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helo=nebula.arm.com; pr=C" ], "From": "Muhammad Kamran <muhammad.kamran@arm.com>", "To": "<gcc-patches@gcc.gnu.org>", "CC": "Richard Earnshaw <richard.earnshaw@arm.com>, Tamar Christina\n <tamar.christina@arm.com>, Kyrylo Tkachov <ktkachov@nvidia.com>, \"Alice\n Carlotti\" <alice.carlotti@arm.com>, Alex Coplan <alex.coplan@arm.com>,\n \"Andrew Pinski\" <andrew.pinski@oss.qualcomm.com>, Wilco Dijkstra\n <wilco.dijkstra@arm.com>, Muhammad Kamran <muhammad.kamran@arm.com>", "Subject": "[PATCH v4 0/3] aarch64: Implement uaddc/usubc expansion and\n carry/borrow round-trip cleanup", "Date": "Fri, 10 Apr 2026 15:05:50 +0000", "Message-ID": "<20260410150553.156795-1-muhammad.kamran@arm.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-EOPAttributedMessage": "1", "X-MS-TrafficTypeDiagnostic": "\n AM4PEPF00027A6B:EE_|GVXPR08MB11153:EE_|AMS1EPF0000004B:EE_|DB9PR08MB9441:EE_", "X-MS-Office365-Filtering-Correlation-Id": "7a4e3138-2d2a-465c-93b0-08de9712d789", "x-checkrecipientrouted": "true", "NoDisclaimer": "true", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam-Untrusted": "BCL:0;\n ARA:13230040|82310400026|376014|36860700016|1800799024|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info-Original": "\n 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", "X-Forefront-Antispam-Report-Untrusted": "CIP:172.205.89.229; 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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n AMS1EPF0000004B.eurprd04.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "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 is v4 of the patch series addressing the comments from V1 here:\nhttps://inbox.sourceware.org/gcc-patches/20260312095440.4097-1-muhammad.kamran@arm.com/#R\n\nIt also fixes the changelog typos in V2 from here:\nhttps://inbox.sourceware.org/gcc-patches/20260319140723.9392-1-muhammad.kamran@arm.com/#R\n\nv3 can be found here:\nhttps://inbox.sourceware.org/gcc-patches/20260319162815.62448-1-muhammad.kamran@arm.com/\n\nThe patch series adds uaddc<m>5 and usubc<m>5 expansion patterns.\n\nIt also adds post combine no-op split patterns for chained carry operations by\ndeleting the rewrite to C flag.\n\nThe uaddc<mode>5 triggered a bug in add<mode>3_carryinC when the mode is SImode.\nThe first patch fixes it.\n\nPR target/122525\n\nChanges since V3:\n- Improve the insn_and_split pattern for uaddc carry chain.\n\nChanges since v2:\n- Fix changelogs\n - Fix a typo in changelogs.\n - Move PR target/122525 inside changelogs.\n\nChanges since v1:\n- Address comments from Andrew:\n - Add PR target/122525 reference.\n- Address comments from Richard:\n - Add comments to operands of uaddc/usubc optab expansion pattern.\n - Change operand 3 to nonmemory_operand with optimal expansion.\n - Handle non-zero constant carry-in/borrow-in.\n - Fix changelogs.\n - Add tests for __builtin_addc() and __builtin_addcl().\n - Add test cases with constant y.\n\nRegression tested on aarch64-linux-gnu with no regressions.\n\nMuhammad Kamran (3):\n aarch64: Fix crash in add<mode>3_carryinC due to wide_int precision\n mismatch\n aarch64: add uaddc<m>5 expansion pattern to machine description\n aarch64: add usubc<m>5 expansion pattern to machine description\n\n gcc/config/aarch64/aarch64.md | 171 +++++++++++++++++-\n .../aarch64/uaddc-builtin-add-overflow.c | 28 +++\n .../gcc.target/aarch64/uaddc-builtin-addc.c | 17 ++\n .../gcc.target/aarch64/uaddc-builtin-addcl.c | 17 ++\n .../gcc.target/aarch64/uaddc-const-minus1.c | 14 ++\n .../gcc.target/aarch64/uaddc-const-plus1.c | 12 ++\n .../aarch64/usubc-builtin-sub-overflow.c | 28 +++\n .../gcc.target/aarch64/usubc-builtin-subc.c | 17 ++\n .../gcc.target/aarch64/usubc-builtin-subcl.c | 17 ++\n .../gcc.target/aarch64/usubc-const-minus1.c | 14 ++\n .../gcc.target/aarch64/usubc-const-plus1.c | 12 ++\n 11 files changed, 346 insertions(+), 1 deletion(-)\n create mode 100644 gcc/testsuite/gcc.target/aarch64/uaddc-builtin-add-overflow.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/uaddc-builtin-addc.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/uaddc-builtin-addcl.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/uaddc-const-minus1.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/uaddc-const-plus1.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/usubc-builtin-sub-overflow.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/usubc-builtin-subc.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/usubc-builtin-subcl.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/usubc-const-minus1.c\n create mode 100644 gcc/testsuite/gcc.target/aarch64/usubc-const-plus1.c" }