mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +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
363 lines
7.1 KiB
ArmAsm
363 lines
7.1 KiB
ArmAsm
/* memcmp with SSE2
|
|
Copyright (C) 2009-2019 Free Software Foundation, Inc.
|
|
Contributed by Intel Corporation.
|
|
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>
|
|
|
|
.text
|
|
ENTRY (memcmp)
|
|
#ifdef __ILP32__
|
|
/* Clear the upper 32 bits. */
|
|
movl %edx, %edx
|
|
#endif
|
|
test %RDX_LP, %RDX_LP
|
|
jz L(finz)
|
|
cmpq $1, %rdx
|
|
jbe L(finr1b)
|
|
subq %rdi, %rsi
|
|
movq %rdx, %r10
|
|
cmpq $32, %r10
|
|
jae L(gt32)
|
|
/* Handle small chunks and last block of less than 32 bytes. */
|
|
L(small):
|
|
testq $1, %r10
|
|
jz L(s2b)
|
|
movzbl (%rdi), %eax
|
|
movzbl (%rdi, %rsi), %edx
|
|
subq $1, %r10
|
|
je L(finz1)
|
|
addq $1, %rdi
|
|
subl %edx, %eax
|
|
jnz L(exit)
|
|
L(s2b):
|
|
testq $2, %r10
|
|
jz L(s4b)
|
|
movzwl (%rdi), %eax
|
|
movzwl (%rdi, %rsi), %edx
|
|
subq $2, %r10
|
|
je L(fin2_7)
|
|
addq $2, %rdi
|
|
cmpl %edx, %eax
|
|
jnz L(fin2_7)
|
|
L(s4b):
|
|
testq $4, %r10
|
|
jz L(s8b)
|
|
movl (%rdi), %eax
|
|
movl (%rdi, %rsi), %edx
|
|
subq $4, %r10
|
|
je L(fin2_7)
|
|
addq $4, %rdi
|
|
cmpl %edx, %eax
|
|
jnz L(fin2_7)
|
|
L(s8b):
|
|
testq $8, %r10
|
|
jz L(s16b)
|
|
movq (%rdi), %rax
|
|
movq (%rdi, %rsi), %rdx
|
|
subq $8, %r10
|
|
je L(fin2_7)
|
|
addq $8, %rdi
|
|
cmpq %rdx, %rax
|
|
jnz L(fin2_7)
|
|
L(s16b):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
xorl %eax, %eax
|
|
subl $0xffff, %edx
|
|
jz L(finz)
|
|
bsfl %edx, %ecx
|
|
leaq (%rdi, %rcx), %rcx
|
|
movzbl (%rcx), %eax
|
|
movzbl (%rsi, %rcx), %edx
|
|
jmp L(finz1)
|
|
|
|
.p2align 4,, 4
|
|
L(finr1b):
|
|
movzbl (%rdi), %eax
|
|
movzbl (%rsi), %edx
|
|
L(finz1):
|
|
subl %edx, %eax
|
|
L(exit):
|
|
ret
|
|
|
|
.p2align 4,, 4
|
|
L(fin2_7):
|
|
cmpq %rdx, %rax
|
|
jz L(finz)
|
|
movq %rax, %r11
|
|
subq %rdx, %r11
|
|
bsfq %r11, %rcx
|
|
sarq $3, %rcx
|
|
salq $3, %rcx
|
|
sarq %cl, %rax
|
|
movzbl %al, %eax
|
|
sarq %cl, %rdx
|
|
movzbl %dl, %edx
|
|
subl %edx, %eax
|
|
ret
|
|
|
|
.p2align 4,, 4
|
|
L(finz):
|
|
xorl %eax, %eax
|
|
ret
|
|
|
|
/* For blocks bigger than 32 bytes
|
|
1. Advance one of the addr pointer to be 16B aligned.
|
|
2. Treat the case of both addr pointers aligned to 16B
|
|
separately to avoid movdqu.
|
|
3. Handle any blocks of greater than 64 consecutive bytes with
|
|
unrolling to reduce branches.
|
|
4. At least one addr pointer is 16B aligned, use memory version
|
|
of pcmbeqb.
|
|
*/
|
|
.p2align 4,, 4
|
|
L(gt32):
|
|
movq %rdx, %r11
|
|
addq %rdi, %r11
|
|
movq %rdi, %r8
|
|
|
|
andq $15, %r8
|
|
jz L(16am)
|
|
/* Both pointers may be misaligned. */
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
neg %r8
|
|
leaq 16(%rdi, %r8), %rdi
|
|
L(16am):
|
|
/* Handle two 16B aligned pointers separately. */
|
|
testq $15, %rsi
|
|
jz L(ATR)
|
|
testq $16, %rdi
|
|
jz L(A32)
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
L(A32):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
/* Pre-unroll to be ready for unrolled 64B loop. */
|
|
testq $32, %rdi
|
|
jz L(A64)
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
L(A64):
|
|
movq %r11, %r10
|
|
andq $-64, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt32)
|
|
|
|
L(A64main):
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %rdi, %r10
|
|
jne L(A64main)
|
|
|
|
L(mt32):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
|
|
L(A32main):
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %rdi, %r10
|
|
jne L(A32main)
|
|
L(mt16):
|
|
subq %rdi, %r11
|
|
je L(finz)
|
|
movq %r11, %r10
|
|
jmp L(small)
|
|
|
|
.p2align 4,, 4
|
|
L(neq):
|
|
bsfl %edx, %ecx
|
|
movzbl (%rdi, %rcx), %eax
|
|
addq %rdi, %rsi
|
|
movzbl (%rsi,%rcx), %edx
|
|
jmp L(finz1)
|
|
|
|
.p2align 4,, 4
|
|
L(ATR):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
testq $16, %rdi
|
|
jz L(ATR32)
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
cmpq %rdi, %r10
|
|
je L(mt16)
|
|
|
|
L(ATR32):
|
|
movq %r11, %r10
|
|
andq $-64, %r10
|
|
testq $32, %rdi
|
|
jz L(ATR64)
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
L(ATR64):
|
|
cmpq %rdi, %r10
|
|
je L(mt32)
|
|
|
|
L(ATR64main):
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
cmpq %rdi, %r10
|
|
jne L(ATR64main)
|
|
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
|
|
L(ATR32res):
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %r10, %rdi
|
|
jne L(ATR32res)
|
|
|
|
subq %rdi, %r11
|
|
je L(finz)
|
|
movq %r11, %r10
|
|
jmp L(small)
|
|
/* Align to 16byte to improve instruction fetch. */
|
|
.p2align 4,, 4
|
|
END(memcmp)
|
|
|
|
#undef bcmp
|
|
weak_alias (memcmp, bcmp)
|
|
libc_hidden_builtin_def (memcmp)
|