diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86/isa/microops/regop.isa | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index e3ad164eb..0bf3420b8 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -777,13 +777,15 @@ let {{ flag_code = ''' // If the shift amount is zero, no flags should be modified. if (shiftAmt) { + int origCFBit = (ccFlagBits & CFBit) ? 1 : 0; //Zero out any flags we might modify. This way we only have to //worry about setting them. ccFlagBits = ccFlagBits & ~(ext & (CFBit | ECFBit | OFBit)); //Figure out what the OF bit should be. - if ((ext & OFBit) && ((ccFlagBits & CFBit) ^ - bits(SrcReg1, dataSize * 8 - 1))) + if ((ext & OFBit) && (origCFBit ^ + bits(SrcReg1, dataSize * 8 - 1))) { ccFlagBits = ccFlagBits | OFBit; + } //If some combination of the CF bits need to be set, set them. if ((ext & (CFBit | ECFBit)) && bits(SrcReg1, shiftAmt - 1)) ccFlagBits = ccFlagBits | (ext & (CFBit | ECFBit)); |