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author | David Edelsohn <dje.gcc@gmail.com> | 1993-07-04 07:37:45 +0000 |
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committer | David Edelsohn <dje.gcc@gmail.com> | 1993-07-04 07:37:45 +0000 |
commit | ce51bde687e425bc68aad11c347197a28e2726dd (patch) | |
tree | fd71bd26a047784454b01e0ca0aa375a552f5f1e /sim/h8300 | |
parent | a5b5f81d79b9b8032b28d0e0b3dd7c34572bb2bf (diff) | |
download | gdb-ce51bde687e425bc68aad11c347197a28e2726dd.zip gdb-ce51bde687e425bc68aad11c347197a28e2726dd.tar.gz gdb-ce51bde687e425bc68aad11c347197a28e2726dd.tar.bz2 |
(sim_csize): Initialize cpu.cache.
Diffstat (limited to 'sim/h8300')
-rw-r--r-- | sim/h8300/ChangeLog | 4 | ||||
-rw-r--r-- | sim/h8300/compile.c | 1637 |
2 files changed, 1641 insertions, 0 deletions
diff --git a/sim/h8300/ChangeLog b/sim/h8300/ChangeLog index 68217e1..b7834f0 100644 --- a/sim/h8300/ChangeLog +++ b/sim/h8300/ChangeLog @@ -1,3 +1,7 @@ +Sun Jul 4 00:35:41 1993 Doug Evans (dje@canuck.cygnus.com) + + * compile.c (sim_csize): Initialize cpu.cache. + Fri Jul 2 17:42:59 1993 Doug Evans (dje@canuck.cygnus.com) * Makefile.in: Add -I../../bfd to pick up bfd.h. diff --git a/sim/h8300/compile.c b/sim/h8300/compile.c new file mode 100644 index 0000000..b349027 --- /dev/null +++ b/sim/h8300/compile.c @@ -0,0 +1,1637 @@ +/* + * 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 "sysdep.h" +#include <sys/times.h> +#include <sys/param.h> + + +int debug; + + +#define X(op, size) op*4+size + +#define SP (Hmode ? 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 Hmode; + + +static int +get_now () +{ + struct tms b; + times (&b); + return b.tms_utime + b.tms_stime; +} + +static int +now_persec () +{ + return 50; +} + + +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 Hmode ? 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) + { + + 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 & 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) + { + + } + 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; + } + 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); + + 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_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) + +int +sim_resume (step) +{ + static int init1; + int cycles = 0; + int insts = 0; + int tick_start = get_now (); + void (*prev) (); + + 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 RD rd = fetch(&code->src); +#define RD_EA rd = fetch(&code->dst); ea = fetch(&code->src); + + ALUOP (1, O_SUB, RD_EA; ea = -ea ; res = rd + ea); + ALUOP (1, O_NEG, RD; 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_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; + + + +#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;} + + + OSHIFTS(O_NOT, rd = ~rd); + OSHIFTS(O_SHLL, c = rd & hm; rd<<=1); + OSHIFTS(O_SHLR, c = rd & 1; 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 >>=1; if (c) rd|= hm;); + OSHIFTS(O_ROTXL,t = rd & hm; rd<<=1; rd|=C; c=t;); + OSHIFTS(O_ROTXR,t = rd & 1; 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 (Hmode) + { + 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 (Hmode) + { + 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_BPT,SB): + cpu.exception = SIGTRAP; + goto end; + +#define OBITOP(name,f, s, op) \ + case O(name, SB): {int m;int b; \ + if (f) ea = fetch(&code->dst);\ + m=1<<code->src.literal;\ + op;\ + if(s) store(&code->dst,ea); goto next;\ + } + OBITOP(O_BNOT,1,1,ea ^= m); + OBITOP(O_BTST,1,0,nz = 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,1,1, b = (ea & m) && C; ea &= ~m; if (b) ea |=m); + OBITOP(O_BIAND,1,1, b = (ea & m) && C; ea &= ~m; if (!b) ea |=m); + OBITOP(O_BOR,1,1, b = (ea & m) || C; ea &= ~m; if (b) ea |=m); + OBITOP(O_BIOR,1,1, b = (ea & m) || C; ea &= ~m; if (!b) ea |=m); + OBITOP(O_BXOR,1,1, b = (ea & m) != C; ea &= ~m; if (b) ea |=m); + OBITOP(O_BIXOR,1,1, b = (ea & m) != C; ea &= ~m; if (!b) ea |=m); + OBITOP(O_BCLR,1,1, ea &= ~m; ); + OBITOP(O_BSET,1,1, ea |= m; ); + + +#define MOP(bsize, signed) \ + { \ + int multiplier; \ + int multiplicand; \ + int result; \ + \ + if (signed) \ + { \ + 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_B_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_B_REG(code->src.reg)); \ + \ + } \ + result = multiplier * multiplicand; \ + \ + if (signed) \ + { \ + 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); \ + } \ + 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; + } + + + + default: + cpu.exception = 123; + goto end; + + } + abort (); + + setc: + 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)); + c = (res < rd) || (res < ea); + goto next; + + next:; + pc = code->next_pc; + + end: + if (cpu.regs[8] ) abort(); + + ; + +} + while (!cpu.exception); + cpu.ticks += get_now () - tick_start; + cpu.cycles += cycles; + cpu.insts += insts; + cpu.pc = pc; + BUILDSR (); + + signal (SIGINT, prev); +} + + + + +void +sim_write (addr, buffer, size) + long int addr; + unsigned char *buffer; + int size; +{ + int i; + + init_pointers (); + if (addr < 0 || addr + size > MSIZE) + return; + for (i = 0; i < size; i++) + { + cpu.memory[addr + i] = buffer[i]; + cpu.cache_idx[addr + i] = 0; + } +} + +void +sim_read (addr, buffer, size) + long int addr; + char *buffer; + int size; +{ + init_pointers (); + if (addr < 0 || addr + size > MSIZE) + return; + memcpy (buffer, cpu.memory + addr, 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; + int value; +{ + + init_pointers (); + switch (rn) + { + case PC_REGNUM: + cpu.pc = value; + 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] = value; + break; + case CCR_REGNUM: + cpu.ccr = value; + break; + case CYCLE_REGNUM: + cpu.cycles = value; + break; + + case INST_REGNUM: + cpu.insts = value; + break; + + case TICK_REGNUM: + cpu.ticks = value; + break; + } +} + +void +sim_fetch_register (rn, buf) + int rn; + 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 (Hmode || 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; + } +} + +int +sim_trace () +{ + return 0; +} + +sim_stop_signal () +{ + return cpu.exception; +} + +sim_set_pc (n) +{ + sim_store_register (PC_REGNUM, n); +} + + +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 ("\n\n#instructions executed %10d\n", cpu.insts); + printf ("#cycles (v approximate) %10d\n", cpu.cycles); + printf ("#real time taken %10.4f\n", timetaken); + printf ("#virtual time taked %10.4f\n", virttime); + if (timetaken != 0.0) + printf ("#simulation ratio %10.4f\n", virttime / timetaken); + printf ("#compiles %10d\n", cpu.compiles); + printf ("#cache size %10d\n", cpu.csize); + + +#ifdef ADEBUG + if (verbose) + { + int i; + for (i= 0; i < O_LAST; i++) + { + if (cpu.stats[i]) + printf("%d: %d\n", i, cpu.stats[i]); + } + } +#endif +} + |