2 * Simulator for the Hitachi H8/300 architecture.
4 * Written by Steve Chamberlain of Cygnus Support. sac@cygnus.com
6 * This file is part of H8/300 sim
9 * THIS SOFTWARE IS NOT COPYRIGHTED
11 * Cygnus offers the following for use in the public domain. Cygnus makes no
12 * warranty with regard to the software or its performance and the user
13 * accepts the software "AS IS" with all faults.
15 * CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THIS
16 * SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
17 * AND FITNESS FOR A PARTICULAR PURPOSE.
29 #include <sys/param.h>
33 #include "remote-sim.h"
39 #define X(op, size) op*4+size
41 #define SP (h8300hmode ? SL:SW)
54 #define h8_opcodes ops
56 #include "opcode/h8300.h"
60 #define LOW_BYTE(x) ((x) & 0xff)
61 #define HIGH_BYTE(x) (((x)>>8) & 0xff)
62 #define P(X,Y) ((X<<8) | Y)
64 #define BUILDSR() cpu.ccr = (N << 3) | (Z << 2) | (V<<1) | C;
67 c = (cpu.ccr >> 0) & 1;\
68 v = (cpu.ccr >> 1) & 1;\
69 nz = !((cpu.ccr >> 2) & 1);\
70 n = (cpu.ccr >> 3) & 1;
72 #ifdef __CHAR_IS_SIGNED__
73 #define SEXTCHAR(x) ((char)(x))
77 #define SEXTCHAR(x) ((x & 0x80) ? (x | ~0xff):x)
80 #define UEXTCHAR(x) ((x) & 0xff)
81 #define UEXTSHORT(x) ((x) & 0xffff)
82 #define SEXTSHORT(x) ((short)(x))
84 static cpu_state_type cpu;
88 static int memory_size;
119 return h8300hmode ? SL : SW;
132 return X (OP_IMM, SP);
134 return X (OP_REG, SP);
138 return X (OP_MEM, SP);
145 decode (addr, data, dst)
158 struct h8_opcode *q = h8_opcodes;
162 /* Find the exact opcode/arg combo */
166 unsigned int len = 0;
172 op_type looking_for = *nib;
173 int thisnib = data[len >> 1];
175 thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
177 if (looking_for < 16 && looking_for >= 0)
179 if (looking_for != thisnib)
184 if ((int) looking_for & (int) B31)
186 if (!(((int) thisnib & 0x8) != 0))
188 looking_for = (op_type) ((int) looking_for & ~(int)
192 if ((int) looking_for & (int) B30)
194 if (!(((int) thisnib & 0x8) == 0))
196 looking_for = (op_type) ((int) looking_for & ~(int) B30);
198 if (looking_for & DBIT)
200 if ((looking_for & 5) != (thisnib & 5))
202 abs = (thisnib & 0x8) ? 2 : 1;
204 else if (looking_for & (REG | IND | INC | DEC))
206 if (looking_for & REG)
209 * Can work out size from the
212 size = bitfrom (looking_for);
214 if (looking_for & SRC)
223 else if (looking_for & L_16)
225 abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1];
227 if (looking_for & (PCREL | DISP))
232 else if (looking_for & ABSJMP)
239 else if (looking_for & MEMIND)
243 else if (looking_for & L_32)
246 abs = (data[i] << 24)
247 | (data[i + 1] << 16)
253 else if (looking_for & L_24)
256 abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
259 else if (looking_for & IGNORE)
263 else if (looking_for & DISPREG)
265 rdisp = thisnib & 0x7;
267 else if (looking_for & KBIT)
282 else if (looking_for & L_8)
286 if (looking_for & PCREL)
288 abs = SEXTCHAR (data[len >> 1]);
290 else if (looking_for & ABS8MEM)
293 abs = h8300hmode ? ~0xff0000ff : ~0xffff00ff;
294 abs |= data[len >> 1] & 0xff ;
298 abs = data[len >> 1] & 0xff;
301 else if (looking_for & L_3)
307 else if (looking_for == E)
311 /* Fill in the args */
313 op_type *args = q->args.nib;
319 int rn = (x & DST) ? rd : rs;
333 p->type = X (OP_IMM, size);
336 else if (x & (IMM | KBIT | DBIT))
338 p->type = X (OP_IMM, size);
343 /* Reset the size, some
344 ops (like mul) have two sizes */
347 p->type = X (OP_REG, size);
352 p->type = X (OP_INC, size);
357 p->type = X (OP_DEC, size);
362 p->type = X (OP_DISP, size);
366 else if (x & (ABS | ABSJMP | ABS8MEM))
368 p->type = X (OP_DISP, size);
374 p->type = X (OP_MEM, size);
379 p->type = X (OP_PCREL, size);
380 p->literal = abs + addr + 2;
386 p->type = X (OP_IMM, SP);
391 p->type = X (OP_DISP, size);
393 p->reg = rdisp & 0x7;
400 printf ("Hmmmm %x", x);
407 * But a jmp or a jsr gets
408 * automagically lvalued, since we
409 * branch to their address not their
412 if (q->how == O (O_JSR, SB)
413 || q->how == O (O_JMP, SB))
415 dst->src.type = lvalue (dst->src.type, dst->src.reg);
418 if (dst->dst.type == -1)
421 dst->opcode = q->how;
422 dst->cycles = q->time;
424 /* And a jsr to 0xc4 is turned into a magic trap */
426 if (dst->opcode == O (O_JSR, SB))
428 if (dst->src.literal == 0xc4)
430 dst->opcode = O (O_SYSCALL, SB);
434 dst->next_pc = addr + len / 2;
439 printf ("Dont understand %x \n", looking_for);
451 dst->opcode = O (O_ILL, SB);
460 /* find the next cache entry to use */
462 idx = cpu.cache_top + 1;
464 if (idx >= cpu.csize)
470 /* Throw away its old meaning */
471 cpu.cache_idx[cpu.cache[idx].oldpc] = 0;
473 /* set to new address */
474 cpu.cache[idx].oldpc = pc;
476 /* fill in instruction info */
477 decode (pc, cpu.memory + pc, cpu.cache + idx);
479 /* point to new cache entry */
480 cpu.cache_idx[pc] = idx;
484 static unsigned char *breg[18];
485 static unsigned short *wreg[18];
486 static unsigned int *lreg[18];
488 #define GET_B_REG(x) *(breg[x])
489 #define SET_B_REG(x,y) (*(breg[x])) = (y)
490 #define GET_W_REG(x) *(wreg[x])
491 #define SET_W_REG(x,y) (*(wreg[x])) = (y)
493 #define GET_L_REG(x) *(lreg[x])
494 #define SET_L_REG(x,y) (*(lreg[x])) = (y)
496 #define GET_MEMORY_L(x) \
497 ((cpu.memory[x+0] << 24) | (cpu.memory[x+1] << 16) | (cpu.memory[x+2] << 8) | cpu.memory[x+3])
499 #define GET_MEMORY_W(x) \
500 ((cpu.memory[x+0] << 8) | (cpu.memory[x+1] << 0))
503 #define SET_MEMORY_B(x,y) \
504 (cpu.memory[(x)] = y)
506 #define SET_MEMORY_W(x,y) \
507 {register unsigned char *_p = cpu.memory+x;\
508 register int __y = y;\
512 #define SET_MEMORY_L(x,y) \
513 {register unsigned char *_p = cpu.memory+x;register int __y = y;\
514 _p[0] = (__y)>>24; _p[1] = (__y)>>16; _p[2] = (__y)>>8; _p[3] = (__y)>>0;}
516 #define GET_MEMORY_B(x) (cpu.memory[x])
523 int abs = arg->literal;
530 return GET_B_REG (rn);
532 return GET_W_REG (rn);
534 return GET_L_REG (rn);
545 r = GET_MEMORY_B (t);
554 r = GET_MEMORY_W (t);
562 r = GET_MEMORY_L (t);
569 case X (OP_DISP, SB):
570 t = GET_L_REG (rn) + abs;
572 return GET_MEMORY_B (t);
574 case X (OP_DISP, SW):
575 t = GET_L_REG (rn) + abs;
577 return GET_MEMORY_W (t);
579 case X (OP_DISP, SL):
580 t = GET_L_REG (rn) + abs;
582 return GET_MEMORY_L (t);
585 t = GET_MEMORY_L (abs);
590 t = GET_MEMORY_W (abs);
608 int abs = arg->literal;
624 t = GET_L_REG (rn) - 1;
631 t = (GET_L_REG (rn) - 2) & cpu.mask;
637 t = (GET_L_REG (rn) - 4) & cpu.mask;
642 case X (OP_DISP, SB):
643 t = GET_L_REG (rn) + abs;
648 case X (OP_DISP, SW):
649 t = GET_L_REG (rn) + abs;
654 case X (OP_DISP, SL):
655 t = GET_L_REG (rn) + abs;
692 memory_size = H8300H_MSIZE;
694 memory_size = H8300_MSIZE;
695 cpu.memory = (unsigned char *) calloc (sizeof (char), memory_size);
696 cpu.cache_idx = (unsigned short *) calloc (sizeof (short), memory_size);
698 /* `msize' must be a power of two */
699 if ((memory_size & (memory_size - 1)) != 0)
701 cpu.mask = memory_size - 1;
703 for (i = 0; i < 9; i++)
708 for (i = 0; i < 8; i++)
710 unsigned char *p = (unsigned char *) (cpu.regs + i);
711 unsigned char *e = (unsigned char *) (cpu.regs + i + 1);
712 unsigned short *q = (unsigned short *) (cpu.regs + i);
713 unsigned short *u = (unsigned short *) (cpu.regs + i + 1);
714 cpu.regs[i] = 0x00112233;
740 lreg[i] = &cpu.regs[i];
743 lreg[8] = &cpu.regs[8];
745 /* initialize the seg registers */
752 control_c (sig, code, scp, addr)
758 cpu.exception = SIGINT;
767 mop (code, bsize, sign)
780 bsize ? SEXTCHAR (GET_W_REG (code->dst.reg)) :
781 SEXTSHORT (GET_W_REG (code->dst.reg));
783 bsize ? SEXTCHAR (GET_B_REG (code->src.reg)) :
784 SEXTSHORT (GET_W_REG (code->src.reg));
788 multiplicand = bsize ? UEXTCHAR (GET_W_REG (code->dst.reg)) :
789 UEXTSHORT (GET_W_REG (code->dst.reg));
791 bsize ? UEXTCHAR (GET_B_REG (code->src.reg)) :
792 UEXTSHORT (GET_W_REG (code->src.reg));
795 result = multiplier * multiplicand;
799 n = result & (bsize ? 0x8000 : 0x80000000);
800 nz = result & (bsize ? 0xffff : 0xffffffff);
804 SET_W_REG (code->dst.reg, result);
808 SET_L_REG (code->dst.reg, result);
810 /* return ((n==1) << 1) | (nz==1); */
814 #define OSHIFTS(name, how) \
819 rd = GET_B_REG (code->src.reg); \
827 rd = GET_W_REG (code->src.reg); \
834 int hm = 0x80000000; \
835 rd = GET_L_REG (code->src.reg); \
840 #define OBITOP(name,f, s, op) \
845 if (f) ea = fetch (&code->dst); \
846 m=1<< fetch(&code->src); \
848 if(s) store (&code->dst,ea); goto next; \
852 sim_resume (step, siggnal)
857 int tick_start = get_now ();
870 prev = signal (SIGINT, control_c);
874 cpu.exception = SIGTRAP;
893 cidx = cpu.cache_idx[pc];
894 code = cpu.cache + cidx;
897 #define ALUOP(STORE, NAME, HOW) \
898 case O(NAME,SB): HOW; if(STORE)goto alu8;else goto just_flags_alu8; \
899 case O(NAME, SW): HOW; if(STORE)goto alu16;else goto just_flags_alu16; \
900 case O(NAME,SL): HOW; if(STORE)goto alu32;else goto just_flags_alu32;
903 #define LOGOP(NAME, HOW) \
904 case O(NAME,SB): HOW; goto log8;\
905 case O(NAME, SW): HOW; goto log16;\
906 case O(NAME,SL): HOW; goto log32;
913 printf ("%x %d %s\n", pc, code->opcode,
914 code->op ? code->op->name : "**");
916 cpu.stats[code->opcode]++;
920 cycles += code->cycles;
922 switch (code->opcode)
926 * This opcode is a fake for when we get to an
927 * instruction which hasnt been compiled
935 rd = fetch (&code->dst);
936 ea = fetch (&code->src);
942 rd = fetch (&code->dst);
943 ea = fetch (&code->src);
948 #define EA ea = fetch(&code->src);
949 #define RD_EA ea = fetch(&code->src); rd = fetch(&code->dst);
951 ALUOP (1, O_SUB, RD_EA;
960 rd = GET_B_REG (code->dst.reg);
961 ea = fetch (&code->src);
965 rd = GET_W_REG (code->dst.reg);
966 ea = fetch (&code->src);
970 rd = GET_L_REG (code->dst.reg);
971 ea = fetch (&code->src);
986 case O (O_MOV_TO_MEM, SB):
987 res = GET_B_REG (code->src.reg);
989 case O (O_MOV_TO_MEM, SW):
990 res = GET_W_REG (code->src.reg);
992 case O (O_MOV_TO_MEM, SL):
993 res = GET_L_REG (code->src.reg);
997 case O (O_MOV_TO_REG, SB):
998 res = fetch (&code->src);
999 SET_B_REG (code->dst.reg, res);
1000 goto just_flags_log8;
1001 case O (O_MOV_TO_REG, SW):
1002 res = fetch (&code->src);
1003 SET_W_REG (code->dst.reg, res);
1004 goto just_flags_log16;
1005 case O (O_MOV_TO_REG, SL):
1006 res = fetch (&code->src);
1007 SET_L_REG (code->dst.reg, res);
1008 goto just_flags_log32;
1011 case O (O_ADDS, SL):
1012 SET_L_REG (code->dst.reg,
1013 GET_L_REG (code->dst.reg)
1014 + code->src.literal);
1018 case O (O_SUBS, SL):
1019 SET_L_REG (code->dst.reg,
1020 GET_L_REG (code->dst.reg)
1021 - code->src.literal);
1025 rd = fetch (&code->dst);
1026 ea = fetch (&code->src);
1029 goto just_flags_alu8;
1032 rd = fetch (&code->dst);
1033 ea = fetch (&code->src);
1036 goto just_flags_alu16;
1039 rd = fetch (&code->dst);
1040 ea = fetch (&code->src);
1043 goto just_flags_alu32;
1047 rd = GET_B_REG (code->src.reg);
1050 SET_B_REG (code->src.reg, res);
1051 goto just_flags_inc8;
1054 rd = GET_W_REG (code->dst.reg);
1055 ea = -code->src.literal;
1057 SET_W_REG (code->dst.reg, res);
1058 goto just_flags_inc16;
1061 rd = GET_L_REG (code->dst.reg);
1062 ea = -code->src.literal;
1064 SET_L_REG (code->dst.reg, res);
1065 goto just_flags_inc32;
1069 rd = GET_B_REG (code->src.reg);
1072 SET_B_REG (code->src.reg, res);
1073 goto just_flags_inc8;
1076 rd = GET_W_REG (code->dst.reg);
1077 ea = code->src.literal;
1079 SET_W_REG (code->dst.reg, res);
1080 goto just_flags_inc16;
1083 rd = GET_L_REG (code->dst.reg);
1084 ea = code->src.literal;
1086 SET_L_REG (code->dst.reg, res);
1087 goto just_flags_inc32;
1090 #define GET_CCR(x) BUILDSR();x = cpu.ccr
1092 case O (O_ANDC, SB):
1094 ea = code->src.literal;
1100 ea = code->src.literal;
1104 case O (O_XORC, SB):
1106 ea = code->src.literal;
1147 if (((Z || (N ^ V)) == 0))
1153 if (((Z || (N ^ V)) == 1))
1187 case O (O_SYSCALL, SB):
1188 printf ("%c", cpu.regs[2]);
1191 OSHIFTS (O_NOT, rd = ~rd; v = 0;);
1192 OSHIFTS (O_SHLL, c = rd & hm; v = 0;
1194 OSHIFTS (O_SHLR, c = rd & 1; v = 0;
1195 rd = (unsigned int) rd >> 1);
1196 OSHIFTS (O_SHAL, c = rd & hm;
1197 v = (rd & hm) != ((rd & (hm >> 1)) << 1);
1199 OSHIFTS (O_SHAR, t = rd & hm;
1205 OSHIFTS (O_ROTL, c = rd & hm;
1209 OSHIFTS (O_ROTR, c = rd & 1;
1211 rd = (unsigned int) rd >> 1;
1213 OSHIFTS (O_ROTXL, t = rd & hm;
1219 OSHIFTS (O_ROTXR, t = rd & 1;
1220 rd = (unsigned int) rd >> 1;
1221 if (C) rd |= hm; c = t;
1226 pc = fetch (&code->src);
1234 pc = fetch (&code->src);
1241 SET_MEMORY_L (tmp, code->next_pc);
1246 SET_MEMORY_W (tmp, code->next_pc);
1253 pc = code->src.literal;
1264 pc = GET_MEMORY_L (tmp);
1269 pc = GET_MEMORY_W (tmp);
1278 cpu.exception = SIGILL;
1280 case O (O_SLEEP, SB):
1281 /* The format of r0 is defined by devo/include/wait.h.
1282 cpu.exception handling needs some cleanup: we need to make the
1283 the handling of normal exits vs signals, etc. more sensible. */
1284 if (! WIFEXITED (cpu.regs[0]) && WIFSIGNALED (cpu.regs[0]))
1285 cpu.exception = SIGILL;
1287 cpu.exception = SIGTRAP;
1290 cpu.exception = SIGTRAP;
1293 OBITOP (O_BNOT, 1, 1, ea ^= m);
1294 OBITOP (O_BTST, 1, 0, nz = ea & m);
1295 OBITOP (O_BCLR, 1, 1, ea &= ~m);
1296 OBITOP (O_BSET, 1, 1, ea |= m);
1297 OBITOP (O_BLD, 1, 0, c = ea & m);
1298 OBITOP (O_BILD, 1, 0, c = !(ea & m));
1299 OBITOP (O_BST, 1, 1, ea &= ~m;
1301 OBITOP (O_BIST, 1, 1, ea &= ~m;
1303 OBITOP (O_BAND, 1, 0, c = (ea & m) && C);
1304 OBITOP (O_BIAND, 1, 0, c = !(ea & m) && C);
1305 OBITOP (O_BOR, 1, 0, c = (ea & m) || C);
1306 OBITOP (O_BIOR, 1, 0, c = !(ea & m) || C);
1307 OBITOP (O_BXOR, 1, 0, c = (ea & m) != C);
1308 OBITOP (O_BIXOR, 1, 0, c = !(ea & m) != C);
1311 #define MOP(bsize, signed) mop(code, bsize,signed); goto next;
1313 case O (O_MULS, SB):
1316 case O (O_MULS, SW):
1319 case O (O_MULU, SB):
1322 case O (O_MULU, SW):
1327 case O (O_DIVU, SB):
1329 rd = GET_W_REG (code->dst.reg);
1330 ea = GET_B_REG (code->src.reg);
1336 SET_W_REG (code->dst.reg, (rd & 0xff) | (tmp << 8));
1342 case O (O_DIVU, SW):
1344 rd = GET_L_REG (code->dst.reg);
1345 ea = GET_W_REG (code->src.reg);
1353 SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
1357 case O (O_DIVS, SB):
1360 rd = SEXTSHORT (GET_W_REG (code->dst.reg));
1361 ea = SEXTCHAR (GET_B_REG (code->src.reg));
1364 tmp = (int) rd % (int) ea;
1365 rd = (int) rd / (int) ea;
1371 SET_W_REG (code->dst.reg, (rd & 0xff) | (tmp << 8));
1374 case O (O_DIVS, SW):
1376 rd = GET_L_REG (code->dst.reg);
1377 ea = SEXTSHORT (GET_W_REG (code->src.reg));
1380 tmp = (int) rd % (int) ea;
1381 rd = (int) rd / (int) ea;
1382 n = rd & 0x80000000;
1387 SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
1390 case O (O_EXTS, SW):
1391 rd = GET_B_REG (code->src.reg + 8) & 0xff; /* Yes, src, not dst. */
1392 ea = rd & 0x80 ? -256 : 0;
1395 case O (O_EXTS, SL):
1396 rd = GET_W_REG (code->src.reg) & 0xffff;
1397 ea = rd & 0x8000 ? -65536 : 0;
1400 case O (O_EXTU, SW):
1401 rd = GET_B_REG (code->src.reg + 8) & 0xff;
1405 case O (O_EXTU, SL):
1406 rd = GET_W_REG (code->src.reg) & 0xffff;
1415 cpu.exception = SIGILL;
1427 /* When a branch works */
1428 pc = code->src.literal;
1431 /* Set the cond codes from res */
1434 /* Set the flags after an 8 bit inc/dec operation */
1438 v = (rd & 0x7f) == 0x7f;
1442 /* Set the flags after an 16 bit inc/dec operation */
1446 v = (rd & 0x7fff) == 0x7fff;
1450 /* Set the flags after an 32 bit inc/dec operation */
1452 n = res & 0x80000000;
1453 nz = res & 0xffffffff;
1454 v = (rd & 0x7fffffff) == 0x7fffffff;
1459 /* Set flags after an 8 bit shift op, carry,overflow set in insn */
1462 SET_B_REG (code->src.reg, rd);
1466 /* Set flags after an 16 bit shift op, carry,overflow set in insn */
1469 SET_W_REG (code->src.reg, rd);
1473 /* Set flags after an 32 bit shift op, carry,overflow set in insn */
1474 n = (rd & 0x80000000);
1475 nz = rd & 0xffffffff;
1476 SET_L_REG (code->src.reg, rd);
1480 store (&code->dst, res);
1482 /* flags after a 32bit logical operation */
1483 n = res & 0x80000000;
1484 nz = res & 0xffffffff;
1489 store (&code->dst, res);
1491 /* flags after a 16bit logical operation */
1499 store (&code->dst, res);
1507 SET_B_REG (code->dst.reg, res);
1512 switch (code->opcode / 4)
1515 v = ((rd & 0x80) == (ea & 0x80)
1516 && (rd & 0x80) != (res & 0x80));
1520 v = ((rd & 0x80) != (-ea & 0x80)
1521 && (rd & 0x80) != (res & 0x80));
1530 SET_W_REG (code->dst.reg, res);
1534 c = (res & 0x10000);
1535 switch (code->opcode / 4)
1538 v = ((rd & 0x8000) == (ea & 0x8000)
1539 && (rd & 0x8000) != (res & 0x8000));
1543 v = ((rd & 0x8000) != (-ea & 0x8000)
1544 && (rd & 0x8000) != (res & 0x8000));
1553 SET_L_REG (code->dst.reg, res);
1555 n = res & 0x80000000;
1556 nz = res & 0xffffffff;
1557 switch (code->opcode / 4)
1560 v = ((rd & 0x80000000) == (ea & 0x80000000)
1561 && (rd & 0x80000000) != (res & 0x80000000));
1565 v = ((rd & 0x80000000) != (-ea & 0x80000000)
1566 && (rd & 0x80000000) != (res & 0x80000000));
1569 v = (rd == 0x80000000);
1573 switch (code->opcode / 4)
1576 c = ((unsigned) res < (unsigned) rd) || ((unsigned) res < (unsigned) ea);
1580 c = (unsigned) rd < (unsigned) -ea;
1593 /* if (cpu.regs[8] ) abort(); */
1596 /* Poll after every 100th insn, */
1597 if (poll_count++ > 100)
1600 if (win32pollquit())
1606 #if defined(__GO32__)
1607 /* Poll after every 100th insn, */
1608 if (poll_count++ > 100)
1620 while (!cpu.exception);
1621 cpu.ticks += get_now () - tick_start;
1622 cpu.cycles += cycles;
1628 signal (SIGINT, prev);
1633 sim_write (addr, buffer, size)
1635 unsigned char *buffer;
1641 if (addr < 0 || addr + size > memory_size)
1643 for (i = 0; i < size; i++)
1645 cpu.memory[addr + i] = buffer[i];
1646 cpu.cache_idx[addr + i] = 0;
1652 sim_read (addr, buffer, size)
1654 unsigned char *buffer;
1658 if (addr < 0 || addr + size > memory_size)
1660 memcpy (buffer, cpu.memory + addr, size);
1674 #define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
1675 #define FP_REGNUM R6_REGNUM /* Contains address of executing
1678 #define CCR_REGNUM 8 /* Contains processor status */
1679 #define PC_REGNUM 9 /* Contains program counter */
1681 #define CYCLE_REGNUM 10
1682 #define INST_REGNUM 11
1683 #define TICK_REGNUM 12
1687 sim_store_register (rn, value)
1689 unsigned char *value;
1694 longval = (value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3];
1695 shortval = (value[0] << 8) | (value[1]);
1696 intval = h8300hmode ? longval : shortval;
1714 cpu.regs[rn] = intval;
1720 cpu.cycles = longval;
1724 cpu.insts = longval;
1728 cpu.ticks = longval;
1734 sim_fetch_register (rn, buf)
1776 if (h8300hmode || longreg)
1791 sim_stop_reason (reason, sigrc)
1792 enum sim_stop *reason;
1795 *reason = sim_stopped;
1796 *sigrc = cpu.exception;
1805 cpu.cache = (decoded_inst *) malloc (sizeof (decoded_inst) * n);
1806 memset (cpu.cache, 0, sizeof (decoded_inst) * n);
1815 double timetaken = (double) cpu.ticks / (double) now_persec ();
1816 double virttime = cpu.cycles / 10.0e6;
1818 printf_filtered ("\n\n#instructions executed %10d\n", cpu.insts);
1819 printf_filtered ("#cycles (v approximate) %10d\n", cpu.cycles);
1820 printf_filtered ("#real time taken %10.4f\n", timetaken);
1821 printf_filtered ("#virtual time taked %10.4f\n", virttime);
1822 if (timetaken != 0.0)
1823 printf_filtered ("#simulation ratio %10.4f\n", virttime / timetaken);
1824 printf_filtered ("#compiles %10d\n", cpu.compiles);
1825 printf_filtered ("#cache size %10d\n", cpu.csize);
1831 for (i = 0; i < O_LAST; i++)
1834 printf_filtered ("%d: %d\n", i, cpu.stats[i]);
1840 /* Indicate whether the cpu is an h8/300 or h8/300h.
1841 FLAG is non-zero for the h8/300h. */
1864 sim_close (quitting)
1870 /* Called by gdb to load a program into memory. */
1873 sim_load (prog, from_tty)
1879 /* See if the file is for the h8/300 or h8/300h. */
1880 /* ??? This may not be the most efficient way. The z8k simulator
1881 does this via a different mechanism (INIT_EXTRA_SYMTAB_INFO). */
1882 if ((abfd = bfd_openr (prog, "coff-h8300")) != 0)
1884 if (bfd_check_format (abfd, bfd_object))
1885 set_h8300h (abfd->arch_info->mach == bfd_mach_h8300h);
1889 /* Return non-zero so gdb will handle it. */
1894 sim_create_inferior (start_address, argv, env)
1895 SIM_ADDR start_address;
1899 cpu.pc = start_address;
1903 sim_do_command (cmd)
1906 printf_filtered ("This simulator does not accept any commands.\n");
1912 sim_set_callbacks (ptr)
1913 struct host_callback_struct *ptr;