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[209.51.188.17]) by mx.google.com with ESMTPS id y9si526155ual.28.2021.06.21.16.32.20 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 21 Jun 2021 16:32:20 -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=fvRUQUEx; 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]:42288 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lvTOu-0004VX-3L for patch@linaro.org; Mon, 21 Jun 2021 19:32:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41984) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lvTCB-0001Hc-U3 for qemu-devel@nongnu.org; Mon, 21 Jun 2021 19:19:11 -0400 Received: from mail-pj1-x1029.google.com ([2607:f8b0:4864:20::1029]:50707) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lvTC5-00061h-N6 for qemu-devel@nongnu.org; Mon, 21 Jun 2021 19:19:11 -0400 Received: by mail-pj1-x1029.google.com with SMTP id g4so10911004pjk.0 for ; Mon, 21 Jun 2021 16:19:05 -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=jZ+vu44B3MA2rQDPHlYV5+XUBqzkPAnWuZi1J6wYDao=; b=fvRUQUExehKyuom6BcYiv/jXENph20unEftdPqTkJmY+tQU7NAi6QvQ44OJK9bD80P QlpaCWgryZ2oTJawcFuHda1/S4TzN3l3GtSKlkP2ozzsPlTa0URHc9H+IbaQmWsWJQjT IAhNtqap03MdzfC40jcfD39+02U9we9dT8yspRK/y3AOCACawEQowHWLlArXb3Jw0RIl 4Ak0oBvygSjDgnFzx2Sy2Fi4gmawuux1czF+DhwL80APXqUS812D7Evow7N7vuxoyBwJ z27QSgImPDeH3pHegrb5w6zZGCBBNcHW+5tbNXq1o96L+UfUfcestqPvLMKGPTI7GhGX epAw== 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=jZ+vu44B3MA2rQDPHlYV5+XUBqzkPAnWuZi1J6wYDao=; b=qI6khg2ASkpAMCtkxycxu5eroYYxqUCm3pEFf1YaYu7dIV7feAZbJVvk9/Yjc9gemG kb2A2SvMI9aNdvuX3yoQSmbtueSQscBUUxFY/W/xoduTK5JPOy2Q8o88ZQAH15WqEavf jMwgybNktjqlLYMXUQt6tU1fRs30bwGNtOyYXsGUdjiqlqbd0vtmJMdVRsdqgIBtGZ44 ACvAwaMovanrg8ZL2VK00pcP0Z7FHj7G+AUixCaRReaB8JHL/ly9yCcWVzLd865HxtnQ wtk6ojCQ4GRPvnHN6Xg7vmfF4fwx4b5XfkF+d97Zu1DrDBBNx0qk9t5FUWvcLwRGlW9q uhQw== X-Gm-Message-State: AOAM531GPVx45YGE+Tis3ronK1NpDO7ZhdkCA8HtehxyjDze52tctAT4 laSj7JHc+moaObe4GzHFaIuDo9/t1kISFg== X-Received: by 2002:a17:90a:5408:: with SMTP id z8mr672061pjh.144.1624317544360; Mon, 21 Jun 2021 16:19:04 -0700 (PDT) Received: from localhost.localdomain ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id 135sm14429952pgf.20.2021.06.21.16.19.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Jun 2021 16:19:04 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 21/29] target/arm: Improve REV32 Date: Mon, 21 Jun 2021 16:18:41 -0700 Message-Id: <20210621231849.1871164-22-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210621231849.1871164-1-richard.henderson@linaro.org> References: <20210621231849.1871164-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1029; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1029.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 , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?b?YXVkw6k=?= Errors-To: qemu-devel-bounces+patch=linaro.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. Reviewed-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- target/arm/translate-a64.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) -- 2.25.1 diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index f2641a37ba..304fd3d370 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); } }