[{"id":3673437,"web_url":"http://patchwork.ozlabs.org/comment/3673437/","msgid":"<975fa49729c2920afe13d720385598dfb556b568.camel@gmail.com>","list_archive_url":null,"date":"2026-04-04T13:52:32","subject":"Re: [RFC PATCH v2] RX: enable LRA is default","submitter":{"id":88892,"url":"http://patchwork.ozlabs.org/api/people/88892/","name":"Oleg Endo","email":"olegendo1024@gmail.com"},"content":"Hi,\n\nOn Sat, 2026-04-04 at 22:39 +0900, Yoshinori Sato wrote:\n> Always enable LRA on RX targets.\n> Some Machine Descriptions did not work properly with LRA,\n> so their definitions have been changed.\n> \n> v1 -> v2\n> Fix WORD_REGISTER_OPERATIONS.\n> Cleanup shift operations.\n> \n> \t(adddi3): New. simplify implementation.\n> \t(subdi3): Likewise.\n> \t(addsi3_flags): adddi3 is not use. Remove it.\n> \t(adc_internal): Likewise.\n> \t(adc_flags): Likewise.\n> \t(adddi3_internal): Likewise.\n> \t(subsi3_flags): subsi3 not use. Remove it.\n> \t(sbb_internal): Likewise.\n> \t(*sbb_flags): Likewise.\n> \t(subdi3): Likewise.\n\nWhat's the issue with the addsi3_flags, adc_internal, sbb_internal,\nsbb_flags patterns?\n\nI see that you're using the shortcut to implement DImode add/sub as a fixed\n2-insn in the output asm. That is probably a practical and pragmatic fix on\nRX.\n\nHowever, if it was ever to implement something like __builtin_add_overflow\nor __builtin_addc, those patterns will have to be added back, I guess?\n\nPlease add a reference to PR/target 113948.\n\nOther than that, I'll give it a try on my software and see what it does.\nWill report back later.\n\nBest regards,\nOleg Endo","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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=Q9RLHYeg;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=Q9RLHYeg","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","sourceware.org; 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