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Thu, 18 Jan 2024 14:36:46 -0800 (PST) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id t34-20020a056a0013a200b006da13bc46c0sm3904979pfg.171.2024.01.18.14.36.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Jan 2024 14:36:46 -0800 (PST) From: Charlie Jenkins Date: Thu, 18 Jan 2024 14:36:45 -0800 Subject: [PATCH v2] riscv: lib: Check if output in asm goto supported MIME-Version: 1.0 Message-Id: <20240118-csum_remove_output_operands_asm_goto-v2-1-5d1b73cf93d4@rivosinc.com> X-B4-Tracking: v=1; b=H4sIAPynqWUC/5XNQQ6DIBCF4asY1qURQmrtqvcwhihOdRYwhkHSx nj3Um/Q5f8W79sFQ0Rg8ah2ESEjI4US+lIJtwxhBolTaaFrbWql7tLx5m0ETxksbWndkqUV4hA mtgN7O1MiadpWa6eMctCIcrVGeOH7ZLq+9IKcKH5ONavf+ieQlVTSNO7W6HFsJzM+I2ZiDO7qy Iv+OI4vzXL07tsAAAA= To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Charlie Jenkins X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1705617405; l=1498; i=charlie@rivosinc.com; s=20231120; h=from:subject:message-id; bh=Ewf2ArCyVhqQECvgVJiy2phXnKTeR3STay2OCvwENw0=; b=8j8Lc3kU83hQIjeeCFyK7o9YgcEczbHdmRGsbhtSGH1IrtSy/F8ki8oeXrvzdncHyn2Ia3Ld9 x+nDNC7CGyfBtpWARLnVleMssPBiXVhl4azmSkd8VdXYfkkMD2pn8pt X-Developer-Key: i=charlie@rivosinc.com; a=ed25519; pk=t4RSWpMV1q5lf/NWIeR9z58bcje60/dbtxxmoSfBEcs= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240118_143650_277404_10ED7C80 X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The output field of an asm goto statement is not supported by all compilers. If it is not supported, fallback to the non-optimized code. Signed-off-by: Charlie Jenkins Fixes: a04c192eabfb ("riscv: Add checksum library") --- The OutputOperands field for asm goto statements is only supported starting from GCC 11. Split the asm goto to remove the use of this feature. --- Changes in v2: - Use CC_HAS_ASM_GOTO_TIED_OUTPUT - Link to v1: https://lore.kernel.org/r/20240118-csum_remove_output_operands_asm_goto-v1-1-47c672bb9d4b@rivosinc.com --- arch/riscv/lib/csum.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/riscv/lib/csum.c b/arch/riscv/lib/csum.c index 06ce8e7250d9..af3df5274ccb 100644 --- a/arch/riscv/lib/csum.c +++ b/arch/riscv/lib/csum.c @@ -156,6 +156,7 @@ do_csum_with_alignment(const unsigned char *buff, int len) end = (const unsigned long *)(buff + len); csum = do_csum_common(ptr, end, data); +#ifdef CC_HAS_ASM_GOTO_TIED_OUTPUT /* * Zbb support saves 6 instructions, so not worth checking without * alternatives if supported @@ -214,6 +215,7 @@ do_csum_with_alignment(const unsigned char *buff, int len) return csum >> 16; } no_zbb: +#endif /* CC_HAS_ASM_GOTO_TIED_OUTPUT */ #ifndef CONFIG_32BIT csum += ror64(csum, 32); csum >>= 32; --- base-commit: 080c4324fa5e81ff3780206a138223abfb57a68e change-id: 20240118-csum_remove_output_operands_asm_goto-49922c141ce7 -- - Charlie _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv