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GET /api/patches/2232090/?format=api
{ "id": 2232090, "url": "http://patchwork.ozlabs.org/api/patches/2232090/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260502145124.3763322-1-xry111@xry111.site/", "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": "<20260502145124.3763322-1-xry111@xry111.site>", "list_archive_url": null, "date": "2026-05-02T14:51:10", "name": "LoongArch: add spaceship expanders", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "d99bac77db5c901691d06d9bf054bdcab03fd8eb", "submitter": { "id": 84026, "url": "http://patchwork.ozlabs.org/api/people/84026/?format=api", "name": "Xi Ruoyao", "email": "xry111@xry111.site" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260502145124.3763322-1-xry111@xry111.site/mbox/", "series": [ { "id": 502537, "url": "http://patchwork.ozlabs.org/api/series/502537/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=502537", "date": "2026-05-02T14:51:10", "name": "LoongArch: add spaceship expanders", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502537/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2232090/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2232090/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 (1024-bit key;\n unprotected) header.d=xry111.site header.i=@xry111.site header.a=rsa-sha256\n header.s=default header.b=mveL219s;\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; 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 (1024-bit key,\n unprotected) header.d=xry111.site header.i=@xry111.site header.a=rsa-sha256\n header.s=default header.b=mveL219s", "sourceware.org;\n dmarc=pass (p=reject dis=none) header.from=xry111.site", "sourceware.org; spf=pass smtp.mailfrom=xry111.site", "server2.sourceware.org;\n arc=none smtp.remote-ip=89.208.246.23" ], "Received": [ "from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g79r52RZnz1yJ0\n\tfor <incoming@patchwork.ozlabs.org>; Sun, 03 May 2026 00:52:51 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id E6D004BB3BB9\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 2 May 2026 14:52:49 +0000 (GMT)", "from xry111.site (xry111.site [89.208.246.23])\n by sourceware.org (Postfix) with ESMTPS id 73C3F4A9A8AD\n for <gcc-patches@gcc.gnu.org>; Sat, 2 May 2026 14:52:18 +0000 (GMT)", "from stargazer (unknown\n [IPv6:2409:8a4c:e1c:abf0:bb72:8d18:d3cb:9175])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n (Client did not present a certificate)\n (Authenticated sender: xry111@xry111.site)\n by xry111.site (Postfix) with ESMTPSA id 8FB0565992;\n Sat, 2 May 2026 10:51:45 -0400 (EDT)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org E6D004BB3BB9", "OpenDKIM Filter v2.11.0 sourceware.org 73C3F4A9A8AD" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 73C3F4A9A8AD", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 73C3F4A9A8AD", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1777733538; cv=none;\n b=KPcz7T6LcCm1hJG0QqQAQYTTj13HB+uPe/LCo6YvpxLz9STvt6vDGmUReeNCHoJ9u/D/Xm0LwEOL3nDV2rGZHMa5bQCIeVDKQpQ0BMPtXGsrtNbaEQ3TaUJNvO7MP32r3cNQ5/hMxoc2h4SGKmh+OTAuOi7/uR9v+c5pzHWE0vc=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1777733538; c=relaxed/simple;\n bh=AFVj3v5tZy57Rbuh18Ja7CjsvsgANIZyYApcJ+nvbPw=;\n h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version;\n b=WLNfAH998T6+VH9589gn83tAwrXs9IGEH/QeZ41cYtcNZgZCP8+G3ERZv425GeuqOosr8T18r188RgA4yPPNM6YNFzD9LToP0rPF5R/4AKo3gV2i88xJotq8sZwMlzo5xvT0b4TrjOHQCc+6ar/1ettn2upKSFbaX8A7J6/D9cc=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=xry111.site;\n s=default; t=1777733507;\n bh=DDO5iQRQAWbaxEyi1Czk82KvfxYMnLhSFXdSU+hKrhg=;\n h=From:To:Cc:Subject:Date:From;\n b=mveL219sxlVK3AgX7sFIAsCyP31CQn+HwAUhioXH6bEl6OTwJsJjINXoTrvrARsoo\n dvLIcGD82w3UVIf4C3qR9UZrOCakn0DNj7ASXF33rs0Cn/7dRbGQ04/gHmxn3gGrat\n fv1IyJT8UoCQCbo/TsBuKWll3A5g8dLqwqmA2AjU=", "From": "Xi Ruoyao <xry111@xry111.site>", "To": "gcc-patches@gcc.gnu.org", "Cc": "Lulu Cheng <chenglulu@loongson.cn>, WANG Xuerui <i@xen0n.name>,\n Mingcong Bai <jeffbai@aosc.io>, Zixing Liu <liushuyu@aosc.io>,\n Xi Ruoyao <xry111@xry111.site>", "Subject": "[PATCH] LoongArch: add spaceship expanders", "Date": "Sat, 2 May 2026 22:51:10 +0800", "Message-ID": "<20260502145124.3763322-1-xry111@xry111.site>", "X-Mailer": "git-send-email 2.54.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "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": "This helps to optimize certain nested ternary operation producing -1, 0,\nor 1 to slt[u]-slt[u]-sub.\n\ngcc/\n\n\t* config/loongarch/loongarch.md (spaceship<mode>4): New\n\tdefine_expand.\n\ngcc/testsuite/\n\n\t* gcc.target/loongarch/la64/spaceship.c: New test.\n---\n\nBootstrapped and regtested on loongarch64-linux-gnu. Ok for trunk?\n\n gcc/config/loongarch/loongarch.md | 41 ++++++++++\n .../gcc.target/loongarch/la64/spaceship.c | 79 +++++++++++++++++++\n 2 files changed, 120 insertions(+)\n create mode 100644 gcc/testsuite/gcc.target/loongarch/la64/spaceship.c", "diff": "diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md\nindex f8693b7f593..1732e7c7d32 100644\n--- a/gcc/config/loongarch/loongarch.md\n+++ b/gcc/config/loongarch/loongarch.md\n@@ -3798,6 +3798,47 @@ (define_insn \"*sle<u>_<X:mode><GPR:mode>\"\n [(set_attr \"type\" \"slt\")\n (set_attr \"mode\" \"<X:MODE>\")])\n \n+(define_expand \"spaceship<mode>4\"\n+ [(match_operand:SI 0 \"register_operand\")\n+ (match_operand:QHWD 1 \"register_operand\")\n+ (match_operand:QHWD 2 \"reg_or_0_operand\")\n+ (match_operand:SI 3 \"const_int_operand\")]\n+ \"\"\n+{\n+ gcc_assert (operands[3] == const1_rtx || operands[3] == constm1_rtx);\n+\n+ if (GET_MODE_SIZE (<MODE>mode) < GET_MODE_SIZE (word_mode))\n+ {\n+ auto extend = (operands[3] == const1_rtx ? ZERO_EXTEND\n+\t\t\t\t\t : SIGN_EXTEND);\n+ for (int i: {1, 2})\n+\tif (operands[i] != const0_rtx)\n+\t operands[i] = force_reg (word_mode,\n+\t\t\t\t gen_rtx_fmt_e (extend, word_mode,\n+\t\t\t\t\t\t operands[i]));\n+ }\n+\n+ auto lt_code = (operands[3] == const1_rtx ? LTU : LT);\n+ auto gt_code = (operands[3] == const1_rtx ? GTU : GT);\n+ rtx lt = gen_rtx_fmt_ee (lt_code, word_mode, operands[1], operands[2]);\n+ rtx gt = gen_rtx_fmt_ee (gt_code, word_mode, operands[1], operands[2]);\n+\n+ gt = force_reg (word_mode, gt);\n+ lt = force_reg (word_mode, lt);\n+\n+ rtx diff = gen_rtx_MINUS (word_mode, gt, lt);\n+ if (TARGET_64BIT)\n+ {\n+ diff = force_reg (DImode, diff);\n+ diff = gen_lowpart (SImode, diff);\n+ SUBREG_PROMOTED_VAR_P (diff) = 1;\n+ SUBREG_PROMOTED_SET (diff, SRP_SIGNED_AND_UNSIGNED);\n+ }\n+\n+ emit_move_insn (operands[0], diff);\n+ DONE;\n+})\n+\n \f\n ;;\n ;; ....................\ndiff --git a/gcc/testsuite/gcc.target/loongarch/la64/spaceship.c b/gcc/testsuite/gcc.target/loongarch/la64/spaceship.c\nnew file mode 100644\nindex 00000000000..0c2f891b58a\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/loongarch/la64/spaceship.c\n@@ -0,0 +1,79 @@\n+/* { dg-options \"-O2\" } */\n+/* { dg-final { check-function-bodies \"**\" \"\" } } */\n+\n+#define TEST(T) \\\n+ int test_##T(T a, T b) \\\n+ { return (a == b) ? 0 : (a < b) ? -1 : 1; } \\\n+ int test_u##T(unsigned T a, unsigned T b) \\\n+ { return (a == b) ? 0 : (a < b) ? -1 : 1; }\n+\n+TEST(char)\n+TEST(short)\n+TEST(int)\n+TEST(long)\n+\n+/*\n+** test_char:\n+**\tslt\t.*\n+**\tslt\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_uchar:\n+**\tsltu\t.*\n+**\tsltu\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_short:\n+**\tslt\t.*\n+**\tslt\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_ushort:\n+**\tsltu\t.*\n+**\tsltu\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_int:\n+**\tslt\t.*\n+**\tslt\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_uint:\n+**\tbstrpick\\.d\t.*,31,0\n+**\tbstrpick\\.d\t.*,31,0\n+**\tsltu\t.*\n+**\tsltu\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_long:\n+**\tslt\t.*\n+**\tslt\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n+\n+/*\n+** test_ulong:\n+**\tsltu\t.*\n+**\tsltu\t.*\n+**\tsub\\.d\t.*\n+**\tjr\t\\$r1\n+*/\n", "prefixes": [] }