From patchwork Wed Dec 21 23:06:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 18631 X-Patchwork-Delegate: tuliom@linux.vnet.ibm.com Received: (qmail 52929 invoked by alias); 21 Dec 2016 23:06:35 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 52469 invoked by uid 89); 21 Dec 2016 23:06:30 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.1 required=5.0 tests=BAYES_00, FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, RCVD_IN_SORBS_SPAM, SPF_PASS autolearn=no version=3.3.2 spammy=Identify, Hx-spam-relays-external:74.125.83.68, H*RU:74.125.83.68 X-HELO: mail-pg0-f68.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:subject:date:message-id :in-reply-to:references; bh=kdy9NmmQ5qbO/+iDzQuNif129jhFhyhmukHPUJuTxTc=; b=mZuNgbWRhcoCgocUJC/eC/cofyrkXbrn777/RI88NJ6M2XDVpjfERKCvojLB4lSZD3 WZpCDOi/wRNDTbnVW0lgGCnN7sSjE9gC6zAaBQKifOabJpwqcZUZj0iIg4dLzdfggrU2 rjB0s5jJaCMezXpODxnWI9ZTWjuNn2IVtj6IIebTnk+nwvFl62zg2K802ebgWAk/ZbUR qFGPfwBuBP4NtMS49Lf0iQrt7PgwuDkkfTYVag1cKhy+/Fj+vQCZYOQVr7VHf7r0hfDj iuu6kopQHMqRIg5TDMH8E1hjxPPxCVqO0ucD7bA5Mq5rdJEvwXhyNm6IhQgyWVjAniIo ZwRg== X-Gm-Message-State: AIkVDXLfSV5QlfCyEpBeVw8FwKQJfXHaaZ5bxbeAWrx9o1VCS7W4bbJOhvqDyDGdBGCRhQ== X-Received: by 10.84.215.130 with SMTP id l2mr3181472pli.121.1482361581654; Wed, 21 Dec 2016 15:06:21 -0800 (PST) From: Richard Henderson To: libc-alpha@sourceware.org Subject: [PATCH v2 16/16] powerpc: Add string-fza.h Date: Wed, 21 Dec 2016 15:06:05 -0800 Message-Id: <20161221230605.28638-17-rth@twiddle.net> In-Reply-To: <20161221230605.28638-1-rth@twiddle.net> References: <20161221230605.28638-1-rth@twiddle.net> 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. * sysdeps/powerpc/power6/string-fza.h: New file. * sysdeps/powerpc/powerpc32/power6/string-fza.h: New file. * sysdeps/powerpc/powerpc64/power6/string-fza.h: New file. --- sysdeps/powerpc/power6/string-fza.h | 65 +++++++++++++++++++++++++++ sysdeps/powerpc/powerpc32/power6/string-fza.h | 1 + sysdeps/powerpc/powerpc64/power6/string-fza.h | 1 + 3 files changed, 67 insertions(+) create mode 100644 sysdeps/powerpc/power6/string-fza.h create mode 100644 sysdeps/powerpc/powerpc32/power6/string-fza.h create mode 100644 sysdeps/powerpc/powerpc64/power6/string-fza.h diff --git a/sysdeps/powerpc/power6/string-fza.h b/sysdeps/powerpc/power6/string-fza.h new file mode 100644 index 0000000..1515b00 --- /dev/null +++ b/sysdeps/powerpc/power6/string-fza.h @@ -0,0 +1,65 @@ +/* string-fza.h -- zero byte detection; basics. Power6 version. + Copyright (C) 2016 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 STRING_FZA_H +#define STRING_FZA_H 1 + +#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 + +#endif /* STRING_FZA_H */ diff --git a/sysdeps/powerpc/powerpc32/power6/string-fza.h b/sysdeps/powerpc/powerpc32/power6/string-fza.h new file mode 100644 index 0000000..bb00d7c --- /dev/null +++ b/sysdeps/powerpc/powerpc32/power6/string-fza.h @@ -0,0 +1 @@ +#include diff --git a/sysdeps/powerpc/powerpc64/power6/string-fza.h b/sysdeps/powerpc/powerpc64/power6/string-fza.h new file mode 100644 index 0000000..bb00d7c --- /dev/null +++ b/sysdeps/powerpc/powerpc64/power6/string-fza.h @@ -0,0 +1 @@ +#include