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[87.1.10.169]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-57cb7438815sm530320a12.80.2024.06.13.00.05.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Jun 2024 00:05:34 -0700 (PDT) Date: Thu, 13 Jun 2024 09:05:30 +0200 From: Andrea Parri To: Patrick O'Neill Cc: gcc-patches@gcc.gnu.org, jeffreyalaw@gmail.com, kito.cheng@gmail.com, palmer@dabbelt.com, gnu-toolchain@rivosinc.com Subject: Re: [PATCH] RISC-V: Add support for subword atomic loads/stores Message-ID: References: <20240613001013.91104-1-patrick@rivosinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240613001013.91104-1-patrick@rivosinc.com> X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,KAM_SHORT,RCVD_IN_BARRACUDACENTRAL,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Wed, Jun 12, 2024 at 05:10:13PM -0700, Patrick O'Neill wrote: > Andrea Parri recently pointed out that we were emitting overly conservative > fences for seq_cst atomic loads/stores. This adds support for the optimized > fences specified in the PSABI: > https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/2092568f7896ceaa1ec0f02569b19eaa42cd51c9/riscv-atomic.adoc > > gcc/ChangeLog: > > * config/riscv/sync-rvwmo.md: Add support for subword fenced > loads/stores. > * config/riscv/sync-ztso.md: Ditto. > * config/riscv/sync.md: Ditto. > > gcc/testsuite/ChangeLog: > > * gcc.target/riscv/amo/amo-table-a-6-load-1.c: Increase test coverage to > include longs, shorts, chars, and bools. > * gcc.target/riscv/amo/amo-table-a-6-load-2.c: Ditto. > * gcc.target/riscv/amo/amo-table-a-6-load-3.c: Ditto. > * gcc.target/riscv/amo/amo-table-a-6-store-1.c: Ditto. > * gcc.target/riscv/amo/amo-table-a-6-store-2.c: Ditto. > * gcc.target/riscv/amo/amo-table-a-6-store-compat-3.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-load-1.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-load-2.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-load-3.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-store-1.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-store-2.c: Ditto. > * gcc.target/riscv/amo/amo-table-ztso-store-3.c: Ditto. > > Signed-off-by: Patrick O'Neill Tested-by: Andrea Parri Andrea