From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECE70C433E0 for ; Wed, 8 Jul 2020 05:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CD1C42078B for ; Wed, 8 Jul 2020 05:44:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729119AbgGHFoG (ORCPT ); Wed, 8 Jul 2020 01:44:06 -0400 Received: from out28-4.mail.aliyun.com ([115.124.28.4]:52971 "EHLO out28-4.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725848AbgGHFoG (ORCPT ); Wed, 8 Jul 2020 01:44:06 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.577819|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_system_inform|0.0144316-0.00272735-0.982841;FP=0|0|0|0|0|-1|-1|-1;HT=e02c03294;MF=maochenxi@eswin.com;NM=1;PH=DS;RN=7;RT=7;SR=0;TI=SMTPD_---.I-3Y8gn_1594187037; Received: from localhost.localdomain(mailfrom:maochenxi@eswin.com fp:SMTPD_---.I-3Y8gn_1594187037) by smtp.aliyun-inc.com(10.194.97.171); Wed, 08 Jul 2020 13:44:01 +0800 From: Chenxi Mao To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, chenxi.mao2013@gmail.com, Chenxi Mao Subject: [PATCH 1/1] riscv: Enable compiler optimizations Date: Wed, 8 Jul 2020 13:43:54 +0800 Message-Id: <20200708054354.25283-1-maochenxi@eswin.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Enable ARCH_HAS_FAST_MULTIPLIER and ARCH_SUPPORTS_INT128 for better code generation. These 2 configurations works fine on GCC-9.3 and GCC-10.1 Signed-off-by: Chenxi Mao --- arch/riscv/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 128192e14ff2..f21b7e5188ca 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -26,6 +26,8 @@ config RISCV select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_HUGE_PMD_SHARE if 64BIT + select ARCH_HAS_FAST_MULTIPLIER + select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG select CLONE_BACKWARDS select COMMON_CLK select EDAC_SUPPORT -- 2.25.1