about summary refs log tree commit diff
path: root/sysdeps/sparc/sparc32/pthread_spin_lock.S
blob: d8d887a36fe8c45e4ab266f0f1f979d7545a8c92 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/* Copyright (C) 2012-2019 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/>.  */

#include <sysdep.h>

	.text
ENTRY(pthread_spin_lock)
1:	ldstub		[%o0], %g1
	orcc		%g1, 0x0, %g0
	bne,a		2f
	 ldub		[%o0], %g1
	retl
	 mov		0, %o0
2:	orcc		%g1, 0x0, %g0
	bne,a		2b
	 ldub		[%o0], %g1
	ba,a		1b
END(pthread_spin_lock)