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Tue, 31 Oct 2023 05:37:28 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2EDB820043; Tue, 31 Oct 2023 05:37:28 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A948E20040; Tue, 31 Oct 2023 05:37:27 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.171.47.192]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 31 Oct 2023 05:37:27 +0000 (GMT) From: Ilya Leoshkevich To: Richard Henderson , David Hildenbrand Cc: Thomas Huth , qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Michael Tokarev , Ilya Leoshkevich , qemu-stable@nongnu.org Subject: [PATCH 3/4] target/s390x: Fix LAALG not updating cc_src Date: Tue, 31 Oct 2023 06:32:29 +0100 Message-ID: <20231031053718.347100-4-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231031053718.347100-1-iii@linux.ibm.com> References: <20231031053718.347100-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: YqWtxwhlclE3YJOqgiWXSepNEtzeq64w X-Proofpoint-ORIG-GUID: 0HVHc8RkcNCVH6TKK7czG5gWgews99o9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-30_13,2023-10-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=770 lowpriorityscore=0 suspectscore=0 spamscore=0 impostorscore=0 adultscore=0 priorityscore=1501 malwarescore=0 mlxscore=0 bulkscore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2310310042 Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org LAALG uses op_laa() and cout_addu64(). The latter expects cc_src to be set, but the former does not do it. This can lead to assertion failures if something sets cc_src to neither 0 nor 1 before. Fix by setting cc_src in op_laa(). Fixes: 4dba4d6fef61 ("target/s390x: Use atomic operations for LOAD AND OP") Cc: qemu-stable@nongnu.org Signed-off-by: Ilya Leoshkevich --- target/s390x/tcg/translate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index a0d6a2a35dd..db386ea94d8 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -2684,7 +2684,8 @@ static DisasJumpType op_laa(DisasContext *s, DisasOps *o) tcg_gen_atomic_fetch_add_i64(o->in2, o->in2, o->in1, get_mem_index(s), s->insn->data | MO_ALIGN); /* However, we need to recompute the addition for setting CC. */ - tcg_gen_add_i64(o->out, o->in1, o->in2); + tcg_gen_movi_i64(cc_src, 0); + tcg_gen_add2_i64(o->out, cc_src, o->in1, cc_src, o->in2, cc_src); return DISAS_NEXT; }