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[209.51.188.17]) by mx.google.com with ESMTPS id k9-20020a0c9709000000b005ef676dbf8dsi1332220qvd.96.2023.08.31.13.32.56 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 31 Aug 2023 13:32:57 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=WWfOT1BG; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qboJa-000083-LC; Thu, 31 Aug 2023 16:30:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qboJH-0008WN-Sq for qemu-devel@nongnu.org; Thu, 31 Aug 2023 16:30:36 -0400 Received: from mail-ej1-x636.google.com ([2a00:1450:4864:20::636]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qboJF-0002c6-Nl for qemu-devel@nongnu.org; Thu, 31 Aug 2023 16:30:35 -0400 Received: by mail-ej1-x636.google.com with SMTP id a640c23a62f3a-9936b3d0286so158530166b.0 for ; Thu, 31 Aug 2023 13:30:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1693513832; x=1694118632; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4v4pNCupIU5kKxCqNO3QPDjJEZxzCp5Jcv4RC0vKsz8=; b=WWfOT1BGMHy2ij52RDMP32HeiW+za9rchDZoK1sYObGtr105B+d7RS5EL9GHTDkXX/ hKhYqiYPUrtc/d+3UTKefHch4/voZi3s3mbhS85mvudf06ojVlPmJbG7mbQAcCe117Vt dKh+bM520SAvkcZz14Y3UC/PD57FaSDBwBCe/D2p4m0aF3GcDKA9NjG1wSRYQIFAhnT5 qU/U7ewkF+4JMZFOQfMPLVLw9uEZjJKOax6LSM9rX/WXAa9/Vg4Gv+udIngzJ5eJKMEG h/Auf5TRtVoPNcB6q77Lh7O3my4o5kBY2CrMf3mtomZ8wwyjnRFo2YPskvuCqnlqjs+H 6C6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693513832; x=1694118632; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4v4pNCupIU5kKxCqNO3QPDjJEZxzCp5Jcv4RC0vKsz8=; b=OYqhNFufFH4myYKiHuj/ugFessl3wGt9D/76OoqIMW6uTwVtdPcotL+N6zHMrIZfeL QUq8Flx1QsNKy5r6Go2DC2R6pH+SGD0bqFY4jE1fe1HPh9yIvSU9ZMXSPCOOemia4pyg 8W+wYY3HXnb0NMoyTrkkY8q7rZnjX8gYYj1JyBfHfiuhSVmrM9NJr/vYZdbgO28cejMg WZj1oRQw+oBWAqHSZrH4m3nQGYwQsJyFnktbZnd5+8Ki468Bz6KF96WpUYJ14oRDAY91 RHm+HQVMKxns6/ud7irt60rS831fKWkKYFZiuGt219csf/BiM2MusQ4kMQrmbFfUJjN1 fUgg== X-Gm-Message-State: AOJu0YzJPz7zqaY4rVfOtvgnWK9TgWjV5aPm6rygO1LeromEgS7Ousrq YkgkQAAuKNQLdYCmUHfArq1QPWp7adp/1xajQjo= X-Received: by 2002:a17:907:6087:b0:9a1:db97:62a1 with SMTP id ht7-20020a170907608700b009a1db9762a1mr296331ejc.46.1693513832176; Thu, 31 Aug 2023 13:30:32 -0700 (PDT) Received: from m1x-phil.lan ([176.187.199.245]) by smtp.gmail.com with ESMTPSA id z15-20020a17090655cf00b0098dfec235ccsm1131941ejp.47.2023.08.31.13.30.31 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 31 Aug 2023 13:30:31 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Jiaxun Yang , Aurelien Jarno , Aleksandar Rikalo , Richard Henderson Subject: [PATCH v2 1/7] target/mips: Simplify Loongson MULTU.G opcode Date: Thu, 31 Aug 2023 22:30:17 +0200 Message-ID: <20230831203024.87300-2-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230831203024.87300-1-philmd@linaro.org> References: <20230831203024.87300-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::636; envelope-from=philmd@linaro.org; helo=mail-ej1-x636.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Since MULTU opcodes don't record the most significant bits of the infinite result, sign-extending the sources make no difference in the result. Once we remove the sign extension of source registers, MULT and MULTU are identical (as are DMULT and DMULTU). Suggested-by: Richard Henderson Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson --- target/mips/tcg/translate.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c index 9bb40f1849..e0a76b9432 100644 --- a/target/mips/tcg/translate.c +++ b/target/mips/tcg/translate.c @@ -3625,8 +3625,6 @@ static void gen_loongson_integer(DisasContext *ctx, uint32_t opc, break; case OPC_MULTU_G_2E: case OPC_MULTU_G_2F: - tcg_gen_ext32u_tl(t0, t0); - tcg_gen_ext32u_tl(t1, t1); tcg_gen_mul_tl(cpu_gpr[rd], t0, t1); tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]); break;