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[209.132.180.67]) by mx.google.com with ESMTP id i8si14716735pgs.87.2019.09.03.09.43.57; Tue, 03 Sep 2019 09:43:57 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Y1N3tMki; spf=pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-crypto-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730118AbfICQn5 (ORCPT + 3 others); 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-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(-) -- 2.17.1 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 */