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- /*
- * Simulator for the Hitachi H8/300 architecture.
- *
- * Written by Steve Chamberlain of Cygnus Support. sac@cygnus.com
- *
- * This file is part of H8/300 sim
- *
- *
- * THIS SOFTWARE IS NOT COPYRIGHTED
- *
- * Cygnus offers the following for use in the public domain. Cygnus makes no
- * warranty with regard to the software or its performance and the user
- * accepts the software "AS IS" with all faults.
- *
- * CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THIS
- * SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #include <signal.h>
- #include <sys/times.h>
- #include <sys/param.h>
- #include "ansidecl.h"
- #include "sysdep.h"
- #include "remote-sim.h"
- #include "bfd.h"
-
- int debug;
-
-
- #define X(op, size) op*4+size
-
- #define SP (h8300hmode ? SL:SW)
- #define SB 0
- #define SW 1
- #define SL 2
- #define OP_REG 1
- #define OP_DEC 2
- #define OP_DISP 3
- #define OP_INC 4
- #define OP_PCREL 5
- #define OP_MEM 6
- #define OP_CCR 7
- #define OP_IMM 8
- #define OP_ABS 10
- #define h8_opcodes ops
- #define DEFINE_TABLE
- #include "opcode/h8300.h"
-
- #include "inst.h"
-
- #define LOW_BYTE(x) ((x) & 0xff)
- #define HIGH_BYTE(x) (((x)>>8) & 0xff)
- #define P(X,Y) ((X<<8) | Y)
-
- #define BUILDSR() cpu.ccr = (N << 3) | (Z << 2) | (V<<1) | C;
-
- #define GETSR() \
- c = (cpu.ccr >> 0) & 1;\
- v = (cpu.ccr >> 1) & 1;\
- nz = !((cpu.ccr >> 2) & 1);\
- n = (cpu.ccr >> 3) & 1;
-
- #ifdef __CHAR_IS_SIGNED__
- #define SEXTCHAR(x) ((char)(x))
- #endif
-
- #ifndef SEXTCHAR
- #define SEXTCHAR(x) ((x & 0x80) ? (x | ~0xff):x)
- #endif
-
- #define UEXTCHAR(x) ((x) & 0xff)
- #define UEXTSHORT(x) ((x) & 0xffff)
- #define SEXTSHORT(x) ((short)(x))
-
- static cpu_state_type cpu;
-
- int h8300hmode = 0;
-
-
- static int
- get_now ()
- {
- struct tms b;
-
- return time (0);
- #if 0
- times (&b);
- return b.tms_utime + b.tms_stime;
- #endif
- }
-
- static int
- now_persec ()
- {
- return 1;
- }
-
-
- static int
- bitfrom (x)
- {
- switch (x & SIZE)
- {
- case L_8:
- return SB;
- case L_16:
- return SW;
- case L_32:
- return SL;
- case L_P:
- return h8300hmode ? SL : SW;
- }
- }
-
- static
- unsigned int
- lvalue (x, rn)
- {
- switch (x / 4)
- {
- case OP_DISP:
- if (rn == 8)
- {
- return X (OP_IMM, SP);
- }
- return X (OP_REG, SP);
-
- case OP_MEM:
-
- return X (OP_MEM, SP);
- default:
- abort ();
- }
- }
-
- static unsigned int
- decode (addr, data, dst)
- int addr;
- unsigned char *data;
- decoded_inst *dst;
-
- {
- int rs = 0;
- int rd = 0;
- int rdisp = 0;
- int abs = 0;
- int plen = 0;
-
- struct h8_opcode *q = h8_opcodes;
- int size = 0;
- dst->dst.type = -1;
- dst->src.type = -1;
- /* Find the exact opcode/arg combo */
- while (q->name)
- {
- op_type *nib;
- unsigned int len = 0;
-
- nib = q->data.nib;
-
- while (1)
- {
- op_type looking_for = *nib;
- int thisnib = data[len >> 1];
-
- thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
-
- if (looking_for < 16 && looking_for >= 0)
- {
- if (looking_for != thisnib)
- goto fail;
- }
- else
- {
- if ((int) looking_for & (int) B31)
- {
- if (!(((int) thisnib & 0x8) != 0))
- goto fail;
- looking_for = (op_type) ((int) looking_for & ~(int)
- B31);
- thisnib &= 0x7;
- }
- if ((int) looking_for & (int) B30)
- {
- if (!(((int) thisnib & 0x8) == 0))
- goto fail;
- looking_for = (op_type) ((int) looking_for & ~(int) B30);
- }
- if (looking_for & DBIT)
- {
- if ((looking_for & 5) != (thisnib & 5))
- goto fail;
- abs = (thisnib & 0x8) ? 2 : 1;
- }
- else if (looking_for & (REG | IND | INC | DEC))
- {
- if (looking_for & REG)
- {
- /*
- * Can work out size from the
- * register
- */
- size = bitfrom (looking_for);
- }
- if (looking_for & SRC)
- {
- rs = thisnib;
- }
- else
- {
- rd = thisnib;
- }
- }
- else if (looking_for & L_16)
- {
- abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1];
- plen = 16;
- if (looking_for & (PCREL | DISP))
- {
- abs = (short) (abs);
- }
- }
- else if (looking_for & ABSJMP)
- {
- abs =
- (data[1] << 16)
- | (data[2] << 8)
- | (data[3]);
- }
- else if (looking_for & MEMIND)
- {
- abs = data[1];
- }
- else if (looking_for & L_32)
- {
- int i = len >> 1;
- abs = (data[i] << 24)
- | (data[i + 1] << 16)
- | (data[i + 2] << 8)
- | (data[i + 3]);
-
- plen = 32;
- }
- else if (looking_for & L_24)
- {
- int i = len >> 1;
- abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
- plen = 24;
- }
- else if (looking_for & IGNORE)
- {
- /* nothing to do */
- }
- else if (looking_for & DISPREG)
- {
- rdisp = thisnib & 0x7;
- }
- else if (looking_for & KBIT)
- {
- switch (thisnib)
- {
- case 9:
- abs = 4;
- break;
- case 8:
- abs = 2;
- break;
- case 0:
- abs = 1;
- break;
- }
- }
- else if (looking_for & L_8)
- {
- plen = 8;
-
- if (looking_for & PCREL)
- {
- abs = SEXTCHAR (data[len >> 1]);
- }
- else
- {
- abs = data[len >> 1] & 0xff;
- }
- }
- else if (looking_for & L_3)
- {
- plen = 3;
-
- abs = thisnib;
- }
- else if (looking_for == E)
- {
- dst->op = q;
-
- /* Fill in the args */
- {
- op_type *args = q->args.nib;
- int hadone = 0;
-
- while (*args != E)
- {
- int x = *args;
- int rn = (x & DST) ? rd : rs;
- ea_type *p;
-
- if (x & DST)
- {
- p = &(dst->dst);
- }
- else
- {
- p = &(dst->src);
- }
-
- if (x & (IMM | KBIT | DBIT))
- {
- p->type = X (OP_IMM, size);
- p->literal = abs;
- }
- else if (x & REG)
- {
- /* Reset the size, some
- ops (like mul) have two sizes */
-
- size = bitfrom (x);
- p->type = X (OP_REG, size);
- p->reg = rn;
- }
- else if (x & INC)
- {
- p->type = X (OP_INC, size);
- p->reg = rn & 0x7;
- }
- else if (x & DEC)
- {
- p->type = X (OP_DEC, size);
- p->reg = rn & 0x7;
- }
- else if (x & IND)
- {
- p->type = X (OP_DISP, size);
- p->reg = rn & 0x7;
- p->literal = 0;
- }
- else if (x & (ABS | ABSJMP | ABSMOV))
- {
- p->type = X (OP_DISP, size);
- p->literal = abs;
- p->reg = 8;
- }
- else if (x & MEMIND)
- {
- p->type = X (OP_MEM, size);
- p->literal = abs;
- }
- else if (x & PCREL)
- {
- p->type = X (OP_PCREL, size);
- p->literal = abs + addr + 2;
- if (x & L_16)
- p->literal += 2;
- }
- else if (x & ABSJMP)
- {
- p->type = X (OP_IMM, SP);
- p->literal = abs;
- }
- else if (x & DISP)
- {
- p->type = X (OP_DISP, size);
- p->literal = abs;
- p->reg = rdisp & 0x7;
- }
- else if (x & CCR)
- {
- p->type = OP_CCR;
- }
- else
- printf ("Hmmmm %x", x);
-
- args++;
- }
- }
-
- /*
- * But a jmp or a jsr gets
- * automagically lvalued, since we
- * branch to their address not their
- * contents
- */
- if (q->how == O (O_JSR, SB)
- || q->how == O (O_JMP, SB))
- {
- dst->src.type = lvalue (dst->src.type, dst->src.reg);
- }
-
- if (dst->dst.type == -1)
- dst->dst = dst->src;
-
- dst->opcode = q->how;
- dst->cycles = q->time;
-
- /* And a jsr to 0xc4 is turned into a magic trap */
-
- if (dst->opcode == O (O_JSR, SB))
- {
- if (dst->src.literal == 0xc4)
- {
- dst->opcode = O (O_SYSCALL, SB);
- }
- }
-
- dst->next_pc = addr + len / 2;
- return;
- }
- else
- {
- printf ("Dont understand %x \n", looking_for);
- }
- }
-
- len++;
- nib++;
- }
-
- fail:
- q++;
- }
-
- dst->opcode = O (O_ILL, SB);
- }
-
-
- static void
- compile (pc)
- {
- int idx;
-
- /* find the next cache entry to use */
-
- idx = cpu.cache_top + 1;
- cpu.compiles++;
- if (idx >= cpu.csize)
- {
- idx = 1;
- }
- cpu.cache_top = idx;
-
- /* Throw away its old meaning */
- cpu.cache_idx[cpu.cache[idx].oldpc] = 0;
-
- /* set to new address */
- cpu.cache[idx].oldpc = pc;
-
- /* fill in instruction info */
- decode (pc, cpu.memory + pc, cpu.cache + idx);
-
- /* point to new cache entry */
- cpu.cache_idx[pc] = idx;
- }
-
-
- static unsigned char *breg[18];
- static unsigned short *wreg[18];
- static unsigned int *lreg[18];
-
- #define GET_B_REG(x) *(breg[x])
- #define SET_B_REG(x,y) (*(breg[x])) = (y)
- #define GET_W_REG(x) *(wreg[x])
- #define SET_W_REG(x,y) (*(wreg[x])) = (y)
-
- #define GET_L_REG(x) *(lreg[x])
- #define SET_L_REG(x,y) (*(lreg[x])) = (y)
-
- #define GET_MEMORY_L(x) \
- ((cpu.memory[x+0] << 24) | (cpu.memory[x+1] << 16) | (cpu.memory[x+2] << 8) | cpu.memory[x+3])
-
- #define GET_MEMORY_W(x) \
- ((cpu.memory[x+0] << 8) | (cpu.memory[x+1] << 0))
-
-
- #define SET_MEMORY_B(x,y) \
- (cpu.memory[(x)] = y)
-
- #define SET_MEMORY_W(x,y) \
- {register unsigned char *_p = cpu.memory+x;\
- register int __y = y;\
- _p[0] = (__y)>>8;\
- _p[1] =(__y); }
-
- #define SET_MEMORY_L(x,y) \
- {register unsigned char *_p = cpu.memory+x;register int __y = y;\
- _p[0] = (__y)>>24; _p[1] = (__y)>>16; _p[2] = (__y)>>8; _p[3] = (__y)>>0;}
-
- #define GET_MEMORY_B(x) (cpu.memory[x])
-
- int
- fetch (arg, n)
- ea_type *arg;
- {
- int rn = arg->reg;
- int abs = arg->literal;
- int r;
- int t;
-
- switch (arg->type)
- {
- case X (OP_REG, SB):
- return GET_B_REG (rn);
- case X (OP_REG, SW):
- return GET_W_REG (rn);
- case X (OP_REG, SL):
- return GET_L_REG (rn);
- case X (OP_IMM, SB):
- case X (OP_IMM, SW):
- case X (OP_IMM, SL):
- return abs;
- case X (OP_DEC, SB):
- abort ();
-
- case X (OP_INC, SB):
- t = GET_L_REG (rn);
- t &= cpu.mask;
- r = GET_MEMORY_B (t);
- t++;
- t = t & cpu.mask;
- SET_L_REG (rn, t);
- return r;
- break;
- case X (OP_INC, SW):
- t = GET_L_REG (rn);
- t &= cpu.mask;
- r = GET_MEMORY_W (t);
- t += 2;
- t = t & cpu.mask;
- SET_L_REG (rn, t);
- return r;
- case X (OP_INC, SL):
- t = GET_L_REG (rn);
- t &= cpu.mask;
- r = GET_MEMORY_L (t);
-
- t += 4;
- t = t & cpu.mask;
- SET_L_REG (rn, t);
- return r;
-
- case X (OP_DISP, SB):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- return GET_MEMORY_B (t);
-
- case X (OP_DISP, SW):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- return GET_MEMORY_W (t);
-
- case X (OP_DISP, SL):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- return GET_MEMORY_L (t);
-
- case X (OP_MEM, SL):
- t = GET_MEMORY_L (abs);
- t &= cpu.mask;
- return t;
-
- default:
- abort ();
-
- }
- }
-
-
- static
- void
- store (arg, n)
- ea_type *arg;
- int n;
- {
- int rn = arg->reg;
- int abs = arg->literal;
- int t;
-
- switch (arg->type)
- {
- case X (OP_REG, SB):
- SET_B_REG (rn, n);
- break;
- case X (OP_REG, SW):
- SET_W_REG (rn, n);
- break;
- case X (OP_REG, SL):
- SET_L_REG (rn, n);
- break;
-
- case X (OP_DEC, SB):
- t = GET_L_REG (rn) - 1;
- t &= cpu.mask;
- SET_L_REG (rn, t);
- SET_MEMORY_B (t, n);
-
- break;
- case X (OP_DEC, SW):
- t = (GET_L_REG (rn) - 2) & cpu.mask;
- SET_L_REG (rn, t);
- SET_MEMORY_W (t, n);
- break;
-
- case X (OP_DEC, SL):
- t = (GET_L_REG (rn) - 4) & cpu.mask;
- SET_L_REG (rn, t);
- SET_MEMORY_L (t, n);
- break;
-
- case X (OP_DISP, SB):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- SET_MEMORY_B (t, n);
- break;
-
- case X (OP_DISP, SW):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- SET_MEMORY_W (t, n);
- break;
-
- case X (OP_DISP, SL):
- t = GET_L_REG (rn) + abs;
- t &= cpu.mask;
- SET_MEMORY_L (t, n);
- break;
- default:
- abort ();
- }
- }
-
-
- static union
- {
- short int i;
- struct
- {
- char low;
- char high;
- }
- u;
- }
-
- littleendian;
-
- static
- void
- init_pointers ()
- {
- static int init;
-
- if (!init)
- {
- int i;
-
- init = 1;
- littleendian.i = 1;
-
- cpu.memory = (unsigned char *) calloc (sizeof (char), MSIZE);
- cpu.cache_idx = (unsigned short *) calloc (sizeof (short), MSIZE);
- cpu.mask = (1 << MPOWER) - 1;
-
- for (i = 0; i < 9; i++)
- {
- cpu.regs[i] = 0;
- }
-
- for (i = 0; i < 8; i++)
- {
- unsigned char *p = (unsigned char *) (cpu.regs + i);
- unsigned char *e = (unsigned char *) (cpu.regs + i + 1);
- unsigned short *q = (unsigned short *) (cpu.regs + i);
- unsigned short *u = (unsigned short *) (cpu.regs + i + 1);
- cpu.regs[i] = 0x00112233;
- while (p < e)
- {
- if (*p == 0x22)
- {
- breg[i] = p;
- }
- if (*p == 0x33)
- {
- breg[i + 8] = p;
- }
- p++;
- }
- while (q < u)
- {
- if (*q == 0x2233)
- {
- wreg[i] = q;
- }
- if (*q == 0x0011)
- {
- wreg[i + 8] = q;
- }
- q++;
- }
- cpu.regs[i] = 0;
- lreg[i] = &cpu.regs[i];
- }
-
- lreg[8] = &cpu.regs[8];
-
- /* initialize the seg registers */
- if (!cpu.cache)
- sim_csize (CSIZE);
- }
- }
-
- static void
- control_c (sig, code, scp, addr)
- int sig;
- int code;
- char *scp;
- char *addr;
- {
- cpu.exception = SIGINT;
- }
-
- #define C (c != 0)
- #define Z (nz == 0)
- #define V (v != 0)
- #define N (n != 0)
-
- static int
- mop (code, bsize, sign)
- decoded_inst *code;
- int bsize;
- int sign;
- {
- int multiplier;
- int multiplicand;
- int result;
- int n, nz;
-
- if (sign)
- {
- multiplicand =
- bsize ? SEXTCHAR (GET_W_REG (code->dst.reg)) :
- SEXTSHORT (GET_W_REG (code->dst.reg));
- multiplier =
- bsize ? SEXTCHAR (GET_B_REG (code->src.reg)) :
- SEXTSHORT (GET_W_REG (code->src.reg));
- }
- else
- {
- multiplicand = bsize ? UEXTCHAR (GET_W_REG (code->dst.reg)) :
- UEXTSHORT (GET_W_REG (code->dst.reg));
- multiplier =
- bsize ? UEXTCHAR (GET_B_REG (code->src.reg)) :
- UEXTSHORT (GET_W_REG (code->src.reg));
-
- }
- result = multiplier * multiplicand;
-
- if (sign)
- {
- n = result & (bsize ? 0x8000 : 0x80000000);
- nz = result & (bsize ? 0xffff : 0xffffffff);
- }
- if (bsize)
- {
- SET_W_REG (code->dst.reg, result);
- }
- else
- {
- SET_L_REG (code->dst.reg, result);
- }
- /* return ((n==1) << 1) | (nz==1); */
-
- }
-
- #define OSHIFTS(name, how) \
- case O(name, SB): \
- { \
- int t; \
- int hm = 0x80; \
- rd = GET_B_REG (code->src.reg); \
- how; \
- goto shift8; \
- } \
- case O(name, SW): \
- { \
- int t; \
- int hm = 0x8000; \
- rd = GET_W_REG (code->src.reg); \
- how; \
- goto shift16; \
- } \
- case O(name, SL): \
- { \
- int t; \
- int hm = 0x80000000; \
- rd = GET_L_REG (code->src.reg); \
- how; \
- goto shift32; \
- }
-
- #define OBITOP(name,f, s, op) \
- case O(name, SB): \
- { \
- int m; \
- int b; \
- if (f) ea = fetch (&code->dst); \
- m=1<< fetch(&code->src); \
- op; \
- if(s) store (&code->dst,ea); goto next; \
- }
-
- void
- sim_resume (step, siggnal)
- {
- static int init1;
- int cycles = 0;
- int insts = 0;
- int tick_start = get_now ();
- void (*prev) ();
- int poll_count = 0;
- int res;
- int tmp;
- int rd;
- int ea;
- int bit;
- int pc;
- int c, nz, v, n;
-
- init_pointers ();
-
- prev = signal (SIGINT, control_c);
-
- if (step)
- {
- cpu.exception = SIGTRAP;
- }
- else
- {
- cpu.exception = 0;
- }
-
- pc = cpu.pc;
-
- GETSR ();
-
- do
- {
- int cidx;
- decoded_inst *code;
-
- top:
- cidx = cpu.cache_idx[pc];
- code = cpu.cache + cidx;
-
-
- #define ALUOP(STORE, NAME, HOW) \
- case O(NAME,SB): HOW; if(STORE)goto alu8;else goto just_flags_alu8; \
- case O(NAME, SW): HOW; if(STORE)goto alu16;else goto just_flags_alu16; \
- case O(NAME,SL): HOW; if(STORE)goto alu32;else goto just_flags_alu32;
-
-
- #define LOGOP(NAME, HOW) \
- case O(NAME,SB): HOW; goto log8;\
- case O(NAME, SW): HOW; goto log16;\
- case O(NAME,SL): HOW; goto log32;
-
-
-
- #if ADEBUG
- if (debug)
- {
- printf ("%x %d %s\n", pc, code->opcode,
- code->op ? code->op->name : "**");
- }
- cpu.stats[code->opcode]++;
-
- #endif
-
- cycles += code->cycles;
- insts++;
- switch (code->opcode)
- {
- case 0:
- /*
- * This opcode is a fake for when we get to an
- * instruction which hasnt been compiled
- */
- compile (pc);
- goto top;
- break;
-
-
- case O (O_SUBX, SB):
- rd = fetch (&code->dst);
- ea = fetch (&code->src);
- ea = -(ea + C);
- res = rd + ea;
- goto alu8;
-
- case O (O_ADDX, SB):
- rd = fetch (&code->dst);
- ea = fetch (&code->src);
- ea = C + ea;
- res = rd + ea;
- goto alu8;
-
- #define EA ea = fetch(&code->src);
- #define RD_EA ea = fetch(&code->src); rd = fetch(&code->dst);
-
- ALUOP (1, O_SUB, RD_EA;
- ea = -ea;
- res = rd + ea);
- ALUOP (1, O_NEG, EA;
- ea = -ea;
- rd = 0;
- res = rd + ea);
-
- case O (O_ADD, SB):
- rd = GET_B_REG (code->dst.reg);
- ea = fetch (&code->src);
- res = rd + ea;
- goto alu8;
- case O (O_ADD, SW):
- rd = GET_W_REG (code->dst.reg);
- ea = fetch (&code->src);
- res = rd + ea;
- goto alu16;
- case O (O_ADD, SL):
- rd = GET_L_REG (code->dst.reg);
- ea = fetch (&code->src);
- res = rd + ea;
- goto alu32;
-
-
- LOGOP (O_AND, RD_EA;
- res = rd & ea);
-
- LOGOP (O_OR, RD_EA;
- res = rd | ea);
-
- LOGOP (O_XOR, RD_EA;
- res = rd ^ ea);
-
-
- case O (O_MOV_TO_MEM, SB):
- res = GET_B_REG (code->src.reg);
- goto log8;
- case O (O_MOV_TO_MEM, SW):
- res = GET_W_REG (code->src.reg);
- goto log16;
- case O (O_MOV_TO_MEM, SL):
- res = GET_L_REG (code->src.reg);
- goto log32;
-
-
- case O (O_MOV_TO_REG, SB):
- res = fetch (&code->src);
- SET_B_REG (code->dst.reg, res);
- goto just_flags_log8;
- case O (O_MOV_TO_REG, SW):
- res = fetch (&code->src);
- SET_W_REG (code->dst.reg, res);
- goto just_flags_log16;
- case O (O_MOV_TO_REG, SL):
- res = fetch (&code->src);
- SET_L_REG (code->dst.reg, res);
- goto just_flags_log32;
-
-
- case O (O_ADDS, SL):
- SET_L_REG (code->dst.reg,
- GET_L_REG (code->dst.reg)
- + code->src.literal);
-
- goto next;
-
- case O (O_SUBS, SL):
- SET_L_REG (code->dst.reg,
- GET_L_REG (code->dst.reg)
- - code->src.literal);
- goto next;
-
- case O (O_CMP, SB):
- rd = fetch (&code->dst);
- ea = fetch (&code->src);
- ea = -ea;
- res = rd + ea;
- goto just_flags_alu8;
-
- case O (O_CMP, SW):
- rd = fetch (&code->dst);
- ea = fetch (&code->src);
- ea = -ea;
- res = rd + ea;
- goto just_flags_alu16;
-
- case O (O_CMP, SL):
- rd = fetch (&code->dst);
- ea = fetch (&code->src);
- ea = -ea;
- res = rd + ea;
- goto just_flags_alu32;
-
-
- case O (O_DEC, SB):
- rd = GET_B_REG (code->src.reg);
- ea = -1;
- res = rd + ea;
- SET_B_REG (code->src.reg, res);
- goto just_flags_inc8;
-
- case O (O_DEC, SW):
- rd = GET_W_REG (code->dst.reg);
- ea = -code->src.literal;
- res = rd + ea;
- SET_W_REG (code->dst.reg, res);
- goto just_flags_inc16;
-
- case O (O_DEC, SL):
- rd = GET_L_REG (code->dst.reg);
- ea = -code->src.literal;
- res = rd + ea;
- SET_L_REG (code->dst.reg, res);
- goto just_flags_inc32;
-
-
- case O (O_INC, SB):
- rd = GET_B_REG (code->src.reg);
- ea = 1;
- res = rd + ea;
- SET_B_REG (code->src.reg, res);
- goto just_flags_inc8;
-
- case O (O_INC, SW):
- rd = GET_W_REG (code->dst.reg);
- ea = code->src.literal;
- res = rd + ea;
- SET_W_REG (code->dst.reg, res);
- goto just_flags_inc16;
-
- case O (O_INC, SL):
- rd = GET_L_REG (code->dst.reg);
- ea = code->src.literal;
- res = rd + ea;
- SET_L_REG (code->dst.reg, res);
- goto just_flags_inc32;
-
-
- #define GET_CCR(x) BUILDSR();x = cpu.ccr
-
- case O (O_ANDC, SB):
- GET_CCR (rd);
- ea = code->src.literal;
- res = rd & ea;
- goto setc;
-
- case O (O_ORC, SB):
- GET_CCR (rd);
- ea = code->src.literal;
- res = rd | ea;
- goto setc;
-
- case O (O_XORC, SB):
- GET_CCR (rd);
- ea = code->src.literal;
- res = rd ^ ea;
- goto setc;
-
-
- case O (O_BRA, SB):
- if (1)
- goto condtrue;
- goto next;
-
- case O (O_BRN, SB):
- if (0)
- goto condtrue;
- goto next;
-
- case O (O_BHI, SB):
- if ((C || Z) == 0)
- goto condtrue;
- goto next;
-
-
- case O (O_BLS, SB):
- if ((C || Z))
- goto condtrue;
- goto next;
-
- case O (O_BCS, SB):
- if ((C == 1))
- goto condtrue;
- goto next;
-
- case O (O_BCC, SB):
- if ((C == 0))
- goto condtrue;
- goto next;
-
- case O (O_BEQ, SB):
- if (Z)
- goto condtrue;
- goto next;
- case O (O_BGT, SB):
- if (((Z || (N ^ V)) == 0))
- goto condtrue;
- goto next;
-
-
- case O (O_BLE, SB):
- if (((Z || (N ^ V)) == 1))
- goto condtrue;
- goto next;
-
- case O (O_BGE, SB):
- if ((N ^ V) == 0)
- goto condtrue;
- goto next;
- case O (O_BLT, SB):
- if ((N ^ V))
- goto condtrue;
- goto next;
- case O (O_BMI, SB):
- if ((N))
- goto condtrue;
- goto next;
- case O (O_BNE, SB):
- if ((Z == 0))
- goto condtrue;
- goto next;
-
- case O (O_BPL, SB):
- if (N == 0)
- goto condtrue;
- goto next;
- case O (O_BVC, SB):
- if ((V == 0))
- goto condtrue;
- goto next;
- case O (O_BVS, SB):
- if ((V == 1))
- goto condtrue;
- goto next;
-
- case O (O_SYSCALL, SB):
- printf ("%c", cpu.regs[2]);
- goto next;
-
- OSHIFTS (O_NOT, rd = ~rd);
- OSHIFTS (O_SHLL, c = rd & hm;
- rd <<= 1);
- OSHIFTS (O_SHLR, c = rd & 1;
- rd = (unsigned int) rd >> 1);
- OSHIFTS (O_SHAL, c = rd & hm;
- rd <<= 1);
- OSHIFTS (O_SHAR, t = rd & hm;
- c = rd & 1;
- rd >>= 1;
- rd |= t;
- );
- OSHIFTS (O_ROTL, c = rd & hm;
- rd <<= 1;
- rd |= C);
- OSHIFTS (O_ROTR, c = rd & 1;
- rd = (unsigned int) rd >> 1;
- if (c) rd |= hm;);
- OSHIFTS (O_ROTXL, t = rd & hm;
- rd <<= 1;
- rd |= C;
- c = t;
- );
- OSHIFTS (O_ROTXR, t = rd & 1;
- rd = (unsigned int) rd >> 1;
- if (C) rd |= hm; c = t;);
-
- case O (O_JMP, SB):
- {
- pc = fetch (&code->src);
- goto end;
-
- }
-
- case O (O_JSR, SB):
- {
- int tmp;
- pc = fetch (&code->src);
- call:
- tmp = cpu.regs[7];
-
- if (h8300hmode)
- {
- tmp -= 4;
- SET_MEMORY_L (tmp, code->next_pc);
- }
- else
- {
- tmp -= 2;
- SET_MEMORY_W (tmp, code->next_pc);
- }
- cpu.regs[7] = tmp;
-
- goto end;
- }
- case O (O_BSR, SB):
- pc = code->src.literal;
- goto call;
-
- case O (O_RTS, SB):
- {
- int tmp;
-
- tmp = cpu.regs[7];
-
- if (h8300hmode)
- {
- pc = GET_MEMORY_L (tmp);
- tmp += 4;
- }
- else
- {
- pc = GET_MEMORY_W (tmp);
- tmp += 2;
- }
-
- cpu.regs[7] = tmp;
- goto end;
- }
-
- case O (O_ILL, SB):
- cpu.exception = SIGILL;
- goto end;
- case O (O_SLEEP, SB):
- case O (O_BPT, SB):
- cpu.exception = SIGTRAP;
- goto end;
-
- OBITOP (O_BNOT, 1, 1, ea ^= m);
- OBITOP (O_BTST, 1, 0, nz = ea & m);
- OBITOP (O_BCLR, 1, 1, ea &= ~m);
- OBITOP (O_BSET, 1, 1, ea |= m);
- OBITOP (O_BLD, 1, 0, c = ea & m);
- OBITOP (O_BILD, 1, 0, c = !(ea & m));
- OBITOP (O_BST, 1, 1, ea &= ~m;
- if (C) ea |= m);
- OBITOP (O_BIST, 1, 1, ea &= ~m;
- if (!C) ea |= m);
- OBITOP (O_BAND, 1, 0, c = (ea & m) && C);
- OBITOP (O_BIAND, 1, 0, c = !(ea & m) && C);
- OBITOP (O_BOR, 1, 0, c = (ea & m) || C);
- OBITOP (O_BIOR, 1, 0, c = !(ea & m) || C);
- OBITOP (O_BXOR, 1, 0, c = (ea & m) != C);
- OBITOP (O_BIXOR, 1, 0, c = !(ea & m) != C);
-
-
- #define MOP(bsize, signed) mop(code, bsize,signed); goto next;
-
- case O (O_MULS, SB):
- MOP (1, 1);
- break;
- case O (O_MULS, SW):
- MOP (0, 1);
- break;
- case O (O_MULU, SB):
- MOP (1, 0);
- break;
- case O (O_MULU, SW):
- MOP (0, 0);
- break;
-
-
- case O (O_DIVU, SB):
- {
- rd = GET_W_REG (code->dst.reg);
- ea = GET_B_REG (code->src.reg);
- if (ea)
- {
- tmp = rd % ea;
- rd = rd / ea;
- }
- SET_W_REG (code->dst.reg, (rd & 0xff) | (tmp << 8));
- n = ea & 0x80;
- nz = ea & 0xff;
-
- goto next;
- }
- case O (O_DIVU, SW):
- {
- rd = GET_L_REG (code->dst.reg);
- ea = GET_W_REG (code->src.reg);
- n = ea & 0x8000;
- nz = ea & 0xffff;
- if (ea)
- {
- tmp = rd % ea;
- rd = rd / ea;
- }
- SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
- goto next;
- }
-
- case O (O_DIVS, SB):
- {
-
- rd = SEXTSHORT (GET_W_REG (code->dst.reg));
- ea = SEXTCHAR (GET_B_REG (code->src.reg));
- if (ea)
- {
- tmp = (int) rd % (int) ea;
- rd = (int) rd / (int) ea;
- n = rd & 0x8000;
- nz = 1;
- }
- else
- nz = 0;
- SET_W_REG (code->dst.reg, (rd & 0xff) | (tmp << 8));
- goto next;
- }
- case O (O_DIVS, SW):
- {
- rd = GET_L_REG (code->dst.reg);
- ea = SEXTSHORT (GET_W_REG (code->src.reg));
- if (ea)
- {
- tmp = (int) rd % (int) ea;
- rd = (int) rd / (int) ea;
- n = rd & 0x80000000;
- nz = 1;
- }
- else
- nz = 0;
- SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
- goto next;
- }
- case O (O_EXTS, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff; /* Yes, src, not dst. */
- ea = rd & 0x80 ? -256 : 0;
- res = rd + ea;
- goto log16;
- case O (O_EXTS, SL):
- rd = GET_W_REG (code->src.reg) & 0xffff;
- ea = rd & 0x8000 ? -65536 : 0;
- res = rd + ea;
- goto log32;
- case O (O_EXTU, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff;
- ea = 0;
- res = rd + ea;
- goto log16;
- case O (O_EXTU, SL):
- rd = GET_W_REG (code->src.reg) & 0xffff;
- ea = 0;
- res = rd + ea;
- goto log32;
-
- case O (O_NOP, SB):
- goto next;
-
- default:
- cpu.exception = SIGILL;
- goto end;
-
- }
- abort ();
-
- setc:
- cpu.ccr = res;
- GETSR ();
- goto next;
-
- condtrue:
- /* When a branch works */
- pc = code->src.literal;
- goto end;
-
- /* Set the cond codes from res */
- bitop:
-
- /* Set the flags after an 8 bit inc/dec operation */
- just_flags_inc8:
- n = res & 0x80;
- nz = res & 0xff;
- v = (rd & 0x7f) == 0x7f;
- goto next;
-
-
- /* Set the flags after an 16 bit inc/dec operation */
- just_flags_inc16:
- n = res & 0x8000;
- nz = res & 0xffff;
- v = (rd & 0x7fff) == 0x7fff;
- goto next;
-
-
- /* Set the flags after an 32 bit inc/dec operation */
- just_flags_inc32:
- n = res & 0x80000000;
- nz = res & 0xffffffff;
- v = (rd & 0x7fffffff) == 0x7fffffff;
- goto next;
-
-
- shift8:
- /* Set flags after an 8 bit shift op, carry set in insn */
- n = (rd & 0x80);
- v = 0;
- nz = rd & 0xff;
- SET_B_REG (code->src.reg, rd);
- goto next;
-
-
- shift16:
- /* Set flags after an 16 bit shift op, carry set in insn */
- n = (rd & 0x8000);
- v = 0;
- nz = rd & 0xffff;
-
- SET_W_REG (code->src.reg, rd);
- goto next;
-
- shift32:
- /* Set flags after an 32 bit shift op, carry set in insn */
- n = (rd & 0x80000000);
- v = 0;
- nz = rd & 0xffffffff;
- SET_L_REG (code->src.reg, rd);
- goto next;
-
- log32:
- store (&code->dst, res);
- just_flags_log32:
- /* flags after a 32bit logical operation */
- n = res & 0x80000000;
- nz = res & 0xffffffff;
- v = 0;
- goto next;
-
- log16:
- store (&code->dst, res);
- just_flags_log16:
- /* flags after a 16bit logical operation */
- n = res & 0x8000;
- nz = res & 0xffff;
- v = 0;
- goto next;
-
-
- log8:
- store (&code->dst, res);
- just_flags_log8:
- n = res & 0x80;
- nz = res & 0xff;
- v = 0;
- goto next;
-
- alu8:
- SET_B_REG (code->dst.reg, res);
- just_flags_alu8:
- n = res & 0x80;
- nz = res & 0xff;
- v = ((ea & 0x80) == (rd & 0x80)) && ((ea & 0x80) != (res & 0x80));
- c = (res & 0x100);
- goto next;
-
- alu16:
- SET_W_REG (code->dst.reg, res);
- just_flags_alu16:
- n = res & 0x8000;
- nz = res & 0xffff;
- v = ((ea & 0x8000) == (rd & 0x8000)) && ((ea & 0x8000) != (res & 0x8000));
- c = (res & 0x10000);
- goto next;
-
- alu32:
- SET_L_REG (code->dst.reg, res);
- just_flags_alu32:
- n = res & 0x80000000;
- nz = res & 0xffffffff;
- v = ((ea & 0x80000000) == (rd & 0x80000000))
- && ((ea & 0x80000000) != (res & 0x80000000));
- switch (code->opcode / 4)
- {
- case O_ADD:
- c = ((unsigned) res < (unsigned) rd) || ((unsigned) res < (unsigned) ea);
- break;
- case O_SUB:
- case O_CMP:
- c = (unsigned) rd < (unsigned) -ea;
- break;
- case O_NEG:
- c = res != 0;
- break;
- }
- goto next;
-
- next:;
- pc = code->next_pc;
-
- end:
- ;
- /* if (cpu.regs[8] ) abort(); */
-
- #ifdef __GO32__
- /* Poll after every 100th insn, */
- if (poll_count++ > 100)
- {
- poll_count = 0;
- if (kbhit ())
- {
- int c = getkey ();
- control_c ();
- }
- }
- #endif
-
- }
- while (!cpu.exception);
- cpu.ticks += get_now () - tick_start;
- cpu.cycles += cycles;
- cpu.insts += insts;
-
- cpu.pc = pc;
- BUILDSR ();
-
- signal (SIGINT, prev);
- }
-
-
- int
- sim_write (addr, buffer, size)
- SIM_ADDR addr;
- unsigned char *buffer;
- int size;
- {
- int i;
-
- init_pointers ();
- if (addr < 0 || addr + size > MSIZE)
- return 0;
- for (i = 0; i < size; i++)
- {
- cpu.memory[addr + i] = buffer[i];
- cpu.cache_idx[addr + i] = 0;
- }
- return size;
- }
-
- int
- sim_read (addr, buffer, size)
- SIM_ADDR addr;
- unsigned char *buffer;
- int size;
- {
- init_pointers ();
- if (addr < 0 || addr + size > MSIZE)
- return 0;
- memcpy (buffer, cpu.memory + addr, size);
- return size;
- }
-
-
- #define R0_REGNUM 0
- #define R1_REGNUM 1
- #define R2_REGNUM 2
- #define R3_REGNUM 3
- #define R4_REGNUM 4
- #define R5_REGNUM 5
- #define R6_REGNUM 6
- #define R7_REGNUM 7
-
- #define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
- #define FP_REGNUM R6_REGNUM /* Contains address of executing
- * stack frame */
-
- #define CCR_REGNUM 8 /* Contains processor status */
- #define PC_REGNUM 9 /* Contains program counter */
-
- #define CYCLE_REGNUM 10
- #define INST_REGNUM 11
- #define TICK_REGNUM 12
-
-
- void
- sim_store_register (rn, value)
- int rn;
- unsigned char *value;
- {
- int longval;
- int shortval;
- int intval;
- longval = (value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3];
- shortval = (value[0] << 8) | (value[1]);
- intval = h8300hmode ? longval : shortval;
-
- init_pointers ();
- switch (rn)
- {
- case PC_REGNUM:
- cpu.pc = intval;
- break;
- default:
- abort ();
- case R0_REGNUM:
- case R1_REGNUM:
- case R2_REGNUM:
- case R3_REGNUM:
- case R4_REGNUM:
- case R5_REGNUM:
- case R6_REGNUM:
- case R7_REGNUM:
- cpu.regs[rn] = intval;
- break;
- case CCR_REGNUM:
- cpu.ccr = intval;
- break;
- case CYCLE_REGNUM:
- cpu.cycles = longval;
- break;
-
- case INST_REGNUM:
- cpu.insts = longval;
- break;
-
- case TICK_REGNUM:
- cpu.ticks = longval;
- break;
- }
- }
-
- void
- sim_fetch_register (rn, buf)
- int rn;
- unsigned char *buf;
- {
- int v;
- int longreg = 0;
-
- init_pointers ();
-
- switch (rn)
- {
- default:
- abort ();
- case 8:
- v = cpu.ccr;
- break;
- case 9:
- v = cpu.pc;
- break;
- case R0_REGNUM:
- case R1_REGNUM:
- case R2_REGNUM:
- case R3_REGNUM:
- case R4_REGNUM:
- case R5_REGNUM:
- case R6_REGNUM:
- case R7_REGNUM:
- v = cpu.regs[rn];
- break;
- case 10:
- v = cpu.cycles;
- longreg = 1;
- break;
- case 11:
- v = cpu.ticks;
- longreg = 1;
- break;
- case 12:
- v = cpu.insts;
- longreg = 1;
- break;
- }
- if (h8300hmode || longreg)
- {
- buf[0] = v >> 24;
- buf[1] = v >> 16;
- buf[2] = v >> 8;
- buf[3] = v >> 0;
- }
- else
- {
- buf[0] = v >> 8;
- buf[1] = v;
- }
- }
-
- void
- sim_stop_reason (reason, sigrc)
- enum sim_stop *reason;
- int *sigrc;
- {
- *reason = sim_stopped;
- *sigrc = cpu.exception;
- }
-
- sim_csize (n)
- {
- if (cpu.cache)
- free (cpu.cache);
- if (n < 2)
- n = 2;
- cpu.cache = (decoded_inst *) malloc (sizeof (decoded_inst) * n);
- memset (cpu.cache, 0, sizeof (decoded_inst) * n);
- cpu.csize = n;
- }
-
-
- void
- sim_info (verbose)
- int verbose;
- {
- double timetaken = (double) cpu.ticks / (double) now_persec ();
- double virttime = cpu.cycles / 10.0e6;
-
- printf_filtered ("\n\n#instructions executed %10d\n", cpu.insts);
- printf_filtered ("#cycles (v approximate) %10d\n", cpu.cycles);
- printf_filtered ("#real time taken %10.4f\n", timetaken);
- printf_filtered ("#virtual time taked %10.4f\n", virttime);
- if (timetaken != 0.0)
- printf_filtered ("#simulation ratio %10.4f\n", virttime / timetaken);
- printf_filtered ("#compiles %10d\n", cpu.compiles);
- printf_filtered ("#cache size %10d\n", cpu.csize);
-
- #ifdef ADEBUG
- if (verbose)
- {
- int i;
- for (i = 0; i < O_LAST; i++)
- {
- if (cpu.stats[i])
- printf_filtered ("%d: %d\n", i, cpu.stats[i]);
- }
- }
- #endif
- }
-
- /* Indicate whether the cpu is an h8/300 or h8/300h.
- FLAG is non-zero for the h8/300h. */
-
- void
- set_h8300h (flag)
- int flag;
- {
- h8300hmode = flag;
- }
-
- void
- sim_kill ()
- {
- /* nothing to do */
- }
-
- void
- sim_open (args)
- char *args;
- {
- /* nothing to do */
- }
-
- void
- sim_close (quitting)
- int quitting;
- {
- /* nothing to do */
- }
-
- /* Called by gdb to load a program into memory. */
-
- int
- sim_load (prog, from_tty)
- char *prog;
- int from_tty;
- {
- bfd *abfd;
-
- /* See if the file is for the h8/300 or h8/300h. */
- /* ??? This may not be the most efficient way. The z8k simulator
- does this via a different mechanism (INIT_EXTRA_SYMTAB_INFO). */
- if ((abfd = bfd_openr (prog, "coff-h8300")) != 0)
- {
- if (bfd_check_format (abfd, bfd_object))
- set_h8300h (abfd->arch_info->mach == bfd_mach_h8300h);
- bfd_close (abfd);
- }
-
- /* Return non-zero so gdb will handle it. */
- return 1;
- }
-
- void
- sim_create_inferior (start_address, argv, env)
- SIM_ADDR start_address;
- char **argv;
- char **env;
- {
- cpu.pc = start_address;
- }
-