mirror of
https://sourceware.org/git/glibc.git
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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
241 lines
6.7 KiB
ArmAsm
241 lines
6.7 KiB
ArmAsm
/* strcspn (str, ss) -- Return the length of the initial segment of STR
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which contains only characters from SS.
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For Intel 80x86, x>=3.
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Copyright (C) 1994-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>
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Bug fixes by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au>
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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#define PARMS 4 /* no space for saved regs */
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#define STR PARMS
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#define SKIP STR+4
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.text
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ENTRY (strspn)
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movl STR(%esp), %edx
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movl SKIP(%esp), %eax
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/* First we create a table with flags for all possible characters.
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For the ASCII (7bit/8bit) or ISO-8859-X character sets which are
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supported by the C string functions we have 256 characters.
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Before inserting marks for the stop characters we clear the whole
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table. The unrolled form is much faster than a loop. */
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xorl %ecx, %ecx /* %ecx = 0 !!! */
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pushl %ecx /* make a 256 bytes long block filled with 0 */
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl $0 /* These immediate values make the label 2 */
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cfi_adjust_cfa_offset (4)
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pushl $0 /* to be aligned on a 16 byte boundary to */
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cfi_adjust_cfa_offset (4)
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pushl $0 /* get a better performance of the loop. */
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cfi_adjust_cfa_offset (4)
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pushl $0
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cfi_adjust_cfa_offset (4)
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pushl $0
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cfi_adjust_cfa_offset (4)
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pushl $0
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cfi_adjust_cfa_offset (4)
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/* For understanding the following code remember that %ecx == 0 now.
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Although all the following instruction only modify %cl we always
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have a correct zero-extended 32-bit value in %ecx. */
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/* Don't change the "testb $0xff,%%cl" to "testb %%cl,%%cl". We want
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longer instructions so that the next loop aligns without adding nops. */
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L(2): movb (%eax), %cl /* get byte from stopset */
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testb %cl, %cl /* is NUL char? */
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jz L(1) /* yes => start compare loop */
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movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
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movb 1(%eax), %cl /* get byte from stopset */
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testb $0xff, %cl /* is NUL char? */
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jz L(1) /* yes => start compare loop */
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movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
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movb 2(%eax), %cl /* get byte from stopset */
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testb $0xff, %cl /* is NUL char? */
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jz L(1) /* yes => start compare loop */
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movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
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movb 3(%eax), %cl /* get byte from stopset */
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addl $4, %eax /* increment stopset pointer */
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movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
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testb $0xff, %cl /* is NUL char? */
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jnz L(2) /* no => process next dword from stopset */
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L(1): leal -4(%edx), %eax /* prepare loop */
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/* We use a neat trick for the following loop. Normally we would
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have to test for two termination conditions
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1. a character in the stopset was found
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and
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2. the end of the string was found
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But as a sign that the character is in the stopset we store its
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value in the table. But the value of NUL is NUL so the loop
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terminates for NUL in every case. */
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L(3): addl $4, %eax /* adjust pointer for full loop round */
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movb (%eax), %cl /* get byte from string */
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testb %cl, (%esp,%ecx) /* is it contained in skipset? */
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jz L(4) /* no => return */
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movb 1(%eax), %cl /* get byte from string */
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testb %cl, (%esp,%ecx) /* is it contained in skipset? */
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jz L(5) /* no => return */
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movb 2(%eax), %cl /* get byte from string */
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testb %cl, (%esp,%ecx) /* is it contained in skipset? */
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jz L(6) /* no => return */
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movb 3(%eax), %cl /* get byte from string */
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testb %cl, (%esp,%ecx) /* is it contained in skipset? */
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jnz L(3) /* yes => start loop again */
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incl %eax /* adjust pointer */
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L(6): incl %eax
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L(5): incl %eax
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L(4): addl $256, %esp /* remove stopset */
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cfi_adjust_cfa_offset (-256)
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subl %edx, %eax /* we have to return the number of valid
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characters, so compute distance to first
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non-valid character */
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ret
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END (strspn)
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libc_hidden_builtin_def (strspn)
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