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[05/14] target/s390x: Disable conditional branch-to-next for PER

Message ID 20240502054417.234340-6-richard.henderson@linaro.org
State New
Headers show
Series target/s390x: Fix and improve PER | expand

Commit Message

Richard Henderson May 2, 2024, 5:44 a.m. UTC 
For PER, we require a conditional call to helper_per_branch
for the conditional branch.  Fold the remaining optimization
into a call to helper_goto_direct, which will take care of
the remaining gbea adjustment.

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/s390x/tcg/translate.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 3622c5c883..c3c821430d 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -1133,13 +1133,13 @@  static DisasJumpType help_branch(DisasContext *s, DisasCompare *c,
         goto egress;
     }
     if (is_imm) {
-        if (dest == s->pc_tmp) {
-            /* Branch to next.  */
-            per_branch(s, true);
-            ret = DISAS_NEXT;
-            goto egress;
-        }
-        if (c->cond == TCG_COND_ALWAYS) {
+        /*
+         * Do not optimize a conditional branch if PER enabled, because we
+         * still need a conditional call to helper_per_branch.
+         */
+        if (c->cond == TCG_COND_ALWAYS
+            || (dest == s->pc_tmp &&
+                !(s->base.tb->flags & FLAG_MASK_PER_BRANCH))) {
             ret = help_goto_direct(s, dest);
             goto egress;
         }