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X86: Implement a floating point media min microop.

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This commit is contained in:
Gabe Black 2009-08-17 18:32:09 -07:00
parent e20c8a4b05
commit 1d706c0434
1 changed files with 50 additions and 0 deletions
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50
src/arch/x86/isa/microops/mediaop.isa
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@ -429,4 +429,54 @@ let {{
code = '''
FpDestReg.uqw = ~FpSrcReg1.uqw & FpSrcReg2.uqw;
'''
class Mminf(MediaOp):
code = '''
union floatInt
{
float f;
uint32_t i;
};
union doubleInt
{
double d;
uint64_t i;
};
assert(srcSize == destSize);
int size = srcSize;
int sizeBits = size * 8;
assert(srcSize == 4 || srcSize == 8);
int items = (ext & 0x1) ? 1: (sizeof(FloatRegBits) / size);
uint64_t result = FpDestReg.uqw;
for (int i = 0; i < items; i++) {
double arg1, arg2;
int hiIndex = (i + 1) * sizeBits - 1;
int loIndex = (i + 0) * sizeBits;
uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex);
uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex);
if (size == 4) {
floatInt fi;
fi.i = arg1Bits;
arg1 = fi.f;
fi.i = arg2Bits;
arg2 = fi.f;
} else {
doubleInt di;
di.i = arg1Bits;
arg1 = di.d;
di.i = arg2Bits;
arg2 = di.d;
}
if (arg1 < arg2) {
result = insertBits(result, hiIndex, loIndex, arg1Bits);
} else {
result = insertBits(result, hiIndex, loIndex, arg2Bits);
}
}
FpDestReg.uqw = result;
'''
}};