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x64Emitter: Support FLD/FSTP with 80 bits operands

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This commit is contained in:
Pierre Bourdon
2014-09-02 08:55:38 +02:00
parent f99f302c91
commit cc0b048c0b
2 changed files with 16 additions and 10 deletions
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20
Source/Core/Common/x64Emitter.cpp
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@ -1660,25 +1660,27 @@ void XEmitter::FWAIT()
}
// TODO: make this more generic
void XEmitter::WriteFloatLoadStore(int bits, FloatOp op, OpArg arg)
void XEmitter::WriteFloatLoadStore(int bits, FloatOp op, FloatOp op_80b, OpArg arg)
{
int mf = 0;
_assert_msg_(DYNA_REC, !(bits == 80 && op_80b == floatINVALID), "WriteFloatLoadStore: 80 bits not supported for this instruction");
switch (bits)
{
case 32: mf = 0; break;
case 64: mf = 2; break;
default: _assert_msg_(DYNA_REC, 0, "WriteFloatLoadStore: bits is not 32 or 64");
case 64: mf = 4; break;
case 80: mf = 2; break;
default: _assert_msg_(DYNA_REC, 0, "WriteFloatLoadStore: invalid bits (should be 32/64/80)");
}
Write8(0xd9 | (mf << 1));
Write8(0xd9 | mf);
// x87 instructions use the reg field of the ModR/M byte as opcode:
if (bits == 80)
op = op_80b;
arg.WriteRest(this, 0, (X64Reg) op);
}
void XEmitter::FLD(int bits, OpArg src) {WriteFloatLoadStore(bits, floatLD, src);}
void XEmitter::FST(int bits, OpArg dest) {WriteFloatLoadStore(bits, floatST, dest);}
void XEmitter::FSTP(int bits, OpArg dest) {WriteFloatLoadStore(bits, floatSTP, dest);}
void XEmitter::FLD(int bits, OpArg src) {WriteFloatLoadStore(bits, floatLD, floatLD80, src);}
void XEmitter::FST(int bits, OpArg dest) {WriteFloatLoadStore(bits, floatST, floatINVALID, dest);}
void XEmitter::FSTP(int bits, OpArg dest) {WriteFloatLoadStore(bits, floatSTP, floatSTP80, dest);}
void XEmitter::FNSTSW_AX() { Write8(0xDF); Write8(0xE0); }
void XEmitter::RDTSC() { Write8(0x0F); Write8(0x31); }