From patchwork Mon May 24 01:30:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Noah Goldstein X-Patchwork-Id: 43549 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 4905C385380E; Mon, 24 May 2021 01:30:55 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4905C385380E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1621819855; bh=VrRKV+iIRWdZ5IaKmeJiGfDTY03dTVrOw3FSDcmy4Mc=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=JoECtmGobFvFkDAyS5I4gkxXLdmIvJRERDvb2D7Me71qUSYd/Z24YbrB4eNM0tMVI 82ouKkiqSQaE9o4NlBrUnWJ2iteQBhWubaesL2x1CGiOqFNTX0m80zO9AmP4t9YvBL OFMxUcrQ4xB1nIIgCPqrD+AH0F48+zvCPCgn8gMk= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-qv1-xf2f.google.com (mail-qv1-xf2f.google.com [IPv6:2607:f8b0:4864:20::f2f]) by sourceware.org (Postfix) with ESMTPS id 8758E3857C74 for ; Mon, 24 May 2021 01:30:52 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 8758E3857C74 Received: by mail-qv1-xf2f.google.com with SMTP id q6so13437761qvb.2 for ; Sun, 23 May 2021 18:30:52 -0700 (PDT) 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=VrRKV+iIRWdZ5IaKmeJiGfDTY03dTVrOw3FSDcmy4Mc=; b=hVgWAUK6DD0oTlv7vZqQ1+C0j/XT0zl3SPzakHVEYrgrI1a7iQcQ3aRruow/c9WRks yhrNWKmw1k3gN3oMfIg2PBhSnvRVjmc3YpyT+Hl/YjnvadcT3BHlLAiz5sNuVUVk4Evx QjkijUZhd0nz0j0B+qocjr/NaDDyAg3tvzY+rpu/ppKEECqkeaO9rcyBiab86Msc3ps2 nJ0mejtLOVqX4101RVYItA4KRCPiE2I9eUK2pFZrBEs7EeGR2OnhK5EiL3XZHgZAJSpf lzUlXbQ3/N0mlXV4ACIElDB8qT3XdgdAoa+RQLDh5MMIfZdytiqcY/UvmfL+8Ub7p4LC TFag== X-Gm-Message-State: AOAM530Mnmqhcpt1y+oWdP2jFOtYhpymrqyVE+LcjxVgGk1QnLuttZ/A 1rAIx6KTkUnJooC18WF8f2D6x7j2ET7kqg== X-Google-Smtp-Source: ABdhPJzFWdKypX2fJrH+gcDcJohb6JTjjkRi0TrCv0MKxVk45NjFZrpX2GZDH+4EL3fhYk1PHWhGUQ== X-Received: by 2002:ad4:4184:: with SMTP id e4mr27447507qvp.13.1621819852056; Sun, 23 May 2021 18:30:52 -0700 (PDT) Received: from noah-tigerlake.home (pool-71-245-178-39.pitbpa.fios.verizon.net. [71.245.178.39]) by smtp.googlemail.com with ESMTPSA id d12sm5523041qkn.126.2021.05.23.18.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 May 2021 18:30:51 -0700 (PDT) To: libc-alpha@sourceware.org Subject: [PATCH v1 2/2] x86: Improve memmove-vec-unaligned-erms.S Date: Sun, 23 May 2021 21:30:20 -0400 Message-Id: <20210524013020.1869687-2-goldstein.w.n@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524013020.1869687-1-goldstein.w.n@gmail.com> References: <20210524013020.1869687-1-goldstein.w.n@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-12.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Noah Goldstein via Libc-alpha From: Noah Goldstein Reply-To: Noah Goldstein Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" This patch changes the condition for copy 4x VEC so that if length is exactly equal to 4 * VEC_SIZE it will use the 4x VEC case instead of 8x VEC case. Results For Skylake memcpy-avx2-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 0 , 9.137 , 6.873 , New , 75.22 128 , 7 , 0 , 12.933 , 7.732 , New , 59.79 128 , 0 , 7 , 11.852 , 6.76 , New , 57.04 128 , 7 , 7 , 12.587 , 6.808 , New , 54.09 Results For Icelake memcpy-evex-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 0 , 9.963 , 5.416 , New , 54.36 128 , 7 , 0 , 16.467 , 8.061 , New , 48.95 128 , 0 , 7 , 14.388 , 7.644 , New , 53.13 128 , 7 , 7 , 14.546 , 7.642 , New , 52.54 Results For Tigerlake memcpy-evex-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 0 , 8.979 , 4.95 , New , 55.13 128 , 7 , 0 , 14.245 , 7.122 , New , 50.0 128 , 0 , 7 , 12.668 , 6.675 , New , 52.69 128 , 7 , 7 , 13.042 , 6.802 , New , 52.15 Results For Skylake memmove-avx2-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 32 , 6.181 , 5.691 , New , 92.07 128 , 32 , 0 , 6.165 , 5.752 , New , 93.3 128 , 0 , 7 , 13.923 , 9.37 , New , 67.3 128 , 7 , 0 , 12.049 , 10.182 , New , 84.5 Results For Icelake memmove-evex-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 32 , 5.479 , 4.889 , New , 89.23 128 , 32 , 0 , 5.127 , 4.911 , New , 95.79 128 , 0 , 7 , 18.885 , 13.547 , New , 71.73 128 , 7 , 0 , 15.565 , 14.436 , New , 92.75 Results For Tigerlake memmove-evex-erms size, al1 , al2 , Cur T , New T , Win , New / Cur 128 , 0 , 32 , 5.275 , 4.815 , New , 91.28 128 , 32 , 0 , 5.376 , 4.565 , New , 84.91 128 , 0 , 7 , 19.426 , 14.273 , New , 73.47 128 , 7 , 0 , 15.924 , 14.951 , New , 93.89 Signed-off-by: Noah Goldstein --- sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S index 5e4a071f16..d36cd288c7 100644 --- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S @@ -420,7 +420,7 @@ L(more_2x_vec): cmpq $(VEC_SIZE * 8), %rdx ja L(more_8x_vec) cmpq $(VEC_SIZE * 4), %rdx - jb L(last_4x_vec) + jbe L(last_4x_vec) /* Copy from 4 * VEC to 8 * VEC, inclusively. */ VMOVU (%rsi), %VEC(0) VMOVU VEC_SIZE(%rsi), %VEC(1)