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| author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:06 -0500 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:06 -0500 |
| commit | 8ba812f1fbcf44b21fa7967380bfae0499dbfd35 (patch) | |
| tree | f0a3c5ecaed248cb38bf5123c04241ac264b500a /src/arch/arm/isa | |
| parent | a895514d35d4011f3110ad4d8290287d7b7b6856 (diff) | |
| download | gem5-8ba812f1fbcf44b21fa7967380bfae0499dbfd35.tar.xz | |
ARM: Implement signed add/subtract and subtract/add.
Diffstat (limited to 'src/arch/arm/isa')
| -rw-r--r-- | src/arch/arm/isa/insts/data.isa | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/arch/arm/isa/insts/data.isa b/src/arch/arm/isa/insts/data.isa index 4efbae574..73871c873 100644 --- a/src/arch/arm/isa/insts/data.isa +++ b/src/arch/arm/isa/insts/data.isa @@ -428,6 +428,46 @@ let {{ Dest = resTemp; resTemp = geBits; ''', flagType="ge", buildNonCc=False) + buildRegDataInst("sasx", ''' + int32_t midRes, geBits = 0; + resTemp = 0; + int64_t arg1Low = sext<16>(bits(Op1.sw, 15, 0)); + int64_t arg1High = sext<16>(bits(Op1.sw, 31, 16)); + int64_t arg2Low = sext<16>(bits(Op2.sw, 15, 0)); + int64_t arg2High = sext<16>(bits(Op2.sw, 31, 16)); + midRes = arg1Low - arg2High; + if (midRes >= 0) { + geBits = geBits | 0x3; + } + replaceBits(resTemp, 15, 0, midRes); + midRes = arg1High + arg2Low; + if (midRes >= 0) { + geBits = geBits | 0xc; + } + replaceBits(resTemp, 31, 16, midRes); + Dest = resTemp; + resTemp = geBits; + ''', flagType="ge", buildNonCc=True) + buildRegDataInst("ssax", ''' + int32_t midRes, geBits = 0; + resTemp = 0; + int64_t arg1Low = sext<16>(bits(Op1.sw, 15, 0)); + int64_t arg1High = sext<16>(bits(Op1.sw, 31, 16)); + int64_t arg2Low = sext<16>(bits(Op2.sw, 15, 0)); + int64_t arg2High = sext<16>(bits(Op2.sw, 31, 16)); + midRes = arg1Low + arg2High; + if (midRes >= 0) { + geBits = geBits | 0x3; + } + replaceBits(resTemp, 15, 0, midRes); + midRes = arg1High - arg2Low; + if (midRes >= 0) { + geBits = geBits | 0xc; + } + replaceBits(resTemp, 31, 16, midRes); + Dest = resTemp; + resTemp = geBits; + ''', flagType="ge", buildNonCc=True) buildRegDataInst("uqadd16", ''' uint32_t midRes; |