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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id jc20-20020a17090325d400b001d403969b65sm4588056plb.187.2024.01.08.05.47.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jan 2024 05:47:46 -0800 (PST) From: Kito Cheng To: gcc-patches@gcc.gnu.org, kito.cheng@gmail.com, jim.wilson.gcc@gmail.com, palmer@dabbelt.com, andrew@sifive.com, jeffreyalaw@gmail.com, christoph.muellner@vrull.eu Subject: [PATCH 0/5] RISC-V: Relax the -march string for accept any order Date: Mon, 8 Jan 2024 21:47:33 +0800 Message-Id: <20240108134738.998804-1-kito.cheng@sifive.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE 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: , Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Do you know how to build a ISA string with following extension? - g - c - zba - zbs - svnapot - zve64d - zvl128b Don't trial and error with your gcc and don't read RISC-V ISA spec! OK, I believe it's impossible for most people, even I work for RISC-V so many years, I remember most of the rule of the the canonical order, it's still hard to order that right in short time... So I think it's time to relax that for the -march string inputs, since we have so many extension today, but we still keep the canonicalization within the compiler, because we need that to handle multi-lib and also it's easier to compare different ISA string. This patch break into serveral part: 1) Small refactor patch 2) Change the way of parsing ISA string. 3) Remove unused functions 4) Update test cases 5) Update document