mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
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
360 lines
6.6 KiB
ArmAsm
360 lines
6.6 KiB
ArmAsm
/* memrchr optimized with AVX2.
|
|
Copyright (C) 2017-2019 Free Software Foundation, Inc.
|
|
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/>. */
|
|
|
|
#if IS_IN (libc)
|
|
|
|
# include <sysdep.h>
|
|
|
|
# ifndef VZEROUPPER
|
|
# define VZEROUPPER vzeroupper
|
|
# endif
|
|
|
|
# define VEC_SIZE 32
|
|
|
|
.section .text.avx,"ax",@progbits
|
|
ENTRY (__memrchr_avx2)
|
|
/* Broadcast CHAR to YMM0. */
|
|
vmovd %esi, %xmm0
|
|
vpbroadcastb %xmm0, %ymm0
|
|
|
|
sub $VEC_SIZE, %RDX_LP
|
|
jbe L(last_vec_or_less)
|
|
|
|
add %RDX_LP, %RDI_LP
|
|
|
|
/* Check the last VEC_SIZE bytes. */
|
|
vpcmpeqb (%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x0)
|
|
|
|
subq $(VEC_SIZE * 4), %rdi
|
|
movl %edi, %ecx
|
|
andl $(VEC_SIZE - 1), %ecx
|
|
jz L(aligned_more)
|
|
|
|
/* Align data for aligned loads in the loop. */
|
|
addq $VEC_SIZE, %rdi
|
|
addq $VEC_SIZE, %rdx
|
|
andq $-VEC_SIZE, %rdi
|
|
subq %rcx, %rdx
|
|
|
|
.p2align 4
|
|
L(aligned_more):
|
|
subq $(VEC_SIZE * 4), %rdx
|
|
jbe L(last_4x_vec_or_less)
|
|
|
|
/* Check the last 4 * VEC_SIZE. Only one VEC_SIZE at a time
|
|
since data is only aligned to VEC_SIZE. */
|
|
vpcmpeqb (VEC_SIZE * 3)(%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x3)
|
|
|
|
vpcmpeqb (VEC_SIZE * 2)(%rdi), %ymm0, %ymm2
|
|
vpmovmskb %ymm2, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x2)
|
|
|
|
vpcmpeqb VEC_SIZE(%rdi), %ymm0, %ymm3
|
|
vpmovmskb %ymm3, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x1)
|
|
|
|
vpcmpeqb (%rdi), %ymm0, %ymm4
|
|
vpmovmskb %ymm4, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x0)
|
|
|
|
/* Align data to 4 * VEC_SIZE for loop with fewer branches.
|
|
There are some overlaps with above if data isn't aligned
|
|
to 4 * VEC_SIZE. */
|
|
movl %edi, %ecx
|
|
andl $(VEC_SIZE * 4 - 1), %ecx
|
|
jz L(loop_4x_vec)
|
|
|
|
addq $(VEC_SIZE * 4), %rdi
|
|
addq $(VEC_SIZE * 4), %rdx
|
|
andq $-(VEC_SIZE * 4), %rdi
|
|
subq %rcx, %rdx
|
|
|
|
.p2align 4
|
|
L(loop_4x_vec):
|
|
/* Compare 4 * VEC at a time forward. */
|
|
subq $(VEC_SIZE * 4), %rdi
|
|
subq $(VEC_SIZE * 4), %rdx
|
|
jbe L(last_4x_vec_or_less)
|
|
|
|
vmovdqa (%rdi), %ymm1
|
|
vmovdqa VEC_SIZE(%rdi), %ymm2
|
|
vmovdqa (VEC_SIZE * 2)(%rdi), %ymm3
|
|
vmovdqa (VEC_SIZE * 3)(%rdi), %ymm4
|
|
|
|
vpcmpeqb %ymm1, %ymm0, %ymm1
|
|
vpcmpeqb %ymm2, %ymm0, %ymm2
|
|
vpcmpeqb %ymm3, %ymm0, %ymm3
|
|
vpcmpeqb %ymm4, %ymm0, %ymm4
|
|
|
|
vpor %ymm1, %ymm2, %ymm5
|
|
vpor %ymm3, %ymm4, %ymm6
|
|
vpor %ymm5, %ymm6, %ymm5
|
|
|
|
vpmovmskb %ymm5, %eax
|
|
testl %eax, %eax
|
|
jz L(loop_4x_vec)
|
|
|
|
/* There is a match. */
|
|
vpmovmskb %ymm4, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x3)
|
|
|
|
vpmovmskb %ymm3, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x2)
|
|
|
|
vpmovmskb %ymm2, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x1)
|
|
|
|
vpmovmskb %ymm1, %eax
|
|
bsrl %eax, %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_4x_vec_or_less):
|
|
addl $(VEC_SIZE * 4), %edx
|
|
cmpl $(VEC_SIZE * 2), %edx
|
|
jbe L(last_2x_vec)
|
|
|
|
vpcmpeqb (VEC_SIZE * 3)(%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x3)
|
|
|
|
vpcmpeqb (VEC_SIZE * 2)(%rdi), %ymm0, %ymm2
|
|
vpmovmskb %ymm2, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x2)
|
|
|
|
vpcmpeqb VEC_SIZE(%rdi), %ymm0, %ymm3
|
|
vpmovmskb %ymm3, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x1_check)
|
|
cmpl $(VEC_SIZE * 3), %edx
|
|
jbe L(zero)
|
|
|
|
vpcmpeqb (%rdi), %ymm0, %ymm4
|
|
vpmovmskb %ymm4, %eax
|
|
testl %eax, %eax
|
|
jz L(zero)
|
|
bsrl %eax, %eax
|
|
subq $(VEC_SIZE * 4), %rdx
|
|
addq %rax, %rdx
|
|
jl L(zero)
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_2x_vec):
|
|
vpcmpeqb (VEC_SIZE * 3)(%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x3_check)
|
|
cmpl $VEC_SIZE, %edx
|
|
jbe L(zero)
|
|
|
|
vpcmpeqb (VEC_SIZE * 2)(%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
testl %eax, %eax
|
|
jz L(zero)
|
|
bsrl %eax, %eax
|
|
subq $(VEC_SIZE * 2), %rdx
|
|
addq %rax, %rdx
|
|
jl L(zero)
|
|
addl $(VEC_SIZE * 2), %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x0):
|
|
bsrl %eax, %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x1):
|
|
bsrl %eax, %eax
|
|
addl $VEC_SIZE, %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x2):
|
|
bsrl %eax, %eax
|
|
addl $(VEC_SIZE * 2), %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x3):
|
|
bsrl %eax, %eax
|
|
addl $(VEC_SIZE * 3), %eax
|
|
addq %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x1_check):
|
|
bsrl %eax, %eax
|
|
subq $(VEC_SIZE * 3), %rdx
|
|
addq %rax, %rdx
|
|
jl L(zero)
|
|
addl $VEC_SIZE, %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_x3_check):
|
|
bsrl %eax, %eax
|
|
subq $VEC_SIZE, %rdx
|
|
addq %rax, %rdx
|
|
jl L(zero)
|
|
addl $(VEC_SIZE * 3), %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(zero):
|
|
VZEROUPPER
|
|
L(null):
|
|
xorl %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_or_less_aligned):
|
|
movl %edx, %ecx
|
|
|
|
vpcmpeqb (%rdi), %ymm0, %ymm1
|
|
|
|
movl $1, %edx
|
|
/* Support rdx << 32. */
|
|
salq %cl, %rdx
|
|
subq $1, %rdx
|
|
|
|
vpmovmskb %ymm1, %eax
|
|
|
|
/* Remove the trailing bytes. */
|
|
andl %edx, %eax
|
|
testl %eax, %eax
|
|
jz L(zero)
|
|
|
|
bsrl %eax, %eax
|
|
addq %rdi, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_or_less):
|
|
addl $VEC_SIZE, %edx
|
|
|
|
/* Check for zero length. */
|
|
testl %edx, %edx
|
|
jz L(null)
|
|
|
|
movl %edi, %ecx
|
|
andl $(VEC_SIZE - 1), %ecx
|
|
jz L(last_vec_or_less_aligned)
|
|
|
|
movl %ecx, %esi
|
|
movl %ecx, %r8d
|
|
addl %edx, %esi
|
|
andq $-VEC_SIZE, %rdi
|
|
|
|
subl $VEC_SIZE, %esi
|
|
ja L(last_vec_2x_aligned)
|
|
|
|
/* Check the last VEC. */
|
|
vpcmpeqb (%rdi), %ymm0, %ymm1
|
|
vpmovmskb %ymm1, %eax
|
|
|
|
/* Remove the leading and trailing bytes. */
|
|
sarl %cl, %eax
|
|
movl %edx, %ecx
|
|
|
|
movl $1, %edx
|
|
sall %cl, %edx
|
|
subl $1, %edx
|
|
|
|
andl %edx, %eax
|
|
testl %eax, %eax
|
|
jz L(zero)
|
|
|
|
bsrl %eax, %eax
|
|
addq %rdi, %rax
|
|
addq %r8, %rax
|
|
VZEROUPPER
|
|
ret
|
|
|
|
.p2align 4
|
|
L(last_vec_2x_aligned):
|
|
movl %esi, %ecx
|
|
|
|
/* Check the last VEC. */
|
|
vpcmpeqb VEC_SIZE(%rdi), %ymm0, %ymm1
|
|
|
|
movl $1, %edx
|
|
sall %cl, %edx
|
|
subl $1, %edx
|
|
|
|
vpmovmskb %ymm1, %eax
|
|
|
|
/* Remove the trailing bytes. */
|
|
andl %edx, %eax
|
|
|
|
testl %eax, %eax
|
|
jnz L(last_vec_x1)
|
|
|
|
/* Check the second last VEC. */
|
|
vpcmpeqb (%rdi), %ymm0, %ymm1
|
|
|
|
movl %r8d, %ecx
|
|
|
|
vpmovmskb %ymm1, %eax
|
|
|
|
/* Remove the leading bytes. Must use unsigned right shift for
|
|
bsrl below. */
|
|
shrl %cl, %eax
|
|
testl %eax, %eax
|
|
jz L(zero)
|
|
|
|
bsrl %eax, %eax
|
|
addq %rdi, %rax
|
|
addq %r8, %rax
|
|
VZEROUPPER
|
|
ret
|
|
END (__memrchr_avx2)
|
|
#endif
|