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(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(*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(*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 //DFPRINTF((stderr,"pCodeOpCopy bit\n"));
2799 pcopnew = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2800 PCORB(pcopnew)->bit = PCORB(pcop)->bit;
2801 PCORB(pcopnew)->inBitSpace = PCORB(pcop)->inBitSpace;
2806 /* Here we expand the wild card into the appropriate type: */
2807 /* By recursively calling pCodeOpCopy */
2808 //DFPRINTF((stderr,"pCodeOpCopy wild\n"));
2809 if(PCOW(pcop)->matched)
2810 pcopnew = pCodeOpCopy(PCOW(pcop)->matched);
2813 pcopnew = pCodeOpCopy(PCOW(pcop)->subtype);
2814 pcopnew->name = Safe_strdup(PCOW(pcop)->pcwb->vars[PCOW(pcop)->id]);
2815 //DFPRINTF((stderr,"copied a wild op named %s\n",pcopnew->name));
2822 //DFPRINTF((stderr,"pCodeOpCopy label\n"));
2823 pcopnew = Safe_calloc(1,sizeof(pCodeOpLabel) );
2824 PCOLAB(pcopnew)->key = PCOLAB(pcop)->key;
2828 pcopnew = Safe_calloc(1,sizeof(pCodeOpImmd) );
2829 PCOI(pcopnew)->index = PCOI(pcop)->index;
2830 PCOI(pcopnew)->offset = PCOI(pcop)->offset;
2831 PCOI(pcopnew)->_const = PCOI(pcop)->_const;
2832 PCOI(pcopnew)->_function = PCOI(pcop)->_function;
2836 //DFPRINTF((stderr,"pCodeOpCopy lit\n"));
2837 pcopnew = Safe_calloc(1,sizeof(pCodeOpLit) );
2838 PCOL(pcopnew)->lit = PCOL(pcop)->lit;
2843 pcopnew = newpCodeOpBit(pcop->name, PCORB(pcop)->bit,PCORB(pcop)->inBitSpace);
2844 PCOR(pcopnew)->r = PCOR(pcop)->r;
2845 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2846 DFPRINTF((stderr," pCodeOpCopy Bit -register index\n"));
2850 case PO_GPR_POINTER:
2851 case PO_GPR_REGISTER:
2855 //DFPRINTF((stderr,"pCodeOpCopy GPR register\n"));
2856 pcopnew = Safe_calloc(1,sizeof(pCodeOpReg) );
2857 PCOR(pcopnew)->r = PCOR(pcop)->r;
2858 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2859 PCOR(pcopnew)->instance = PCOR(pcop)->instance;
2860 DFPRINTF((stderr," register index %d\n", PCOR(pcop)->r->rIdx));
2864 //fprintf(stderr,"pCodeOpCopy PO_DIR\n");
2865 pcopnew = Safe_calloc(1,sizeof(pCodeOpReg) );
2866 PCOR(pcopnew)->r = PCOR(pcop)->r;
2867 PCOR(pcopnew)->rIdx = PCOR(pcop)->rIdx;
2868 PCOR(pcopnew)->instance = PCOR(pcop)->instance;
2871 DFPRINTF((stderr,"pCodeOpCopy PO_STATUS\n"));
2872 case PO_SFR_REGISTER:
2880 //DFPRINTF((stderr,"pCodeOpCopy register type %d\n", pcop->type));
2881 pcopnew = Safe_calloc(1,sizeof(pCodeOp) );
2885 pcopnew->type = pcop->type;
2887 pcopnew->name = Safe_strdup(pcop->name);
2889 pcopnew->name = NULL;
2894 /*-----------------------------------------------------------------*/
2895 /* popCopyReg - copy a pcode operator */
2896 /*-----------------------------------------------------------------*/
2897 pCodeOp *popCopyReg(pCodeOpReg *pc)
2901 pcor = Safe_calloc(1,sizeof(pCodeOpReg) );
2902 pcor->pcop.type = pc->pcop.type;
2904 if(!(pcor->pcop.name = Safe_strdup(pc->pcop.name)))
2905 fprintf(stderr,"oops %s %d",__FILE__,__LINE__);
2907 pcor->pcop.name = NULL;
2909 if (pcor->pcop.type == PO_IMMEDIATE){
2910 PCOL(pcor)->lit = PCOL(pc)->lit;
2913 pcor->rIdx = pc->rIdx;
2917 //DEBUGpic14_emitcode ("; ***","%s , copying %s, rIdx=%d",__FUNCTION__,pc->pcop.name,pc->rIdx);
2922 /*-----------------------------------------------------------------*/
2923 /* pCodeInstructionCopy - copy a pCodeInstructionCopy */
2924 /*-----------------------------------------------------------------*/
2925 pCode *pCodeInstructionCopy(pCodeInstruction *pci,int invert)
2927 pCodeInstruction *new_pci;
2930 new_pci = PCI(newpCode(pci->inverted_op,pci->pcop));
2932 new_pci = PCI(newpCode(pci->op,pci->pcop));
2934 new_pci->pc.pb = pci->pc.pb;
2935 new_pci->from = pci->from;
2936 new_pci->to = pci->to;
2937 new_pci->label = pci->label;
2938 new_pci->pcflow = pci->pcflow;
2940 return PCODE(new_pci);
2943 /*-----------------------------------------------------------------*/
2944 /*-----------------------------------------------------------------*/
2945 void pCodeDeleteChain(pCode *f,pCode *t)
2950 DFPRINTF((stderr,"delete pCode:\n"));
2952 //f->print(stderr,f);
2953 //f->delete(f); this dumps core...
2958 /*-----------------------------------------------------------------*/
2959 /*-----------------------------------------------------------------*/
2960 void pBlockRegs(FILE *of, pBlock *pb)
2965 r = setFirstItem(pb->tregisters);
2967 r = setNextItem(pb->tregisters);
2972 /*-----------------------------------------------------------------*/
2973 /*-----------------------------------------------------------------*/
2974 char *get_op(pCodeOp *pcop,char *buffer, size_t size)
2979 int use_buffer = 1; // copy the string to the passed buffer pointer
2984 use_buffer = 0; // Don't bother copying the string to the buffer.
2988 switch(pcop->type) {
2992 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
2995 //return PCOR(pcop)->r->name;
2999 if (PCOR(pcop)->r->type == REG_STK)
3000 r = typeRegWithIdx(PCOR(pcop)->r->rIdx,REG_STK,1);
3002 r = pic14_regWithIdx(PCOR(pcop)->r->rIdx);
3005 SAFE_snprintf(&buffer,&size,"%s",r->name);
3014 if(PCOI(pcop)->_const) {
3016 if( PCOI(pcop)->offset >= 0 && PCOI(pcop)->offset<4) {
3017 switch(PCOI(pcop)->offset) {
3019 SAFE_snprintf(&s,&size,"low (%s+%d)",pcop->name, PCOI(pcop)->index);
3022 SAFE_snprintf(&s,&size,"high (%s+%d)",pcop->name, PCOI(pcop)->index);
3025 fprintf (stderr, "PO_IMMEDIATE/_const/offset=%d\n", PCOI(pcop)->offset);
3026 assert ( !"offset too large" );
3027 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
3030 8 * PCOI(pcop)->offset );
3033 SAFE_snprintf(&s,&size,"LOW (%s+%d)",pcop->name,PCOI(pcop)->index);
3035 if( !PCOI(pcop)->offset) { // && PCOI(pcc->pcop)->offset<4) {
3036 SAFE_snprintf(&s,&size,"(%s + %d)",
3040 switch(PCOI(pcop)->offset) {
3042 SAFE_snprintf(&s,&size,"(%s + %d)",pcop->name, PCOI(pcop)->index);
3045 SAFE_snprintf(&s,&size,"high (%s + %d)",pcop->name, PCOI(pcop)->index);
3048 fprintf (stderr, "PO_IMMEDIATE/mutable/offset=%d\n", PCOI(pcop)->offset);
3049 assert ( !"offset too large" );
3050 SAFE_snprintf(&s,&size,"((%s + %d) >> %d)&0xff",pcop->name, PCOI(pcop)->index, 8*PCOI(pcop)->offset);
3060 //size = sizeof(buffer);
3061 if( PCOR(pcop)->instance) {
3062 SAFE_snprintf(&s,&size,"(%s + %d)",
3064 PCOR(pcop)->instance );
3065 //fprintf(stderr,"PO_DIR %s\n",buffer);
3067 SAFE_snprintf(&s,&size,"%s",pcop->name);
3073 if(PCOLAB(pcop)->offset == 1)
3074 SAFE_snprintf(&s,&size,"HIGH(%s)",pcop->name);
3076 SAFE_snprintf(&s,&size,"%s",pcop->name);
3083 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
3086 return PCOR(pcop)->r->name;
3089 /* fall through to the default case */
3093 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
3101 printf("PIC port internal warning: (%s:%d) %s not found\n",
3106 return "NO operand";
3110 /*-----------------------------------------------------------------*/
3111 /*-----------------------------------------------------------------*/
3112 static char *get_op_from_instruction( pCodeInstruction *pcc)
3116 return get_op(pcc->pcop,NULL,0);
3118 return ("ERROR Null: get_op_from_instruction");
3122 /*-----------------------------------------------------------------*/
3123 /*-----------------------------------------------------------------*/
3124 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
3126 fprintf(of,"pcodeopprint- not implemented\n");
3129 /*-----------------------------------------------------------------*/
3130 /* pCode2str - convert a pCode instruction to string */
3131 /*-----------------------------------------------------------------*/
3132 char *pCode2str(char *str, size_t size, pCode *pc)
3140 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
3142 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
3144 if(PCI(pc)->isBitInst) {
3145 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3146 char *name = PCI(pc)->pcop->name;
3148 name = PCOR(PCI(pc)->pcop)->r->name;
3149 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
3150 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)", name, name);
3152 SAFE_snprintf(&s,&size,"%s,%d", name,
3153 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit)&7);
3154 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3155 SAFE_snprintf(&s,&size,"%s,%d", get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
3157 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", get_op_from_instruction(PCI(pc)));
3158 //PCI(pc)->pcop->t.bit );
3160 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
3161 if( PCI(pc)->num_ops == 2)
3162 SAFE_snprintf(&s,&size,"(%s >> 3),%c",get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
3164 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",get_op_from_instruction(PCI(pc)));
3166 SAFE_snprintf(&s,&size,"%s",get_op_from_instruction(PCI(pc)));
3167 if( PCI(pc)->num_ops == 2)
3168 SAFE_snprintf(&s,&size,",%c", ( (PCI(pc)->isModReg) ? 'F':'W'));
3175 /* assuming that comment ends with a \n */
3176 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
3180 /* assuming that inline code ends with a \n */
3181 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
3185 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
3188 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
3191 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
3194 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
3197 SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3200 if(PCAD(pc)->directive) {
3201 SAFE_snprintf(&s,&size,"\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
3202 } else if(PCAD(pc)->arg) {
3203 /* special case to handle inline labels without a tab */
3204 SAFE_snprintf(&s,&size,"%s\n", PCAD(pc)->arg);
3209 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
3215 /*-----------------------------------------------------------------*/
3216 /* genericPrint - the contents of a pCode to a file */
3217 /*-----------------------------------------------------------------*/
3218 static void genericPrint(FILE *of, pCode *pc)
3225 fprintf(of,";%s\n", ((pCodeComment *)pc)->comment);
3229 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
3233 // If the opcode has a label, print that first
3236 pCodeInstruction *pci = PCI(pc);
3237 pBranch *pbl = pci->label;
3238 while(pbl && pbl->pc) {
3239 if(pbl->pc->type == PC_LABEL)
3240 pCodePrintLabel(of, pbl->pc);
3245 genericPrint(of,PCODE(pci->cline));
3248 pCode2str(str, 256, pc);
3250 fprintf(of,"%s",str);
3254 pCodeOpReg *pcor = PCOR(pci->pcop);
3255 fprintf(of, "\t;id=%u,key=%03x",pc->id,pc->seq);
3257 fprintf(of,",flow seq=%03x",pci->pcflow->pc.seq);
3258 if (pcor && pcor->pcop.type==PO_GPR_TEMP && !pcor->r->isFixed)
3259 fprintf(of,",rIdx=r0x%X",pcor->rIdx);
3264 pBranch *dpb = pc->to; // debug
3266 switch ( dpb->pc->type) {
3268 fprintf(of, "\t;%s", PCI(dpb->pc)->mnemonic);
3271 fprintf(of, "\t;label %d", PCL(dpb->pc)->key);
3274 fprintf(of, "\t;function %s", ( (PCF(dpb->pc)->fname) ? (PCF(dpb->pc)->fname) : "[END]"));
3277 fprintf(of, "\t;flow");
3291 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
3292 if(PCW(pc)->pci.label)
3293 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
3295 if(PCW(pc)->operand) {
3296 fprintf(of,";\toperand ");
3297 pCodeOpPrint(of,PCW(pc)->operand );
3303 fprintf(of,";<>Start of new flow, seq=0x%x",pc->seq);
3304 if(PCFL(pc)->ancestor)
3305 fprintf(of," ancestor = 0x%x", PCODE(PCFL(pc)->ancestor)->seq);
3311 fprintf(of,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
3316 pBranch *pbl = PCAD(pc)->pci.label;
3317 while(pbl && pbl->pc) {
3318 if(pbl->pc->type == PC_LABEL)
3319 pCodePrintLabel(of, pbl->pc);
3323 if(PCAD(pc)->directive) {
3324 fprintf(of, "\t%s%s%s\n", PCAD(pc)->directive, PCAD(pc)->arg?"\t":"", PCAD(pc)->arg?PCAD(pc)->arg:"");
3327 /* special case to handle inline labels without tab */
3328 fprintf(of, "%s\n", PCAD(pc)->arg);
3334 fprintf(of,"unknown pCode type %d\n",pc->type);
3338 /*-----------------------------------------------------------------*/
3339 /* pCodePrintFunction - prints function begin/end */
3340 /*-----------------------------------------------------------------*/
3342 static void pCodePrintFunction(FILE *of, pCode *pc)
3348 if( ((pCodeFunction *)pc)->modname)
3349 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
3351 if(PCF(pc)->fname) {
3352 pBranch *exits = PCF(pc)->to;
3354 fprintf(of,"%s\t;Function start\n",PCF(pc)->fname);
3357 exits = exits->next;
3360 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
3363 if((PCF(pc)->from &&
3364 PCF(pc)->from->pc->type == PC_FUNCTION &&
3365 PCF(PCF(pc)->from->pc)->fname) )
3366 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
3368 fprintf(of,"; exit point [can't find entry point]\n");
3371 /*-----------------------------------------------------------------*/
3372 /* pCodePrintLabel - prints label */
3373 /*-----------------------------------------------------------------*/
3375 static void pCodePrintLabel(FILE *of, pCode *pc)
3382 fprintf(of,"%s\n",PCL(pc)->label);
3383 else if (PCL(pc)->key >=0)
3384 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
3386 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
3390 /*-----------------------------------------------------------------*/
3391 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
3392 /* remove it if it is found. */
3393 /*-----------------------------------------------------------------*/
3394 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
3400 if(pcl->type == PC_OPCODE || pcl->type == PC_INLINE || pcl->type == PC_ASMDIR)
3401 b = PCI(pcl)->label;
3403 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
3407 //fprintf (stderr, "%s \n",__FUNCTION__);
3408 //pcl->print(stderr,pcl);
3409 //pc->print(stderr,pc);
3412 //fprintf (stderr, "found label\n");
3416 bprev->next = b->next; /* Not first pCode in chain */
3420 PCI(pcl)->label = b->next; /* First pCode in chain */
3423 return; /* A label can't occur more than once */
3430 /*-----------------------------------------------------------------*/
3431 /*-----------------------------------------------------------------*/
3432 pBranch * pBranchAppend(pBranch *h, pBranch *n)
3451 /*-----------------------------------------------------------------*/
3452 /* pBranchLink - given two pcodes, this function will link them */
3453 /* together through their pBranches */
3454 /*-----------------------------------------------------------------*/
3455 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
3459 // Declare a new branch object for the 'from' pCode.
3461 //_ALLOC(b,sizeof(pBranch));
3462 b = Safe_calloc(1,sizeof(pBranch));
3463 b->pc = PCODE(t); // The link to the 'to' pCode.
3466 f->to = pBranchAppend(f->to,b);
3468 // Now do the same for the 'to' pCode.
3470 //_ALLOC(b,sizeof(pBranch));
3471 b = Safe_calloc(1,sizeof(pBranch));
3475 t->from = pBranchAppend(t->from,b);
3480 /*-----------------------------------------------------------------*/
3481 /* pBranchFind - find the pBranch in a pBranch chain that contains */
3483 /*-----------------------------------------------------------------*/
3484 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
3497 /*-----------------------------------------------------------------*/
3498 /* pCodeUnlink - Unlink the given pCode from its pCode chain. */
3499 /*-----------------------------------------------------------------*/
3500 static void pCodeUnlink(pCode *pc)
3505 if(!pc->prev || !pc->next) {
3506 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
3510 /* first remove the pCode from the chain */
3511 pc->prev->next = pc->next;
3512 pc->next->prev = pc->prev;
3514 /* Now for the hard part... */
3516 /* Remove the branches */
3520 pc1 = pb1->pc; /* Get the pCode that branches to the
3521 * one we're unlinking */
3523 /* search for the link back to this pCode (the one we're
3525 if(pb2 = pBranchFind(pc1->to,pc)) {
3526 pb2->pc = pc->to->pc; // make the replacement
3528 /* if the pCode we're unlinking contains multiple 'to'
3529 * branches (e.g. this a skip instruction) then we need
3530 * to copy these extra branches to the chain. */
3532 pBranchAppend(pb2, pc->to->next);
3541 /*-----------------------------------------------------------------*/
3542 /*-----------------------------------------------------------------*/
3544 static void genericAnalyze(pCode *pc)
3554 // Go through the pCodes that are in pCode chain and link
3555 // them together through the pBranches. Note, the pCodes
3556 // are linked together as a contiguous stream like the
3557 // assembly source code lines. The linking here mimics this
3558 // except that comments are not linked in.
3560 pCode *npc = pc->next;
3562 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
3563 pBranchLink(pc,npc);
3568 /* reached the end of the pcode chain without finding
3569 * an instruction we could link to. */
3573 fprintf(stderr,"analyze PC_FLOW\n");
3577 fprintf(stderr,";A bad pCode is being used\n");
3583 /*-----------------------------------------------------------------*/
3584 /*-----------------------------------------------------------------*/
3585 int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
3589 if(pc->type == PC_LABEL) {
3590 if( ((pCodeLabel *)pc)->key == pcop_label->key)
3593 if(pc->type == PC_OPCODE || pc->type == PC_ASMDIR) {
3594 pbr = PCI(pc)->label;
3596 if(pbr->pc->type == PC_LABEL) {
3597 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
3607 /*-----------------------------------------------------------------*/
3608 /*-----------------------------------------------------------------*/
3609 int checkLabel(pCode *pc)
3613 if(pc && isPCI(pc)) {
3614 pbr = PCI(pc)->label;
3616 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
3626 /*-----------------------------------------------------------------*/
3627 /* findLabelinpBlock - Search the pCode for a particular label */
3628 /*-----------------------------------------------------------------*/
3629 pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
3636 for(pc = pb->pcHead; pc; pc = pc->next)
3637 if(compareLabel(pc,pcop_label))
3643 /*-----------------------------------------------------------------*/
3644 /* findLabel - Search the pCode for a particular label */
3645 /*-----------------------------------------------------------------*/
3646 pCode * findLabel(pCodeOpLabel *pcop_label)
3654 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3655 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
3659 fprintf(stderr,"Couldn't find label %s\n", pcop_label->pcop.name);
3663 /*-----------------------------------------------------------------*/
3664 /* findNextpCode - given a pCode, find the next of type 'pct' */
3665 /* in the linked list */
3666 /*-----------------------------------------------------------------*/
3667 pCode * findNextpCode(pCode *pc, PC_TYPE pct)
3680 /*-----------------------------------------------------------------*/
3681 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
3682 /* in the linked list */
3683 /*-----------------------------------------------------------------*/
3684 pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
3688 if(pc->type == pct) {
3690 static unsigned int stop;
3692 stop++; // Place break point here
3703 /*-----------------------------------------------------------------*/
3704 /* findNextInstruction - given a pCode, find the next instruction */
3705 /* in the linked list */
3706 /*-----------------------------------------------------------------*/
3707 pCode * findNextInstruction(pCode *pci)
3712 if((pc->type == PC_OPCODE)
3713 || (pc->type == PC_WILD)
3714 || (pc->type == PC_ASMDIR))
3718 fprintf(stderr,"findNextInstruction: ");
3719 printpCode(stderr, pc);
3724 //fprintf(stderr,"Couldn't find instruction\n");
3728 /*-----------------------------------------------------------------*/
3729 /* findNextInstruction - given a pCode, find the next instruction */
3730 /* in the linked list */
3731 /*-----------------------------------------------------------------*/
3732 pCode * findPrevInstruction(pCode *pci)
3738 if((pc->type == PC_OPCODE)
3739 || (pc->type == PC_WILD)
3740 || (pc->type == PC_ASMDIR))
3745 fprintf(stderr,"pic16_findPrevInstruction: ");
3746 printpCode(stderr, pc);
3751 //fprintf(stderr,"Couldn't find instruction\n");
3755 /*-----------------------------------------------------------------*/
3756 /* findFunctionEnd - given a pCode find the end of the function */
3757 /* that contains it */
3758 /*-----------------------------------------------------------------*/
3759 pCode * findFunctionEnd(pCode *pc)
3762 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
3768 fprintf(stderr,"Couldn't find function end\n");
3773 /*-----------------------------------------------------------------*/
3774 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
3775 /* instruction with which it is associated. */
3776 /*-----------------------------------------------------------------*/
3777 static void AnalyzeLabel(pCode *pc)
3786 static void AnalyzeGOTO(pCode *pc)
3789 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
3793 static void AnalyzeSKIP(pCode *pc)
3796 pBranchLink(pc,findNextInstruction(pc->next));
3797 pBranchLink(pc,findNextInstruction(pc->next->next));
3801 static void AnalyzeRETURN(pCode *pc)
3804 // branch_link(pc,findFunctionEnd(pc->next));
3810 /*-----------------------------------------------------------------*/
3811 /*-----------------------------------------------------------------*/
3812 regs * getRegFromInstruction(pCode *pc)
3818 PCI(pc)->num_ops == 0 )
3821 switch(PCI(pc)->pcop->type) {
3824 return PCOR(PCI(pc)->pcop)->r;
3828 return PCOR(PCI(pc)->pcop)->r;
3831 r = PCOI(PCI(pc)->pcop)->r;
3834 return dirregWithName(PCI(pc)->pcop->name);
3837 r = PCOR(PCI(pc)->pcop)->r;
3840 return dirregWithName(PCI(pc)->pcop->name);
3842 case PO_GPR_REGISTER:
3844 r = PCOR(PCI(pc)->pcop)->r;
3847 return dirregWithName(PCI(pc)->pcop->name);
3859 /*-----------------------------------------------------------------*/
3860 /*-----------------------------------------------------------------*/
3862 void AnalyzepBlock(pBlock *pb)
3869 /* Find all of the registers used in this pBlock
3870 * by looking at each instruction and examining it's
3873 for(pc = pb->pcHead; pc; pc = pc->next) {
3875 /* Is this an instruction with operands? */
3876 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
3878 if((PCI(pc)->pcop->type == PO_GPR_TEMP)
3879 || ((PCI(pc)->pcop->type == PO_GPR_BIT) && PCOR(PCI(pc)->pcop)->r && (PCOR(PCI(pc)->pcop)->r->pc_type == PO_GPR_TEMP))) {
3881 /* Loop through all of the registers declared so far in
3882 this block and see if we find this one there */
3884 regs *r = setFirstItem(pb->tregisters);
3887 if((r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) && (r->type == PCOR(PCI(pc)->pcop)->r->type)) {
3888 PCOR(PCI(pc)->pcop)->r = r;
3891 r = setNextItem(pb->tregisters);
3895 /* register wasn't found */
3896 //r = Safe_calloc(1, sizeof(regs));
3897 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
3898 //addSet(&pb->tregisters, r);
3899 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
3900 //PCOR(PCI(pc)->pcop)->r = r;
3901 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
3903 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
3906 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
3907 if(PCOR(PCI(pc)->pcop)->r) {
3908 pic14_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
3909 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
3911 if(PCI(pc)->pcop->name)
3912 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
3914 fprintf(stderr,"ERROR: NULL register\n");
3923 /*-----------------------------------------------------------------*/
3925 /*-----------------------------------------------------------------*/
3926 void InsertpFlow(pCode *pc, pCode **pflow)
3929 PCFL(*pflow)->end = pc;
3931 if(!pc || !pc->next)
3934 *pflow = newpCodeFlow();
3935 pCodeInsertAfter(pc, *pflow);
3938 /*-----------------------------------------------------------------*/
3939 /* BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3940 /* the flow blocks. */
3942 * BuildFlow inserts pCodeFlow objects into the pCode chain at each
3943 * point the instruction flow changes.
3945 /*-----------------------------------------------------------------*/
3946 void BuildFlow(pBlock *pb)
3949 pCode *last_pci=NULL;
3956 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
3957 /* Insert a pCodeFlow object at the beginning of a pBlock */
3959 InsertpFlow(pb->pcHead, &pflow);
3961 //pflow = newpCodeFlow(); /* Create a new Flow object */
3962 //pflow->next = pb->pcHead; /* Make the current head the next object */
3963 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
3964 //pb->pcHead = pflow; /* Make the Flow object the head */
3967 for( pc = findNextInstruction(pb->pcHead);
3969 pc=findNextInstruction(pc)) {
3972 PCI(pc)->pcflow = PCFL(pflow);
3974 //fprintf(stderr," build: ");
3975 //pflow->print(stderr,pflow);
3977 if( PCI(pc)->isSkip) {
3979 /* The two instructions immediately following this one
3980 * mark the beginning of a new flow segment */
3982 while(pc && PCI(pc)->isSkip) {
3984 PCI(pc)->pcflow = PCFL(pflow);
3988 InsertpFlow(pc, &pflow);
3989 pc=findNextInstruction(pc->next);
3997 PCI(pc)->pcflow = PCFL(pflow);
3999 InsertpFlow(pc, &pflow);
4001 } else if ( PCI(pc)->isBranch && !checkLabel(findNextInstruction(pc->next))) {
4003 InsertpFlow(pc, &pflow);
4006 } else if (checkLabel(pc)) {
4008 /* This instruction marks the beginning of a
4009 * new flow segment */
4014 /* If the previous pCode is not a flow object, then
4015 * insert a new flow object. (This check prevents
4016 * two consecutive flow objects from being insert in
4017 * the case where a skip instruction preceeds an
4018 * instruction containing a label.) */
4020 if(last_pci && (PCI(last_pci)->pcflow == PCFL(pflow)))
4021 InsertpFlow(findPrevInstruction(pc->prev), &pflow);
4023 PCI(pc)->pcflow = PCFL(pflow);
4030 //fprintf (stderr,",end seq %d",GpcFlowSeq);
4032 PCFL(pflow)->end = pb->pcTail;
4035 /*-------------------------------------------------------------------*/
4036 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
4037 /* the flow blocks. */
4039 * unBuildFlow removes pCodeFlow objects from a pCode chain
4041 /*-----------------------------------------------------------------*/
4042 void unBuildFlow(pBlock *pb)
4057 if(PCI(pc)->pcflow) {
4058 //free(PCI(pc)->pcflow);
4059 PCI(pc)->pcflow = NULL;
4062 } else if(isPCFL(pc) )
4071 /*-----------------------------------------------------------------*/
4072 /*-----------------------------------------------------------------*/
4073 void dumpCond(int cond)
4076 static char *pcc_str[] = {
4090 int ncond = sizeof(pcc_str) / sizeof(char *);
4093 fprintf(stderr, "0x%04X\n",cond);
4095 for(i=0,j=1; i<ncond; i++, j<<=1)
4097 fprintf(stderr, " %s\n",pcc_str[i]);
4101 /*-----------------------------------------------------------------*/
4102 /*-----------------------------------------------------------------*/
4103 void FlowStats(pCodeFlow *pcflow)
4111 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
4113 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
4116 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
4121 fprintf(stderr, " FlowStats inCond: ");
4122 dumpCond(pcflow->inCond);
4123 fprintf(stderr, " FlowStats outCond: ");
4124 dumpCond(pcflow->outCond);
4128 /*-----------------------------------------------------------------*
4129 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
4130 * if it affects the banking bits.
4132 * return: -1 == Banking bits are unaffected by this pCode.
4134 * return: > 0 == Banking bits are affected.
4136 * If the banking bits are affected, then the returned value describes
4137 * which bits are affected and how they're affected. The lower half
4138 * of the integer maps to the bits that are affected, the upper half
4139 * to whether they're set or cleared.
4141 *-----------------------------------------------------------------*/
4143 #define SET_BANK_BIT (1 << 16)
4144 #define CLR_BANK_BIT 0
4146 static int isBankInstruction(pCode *pc)
4154 if( ( (reg = getRegFromInstruction(pc)) != NULL) && isSTATUS_REG(reg)) {
4156 // Check to see if the register banks are changing
4157 if(PCI(pc)->isModReg) {
4159 pCodeOp *pcop = PCI(pc)->pcop;
4160 switch(PCI(pc)->op) {
4163 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4164 //fprintf(stderr, " isBankInstruction - Set RP0\n");
4165 return SET_BANK_BIT | PIC_RP0_BIT;
4168 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4169 //fprintf(stderr, " isBankInstruction - Set RP1\n");
4170 return CLR_BANK_BIT | PIC_RP0_BIT;
4175 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
4176 //fprintf(stderr, " isBankInstruction - Clr RP0\n");
4177 return CLR_BANK_BIT | PIC_RP1_BIT;
4179 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
4180 //fprintf(stderr, " isBankInstruction - Clr RP1\n");
4181 return CLR_BANK_BIT | PIC_RP1_BIT;
4185 //fprintf(stderr, " isBankInstruction - Status register is getting Modified by:\n");
4186 //genericPrint(stderr, pc);
4197 /*-----------------------------------------------------------------*/
4198 /*-----------------------------------------------------------------*/
4200 static void FillFlow(pCodeFlow *pcflow)
4208 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
4210 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
4213 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
4220 isBankInstruction(pc);
4222 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
4225 fprintf(stderr, " FillFlow - Bad end of flow\n");
4227 fprintf(stderr, " FillFlow - Ending flow with\n ");
4228 pc->print(stderr,pc);
4231 fprintf(stderr, " FillFlow inCond: ");
4232 dumpCond(pcflow->inCond);
4233 fprintf(stderr, " FillFlow outCond: ");
4234 dumpCond(pcflow->outCond);
4239 /*-----------------------------------------------------------------*/
4240 /*-----------------------------------------------------------------*/
4241 void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
4243 pCodeFlowLink *fromLink, *toLink;
4245 if(!from || !to || !to->pcflow || !from->pcflow)
4248 fromLink = newpCodeFlowLink(from->pcflow);
4249 toLink = newpCodeFlowLink(to->pcflow);
4251 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
4252 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
4256 /*-----------------------------------------------------------------*
4257 * void LinkFlow(pBlock *pb)
4259 * In BuildFlow, the PIC code has been partitioned into contiguous
4260 * non-branching segments. In LinkFlow, we determine the execution
4261 * order of these segments. For example, if one of the segments ends
4262 * with a skip, then we know that there are two possible flow segments
4263 * to which control may be passed.
4264 *-----------------------------------------------------------------*/
4265 void LinkFlow(pBlock *pb)
4271 //fprintf(stderr,"linkflow \n");
4273 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4275 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4278 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
4280 //fprintf(stderr," link: ");
4281 //pcflow->print(stderr,pcflow);
4283 //FillFlow(PCFL(pcflow));
4285 pc = PCFL(pcflow)->end;
4287 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
4288 if(isPCI_SKIP(pc)) {
4289 //fprintf(stderr, "ends with skip\n");
4290 //pc->print(stderr,pc);
4291 pct=findNextInstruction(pc->next);
4292 LinkFlow_pCode(PCI(pc),PCI(pct));
4293 pct=findNextInstruction(pct->next);
4294 LinkFlow_pCode(PCI(pc),PCI(pct));
4298 if(isPCI_BRANCH(pc)) {
4299 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
4301 //fprintf(stderr, "ends with branch\n ");
4302 //pc->print(stderr,pc);
4304 if(!(pcol && isPCOLAB(pcol))) {
4305 if((PCI(pc)->op != POC_RETLW) && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL) && (PCI(pc)->op != POC_RETFIE) ) {
4306 pc->print(stderr,pc);
4307 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
4312 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
4313 LinkFlow_pCode(PCI(pc),PCI(pct));
4315 fprintf(stderr, "ERROR: %s, couldn't find label. key=%d,lab=%s\n",
4316 __FUNCTION__,pcol->key,((PCOP(pcol)->name)?PCOP(pcol)->name:"-"));
4317 //fprintf(stderr,"newpCodeOpLabel: key=%d, name=%s\n",key,((s)?s:""));
4323 //fprintf(stderr, "ends with non-branching instruction:\n");
4324 //pc->print(stderr,pc);
4326 LinkFlow_pCode(PCI(pc),PCI(findNextInstruction(pc->next)));
4332 //fprintf(stderr, "ends with unknown\n");
4333 //pc->print(stderr,pc);
4337 //fprintf(stderr, "ends with nothing: ERROR\n");
4341 /*-----------------------------------------------------------------*/
4342 /*-----------------------------------------------------------------*/
4344 /*-----------------------------------------------------------------*/
4345 /*-----------------------------------------------------------------*/
4346 int isPCinFlow(pCode *pc, pCode *pcflow)
4352 if(!isPCI(pc) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
4355 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
4361 /*-----------------------------------------------------------------*/
4362 /*-----------------------------------------------------------------*/
4364 static void BanksUsedFlow2(pCode *pcflow)
4373 if(!isPCFL(pcflow)) {
4374 fprintf(stderr, "BanksUsed - pcflow is not a flow object ");
4378 pc = findNextInstruction(pcflow->next);
4380 PCFL(pcflow)->lastBank = -1;
4382 while(isPCinFlow(pc,pcflow)) {
4384 int bank_selected = isBankInstruction(pc);
4386 //if(PCI(pc)->pcflow)
4387 //fprintf(stderr,"BanksUsedFlow2, looking at seq %d\n",PCI(pc)->pcflow->pc.seq);
4389 if(bank_selected > 0) {
4390 //fprintf(stderr,"BanksUsed - mucking with bank %d\n",bank_selected);
4392 // This instruction is modifying banking bits before accessing registers
4394 PCFL(pcflow)->firstBank = -1;
4396 if(PCFL(pcflow)->lastBank == -1)
4397 PCFL(pcflow)->lastBank = 0;
4399 bank = (1 << (bank_selected & (PIC_RP0_BIT | PIC_RP1_BIT)));
4400 if(bank_selected & SET_BANK_BIT)
4401 PCFL(pcflow)->lastBank |= bank;
4405 reg = getRegFromInstruction(pc);
4407 if(reg && !isREGinBank(reg, bank)) {
4408 int allbanks = REGallBanks(reg);
4410 PCFL(pcflow)->firstBank = allbanks;
4412 PCFL(pcflow)->lastBank = allbanks;
4419 pc = findNextInstruction(pc->next);
4422 // fprintf(stderr,"BanksUsedFlow2 flow seq=%3d, first bank = 0x%03x, Last bank 0x%03x\n",
4423 // pcflow->seq,PCFL(pcflow)->firstBank,PCFL(pcflow)->lastBank);
4426 /*-----------------------------------------------------------------*/
4427 /*-----------------------------------------------------------------*/
4429 static void BanksUsedFlow(pBlock *pb)
4434 //pb->pcHead->print(stderr, pb->pcHead);
4436 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4437 //pcflow->print(stderr,pcflow);
4439 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4441 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4443 BanksUsedFlow2(pcflow);
4449 /*-----------------------------------------------------------------*/
4450 /* Inserts a new pCodeInstruction before an existing one */
4451 /*-----------------------------------------------------------------*/
4452 static void insertPCodeInstruction(pCodeInstruction *pci, pCodeInstruction *new_pci)
4455 pCodeInsertAfter(pci->pc.prev, &new_pci->pc);
4457 /* Move the label, if there is one */
4460 new_pci->label = pci->label;
4464 /* Move the C code comment, if there is one */
4467 new_pci->cline = pci->cline;
4471 /* The new instruction has the same pcflow block */
4472 new_pci->pcflow = pci->pcflow;
4476 /*-----------------------------------------------------------------*/
4477 /*-----------------------------------------------------------------*/
4478 static void insertBankSwitch(pCodeInstruction *pci, int Set_Clear, int RP_BankBit)
4482 new_pc = newpCode((Set_Clear?POC_BSF:POC_BCF),popCopyGPR2Bit(PCOP(&pc_status),RP_BankBit));
4484 insertPCodeInstruction(pci, PCI(new_pc));
4487 /*-----------------------------------------------------------------*/
4488 /*-----------------------------------------------------------------*/
4489 static void insertBankSel(pCodeInstruction *pci, const char *name)
4493 pCodeOp *pcop = popCopyReg(PCOR(pci->pcop));
4494 pcop->type = PO_GPR_REGISTER; // Sometimes the type is set to legacy 8051 - so override it
4495 if (pcop->name == 0)
4496 pcop->name = strdup(name);
4497 new_pc = newpCode(POC_BANKSEL, pcop);
4499 insertPCodeInstruction(pci, PCI(new_pc));
4502 /*-----------------------------------------------------------------*/
4503 /* If the register is a fixed known addess then we can assign the */
4504 /* bank selection bits. Otherwise the linker is going to assign */
4505 /* the register location and thus has to set bank selection bits */
4506 /* through the banksel directive. */
4507 /* One critical assumption here is that within this C module all */
4508 /* the locally allocated registers are in the same udata sector. */
4509 /* Therefore banksel is only called for external registers or the */
4510 /* first time a local register is encountered. */
4511 /*-----------------------------------------------------------------*/
4512 static int LastRegIdx; /* If the previous register is the same one again then no need to change bank. */
4513 static int BankSelect(pCodeInstruction *pci, int cur_bank, regs *reg)
4516 int a = reg->alias>>7;
4518 return cur_bank; // This register is available in all banks
4519 } else if ((a&1)&&((cur_bank==0)||(cur_bank==1))) {
4520 return cur_bank; // This register is available in banks 0 & 1
4522 if (reg->address&0x80) {
4523 if ((cur_bank==1)||(cur_bank==3)) {
4524 return cur_bank; // This register is available in banks 1 & 3
4527 if ((cur_bank==0)||(cur_bank==1)) {
4528 return cur_bank; // This register is available in banks 0 & 2
4534 if (LastRegIdx == reg->rIdx) // If this is the same register as last time then it is in same bank
4536 LastRegIdx = reg->rIdx;
4540 bank = REG_BANK(reg);
4541 } else if (reg->isExtern) {
4542 bank = 'E'; // Unfixed extern registers are allocated by the linker therefore its bank is unknown
4544 bank = 'L'; // Unfixed local registers are allocated by the linker therefore its bank is unknown
4546 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.
4547 return 'L'; // Local registers are presumed to be in same linker assigned bank
4548 } else if ((bank == 'L')&&(cur_bank != 'L')) { // Reg is now local and linker to assign bank
4549 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4550 } else if (bank == 'E') { // Reg is now extern and linker to assign bank
4551 insertBankSel(pci, reg->name); // Let linker choose the bank selection
4552 } 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
4553 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4554 if (getMaxRam()&0x100)
4555 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4556 } else { // Current bank and new register banks known - can set bank bits
4557 switch((cur_bank^bank) & 3) {
4561 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4564 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4567 insertBankSwitch(pci, bank&1, PIC_RP0_BIT);
4568 if (getMaxRam()&0x100)
4569 insertBankSwitch(pci, bank&2, PIC_RP1_BIT);
4577 /*-----------------------------------------------------------------*/
4578 /* Check for bank selection pcodes instructions and modify */
4579 /* cur_bank to match. */
4580 /*-----------------------------------------------------------------*/
4581 static int IsBankChange(pCode *pc, regs *reg, int *cur_bank) {
4583 if (isSTATUS_REG(reg)) {
4585 if (PCI(pc)->op == POC_BCF) {
4586 int old_bank = *cur_bank;
4587 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4588 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4589 if (*cur_bank & ~(0x3))
4592 *cur_bank = *cur_bank&0x2;
4593 LastRegIdx = reg->rIdx;
4594 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4595 /* If current bank is unknown or linker assigned then set to 0 else just change the bit */
4596 if (*cur_bank & ~(0x3))
4599 *cur_bank = *cur_bank&0x1;
4600 LastRegIdx = reg->rIdx;
4602 return old_bank != *cur_bank;
4605 if (PCI(pc)->op == POC_BSF) {
4606 int old_bank = *cur_bank;
4607 if (PCORB(PCI(pc)->pcop)->bit == PIC_RP0_BIT) {
4608 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4609 if (*cur_bank & ~(0x3))
4612 *cur_bank = (*cur_bank&0x2) | 0x1;
4613 LastRegIdx = reg->rIdx;
4614 } else if (PCORB(PCI(pc)->pcop)->bit == PIC_RP1_BIT) {
4615 /* If current bank is unknown or linker assigned then set to bit else just change the bit */
4616 if (*cur_bank & ~(0x3))
4619 *cur_bank = (*cur_bank&0x1) | 0x2;
4620 LastRegIdx = reg->rIdx;
4622 return old_bank != *cur_bank;
4625 } else if (PCI(pc)->op == POC_BANKSEL) {
4626 int old_bank = *cur_bank;
4627 regs *r = PCOR(PCI(pc)->pcop)->r;
4628 *cur_bank = (!r || r->isExtern) ? 'E' : 'L';
4629 LastRegIdx = reg->rIdx;
4630 return old_bank != *cur_bank;
4636 /*-----------------------------------------------------------------*/
4637 /* Set bank selection if necessary */
4638 /*-----------------------------------------------------------------*/
4639 static int DoBankSelect(pCode *pc, int cur_bank) {
4647 pCode *pcf = findFunction(get_op_from_instruction(PCI(pc)));
4648 LastRegIdx = -1; /* do not know which register is touched in the called function... */
4649 if (pcf && isPCF(pcf)) {
4651 int rbank = 'U'; // Undetermined
4652 FixRegisterBanking(pcf->pb,cur_bank); // Ensure this block has had its banks selection done
4653 // Check all the returns to work out what bank is selected
4654 for (pcfr=pcf->pb->pcHead; pcfr; pcfr=pcfr->next) {
4656 if ((PCI(pcfr)->op==POC_RETURN) || (PCI(pcfr)->op==POC_RETLW)) {
4658 rbank = PCI(pcfr)->pcflow->lastBank;
4660 if (rbank != PCI(pcfr)->pcflow->lastBank)
4661 return -1; // Unknown bank - multiple returns with different banks
4666 return -1; // Unknown bank
4668 } else if (isPCOS(PCI(pc)->pcop) && PCOS(PCI(pc)->pcop)->isPublic) {
4669 /* Extern functions may use registers in different bank - must call banksel */
4670 return -1; /* Unknown bank */
4676 if ((isPCI(pc)) && (PCI(pc)->op == POC_BANKSEL)) {
4677 return -1; /* New bank unknown - linkers choice. */
4680 reg = getRegFromInstruction(pc);
4682 if (IsBankChange(pc,reg,&cur_bank))
4684 if (!isPCI_LIT(pc)) {
4686 /* Examine the instruction before this one to make sure it is
4687 * not a skip type instruction */
4688 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
4690 if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
4691 cur_bank = BankSelect(PCI(pc),cur_bank,reg);
4693 cur_bank = BankSelect(PCI(pcprev),cur_bank,reg);
4695 if (!PCI(pc)->pcflow)
4696 fprintf(stderr,"PCI ID=%d missing flow pointer ???\n",pc->id);
4698 PCI(pc)->pcflow->lastBank = cur_bank; /* Maintain pCodeFlow lastBank state */
4704 /*-----------------------------------------------------------------*/
4705 /*-----------------------------------------------------------------*/
4707 static void FixRegisterBankingInFlow(pCodeFlow *pcfl, int cur_bank)
4715 pc = findNextInstruction(pcfl->pc.next);
4717 while(isPCinFlow(pc,PCODE(pcfl))) {
4719 cur_bank = DoBankSelect(pc,cur_bank);
4721 pc = findNextInstruction(pc->next);
4725 if(pcprev && cur_bank) {
4726 // Set bank state to unknown at the end of each flow block
4732 /*-----------------------------------------------------------------*/
4733 /*int compareBankFlow - compare the banking requirements between */
4735 /*-----------------------------------------------------------------*/
4737 int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
4740 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
4743 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
4746 if(pcflow->firstBank == -1)
4750 if(pcflowLink->pcflow->firstBank == -1) {
4751 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
4752 pcflowLink->pcflow->to :
4753 pcflowLink->pcflow->from);
4754 return compareBankFlow(pcflow, pctl, toORfrom);
4758 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
4761 pcflowLink->bank_conflict++;
4762 pcflowLink->pcflow->FromConflicts++;
4763 pcflow->ToConflicts++;
4766 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
4769 pcflowLink->bank_conflict++;
4770 pcflowLink->pcflow->ToConflicts++;
4771 pcflow->FromConflicts++;
4775 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
4776 pcflowLink->pcflow->pc.seq,
4777 pcflowLink->pcflow->FromConflicts,
4778 pcflowLink->pcflow->ToConflicts);
4784 /*-----------------------------------------------------------------*/
4785 /*-----------------------------------------------------------------*/
4787 void FixBankFlow(pBlock *pb)
4791 pCodeFlowLink *pcfl;
4793 pCode *pcflow_max_To=NULL;
4794 pCode *pcflow_max_From=NULL;
4795 int max_ToConflicts=0;
4796 int max_FromConflicts=0;
4798 /fprintf(stderr,"Fix Bank flow \n");
4799 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4803 First loop through all of the flow objects in this pcode block
4804 and fix the ones that have banking conflicts between the
4808 //fprintf(stderr, "FixBankFlow - Phase 1\n");
4810 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4812 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4814 if(!isPCFL(pcflow)) {
4815 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4819 if(PCFL(pcflow)->firstBank != PCFL(pcflow)->lastBank &&
4820 PCFL(pcflow)->firstBank >= 0 &&
4821 PCFL(pcflow)->lastBank >= 0 ) {
4823 int cur_bank = (PCFL(pcflow)->firstBank < PCFL(pcflow)->lastBank) ?
4824 PCFL(pcflow)->firstBank : PCFL(pcflow)->lastBank;
4826 FixRegisterBankingInFlow(PCFL(pcflow),cur_bank);
4827 BanksUsedFlow2(pcflow);
4832 //fprintf(stderr, "FixBankFlow - Phase 2\n");
4834 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4836 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4841 if(!isPCFL(pcflow)) {
4842 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4846 PCFL(pcflow)->FromConflicts = 0;
4847 PCFL(pcflow)->ToConflicts = 0;
4852 //fprintf(stderr, " FixBankFlow flow seq %d\n",pcflow->seq);
4853 pcfl = setFirstItem(PCFL(pcflow)->from);
4856 pc = PCODE(pcfl->pcflow);
4859 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4860 pc->print(stderr,pc);
4863 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 0);
4866 pcfl=setNextItem(PCFL(pcflow)->from);
4869 if((nFlows >= 2) && nConflicts && (PCFL(pcflow)->firstBank>0)) {
4870 //fprintf(stderr, " From conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4872 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4873 BanksUsedFlow2(pcflow);
4875 continue; / * Don't need to check the flow from here - it's already been fixed * /
4882 pcfl = setFirstItem(PCFL(pcflow)->to);
4885 pc = PCODE(pcfl->pcflow);
4887 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4888 pc->print(stderr,pc);
4891 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 1);
4894 pcfl=setNextItem(PCFL(pcflow)->to);
4897 if((nFlows >= 2) && nConflicts &&(nConflicts != nFlows) && (PCFL(pcflow)->lastBank>0)) {
4898 //fprintf(stderr, " To conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4900 FixRegisterBankingInFlow(PCFL(pcflow),-1);
4901 BanksUsedFlow2(pcflow);
4906 Loop through the flow objects again and find the ones with the
4910 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4912 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4914 if(PCFL(pcflow)->ToConflicts > max_ToConflicts)
4915 pcflow_max_To = pcflow;
4917 if(PCFL(pcflow)->FromConflicts > max_FromConflicts)
4918 pcflow_max_From = pcflow;
4922 fprintf(stderr,"compare flow Max To conflicts: seq %d conflicts %d\n",
4923 PCFL(pcflow_max_To)->pc.seq,
4924 PCFL(pcflow_max_To)->ToConflicts);
4927 fprintf(stderr,"compare flow Max From conflicts: seq %d conflicts %d\n",
4928 PCFL(pcflow_max_From)->pc.seq,
4929 PCFL(pcflow_max_From)->FromConflicts);
4934 /*-----------------------------------------------------------------*/
4935 /*-----------------------------------------------------------------*/
4936 void DumpFlow(pBlock *pb)
4940 pCodeFlowLink *pcfl;
4943 fprintf(stderr,"Dump flow \n");
4944 pb->pcHead->print(stderr, pb->pcHead);
4946 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4947 pcflow->print(stderr,pcflow);
4949 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4951 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4953 if(!isPCFL(pcflow)) {
4954 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
4957 fprintf(stderr,"dumping: ");
4958 pcflow->print(stderr,pcflow);
4959 FlowStats(PCFL(pcflow));
4961 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4963 pc = PCODE(pcfl->pcflow);
4965 fprintf(stderr, " from seq %d:\n",pc->seq);
4967 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
4968 pc->print(stderr,pc);
4973 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4975 pc = PCODE(pcfl->pcflow);
4977 fprintf(stderr, " to seq %d:\n",pc->seq);
4979 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4980 pc->print(stderr,pc);
4989 /*-----------------------------------------------------------------*/
4990 /*-----------------------------------------------------------------*/
4991 int OptimizepBlock(pBlock *pb)
4996 if(!pb || !peepOptimizing)
4999 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
5001 for(pc = pb->pcHead; pc; pc = pc->next)
5002 matches += pCodePeepMatchRule(pc);
5005 pc = findNextInstruction(pb->pcHead);
5013 if(pCodePeepMatchRule(pc)) {
5018 pc = findNextInstruction(pcprev->next);
5020 pc = findNextInstruction(pb->pcHead);
5022 pc = findNextInstruction(pc->next);
5026 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
5031 /*-----------------------------------------------------------------*/
5032 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
5033 /*-----------------------------------------------------------------*/
5034 pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
5038 for(pc = pcs; pc; pc = pc->next) {
5040 if(((pc->type == PC_OPCODE) || (pc->type == PC_INLINE) || (pc->type == PC_ASMDIR)) &&
5042 (PCI(pc)->pcop->type == PO_LABEL) &&
5043 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
5050 /*-----------------------------------------------------------------*/
5051 /*-----------------------------------------------------------------*/
5052 void exchangeLabels(pCodeLabel *pcl, pCode *pc)
5059 (PCI(pc)->pcop->type == PO_LABEL)) {
5061 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
5063 //fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
5065 free(pcol->pcop.name);
5067 /* If the key is negative, then we (probably) have a label to
5068 * a function and the name is already defined */
5071 sprintf(s=buffer,"_%05d_DS_",pcl->key);
5075 //sprintf(buffer,"_%05d_DS_",pcl->key);
5077 fprintf(stderr, "ERROR %s:%d function label is null\n",__FUNCTION__,__LINE__);
5079 pcol->pcop.name = Safe_strdup(s);
5080 pcol->key = pcl->key;
5081 //pc->print(stderr,pc);
5088 /*-----------------------------------------------------------------*/
5089 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
5090 /* pCode chain if they're not used. */
5091 /*-----------------------------------------------------------------*/
5092 void pBlockRemoveUnusedLabels(pBlock *pb)
5094 pCode *pc; pCodeLabel *pcl;
5099 for(pc = pb->pcHead; (pc=findNextInstruction(pc->next)) != NULL; ) {
5101 pBranch *pbr = PCI(pc)->label;
5102 if(pbr && pbr->next) {
5103 pCode *pcd = pb->pcHead;
5105 //fprintf(stderr, "multiple labels\n");
5106 //pc->print(stderr,pc);
5111 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
5112 //fprintf(stderr,"Used by:\n");
5113 //pcd->print(stderr,pcd);
5115 exchangeLabels(PCL(pbr->pc),pcd);
5124 for(pc = pb->pcHead; pc; pc = pc->next) {
5126 if(isPCL(pc)) // Label pcode
5128 else if (isPCI(pc) && PCI(pc)->label) // pcode instruction with a label
5129 pcl = PCL(PCI(pc)->label->pc);
5132 //fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
5134 /* This pCode is a label, so search the pBlock to see if anyone
5137 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))) {
5138 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
5139 /* Couldn't find an instruction that refers to this label
5140 * So, unlink the pCode label from it's pCode chain
5141 * and destroy the label */
5142 //fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
5144 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
5145 if(pc->type == PC_LABEL) {
5147 pCodeLabelDestruct(pc);
5149 unlinkpCodeFromBranch(pc, PCODE(pcl));
5150 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
5161 /*-----------------------------------------------------------------*/
5162 /* pBlockMergeLabels - remove the pCode labels from the pCode */
5163 /* chain and put them into pBranches that are */
5164 /* associated with the appropriate pCode */
5166 /*-----------------------------------------------------------------*/
5167 void pBlockMergeLabels(pBlock *pb)
5170 pCode *pc, *pcnext=NULL;
5175 /* First, Try to remove any unused labels */
5176 //pBlockRemoveUnusedLabels(pb);
5178 /* Now loop through the pBlock and merge the labels with the opcodes */
5181 // for(pc = pb->pcHead; pc; pc = pc->next) {
5184 pCode *pcn = pc->next;
5186 if(pc->type == PC_LABEL) {
5188 //fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
5189 //fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
5190 if((pcnext = findNextInstruction(pc) )) {
5192 // Unlink the pCode label from it's pCode chain
5195 //fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
5196 // And link it into the instruction's pBranch labels. (Note, since
5197 // it's possible to have multiple labels associated with one instruction
5198 // we must provide a means to accomodate the additional labels. Thus
5199 // the labels are placed into the singly-linked list "label" as
5200 // opposed to being a single member of the pCodeInstruction.)
5202 //_ALLOC(pbr,sizeof(pBranch));
5203 pbr = Safe_calloc(1,sizeof(pBranch));
5207 PCI(pcnext)->label = pBranchAppend(PCI(pcnext)->label,pbr);
5210 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
5212 } else if(pc->type == PC_CSOURCE) {
5214 /* merge the source line symbolic info into the next instruction */
5215 if((pcnext = findNextInstruction(pc) )) {
5217 // Unlink the pCode label from it's pCode chain
5219 PCI(pcnext)->cline = PCCS(pc);
5220 //fprintf(stderr, "merging CSRC\n");
5221 //genericPrint(stderr,pcnext);
5227 pBlockRemoveUnusedLabels(pb);
5231 /*-----------------------------------------------------------------*/
5232 /*-----------------------------------------------------------------*/
5233 int OptimizepCode(char dbName)
5235 #define MAX_PASSES 4
5244 DFPRINTF((stderr," Optimizing pCode\n"));
5248 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5249 if('*' == dbName || getpBlock_dbName(pb) == dbName)
5250 matches += OptimizepBlock(pb);
5253 while(matches && ++passes < MAX_PASSES);
5258 /*-----------------------------------------------------------------*/
5259 /* popCopyGPR2Bit - copy a pcode operator */
5260 /*-----------------------------------------------------------------*/
5262 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval)
5266 pcop = newpCodeOpBit(pc->name, bitval, 0);
5268 if( !( (pcop->type == PO_LABEL) ||
5269 (pcop->type == PO_LITERAL) ||
5270 (pcop->type == PO_STR) ))
5271 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
5277 /*-----------------------------------------------------------------*/
5278 /*-----------------------------------------------------------------*/
5279 static void FixRegisterBanking(pBlock *pb,int cur_bank)
5282 int firstBank = 'U';
5287 for (pc=pb->pcHead; pc; pc=pc->next) {
5289 firstBank = PCFL(pc)->firstBank;
5293 if (firstBank != 'U') {
5294 /* This block has already been done */
5295 if (firstBank != cur_bank) {
5296 /* This block has started with a different bank - must adjust it */
5297 if ((firstBank != -1)&&(firstBank != 'E')) { /* The first bank start off unknown or extern then need not worry as banksel will be called */
5300 regs *reg = getRegFromInstruction(pc);
5302 DoBankSelect(pc,cur_bank);
5312 /* loop through all of the pCodes within this pblock setting the bank selection, ignoring any branching */
5315 for (pc=pb->pcHead; pc; pc=pc->next) {
5317 PCFL(pc)->firstBank = cur_bank;
5320 cur_bank = DoBankSelect(pc,cur_bank);
5323 /* Trace through branches and set the bank selection as required. */
5326 for (pc=pb->pcHead; pc; pc=pc->next) {
5328 PCFL(pc)->firstBank = cur_bank;
5332 if (PCI(pc)->op == POC_GOTO) {
5333 int lastRegIdx = LastRegIdx;
5335 /* Trace through branch */
5336 pCode *pcl = findLabel(PCOLAB(PCI(pcb)->pcop));
5339 regs *reg = getRegFromInstruction(pcl);
5341 int bankUnknown = -1;
5342 if (IsBankChange(pcl,reg,&bankUnknown)) /* Look for any bank change */
5344 if (cur_bank != DoBankSelect(pcl,cur_bank)) /* Set bank selection if necessary */
5350 LastRegIdx = lastRegIdx;
5352 /* Keep track out current bank */
5353 regs *reg = getRegFromInstruction(pc);
5355 IsBankChange(pc,reg,&cur_bank);
5362 /*-----------------------------------------------------------------*/
5363 /*-----------------------------------------------------------------*/
5364 void pBlockDestruct(pBlock *pb)
5375 /*-----------------------------------------------------------------*/
5376 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
5377 /* name dbName and combine them */
5378 /* into one block */
5379 /*-----------------------------------------------------------------*/
5380 void mergepBlocks(char dbName)
5383 pBlock *pb, *pbmerged = NULL,*pbn;
5385 pb = the_pFile->pbHead;
5387 //fprintf(stderr," merging blocks named %c\n",dbName);
5391 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
5392 if( getpBlock_dbName(pb) == dbName) {
5394 //fprintf(stderr," merged block %c\n",dbName);
5399 addpCode2pBlock(pbmerged, pb->pcHead);
5400 /* addpCode2pBlock doesn't handle the tail: */
5401 pbmerged->pcTail = pb->pcTail;
5403 pb->prev->next = pbn;
5405 pbn->prev = pb->prev;
5410 //printpBlock(stderr, pbmerged);
5417 /*-----------------------------------------------------------------*/
5418 /* AnalyzeFlow - Examine the flow of the code and optimize */
5420 /* level 0 == minimal optimization */
5421 /* optimize registers that are used only by two instructions */
5422 /* level 1 == maximal optimization */
5423 /* optimize by looking at pairs of instructions that use the */
5425 /*-----------------------------------------------------------------*/
5427 void AnalyzeFlow(int level)
5429 static int times_called=0;
5437 /* if this is not the first time this function has been called,
5438 then clean up old flow information */
5439 if(times_called++) {
5440 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5443 RegsUnMapLiveRanges();
5449 /* Phase 2 - Flow Analysis - Register Banking
5451 * In this phase, the individual flow blocks are examined
5452 * and register banking is fixed.
5455 //for(pb = the_pFile->pbHead; pb; pb = pb->next)
5456 //FixRegisterBanking(pb);
5458 /* Phase 2 - Flow Analysis
5460 * In this phase, the pCode is partition into pCodeFlow
5461 * blocks. The flow blocks mark the points where a continuous
5462 * stream of instructions changes flow (e.g. because of
5463 * a call or goto or whatever).
5466 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5470 /* Phase 2 - Flow Analysis - linking flow blocks
5472 * In this phase, the individual flow blocks are examined
5473 * to determine their order of excution.
5476 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5479 /* Phase 3 - Flow Analysis - Flow Tree
5481 * In this phase, the individual flow blocks are examined
5482 * to determine their order of excution.
5485 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5489 /* Phase x - Flow Analysis - Used Banks
5491 * In this phase, the individual flow blocks are examined
5492 * to determine the Register Banks they use
5495 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5499 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5500 pCodeRegMapLiveRanges(pb);
5502 RemoveUnusedRegisters();
5504 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5505 pCodeRegOptimizeRegUsage(level);
5511 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5516 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5518 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5519 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5520 pcflow = pcflow->next) {
5522 FillFlow(PCFL(pcflow));
5527 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5529 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
5530 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
5531 pcflow = pcflow->next) {
5533 FlowStats(PCFL(pcflow));
5539 /*-----------------------------------------------------------------*/
5540 /* AnalyzeBanking - Called after the memory addresses have been */
5541 /* assigned to the registers. */
5543 /*-----------------------------------------------------------------*/
5545 void AnalyzeBanking(void)
5549 if(!picIsInitialized()) {
5550 setDefMaxRam(); // Max RAM has not been included, so use default setting
5553 /* Phase x - Flow Analysis - Used Banks
5555 * In this phase, the individual flow blocks are examined
5556 * to determine the Register Banks they use
5562 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
5563 // BanksUsedFlow(pb);
5564 for(pb = the_pFile->pbHead; pb; pb = pb->next)
5565 FixRegisterBanking(pb,-1); // cur_bank is unknown
5569 /*-----------------------------------------------------------------*/
5570 /*-----------------------------------------------------------------*/
5571 DEFSETFUNC (resetrIdx)
5573 regs *r = (regs *)item;
5581 /*-----------------------------------------------------------------*/
5582 /* InitRegReuse - Initialises variables for code analyzer */
5583 /*-----------------------------------------------------------------*/
5585 void InitReuseReg(void)
5587 /* Find end of statically allocated variables for start idx */
5588 unsigned maxIdx = 0x20; /* Start from begining of GPR. Note may not be 0x20 on some PICs */
5590 for (r = setFirstItem(dynDirectRegs); r; r = setNextItem(dynDirectRegs)) {
5591 if (r->type != REG_SFR) {
5592 maxIdx += r->size; /* Increment for all statically allocated variables */
5596 applyToSet(dynAllocRegs,resetrIdx); /* Reset all rIdx to zero. */
5599 /*-----------------------------------------------------------------*/
5600 /*-----------------------------------------------------------------*/
5601 static unsigned register_reassign(pBlock *pb, unsigned idx)
5605 /* check recursion */
5606 pc = setFirstItem(pb->function_entries);
5612 DFPRINTF((stderr," reassigning registers for function \"%s\"\n",PCF(pc)->fname));
5614 if (pb->tregisters) {
5616 for (r = setFirstItem(pb->tregisters); r; r = setNextItem(pb->tregisters)) {
5617 if (r->type == REG_GPR) {
5619 if (r->rIdx < (int)idx) {
5622 if (peakIdx < idx) peakIdx = idx;
5623 sprintf(s,"r0x%02X", r->rIdx);
5624 DFPRINTF((stderr," reassigning register \"%s\" to \"%s\"\n",r->name,s));
5626 r->name = Safe_strdup(s);
5632 for(pc = setFirstItem(pb->function_calls); pc; pc = setNextItem(pb->function_calls)) {
5634 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5635 char *dest = get_op_from_instruction(PCI(pc));
5637 pCode *pcn = findFunction(dest);
5639 register_reassign(pcn->pb,idx);
5648 /*------------------------------------------------------------------*/
5649 /* ReuseReg were call tree permits */
5651 /* Re-allocate the GPR for optimum reuse for a given pblock */
5652 /* eg if a function m() calls function f1() and f2(), where f1 */
5653 /* allocates a local variable vf1 and f2 allocates a local */
5654 /* variable vf2. Then providing f1 and f2 do not call each other */
5655 /* they may share the same general purpose registers for vf1 and */
5657 /* This is done by first setting the the regs rIdx to start after */
5658 /* all the global variables, then walking through the call tree */
5659 /* renaming the registers to match their new idx and incrementng */
5660 /* it as it goes. If a function has already been called it will */
5661 /* only rename the registers if it has already used up those */
5662 /* registers ie rIdx of the function's registers is lower than the */
5663 /* current rIdx. That way the register will not be reused while */
5664 /* still being used by an eariler function call. */
5666 /* Note for this to work the functions need to be declared static. */
5668 /*------------------------------------------------------------------*/
5673 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5674 /* Non static functions can be called from other modules so their registers must reassign */
5675 if (pb->function_entries&&(PCF(setFirstItem(pb->function_entries))->isPublic||!pb->visited))
5676 register_reassign(pb,peakIdx);
5680 /*-----------------------------------------------------------------*/
5681 /* buildCallTree - look at the flow and extract all of the calls */
5683 /*-----------------------------------------------------------------*/
5685 void buildCallTree(void )
5694 /* Now build the call tree.
5695 First we examine all of the pCodes for functions.
5696 Keep in mind that the function boundaries coincide
5697 with pBlock boundaries.
5699 The algorithm goes something like this:
5700 We have two nested loops. The outer loop iterates
5701 through all of the pBlocks/functions. The inner
5702 loop iterates through all of the pCodes for
5703 a given pBlock. When we begin iterating through
5704 a pBlock, the variable pc_fstart, pCode of the start
5705 of a function, is cleared. We then search for pCodes
5706 of type PC_FUNCTION. When one is encountered, we
5707 initialize pc_fstart to this and at the same time
5708 associate a new pBranch object that signifies a
5709 branch entry. If a return is found, then this signifies
5710 a function exit point. We'll link the pCodes of these
5711 returns to the matching pc_fstart.
5713 When we're done, a doubly linked list of pBranches
5714 will exist. The head of this list is stored in
5715 `the_pFile', which is the meta structure for all
5716 of the pCode. Look at the printCallTree function
5717 on how the pBranches are linked together.
5720 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5721 pCode *pc_fstart=NULL;
5722 for(pc = pb->pcHead; pc; pc = pc->next) {
5724 pCodeFunction *pcf = PCF(pc);
5727 if(STRCASECMP(pcf->fname, "_main") == 0) {
5728 //fprintf(stderr," found main \n");
5729 pb->cmemmap = NULL; /* FIXME do we need to free ? */
5733 pbr = Safe_calloc(1,sizeof(pBranch));
5734 pbr->pc = pc_fstart = pc;
5737 the_pFile->functions = pBranchAppend(the_pFile->functions,pbr);
5739 // Here's a better way of doing the same:
5740 addSet(&pb->function_entries, pc);
5743 // Found an exit point in a function, e.g. return
5744 // (Note, there may be more than one return per function)
5746 pBranchLink(PCF(pc_fstart), pcf);
5748 addSet(&pb->function_exits, pc);
5750 } else if(isCALL(pc)) {
5751 addSet(&pb->function_calls,pc);
5757 /*-----------------------------------------------------------------*/
5758 /* AnalyzepCode - parse the pCode that has been generated and form */
5759 /* all of the logical connections. */
5761 /* Essentially what's done here is that the pCode flow is */
5763 /*-----------------------------------------------------------------*/
5765 void AnalyzepCode(char dbName)
5776 /* Phase 1 - Register allocation and peep hole optimization
5778 * The first part of the analysis is to determine the registers
5779 * that are used in the pCode. Once that is done, the peep rules
5780 * are applied to the code. We continue to loop until no more
5781 * peep rule optimizations are found (or until we exceed the
5782 * MAX_PASSES threshold).
5784 * When done, the required registers will be determined.
5790 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
5792 /* First, merge the labels with the instructions */
5793 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5794 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
5796 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
5797 pBlockMergeLabels(pb);
5800 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName(pb)));
5804 changes = OptimizepCode(dbName);
5806 } while(changes && (i++ < MAX_PASSES));
5811 /*-----------------------------------------------------------------*/
5812 /* ispCodeFunction - returns true if *pc is the pCode of a */
5814 /*-----------------------------------------------------------------*/
5815 bool ispCodeFunction(pCode *pc)
5818 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
5824 /*-----------------------------------------------------------------*/
5825 /* findFunction - Search for a function by name (given the name) */
5826 /* in the set of all functions that are in a pBlock */
5827 /* (note - I expect this to change because I'm planning to limit */
5828 /* pBlock's to just one function declaration */
5829 /*-----------------------------------------------------------------*/
5830 pCode *findFunction(char *fname)
5837 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5839 pc = setFirstItem(pb->function_entries);
5842 if((pc->type == PC_FUNCTION) &&
5844 (strcmp(fname, PCF(pc)->fname)==0))
5847 pc = setNextItem(pb->function_entries);
5855 void MarkUsedRegisters(set *regset)
5860 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
5861 r2 = pic14_regWithIdx(r1->rIdx);
5869 void pBlockStats(FILE *of, pBlock *pb)
5875 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
5877 // for now just print the first element of each set
5878 pc = setFirstItem(pb->function_entries);
5880 fprintf(of,";entry: ");
5883 pc = setFirstItem(pb->function_exits);
5885 fprintf(of,";has an exit\n");
5889 pc = setFirstItem(pb->function_calls);
5891 fprintf(of,";functions called:\n");
5894 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5895 fprintf(of,"; %s\n",get_op_from_instruction(PCI(pc)));
5897 pc = setNextItem(pb->function_calls);
5901 r = setFirstItem(pb->tregisters);
5903 int n = elementsInSet(pb->tregisters);
5905 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
5908 fprintf(of,"; %s\n",r->name);
5909 r = setNextItem(pb->tregisters);
5914 /*-----------------------------------------------------------------*/
5915 /*-----------------------------------------------------------------*/
5917 static void sequencepCode(void)
5923 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5925 pb->seq = GpCodeSequenceNumber+1;
5927 for( pc = pb->pcHead; pc; pc = pc->next)
5928 pc->seq = ++GpCodeSequenceNumber;
5934 /*-----------------------------------------------------------------*/
5935 /*-----------------------------------------------------------------*/
5937 set *register_usage(pBlock *pb)
5940 set *registers=NULL;
5941 set *registersInCallPath = NULL;
5943 / * check recursion * /
5945 pc = setFirstItem(pb->function_entries);
5952 if(pc->type != PC_FUNCTION)
5953 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
5955 pc = setFirstItem(pb->function_calls);
5956 for( ; pc; pc = setNextItem(pb->function_calls)) {
5958 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5959 char *dest = get_op_from_instruction(PCI(pc));
5961 pcn = findFunction(dest);
5963 registersInCallPath = register_usage(pcn->pb);
5965 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5970 pBlockStats(stderr,pb); // debug
5973 // Mark the registers in this block as used.
5975 MarkUsedRegisters(pb->tregisters);
5976 if(registersInCallPath) {
5977 / * registers were used in the functions this pBlock has called * /
5978 / * so now, we need to see if these collide with the ones we are * /
5981 regs *r1,*r2, *newreg;
5983 DFPRINTF((stderr,"comparing registers\n"));
5985 r1 = setFirstItem(registersInCallPath);
5987 if (r1->type != REG_STK) {
5988 r2 = setFirstItem(pb->tregisters);
5990 while(r2 && (r2->type != REG_STK)) {
5992 if(r2->rIdx == r1->rIdx) {
5993 newreg = pic14_findFreeReg(REG_GPR);
5997 DFPRINTF((stderr,"Bummer, no more registers.\n"));
6001 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
6002 r1->rIdx, newreg->rIdx));
6003 r2->rIdx = newreg->rIdx;
6005 r2->name = Safe_strdup(newreg->name);
6009 newreg->wasUsed = 1;
6011 r2 = setNextItem(pb->tregisters);
6015 r1 = setNextItem(registersInCallPath);
6018 / * Collisions have been resolved. Now free the registers in the call path * /
6019 r1 = setFirstItem(registersInCallPath);
6021 newreg = pic14_regWithIdx(r1->rIdx);
6022 if (newreg) newreg->isFree = 1;
6023 r1 = setNextItem(registersInCallPath);
6027 // MarkUsedRegisters(pb->registers);
6029 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
6032 DFPRINTF((stderr,"returning regs\n"));
6034 DFPRINTF((stderr,"not returning regs\n"));
6036 DFPRINTF((stderr,"pBlock after register optim.\n"));
6037 pBlockStats(stderr,pb); // debug
6044 /*-----------------------------------------------------------------*/
6045 /* printCallTree - writes the call tree to a file */
6047 /*-----------------------------------------------------------------*/
6048 void pct2(FILE *of,pBlock *pb,int indent)
6052 // set *registersInCallPath = NULL;
6058 return; //recursion ?
6060 pc = setFirstItem(pb->function_entries);
6067 for(i=0;i<indent;i++) // Indentation
6070 if(pc->type == PC_FUNCTION)
6071 fprintf(of,"%s\n",PCF(pc)->fname);
6076 pc = setFirstItem(pb->function_calls);
6077 for( ; pc; pc = setNextItem(pb->function_calls)) {
6079 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
6080 char *dest = get_op_from_instruction(PCI(pc));
6082 pcn = findFunction(dest);
6084 pct2(of,pcn->pb,indent+1);
6086 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6094 /*-----------------------------------------------------------------*/
6095 /* printCallTree - writes the call tree to a file */
6097 /*-----------------------------------------------------------------*/
6099 void printCallTree(FILE *of)
6111 fprintf(of, "\npBlock statistics\n");
6112 for(pb = the_pFile->pbHead; pb; pb = pb->next )
6117 fprintf(of,"Call Tree\n");
6118 pbr = the_pFile->functions;
6122 if(!ispCodeFunction(pc))
6123 fprintf(of,"bug in call tree");
6126 fprintf(of,"Function: %s\n", PCF(pc)->fname);
6128 while(pc->next && !ispCodeFunction(pc->next)) {
6130 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
6131 fprintf(of,"\t%s\n",get_op_from_instruction(PCI(pc)));
6139 fprintf(of,"\n**************\n\na better call tree\n");
6140 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6145 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6146 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
6152 /*-----------------------------------------------------------------*/
6154 /*-----------------------------------------------------------------*/
6156 void InlineFunction(pBlock *pb)
6164 pc = setFirstItem(pb->function_calls);
6166 for( ; pc; pc = setNextItem(pb->function_calls)) {
6169 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6170 pCode *pcp = pc->prev;
6176 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 */
6178 InlineFunction(pcn->pb);
6181 At this point, *pc points to a CALL mnemonic, and
6182 *pcn points to the function that is being called.
6184 To in-line this call, we need to remove the CALL
6185 and RETURN(s), and link the function pCode in with
6192 /* Check if previous instruction was a bit skip */
6193 if (isPCI_BITSKIP(pcp)) {
6195 /* Invert skip instruction and add a goto */
6196 PCI(pcp)->op = (PCI(pcp)->op == POC_BTFSS) ? POC_BTFSC : POC_BTFSS;
6198 if(isPCL(pc_call->next)) { // Label pcode
6199 pcl = PCL(pc_call->next);
6200 } else if (isPCI(pc_call->next) && PCI(pc_call->next)->label) { // pcode instruction with a label
6201 pcl = PCL(PCI(pc_call->next)->label->pc);
6203 pcl = PCL(newpCodeLabel(NULL, newiTempLabel(NULL)->key+100));
6204 PCI(pc_call->next)->label->pc = (struct pCode*)pcl;
6206 pCodeInsertAfter(pcp, newpCode(POC_GOTO, newpCodeOp(pcl->label,PO_STR)));
6209 /* remove callee pBlock from the pBlock linked list */
6210 removepBlock(pcn->pb);
6218 /* Remove the Function pCode */
6219 pct = findNextInstruction(pcn->next);
6221 /* Link the function with the callee */
6222 if (pcp) pcp->next = pcn->next;
6223 pcn->next->prev = pcp;
6225 /* Convert the function name into a label */
6227 pbr = Safe_calloc(1,sizeof(pBranch));
6228 pbr->pc = newpCodeLabel(PCF(pcn)->fname, -1);
6230 PCI(pct)->label = pBranchAppend(PCI(pct)->label,pbr);
6231 PCI(pct)->label = pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
6233 /* turn all of the return's except the last into goto's */
6234 /* check case for 2 instruction pBlocks */
6235 pce = findNextInstruction(pcn->next);
6237 pCode *pce_next = findNextInstruction(pce->next);
6239 if(pce_next == NULL) {
6240 /* found the last return */
6241 pCode *pc_call_next = findNextInstruction(pc_call->next);
6243 //fprintf(stderr,"found last return\n");
6244 //pce->print(stderr,pce);
6245 pce->prev->next = pc_call->next;
6246 pc_call->next->prev = pce->prev;
6247 PCI(pc_call_next)->label = pBranchAppend(PCI(pc_call_next)->label,
6256 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6262 /*-----------------------------------------------------------------*/
6264 /*-----------------------------------------------------------------*/
6266 void InlinepCode(void)
6275 if(!functionInlining)
6278 /* Loop through all of the function definitions and count the
6279 * number of times each one is called */
6280 //fprintf(stderr,"inlining %d\n",__LINE__);
6282 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
6284 pc = setFirstItem(pb->function_calls);
6286 for( ; pc; pc = setNextItem(pb->function_calls)) {
6289 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
6290 if(pcn && isPCF(pcn)) {
6291 PCF(pcn)->ncalled++;
6294 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
6299 //fprintf(stderr,"inlining %d\n",__LINE__);
6301 /* Now, Loop through the function definitions again, but this
6302 * time inline those functions that have only been called once. */
6304 InlineFunction(the_pFile->pbHead);
6305 //fprintf(stderr,"inlining %d\n",__LINE__);
6307 for(pb = the_pFile->pbHead; pb; pb = pb->next)