From patchwork Thu Oct 21 21:05:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 516112 Delivered-To: patch@linaro.org Received: by 2002:ac0:bf50:0:0:0:0:0 with SMTP id o16csp354781imj; Thu, 21 Oct 2021 14:44:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzgaGDfkDn8PyowUoCu8ZY9oaPEbceGGhOusrJYyIJCuNn4X5gQ88NQvpN25WiiMoFLEbBJ X-Received: by 2002:a05:6830:147:: with SMTP id j7mr6723279otp.67.1634852680056; Thu, 21 Oct 2021 14:44:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634852680; cv=none; d=google.com; s=arc-20160816; b=LibfuZbLoWBPrwpOJe6WS7FWhtiOeSxKfd4VrD5GzHTbcP4CQCY3B/x1+CJuW1vveD W8q0n9uEhexPrWVrGWurR99AEX0sisTs6KsprSHQO7HacCyP1jxAUxWV5hiopEkI5noa V3i7dnLLmj6IfvIzQDlDDp9t1eH4VkHfYTHBBPt9l0NnFYt/BuOKcBMXVrJAGjVk617Y pR3rerSdTYeh1UJd1q5fHVrWFW+xoLYazuuqd1BnvaRfvPOa64cnePNDZSYrcyzq+8zw FZ5hgChhW9XQE1qPzT7blktNazu15YaILJgJMXH7aS0OCqkhdhHxE1eXYR4pWI0bW4nK Z5YA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:to:from :dkim-signature; bh=5G0K+H2e7otmmKQ9zQj4DbcKrZpcr7GS6k3OOPhe8m0=; b=b1HUt1y8rlKoyWDepUzGsmfikIu52bxf1sm7sdSSyDuGUmSYFr3QAoJWvcdy17TdL2 nAN9H06Nljm29idc/tjO8/W0QwlkFK5sJVVPHc8GYeI6VIc4NzSfbfYB8YJZLZqCkJZM 2a+RkOZg3SzkC4Xamzy9gfBF3OT29XGbEtFnbA5AUl9e/bnX03OM2V3fqdQNzzSxqjM/ ujJqPS9J6dEVBoQWoeRnANzoeN1O57LMUVjxSriWNy1CQY6yOpo5vww4gJdJPzvEpXeW loBLXyzR5GynOJqIJkJoWdh/CsSg4tg7mKCJ1YkgPWUmvOV1gJQXr5SrWFYkqqTSEOVp q8ZQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@linaro.org header.s=google header.b=vCm+AY8X; 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=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id w5si7670169otu.77.2021.10.21.14.44.40 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Oct 2021 14:44:40 -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=fail header.i=@linaro.org header.s=google header.b=vCm+AY8X; 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=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1]:55366 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mdfrb-0004tC-Dx for patch@linaro.org; Thu, 21 Oct 2021 17:44:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49314) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mdfJR-00045P-4V for qemu-devel@nongnu.org; Thu, 21 Oct 2021 17:09:24 -0400 Received: from mail-pf1-x435.google.com ([2607:f8b0:4864:20::435]:41916) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mdfJO-00009f-33 for qemu-devel@nongnu.org; Thu, 21 Oct 2021 17:09:20 -0400 Received: by mail-pf1-x435.google.com with SMTP id y7so1761702pfg.8 for ; Thu, 21 Oct 2021 14:09:17 -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=5G0K+H2e7otmmKQ9zQj4DbcKrZpcr7GS6k3OOPhe8m0=; b=vCm+AY8XgFxNqih386bdjh1udkCg8ZLLYM8SkbeYNOAR48KzWyXJAy2WomEfqNuszo WK6zSBhDz7pkZEImz8D33Px0mn0TKUVcUuKmzg9g3dMhCOB+oy8+LIAwn/g17wcHltOB PfQBKZUyhe9tgFg0AWKRzPlU6BvfPRkSJp4uFCFB9aCggiKKi2K0f0ODdlEDAXmUwqeq FfE6ueRFLOgyMSVPBG3n+aKcnAtZ3ByWwhmQ2SNQWxHvGSJEag9xY5cI0V2brjgzAXJv 6fgJqSBUtvvBd+FgrUnl6J8jV56X9gBdNV0Y+AHZGOG5+qANK5tFQISHTt5cLSAK0P4n fRMA== 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=5G0K+H2e7otmmKQ9zQj4DbcKrZpcr7GS6k3OOPhe8m0=; b=ERTbfpXFjpTLHopRbODMWk8fxg5O03QfdUn2/evJIGt79yGYw/DEZdb4JgLpcN2oLt ytZ5u51GfByi0YBMwySe/qJIeJ1+WRxZpH5W2IQ/0CYAQjGFpNhIoAkdf2Dt+WAe3fVx /6gjZ/bkT8xarGCFcDK8kPe6Wpuy+KhA3vFvdPwBWrr+fHpnwM9I18QJ8iFv1oziHEmm ZuXfbLQLXfyVzgyuyGpLLU2ijFdYYurnWa3ksfxGim00cBmzqNaOddi+ZEphGVV+b1Hj wmjMJlVWmTrEPGRWdodjGFH15+wW7Rpya37IwIlcwPWP4PJ0GnfmAM9jvfXFsGv7zEM4 fCxA== X-Gm-Message-State: AOAM533at+tSayRm/jKOATZshY2yRVT5vFYAaXh/pPlBoj/liCp0sZIb z2NfElSC0gK5O1WqH4flMjHvP4OyAdQ8dA== X-Received: by 2002:a05:6a00:124e:b0:44d:cb39:40f6 with SMTP id u14-20020a056a00124e00b0044dcb3940f6mr8092425pfi.22.1634850556758; Thu, 21 Oct 2021 14:09:16 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id i5sm6258856pgo.36.2021.10.21.14.09.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Oct 2021 14:09:16 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 47/48] tcg/optimize: Propagate sign info for bit counting Date: Thu, 21 Oct 2021 14:05:38 -0700 Message-Id: <20211021210539.825582-48-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211021210539.825582-1-richard.henderson@linaro.org> References: <20211021210539.825582-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::435; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x435.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 Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" The results are generally 6 bit unsigned values, though the count leading and trailing bits may produce any value for a zero input. Signed-off-by: Richard Henderson --- tcg/optimize.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- 2.25.1 Reviewed-by: Alex Bennée diff --git a/tcg/optimize.c b/tcg/optimize.c index 64d3256bbc..3dd9219d69 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1215,7 +1215,7 @@ static bool fold_count_zeros(OptContext *ctx, TCGOp *op) g_assert_not_reached(); } ctx->z_mask = arg_info(op->args[2])->z_mask | z_mask; - + ctx->s_mask = smask_from_zmask(ctx->z_mask); return false; } @@ -1235,6 +1235,7 @@ static bool fold_ctpop(OptContext *ctx, TCGOp *op) default: g_assert_not_reached(); } + ctx->s_mask = smask_from_zmask(ctx->z_mask); return false; }