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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B05FFC433EF for ; Tue, 26 Oct 2021 23:51:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 30458600CC for ; Tue, 26 Oct 2021 23:51:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 30458600CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:59956 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mfWEY-0006s0-9V for qemu-devel@archiver.kernel.org; Tue, 26 Oct 2021 19:51:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53980) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mfVdO-0000Cj-AZ for qemu-devel@nongnu.org; Tue, 26 Oct 2021 19:13:34 -0400 Received: from mail-pg1-x536.google.com ([2607:f8b0:4864:20::536]:34717) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mfVdL-00037d-GA for qemu-devel@nongnu.org; Tue, 26 Oct 2021 19:13:34 -0400 Received: by mail-pg1-x536.google.com with SMTP id h193so1064529pgc.1 for ; Tue, 26 Oct 2021 16:13:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=a4njDfQC9JoQ4EGmKy2OjsF/31HmyACHskOdXQZvxJE=; b=nubpKN6GG6qvhWGG3WFKDD/OwCP+Eg7vNKX4Tu7dm111qVz/z5oc3NxFC6mCpBl/MA stRWiUHON5At7noRC4UHaLcfzd5nuEa9Ol9YfR1ydvLL+y1UpCTZm2zI3wXhyr0D48+3 +fHLMX5XuKejBdfk0rFo4E1N+78AgfdMRxz+BaoU39Mvc9h/y3dRuEkZDB0NW4P5v436 ALHJMesWztNjfDrz6nXrRiaLdnZJ6Z0GUXvKj8VUPi3+mDQNNu8Yd6GUJmZJBHch4Rg5 jz9kTGikwMmueVrYJnShkQobBUkVvI3izz2nSeZLHRJRgNRtFrjnsQNnk5TV3tz6CYvv Fd0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=a4njDfQC9JoQ4EGmKy2OjsF/31HmyACHskOdXQZvxJE=; b=qVRLj6e/T9LaX5g3teN0KOQq5tjpJmuGvCQoSoFC/Ee06lmmJsVZ0mwtVJirUo8ns4 T6sOzRYtP85Ono4WgugRUCzDa6rpF4Gd+sNP8iLZ6x6TBoUHBM4LnFCokDHvRmO4zO1G He99w/Eo6RTz1dl831KM+2dH3f3DPY1ghDJwhUmiemHtwisViX+UZJjvSWJHkwuv62Rb TW4Jm3T8HqlSKASyWNqOR6ZOwfV59NmJq4b0n1hbyR3TuzNKjANBaY96Dm+CJ4xFXMXd Jb8LNkusHUHPOrjgfVNu7ysSiO6/atrEvtgIY+LeoCIhUiLtFsMXLxQYoaCWfRtyA2hA XZVA== X-Gm-Message-State: AOAM532Zec6KCUdd6ZbHeDlweToB2AdzbX1TWkkvwbGy6Bhn8/TM+KtB X4t337qJNmuljZsoDnMW0BXQZKNqvwiSIw== X-Google-Smtp-Source: ABdhPJwW2KNs45FwDGwXuxx0w0oM7z8c1tviKQa8wa1IkZrZRuJEDuq9S0vW1h3xrtX5phagj6jpRg== X-Received: by 2002:a63:7b5c:: with SMTP id k28mr18495615pgn.158.1635290010118; Tue, 26 Oct 2021 16:13:30 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id d6sm24158122pfa.39.2021.10.26.16.13.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Oct 2021 16:13:29 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v4 48/51] tcg/optimize: Propagate sign info for logical operations Date: Tue, 26 Oct 2021 16:09:40 -0700 Message-Id: <20211026230943.1225890-49-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211026230943.1225890-1-richard.henderson@linaro.org> References: <20211026230943.1225890-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::536; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x536.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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: luis.pires@eldorado.org.br, alex.bennee@linaro.org, f4bug@amsat.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Sign repetitions are perforce all identical, whether they are 1 or 0. Bitwise operations preserve the relative quantity of the repetitions. Reviewed-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- tcg/optimize.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/tcg/optimize.c b/tcg/optimize.c index 742417ca1e..311d9779f2 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -966,6 +966,13 @@ static bool fold_and(OptContext *ctx, TCGOp *op) z2 = arg_info(op->args[2])->z_mask; ctx->z_mask = z1 & z2; + /* + * Sign repetitions are perforce all identical, whether they are 1 or 0. + * Bitwise operations preserve the relative quantity of the repetitions. + */ + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; + /* * Known-zeros does not imply known-ones. Therefore unless * arg2 is constant, we can't infer affected bits from it. @@ -1001,6 +1008,8 @@ static bool fold_andc(OptContext *ctx, TCGOp *op) } ctx->z_mask = z1; + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return fold_masks(ctx, op); } @@ -1299,6 +1308,9 @@ static bool fold_eqv(OptContext *ctx, TCGOp *op) fold_xi_to_not(ctx, op, 0)) { return true; } + + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return false; } @@ -1486,6 +1498,8 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op) ctx->z_mask = arg_info(op->args[3])->z_mask | arg_info(op->args[4])->z_mask; + ctx->s_mask = arg_info(op->args[3])->s_mask + & arg_info(op->args[4])->s_mask; if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) { uint64_t tv = arg_info(op->args[3])->val; @@ -1584,6 +1598,9 @@ static bool fold_nand(OptContext *ctx, TCGOp *op) fold_xi_to_not(ctx, op, -1)) { return true; } + + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return false; } @@ -1613,6 +1630,9 @@ static bool fold_nor(OptContext *ctx, TCGOp *op) fold_xi_to_not(ctx, op, 0)) { return true; } + + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return false; } @@ -1622,6 +1642,8 @@ static bool fold_not(OptContext *ctx, TCGOp *op) return true; } + ctx->s_mask = arg_info(op->args[1])->s_mask; + /* Because of fold_to_not, we want to always return true, via finish. */ finish_folding(ctx, op); return true; @@ -1637,6 +1659,8 @@ static bool fold_or(OptContext *ctx, TCGOp *op) ctx->z_mask = arg_info(op->args[1])->z_mask | arg_info(op->args[2])->z_mask; + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return fold_masks(ctx, op); } @@ -1648,6 +1672,9 @@ static bool fold_orc(OptContext *ctx, TCGOp *op) fold_ix_to_not(ctx, op, 0)) { return true; } + + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return false; } @@ -1921,6 +1948,8 @@ static bool fold_xor(OptContext *ctx, TCGOp *op) ctx->z_mask = arg_info(op->args[1])->z_mask | arg_info(op->args[2])->z_mask; + ctx->s_mask = arg_info(op->args[1])->s_mask + & arg_info(op->args[2])->s_mask; return fold_masks(ctx, op); } -- 2.25.1