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authorGabe Black <gblack@eecs.umich.edu>2010-05-12 00:51:35 -0700
committerGabe Black <gblack@eecs.umich.edu>2010-05-12 00:51:35 -0700
commitc4497dbf031ab250c1c1702f6952917d1de3f565 (patch)
treeabda6081a72ea935b502e5ed7e71054eca8f54c0 /src/arch/x86/isa
parentcc76842f830f15b12c0f4a64e90fe3ca9e35a45a (diff)
downloadgem5-c4497dbf031ab250c1c1702f6952917d1de3f565.tar.xz
X86: Make the cvti2f microop sign extend its integer source correctly.
The code was using the wrong bit as the sign bit. Other similar bits of code seem to be correct.
Diffstat (limited to 'src/arch/x86/isa')
-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) {