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added pusha/popa/rdtsc/bcd ops

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@27 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-03-16 11:29:31 +00:00
parent 55480af80e
commit 27362c82e9
5 changed files with 314 additions and 9 deletions
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3
TODO
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@ -1,4 +1,7 @@
- daa/das
- optimize translated cache chaining (DLL PLT like system)
- segment ops (minimal LDT/GDT support for wine)
- improved 16 bit support
- optimize inverse flags propagation (easy by generating intermediate
micro operation array).
- signals

2
cpu-i386.h
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@ -114,7 +114,7 @@ enum {
};
#ifdef __i386__
//#define USE_X86LDOUBLE
#define USE_X86LDOUBLE
#endif
#ifdef USE_X86LDOUBLE

2
linux-user/main.c
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@ -87,7 +87,7 @@ int cpu_x86_inl(int addr)
void usage(void)
{
printf("gemu version" GEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
printf("gemu version " GEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
"usage: gemu [-d] program [arguments...]\n"
"Linux x86 emulator\n"
);

237
op-i386.c
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@ -628,6 +628,236 @@ void op_addl_ESP_im(void)
ESP += PARAM1;
}
void op_pushal(void)
{
uint8_t *sp;
sp = (void *)(ESP - 32);
stl(sp, EDI);
stl(sp + 4, ESI);
stl(sp + 8, EBP);
stl(sp + 12, ESP);
stl(sp + 16, EBX);
stl(sp + 20, EDX);
stl(sp + 24, ECX);
stl(sp + 28, EAX);
ESP = (unsigned long)sp;
}
void op_pushaw(void)
{
uint8_t *sp;
sp = (void *)(ESP - 16);
stw(sp, EDI);
stw(sp + 2, ESI);
stw(sp + 4, EBP);
stw(sp + 6, ESP);
stw(sp + 8, EBX);
stw(sp + 10, EDX);
stw(sp + 12, ECX);
stw(sp + 14, EAX);
ESP = (unsigned long)sp;
}
void op_popal(void)
{
uint8_t *sp;
sp = (void *)ESP;
EDI = ldl(sp);
ESI = ldl(sp + 4);
EBP = ldl(sp + 8);
EBX = ldl(sp + 16);
EDX = ldl(sp + 20);
ECX = ldl(sp + 24);
EAX = ldl(sp + 28);
ESP = (unsigned long)sp + 32;
}
void op_popaw(void)
{
uint8_t *sp;
sp = (void *)ESP;
EDI = ldl(sp);
ESI = ldl(sp + 2);
EBP = ldl(sp + 4);
EBX = ldl(sp + 8);
EDX = ldl(sp + 10);
ECX = ldl(sp + 12);
EAX = ldl(sp + 14);
ESP = (unsigned long)sp + 16;
}
void op_enterl(void)
{
unsigned int bp, frame_temp, level;
uint8_t *sp;
sp = (void *)ESP;
bp = EBP;
sp -= 4;
stl(sp, bp);
frame_temp = (unsigned int)sp;
level = PARAM2;
if (level) {
while (level--) {
bp -= 4;
sp -= 4;
stl(sp, bp);
}
sp -= 4;
stl(sp, frame_temp);
}
EBP = frame_temp;
sp -= PARAM1;
ESP = (int)sp;
}
/* rdtsc */
#ifndef __i386__
uint64_t emu_time;
#endif
void op_rdtsc(void)
{
uint64_t val;
#ifdef __i386__
asm("rdtsc" : "=A" (val));
#else
/* better than nothing: the time increases */
val = emu_time++;
#endif
EAX = val;
EDX = val >> 32;
}
/* bcd */
/* XXX: exception */
void OPPROTO op_aam(void)
{
int base = PARAM1;
int al, ah;
al = EAX & 0xff;
ah = al / base;
al = al % base;
EAX = (EAX & ~0xffff) | al | (ah << 8);
CC_DST = al;
}
void OPPROTO op_aad(void)
{
int base = PARAM1;
int al, ah;
al = EAX & 0xff;
ah = (EAX >> 8) & 0xff;
al = ((ah * base) + al) & 0xff;
EAX = (EAX & ~0xffff) | al;
CC_DST = al;
}
void OPPROTO op_aaa(void)
{
int icarry;
int al, ah, af;
int eflags;
eflags = cc_table[CC_OP].compute_all();
af = eflags & CC_A;
al = EAX & 0xff;
ah = (EAX >> 8) & 0xff;
icarry = (al > 0xf9);
if (((al & 0x0f) > 9 ) || af) {
al = (al + 6) & 0x0f;
ah = (ah + 1 + icarry) & 0xff;
eflags |= CC_C | CC_A;
} else {
eflags &= ~(CC_C | CC_A);
al &= 0x0f;
}
EAX = (EAX & ~0xffff) | al | (ah << 8);
CC_SRC = eflags;
}
void OPPROTO op_aas(void)
{
int icarry;
int al, ah, af;
int eflags;
eflags = cc_table[CC_OP].compute_all();
af = eflags & CC_A;
al = EAX & 0xff;
ah = (EAX >> 8) & 0xff;
icarry = (al < 6);
if (((al & 0x0f) > 9 ) || af) {
al = (al - 6) & 0x0f;
ah = (ah - 1 - icarry) & 0xff;
eflags |= CC_C | CC_A;
} else {
eflags &= ~(CC_C | CC_A);
al &= 0x0f;
}
EAX = (EAX & ~0xffff) | al | (ah << 8);
CC_SRC = eflags;
}
void OPPROTO op_daa(void)
{
int al, af, cf;
int eflags;
eflags = cc_table[CC_OP].compute_all();
cf = eflags & CC_C;
af = eflags & CC_A;
al = EAX & 0xff;
eflags = 0;
if (((al & 0x0f) > 9 ) || af) {
al = (al + 6) & 0xff;
eflags |= CC_A;
}
if ((al > 0x9f) || cf) {
al = (al + 0x60) & 0xff;
eflags |= CC_C;
}
EAX = (EAX & ~0xff) | al;
/* well, speed is not an issue here, so we compute the flags by hand */
eflags |= (al == 0) << 6; /* zf */
eflags |= parity_table[al]; /* pf */
eflags |= (al & 0x80); /* sf */
CC_SRC = eflags;
}
void OPPROTO op_das(void)
{
int al, al1, af, cf;
int eflags;
eflags = cc_table[CC_OP].compute_all();
cf = eflags & CC_C;
af = eflags & CC_A;
al = EAX & 0xff;
eflags = 0;
al1 = al;
if (((al & 0x0f) > 9 ) || af) {
eflags |= CC_A;
if (al < 6 || cf)
eflags |= CC_C;
al = (al - 6) & 0xff;
}
if ((al1 > 0x99) || cf) {
al = (al - 0x60) & 0xff;
eflags |= CC_C;
}
EAX = (EAX & ~0xff) | al;
/* well, speed is not an issue here, so we compute the flags by hand */
eflags |= (al == 0) << 6; /* zf */
eflags |= parity_table[al]; /* pf */
eflags |= (al & 0x80); /* sf */
CC_SRC = eflags;
}
/* flags handling */
/* slow jumps cases (compute x86 flags) */
@ -836,6 +1066,13 @@ void OPPROTO op_cmc(void)
CC_SRC = eflags;
}
void OPPROTO op_salc(void)
{
int cf;
cf = cc_table[CC_OP].compute_c();
EAX = (EAX & ~0xff) | ((-cf) & 0xff);
}
static int compute_all_eflags(void)
{
return CC_SRC;

79
translate-i386.c
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@ -1511,6 +1511,18 @@ long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
gen_op_popl_T0();
gen_op_mov_reg_T0[OT_LONG][b & 7]();
break;
case 0x60: /* pusha */
if (s->dflag)
gen_op_pushal();
else
gen_op_pushaw();
break;
case 0x61: /* popa */
if (s->dflag)
gen_op_popal();
else
gen_op_popaw();
break;
case 0x68: /* push Iv */
case 0x6a:
ot = dflag ? OT_LONG : OT_WORD;
@ -1527,6 +1539,16 @@ long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
gen_op_popl_T0();
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
break;
case 0xc8: /* enter */
{
int level;
val = lduw(s->pc);
s->pc += 2;
level = ldub(s->pc++);
level &= 0x1f;
gen_op_enterl(val, level);
}
break;
case 0xc9: /* leave */
gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
gen_op_mov_reg_T0[OT_LONG][R_ESP]();
@ -2485,6 +2507,42 @@ long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
s->cc_op = CC_OP_LOGICB + ot;
break;
/************************/
/* bcd */
case 0x27: /* daa */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_daa();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x2f: /* das */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_das();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x37: /* aaa */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_aaa();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x3f: /* aas */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_aas();
s->cc_op = CC_OP_EFLAGS;
break;
case 0xd4: /* aam */
val = ldub(s->pc++);
gen_op_aam(val);
s->cc_op = CC_OP_LOGICB;
break;
case 0xd5: /* aad */
val = ldub(s->pc++);
gen_op_aad(val);
s->cc_op = CC_OP_LOGICB;
break;
/************************/
/* misc */
case 0x90: /* nop */
break;
@ -2505,19 +2563,26 @@ long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
*is_jmp_ptr = 1;
break;
case 0x1c8 ... 0x1cf: /* bswap reg */
reg = b & 7;
gen_op_mov_TN_reg[OT_LONG][0][reg]();
gen_op_bswapl_T0();
gen_op_mov_reg_T0[OT_LONG][reg]();
break;
reg = b & 7;
gen_op_mov_TN_reg[OT_LONG][0][reg]();
gen_op_bswapl_T0();
gen_op_mov_reg_T0[OT_LONG][reg]();
break;
case 0xd6: /* salc */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_salc();
break;
case 0x1a2: /* rdtsc */
gen_op_rdtsc();
break;
#if 0
case 0x1a2: /* cpuid */
gen_insn0(OP_ASM);
break;
#endif
default:
error("unknown opcode %x", b);
error("unknown opcode 0x%x", b);
return -1;
}
return (long)s->pc;