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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 E60C8C3A5A2 for ; Tue, 3 Sep 2019 16:43:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BEF4621881 for ; Tue, 3 Sep 2019 16:43:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Y1N3tMki" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730118AbfICQn5 (ORCPT ); Tue, 3 Sep 2019 12:43:57 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:37925 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728854AbfICQn5 (ORCPT ); Tue, 3 Sep 2019 12:43:57 -0400 Received: by mail-pf1-f196.google.com with SMTP id h195so4576583pfe.5 for ; Tue, 03 Sep 2019 09:43:56 -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=gkbLgubyXxiJMMRMzAmpKCmMYVcmKbpOZX5ob6E8mqs=; b=Y1N3tMkiZScTCyMI8i+q2vzi1sOGzQSoqt/D/zN5IwCEIXpRElOP7pBpBB3JMeiYin nnNv8+gg5JvB5xmZ0L2mqda6onQg97YTutIlPOhE5w6OSlbJOggzrDGjdePWjre1SG2k MKrEC/9BMHmgvQMqytJF5EzuZ8qwI69iG7YSoUIlgUdJu0xrKVXIvjoaqqpdpsCHZbox zwgSF9ihqMP8c0ampc2sLHfl/58O3zeMa//4/qJBjeSIoGIxWQ5fIBEbev1fHqnYIFl0 fiKssFaNc6y2spi2cg1Hl9yYgq1T76u8jhjTRnN1XWg+h/ZsqoCfw9S/78qOZpbX56eO 9K2w== 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=gkbLgubyXxiJMMRMzAmpKCmMYVcmKbpOZX5ob6E8mqs=; b=NYB3SylRkeA9egQ6tBXCPhwOJBIMIPtvs9OnFmlZ+yv99MmD+8ZCgV1ZmoxN01FiJ7 MbLmNI4iyT9lDqK48u2+l6T1Uoe/qJ8Z0sHYybu/rU+hzRSCQUbHjU9I8XErS8kQ2IIW 1vRSosBlUGjJzr0YDQsrlWd22XLqyNTf5FKo9YkyEUGt9w8y8+9odvh6WWNpJflby29p HANJ0xqw6/4bEBuGWgUSoJtik3PyPXpw5CdD1tZD07qNd+Jt4E0I/N2MBjT2vmFvMHvd HLO7sqt96LBhJiY3SqpwRQWYK88Q8luTYklrKypf08KPJPOx5PzjpfUfQ9U0n69VUOCn 1mOw== X-Gm-Message-State: APjAAAXHssrx5dyd6IY/Ir8Bp5WcjVZXY2K2tnNq2c3QsGNKektqyWkQ O9LdeopJ/k0jotfce3h2pHMkTE8nNqf5daN0 X-Google-Smtp-Source: APXvYqxLN8jPnb4M9qzlorDiYEPu3SkvH5l5etJUT4+eZ1j0a1Bn/o3KiRzyyn5dl+o7/Lpo4ilsfA== X-Received: by 2002:aa7:8559:: with SMTP id y25mr40695542pfn.260.1567529036208; Tue, 03 Sep 2019 09:43:56 -0700 (PDT) Received: from e111045-lin.nice.arm.com ([104.133.8.102]) by smtp.gmail.com with ESMTPSA id b126sm20311847pfb.110.2019.09.03.09.43.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Sep 2019 09:43:55 -0700 (PDT) From: Ard Biesheuvel To: linux-crypto@vger.kernel.org Cc: herbert@gondor.apana.org.au, ebiggers@kernel.org, Ard Biesheuvel Subject: [PATCH v2 09/17] crypto: arm64/aes-cts-cbc-ce - performance tweak Date: Tue, 3 Sep 2019 09:43:31 -0700 Message-Id: <20190903164339.27984-10-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190903164339.27984-1-ard.biesheuvel@linaro.org> References: <20190903164339.27984-1-ard.biesheuvel@linaro.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Optimize away one of the tbl instructions in the decryption path, which turns out to be unnecessary. Signed-off-by: Ard Biesheuvel --- arch/arm64/crypto/aes-modes.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S index 2879f030a749..38cd5a2091a8 100644 --- a/arch/arm64/crypto/aes-modes.S +++ b/arch/arm64/crypto/aes-modes.S @@ -293,12 +293,11 @@ AES_ENTRY(aes_cbc_cts_decrypt) ld1 {v5.16b}, [x5] /* get iv */ dec_prepare w3, x2, x6 - tbl v2.16b, {v1.16b}, v4.16b decrypt_block v0, w3, x2, x6, w7 - eor v2.16b, v2.16b, v0.16b + tbl v2.16b, {v0.16b}, v3.16b + eor v2.16b, v2.16b, v1.16b tbx v0.16b, {v1.16b}, v4.16b - tbl v2.16b, {v2.16b}, v3.16b decrypt_block v0, w3, x2, x6, w7 eor v0.16b, v0.16b, v5.16b /* xor with iv */ -- 2.17.1