From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa1-x29.google.com (mail-oa1-x29.google.com [IPv6:2001:4860:4864:20::29]) by sourceware.org (Postfix) with ESMTPS id D812238582BE for ; Thu, 2 Feb 2023 18:12:42 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org D812238582BE 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-x29.google.com with SMTP id 586e51a60fabf-163bd802238so3591089fac.1 for ; Thu, 02 Feb 2023 10:12:42 -0800 (PST) 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:to:from:from:to:cc:subject:date:message-id :reply-to; bh=iBGDBU1LOIu4kx/c1fhVkLNNrKP6X4acltTDNOqXoVA=; b=eBeSfyGpLwjHuVU5Mn2ZhDoTyx5VIkJatiqOTZXtUSa5CcDvqX9EUDM3A6WmoL96qa LIO8CW8wtN/RG0LWIB7A82XToCvXIOSwKtgPgC5nWniSDuQAQvg4/ThBh771bdZejGCu NcVd2HHwNajCvEOENuzTEAaCw01keQUObs6/NqCZMPp4bZqHyJcM9zw8sm5/4qyJMNrT YRSW1sTUZuvU4fW5XJkZb2RK8m9fQr7tWuvMHnqAGwtXY8MROwSJ9ppYjqL0P+x3MXqr kYBzUYypc4lbzvY6+Rsm6hWgzDNvHlAWUYftr2YBVO0sF/pZNDp4pjKKLvNIn7c4qlfu zTHQ== 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=iBGDBU1LOIu4kx/c1fhVkLNNrKP6X4acltTDNOqXoVA=; b=FfRyLpeTbnXCaDOxLFOqOoYIVk+zv2oEr2c+l2E6vn7t/pdihXgn4AfjtKWohtK1Jk Vz1lGkMBWUX3tqFEQSohCVXeRPpEVXWs72+Q4y4m0oNwwpMvdxZwx43vt2TGrFnixoR1 NMSF4BiOzZquEeh6TJg4jeztTh2ivliL5nmTNWgN2hEYrCv3AJ3M7AZAAVVY+f3IhOvP pgOe+b5YPwxiM/4SSv28FabjZP8p5D4W5wACtOB/fJTa46TXHDo+pZpEOE+Ubo5oK2qS WASxg9LPt1+ZVQyXSyQvtQStsoAs0AMqSOmkn24DK6W2vo0X9NNR6JNSEPGeS962uKks D/yg== X-Gm-Message-State: AO0yUKWbRcjEjRkAE2QF9nY5GQ19wWW1w07bfdFCIIp10GHjkgIKRGkl AniFm4lNofXe3H4sJFYcwEOybboXsFwDc67LyIg= X-Google-Smtp-Source: AK7set+GVwlDnUs++EwriwE30Z1qo5qCKrF5t676sGywGqLg1xgnuh8G6VlA1qLzeHeg1PaCgnkS/w== X-Received: by 2002:a05:6871:b10:b0:162:9d70:2f59 with SMTP id fq16-20020a0568710b1000b001629d702f59mr4209307oab.52.1675361561767; Thu, 02 Feb 2023 10:12:41 -0800 (PST) Received: from mandiga.. ([2804:1b3:a7c2:1887:da12:b9d3:2162:a28c]) by smtp.gmail.com with ESMTPSA id ci10-20020a05683063ca00b00684a10970adsm126689otb.16.2023.02.02.10.12.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Feb 2023 10:12:41 -0800 (PST) From: Adhemerval Zanella To: libc-alpha@sourceware.org, Richard Henderson , Jeff Law , Xi Ruoyao , Noah Goldstein Subject: [PATCH v12 19/31] powerpc: Add string-fza.h Date: Thu, 2 Feb 2023 15:11:37 -0300 Message-Id: <20230202181149.2181553-20-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230202181149.2181553-1-adhemerval.zanella@linaro.org> References: <20230202181149.2181553-1-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. Reviewed-by: Adhemerval Zanella --- sysdeps/powerpc/string-fza.h | 72 ++++++++++++++++++++++++++++++++++++ 1 file changed, 72 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..5dec740041 --- /dev/null +++ b/sysdeps/powerpc/string-fza.h @@ -0,0 +1,72 @@ +/* Zero byte detection; basics. PowerPC 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 + . */ + +#ifndef _POWERPC_STRING_FZA_H +#define _POWERPC_STRING_FZA_H 1 + +/* PowerISA 2.05 (POWER6) provides cmpb instruction. */ +#ifdef _ARCH_PWR6 +# include +# include + +/* The functions return a byte mask. */ +typedef op_t find_t; + +/* This function returns 0xff for each byte that is + equal between X1 and X2. */ + +static __always_inline find_t +find_eq_all (op_t x1, op_t x2) +{ + return __builtin_cmpb (x1, x2); +} + +/* This function returns 0xff for each byte that is zero in X. */ + +static __always_inline find_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 __always_inline find_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 __always_inline find_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