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bh=rJ+27ZTIPKuiVc0o8qZqa52r5nGNmKQfLzK98i0xub4=; b=cFpVfds3iVKw3VikrvMnDAQKTDJoTuSvKSdVcsFFSp94nvttqjE0YPd9gZCeHHBVJmpeOY 9EWEtT2SXasKjGR3qA1wRM2prbSSj+kNpV76lkH2+E5Y6q6YLMbpaI0wlBQo3A27wtl6RP dxfJZ+1cD/MK0vXGT9hw8p1UQmjLcPw= X-MC-Unique: AAcK9wkiOtGBcoFIcmcMMw-1 From: Thomas Huth To: qemu-devel@nongnu.org, Richard Henderson Cc: qemu-s390x@nongnu.org, Ilya Leoshkevich Subject: [PULL 05/22] target/s390x: Disable conditional branch-to-next for PER Date: Wed, 29 May 2024 12:54:37 +0200 Message-ID: <20240529105454.1149225-6-thuth@redhat.com> In-Reply-To: <20240529105454.1149225-1-thuth@redhat.com> References: <20240529105454.1149225-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.036, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1716980195093100003 Content-Type: text/plain; charset="utf-8" From: Richard Henderson 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 Signed-off-by: Richard Henderson Message-ID: <20240502054417.234340-6-richard.henderson@linaro.org> Signed-off-by: Thomas Huth --- target/s390x/tcg/translate.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index de98115c4d..07620948ae 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -1131,13 +1131,13 @@ static DisasJumpType help_branch(DisasContext *s, D= isasCompare *c, goto egress; } if (is_imm) { - if (dest =3D=3D s->pc_tmp) { - /* Branch to next. */ - per_branch(s, true); - ret =3D DISAS_NEXT; - goto egress; - } - if (c->cond =3D=3D 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 =3D=3D TCG_COND_ALWAYS + || (dest =3D=3D s->pc_tmp && + !(s->base.tb->flags & FLAG_MASK_PER_BRANCH))) { ret =3D help_goto_direct(s, dest); goto egress; } --=20 2.45.1