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target/i386/emulate: more lflags cleanups

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2025-05-27 19:21:19 +02:00
parent 734a1e9eee
commit 341ed3eae4
1 changed files with 8 additions and 8 deletions
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target/i386/emulate/x86_flags.c
+8 -8
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@@ -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;
}