/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.

   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/>.  */

#ifndef _SYS_TAS_H

#define _SYS_TAS_H 1

#include <features.h>

#include <sgidefs.h>

__BEGIN_DECLS

extern int _test_and_set (int *__p, int __v)

     __THROW __attribute__ ((__nomips16__));

#ifdef __USE_EXTERN_INLINES

# ifndef _EXTERN_INLINE

#  define _EXTERN_INLINE __extern_inline

# endif

_EXTERN_INLINE int __attribute__ ((__nomips16__))

__NTH (_test_and_set (int *__p, int __v))

{

  int __r, __t;

  __asm__ __volatile__

    ("/* Inline test and set */\n"

     ".set	push\n\t"

#if _MIPS_SIM == _ABIO32 && __mips < 2

     ".set	mips2\n\t"

#endif

     "sync\n\t"

     "1:\n\t"

     "ll	%0,%3\n\t"

     "move	%1,%4\n\t"

     "beq	%0,%4,2f\n\t"

     "sc	%1,%2\n\t"

     "beqz	%1,1b\n"

     "sync\n\t"

     ".set	pop\n\t"

     "2:\n\t"

     "/* End test and set */"

     : "=&r" (__r), "=&r" (__t), "=m" (*__p)

     : "m" (*__p), "r" (__v)

     : "memory");

  return __r;

}

#endif /* __USE_EXTERN_INLINES */

__END_DECLS

#endif /* sys/tas.h */