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GET /api/patches/2215734/?format=api
{ "id": 2215734, "url": "http://patchwork.ozlabs.org/api/patches/2215734/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/cc3b3b97-90c7-4a1e-9a9d-60364657f932@linux.ibm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<cc3b3b97-90c7-4a1e-9a9d-60364657f932@linux.ibm.com>", "list_archive_url": null, "date": "2026-03-25T08:53:21", "name": "[V2] rs6000: Fix [su]mul_highpart patterns to use unspec [PR122665]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e9f1b210d07163e59a5e753479abb17841254541", "submitter": { "id": 88218, "url": "http://patchwork.ozlabs.org/api/people/88218/?format=api", "name": "jeevitha", "email": "jeevitha@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/cc3b3b97-90c7-4a1e-9a9d-60364657f932@linux.ibm.com/mbox/", "series": [ { "id": 497396, "url": "http://patchwork.ozlabs.org/api/series/497396/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=497396", "date": "2026-03-25T08:53:21", "name": "[V2] rs6000: Fix [su]mul_highpart patterns to use unspec [PR122665]", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/497396/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215734/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215734/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=IkcLk1nG;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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charset=UTF-8", "Content-Transfer-Encoding": "7bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-GUID": "Bwwv825AvPra05OpgozC-z5lQ3MBk2It", "X-Proofpoint-ORIG-GUID": "Bwwv825AvPra05OpgozC-z5lQ3MBk2It", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzI1MDA2MiBTYWx0ZWRfX5qGy5zcbNdEX\n 256xqtttNGCIVjZjeoa4HejGyy1aOGrIQnfGnLD10LH64aUsIYek/RBrHONDBbiwh1RynMAA35L\n 22PNmqv8b2euA1wQVkvKCzm9Om0KnCiP+6FPne/qr17xGPds1hGn8PlCuaZfz/DyJJAXbwkF8sC\n rKLJ31K+0ey3tvumB1QsyBsI6pbOSFyZ+Q2151Et3qsnDwKoWhGUtGI2gbVMxNhVdQllIF6ZCPM\n nvI7gvzegqJJKrQpK77+I2UB+7SFt5k4F9e8QVCHYMFPmRuwDlY0qDgmuEUjex0vkM5LVwDTdKN\n z/H8zXvuwNDYKEsPAZevlBLtXAt7FwDIjpauhEdiK8U1rOXwgSxWf1GhxssXJtaXzTgNDOex5of\n v/LG+bPom8immFt0kXRVM/y0/LwkHFcAB5B7AA63bEgBRZJB2NR3/uQjGyyT+wYF5sGH7eRF+o3\n UmRtNAQnpaRAOCtwTuA==", "X-Authority-Analysis": "v=2.4 cv=KbXfcAYD c=1 sm=1 tr=0 ts=69c3a287 cx=c_pps\n a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17\n a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8\n a=Ef7soKIlfam-QSBKTVMA:9 a=QEXdDO2ut3YA:10", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-03-25_03,2026-03-24_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1015\n priorityscore=1501 bulkscore=0 lowpriorityscore=0 phishscore=0 spamscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250062", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Hi All,\n\nThe following patch is to fix PR122665 has been bootstrapped and regtested on\npowerpc64le-linux.\n\nChanges from V1:\n * Moved the unspec declarations from vsx.md to rs6000.md, as these\n will be reused in future RFC implementation.\n\nrs6000: Fix [su]mul_highpart patterns to use unspec [PR122665]\n\nThe existing smul<mode>3_highpart and umul<mode>3_highpart patterns\nincorrectly defined the high-part multiply by shifting both operands\nbefore multiplication. This does not match the semantics of the\ninstructions vmulhs<wd> and vmulhu<wd>, which perform a widened\nmultiplication and then return the high part.\n\nThis patch replaces the incorrect patterns with UNSPEC_VMULHS and\nUNSPEC_VMULHU forms, and updates the predicate to use\naltivec_register_operand, since these instructions accept only\nAltivec registers.\n\n2025-03-25 Jeevitha Palanisamy <jeevitha@linux.ibm.com>\n\ngcc/\n\tPR target/122665\n\t* config/rs6000/rs6000.md (UNSPEC_VMULHS, UNSPEC_VMULHU): New.\n\t* config/rs6000/vsx.md (smul<mode>3_highpart): Use UNSPEC_VMULHS.\n\t(umul<mode>3_highpart): Use UNSPEC_VMULHU.", "diff": "diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md\nindex 3089551552c..a5481df6880 100644\n--- a/gcc/config/rs6000/rs6000.md\n+++ b/gcc/config/rs6000/rs6000.md\n@@ -173,6 +173,8 @@\n UNSPEC_XXSPLTIW_CONST\n UNSPEC_FMAX\n UNSPEC_FMIN\n+ UNSPEC_VMULHS\n+ UNSPEC_VMULHU\n ])\n \n ;;\ndiff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md\nindex cfad9b8c6d5..f4979e447de 100644\n--- a/gcc/config/rs6000/vsx.md\n+++ b/gcc/config/rs6000/vsx.md\n@@ -6547,25 +6547,19 @@\n (set_attr \"size\" \"<bits>\")])\n \n (define_insn \"smul<mode>3_highpart\"\n- [(set (match_operand:VIlong 0 \"vsx_register_operand\" \"=v\")\n-\t(mult:VIlong (ashiftrt\n-\t\t (match_operand:VIlong 1 \"vsx_register_operand\" \"v\")\n-\t\t (const_int 32))\n-\t\t (ashiftrt\n-\t\t (match_operand:VIlong 2 \"vsx_register_operand\" \"v\")\n-\t\t (const_int 32))))]\n+ [(set (match_operand:VIlong 0 \"altivec_register_operand\" \"=v\")\n+ (unspec:VIlong [(match_operand:VIlong 1 \"altivec_register_operand\" \"v\")\n+ (match_operand:VIlong 2 \"altivec_register_operand\" \"v\")]\n+ UNSPEC_VMULHS))]\n \"TARGET_POWER10\"\n \"vmulhs<wd> %0,%1,%2\"\n [(set_attr \"type\" \"veccomplex\")])\n \n (define_insn \"umul<mode>3_highpart\"\n- [(set (match_operand:VIlong 0 \"vsx_register_operand\" \"=v\")\n-\t(us_mult:VIlong (ashiftrt\n-\t\t\t (match_operand:VIlong 1 \"vsx_register_operand\" \"v\")\n-\t\t\t (const_int 32))\n-\t\t\t(ashiftrt\n-\t\t\t (match_operand:VIlong 2 \"vsx_register_operand\" \"v\")\n-\t\t\t (const_int 32))))]\n+ [(set (match_operand:VIlong 0 \"altivec_register_operand\" \"=v\")\n+ (unspec:VIlong [(match_operand:VIlong 1 \"altivec_register_operand\" \"v\")\n+ (match_operand:VIlong 2 \"altivec_register_operand\" \"v\")]\n+ UNSPEC_VMULHU))]\n \"TARGET_POWER10\"\n \"vmulhu<wd> %0,%1,%2\"\n [(set_attr \"type\" \"veccomplex\")])\n", "prefixes": [ "V2" ] }