changeset cc8568cfce8f in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=cc8568cfce8f
description:
X86: Handle left rotations that go all the way around or more.
diffstat:
1 file changed, 4 insertions(+), 3 deletions(-)
src/arch/x86/isa/microops/regop.isa | 7 ++++---
diffs (19 lines):
diff -r 647111272094 -r cc8568cfce8f src/arch/x86/isa/microops/regop.isa
--- a/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:58:20 2009 -0700
+++ b/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:58:54 2009 -0700
@@ -796,11 +796,12 @@
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
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