diff mbox series

[PULL,06/23] target/i386: try not to force EFLAGS computation for CC_OP_ADOX/ADCX

Message ID 20240622061558.530543-7-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/23] configure: detect --cpu=mipsisa64r6 | expand

Commit Message

Paolo Bonzini June 22, 2024, 6:15 a.m. UTC 
When computing the "other" flag (CF for CC_OP_ADOX, OF for CC_OP_ADCX),
take into account that it is already in the right position of cpu_cc_src,
just like for CC_OP_EFLAGS.  There is no need to call gen_compute_eflags().

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 257110ac703..08db40681fa 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -928,6 +928,7 @@  static CCPrepare gen_prepare_eflags_c(DisasContext *s, TCGv reg)
                              .no_setcond = true };
 
     case CC_OP_EFLAGS:
+    case CC_OP_ADOX:
     case CC_OP_SARB ... CC_OP_SARQ:
         /* CC_SRC & 1 */
         return (CCPrepare) { .cond = TCG_COND_TSTNE,
@@ -994,6 +995,9 @@  static CCPrepare gen_prepare_eflags_o(DisasContext *s, TCGv reg)
         return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src };
     default:
         gen_compute_eflags(s);
+        /* fallthrough */
+    case CC_OP_EFLAGS:
+    case CC_OP_ADCX:
         return (CCPrepare) { .cond = TCG_COND_TSTNE, .reg = cpu_cc_src,
                              .imm = CC_O };
     }