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qemu/op-i386.c
bellard 1e5ffbedde fixed float to int overflow bug - added ARM host correct roundings for float rounding 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@237 c046a42c-6fe2-441c-8c8c-71466251a162
2003-06-15 19:49:16 +00:00

1921 lines
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/*
* i386 micro operations
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "exec-i386.h"
/* n must be a constant to be efficient */
static inline int lshift(int x, int n)
{
if (n >= 0)
return x << n;
else
return x >> (-n);
}
/* we define the various pieces of code used by the JIT */
#define REG EAX
#define REGNAME _EAX
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG ECX
#define REGNAME _ECX
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG EDX
#define REGNAME _EDX
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG EBX
#define REGNAME _EBX
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG ESP
#define REGNAME _ESP
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG EBP
#define REGNAME _EBP
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG ESI
#define REGNAME _ESI
#include "opreg_template.h"
#undef REG
#undef REGNAME
#define REG EDI
#define REGNAME _EDI
#include "opreg_template.h"
#undef REG
#undef REGNAME
/* operations with flags */
void OPPROTO op_addl_T0_T1_cc(void)
{
CC_SRC = T0;
T0 += T1;
CC_DST = T0;
}
void OPPROTO op_orl_T0_T1_cc(void)
{
T0 |= T1;
CC_DST = T0;
}
void OPPROTO op_andl_T0_T1_cc(void)
{
T0 &= T1;
CC_DST = T0;
}
void OPPROTO op_subl_T0_T1_cc(void)
{
CC_SRC = T0;
T0 -= T1;
CC_DST = T0;
}
void OPPROTO op_xorl_T0_T1_cc(void)
{
T0 ^= T1;
CC_DST = T0;
}
void OPPROTO op_cmpl_T0_T1_cc(void)
{
CC_SRC = T0;
CC_DST = T0 - T1;
}
void OPPROTO op_negl_T0_cc(void)
{
CC_SRC = 0;
T0 = -T0;
CC_DST = T0;
}
void OPPROTO op_incl_T0_cc(void)
{
CC_SRC = cc_table[CC_OP].compute_c();
T0++;
CC_DST = T0;
}
void OPPROTO op_decl_T0_cc(void)
{
CC_SRC = cc_table[CC_OP].compute_c();
T0--;
CC_DST = T0;
}
void OPPROTO op_testl_T0_T1_cc(void)
{
CC_DST = T0 & T1;
}
/* operations without flags */
void OPPROTO op_addl_T0_T1(void)
{
T0 += T1;
}
void OPPROTO op_orl_T0_T1(void)
{
T0 |= T1;
}
void OPPROTO op_andl_T0_T1(void)
{
T0 &= T1;
}
void OPPROTO op_subl_T0_T1(void)
{
T0 -= T1;
}
void OPPROTO op_xorl_T0_T1(void)
{
T0 ^= T1;
}
void OPPROTO op_negl_T0(void)
{
T0 = -T0;
}
void OPPROTO op_incl_T0(void)
{
T0++;
}
void OPPROTO op_decl_T0(void)
{
T0--;
}
void OPPROTO op_notl_T0(void)
{
T0 = ~T0;
}
void OPPROTO op_bswapl_T0(void)
{
T0 = bswap32(T0);
}
/* multiply/divide */
void OPPROTO op_mulb_AL_T0(void)
{
unsigned int res;
res = (uint8_t)EAX * (uint8_t)T0;
EAX = (EAX & 0xffff0000) | res;
CC_SRC = (res & 0xff00);
}
void OPPROTO op_imulb_AL_T0(void)
{
int res;
res = (int8_t)EAX * (int8_t)T0;
EAX = (EAX & 0xffff0000) | (res & 0xffff);
CC_SRC = (res != (int8_t)res);
}
void OPPROTO op_mulw_AX_T0(void)
{
unsigned int res;
res = (uint16_t)EAX * (uint16_t)T0;
EAX = (EAX & 0xffff0000) | (res & 0xffff);
EDX = (EDX & 0xffff0000) | ((res >> 16) & 0xffff);
CC_SRC = res >> 16;
}
void OPPROTO op_imulw_AX_T0(void)
{
int res;
res = (int16_t)EAX * (int16_t)T0;
EAX = (EAX & 0xffff0000) | (res & 0xffff);
EDX = (EDX & 0xffff0000) | ((res >> 16) & 0xffff);
CC_SRC = (res != (int16_t)res);
}
void OPPROTO op_mull_EAX_T0(void)
{
uint64_t res;
res = (uint64_t)((uint32_t)EAX) * (uint64_t)((uint32_t)T0);
EAX = res;
EDX = res >> 32;
CC_SRC = res >> 32;
}
void OPPROTO op_imull_EAX_T0(void)
{
int64_t res;
res = (int64_t)((int32_t)EAX) * (int64_t)((int32_t)T0);
EAX = res;
EDX = res >> 32;
CC_SRC = (res != (int32_t)res);
}
void OPPROTO op_imulw_T0_T1(void)
{
int res;
res = (int16_t)T0 * (int16_t)T1;
T0 = res;
CC_SRC = (res != (int16_t)res);
}
void OPPROTO op_imull_T0_T1(void)
{
int64_t res;
res = (int64_t)((int32_t)T0) * (int64_t)((int32_t)T1);
T0 = res;
CC_SRC = (res != (int32_t)res);
}
/* division, flags are undefined */
/* XXX: add exceptions for overflow */
void OPPROTO op_divb_AL_T0(void)
{
unsigned int num, den, q, r;
num = (EAX & 0xffff);
den = (T0 & 0xff);
if (den == 0) {
EIP = PARAM1;
raise_exception(EXCP00_DIVZ);
}
q = (num / den) & 0xff;
r = (num % den) & 0xff;
EAX = (EAX & 0xffff0000) | (r << 8) | q;
}
void OPPROTO op_idivb_AL_T0(void)
{
int num, den, q, r;
num = (int16_t)EAX;
den = (int8_t)T0;
if (den == 0) {
EIP = PARAM1;
raise_exception(EXCP00_DIVZ);
}
q = (num / den) & 0xff;
r = (num % den) & 0xff;
EAX = (EAX & 0xffff0000) | (r << 8) | q;
}
void OPPROTO op_divw_AX_T0(void)
{
unsigned int num, den, q, r;
num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
den = (T0 & 0xffff);
if (den == 0) {
EIP = PARAM1;
raise_exception(EXCP00_DIVZ);
}
q = (num / den) & 0xffff;
r = (num % den) & 0xffff;
EAX = (EAX & 0xffff0000) | q;
EDX = (EDX & 0xffff0000) | r;
}
void OPPROTO op_idivw_AX_T0(void)
{
int num, den, q, r;
num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
den = (int16_t)T0;
if (den == 0) {
EIP = PARAM1;
raise_exception(EXCP00_DIVZ);
}
q = (num / den) & 0xffff;
r = (num % den) & 0xffff;
EAX = (EAX & 0xffff0000) | q;
EDX = (EDX & 0xffff0000) | r;
}
void OPPROTO op_divl_EAX_T0(void)
{
helper_divl_EAX_T0(PARAM1);
}
void OPPROTO op_idivl_EAX_T0(void)
{
helper_idivl_EAX_T0(PARAM1);
}
/* constant load & misc op */
void OPPROTO op_movl_T0_im(void)
{
T0 = PARAM1;
}
void OPPROTO op_addl_T0_im(void)
{
T0 += PARAM1;
}
void OPPROTO op_andl_T0_ffff(void)
{
T0 = T0 & 0xffff;
}
void OPPROTO op_movl_T0_T1(void)
{
T0 = T1;
}
void OPPROTO op_movl_T1_im(void)
{
T1 = PARAM1;
}
void OPPROTO op_addl_T1_im(void)
{
T1 += PARAM1;
}
void OPPROTO op_movl_T1_A0(void)
{
T1 = A0;
}
void OPPROTO op_movl_A0_im(void)
{
A0 = PARAM1;
}
void OPPROTO op_addl_A0_im(void)
{
A0 += PARAM1;
}
void OPPROTO op_addl_A0_AL(void)
{
A0 += (EAX & 0xff);
}
void OPPROTO op_andl_A0_ffff(void)
{
A0 = A0 & 0xffff;
}
/* memory access */
void OPPROTO op_ldub_T0_A0(void)
{
T0 = ldub((uint8_t *)A0);
}
void OPPROTO op_ldsb_T0_A0(void)
{
T0 = ldsb((int8_t *)A0);
}
void OPPROTO op_lduw_T0_A0(void)
{
T0 = lduw((uint8_t *)A0);
}
void OPPROTO op_ldsw_T0_A0(void)
{
T0 = ldsw((int8_t *)A0);
}
void OPPROTO op_ldl_T0_A0(void)
{
T0 = ldl((uint8_t *)A0);
}
void OPPROTO op_ldub_T1_A0(void)
{
T1 = ldub((uint8_t *)A0);
}
void OPPROTO op_ldsb_T1_A0(void)
{
T1 = ldsb((int8_t *)A0);
}
void OPPROTO op_lduw_T1_A0(void)
{
T1 = lduw((uint8_t *)A0);
}
void OPPROTO op_ldsw_T1_A0(void)
{
T1 = ldsw((int8_t *)A0);
}
void OPPROTO op_ldl_T1_A0(void)
{
T1 = ldl((uint8_t *)A0);
}
void OPPROTO op_stb_T0_A0(void)
{
stb((uint8_t *)A0, T0);
}
void OPPROTO op_stw_T0_A0(void)
{
stw((uint8_t *)A0, T0);
}
void OPPROTO op_stl_T0_A0(void)
{
stl((uint8_t *)A0, T0);
}
/* used for bit operations */
void OPPROTO op_add_bitw_A0_T1(void)
{
A0 += ((int32_t)T1 >> 4) << 1;
}
void OPPROTO op_add_bitl_A0_T1(void)
{
A0 += ((int32_t)T1 >> 5) << 2;
}
/* indirect jump */
void OPPROTO op_jmp_T0(void)
{
EIP = T0;
}
void OPPROTO op_jmp_im(void)
{
EIP = PARAM1;
}
void OPPROTO op_raise_interrupt(void)
{
int intno;
unsigned int next_eip;
intno = PARAM1;
next_eip = PARAM2;
raise_interrupt(intno, 1, 0, next_eip);
}
void OPPROTO op_raise_exception(void)
{
int exception_index;
exception_index = PARAM1;
raise_exception(exception_index);
}
void OPPROTO op_into(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
if (eflags & CC_O) {
raise_interrupt(EXCP04_INTO, 1, 0, PARAM1);
}
FORCE_RET();
}
void OPPROTO op_cli(void)
{
env->eflags &= ~IF_MASK;
}
void OPPROTO op_sti(void)
{
env->eflags |= IF_MASK;
}
#if 0
/* vm86plus instructions */
void OPPROTO op_cli_vm(void)
{
env->eflags &= ~VIF_MASK;
}
void OPPROTO op_sti_vm(void)
{
env->eflags |= VIF_MASK;
if (env->eflags & VIP_MASK) {
EIP = PARAM1;
raise_exception(EXCP0D_GPF);
}
FORCE_RET();
}
#endif
void OPPROTO op_boundw(void)
{
int low, high, v;
low = ldsw((uint8_t *)A0);
high = ldsw((uint8_t *)A0 + 2);
v = (int16_t)T0;
if (v < low || v > high) {
EIP = PARAM1;
raise_exception(EXCP05_BOUND);
}
FORCE_RET();
}
void OPPROTO op_boundl(void)
{
int low, high, v;
low = ldl((uint8_t *)A0);
high = ldl((uint8_t *)A0 + 4);
v = T0;
if (v < low || v > high) {
EIP = PARAM1;
raise_exception(EXCP05_BOUND);
}
FORCE_RET();
}
void OPPROTO op_cmpxchg8b(void)
{
helper_cmpxchg8b();
}
void OPPROTO op_jmp_tb_next(void)
{
JUMP_TB(PARAM1, 0, PARAM2);
}
void OPPROTO op_movl_T0_0(void)
{
T0 = 0;
}
/* multiple size ops */
#define ldul ldl
#define SHIFT 0
#include "ops_template.h"
#undef SHIFT
#define SHIFT 1
#include "ops_template.h"
#undef SHIFT
#define SHIFT 2
#include "ops_template.h"
#undef SHIFT
/* sign extend */
void OPPROTO op_movsbl_T0_T0(void)
{
T0 = (int8_t)T0;
}
void OPPROTO op_movzbl_T0_T0(void)
{
T0 = (uint8_t)T0;
}
void OPPROTO op_movswl_T0_T0(void)
{
T0 = (int16_t)T0;
}
void OPPROTO op_movzwl_T0_T0(void)
{
T0 = (uint16_t)T0;
}
void OPPROTO op_movswl_EAX_AX(void)
{
EAX = (int16_t)EAX;
}
void OPPROTO op_movsbw_AX_AL(void)
{
EAX = (EAX & 0xffff0000) | ((int8_t)EAX & 0xffff);
}
void OPPROTO op_movslq_EDX_EAX(void)
{
EDX = (int32_t)EAX >> 31;
}
void OPPROTO op_movswl_DX_AX(void)
{
EDX = (EDX & 0xffff0000) | (((int16_t)EAX >> 15) & 0xffff);
}
/* push/pop */
void op_pushl_T0(void)
{
uint32_t offset;
offset = ESP - 4;
stl((void *)offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = offset;
}
void op_pushw_T0(void)
{
uint32_t offset;
offset = ESP - 2;
stw((void *)offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = offset;
}
void op_pushl_ss32_T0(void)
{
uint32_t offset;
offset = ESP - 4;
stl(env->seg_cache[R_SS].base + offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = offset;
}
void op_pushw_ss32_T0(void)
{
uint32_t offset;
offset = ESP - 2;
stw(env->seg_cache[R_SS].base + offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = offset;
}
void op_pushl_ss16_T0(void)
{
uint32_t offset;
offset = (ESP - 4) & 0xffff;
stl(env->seg_cache[R_SS].base + offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = (ESP & ~0xffff) | offset;
}
void op_pushw_ss16_T0(void)
{
uint32_t offset;
offset = (ESP - 2) & 0xffff;
stw(env->seg_cache[R_SS].base + offset, T0);
/* modify ESP after to handle exceptions correctly */
ESP = (ESP & ~0xffff) | offset;
}
/* NOTE: ESP update is done after */
void op_popl_T0(void)
{
T0 = ldl((void *)ESP);
}
void op_popw_T0(void)
{
T0 = lduw((void *)ESP);
}
void op_popl_ss32_T0(void)
{
T0 = ldl(env->seg_cache[R_SS].base + ESP);
}
void op_popw_ss32_T0(void)
{
T0 = lduw(env->seg_cache[R_SS].base + ESP);
}
void op_popl_ss16_T0(void)
{
T0 = ldl(env->seg_cache[R_SS].base + (ESP & 0xffff));
}
void op_popw_ss16_T0(void)
{
T0 = lduw(env->seg_cache[R_SS].base + (ESP & 0xffff));
}
void op_addl_ESP_4(void)
{
ESP += 4;
}
void op_addl_ESP_2(void)
{
ESP += 2;
}
void op_addw_ESP_4(void)
{
ESP = (ESP & ~0xffff) | ((ESP + 4) & 0xffff);
}
void op_addw_ESP_2(void)
{
ESP = (ESP & ~0xffff) | ((ESP + 2) & 0xffff);
}
void op_addl_ESP_im(void)
{
ESP += PARAM1;
}
void op_addw_ESP_im(void)
{
ESP = (ESP & ~0xffff) | ((ESP + PARAM1) & 0xffff);
}
void OPPROTO op_rdtsc(void)
{
helper_rdtsc();
}
void OPPROTO op_cpuid(void)
{
helper_cpuid();
}
/* 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;
}
/* segment handling */
void OPPROTO op_movl_seg_T0(void)
{
load_seg(PARAM1, T0 & 0xffff, PARAM2);
}
/* faster VM86 version */
void OPPROTO op_movl_seg_T0_vm(void)
{
int selector;
selector = T0 & 0xffff;
/* env->segs[] access */
*(uint32_t *)((char *)env + PARAM1) = selector;
/* env->seg_cache[] access */
((SegmentCache *)((char *)env + PARAM2))->base = (void *)(selector << 4);
}
void OPPROTO op_movl_T0_seg(void)
{
T0 = env->segs[PARAM1];
}
void OPPROTO op_movl_A0_seg(void)
{
A0 = *(unsigned long *)((char *)env + PARAM1);
}
void OPPROTO op_addl_A0_seg(void)
{
A0 += *(unsigned long *)((char *)env + PARAM1);
}
void OPPROTO op_lsl(void)
{
helper_lsl();
}
void OPPROTO op_lar(void)
{
helper_lar();
}
/* flags handling */
/* slow jumps cases : in order to avoid calling a function with a
pointer (which can generate a stack frame on PowerPC), we use
op_setcc to set T0 and then call op_jcc. */
void OPPROTO op_jcc(void)
{
if (T0)
JUMP_TB(PARAM1, 0, PARAM2);
else
JUMP_TB(PARAM1, 1, PARAM3);
FORCE_RET();
}
/* slow set cases (compute x86 flags) */
void OPPROTO op_seto_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (eflags >> 11) & 1;
}
void OPPROTO op_setb_T0_cc(void)
{
T0 = cc_table[CC_OP].compute_c();
}
void OPPROTO op_setz_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (eflags >> 6) & 1;
}
void OPPROTO op_setbe_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (eflags & (CC_Z | CC_C)) != 0;
}
void OPPROTO op_sets_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (eflags >> 7) & 1;
}
void OPPROTO op_setp_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (eflags >> 2) & 1;
}
void OPPROTO op_setl_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = ((eflags ^ (eflags >> 4)) >> 7) & 1;
}
void OPPROTO op_setle_T0_cc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
T0 = (((eflags ^ (eflags >> 4)) & 0x80) || (eflags & CC_Z)) != 0;
}
void OPPROTO op_xor_T0_1(void)
{
T0 ^= 1;
}
void OPPROTO op_set_cc_op(void)
{
CC_OP = PARAM1;
}
#define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)
#define FL_UPDATE_MASK16 (TF_MASK)
void OPPROTO op_movl_eflags_T0(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~FL_UPDATE_MASK32) | (eflags & FL_UPDATE_MASK32);
}
void OPPROTO op_movw_eflags_T0(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~FL_UPDATE_MASK16) | (eflags & FL_UPDATE_MASK16);
}
#if 0
/* vm86plus version */
void OPPROTO op_movw_eflags_T0_vm(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~(FL_UPDATE_MASK16 | VIF_MASK)) |
(eflags & FL_UPDATE_MASK16);
if (eflags & IF_MASK) {
env->eflags |= VIF_MASK;
if (env->eflags & VIP_MASK) {
EIP = PARAM1;
raise_exception(EXCP0D_GPF);
}
}
FORCE_RET();
}
void OPPROTO op_movl_eflags_T0_vm(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~(FL_UPDATE_MASK32 | VIF_MASK)) |
(eflags & FL_UPDATE_MASK32);
if (eflags & IF_MASK) {
env->eflags |= VIF_MASK;
if (env->eflags & VIP_MASK) {
EIP = PARAM1;
raise_exception(EXCP0D_GPF);
}
}
FORCE_RET();
}
#endif
/* XXX: compute only O flag */
void OPPROTO op_movb_eflags_T0(void)
{
int of;
of = cc_table[CC_OP].compute_all() & CC_O;
CC_SRC = (T0 & (CC_S | CC_Z | CC_A | CC_P | CC_C)) | of;
}
void OPPROTO op_movl_T0_eflags(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags |= (DF & DF_MASK);
eflags |= env->eflags & ~(VM_MASK | RF_MASK);
T0 = eflags;
}
/* vm86plus version */
#if 0
void OPPROTO op_movl_T0_eflags_vm(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags |= (DF & DF_MASK);
eflags |= env->eflags & ~(VM_MASK | RF_MASK | IF_MASK);
if (env->eflags & VIF_MASK)
eflags |= IF_MASK;
T0 = eflags;
}
#endif
void OPPROTO op_cld(void)
{
DF = 1;
}
void OPPROTO op_std(void)
{
DF = -1;
}
void OPPROTO op_clc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags &= ~CC_C;
CC_SRC = eflags;
}
void OPPROTO op_stc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags |= CC_C;
CC_SRC = eflags;
}
void OPPROTO op_cmc(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags ^= CC_C;
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;
}
static int compute_c_eflags(void)
{
return CC_SRC & CC_C;
}
static int compute_c_mul(void)
{
int cf;
cf = (CC_SRC != 0);
return cf;
}
static int compute_all_mul(void)
{
int cf, pf, af, zf, sf, of;
cf = (CC_SRC != 0);
pf = 0; /* undefined */
af = 0; /* undefined */
zf = 0; /* undefined */
sf = 0; /* undefined */
of = cf << 11;
return cf | pf | af | zf | sf | of;
}
CCTable cc_table[CC_OP_NB] = {
[CC_OP_DYNAMIC] = { /* should never happen */ },
[CC_OP_EFLAGS] = { compute_all_eflags, compute_c_eflags },
[CC_OP_MUL] = { compute_all_mul, compute_c_mul },
[CC_OP_ADDB] = { compute_all_addb, compute_c_addb },
[CC_OP_ADDW] = { compute_all_addw, compute_c_addw },
[CC_OP_ADDL] = { compute_all_addl, compute_c_addl },
[CC_OP_ADCB] = { compute_all_adcb, compute_c_adcb },
[CC_OP_ADCW] = { compute_all_adcw, compute_c_adcw },
[CC_OP_ADCL] = { compute_all_adcl, compute_c_adcl },
[CC_OP_SUBB] = { compute_all_subb, compute_c_subb },
[CC_OP_SUBW] = { compute_all_subw, compute_c_subw },
[CC_OP_SUBL] = { compute_all_subl, compute_c_subl },
[CC_OP_SBBB] = { compute_all_sbbb, compute_c_sbbb },
[CC_OP_SBBW] = { compute_all_sbbw, compute_c_sbbw },
[CC_OP_SBBL] = { compute_all_sbbl, compute_c_sbbl },
[CC_OP_LOGICB] = { compute_all_logicb, compute_c_logicb },
[CC_OP_LOGICW] = { compute_all_logicw, compute_c_logicw },
[CC_OP_LOGICL] = { compute_all_logicl, compute_c_logicl },
[CC_OP_INCB] = { compute_all_incb, compute_c_incl },
[CC_OP_INCW] = { compute_all_incw, compute_c_incl },
[CC_OP_INCL] = { compute_all_incl, compute_c_incl },
[CC_OP_DECB] = { compute_all_decb, compute_c_incl },
[CC_OP_DECW] = { compute_all_decw, compute_c_incl },
[CC_OP_DECL] = { compute_all_decl, compute_c_incl },
[CC_OP_SHLB] = { compute_all_shlb, compute_c_shlb },
[CC_OP_SHLW] = { compute_all_shlw, compute_c_shlw },
[CC_OP_SHLL] = { compute_all_shll, compute_c_shll },
[CC_OP_SARB] = { compute_all_sarb, compute_c_sarl },
[CC_OP_SARW] = { compute_all_sarw, compute_c_sarl },
[CC_OP_SARL] = { compute_all_sarl, compute_c_sarl },
};
/* floating point support. Some of the code for complicated x87
functions comes from the LGPL'ed x86 emulator found in the Willows
TWIN windows emulator. */
#if defined(__powerpc__)
extern CPU86_LDouble copysign(CPU86_LDouble, CPU86_LDouble);
/* correct (but slow) PowerPC rint() (glibc version is incorrect) */
double qemu_rint(double x)
{
double y = 4503599627370496.0;
if (fabs(x) >= y)
return x;
if (x < 0)
y = -y;
y = (x + y) - y;
if (y == 0.0)
y = copysign(y, x);
return y;
}
#define rint qemu_rint
#endif
/* fp load FT0 */
void OPPROTO op_flds_FT0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = ldl((void *)A0);
FT0 = FP_CONVERT.f;
#else
FT0 = ldfl((void *)A0);
#endif
}
void OPPROTO op_fldl_FT0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i64 = ldq((void *)A0);
FT0 = FP_CONVERT.d;
#else
FT0 = ldfq((void *)A0);
#endif
}
/* helpers are needed to avoid static constant reference. XXX: find a better way */
#ifdef USE_INT_TO_FLOAT_HELPERS
void helper_fild_FT0_A0(void)
{
FT0 = (CPU86_LDouble)ldsw((void *)A0);
}
void helper_fildl_FT0_A0(void)
{
FT0 = (CPU86_LDouble)((int32_t)ldl((void *)A0));
}
void helper_fildll_FT0_A0(void)
{
FT0 = (CPU86_LDouble)((int64_t)ldq((void *)A0));
}
void OPPROTO op_fild_FT0_A0(void)
{
helper_fild_FT0_A0();
}
void OPPROTO op_fildl_FT0_A0(void)
{
helper_fildl_FT0_A0();
}
void OPPROTO op_fildll_FT0_A0(void)
{
helper_fildll_FT0_A0();
}
#else
void OPPROTO op_fild_FT0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = ldsw((void *)A0);
FT0 = (CPU86_LDouble)FP_CONVERT.i32;
#else
FT0 = (CPU86_LDouble)ldsw((void *)A0);
#endif
}
void OPPROTO op_fildl_FT0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = (int32_t) ldl((void *)A0);
FT0 = (CPU86_LDouble)FP_CONVERT.i32;
#else
FT0 = (CPU86_LDouble)((int32_t)ldl((void *)A0));
#endif
}
void OPPROTO op_fildll_FT0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i64 = (int64_t) ldq((void *)A0);
FT0 = (CPU86_LDouble)FP_CONVERT.i64;
#else
FT0 = (CPU86_LDouble)((int64_t)ldq((void *)A0));
#endif
}
#endif
/* fp load ST0 */
void OPPROTO op_flds_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = ldl((void *)A0);
ST0 = FP_CONVERT.f;
#else
ST0 = ldfl((void *)A0);
#endif
}
void OPPROTO op_fldl_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i64 = ldq((void *)A0);
ST0 = FP_CONVERT.d;
#else
ST0 = ldfq((void *)A0);
#endif
}
#ifdef USE_X86LDOUBLE
void OPPROTO op_fldt_ST0_A0(void)
{
ST0 = *(long double *)A0;
}
#else
void OPPROTO op_fldt_ST0_A0(void)
{
helper_fldt_ST0_A0();
}
#endif
/* helpers are needed to avoid static constant reference. XXX: find a better way */
#ifdef USE_INT_TO_FLOAT_HELPERS
void helper_fild_ST0_A0(void)
{
ST0 = (CPU86_LDouble)ldsw((void *)A0);
}
void helper_fildl_ST0_A0(void)
{
ST0 = (CPU86_LDouble)((int32_t)ldl((void *)A0));
}
void helper_fildll_ST0_A0(void)
{
ST0 = (CPU86_LDouble)((int64_t)ldq((void *)A0));
}
void OPPROTO op_fild_ST0_A0(void)
{
helper_fild_ST0_A0();
}
void OPPROTO op_fildl_ST0_A0(void)
{
helper_fildl_ST0_A0();
}
void OPPROTO op_fildll_ST0_A0(void)
{
helper_fildll_ST0_A0();
}
#else
void OPPROTO op_fild_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = ldsw((void *)A0);
ST0 = (CPU86_LDouble)FP_CONVERT.i32;
#else
ST0 = (CPU86_LDouble)ldsw((void *)A0);
#endif
}
void OPPROTO op_fildl_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i32 = (int32_t) ldl((void *)A0);
ST0 = (CPU86_LDouble)FP_CONVERT.i32;
#else
ST0 = (CPU86_LDouble)((int32_t)ldl((void *)A0));
#endif
}
void OPPROTO op_fildll_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.i64 = (int64_t) ldq((void *)A0);
ST0 = (CPU86_LDouble)FP_CONVERT.i64;
#else
ST0 = (CPU86_LDouble)((int64_t)ldq((void *)A0));
#endif
}
#endif
/* fp store */
void OPPROTO op_fsts_ST0_A0(void)
{
#ifdef USE_FP_CONVERT
FP_CONVERT.f = (float)ST0;
stfl((void *)A0, FP_CONVERT.f);
#else
stfl((void *)A0, (float)ST0);
#endif
}
void OPPROTO op_fstl_ST0_A0(void)
{
stfq((void *)A0, (double)ST0);
}
#ifdef USE_X86LDOUBLE
void OPPROTO op_fstt_ST0_A0(void)
{
*(long double *)A0 = ST0;
}
#else
void OPPROTO op_fstt_ST0_A0(void)
{
helper_fstt_ST0_A0();
}
#endif
void OPPROTO op_fist_ST0_A0(void)
{
#if defined(__sparc__) && !defined(__sparc_v9__)
register CPU86_LDouble d asm("o0");
#else
CPU86_LDouble d;
#endif
int val;
d = ST0;
val = lrint(d);
if (val != (int16_t)val)
val = -32768;
stw((void *)A0, val);
}
void OPPROTO op_fistl_ST0_A0(void)
{
#if defined(__sparc__) && !defined(__sparc_v9__)
register CPU86_LDouble d asm("o0");
#else
CPU86_LDouble d;
#endif
int val;
d = ST0;
val = lrint(d);
stl((void *)A0, val);
}
void OPPROTO op_fistll_ST0_A0(void)
{
#if defined(__sparc__) && !defined(__sparc_v9__)
register CPU86_LDouble d asm("o0");
#else
CPU86_LDouble d;
#endif
int64_t val;
d = ST0;
val = llrint(d);
stq((void *)A0, val);
}
void OPPROTO op_fbld_ST0_A0(void)
{
helper_fbld_ST0_A0();
}
void OPPROTO op_fbst_ST0_A0(void)
{
helper_fbst_ST0_A0();
}
/* FPU move */
void OPPROTO op_fpush(void)
{
fpush();
}
void OPPROTO op_fpop(void)
{
fpop();
}
void OPPROTO op_fdecstp(void)
{
env->fpstt = (env->fpstt - 1) & 7;
env->fpus &= (~0x4700);
}
void OPPROTO op_fincstp(void)
{
env->fpstt = (env->fpstt + 1) & 7;
env->fpus &= (~0x4700);
}
void OPPROTO op_fmov_ST0_FT0(void)
{
ST0 = FT0;
}
void OPPROTO op_fmov_FT0_STN(void)
{
FT0 = ST(PARAM1);
}
void OPPROTO op_fmov_ST0_STN(void)
{
ST0 = ST(PARAM1);
}
void OPPROTO op_fmov_STN_ST0(void)
{
ST(PARAM1) = ST0;
}
void OPPROTO op_fxchg_ST0_STN(void)
{
CPU86_LDouble tmp;
tmp = ST(PARAM1);
ST(PARAM1) = ST0;
ST0 = tmp;
}
/* FPU operations */
/* XXX: handle nans */
void OPPROTO op_fcom_ST0_FT0(void)
{
env->fpus &= (~0x4500); /* (C3,C2,C0) <-- 000 */
if (ST0 < FT0)
env->fpus |= 0x100; /* (C3,C2,C0) <-- 001 */
else if (ST0 == FT0)
env->fpus |= 0x4000; /* (C3,C2,C0) <-- 100 */
FORCE_RET();
}
/* XXX: handle nans */
void OPPROTO op_fucom_ST0_FT0(void)
{
env->fpus &= (~0x4500); /* (C3,C2,C0) <-- 000 */
if (ST0 < FT0)
env->fpus |= 0x100; /* (C3,C2,C0) <-- 001 */
else if (ST0 == FT0)
env->fpus |= 0x4000; /* (C3,C2,C0) <-- 100 */
FORCE_RET();
}
/* XXX: handle nans */
void OPPROTO op_fcomi_ST0_FT0(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags &= ~(CC_Z | CC_P | CC_C);
if (ST0 < FT0)
eflags |= CC_C;
else if (ST0 == FT0)
eflags |= CC_Z;
CC_SRC = eflags;
FORCE_RET();
}
/* XXX: handle nans */
void OPPROTO op_fucomi_ST0_FT0(void)
{
int eflags;
eflags = cc_table[CC_OP].compute_all();
eflags &= ~(CC_Z | CC_P | CC_C);
if (ST0 < FT0)
eflags |= CC_C;
else if (ST0 == FT0)
eflags |= CC_Z;
CC_SRC = eflags;
FORCE_RET();
}
void OPPROTO op_fadd_ST0_FT0(void)
{
ST0 += FT0;
}
void OPPROTO op_fmul_ST0_FT0(void)
{
ST0 *= FT0;
}
void OPPROTO op_fsub_ST0_FT0(void)
{
ST0 -= FT0;
}
void OPPROTO op_fsubr_ST0_FT0(void)
{
ST0 = FT0 - ST0;
}
void OPPROTO op_fdiv_ST0_FT0(void)
{
ST0 /= FT0;
}
void OPPROTO op_fdivr_ST0_FT0(void)
{
ST0 = FT0 / ST0;
}
/* fp operations between STN and ST0 */
void OPPROTO op_fadd_STN_ST0(void)
{
ST(PARAM1) += ST0;
}
void OPPROTO op_fmul_STN_ST0(void)
{
ST(PARAM1) *= ST0;
}
void OPPROTO op_fsub_STN_ST0(void)
{
ST(PARAM1) -= ST0;
}
void OPPROTO op_fsubr_STN_ST0(void)
{
CPU86_LDouble *p;
p = &ST(PARAM1);
*p = ST0 - *p;
}
void OPPROTO op_fdiv_STN_ST0(void)
{
ST(PARAM1) /= ST0;
}
void OPPROTO op_fdivr_STN_ST0(void)
{
CPU86_LDouble *p;
p = &ST(PARAM1);
*p = ST0 / *p;
}
/* misc FPU operations */
void OPPROTO op_fchs_ST0(void)
{
ST0 = -ST0;
}
void OPPROTO op_fabs_ST0(void)
{
ST0 = fabs(ST0);
}
void OPPROTO op_fxam_ST0(void)
{
helper_fxam_ST0();
}
void OPPROTO op_fld1_ST0(void)
{
ST0 = f15rk[1];
}
void OPPROTO op_fldl2t_ST0(void)
{
ST0 = f15rk[6];
}
void OPPROTO op_fldl2e_ST0(void)
{
ST0 = f15rk[5];
}
void OPPROTO op_fldpi_ST0(void)
{
ST0 = f15rk[2];
}
void OPPROTO op_fldlg2_ST0(void)
{
ST0 = f15rk[3];
}
void OPPROTO op_fldln2_ST0(void)
{
ST0 = f15rk[4];
}
void OPPROTO op_fldz_ST0(void)
{
ST0 = f15rk[0];
}
void OPPROTO op_fldz_FT0(void)
{
ST0 = f15rk[0];
}
/* associated heplers to reduce generated code length and to simplify
relocation (FP constants are usually stored in .rodata section) */
void OPPROTO op_f2xm1(void)
{
helper_f2xm1();
}
void OPPROTO op_fyl2x(void)
{
helper_fyl2x();
}
void OPPROTO op_fptan(void)
{
helper_fptan();
}
void OPPROTO op_fpatan(void)
{
helper_fpatan();
}
void OPPROTO op_fxtract(void)
{
helper_fxtract();
}
void OPPROTO op_fprem1(void)
{
helper_fprem1();
}
void OPPROTO op_fprem(void)
{
helper_fprem();
}
void OPPROTO op_fyl2xp1(void)
{
helper_fyl2xp1();
}
void OPPROTO op_fsqrt(void)
{
helper_fsqrt();
}
void OPPROTO op_fsincos(void)
{
helper_fsincos();
}
void OPPROTO op_frndint(void)
{
helper_frndint();
}
void OPPROTO op_fscale(void)
{
helper_fscale();
}
void OPPROTO op_fsin(void)
{
helper_fsin();
}
void OPPROTO op_fcos(void)
{
helper_fcos();
}
void OPPROTO op_fnstsw_A0(void)
{
int fpus;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
stw((void *)A0, fpus);
}
void OPPROTO op_fnstsw_EAX(void)
{
int fpus;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
EAX = (EAX & 0xffff0000) | fpus;
}
void OPPROTO op_fnstcw_A0(void)
{
stw((void *)A0, env->fpuc);
}
void OPPROTO op_fldcw_A0(void)
{
int rnd_type;
env->fpuc = lduw((void *)A0);
/* set rounding mode */
switch(env->fpuc & RC_MASK) {
default:
case RC_NEAR:
rnd_type = FE_TONEAREST;
break;
case RC_DOWN:
rnd_type = FE_DOWNWARD;
break;
case RC_UP:
rnd_type = FE_UPWARD;
break;
case RC_CHOP:
rnd_type = FE_TOWARDZERO;
break;
}
fesetround(rnd_type);
}
void OPPROTO op_fclex(void)
{
env->fpus &= 0x7f00;
}
void OPPROTO op_fninit(void)
{
env->fpus = 0;
env->fpstt = 0;
env->fpuc = 0x37f;
env->fptags[0] = 1;
env->fptags[1] = 1;
env->fptags[2] = 1;
env->fptags[3] = 1;
env->fptags[4] = 1;
env->fptags[5] = 1;
env->fptags[6] = 1;
env->fptags[7] = 1;
}
void OPPROTO op_fnstenv_A0(void)
{
helper_fstenv((uint8_t *)A0, PARAM1);
}
void OPPROTO op_fldenv_A0(void)
{
helper_fldenv((uint8_t *)A0, PARAM1);
}
void OPPROTO op_fnsave_A0(void)
{
helper_fsave((uint8_t *)A0, PARAM1);
}
void OPPROTO op_frstor_A0(void)
{
helper_frstor((uint8_t *)A0, PARAM1);
}
/* threading support */
void OPPROTO op_lock(void)
{
cpu_lock();
}
void OPPROTO op_unlock(void)
{
cpu_unlock();
}
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