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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 581ADC48BE8 for ; Mon, 14 Jun 2021 08:56:03 +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 057576128A for ; Mon, 14 Jun 2021 08:56:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 057576128A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60772 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsiO2-00028W-3Q for qemu-devel@archiver.kernel.org; Mon, 14 Jun 2021 04:56:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46278) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsi6y-0002XX-Oh for qemu-devel@nongnu.org; Mon, 14 Jun 2021 04:38:24 -0400 Received: from mail-pl1-x62c.google.com ([2607:f8b0:4864:20::62c]:41780) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lsi6o-0003ct-OQ for qemu-devel@nongnu.org; Mon, 14 Jun 2021 04:38:24 -0400 Received: by mail-pl1-x62c.google.com with SMTP id e1so6151794plh.8 for ; Mon, 14 Jun 2021 01:38:14 -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=u6MGt+Q30W0DPkO3zn0zAr3wVy2EgLq+Mej76ef0rEM=; b=SzYiMDuWQ9M/iRz/zbb54S69iYKXEYw9D1aFyKYxn9Y6uvsSYiPsAbh6fW2DyeZEFY EK8K/+BdU+eroAIrRwqPnufs/320D5jX0IfkE4MOP3dL/Cn6Jfsc7a5dRTOSNl9V4qjg oOy+QF2TSG8HtCvu5flahGjGBh4oXMQkCFqpG9rLwdD9kJ6B6DH8qDXoxUC05bKewj64 04fiFpzeqK5zDD1FL8gHvF2fGMjpG0Tmsff3MVhw7drwAeOAUdB5qvFe1HAoPkJN8okt u8QCF9m87nbb3X2DY3oC5c7cOqCuNEQwvgN2q691CN8TK8YkVa95AD8+bIvMa+lLHHNP ulQQ== 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=u6MGt+Q30W0DPkO3zn0zAr3wVy2EgLq+Mej76ef0rEM=; b=TaCEBSUASvhh95Lz92D7dFre+XAta6IBEpG88y+pMyIO8jCvubqwOgnD9VsX7CJYLx 66irBnxrLiC34WIGRy7W6Dm28iuFg5pl5M9kY2gQwqKNLvmHzz1f+rQ2oxx5j0TDaODd Jn0SHrpmfrT1ziFJUO2HKIjfes/KeK+3smJOjXvjbKa5CAv3R1IdCkCjgf8wPr8LE3h+ Fu77ys0EvuQKwXqTN2WCtoZTVwy6qJEKi/QBqld8JmcIQt38TSCjQPbr+0SRpyTjfTHU ZqrwY6J0yymtK8y1aPqZnWHRW1DiVdmmVxUMZI3EDleJ/lnglemgwVLmAVD1shsc18Ov RM7A== X-Gm-Message-State: AOAM532H6v1KtaRBZPn7ltXhUrtcUN9erjUqPZSOP5YHDGqrOcwxa8fN oqI3nGNouAMZDsTmxqE7GbZRJjMGqOElMQ== X-Google-Smtp-Source: ABdhPJyBphYKRUlS67RlqZ7hRONFHhKcskarFe/vwjt58vrWpzJgjUwNzX9q4P0QRsUwW5c3ZBk4nA== X-Received: by 2002:a17:902:c20d:b029:110:483c:b965 with SMTP id 13-20020a170902c20db0290110483cb965mr15756500pll.77.1623659893429; Mon, 14 Jun 2021 01:38:13 -0700 (PDT) Received: from localhost.localdomain (174-21-70-228.tukw.qwest.net. [174.21.70.228]) by smtp.gmail.com with ESMTPSA id h20sm2242022pfh.24.2021.06.14.01.38.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 01:38:13 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 20/28] target/arm: Improve REV32 Date: Mon, 14 Jun 2021 01:37:52 -0700 Message-Id: <20210614083800.1166166-21-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210614083800.1166166-1-richard.henderson@linaro.org> References: <20210614083800.1166166-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::62c; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62c.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: Peter Maydell Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" For the sf version, we are performing two 32-bit bswaps in either half of the register. This is equivalent to performing one 64-bit bswap followed by a rotate. For the non-sf version, we can remove TCG_BSWAP_IZ and the preceding zero-extension. Cc: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/translate-a64.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index e0785ce859..ea9d2d4647 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -5430,22 +5430,13 @@ static void handle_rev32(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd = cpu_reg(s, rd); + TCGv_i64 tcg_rn = cpu_reg(s, rn); if (sf) { - TCGv_i64 tcg_tmp = tcg_temp_new_i64(); - TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); - - /* bswap32_i64 requires zero high word */ - tcg_gen_ext32u_i64(tcg_tmp, tcg_rn); - tcg_gen_bswap32_i64(tcg_rd, tcg_tmp, TCG_BSWAP_IZ | TCG_BSWAP_OZ); - tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32); - tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp, TCG_BSWAP_IZ | TCG_BSWAP_OZ); - tcg_gen_concat32_i64(tcg_rd, tcg_rd, tcg_tmp); - - tcg_temp_free_i64(tcg_tmp); + tcg_gen_bswap64_i64(tcg_rd, tcg_rn); + tcg_gen_rotri_i64(tcg_rd, tcg_rd, 32); } else { - tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rn)); - tcg_gen_bswap32_i64(tcg_rd, tcg_rd, TCG_BSWAP_IZ | TCG_BSWAP_OZ); + tcg_gen_bswap32_i64(tcg_rd, tcg_rn, TCG_BSWAP_OZ); } } -- 2.25.1