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author | Gabe Black <gblack@eecs.umich.edu> | 2009-08-17 18:40:38 -0700 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2009-08-17 18:40:38 -0700 |
commit | af3a53726b74f12e7ce256eff0407fe20a528179 (patch) | |
tree | 4a9ad3e248d7b97388d55fee901192474857a17e | |
parent | fcb5b2226c540fd4a94d7a6eff62869c4ba234ea (diff) | |
download | gem5-af3a53726b74f12e7ce256eff0407fe20a528179.tar.xz |
X86: Implement a floating point media divide microop.
-rw-r--r-- | src/arch/x86/isa/microops/mediaop.isa | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa index 16cfbb5f9..edfc27908 100644 --- a/src/arch/x86/isa/microops/mediaop.isa +++ b/src/arch/x86/isa/microops/mediaop.isa @@ -712,4 +712,50 @@ let {{ } FpDestReg.uqw = result; ''' + + class Mdivf(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++) { + 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); + uint64_t resBits; + + if (size == 4) { + floatInt arg1, arg2, res; + arg1.i = arg1Bits; + arg2.i = arg2Bits; + res.f = arg1.f / arg2.f; + resBits = res.i; + } else { + doubleInt arg1, arg2, res; + arg1.i = arg1Bits; + arg2.i = arg2Bits; + res.d = arg1.d / arg2.d; + resBits = res.i; + } + + result = insertBits(result, hiIndex, loIndex, resBits); + } + FpDestReg.uqw = result; + ''' }}; |