From patchwork Wed Mar 31 07:41:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Liebler X-Patchwork-Id: 42817 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 2C0AD3858031; Wed, 31 Mar 2021 07:42:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2C0AD3858031 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1617176523; bh=mXMEvl2PYqpkYjZKGgCT1HziK0SqymbvAvJyLsM16f4=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:Cc:From; b=Vnw1sKHq4bgCny2v3jmF06U6bONW95RAdlC9ZASNAXJLSNteiKebxS9psQhbUttV4 zpTnHifVALP0ONPLvlT43LmtpXi/euLrqBbmqsob5avDRqqKiofmmbY65oXLnzI9rl VAjJITqdeirScrEJA0OvOQGafyeyOctxcefxuyFc= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by sourceware.org (Postfix) with ESMTPS id 7D61D385802E for ; Wed, 31 Mar 2021 07:41:53 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 7D61D385802E Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 12V7XJ5s190946 for ; Wed, 31 Mar 2021 03:41:52 -0400 Received: from ppma01fra.de.ibm.com (46.49.7a9f.ip4.static.sl-reverse.com [159.122.73.70]) by mx0a-001b2d01.pphosted.com with ESMTP id 37mm5jhbsg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 31 Mar 2021 03:41:51 -0400 Received: from pps.filterd (ppma01fra.de.ibm.com [127.0.0.1]) by ppma01fra.de.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 12V7cijC013132 for ; Wed, 31 Mar 2021 07:41:49 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma01fra.de.ibm.com with ESMTP id 37maat06ur-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 31 Mar 2021 07:41:49 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 12V7fkri35914192 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 31 Mar 2021 07:41:46 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DD0BDA4064; Wed, 31 Mar 2021 07:41:45 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C3731A4060; Wed, 31 Mar 2021 07:41:45 +0000 (GMT) Received: from t35lp56.lnxne.boe (unknown [9.152.108.100]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 31 Mar 2021 07:41:45 +0000 (GMT) To: libc-alpha@sourceware.org Subject: [PATCH] S390: Allow "v" constraint for long double math_opt_barrier and math_force_eval with GCC 11. Date: Wed, 31 Mar 2021 09:41:37 +0200 Message-Id: <20210331074137.1046367-1-stli@linux.ibm.com> X-Mailer: git-send-email 2.29.2 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: ZyfWhE6UaKCFTWuG8S2aFTcZRpXzKyWy X-Proofpoint-GUID: ZyfWhE6UaKCFTWuG8S2aFTcZRpXzKyWy X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-31_01:2021-03-30, 2021-03-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 impostorscore=0 malwarescore=0 mlxlogscore=967 clxscore=1015 spamscore=0 mlxscore=0 bulkscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103300000 definitions=main-2103310052 X-Spam-Status: No, score=-11.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Stefan Liebler via Libc-alpha From: Stefan Liebler Reply-To: Stefan Liebler Cc: Stefan Liebler Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" Starting with GCC 11, long double values can also be processed in vector registers if build with -march >= z14. Then GCC defines the __LONG_DOUBLE_VX__ macro. FYI: GCC commit "IBM Z: Introduce __LONG_DOUBLE_VX__ macro" https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=f47df2af313d2ce7f9149149010a142c2237beda --- sysdeps/s390/fpu/math-barriers.h | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/sysdeps/s390/fpu/math-barriers.h b/sysdeps/s390/fpu/math-barriers.h index 68a3e55098..a47cda8b24 100644 --- a/sysdeps/s390/fpu/math-barriers.h +++ b/sysdeps/s390/fpu/math-barriers.h @@ -25,9 +25,22 @@ # define ASM_CONSTRAINT_VR #endif +/* Starting with gcc 11, long double values can also be processed in vector + registers if build with -march >= z14. Then GCC defines the + __LONG_DOUBLE_VX__ macro. */ +#ifdef __LONG_DOUBLE_VX__ +# define ASM_LONG_DOUBLE_IN_VR 1 +#else +# define ASM_LONG_DOUBLE_IN_VR 0 +#endif + #define math_opt_barrier(x) \ ({ __typeof (x) __x = (x); \ - if (__builtin_types_compatible_p (__typeof (x), _Float128)) \ + if (! ASM_LONG_DOUBLE_IN_VR \ + && (__builtin_types_compatible_p (__typeof (x), _Float128) \ + || __builtin_types_compatible_p (__typeof (x), long double) \ + ) \ + ) \ __asm__ ("# math_opt_barrier_f128 %0" : "+fm" (__x)); \ else \ __asm__ ("# math_opt_barrier %0" \ @@ -35,7 +48,11 @@ __x; }) #define math_force_eval(x) \ ({ __typeof (x) __x = (x); \ - if (__builtin_types_compatible_p (__typeof (x), _Float128)) \ + if (! ASM_LONG_DOUBLE_IN_VR \ + && (__builtin_types_compatible_p (__typeof (x), _Float128) \ + || __builtin_types_compatible_p (__typeof (x), long double) \ + ) \ + ) \ __asm__ __volatile__ ("# math_force_eval_f128 %0" \ : : "fm" (__x)); \ else \