83 lines
1.7 KiB
ArmAsm
83 lines
1.7 KiB
ArmAsm
/* Determine the length of a string. For SPARC v9.
|
|
Copyright (C) 1998-2022 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>
|
|
|
|
.register %g2, #scratch
|
|
.register %g3, #scratch
|
|
|
|
.text
|
|
.align 32
|
|
ENTRY(strlen)
|
|
mov %o0, %o1
|
|
andn %o0, 0x7, %o0
|
|
|
|
ldx [%o0], %o5
|
|
and %o1, 0x7, %g1
|
|
mov -1, %g5
|
|
|
|
sethi %hi(0x01010101), %o2
|
|
sll %g1, 3, %g1
|
|
|
|
or %o2, %lo(0x01010101), %o2
|
|
srlx %g5, %g1, %o3
|
|
|
|
sllx %o2, 32, %g1
|
|
sethi %hi(0x0000ff00), %g5
|
|
|
|
orn %o5, %o3, %o5
|
|
or %o2, %g1, %o2
|
|
|
|
sllx %o2, 7, %o3
|
|
10: add %o0, 8, %o0
|
|
|
|
andn %o3, %o5, %g1
|
|
sub %o5, %o2, %g2
|
|
|
|
andcc %g1, %g2, %g0
|
|
be,a,pt %xcc, 10b
|
|
ldx [%o0], %o5
|
|
srlx %o5, 32, %g1
|
|
|
|
andn %o3, %g1, %o4
|
|
sub %g1, %o2, %g2
|
|
|
|
add %o0, 4, %g3
|
|
andcc %o4, %g2, %g0
|
|
movne %icc, %g1, %o5
|
|
|
|
move %icc, %g3, %o0
|
|
or %g5, %lo(0x0000ff00), %g5
|
|
mov 3 - 8, %g2
|
|
|
|
andcc %o5, %g5, %g0
|
|
srlx %o5, 16, %g1
|
|
move %icc, 2 - 8, %g2
|
|
|
|
andcc %g1, 0xff, %g0
|
|
srl %o5, 24, %o5
|
|
move %icc, 1 - 8, %g2
|
|
|
|
movrz %o5, 0 - 8, %g2
|
|
sub %o0, %o1, %o0
|
|
|
|
retl
|
|
add %o0, %g2, %o0
|
|
END(strlen)
|
|
libc_hidden_builtin_def (strlen)
|