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authorGabe Black <gblack@eecs.umich.edu>2009-08-05 03:00:03 -0700
committerGabe Black <gblack@eecs.umich.edu>2009-08-05 03:00:03 -0700
commit64d794869271485b79123951d5b198b8a9b12885 (patch)
tree2463988e7665930c35cfdb0ea9c30ee2a3d8b2e0
parent88041f75c44680f07e707339afd8fb81526fd256 (diff)
downloadgem5-64d794869271485b79123951d5b198b8a9b12885.tar.xz
X86: Handle rotating right all the way around or more.
-rw-r--r--src/arch/x86/isa/microops/regop.isa7
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 85fe8fe51..2514be91a 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -727,10 +727,11 @@ 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 << (dataSize * 8 - shiftAmt);
- uint64_t bottom = bits(psrc1, dataSize * 8, shiftAmt);
+ uint64_t top = psrc1 << (dataSize * 8 - realShiftAmt);
+ uint64_t bottom = bits(psrc1, dataSize * 8, realShiftAmt);
DestReg = merge(DestReg, top | bottom, dataSize);
}
else