diff options
Diffstat (limited to 'target/i386/emulate/x86_flags.c')
| -rw-r--r-- | target/i386/emulate/x86_flags.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/target/i386/emulate/x86_flags.c b/target/i386/emulate/x86_flags.c index 47bc197..6592193 100644 --- a/target/i386/emulate/x86_flags.c +++ b/target/i386/emulate/x86_flags.c @@ -14,8 +14,8 @@ // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public -// License along with this library; if not, write to the Free Software -// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA +// License along with this library; if not, see +// <https://www.gnu.org/licenses/>. ///////////////////////////////////////////////////////////////////////// /* * flags functions @@ -255,19 +255,19 @@ void lflags_to_rflags(CPUX86State *env) void rflags_to_lflags(CPUX86State *env) { - target_ulong cf_xor_of; + target_ulong cf_af, cf_xor_of; + /* Leave the low byte zero so that parity is always even... */ + env->cc_dst = !(env->eflags & CC_Z) << 8; + + /* ... and therefore cc_src always uses opposite polarity. */ env->cc_src = CC_P; env->cc_src ^= env->eflags & (CC_S | CC_P); /* rotate right by one to move CF and AF into the carry-out positions */ - env->cc_src |= ( - (env->eflags >> 1) | - (env->eflags << (TARGET_LONG_BITS - 1))) & (CC_C | CC_A); + cf_af = env->eflags & (CC_C | CC_A); + env->cc_src |= ((cf_af >> 1) | (cf_af << (TARGET_LONG_BITS - 1))); - cf_xor_of = (env->eflags & (CC_C | CC_O)) + (CC_O - CC_C); + cf_xor_of = ((env->eflags & (CC_C | CC_O)) + (CC_O - CC_C)) & CC_O; env->cc_src |= -cf_xor_of & LF_MASK_PO; - - /* Leave the low byte zero so that parity is not affected. */ - env->cc_dst = !(env->eflags & CC_Z) << 8; } |