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X86: Handle left rotations that go all the way around or more.

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Gabe Black 2009-08-05 02:58:54 -07:00
parent 99adfd9dae
commit 7f9a3af250
1 changed files with 4 additions and 3 deletions
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7
src/arch/x86/isa/microops/regop.isa
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@ -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