changeset 580a6fbc7585 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=580a6fbc7585
description:
X86: Fix the carry flag for shr.
diffstat:
1 file changed, 4 insertions(+), 1 deletion(-)
src/arch/x86/isa/microops/regop.isa | 5 ++++-
diffs (16 lines):
diff -r 801f1fc07a58 -r 580a6fbc7585 src/arch/x86/isa/microops/regop.isa
--- a/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:56:38 2009 -0700
+++ b/src/arch/x86/isa/microops/regop.isa Wed Aug 05 02:56:49 2009 -0700
@@ -680,8 +680,11 @@
//worry about setting them.
ccFlagBits = ccFlagBits & ~(ext & (CFBit | ECFBit | OFBit));
//If some combination of the CF bits need to be set, set them.
- if ((ext & (CFBit | ECFBit)) && bits(SrcReg1, shiftAmt - 1))
+ if ((ext & (CFBit | ECFBit)) &&
+ shiftAmt <= dataSize * 8 &&
+ bits(SrcReg1, shiftAmt - 1)) {
ccFlagBits = ccFlagBits | (ext & (CFBit | ECFBit));
+ }
//Figure out what the OF bit should be.
if ((ext & OFBit) && bits(SrcReg1, dataSize * 8 - 1))
ccFlagBits = ccFlagBits | OFBit;
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