From patchwork Mon Jan 19 07:01:40 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yao Zihong X-Patchwork-Id: 128453 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from vm01.sourceware.org (localhost [127.0.0.1]) by sourceware.org (Postfix) with ESMTP id D2BCA4BA900E for ; Mon, 19 Jan 2026 07:02:47 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D2BCA4BA900E X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) by sourceware.org (Postfix) with ESMTPS id 7A6DB4BA9021 for ; Mon, 19 Jan 2026 07:02:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 7A6DB4BA9021 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=isrc.iscas.ac.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=isrc.iscas.ac.cn ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 7A6DB4BA9021 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1768806137; cv=none; b=xKHVLQegRsGQdM2Dom5s9tT1KtuqelBHx91w7TmCPSWBdgGGRU2U7fAnaphaOgfdl3+LuUwKnSgAoGazD+Bfci2nODQnrCyWp9f9YwsV7CLE4eukkhKTtPaHNC5yNKVKVNZfp7WdwNv0mZahSFokqvHE426Thu+3bGY2R4ZyFs0= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1768806137; c=relaxed/simple; bh=5gNVjccFZETHOa/fpZooE90ICKyGL5/EJDN7uBcAyqw=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=IFyT6hLabOVsonT+IF2jBaB0Mlt8HN08w8jYxRPfbjMP8RRyv9e0+D4DM5S2GMPzYubB4I/JEZVWikCHhi7huGGxXN3fUc6J30DRVoyWnQKxxiNdJBk3ihDuYYOobncRli8sAZ0/UXIxqXrb732o6VOphDAIlamJcUamfJHDU84= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7A6DB4BA9021 Received: from Mobilestation.localdomain (unknown [183.6.59.244]) by APP-05 (Coremail) with SMTP id zQCowADXaw_e1m1pkxWSBQ--.37054S3; Mon, 19 Jan 2026 15:02:08 +0800 (CST) From: Yao Zihong To: libc-alpha@sourceware.org Cc: adhemerval.zanella@linaro.org, andrew@sifive.com, schwab@linux-m68k.org, bergner@tenstorrent.com, jlaw@ventanamicro.com, zhangyin2018@iscas.ac.cn, zihongyao@outlook.com, Yao Zihong Subject: [PATCH v1 1/1] riscv: Nop out memcpy_noalignment if !IS_IN(libc) Date: Mon, 19 Jan 2026 15:01:40 +0800 Message-ID: <20260119070147.58560-2-zihong.plct@isrc.iscas.ac.cn> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20260119070147.58560-1-zihong.plct@isrc.iscas.ac.cn> References: <20260119070147.58560-1-zihong.plct@isrc.iscas.ac.cn> MIME-Version: 1.0 X-CM-TRANSID: zQCowADXaw_e1m1pkxWSBQ--.37054S3 X-Coremail-Antispam: 1UD129KBjvdXoWrtF15JFyUCFWfXFyxXr1rXrb_yoWDtrbEyr 4Ivwnru3yUAFWvyFnFqwsYkF1ayr4kKr18tFnrKr4UCrZxAr4kWan8Aw15Ar18uF4v9r43 Ja98CryrKFy2yjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbhAFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUGwA2048vs2IY02 0Ec7CjxVAFwI0_JFI_Gr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVWUJVWUCwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwA2z4 x0Y4vEx4A2jsIE14v26r1j6r4UM28EF7xvwVC2z280aVCY1x0267AKxVW8JVW8Jr1le2I2 62IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcV AFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG 0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_Jw0_GFyl42 xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWU GwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI4 8JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4U MIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I 8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfU5a0mUUUUU X-Originating-IP: [183.6.59.244] X-CM-SenderInfo: p2lk00vjoszunw6l223fol2u1dvotugofq/ X-Spam-Status: No, score=-10.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, RCVD_IN_DNSWL_BLOCKED, RCVD_IN_VALIDITY_RPBL_BLOCKED, RCVD_IN_VALIDITY_SAFE_BLOCKED, SPF_HELO_PASS, SPF_PASS, TXREP, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces~patchwork=sourceware.org@sourceware.org This patch nop out memcpy_noalignment if !IS_IN(libc) since ld.so can only use the generic implmentation. Signed-off-by: Yao Zihong --- sysdeps/riscv/multiarch/memcpy_noalignment.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sysdeps/riscv/multiarch/memcpy_noalignment.S b/sysdeps/riscv/multiarch/memcpy_noalignment.S index b912abe6d1..559e2b21e2 100644 --- a/sysdeps/riscv/multiarch/memcpy_noalignment.S +++ b/sysdeps/riscv/multiarch/memcpy_noalignment.S @@ -19,6 +19,7 @@ #include #include +#if IS_IN(libc) /* memcpy optimization for CPUs with fast unaligned support (RISCV_HWPROBE_MISALIGNED_FAST). @@ -31,7 +32,7 @@ The tail is handled with branchless copies. */ -#define BLOCK_SIZE (16 * SZREG) +# define BLOCK_SIZE (16 * SZREG) .attribute unaligned_access, 1 ENTRY (__memcpy_noalignment) @@ -156,3 +157,5 @@ L(word_copy_adjust): mv a3, a5 j L(word_copy) END (__memcpy_noalignment) + +#endif