mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 09:40:13 +00:00
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
400 lines
6.3 KiB
ArmAsm
400 lines
6.3 KiB
ArmAsm
/* Optimized memset implementation for PowerPC64/POWER7.
|
|
Copyright (C) 2010-2019 Free Software Foundation, Inc.
|
|
Contributed by Luis Machado <luisgpm@br.ibm.com>.
|
|
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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* void * [r3] memset (void *s [r3], int c [r4], size_t n [r5]));
|
|
Returns 's'. */
|
|
|
|
#ifndef MEMSET
|
|
# define MEMSET memset
|
|
#endif
|
|
.machine power7
|
|
ENTRY_TOCLESS (MEMSET, 5)
|
|
CALL_MCOUNT 3
|
|
|
|
L(_memset):
|
|
cmpldi cr7,5,31
|
|
cmpldi cr6,5,8
|
|
mr 10,3
|
|
|
|
/* Replicate byte to word. */
|
|
insrdi 4,4,8,48
|
|
insrdi 4,4,16,32
|
|
ble cr6,L(small) /* If length <= 8, use short copy code. */
|
|
|
|
neg 0,3
|
|
ble cr7,L(medium) /* If length < 32, use medium copy code. */
|
|
|
|
andi. 11,10,7 /* Check alignment of SRC. */
|
|
insrdi 4,4,32,0 /* Replicate word to double word. */
|
|
|
|
mr 12,5
|
|
beq L(big_aligned)
|
|
|
|
clrldi 0,0,61
|
|
mtocrf 0x01,0
|
|
subf 5,0,5
|
|
|
|
/* Get DST aligned to 8 bytes. */
|
|
1: bf 31,2f
|
|
|
|
stb 4,0(10)
|
|
addi 10,10,1
|
|
2: bf 30,4f
|
|
|
|
sth 4,0(10)
|
|
addi 10,10,2
|
|
4: bf 29,L(big_aligned)
|
|
|
|
stw 4,0(10)
|
|
addi 10,10,4
|
|
|
|
.align 4
|
|
L(big_aligned):
|
|
|
|
cmpldi cr5,5,255
|
|
li 0,32
|
|
dcbtst 0,10
|
|
cmpldi cr6,4,0
|
|
srdi 9,5,3 /* Number of full doublewords remaining. */
|
|
crand 27,26,21
|
|
mtocrf 0x01,9
|
|
bt 27,L(huge)
|
|
|
|
/* From this point on, we'll copy 32+ bytes and the value
|
|
isn't 0 (so we can't use dcbz). */
|
|
|
|
srdi 8,5,5
|
|
clrldi 11,5,61
|
|
cmpldi cr6,11,0
|
|
cmpldi cr1,9,4
|
|
mtctr 8
|
|
|
|
/* Copy 1~3 doublewords so the main loop starts
|
|
at a multiple of 32 bytes. */
|
|
|
|
bf 30,1f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
addi 10,10,16
|
|
bf 31,L(big_loop)
|
|
|
|
std 4,0(10)
|
|
addi 10,10,8
|
|
mr 12,10
|
|
blt cr1,L(tail_bytes)
|
|
b L(big_loop)
|
|
|
|
.align 4
|
|
1: /* Copy 1 doubleword. */
|
|
bf 31,L(big_loop)
|
|
|
|
std 4,0(10)
|
|
addi 10,10,8
|
|
|
|
/* Main aligned copy loop. Copies 32-bytes at a time and
|
|
ping-pong through r10 and r12 to avoid AGEN delays. */
|
|
.align 4
|
|
L(big_loop):
|
|
addi 12,10,32
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
std 4,16(10)
|
|
std 4,24(10)
|
|
bdz L(tail_bytes)
|
|
|
|
addi 10,10,64
|
|
std 4,0(12)
|
|
std 4,8(12)
|
|
std 4,16(12)
|
|
std 4,24(12)
|
|
bdnz L(big_loop)
|
|
|
|
mr 12,10
|
|
b L(tail_bytes)
|
|
|
|
.align 4
|
|
L(tail_bytes):
|
|
|
|
/* Check for tail bytes. */
|
|
beqlr cr6
|
|
|
|
clrldi 0,5,61
|
|
mtocrf 0x01,0
|
|
|
|
/* At this point we have a tail of 0-7 bytes and we know that the
|
|
destination is doubleword-aligned. */
|
|
4: /* Copy 4 bytes. */
|
|
bf 29,2f
|
|
|
|
stw 4,0(12)
|
|
addi 12,12,4
|
|
2: /* Copy 2 bytes. */
|
|
bf 30,1f
|
|
|
|
sth 4,0(12)
|
|
addi 12,12,2
|
|
1: /* Copy 1 byte. */
|
|
bflr 31
|
|
|
|
stb 4,0(12)
|
|
blr
|
|
|
|
/* Special case when value is 0 and we have a long length to deal
|
|
with. Use dcbz to zero out 128-bytes at a time. Before using
|
|
dcbz though, we need to get the destination 128-bytes aligned. */
|
|
.align 4
|
|
L(huge):
|
|
andi. 11,10,127
|
|
neg 0,10
|
|
beq L(huge_aligned)
|
|
|
|
clrldi 0,0,57
|
|
subf 5,0,5
|
|
srdi 0,0,3
|
|
mtocrf 0x01,0
|
|
|
|
/* Get DST aligned to 128 bytes. */
|
|
8: bf 28,4f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
std 4,16(10)
|
|
std 4,24(10)
|
|
std 4,32(10)
|
|
std 4,40(10)
|
|
std 4,48(10)
|
|
std 4,56(10)
|
|
addi 10,10,64
|
|
.align 4
|
|
4: bf 29,2f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
std 4,16(10)
|
|
std 4,24(10)
|
|
addi 10,10,32
|
|
.align 4
|
|
2: bf 30,1f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
addi 10,10,16
|
|
.align 4
|
|
1: bf 31,L(huge_aligned)
|
|
|
|
std 4,0(10)
|
|
addi 10,10,8
|
|
|
|
|
|
L(huge_aligned):
|
|
srdi 8,5,7
|
|
clrldi 11,5,57
|
|
cmpldi cr6,11,0
|
|
mtctr 8
|
|
|
|
.align 4
|
|
L(huge_loop):
|
|
dcbz 0,10
|
|
addi 10,10,128
|
|
bdnz L(huge_loop)
|
|
|
|
/* Check how many bytes are still left. */
|
|
beqlr cr6
|
|
|
|
subf 9,3,10
|
|
subf 5,9,12
|
|
srdi 8,5,3
|
|
cmpldi cr6,8,0
|
|
mtocrf 0x01,8
|
|
|
|
/* We have a tail o 1~127 bytes. Copy up to 15 doublewords for
|
|
speed. We'll handle the resulting tail bytes later. */
|
|
beq cr6,L(tail)
|
|
|
|
8: bf 28,4f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
std 4,16(10)
|
|
std 4,24(10)
|
|
std 4,32(10)
|
|
std 4,40(10)
|
|
std 4,48(10)
|
|
std 4,56(10)
|
|
addi 10,10,64
|
|
.align 4
|
|
4: bf 29,2f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
std 4,16(10)
|
|
std 4,24(10)
|
|
addi 10,10,32
|
|
.align 4
|
|
2: bf 30,1f
|
|
|
|
std 4,0(10)
|
|
std 4,8(10)
|
|
addi 10,10,16
|
|
.align 4
|
|
1: bf 31,L(tail)
|
|
|
|
std 4,0(10)
|
|
addi 10,10,8
|
|
|
|
/* Handle the rest of the tail bytes here. */
|
|
L(tail):
|
|
mtocrf 0x01,5
|
|
|
|
.align 4
|
|
4: bf 29,2f
|
|
|
|
stw 4,0(10)
|
|
addi 10,10,4
|
|
.align 4
|
|
2: bf 30,1f
|
|
|
|
sth 4,0(10)
|
|
addi 10,10,2
|
|
.align 4
|
|
1: bflr 31
|
|
|
|
stb 4,0(10)
|
|
blr
|
|
|
|
/* Expanded tree to copy tail bytes without increments. */
|
|
.align 4
|
|
L(copy_tail):
|
|
bf 29,L(FXX)
|
|
|
|
stw 4,0(10)
|
|
bf 30,L(TFX)
|
|
|
|
sth 4,4(10)
|
|
bflr 31
|
|
|
|
stb 4,6(10)
|
|
blr
|
|
|
|
.align 4
|
|
L(FXX): bf 30,L(FFX)
|
|
|
|
sth 4,0(10)
|
|
bflr 31
|
|
|
|
stb 4,2(10)
|
|
blr
|
|
|
|
.align 4
|
|
L(TFX): bflr 31
|
|
|
|
stb 4,4(10)
|
|
blr
|
|
|
|
.align 4
|
|
L(FFX): bflr 31
|
|
|
|
stb 4,0(10)
|
|
blr
|
|
|
|
/* Handle copies of 9~31 bytes. */
|
|
.align 4
|
|
L(medium):
|
|
/* At least 9 bytes to go. */
|
|
andi. 11,10,3
|
|
clrldi 0,0,62
|
|
beq L(medium_aligned)
|
|
|
|
/* Force 4-bytes alignment for DST. */
|
|
mtocrf 0x01,0
|
|
subf 5,0,5
|
|
1: /* Copy 1 byte. */
|
|
bf 31,2f
|
|
|
|
stb 4,0(10)
|
|
addi 10,10,1
|
|
2: /* Copy 2 bytes. */
|
|
bf 30,L(medium_aligned)
|
|
|
|
sth 4,0(10)
|
|
addi 10,10,2
|
|
|
|
.align 4
|
|
L(medium_aligned):
|
|
/* At least 6 bytes to go, and DST is word-aligned. */
|
|
cmpldi cr1,5,16
|
|
mtocrf 0x01,5
|
|
blt cr1,8f
|
|
|
|
/* Copy 16 bytes. */
|
|
stw 4,0(10)
|
|
stw 4,4(10)
|
|
stw 4,8(10)
|
|
stw 4,12(10)
|
|
addi 10,10,16
|
|
8: /* Copy 8 bytes. */
|
|
bf 28,4f
|
|
|
|
stw 4,0(10)
|
|
stw 4,4(10)
|
|
addi 10,10,8
|
|
4: /* Copy 4 bytes. */
|
|
bf 29,2f
|
|
|
|
stw 4,0(10)
|
|
addi 10,10,4
|
|
2: /* Copy 2-3 bytes. */
|
|
bf 30,1f
|
|
|
|
sth 4,0(10)
|
|
addi 10,10,2
|
|
1: /* Copy 1 byte. */
|
|
bflr 31
|
|
|
|
stb 4,0(10)
|
|
blr
|
|
|
|
/* Handles copies of 0~8 bytes. */
|
|
.align 4
|
|
L(small):
|
|
mtocrf 0x01,5
|
|
bne cr6,L(copy_tail)
|
|
|
|
stw 4,0(10)
|
|
stw 4,4(10)
|
|
blr
|
|
|
|
END_GEN_TB (MEMSET,TB_TOCLESS)
|
|
libc_hidden_builtin_def (memset)
|
|
|
|
/* Copied from bzero.S to prevent the linker from inserting a stub
|
|
between bzero and memset. */
|
|
ENTRY_TOCLESS (__bzero)
|
|
CALL_MCOUNT 3
|
|
mr r5,r4
|
|
li r4,0
|
|
b L(_memset)
|
|
END (__bzero)
|
|
#ifndef __bzero
|
|
weak_alias (__bzero, bzero)
|
|
#endif
|