From nobody Wed Apr 16 04:32:51 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1599169345; cv=none; d=zohomail.com; s=zohoarc; b=mTe5gfbSULFdvelpNcIFmuAbOtCDzT1RfHocpaYmmflSAgOdafy+5Dy/qY5CmkfYXMAoL7i6aTceZYw8fnIESgrBcYfOAIl+9KFWgJHWDfeLH3/RNn2o/WEKgbDti7L2rkATpRxOIrG/bWOhT8K95w313j2jlVUpK1v/EwQxBeQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1599169345; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ujJytkO077otcKV33Z+6URYnEerHnMmPUii31K7Opk8=; b=ASFx8wASAO1LhglD8F3RD5VcNsyxVMH3pxXp9ZA8oP3t4T7wWzT2k/bL83rc9ZQmlBYbIrGjFhq3ZuPVUtrRW3kMxkcIJjZj87yY49/Fh+Tn19ycIA2JsC/B+o3AFaDZo9TuAumJ7MQS+vte2hnqWuSzWZJyD5UZiVE5dcD5hEM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1599169345514257.1225631503313; Thu, 3 Sep 2020 14:42:25 -0700 (PDT) Received: from localhost ([::1]:40738 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kDwzw-0000pZ-Mf for importer@patchew.org; Thu, 03 Sep 2020 17:42:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39738) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kDwyo-0007S1-DX for qemu-devel@nongnu.org; Thu, 03 Sep 2020 17:41:15 -0400 Received: from mail-pj1-x1035.google.com ([2607:f8b0:4864:20::1035]:36159) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kDwyi-0004aI-7U for qemu-devel@nongnu.org; Thu, 03 Sep 2020 17:41:14 -0400 Received: by mail-pj1-x1035.google.com with SMTP id q1so2095762pjd.1 for ; Thu, 03 Sep 2020 14:41:07 -0700 (PDT) Received: from localhost.localdomain ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id v17sm4113290pfn.24.2020.09.03.14.41.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2020 14:41:05 -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=ujJytkO077otcKV33Z+6URYnEerHnMmPUii31K7Opk8=; b=nNVsemZumGQHzPZsmDIwWSVy9lKcieRa11sGrPfas3bq5Q8s07H314usupPsyAbNzy IbXlAMI5XpJVxz1Hxzv3dLzOu9gf11NMCLi6pvg8upRUJYsnTYIxGS2G+zB0fRtmKRSJ QlQTdbyBBjfIdv/ayuqFIFhhJkJ9GS/B34uKWO1m9NM6ehCDFkjXT6KNQzW1yx8TJWCM z3avuA1xWtBQthHOpp0h46Z2yug1MQfbLtBmz0mRE3D4+1VDIPxlYMP6YZUhqUaW5DBQ PM7EI/hR1OZmFZJ4u6gr1bp9jZtmgX7Cb1UHO+S7e+gVYiKrwUJjmwIGtg3h1dRpa2F5 zM2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ujJytkO077otcKV33Z+6URYnEerHnMmPUii31K7Opk8=; b=K4euij79VzXINqrZKbCUtU7t94gY1Z+oGn14YFtaGympsg0+jMGtxBoAwXjsnF3LMB tOGedSb8cFSHTkgcxMAUwX8mLDDgthQ6lNrOsCp9sFbGbnzOwmcGIu1yn/n4n4OOJWGz Fgq/YDTWI70kvtjHku735Tl/9gzii8ZCTibwS9NSk+XY7VEdmhNF1+dMZN4yw0k9qTn2 LXkLBPIBgv23deNkLpcURpBN9525M5b5zSRIZkX2pLS66zJEEHP8s25Fl5Q7MXQCKAed A3wjdPAuw3mOzGdMhgPHhHEv0fYh02kS/XSauteHey80pBTwA341koJJaPRVDCVngp9F 8UYA== X-Gm-Message-State: AOAM533vQSYBj8GkHlThHydZU3GTIrFqTCEmgfrVcsN26/DhY6wo4Jmd +JTdttLrk1lJfTzrYpM4UvddyxWUgRfOCA== X-Google-Smtp-Source: ABdhPJyh/9ucyiqnpcm/plApsTotHR5qxKMI5JvApPoJoBqpbJdmMLXXJ7T+jlVHQzHfvSD+l1ir5A== X-Received: by 2002:a17:90a:5a01:: with SMTP id b1mr4828268pjd.27.1599169266244; Thu, 03 Sep 2020 14:41:06 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 2/5] tcg: Fix tcg gen for vectorized absolute value Date: Thu, 3 Sep 2020 14:40:58 -0700 Message-Id: <20200903214101.1746878-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200903214101.1746878-1-richard.henderson@linaro.org> References: <20200903214101.1746878-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1035; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1035.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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: peter.maydell@linaro.org, Stephen Long Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" From: Stephen Long The fallback inline expansion for vectorized absolute value, when the host doesn't support such an insn was flawed. E.g. when a vector of bytes has all elements negative, mask will be 0xffff_ffff_ffff_ffff. Subtracting mask only adds 1 to the low element instead of all elements becase -mask is 1 and not 0x0101_0101_0101_0101. Signed-off-by: Stephen Long Message-Id: <20200813161818.190-1-steplong@quicinc.com> Signed-off-by: Richard Henderson --- tcg/tcg-op-gvec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c index 3707c0effb..793d4ba64c 100644 --- a/tcg/tcg-op-gvec.c +++ b/tcg/tcg-op-gvec.c @@ -2264,12 +2264,13 @@ static void gen_absv_mask(TCGv_i64 d, TCGv_i64 b, u= nsigned vece) tcg_gen_muli_i64(t, t, (1 << nbit) - 1); =20 /* - * Invert (via xor -1) and add one (via sub -1). + * Invert (via xor -1) and add one. * Because of the ordering the msb is cleared, * so we never have carry into the next element. */ tcg_gen_xor_i64(d, b, t); - tcg_gen_sub_i64(d, d, t); + tcg_gen_andi_i64(t, t, dup_const(vece, 1)); + tcg_gen_add_i64(d, d, t); =20 tcg_temp_free_i64(t); } --=20 2.25.1