From nobody Thu Nov 6 06:25:26 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1539291936743117.221691403048; Thu, 11 Oct 2018 14:05:36 -0700 (PDT) Received: from localhost ([::1]:37134 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gAi9C-00083r-B0 for importer@patchew.org; Thu, 11 Oct 2018 17:05:30 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45208) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gAhwq-0006sT-Ca for qemu-devel@nongnu.org; Thu, 11 Oct 2018 16:52:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gAhwn-00066c-2C for qemu-devel@nongnu.org; Thu, 11 Oct 2018 16:52:44 -0400 Received: from mail-pl1-x643.google.com ([2607:f8b0:4864:20::643]:44579) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gAhwm-0005lJ-Lv for qemu-devel@nongnu.org; Thu, 11 Oct 2018 16:52:40 -0400 Received: by mail-pl1-x643.google.com with SMTP id p25-v6so4780510pli.11 for ; Thu, 11 Oct 2018 13:52:38 -0700 (PDT) Received: from cloudburst.twiddle.net (97-113-8-179.tukw.qwest.net. [97.113.8.179]) by smtp.gmail.com with ESMTPSA id h87-v6sm34707866pfj.78.2018.10.11.13.52.35 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 11 Oct 2018 13:52:36 -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; bh=AYK/ZIQW1EHNbmquJ4sIeiHZrTd+Lp6TndyiSWMD0Po=; b=gr0wORELwwK5xV0KI3V3fJVbFdlE8Jz2QPrzoZhsjK69/EYPjGpwGmW2WOhBsubeBx z31BWkznaG88KcSdElMR3/9VPabuzB881rfjqzEAhlEzVUSnnkM6JRlfSwM+bgDD8egv nQE/OUJkvB+UN6SFhQFoRtecZpW0NU5RTqvrc= 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; bh=AYK/ZIQW1EHNbmquJ4sIeiHZrTd+Lp6TndyiSWMD0Po=; b=d+hskyr5RJm3r4QgLPJOW1s+9Kc6ANGFsjRYrqnWxskouSgEq+uPf5F/H5+6CkyD2g D6AP/Oop6YfqYTFBz5nN1xC0QKbcKdMGeIgYm0iDOhduNtEf0rXzBoUpXZsGXcFxj8y+ +GjTalQkqDYSFvi3ScKolQ8MLB7SX2S1epjYRxzGAl3zB/UX8z9z9wK56crz4FREgkwh K8i/x22vBWPgrz5rBWP2WLhTmjk4BQIx+i+lNZVzwPnU7QtGrNOPPUWwEipgMaObcN2p L6f/IrYD+971O/6xT0BL5JFPqh/fLZX1rkzuFlQbN006By6+IDkWziP+10Dc9SjEHl1c 2Fkg== X-Gm-Message-State: ABuFfojC+0btmm08Wqad31jZtB7SCmzPjZ7VTLAem1b0teSfd2YmnjHT PyJkhlZeh5XKAouf7rR8rp6DJ8bSkPs= X-Google-Smtp-Source: ACcGV63oJbOJY0xptl46CJrVOhDjM0gUBrj0HblOCayEH1jE8ovlK3NA4gkXHMrIxXEmqDhmNT6Hcg== X-Received: by 2002:a17:902:2:: with SMTP id 2-v6mr3095516pla.178.1539291156975; Thu, 11 Oct 2018 13:52:36 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 11 Oct 2018 13:52:05 -0700 Message-Id: <20181011205206.3552-20-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181011205206.3552-1-richard.henderson@linaro.org> References: <20181011205206.3552-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::643 Subject: [Qemu-devel] [PATCH 19/20] target/arm: Promote consecutive memory ops for aa32 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDMRC_1 RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" For a sequence of loads or stores from a single register, little-endian operations can be promoted to an 8-byte op. This can reduce the number of operations by a factor of 8. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- target/arm/translate.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/target/arm/translate.c b/target/arm/translate.c index 12a744b3c3..09f2d648b7 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -5011,6 +5011,16 @@ static int disas_neon_ls_insn(DisasContext *s, uint3= 2_t insn) if (size =3D=3D 3 && (interleave | spacing) !=3D 1) { return 1; } + /* For our purposes, bytes are always little-endian. */ + if (size =3D=3D 0) { + endian =3D MO_LE; + } + /* Consecutive little-endian elements from a single register + * can be promoted to a larger little-endian operation. + */ + if (interleave =3D=3D 1 && endian =3D=3D MO_LE) { + size =3D 3; + } tmp64 =3D tcg_temp_new_i64(); addr =3D tcg_temp_new_i32(); tmp2 =3D tcg_const_i32(1 << size); --=20 2.17.1