2018-12-21 01:48:04 +00:00
|
|
|
/* The assembly function for memset. C-SKY ABIV2 version.
|
2022-01-01 18:54:23 +00:00
|
|
|
Copyright (C) 2018-2022 Free Software Foundation, Inc.
|
2018-12-21 01:48:04 +00:00
|
|
|
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
|
Prefer https to http for gnu.org and fsf.org URLs
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
2019-09-07 05:40:42 +00:00
|
|
|
<https://www.gnu.org/licenses/>. */
|
2018-12-21 01:48:04 +00:00
|
|
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
|
|
|
|
|
ENTRY (memset)
|
|
|
|
|
/* Test if len less than 4 bytes. */
|
|
|
|
|
mov r12, r0
|
|
|
|
|
cmplti r2, 8
|
|
|
|
|
bt .L_set_by_byte
|
|
|
|
|
|
|
|
|
|
andi r13, r0, 3
|
|
|
|
|
movi r19, 4
|
|
|
|
|
/* Test if dest is not 4 bytes aligned. */
|
|
|
|
|
bnez r13, .L_dest_not_aligned
|
|
|
|
|
/* Hardware can handle unaligned access directly. */
|
|
|
|
|
.L_dest_aligned:
|
|
|
|
|
zextb r1, r1
|
|
|
|
|
mov r3, r1
|
|
|
|
|
lsli r1, 8
|
|
|
|
|
or r1, r3
|
|
|
|
|
lsli r3, r1, 16
|
|
|
|
|
or r3, r1
|
|
|
|
|
|
|
|
|
|
/* If dest is aligned, then copy. */
|
|
|
|
|
zext r18, r2, 31, 4
|
|
|
|
|
/* Test if len less than 16 bytes. */
|
|
|
|
|
bez r18, .L_len_less_16bytes
|
|
|
|
|
|
|
|
|
|
LABLE_ALIGN
|
|
|
|
|
.L_len_larger_16bytes:
|
|
|
|
|
stw r3, (r0, 0)
|
|
|
|
|
stw r3, (r0, 4)
|
|
|
|
|
stw r3, (r0, 8)
|
|
|
|
|
stw r3, (r0, 12)
|
|
|
|
|
PRE_BNEZAD (r18)
|
|
|
|
|
addi r0, 16
|
|
|
|
|
BNEZAD (r18, .L_len_larger_16bytes)
|
|
|
|
|
|
|
|
|
|
.L_len_less_16bytes:
|
|
|
|
|
zext r18, r2, 3, 2
|
|
|
|
|
andi r2, 3
|
|
|
|
|
bez r18, .L_set_by_byte
|
|
|
|
|
.L_len_less_16bytes_loop:
|
|
|
|
|
stw r3, (r0, 0)
|
|
|
|
|
PRE_BNEZAD (r18)
|
|
|
|
|
addi r0, 4
|
|
|
|
|
BNEZAD (r18, .L_len_less_16bytes_loop)
|
|
|
|
|
|
|
|
|
|
/* Test if len less than 4 bytes. */
|
|
|
|
|
.L_set_by_byte:
|
|
|
|
|
zext r18, r2, 2, 0
|
|
|
|
|
bez r18, .L_return
|
|
|
|
|
.L_set_by_byte_loop:
|
|
|
|
|
stb r1, (r0, 0)
|
|
|
|
|
PRE_BNEZAD (r18)
|
|
|
|
|
addi r0, 1
|
|
|
|
|
BNEZAD (r18, .L_set_by_byte_loop)
|
|
|
|
|
|
|
|
|
|
.L_return:
|
|
|
|
|
mov r0, r12
|
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
/* If dest is not aligned, just set some bytes makes the dest
|
|
|
|
|
align. */
|
|
|
|
|
|
|
|
|
|
.L_dest_not_aligned:
|
|
|
|
|
sub r13, r19, r13
|
|
|
|
|
sub r2, r13
|
|
|
|
|
.L_dest_not_aligned_loop:
|
|
|
|
|
/* Makes the dest align. */
|
|
|
|
|
stb r1, (r0, 0)
|
|
|
|
|
PRE_BNEZAD (r13)
|
|
|
|
|
addi r0, 1
|
|
|
|
|
BNEZAD (r13, .L_dest_not_aligned_loop)
|
|
|
|
|
cmplti r2, 8
|
|
|
|
|
bt .L_set_by_byte
|
|
|
|
|
/* Check whether the src is aligned. */
|
|
|
|
|
br .L_dest_aligned
|
|
|
|
|
END (memset)
|
|
|
|
|
|
|
|
|
|
libc_hidden_builtin_def (memset)
|
|
|
|
|
.weak memset
|
