summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/arch/x86/isa/microops/regop.isa2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index e86e9f00a..4d4079f5f 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -700,7 +700,7 @@ let {{
// Because what happens to the bits shift -in- on a right shift
// is not defined in the C/C++ standard, we have to sign extend
// them manually to be sure.
- uint64_t arithMask =
+ uint64_t arithMask = (shiftAmt == 0) ? 0 :
-bits(psrc1, dataSize * 8 - 1) << (dataSize * 8 - shiftAmt);
DestReg = merge(DestReg, (psrc1 >> shiftAmt) | arithMask, dataSize);
'''