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-rw-r--r--src/arch/x86/isa/microops/mediaop.isa3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa
index 900c166f8..9a2707b59 100644
--- a/src/arch/x86/isa/microops/mediaop.isa
+++ b/src/arch/x86/isa/microops/mediaop.isa
@@ -1294,7 +1294,8 @@ let {{
int srcLoIndex = srcStart + (i + 0) * srcSizeBits;
uint64_t argBits = bits(FpSrcReg1.uqw, srcHiIndex, srcLoIndex);
- int64_t sArg = argBits | (0 - (argBits & (ULL(1) << srcHiIndex)));
+ int64_t sArg = argBits |
+ (0 - (argBits & (ULL(1) << (srcSizeBits - 1))));
double arg = sArg;
if (destSize == 4) {