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
143 lines
2.9 KiB
ArmAsm
143 lines
2.9 KiB
ArmAsm
/* The assembly function for memory compare. C-SKY ABIV2 version.
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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ENTRY (memcmp)
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/* Test if len less than 4 bytes. */
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mov r3, r0
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movi r0, 0
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mov r12, r4
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cmplti r2, 4
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jbt .L_compare_by_byte
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andi r13, r0, 3
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movi r19, 4
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/* Test if s1 is not 4 bytes aligned. */
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bnez r13, .L_s1_not_aligned
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LABLE_ALIGN
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.L_s1_aligned:
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/* If dest is aligned, then copy. */
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zext r18, r2, 31, 4
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/* Test if len less than 16 bytes. */
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bez r18, .L_compare_by_word
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.L_compare_by_4word:
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/* If aligned, load word each time. */
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ldw r20, (r3, 0)
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ldw r21, (r1, 0)
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/* If s1[i] != s2[i], goto .L_byte_check. */
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cmpne r20, r21
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bt .L_byte_check
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ldw r20, (r3, 4)
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ldw r21, (r1, 4)
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cmpne r20, r21
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bt .L_byte_check
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ldw r20, (r3, 8)
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ldw r21, (r1, 8)
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cmpne r20, r21
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bt .L_byte_check
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ldw r20, (r3, 12)
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ldw r21, (r1, 12)
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cmpne r20, r21
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bt .L_byte_check
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PRE_BNEZAD (r18)
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addi a3, 16
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addi a1, 16
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BNEZAD (r18, .L_compare_by_4word)
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.L_compare_by_word:
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zext r18, r2, 3, 2
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bez r18, .L_compare_by_byte
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.L_compare_by_word_loop:
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ldw r20, (r3, 0)
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ldw r21, (r1, 0)
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addi r3, 4
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PRE_BNEZAD (r18)
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cmpne r20, r21
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addi r1, 4
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bt .L_byte_check
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BNEZAD (r18, .L_compare_by_word_loop)
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.L_compare_by_byte:
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zext r18, r2, 1, 0
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bez r18, .L_return
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.L_compare_by_byte_loop:
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ldb r0, (r3, 0)
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ldb r4, (r1, 0)
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addi r3, 1
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subu r0, r4
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PRE_BNEZAD (r18)
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addi r1, 1
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bnez r0, .L_return
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BNEZAD (r18, .L_compare_by_byte_loop)
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.L_return:
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mov r4, r12
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rts
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/* s1[i] != s2[i] in word, so we check byte 3. */
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.L_byte_check:
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xtrb3 r0, r20
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xtrb3 r2, r21
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subu r0, r2
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bnez r0, .L_return
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/* check byte 2 */
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xtrb2 r0, r20
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xtrb2 r2, r21
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subu r0, r2
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bnez r0, .L_return
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/* check byte 1 */
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xtrb1 r0, r20
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xtrb1 r2, r21
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subu r0, r2
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bnez r0, .L_return
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/* check byte 0 */
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xtrb0 r0, r20
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xtrb0 r2, r21
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subu r0, r2
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br .L_return
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/* Compare when s1 is not aligned. */
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.L_s1_not_aligned:
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sub r13, r19, r13
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sub r2, r13
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.L_s1_not_aligned_loop:
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ldb r0, (r3, 0)
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ldb r4, (r1, 0)
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addi r3, 1
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subu r0, r4
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PRE_BNEZAD (r13)
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addi r1, 1
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bnez r0, .L_return
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BNEZAD (r13, .L_s1_not_aligned_loop)
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br .L_s1_aligned
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END (memcmp)
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weak_alias (memcmp, bcmp)
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libc_hidden_def (memcmp)
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.weak memcmp
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