From patchwork Wed Aug 30 01:58:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yujie X-Patchwork-Id: 1827545 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=server2.sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=patchwork.ozlabs.org) Received: from server2.sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Rb6sR2B9Mz1ygM for ; Wed, 30 Aug 2023 11:58:51 +1000 (AEST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 040903853547 for ; Wed, 30 Aug 2023 01:58:49 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 8674D3853D15 for ; Wed, 30 Aug 2023 01:58:32 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 8674D3853D15 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [192.168.100.1]) by gateway (Coremail) with SMTP id _____8AxuepGou5k6vQcAA--.49296S3; Wed, 30 Aug 2023 09:58:30 +0800 (CST) Received: from localhost.localdomain (unknown [192.168.100.1]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Bxicw5ou5knONmAA--.26621S5; Wed, 30 Aug 2023 09:58:30 +0800 (CST) From: Yang Yujie To: gcc-patches@gcc.gnu.org Subject: [PATCH v2 3/4] LoongArch: add new configure option --with-strict-align-lib Date: Wed, 30 Aug 2023 09:58:07 +0800 Message-ID: <20230830015808.19870-4-yangyujie@loongson.cn> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230830015808.19870-1-yangyujie@loongson.cn> References: <20230830015808.19870-1-yangyujie@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Bxicw5ou5knONmAA--.26621S5 X-CM-SenderInfo: 51dqw5pxmlvqxorr0wxvrqhubq/ X-Coremail-Antispam: 1Uk129KBj93XoW7ZrW3GryfZFW5XFWrXFWDAwc_yoW8CF48pa 4fX3Z8AFy8XFyrG3W2kayvgFnxWayxWF17ArWIk34qk34UK3W7tFyxtryakF13urWDJr13 ZrykK3WUJ345ZagCm3ZEXasCq-sJn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkFb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r126r13M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r126r1DMcIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07jjpB-UUUUU= X-Spam-Status: No, score=-11.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xuchenghua@loongson.cn, panchenghui@loongson.cn, chenglulu@loongson.cn Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" LoongArch processors may not support memory accesses without natural alignments. Building libraries with -mstrict-align may help with toolchain binary compatiblity and performance on these implementations (e.g. Loongson 2K1000LA). No significant performance degredation is observed on current mainstream LoongArch processors when the option is enabled. gcc/ChangeLog: * config.gcc: use -mstrict-align for building libraries if --with-strict-align-lib is given. --- gcc/config.gcc | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index 4fae672a3b7..ed70fa63268 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -4892,7 +4892,7 @@ case "${target}" in ;; loongarch*-*) - supported_defaults="abi arch tune fpu simd multilib-default" + supported_defaults="abi arch tune fpu simd multilib-default strict-align-lib" # Local variables unset \ @@ -5089,6 +5089,17 @@ case "${target}" in ;; esac + # Build libraries with -mstrict-align if --with-strict-align-lib is given. + case ${with_strict_align_lib} in + yes) strict_align_opt="/mstrict-align" ;; + ""|no) ;; + *) + echo "Unknown option: --with-strict-align-lib=${with_strict_align_lib}" 1>&2 + exit 1 + ;; + esac + + # Handle --with-multilib-default if echo "${with_multilib_default}" \ | grep -E -e '[[:space:]]' -e '//' -e '/$' -e '^/' > /dev/null 2>&1; then @@ -5250,6 +5261,9 @@ case "${target}" in ;; esac + # Use mstrict-align for building libraries if --with-strict-align-lib is given. + loongarch_multilib_list_make="${loongarch_multilib_list_make}${strict_align_opt}" + # Check for repeated configuration of the same multilib variant. if echo "${elem_abi_base}/${elem_abi_ext}" \ | grep -E "^(${all_abis%|})$" >/dev/null 2>&1; then