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| author | Gabe Black <gblack@eecs.umich.edu> | 2009-08-05 02:58:54 -0700 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2009-08-05 02:58:54 -0700 |
| commit | 7f9a3af25014dd8f022968047a9f6f5198079a16 (patch) | |
| tree | bea093b4f6e47ac7c4f6e511b143b457f942bc66 /src/arch | |
| parent | 99adfd9dae5c846ebc2493fee7346aef96c96ec5 (diff) | |
| download | gem5-7f9a3af25014dd8f022968047a9f6f5198079a16.tar.xz | |
X86: Handle left rotations that go all the way around or more.
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/isa/microops/regop.isa | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index 5461223a3..447939abd 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -796,11 +796,12 @@ let {{ code = ''' uint8_t shiftAmt = (op2 & ((dataSize == 8) ? mask(6) : mask(5))); - if(shiftAmt) + uint8_t realShiftAmt = shiftAmt % (dataSize * 8); + if(realShiftAmt) { - uint64_t top = psrc1 << shiftAmt; + uint64_t top = psrc1 << realShiftAmt; uint64_t bottom = - bits(psrc1, dataSize * 8 - 1, dataSize * 8 - shiftAmt); + bits(psrc1, dataSize * 8 - 1, dataSize * 8 - realShiftAmt); DestReg = merge(DestReg, top | bottom, dataSize); } else |