/* Copyright (C) 2003-2012 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
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <shlib-compat.h>
#include <pthread-errnos.h>
#include <lowlevellock.h>
#include "lowlevel-atomic.h"


	.text

	.globl	__new_sem_trywait
	.type	__new_sem_trywait,@function
	.align	5
	cfi_startproc
__new_sem_trywait:
	mov.l	r12, @-r15
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (r12, 0)
	mov.l	r8, @-r15
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (r8, 0)
	sts.l	pr, @-r15
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (pr, 0)
	mov	r4, r8
	mov.l	@r8, r0
2:
	tst	r0, r0
	bt	1f

	mov	r0, r3
	mov	r0, r4
	add	#-1, r3
	CMPXCHG (r4, @r8, r3, r2)
	bf/s	2b
	 mov	r2, r0

	cfi_remember_state
	lds.l	@r15+, pr
	cfi_adjust_cfa_offset (-4)
	cfi_restore (pr)
	mov.l	@r15+, r8
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r8)
	mov.l	@r15+, r12
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r12)
	rts
	 mov	#0, r0
	cfi_restore_state

1:
	mov	#EAGAIN, r8
	mova	.Lgot1, r0
	mov.l	.Lgot1, r12
	add	r0, r12

	mov.l	.Lerrno1, r0
	stc	gbr, r1
	mov.l	@(r0, r12), r0
	bra	.Lexit
	 add	r1, r0
	.align	2
.Lerrno1:
	.long	errno@GOTTPOFF
.Lexit:
	mov.l	r8, @r0
	lds.l	@r15+, pr
	cfi_adjust_cfa_offset (-4)
	cfi_restore (pr)
	mov.l	@r15+, r8
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r8)
	mov.l	@r15+, r12
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r12)
	rts
	 mov	#-1, r0

	cfi_endproc

	.align	2
.Lgot1:
	.long	_GLOBAL_OFFSET_TABLE_
	.size	__new_sem_trywait,.-__new_sem_trywait
	versioned_symbol(libpthread, __new_sem_trywait, sem_trywait, GLIBC_2_1)