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
98 lines
2.8 KiB
ArmAsm
98 lines
2.8 KiB
ArmAsm
/* Optimized version of the standard strlen() function.
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This file is part of the GNU C Library.
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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Contributed by Dan Pop <Dan.Pop@cern.ch>.
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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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/* Return: the length of the input string
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Input:
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in0: str
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Look for the null character byte by byte, until we reach a word aligned
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address, then search word by word, using the czx instruction. We're
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also doing one word of read ahead, which could cause problems if the
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null character is on the last word of a page and the next page is not
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mapped in the process address space. Hence the use of the speculative
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load.
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This implementation assumes little endian mode. For big endian mode,
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the instruction czx1.r should be replaced by czx1.l. */
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#include <sysdep.h>
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#undef ret
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#define saved_lc r18
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#define str r19
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#define pos0 r20
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#define val1 r21
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#define val2 r22
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#define origadd r23
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#define tmp r24
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#define loopcnt r30
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#define len ret0
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ENTRY(strlen)
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.prologue
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alloc r2 = ar.pfs, 1, 0, 0, 0
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.save ar.lc, saved_lc
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mov saved_lc = ar.lc // save the loop counter
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.body
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mov str = in0
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mov len = r0 // len = 0
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and tmp = 7, in0 // tmp = str % 8
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;;
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sub loopcnt = 8, tmp // loopcnt = 8 - tmp
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cmp.eq p6, p0 = tmp, r0
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(p6) br.cond.sptk .str_aligned;;
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adds loopcnt = -1, loopcnt;;
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mov ar.lc = loopcnt
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.l1:
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ld1 val2 = [str], 1
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;;
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cmp.eq p6, p0 = val2, r0
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(p6) br.cond.spnt .restore_and_exit
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adds len = 1, len
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br.cloop.dptk .l1
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.str_aligned:
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mov origadd = str // origadd = orig
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ld8 val1 = [str], 8;;
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nop.b 0
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nop.b 0
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.l2: ld8.s val2 = [str], 8 // don't bomb out here
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czx1.r pos0 = val1
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;;
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cmp.ne p6, p0 = 8, pos0
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(p6) br.cond.spnt .foundit
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chk.s val2, .recovery
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.back:
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mov val1 = val2
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br.cond.dptk .l2
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.foundit:
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sub tmp = str, origadd // tmp = crt address - orig
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add len = len, pos0;;
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add len = len, tmp;;
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adds len = -16, len
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.restore_and_exit:
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mov ar.lc = saved_lc // restore the loop counter
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br.ret.sptk.many b0
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.recovery:
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adds str = -8, str;;
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ld8 val2 = [str], 8 // bomb out here
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br.cond.sptk .back
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END(strlen)
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libc_hidden_builtin_def (strlen)
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