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/* Determine the length of a string.
For SPARC v7.
Copyright (C) 1996-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jj@ultra.linux.cz> and
David S. Miller <davem@davemloft.net>.
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
.align 4
ENTRY(strlen)
mov %o0, %o1
andn %o0, 0x3, %o0
ld [%o0], %o5
and %o1, 0x3, %g1
mov -1, %g5
sethi %hi(0x01010101), %o2
sll %g1, 3, %g1
or %o2, %lo(0x01010101), %o2
srl %g5, %g1, %g2
orn %o5, %g2, %o5
sll %o2, 7, %o3
10: add %o0, 4, %o0
andn %o3, %o5, %g1
sub %o5, %o2, %g2
andcc %g1, %g2, %g0
be,a 10b
ld [%o0], %o5
srl %o5, 24, %g1
andcc %g1, 0xff, %g0
be 90f
sub %o0, 4, %o0
srl %o5, 16, %g2
andcc %g2, 0xff, %g0
be 90f
add %o0, 1, %o0
srl %o5, 8, %g1
andcc %g1, 0xff, %g0
be 90f
add %o0, 1, %o0
add %o0, 1, %o0
90: retl
sub %o0, %o1, %o0
END(strlen)
libc_hidden_builtin_def (strlen)
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