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pentium: More support of the magic 0x66 prefix [O. Galibert]

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This commit is contained in:
Olivier Galibert 2014-11-20 17:35:09 +01:00
parent 7414d7b10b
commit 4aa10d383f
1 changed files with 29 additions and 7 deletions
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36
src/emu/cpu/i386/pentops.inc
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@ -1892,10 +1892,16 @@ void i386_device::mmx_movd_r64_rm32() // Opcode 0f 6e
MMXPROLOG();
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
MMX((modrm >> 3) & 0x7).d[0]=LOAD_RM32(modrm);
if (m_xmm_operand_size)
XMM((modrm >> 3) & 0x7).d[0]=LOAD_RM32(modrm);
else
MMX((modrm >> 3) & 0x7).d[0]=LOAD_RM32(modrm);
} else {
UINT32 ea = GetEA(modrm, 0);
MMX((modrm >> 3) & 0x7).d[0]=READ32(ea);
if (m_xmm_operand_size)
XMM((modrm >> 3) & 0x7).d[0]=READ32(ea);
else
MMX((modrm >> 3) & 0x7).d[0]=READ32(ea);
}
MMX((modrm >> 3) & 0x7).d[1]=0;
CYCLES(1); // TODO: correct cycle count
@ -1906,10 +1912,17 @@ void i386_device::mmx_movq_r64_rm64() // Opcode 0f 6f
MMXPROLOG();
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
MMX((modrm >> 3) & 0x7).l=MMX(modrm & 0x7).l;
if (m_xmm_operand_size)
XMM((modrm >> 3) & 0x7).l[0]=XMM(modrm & 0x7).l[0];
else
MMX((modrm >> 3) & 0x7).l=MMX(modrm & 0x7).l;
} else {
UINT32 ea = GetEA(modrm, 0);
READMMX(ea, MMX((modrm >> 3) & 0x7));
if (m_xmm_operand_size)
READXMM_LO64(ea, XMM((modrm >> 3) & 0x7));
else
READMMX(ea, MMX((modrm >> 3) & 0x7));
}
CYCLES(1); // TODO: correct cycle count
}
@ -1919,10 +1932,16 @@ void i386_device::mmx_movd_rm32_r64() // Opcode 0f 7e
MMXPROLOG();
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
STORE_RM32(modrm, MMX((modrm >> 3) & 0x7).d[0]);
if (m_xmm_operand_size)
STORE_RM32(modrm, XMM((modrm >> 3) & 0x7).d[0]);
else
STORE_RM32(modrm, MMX((modrm >> 3) & 0x7).d[0]);
} else {
UINT32 ea = GetEA(modrm, 0);
WRITE32(ea, MMX((modrm >> 3) & 0x7).d[0]);
if (m_xmm_operand_size)
WRITE32(ea, XMM((modrm >> 3) & 0x7).d[0]);
else
WRITE32(ea, MMX((modrm >> 3) & 0x7).d[0]);
}
CYCLES(1); // TODO: correct cycle count
}
@ -1932,7 +1951,10 @@ void i386_device::mmx_movq_rm64_r64() // Opcode 0f 7f
MMXPROLOG();
UINT8 modrm = FETCH();
if( modrm >= 0xc0 ) {
MMX(modrm & 0x7)=MMX((modrm >> 3) & 0x7);
if (m_xmm_operand_size)
XMM(modrm & 0x7).l[0]=XMM((modrm >> 3) & 0x7).l[0];
else
MMX(modrm & 0x7)=MMX((modrm >> 3) & 0x7);
} else {
UINT32 ea = GetEA(modrm, 0);
WRITEMMX(ea, MMX((modrm >> 3) & 0x7));