changeset 801f1fc07a58 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=801f1fc07a58
description:
X86: Fix the carry flag for shl.
diffstat:
1 file changed, 3 insertions(+), 1 deletion(-)
src/arch/x86/isa/microops/regop.isa | 4 +++-
diffs (15 lines):
diff -r 78d25904f66a -r 801f1fc07a58 src/arch/x86/isa/microops/regop.isa
--- a/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:56:12 2009 -0700
+++ b/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:56:38 2009 -0700
@@ -648,8 +648,10 @@
ccFlagBits = ccFlagBits & ~(ext & (CFBit | ECFBit | OFBit));
int CFBits = 0;
//Figure out if we -would- set the CF bits if requested.
- if (bits(SrcReg1, dataSize * 8 - shiftAmt))
+ if (shiftAmt <= dataSize * 8 &&
+ bits(SrcReg1, dataSize * 8 - shiftAmt)) {
CFBits = 1;
+ }
//If some combination of the CF bits need to be set, set them.
if ((ext & (CFBit | ECFBit)) && CFBits)
ccFlagBits = ccFlagBits | (ext & (CFBit | ECFBit));
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