From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa1-x2b.google.com (mail-oa1-x2b.google.com [IPv6:2001:4860:4864:20::2b]) by sourceware.org (Postfix) with ESMTPS id 02FAF3858415 for ; Mon, 19 Sep 2022 19:59:51 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 02FAF3858415 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=linaro.org Received: by mail-oa1-x2b.google.com with SMTP id 586e51a60fabf-11e9a7135easo999489fac.6 for ; Mon, 19 Sep 2022 12:59:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=5Q75peyS5l0VDpGdS8vy98EFqHj2so5KzVl/+o8GJjk=; b=nC7zW8dCXMVhXLAsbobksxW0xi5VqOixPlMzcHiGM6z8LRX/nLBv4X6h6pFxyGhFcJ MsX1jex5C5biH2G+kO69mT5yPEzFnfSGFqkSXAoxf31LliVnWa5tjM75Lzf+EkI+ge7Y MVtoXmG3BJfrAzENy7K7w2q85gtD3maTPQgoSfFZkDyGywQH4tWWmVPVMs9Av+zgSAzF pMa6N31n7EaKmzxFUJzod0MxzIgXighU0Yx4USEhFd1x5mzXDNNJUJyEtRlBPrn729Rp 7/B7gDKUTeaKRN/vr3/eKAaf+t0AZ8owi92ZtvQ5RZHfMiDeIAzeW/ujhM0cv6l9eVXt nc9w== 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:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=5Q75peyS5l0VDpGdS8vy98EFqHj2so5KzVl/+o8GJjk=; b=Hf1sGhWMDE+U6ryQDvvHE+gA7yKuY2Bxvryp3SEURjV5MO5DcDPIdEEGpQlR5aFYOi Bh8ut0xiiXm1lxDMngmwXES9LR6A0SZXqUvYWm5MeS228Etri3WLWBWflZYiUtEDafVz 93zGld1trjr4/wBzKgvU0BOSuKMBAGNCBFG2sxH/hzSCnbko4ooQCW3I2IbbOzY3GPj4 SuQMwTkO1hnMHsCFcP0Vfmg6MZwZlgt0Vn5o9pKN0SI1+ZXXvvH3qJGNdfDRltyWq5KA Shsy3A7KjnlYZVUplwtPa/LYEdTJuBfDZMOjsHX+ywEJbkn9VyQkeMF11Vb4AvwBnOmK SKQw== X-Gm-Message-State: ACrzQf36kqt7xLlYSZcqOlYKU+omChHhyqlea0MN9eWv5xEdG8En2Tvj GQPqKn4PBoTJq85I33HEfav9QI/jLYq0b2kh X-Google-Smtp-Source: AMsMyM4n0jy5hrA62snfgPobUGomtw+uQBrA99+ejmjiUThwlN4hgfjvE4vvvBKqI1l1uLkPpSf1Ow== X-Received: by 2002:a05:6870:701f:b0:127:8afc:e62c with SMTP id u31-20020a056870701f00b001278afce62cmr10475935oae.234.1663617590420; Mon, 19 Sep 2022 12:59:50 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c1:c266:b3ad:a56d:1ca:d6ea]) by smtp.gmail.com with ESMTPSA id l7-20020a4ab0c7000000b00475dc6c6f31sm4532291oon.45.2022.09.19.12.59.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Sep 2022 12:59:50 -0700 (PDT) From: Adhemerval Zanella To: libc-alpha@sourceware.org Cc: Richard Henderson Subject: [PATCH v5 16/17] powerpc: Add string-fza.h Date: Mon, 19 Sep 2022 16:59:19 -0300 Message-Id: <20220919195920.956393-17-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220919195920.956393-1-adhemerval.zanella@linaro.org> References: <20220919195920.956393-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 List-Id: From: Richard Henderson While ppc has the more important string functions in assembly, there are still a few generic routines used. Use the Power 6 CMPB insn for testing of zeros. Checked on powerpc64le-linux-gnu. --- sysdeps/powerpc/string-fza.h | 70 ++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 sysdeps/powerpc/string-fza.h diff --git a/sysdeps/powerpc/string-fza.h b/sysdeps/powerpc/string-fza.h new file mode 100644 index 0000000000..21fc697a9c --- /dev/null +++ b/sysdeps/powerpc/string-fza.h @@ -0,0 +1,70 @@ +/* Zero byte detection; basics. PowerPC version. + Copyright (C) 2022 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 + . */ + +#ifndef _POWERPC_STRING_FZA_H +#define _POWERPC_STRING_FZA_H 1 + +/* PowerISA 2.05 (POWER6) provides cmpb instruction. */ +#ifdef _ARCH_PWR6 +# include + +/* This function returns 0xff for each byte that is + equal between X1 and X2. */ + +static inline op_t +find_eq_all (op_t x1, op_t x2) +{ + op_t ret; + asm ("cmpb %0,%1,%2" : "=r"(ret) : "r"(x1), "r"(x2)); + return ret; +} + +/* This function returns 0xff for each byte that is zero in X. */ + +static inline op_t +find_zero_all (op_t x) +{ + return find_eq_all (x, 0); +} + +/* Identify zero bytes in X1 or equality between X1 and X2. */ + +static inline op_t +find_zero_eq_all (op_t x1, op_t x2) +{ + return find_zero_all (x1) | find_eq_all (x1, x2); +} + +/* Identify zero bytes in X1 or inequality between X1 and X2. */ + +static inline op_t +find_zero_ne_all (op_t x1, op_t x2) +{ + return find_zero_all (x1) | ~find_eq_all (x1, x2); +} + +/* Define the "inexact" versions in terms of the exact versions. */ +# define find_zero_low find_zero_all +# define find_eq_low find_eq_all +# define find_zero_eq_low find_zero_eq_all +# define find_zero_ne_low find_zero_ne_all +#else +# include +#endif /* _ARCH_PWR6 */ + +#endif /* _POWERPC_STRING_FZA_H */ -- 2.34.1