{"id":2219445,"url":"http://patchwork.ozlabs.org/api/patches/2219445/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/d99ecf9b-519f-4ba1-9a94-d20e2cff9c3e@yahoo.co.jp/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/projects/17/?format=json","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":"","list_archive_url":null,"date":"2026-04-03T01:58:09","name":"[1/2] xtensa: Small change to the alternative negsf2 pattern","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"76f8b379a88119b2cbbc04a2a2eb966ec3342867","submitter":{"id":83997,"url":"http://patchwork.ozlabs.org/api/people/83997/?format=json","name":"Takayuki 'January June' Suwa","email":"jjsuwa_sys3175@yahoo.co.jp"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/d99ecf9b-519f-4ba1-9a94-d20e2cff9c3e@yahoo.co.jp/mbox/","series":[{"id":498578,"url":"http://patchwork.ozlabs.org/api/series/498578/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=498578","date":"2026-04-03T02:00:32","name":"[1/2] xtensa: Small change to the alternative negsf2 pattern","version":1,"mbox":"http://patchwork.ozlabs.org/series/498578/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2219445/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2219445/checks/","tags":{},"related":[],"headers":{"Return-Path":"","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=yahoo.co.jp header.i=@yahoo.co.jp header.a=rsa-sha256\n header.s=yahoocojp-202506 header.b=dMRU7Fkj;\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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a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1775181489;\n s=yahoocojp-202506; d=yahoo.co.jp;\n h=References:Content-Transfer-Encoding:Content-Type:Subject:From:Cc:To:MIME-Version:Date:Message-ID;\n bh=SqYhfiJyF8xYU6kIyufvzuMq5AW30atSEBGLoQxpFgk=;\n b=dMRU7Fkj8I/0UIWeCK5jKm15eec130K1GNAibS6NhTmWtya8+8cBAY9riBqBrX58\n 0RNsrC3GnjuDKrZsVXlxbC2HXGY2rDElsTulOEe+R3WbWCpMB8sgiVsH/qR8Ypu9luP\n Pcsvxg/mAHWXPuaZaGMjmgJRQ7Ava/crzpv2fjJyqnvMLKusPAcO8iJE6tVdAtTN31y\n 6naen5etFs0g5S0Q6jH6FLPzQRFtsNLUm6tArJJVB21ymLiaxCaDRJcNCRhIbQbP8g1\n 2zYlY3tHA8DdaciObszjDIfP55VbL3dg3YmfbaOo5x4+z/w+oaENjOalM8Ev5NFSlFV\n N96usYPxMA==","Message-ID":"","Date":"Fri, 3 Apr 2026 10:58:09 +0900","MIME-Version":"1.0","User-Agent":"Mozilla Thunderbird","Content-Language":"en-US","To":"gcc-patches@gcc.gnu.org","Cc":"Max Filippov ","From":"Takayuki 'January June' Suwa ","Subject":"[PATCH 1/2] xtensa: Small change to the alternative negsf2 pattern","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","References":"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"The previously added alternative negsf2 pattern (for cases where both\nsource and destination are GP registers) directly specified multiple\nmachine instructions in the output template, but this patch replaces\nthat with an RTL representation using the split pattern, to increase\nopportunities for instruction reordering.\n\ngcc/ChangeLog:\n\n\t* config/xtensa/xtensa.md (negsf2):\n\tChange define_insn to define_insn_and_split, and replace the\n\tcorresponding output template with the split pattern.\n---\n gcc/config/xtensa/xtensa.md | 14 ++++++++++++--\n 1 file changed, 12 insertions(+), 2 deletions(-)","diff":"diff --git a/gcc/config/xtensa/xtensa.md b/gcc/config/xtensa/xtensa.md\nindex 6916adefc8b..a96ea6feb60 100644\n--- a/gcc/config/xtensa/xtensa.md\n+++ b/gcc/config/xtensa/xtensa.md\n@@ -693,15 +693,25 @@\n DONE;\n })\n \n-(define_insn \"negsf2\"\n+(define_insn_and_split \"negsf2\"\n [(set (match_operand:SF 0 \"register_operand\")\n (neg:SF (match_operand:SF 1 \"register_operand\")))\n (clobber (match_scratch:SI 2))]\n \"TARGET_HARD_FLOAT\"\n {@ [cons: =0, 1, =2; attrs: type, length]\n- [D, D, &a; arith , 7] movi.n\\t%2, 1\\;slli\\t%2, %2, 31\\;add.n\\t%0, %1, %2\n+ [D, D, &a; arith , 7] #\n [f, f, X; farith, 3] neg.s\\t%0, %1\n }\n+ \"&& reload_completed && REG_P (operands[2])\"\n+ [(set (match_dup 2)\n+\t(const_int 1))\n+ (set (match_dup 2)\n+\t(ashift:SI (match_dup 2)\n+\t\t (const_int 31)))\n+ (set (subreg:SI (match_dup 0) 0)\n+\t(plus:SI (subreg:SI (match_dup 1) 0)\n+\t\t (match_dup 2)))]\n+ \"\"\n [(set_attr \"mode\" \"SF\")])\n \n \f\n","prefixes":["1/2"]}