/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.

   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 "pthreadP.h"

int

pthread_spin_lock (pthread_spinlock_t *lock)

{

  unsigned int __tmp;

  asm volatile (

       "1:	lwarx	%0,0,%1" MUTEX_HINT_ACQ "\n"

       "	cmpwi	0,%0,0\n"

       "	bne-	2f\n"

       "	stwcx.	%2,0,%1\n"

       "	bne-	2f\n"

                __ARCH_ACQ_INSTR "\n"

       "	.subsection 1\n"

       "2:	lwzx	%0,0,%1\n"

       "	cmpwi	0,%0,0\n"

       "	bne	2b\n"

       "	b	1b\n"

       "	.previous"

       : "=&r" (__tmp)

       : "r" (lock), "r" (1)

       : "cr0", "memory");

  return 0;

}