| /* Copyright (C) 2000-2014 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 |
| ".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 */ |
