From patchwork Wed Feb 1 17:03:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella X-Patchwork-Id: 1735790 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=libc-alpha-bounces+incoming=patchwork.ozlabs.org@sourceware.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.a=rsa-sha256 header.s=default header.b=WhZn/oft; dkim-atps=neutral Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4P6T1K3t8pz23gY for ; Thu, 2 Feb 2023 04:09:41 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 63A2D3889E2A for ; Wed, 1 Feb 2023 17:09:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 63A2D3889E2A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1675271379; bh=uR+tmviJAnIQt3Uy9C/8G52NzH6k6qWZDh0/RH+zyro=; 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=WhZn/oft8PhGhlNEc09S7Y8xD+8pD7eKa18y7YMOxX36Du3751XFTqXnEJ86Q3kNy YrcV88tJMv0Nr/RpjqJBKxV30VgbUEa2W+sogwRiPSJj6uSKpPOQctNsodc76wK+pt 5icCWRVCBU3Ul0hAp2zj9qQgtO4FVRS+3S2OIwl8= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-ot1-x333.google.com (mail-ot1-x333.google.com [IPv6:2607:f8b0:4864:20::333]) by sourceware.org (Postfix) with ESMTPS id CC37B3858404 for ; Wed, 1 Feb 2023 17:04:49 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CC37B3858404 Received: by mail-ot1-x333.google.com with SMTP id n25-20020a9d7119000000b0068bd8c1e836so2373783otj.3 for ; Wed, 01 Feb 2023 09:04:49 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uR+tmviJAnIQt3Uy9C/8G52NzH6k6qWZDh0/RH+zyro=; b=SvZmmZgMe1LUuTXUe8Dfy+g6sSBOPpiK9a34Y6U9pueKl1ZEuioQosoC7lilFoBbta kdBgTtK5Ur3zYLUPuekCCpY15IL6F24Mbv5R6VHOmIdLD/MzTaNZIz9vnoa3LsOiszI4 3rQKgS59iWfzz/e7WXhDp0EJlkalUkOoHFk296C5j+vN9kvq4GbzNlg1IeeJ4rV7u/dv WdUoUwGRtJohG/yJA+T6sLGsvCvDv/ex5n+g/F4H2PFx6nuXCww9CS7MxUn8Uj5xb0LW 9zTMjLmviTFbHP5SGOMGxM04RoxkX7sKyzhqZ7Y9S5T0OLPD25DtfUPNDQwMWfUOKF6J KGPQ== X-Gm-Message-State: AO0yUKW2l5XnH8GrFqvAuKE8TRU4TiOA8om5MldXFf1QUkbuZob7DeY0 jbIs5lOZ0zrsU/vdDWA7FiSK918McZPFwTaJfSY= X-Google-Smtp-Source: AK7set+HT5qK7Xgzrp9N/n/ZZuGDGakLl19HjVNACpZCHioAjW6qwDcVrgfP3w4b3cghfcJesCRpHg== X-Received: by 2002:a9d:841:0:b0:68b:cec3:7fe5 with SMTP id 59-20020a9d0841000000b0068bcec37fe5mr1995128oty.4.1675271088450; Wed, 01 Feb 2023 09:04:48 -0800 (PST) Received: from mandiga.. ([2804:1b3:a7c2:1887:d2ed:98c2:d2cc:bf06]) by smtp.gmail.com with ESMTPSA id b17-20020a056830311100b006863ccbf067sm8077090ots.74.2023.02.01.09.04.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Feb 2023 09:04:47 -0800 (PST) To: libc-alpha@sourceware.org, Richard Henderson , Noah Goldstein , Jeff Law , Xi Ruoyao Subject: [PATCH v11 14/29] hppa: Add memcopy.h Date: Wed, 1 Feb 2023 14:03:51 -0300 Message-Id: <20230201170406.303978-15-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230201170406.303978-1-adhemerval.zanella@linaro.org> References: <20230201170406.303978-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-12.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) 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: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces+incoming=patchwork.ozlabs.org@sourceware.org Sender: "Libc-alpha" From: Richard Henderson GCC's combine pass cannot merge (x >> c | y << (32 - c)) into a double-word shift unless (1) the subtract is in the same basic block and (2) the result of the subtract is used exactly once. Neither condition is true for any use of MERGE. By forcing the use of a double-word shift, we not only reduce contention on SAR, but also allow the setting of SAR to be hoisted outside of a loop. Checked on hppa-linux-gnu. --- sysdeps/hppa/memcopy.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 sysdeps/hppa/memcopy.h diff --git a/sysdeps/hppa/memcopy.h b/sysdeps/hppa/memcopy.h new file mode 100644 index 0000000000..0d4b4ac435 --- /dev/null +++ b/sysdeps/hppa/memcopy.h @@ -0,0 +1,42 @@ +/* Definitions for memory copy functions, PA-RISC version. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#include + +/* Use a single double-word shift instead of two shifts and an ior. + If the uses of MERGE were close to the computation of shl/shr, + the compiler might have been able to create this itself. + But instead that computation is well separated. + + Using an inline function instead of a macro is the easiest way + to ensure that the types are correct. */ + +#undef MERGE + +static __always_inline op_t +MERGE (op_t w0, int shl, op_t w1, int shr) +{ + _Static_assert (OPSIZ == 4 || OPSIZ == 8, "Invalid OPSIZE"); + + op_t res; + if (OPSIZ == 4) + asm ("shrpw %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr)); + else if (OPSIZ == 8) + asm ("shrpd %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr)); + return res; +}