mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
103 lines
2.0 KiB
ArmAsm
103 lines
2.0 KiB
ArmAsm
/* The assembly function for string length. C-SKY ABIV2 version.
|
|
Copyright (C) 2018-2022 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
ENTRY (strlen)
|
|
/* Check if the start addr is aligned. */
|
|
mov r3, r0
|
|
andi r1, r0, 3
|
|
movi r2, 4
|
|
movi r0, 0
|
|
bnez r1, .L_start_not_aligned
|
|
|
|
LABLE_ALIGN
|
|
.L_start_addr_aligned:
|
|
/* Check if all the bytes in the word are not zero. */
|
|
ldw r1, (r3)
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 4)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 8)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 12)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 16)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 20)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 24)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
ldw r1, (r3, 28)
|
|
addi r0, 4
|
|
tstnbz r1
|
|
bf .L_string_tail
|
|
|
|
addi r0, 4
|
|
addi r3, 32
|
|
br .L_start_addr_aligned
|
|
|
|
.L_string_tail:
|
|
xtrb3 r3, r1
|
|
bez r3, .L_return
|
|
addi r0, 1
|
|
xtrb2 r3, r1
|
|
bez r3, .L_return
|
|
addi r0, 1
|
|
xtrb1 r3, r1
|
|
bez r3, .L_return
|
|
addi r0, 1
|
|
|
|
.L_return:
|
|
rts
|
|
|
|
.L_start_not_aligned:
|
|
sub r2, r2, r1
|
|
.L_start_not_aligned_loop:
|
|
ldb r1, (r3)
|
|
PRE_BNEZAD (r2)
|
|
addi r3, 1
|
|
bez r1, .L_return
|
|
addi r0, 1
|
|
BNEZAD (r2, .L_start_not_aligned_loop)
|
|
br .L_start_addr_aligned
|
|
END (strlen)
|
|
|
|
libc_hidden_def (strlen)
|
|
.weak strlen
|