static void I486OP(cmpxchg_rm32_r32)(i386_state *cpustate) // Opcode 0x0f b1
{
UINT8 modrm = FETCH(cpustate);
if( modrm >= 0xc0 ) {
UINT32 dst = LOAD_RM32(modrm);
UINT32 src = LOAD_REG32(modrm);
if( REG32(EAX) == dst ) {
STORE_RM32(modrm, src);
cpustate->ZF = 1;
CYCLES(cpustate,CYCLES_CMPXCHG_REG_REG_T);
} else {
REG32(EAX) = dst;
cpustate->ZF = 0;
CYCLES(cpustate,CYCLES_CMPXCHG_REG_REG_F);
}
} else {
UINT32 ea = GetEA(cpustate,modrm);
UINT32 dst = READ32(cpustate,ea);
UINT32 src = LOAD_REG32(modrm);
if( REG32(EAX) == dst ) {
WRITE32(cpustate,ea, src);
cpustate->ZF = 1;
CYCLES(cpustate,CYCLES_CMPXCHG_REG_MEM_T);
} else {
REG32(EAX) = dst;
cpustate->ZF = 0;
CYCLES(cpustate,CYCLES_CMPXCHG_REG_MEM_F);
}
}
}
void i386_device::i486_cmpxchg_rm32_r32() // Opcode 0x0f b1
{
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
UINT32 dst = LOAD_RM32(modrm);
UINT32 src = LOAD_REG32(modrm);
if( REG32(EAX) == dst ) {
STORE_RM32(modrm, src);
m_ZF = 1;
CYCLES(CYCLES_CMPXCHG_REG_REG_T);
} else {
REG32(EAX) = dst;
m_ZF = 0;
CYCLES(CYCLES_CMPXCHG_REG_REG_F);
}
} else {
UINT32 ea = GetEA(modrm,0);
UINT32 dst = READ32(ea);
UINT32 src = LOAD_REG32(modrm);
if( REG32(EAX) == dst ) {
WRITE32(ea, src);
m_ZF = 1;
CYCLES(CYCLES_CMPXCHG_REG_MEM_T);
} else {
REG32(EAX) = dst;
m_ZF = 0;
CYCLES(CYCLES_CMPXCHG_REG_MEM_F);
}
}
}
static void I486OP(xadd_rm32_r32)(i386_state *cpustate) // Opcode 0x0f c1
{
UINT8 modrm = FETCH(cpustate);
if( modrm >= 0xc0 ) {
UINT32 dst = LOAD_RM32(modrm);
UINT32 src = LOAD_REG32(modrm);
STORE_RM32(modrm, dst + src);
STORE_REG32(modrm, dst);
CYCLES(cpustate,CYCLES_XADD_REG_REG);
} else {
UINT32 ea = GetEA(cpustate,modrm);
UINT32 dst = READ32(cpustate,ea);
UINT32 src = LOAD_REG32(modrm);
WRITE32(cpustate,ea, dst + src);
STORE_REG32(modrm, dst);
CYCLES(cpustate,CYCLES_XADD_REG_MEM);
}
}
void i386_device::i486_xadd_rm32_r32() // Opcode 0x0f c1
{
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
UINT32 dst = LOAD_RM32(modrm);
UINT32 src = LOAD_REG32(modrm);
STORE_REG32(modrm, dst);
STORE_RM32(modrm, dst + src);
CYCLES(CYCLES_XADD_REG_REG);
} else {
UINT32 ea = GetEA(modrm,1);
UINT32 dst = READ32(ea);
UINT32 src = LOAD_REG32(modrm);
WRITE32(ea, dst + src);
STORE_REG32(modrm, dst);
CYCLES(CYCLES_XADD_REG_MEM);
}
}
