // Current bank and new register banks known - can set bank bits
4539 switch((cur_bank^bank) & 3) {
4543 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4546 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4549 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4550 if (getMaxRam()&0x100)
4551 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4559 /*-----------------------------------------------------------------*/
4560 /* Check for bank selection pcodes instructions and modify */
4561 /* cur_bank to match. */
4562 /*-----------------------------------------------------------------*/
4563 static int IsBankChange(pCode *pc, regs *reg, int *cur_bank) {
4565 if (isSTATUS_REG(reg)) {
4567 if (PCI(pc)->op == POC_BCF) {
4568 int old_bank = *cur_bank;
4569 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4570 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4571 if (*cur_bank & ~(0x3))
4574 *cur_bank = *cur_bank&0x2;
4575 LastRegIdx = reg->rIdx;
4576 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4577 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4578 if (*cur_bank & ~(0x3))
4581 *cur_bank = *cur_bank&0x1;
4582 LastRegIdx = reg->rIdx;
4584 return old_bank != *cur_bank;
4587 if (PCI(pc)->op == POC_BSF) {
4588 int old_bank = *cur_bank;
4589 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4590 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4591 if (*cur_bank & ~(0x3))
4594 *cur_bank = (*cur_bank&0x2) | 0x1;
4595 LastRegIdx = reg->rIdx;
4596 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4597 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4598 if (*cur_bank & ~(0x3))
4601 *cur_bank = (*cur_bank&0x1) | 0x2;
4602 LastRegIdx = reg->rIdx;
4604 return old_bank != *cur_bank;
4607 } else if (PCI(pc)->op == POC_BANKSEL) {
4608 int old_bank = *cur_bank;
4609 regs *r = PCOR(PCI(pc)->pcop)->r;
4610 *cur_bank = (!r || r->isExtern) ? 'E' : 'L';
4611 LastRegIdx = reg->rIdx;
4612 return old_bank != *cur_bank;
4618 /*-----------------------------------------------------------------*/
4619 /* Set bank selection if necessary */
4620 /*-----------------------------------------------------------------*/
4621 static int DoBankSelect(pCode *pc, int cur_bank) {
4629 pCode *pcf = findFunction(get_op_from_instruction(PCI(pc)));
4630 LastRegIdx = -1; /* do not know which register is touched in the called function... */
4631 if (pcf && isPCF(pcf)) {
4633 int rbank = 'U'; // Undetermined
4634 FixRegisterBanking(pcf->pb,cur_bank); // Ensure this block has had its banks selection done
4635 // Check all the returns to work out what bank is selected
4636 for (pcfr=pcf->pb->pcHead; pcfr; pcfr=pcfr->next) {
4638 if ((PCI(pcfr)->op==POC_RETURN) || (PCI(pcfr)->op==POC_RETLW)) {
4640 rbank = PCI(pcfr)->pcflow->lastBank;
4642 if (rbank != PCI(pcfr)->pcflow->lastBank)
4643 return -1; // Unknown bank - multiple returns with different banks
4648 return -1; // Unknown bank
4650 } else if (isPCOS(PCI(pc)->pcop) && PCOS(PCI(pc)->pcop)->isPublic) {
4651 /* Extern functions may use registers in different bank - must call banksel */
4652 return -1; /* Unknown bank */
4658 if ((isPCI(pc)) && (PCI(pc)->op == POC_BANKSEL)) {
4659 return -1; /* New bank unknown - linkers choice. */
4662 reg = getRegFromInstruction(pc);
4664 if (IsBankChange(pc,reg,&cur_bank))
4666 if (!isPCI_LIT(pc)) {
4668 /* Examine the instruction before this one to make sure it is
4669 * not a skip type instruction */
4670 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
4672 if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
4673 cur_bank = BankSelect(PCI(pc),cur_bank,reg);
4675 cur_bank = BankSelect(PCI(pcprev),cur_bank,reg);
4677 if (!PCI(pc)->pcflow)
4678 fprintf(stderr,"PCI ID=%d missing flow pointer ???\n",pc->id);
4680 PCI(pc)->pcflow->lastBank = cur_bank; /* Maintain pCodeFlow lastBank state */
4686 /*-----------------------------------------------------------------*/
4687 /*-----------------------------------------------------------------*/
4689 static void FixRegisterBankingInFlow(pCodeFlow *pcfl, int cur_bank)
4697 pc = findNextInstruction(pcfl->pc.next);
4699 while(isPCinFlow(pc,PCODE(pcfl))) {
4701 cur_bank = DoBankSelect(pc,cur_bank);
4703 pc = findNextInstruction(pc->next);
4707 if(pcprev && cur_bank) {
4708 // Set bank state to unknown at the end of each flow block
4714 /*-----------------------------------------------------------------*/
4715 /*int compareBankFlow - compare the banking requirements between */
4717 /*-----------------------------------------------------------------*/
4719 int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
4722 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
4725 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
4728 if(pcflow->firstBank == -1)
4732 if(pcflowLink->pcflow->firstBank == -1) {
4733 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
4734 pcflowLink->pcflow->to :
4735 pcflowLink->pcflow->from);
4736 return compareBankFlow(pcflow, pctl, toORfrom);
4740 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
4743 pcflowLink->bank_conflict++;
4744 pcflowLink->pcflow->FromConflicts++;
4745 pcflow->ToConflicts++;
4748 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
4751 pcflowLink->bank_conflict++;
4752 pcflowLink->pcflow->ToConflicts++;
4753 pcflow->FromConflicts++;
4757 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
4758 pcflowLink->pcflow->pc.seq,
4759 pcflowLink->pcflow->FromConflicts,
4760 pcflowLink->pcflow->ToConflicts);
4766 /*-----------------------------------------------------------------*/
4767 /*-----------------------------------------------------------------*/
4769 void FixBankFlow(pBlock *pb)
4773 pCodeFlowLink *pcfl;
4775 pCode *pcflow_max_To=NULL;
4776 pCode *pcflow_max_From=NULL;
4777 int max_ToConflicts=0;
4778 int max_FromConflicts=0;
4780 /fprintf(stderr,"Fix Bank flow \n");
4781 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4785 First loop through all of the flow objects in this pcode block
4786 and fix the ones that have banking conflicts between the
4790 //fprintf(stderr, "FixBankFlow - Phase 1\n");
4792 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4794 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4796 if(!isPCFL(pcflow)) {
4797 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4801 if(PCFL(pcflow)->firstBank != PCFL(pcflow)->lastBank &&
4802 PCFL(pcflow)->firstBank >= 0 &&
4803 PCFL(pcflow)->lastBank >= 0 ) {
4805 int cur_bank = (PCFL(pcflow)->firstBank < PCFL(pcflow)->lastBank) ?
4806 PCFL(pcflow)->firstBank : PCFL(pcflow)->lastBank;
4808 FixRegisterBankingInFlow(PCFL(pcflow),cur_bank);
4809 BanksUsedFlow2(pcflow);
4814 //fprintf(stderr, "FixBankFlow - Phase 2\n");
4816 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4818 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4823 if(!isPCFL(pcflow)) {
4824 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4828 PCFL(pcflow)->FromConflicts = 0;
4829 PCFL(pcflow)->ToConflicts = 0;
4834 //fprintf(stderr, " FixBankFlow flow seq %d\n",pcflow->seq);
4835 pcfl = setFirstItem(PCFL(pcflow)->from);
4838 pc = PCODE(pcfl->pcflow);
4841 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4842 pc->print(stderr,pc);
4845 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 0);
4848 pcfl=setNextItem(PCFL(pcflow)->from);
4851 if((nFlows >= 2) && nConflicts && (PCFL(pcflow)->firstBank>0)) {
4852 //fprintf(stderr, " From conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4854 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4855 BanksUsedFlow2(pcflow);
4857 continue; / * Don't need to check the flow from here - it's already been fixed * /
4864 pcfl = setFirstItem(PCFL(pcflow)->to);
4867 pc = PCODE(pcfl->pcflow);
4869 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4870 pc->print(stderr,pc);
4873 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 1);
4876 pcfl=setNextItem(PCFL(pcflow)->to);
4879 if((nFlows >= 2) && nConflicts &&(nConflicts != nFlows) && (PCFL(pcflow)->lastBank>0)) {
4880 //fprintf(stderr, " To conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4882 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4883 BanksUsedFlow2(pcflow);
4888 Loop through the flow objects again and find the ones with the
4892 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4894 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4896 if(PCFL(pcflow)->ToConflicts > max_ToConflicts)
4897 pcflow_max_To = pcflow;
4899 if(PCFL(pcflow)->FromConflicts > max_FromConflicts)
4900 pcflow_max_From = pcflow;
4904 fprintf(stderr,"compare flow Max To conflicts: seq %d conflicts %d\n",
4905 PCFL(pcflow_max_To)->pc.seq,
4906 PCFL(pcflow_max_To)->ToConflicts);
4909 fprintf(stderr,"compare flow Max From conflicts: seq %d conflicts %d\n",
4910 PCFL(pcflow_max_From)->pc.seq,
4911 PCFL(pcflow_max_From)->FromConflicts);
4916 /*-----------------------------------------------------------------*/
4917 /*-----------------------------------------------------------------*/
4918 void DumpFlow(pBlock *pb)
4922 pCodeFlowLink *pcfl;
4925 fprintf(stderr,"Dump flow \n");
4926 pb->pcHead->print(stderr, pb->pcHead);
4928 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4929 pcflow->print(stderr,pcflow);
4931 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4933 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4935 if(!isPCFL(pcflow)) {
4936 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
4939 fprintf(stderr,"dumping: ");
4940 pcflow->print(stderr,pcflow);
4941 FlowStats(PCFL(pcflow));
4943 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4945 pc = PCODE(pcfl->pcflow);
4947 fprintf(stderr, " from seq %d:\n",pc->seq);
4949 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
4950 pc->print(stderr,pc);
4955 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4957 pc = PCODE(pcfl->pcflow);
4959 fprintf(stderr, " to seq %d:\n",pc->seq);
4961 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4962 pc->print(stderr,pc);
4971 /*-----------------------------------------------------------------*/
4972 /*-----------------------------------------------------------------*/
4973 int OptimizepBlock(pBlock *pb)
4978 if(!pb || !peepOptimizing)
4981 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
4983 for(pc = pb->pcHead; pc; pc = pc->next)
4984 matches += pCodePeepMatchRule(pc);
4987 pc = findNextInstruction(pb->pcHead);
4995 if(pCodePeepMatchRule(pc)) {
5000 pc = findNextInstruction(pcprev->next);
5002 pc = findNextInstruction(pb->pcHead);
5004 pc = findNextInstruction(pc->next);
5008 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
5013 /*-----------------------------------------------------------------*/
5014 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
5015 /*-----------------------------------------------------------------*/
5016 pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
5020 for(pc = pcs; pc; pc = pc->next) {
5022 if(((pc->type == PC_OPCODE) || (pc->type == PC_INLINE) || (pc->type == PC_ASMDIR)) &&
5024 (PCI(pc)->pcop->type == PO_LABEL) &&
5025 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
5032 /*-----------------------------------------------------------------*/
5033 /*-----------------------------------------------------------------*/
5034 void exchangeLabels(pCodeLabel *pcl, pCode *pc)
5041 (PCI(pc)->pcop->type == PO_LABEL)) {
5043 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
5045 //fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
5047 free(pcol->pcop.name);
5049 /* If the key is negative, then we (probably) have a label to
5050 * a function and the name is already defined */
5053 sprintf(s=buffer,"_%05d_DS_",pcl->key);
5057 //sprintf(buffer,"_%05d_DS_",pcl->key);
5059 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
5061 pcol->pcop.name = Safe_strdup(s);
5062 pcol->key = pcl->key;
5063 //pc->print(stderr,pc);
5070 /*-----------------------------------------------------------------*/
5071 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
5072 /* pCode chain if they're not used. */
5073 /*-----------------------------------------------------------------*/
5074 void pBlockRemoveUnusedLabels(pBlock *pb)
5076 pCode *pc; pCodeLabel *pcl;
5081 for(pc = pb->pcHead; (pc=findNextInstruction(pc->next)) != NULL; ) {
5083 pBranch *pbr = PCI(pc)->label;
5084 if(pbr && pbr->next) {
5085 pCode *pcd = pb->pcHead;
5087 //fprintf(stderr, "multiple labels\n");
5088 //pc->print(stderr,pc);
5093 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
5094 //fprintf(stderr,"Used by:\n");
5095 //pcd->print(stderr,pcd);
5097 exchangeLabels(PCL(pbr->pc),pcd);
5106 for(pc = pb->pcHead; pc; pc = pc->next) {
5108 if(isPCL(pc)) // Label pcode
5110 else if (isPCI(pc) && PCI(pc)->label) // pcode instruction with a label
5111 pcl = PCL(PCI(pc)->label->pc);
5114 //fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
5116 /* This pCode is a label, so search the pBlock to see if anyone
5119 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))) {
5120 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
5121 /* Couldn't find an instruction that refers to this label
5122 * So, unlink the pCode label from it's pCode chain
5123 * and destroy the label */
5124 //fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
5126 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
5127 if(pc->type == PC_LABEL) {
5129 pCodeLabelDestruct(pc);
5131 unlinkpCodeFromBranch(pc, PCODE(pcl));
5132 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
5143 /*-----------------------------------------------------------------*/
5144 /* pBlockMergeLabels - remove the pCode labels from the pCode */
5145 /* chain and put them into pBranches that are */
5146 /* associated with the appropriate pCode */
5148 /*-----------------------------------------------------------------*/
5149 void pBlockMergeLabels(pBlock *pb)
5152 pCode *pc, *pcnext=NULL;
5157 /* First, Try to remove any unused labels */
5158 //pBlockRemoveUnusedLabels(pb);
5160 /* Now loop through the pBlock and merge the labels with the opcodes */
5163 // for(pc = pb->pcHead; pc; pc = pc->next) {
5166 pCode *pcn = pc->next;
5168 if(pc->type == PC_LABEL) {
5170 //fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
5171 //fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
5172 if((pcnext = findNextInstruction(pc) )) {
5174 // Unlink the pCode label from it's pCode chain
5177 //fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
5178 // And link it into the instruction's pBranch labels. (Note, since
5179 // it's possible to have multiple labels associated with one instruction
5180 // we must provide a means to accomodate the additional labels. Thus
5181 // the labels are placed into the singly-linked list "label" as
5182 // opposed to being a single member of the pCodeInstruction.)
5184 //_ALLOC(pbr,sizeof(pBranch));
5185 pbr = Safe_calloc(1,sizeof(pBranch));
5189 PCI(pcnext)->label = pBranchAppend(PCI(pcnext)->label,pbr);
5192 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
5194 } else if(pc->type == PC_CSOURCE) {
5196 /* merge the source line symbolic info into the next instruction */
5197 if((pcnext = findNextInstruction(pc) )) {
5199 // Unlink the pCode label from it's pCode chain
5201 PCI(pcnext)->cline = PCCS(pc);
5202 //fprintf(stderr, "merging CSRC\n");
5203 //genericPrint(stderr,pcnext);
5209 pBlockRemoveUnusedLabels(pb);
5213 /*-----------------------------------------------------------------*/
5214 /*-----------------------------------------------------------------*/
5215 int OptimizepCode(char dbName)
5217 #define MAX_PASSES 4
5226 DFPRINTF((stderr," Optimizing pCode\n"));
5230 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5231 if('*' == dbName || getpBlock_dbName(pb) == dbName)
5232 matches += OptimizepBlock(pb);
5235 while(matches && ++passes < MAX_PASSES);
5240 /*-----------------------------------------------------------------*/
5241 /* popCopyGPR2Bit - copy a pcode operator */
5242 /*-----------------------------------------------------------------*/
5244 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval)
5248 pcop = newpCodeOpBit(pc->name, bitval, 0);
5250 if( !( (pcop->type == PO_LABEL) ||
5251 (pcop->type == PO_LITERAL) ||
5252 (pcop->type == PO_STR) ))
5253 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
5259 /*-----------------------------------------------------------------*/
5260 /*-----------------------------------------------------------------*/
5261 static void FixRegisterBanking(pBlock *pb,int cur_bank)
5264 int firstBank = 'U';
5269 for (pc=pb->pcHead; pc; pc=pc->next) {
5271 firstBank = PCFL(pc)->firstBank;
5275 if (firstBank != 'U') {
5276 /* This block has already been done */
5277 if (firstBank != cur_bank) {
5278 /* This block has started with a different bank - must adjust it */
5279 if ((firstBank != -1)&&(firstBank != 'E')) { /* The first bank start off unknown or extern then need not worry as banksel will be called */
5282 regs *reg = getRegFromInstruction(pc);
5284 DoBankSelect(pc,cur_bank);
5294 /* loop through all of the pCodes within this pblock setting the bank selection, ignoring any branching */
5297 for (pc=pb->pcHead; pc; pc=pc->next) {
5299 PCFL(pc)->firstBank = cur_bank;
5302 cur_bank = DoBankSelect(pc,cur_bank);
5305 /* Trace through branches and set the bank selection as required. */
5308 for (pc=pb->pcHead; pc; pc=pc->next) {
5310 PCFL(pc)->firstBank = cur_bank;
5314 if (PCI(pc)->op == POC_GOTO) {
5315 int lastRegIdx = LastRegIdx;
5317 /* Trace through branch */
5318 pCode *pcl = findLabel(PCOLAB(PCI(pcb)->pcop));
5321 regs *reg = getRegFromInstruction(pcl);
5323 int bankUnknown = -1;
5324 if (IsBankChange(pcl,reg,&bankUnknown)) /* Look for any bank change */
5326 if (cur_bank != DoBankSelect(pcl,cur_bank)) /* Set bank selection if necessary */
5332 LastRegIdx = lastRegIdx;
5334 /* Keep track out current bank */
5335 regs *reg = getRegFromInstruction(pc);
5337 IsBankChange(pc,reg,&cur_bank);
5344 /*-----------------------------------------------------------------*/
5345 /*-----------------------------------------------------------------*/
5346 void pBlockDestruct(pBlock *pb)
5357 /*-----------------------------------------------------------------*/
5358 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
5359 /* name dbName and combine them */
5360 /* into one block */
5361 /*-----------------------------------------------------------------*/
5362 void mergepBlocks(char dbName)
5365 pBlock *pb, *pbmerged = NULL,*pbn;
5367 pb = the_pFile->pbHead;
5369 //fprintf(stderr," merging blocks named %c\n",dbName);
5373 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
5374 if( getpBlock_dbName(pb) == dbName) {
5376 //fprintf(stderr," merged block %c\n",dbName);
5381 addpCode2pBlock(pbmerged, pb->pcHead);
5382 /* addpCode2pBlock doesn't handle the tail: */
5383 pbmerged->pcTail = pb->pcTail;
5385 pb->prev->next = pbn;
5387 pbn->prev = pb->prev;
5392 //printpBlock(stderr, pbmerged);
5399 /*-----------------------------------------------------------------*/
5400 /* AnalyzeFlow - Examine the flow of the code and optimize */
5402 /* level 0 == minimal optimization */
5403 /* optimize registers that are used only by two instructions */
5404 /* level 1 == maximal optimization */
5405 /* optimize by looking at pairs of instructions that use the */
5407 /*-----------------------------------------------------------------*/
5409 void AnalyzeFlow(int level)
5411 static int times_called=0;
5419 /* if this is not the first time this function has been called,
5420 then clean up old flow information */
5421 if(times_called++) {
5422 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5425 RegsUnMapLiveRanges();
5431 /* Phase 2 - Flow Analysis - Register Banking
5433 * In this phase, the individual flow blocks are examined
5434 * and register banking is fixed.
5437 //for(pb = the_pFile->pbHead; pb; pb = pb->next)
5438 //FixRegisterBanking(pb);
5440 /* Phase 2 - Flow Analysis
5442 * In this phase, the pCode is partition into pCodeFlow
5443 * blocks. The flow blocks mark the points where a continuous
5444 * stream of instructions changes flow (e.g. because of
5445 * a call or goto or whatever).
5448 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5452 /* Phase 2 - Flow Analysis - linking flow blocks
5454 * In this phase, the individual flow blocks are examined
5455 * to determine their order of excution.
5458 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5461 /* Phase 3 - Flow Analysis - Flow Tree
5463 * In this phase, the individual flow blocks are examined
5464 * to determine their order of excution.
5467 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5471 /* Phase x - Flow Analysis - Used Banks
5473 * In this phase, the individual flow blocks are examined
5474 * to determine the Register Banks they use
5477 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5481 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5482 pCodeRegMapLiveRanges(pb);
5484 RemoveUnusedRegisters();
5486 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5487 pCodeRegOptimizeRegUsage(level);
5493 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5498 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5500 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5501 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5502 pcflow = pcflow->next) {
5504 FillFlow(PCFL(pcflow));
5509 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5511 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5512 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5513 pcflow = pcflow->next) {
5515 FlowStats(PCFL(pcflow));
5521 /*-----------------------------------------------------------------*/
5522 /* AnalyzeBanking - Called after the memory addresses have been */
5523 /* assigned to the registers. */
5525 /*-----------------------------------------------------------------*/
5527 void AnalyzeBanking(void)
5531 if(!picIsInitialized()) {
5532 setDefMaxRam(); // Max RAM has not been included, so use default setting
5535 /* Phase x - Flow Analysis - Used Banks
5537 * In this phase, the individual flow blocks are examined
5538 * to determine the Register Banks they use
5544 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5545 // BanksUsedFlow(pb);
5546 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5547 FixRegisterBanking(pb,-1); // cur_bank is unknown
5551 /*-----------------------------------------------------------------*/
5552 /*-----------------------------------------------------------------*/
5553 DEFSETFUNC (resetrIdx)
5555 regs *r = (regs *)item;
5563 /*-----------------------------------------------------------------*/
5564 /* InitRegReuse - Initialises variables for code analyzer */
5565 /*-----------------------------------------------------------------*/
5567 void InitReuseReg(void)
5569 /* Find end of statically allocated variables for start idx */
5570 unsigned maxIdx = 0x20; /* Start from begining of GPR. Note may not be 0x20 on some PICs */
5572 for (r = setFirstItem(dynDirectRegs); r; r = setNextItem(dynDirectRegs)) {
5573 if (r->type != REG_SFR) {
5574 maxIdx += r->size; /* Increment for all statically allocated variables */
5578 applyToSet(dynAllocRegs,resetrIdx); /* Reset all rIdx to zero. */
5581 /*-----------------------------------------------------------------*/
5582 /*-----------------------------------------------------------------*/
5583 static unsigned register_reassign(pBlock *pb, unsigned idx)
5587 /* check recursion */
5588 pc = setFirstItem(pb->function_entries);
5594 DFPRINTF((stderr," reassigning registers for function \"%s\"\n",PCF(pc)->fname));
5596 if (pb->tregisters) {
5598 for (r = setFirstItem(pb->tregisters); r; r = setNextItem(pb->tregisters)) {
5599 if (r->type == REG_GPR) {
5601 if (r->rIdx < (int)idx) {
5604 if (peakIdx < idx) peakIdx = idx;
5605 sprintf(s,"r0x%02X", r->rIdx);
5606 DFPRINTF((stderr," reassigning register \"%s\" to \"%s\"\n",r->name,s));
5608 r->name = Safe_strdup(s);
5614 for(pc = setFirstItem(pb->function_calls); pc; pc = setNextItem(pb->function_calls)) {
5616 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5617 char *dest = get_op_from_instruction(PCI(pc));
5619 pCode *pcn = findFunction(dest);
5621 register_reassign(pcn->pb,idx);
5630 /*------------------------------------------------------------------*/
5631 /* ReuseReg were call tree permits */
5633 /* Re-allocate the GPR for optimum reuse for a given pblock */
5634 /* eg if a function m() calls function f1() and f2(), where f1 */
5635 /* allocates a local variable vf1 and f2 allocates a local */
5636 /* variable vf2. Then providing f1 and f2 do not call each other */
5637 /* they may share the same general purpose registers for vf1 and */
5639 /* This is done by first setting the the regs rIdx to start after */
5640 /* all the global variables, then walking through the call tree */
5641 /* renaming the registers to match their new idx and incrementng */
5642 /* it as it goes. If a function has already been called it will */
5643 /* only rename the registers if it has already used up those */
5644 /* registers ie rIdx of the function's registers is lower than the */
5645 /* current rIdx. That way the register will not be reused while */
5646 /* still being used by an eariler function call. */
5648 /* Note for this to work the functions need to be declared static. */
5650 /*------------------------------------------------------------------*/
5655 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5656 /* Non static functions can be called from other modules so their registers must reassign */
5657 if (pb->function_entries&&(PCF(setFirstItem(pb->function_entries))->isPublic||!pb->visited))
5658 register_reassign(pb,peakIdx);
5662 /*-----------------------------------------------------------------*/
5663 /* buildCallTree - look at the flow and extract all of the calls */
5665 /*-----------------------------------------------------------------*/
5667 void buildCallTree(void )
5676 /* Now build the call tree.
5677 First we examine all of the pCodes for functions.
5678 Keep in mind that the function boundaries coincide
5679 with pBlock boundaries.
5681 The algorithm goes something like this:
5682 We have two nested loops. The outer loop iterates
5683 through all of the pBlocks/functions. The inner
5684 loop iterates through all of the pCodes for
5685 a given pBlock. When we begin iterating through
5686 a pBlock, the variable pc_fstart, pCode of the start
5687 of a function, is cleared. We then search for pCodes
5688 of type PC_FUNCTION. When one is encountered, we
5689 initialize pc_fstart to this and at the same time
5690 associate a new pBranch object that signifies a
5691 branch entry. If a return is found, then this signifies
5692 a function exit point. We'll link the pCodes of these
5693 returns to the matching pc_fstart.
5695 When we're done, a doubly linked list of pBranches
5696 will exist. The head of this list is stored in
5697 `the_pFile', which is the meta structure for all
5698 of the pCode. Look at the printCallTree function
5699 on how the pBranches are linked together.
5702 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5703 pCode *pc_fstart=NULL;
5704 for(pc = pb->pcHead; pc; pc = pc->next) {
5706 pCodeFunction *pcf = PCF(pc);
5709 if(STRCASECMP(pcf->fname, "_main") == 0) {
5710 //fprintf(stderr," found main \n");
5711 pb->cmemmap = NULL; /* FIXME do we need to free ? */
5715 pbr = Safe_calloc(1,sizeof(pBranch));
5716 pbr->pc = pc_fstart = pc;
5719 the_pFile->functions = pBranchAppend(the_pFile->functions,pbr);
5721 // Here's a better way of doing the same:
5722 addSet(&pb->function_entries, pc);
5725 // Found an exit point in a function, e.g. return
5726 // (Note, there may be more than one return per function)
5728 pBranchLink(PCF(pc_fstart), pcf);
5730 addSet(&pb->function_exits, pc);
5732 } else if(isCALL(pc)) {
5733 addSet(&pb->function_calls,pc);
5739 /*-----------------------------------------------------------------*/
5740 /* AnalyzepCode - parse the pCode that has been generated and form */
5741 /* all of the logical connections. */
5743 /* Essentially what's done here is that the pCode flow is */
5745 /*-----------------------------------------------------------------*/
5747 void AnalyzepCode(char dbName)
5758 /* Phase 1 - Register allocation and peep hole optimization
5760 * The first part of the analysis is to determine the registers
5761 * that are used in the pCode. Once that is done, the peep rules
5762 * are applied to the code. We continue to loop until no more
5763 * peep rule optimizations are found (or until we exceed the
5764 * MAX_PASSES threshold).
5766 * When done, the required registers will be determined.
5772 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
5774 /* First, merge the labels with the instructions */
5775 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5776 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
5778 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
5779 pBlockMergeLabels(pb);
5782 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName(pb)));
5786 changes = OptimizepCode(dbName);
5788 } while(changes && (i++ < MAX_PASSES));
5793 /*-----------------------------------------------------------------*/
5794 /* ispCodeFunction - returns true if *pc is the pCode of a */
5796 /*-----------------------------------------------------------------*/
5797 bool ispCodeFunction(pCode *pc)
5800 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
5806 /*-----------------------------------------------------------------*/
5807 /* findFunction - Search for a function by name (given the name) */
5808 /* in the set of all functions that are in a pBlock */
5809 /* (note - I expect this to change because I'm planning to limit */
5810 /* pBlock's to just one function declaration */
5811 /*-----------------------------------------------------------------*/
5812 pCode *findFunction(char *fname)
5819 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5821 pc = setFirstItem(pb->function_entries);
5824 if((pc->type == PC_FUNCTION) &&
5826 (strcmp(fname, PCF(pc)->fname)==0))
5829 pc = setNextItem(pb->function_entries);
5837 void MarkUsedRegisters(set *regset)
5842 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
5843 r2 = pic14_regWithIdx(r1->rIdx);
5851 void pBlockStats(FILE *of, pBlock *pb)
5857 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
5859 // for now just print the first element of each set
5860 pc = setFirstItem(pb->function_entries);
5862 fprintf(of,";entry: ");
5865 pc = setFirstItem(pb->function_exits);
5867 fprintf(of,";has an exit\n");
5871 pc = setFirstItem(pb->function_calls);
5873 fprintf(of,";functions called:\n");
5876 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5877 fprintf(of,"; %s\n",get_op_from_instruction(PCI(pc)));
5879 pc = setNextItem(pb->function_calls);
5883 r = setFirstItem(pb->tregisters);
5885 int n = elementsInSet(pb->tregisters);
5887 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
5890 fprintf(of,"; %s\n",r->name);
5891 r = setNextItem(pb->tregisters);
5896 /*-----------------------------------------------------------------*/
5897 /*-----------------------------------------------------------------*/
5899 static void sequencepCode(void)
5905 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5907 pb->seq = GpCodeSequenceNumber+1;
5909 for( pc = pb->pcHead; pc; pc = pc->next)
5910 pc->seq = ++GpCodeSequenceNumber;
5916 /*-----------------------------------------------------------------*/
5917 /*-----------------------------------------------------------------*/
5919 set *register_usage(pBlock *pb)
5922 set *registers=NULL;
5923 set *registersInCallPath = NULL;
5925 / * check recursion * /
5927 pc = setFirstItem(pb->function_entries);
5934 if(pc->type != PC_FUNCTION)
5935 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
5937 pc = setFirstItem(pb->function_calls);
5938 for( ; pc; pc = setNextItem(pb->function_calls)) {
5940 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5941 char *dest = get_op_from_instruction(PCI(pc));
5943 pcn = findFunction(dest);
5945 registersInCallPath = register_usage(pcn->pb);
5947 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5952 pBlockStats(stderr,pb); // debug
5955 // Mark the registers in this block as used.
5957 MarkUsedRegisters(pb->tregisters);
5958 if(registersInCallPath) {
5959 / * registers were used in the functions this pBlock has called * /
5960 / * so now, we need to see if these collide with the ones we are * /
5963 regs *r1,*r2, *newreg;
5965 DFPRINTF((stderr,"comparing registers\n"));
5967 r1 = setFirstItem(registersInCallPath);
5969 if (r1->type != REG_STK) {
5970 r2 = setFirstItem(pb->tregisters);
5972 while(r2 && (r2->type != REG_STK)) {
5974 if(r2->rIdx == r1->rIdx) {
5975 newreg = pic14_findFreeReg(REG_GPR);
5979 DFPRINTF((stderr,"Bummer, no more registers.\n"));
5983 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
5984 r1->rIdx, newreg->rIdx));
5985 r2->rIdx = newreg->rIdx;
5987 r2->name = Safe_strdup(newreg->name);
5991 newreg->wasUsed = 1;
5993 r2 = setNextItem(pb->tregisters);
5997 r1 = setNextItem(registersInCallPath);
6000 / * Collisions have been resolved. Now free the registers in the call path * /
6001 r1 = setFirstItem(registersInCallPath);
6003 newreg = pic14_regWithIdx(r1->rIdx);
6004 if (newreg) newreg->isFree = 1;
6005 r1 = setNextItem(registersInCallPath);
6009 // MarkUsedRegisters(pb->registers);
6011 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
6014 DFPRINTF((stderr,"returning regs\n"));
6016 DFPRINTF((stderr,"not returning regs\n"));
6018 DFPRINTF((stderr,"pBlock after register optim.\n"));
6019 pBlockStats(stderr,pb); // debug
6026 /*-----------------------------------------------------------------*/
6027 /* printCallTree - writes the call tree to a file */
6029 /*-----------------------------------------------------------------*/
6030 void pct2(FILE *of,pBlock *pb,int indent)
6034 // set *registersInCallPath = NULL;
6040 return; //recursion ?
6042 pc = setFirstItem(pb->function_entries);
6049 for(i=0;i<indent;i++) // Indentation
6052 if(pc->type == PC_FUNCTION)
6053 fprintf(of,"%s\n",PCF(pc)->fname);
6058 pc = setFirstItem(pb->function_calls);
6059 for( ; pc; pc = setNextItem(pb->function_calls)) {
6061 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
6062 char *dest = get_op_from_instruction(PCI(pc));
6064 pcn = findFunction(dest);
6066 pct2(of,pcn->pb,indent+1);
6068 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6076 /*-----------------------------------------------------------------*/
6077 /* printCallTree - writes the call tree to a file */
6079 /*-----------------------------------------------------------------*/
6081 void printCallTree(FILE *of)
6093 fprintf(of, "\npBlock statistics\n");
6094 for(pb = the_pFile->pbHead; pb; pb = pb->next )
6099 fprintf(of,"Call Tree\n");
6100 pbr = the_pFile->functions;
6104 if(!ispCodeFunction(pc))
6105 fprintf(of,"bug in call tree");
6108 fprintf(of,"Function: %s\n", PCF(pc)->fname);
6110 while(pc->next && !ispCodeFunction(pc->next)) {
6112 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
6113 fprintf(of,"\t%s\n",get_op_from_instruction(PCI(pc)));
6121 fprintf(of,"\n**************\n\na better call tree\n");
6122 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6127 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6128 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
6134 /*-----------------------------------------------------------------*/
6136 /*-----------------------------------------------------------------*/
6138 void InlineFunction(pBlock *pb)
6146 pc = setFirstItem(pb->function_calls);
6148 for( ; pc; pc = setNextItem(pb->function_calls)) {
6151 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6152 pCode *pcp = pc->prev;
6158 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 */
6160 InlineFunction(pcn->pb);
6163 At this point, *pc points to a CALL mnemonic, and
6164 *pcn points to the function that is being called.
6166 To in-line this call, we need to remove the CALL
6167 and RETURN(s), and link the function pCode in with
6174 /* Check if previous instruction was a bit skip */
6175 if (isPCI_BITSKIP(pcp)) {
6177 /* Invert skip instruction and add a goto */
6178 PCI(pcp)->op = (PCI(pcp)->op == POC_BTFSS) ? POC_BTFSC : POC_BTFSS;
6180 if(isPCL(pc_call->next)) { // Label pcode
6181 pcl = PCL(pc_call->next);
6182 } else if (isPCI(pc_call->next) && PCI(pc_call->next)->label) { // pcode instruction with a label
6183 pcl = PCL(PCI(pc_call->next)->label->pc);
6185 pcl = PCL(newpCodeLabel(NULL, newiTempLabel(NULL)->key+100));
6186 PCI(pc_call->next)->label->pc = (struct pCode*)pcl;
6188 pCodeInsertAfter(pcp, newpCode(POC_GOTO, newpCodeOp(pcl->label,PO_STR)));
6191 /* remove callee pBlock from the pBlock linked list */
6192 removepBlock(pcn->pb);
6200 /* Remove the Function pCode */
6201 pct = findNextInstruction(pcn->next);
6203 /* Link the function with the callee */
6204 if (pcp) pcp->next = pcn->next;
6205 pcn->next->prev = pcp;
6207 /* Convert the function name into a label */
6209 pbr = Safe_calloc(1,sizeof(pBranch));
6210 pbr->pc = newpCodeLabel(PCF(pcn)->fname, -1);
6212 PCI(pct)->label = pBranchAppend(PCI(pct)->label,pbr);
6213 PCI(pct)->label = pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
6215 /* turn all of the return's except the last into goto's */
6216 /* check case for 2 instruction pBlocks */
6217 pce = findNextInstruction(pcn->next);
6219 pCode *pce_next = findNextInstruction(pce->next);
6221 if(pce_next == NULL) {
6222 /* found the last return */
6223 pCode *pc_call_next = findNextInstruction(pc_call->next);
6225 //fprintf(stderr,"found last return\n");
6226 //pce->print(stderr,pce);
6227 pce->prev->next = pc_call->next;
6228 pc_call->next->prev = pce->prev;
6229 PCI(pc_call_next)->label = pBranchAppend(PCI(pc_call_next)->label,
6238 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6244 /*-----------------------------------------------------------------*/
6246 /*-----------------------------------------------------------------*/
6248 void InlinepCode(void)
6257 if(!functionInlining)
6260 /* Loop through all of the function definitions and count the
6261 * number of times each one is called */
6262 //fprintf(stderr,"inlining %d\n",__LINE__);
6264 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6266 pc = setFirstItem(pb->function_calls);
6268 for( ; pc; pc = setNextItem(pb->function_calls)) {
6271 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6272 if(pcn && isPCF(pcn)) {
6273 PCF(pcn)->ncalled++;
6276 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6281 //fprintf(stderr,"inlining %d\n",__LINE__);
6283 /* Now, Loop through the function definitions again, but this
6284 * time inline those functions that have only been called once. */
6286 InlineFunction(the_pFile->pbHead);
6287 //fprintf(stderr,"inlining %d\n",__LINE__);
6289 for(pb = the_pFile->pbHead; pb; pb = pb->next)