1 /* Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19
20 /* L4/KYMA: Includes update from GCC
21 * mips-2014.05/mips-linux-gnu/libc/uclibc/usr/include/sys/tas.h */
22
23 #ifndef _SYS_TAS_H
24 #define _SYS_TAS_H 1
25
26 #include <features.h>
27 #include <sgidefs.h>
28
29 __BEGIN_DECLS
30
31 extern int _test_and_set (int *p, int v) __THROW;
32
33 #ifdef __USE_EXTERN_INLINES
34
35 # ifndef _EXTERN_INLINE
36 # define _EXTERN_INLINE extern __inline
37 # endif
38
39 _EXTERN_INLINE int
__NTH(_test_and_set (int * p,int v))40 __NTH (_test_and_set (int *p, int v))
41 {
42 int r, t;
43
44 __asm__ __volatile__
45 ("/* Inline test and set */\n"
46 ".set push\n\t"
47 #if _MIPS_SIM == _ABIO32 && __mips < 2
48 ".set mips2\n\t"
49 #endif
50 "sync\n\t"
51 "1:\n\t"
52 "ll %0,%3\n\t"
53 "move %1,%4\n\t"
54 "beq %0,%4,2f\n\t"
55 "sc %1,%2\n\t"
56 "beqz %1,1b\n"
57 "sync\n\t"
58 ".set pop\n\t"
59 "2:\n\t"
60 "/* End test and set */"
61 : "=&r" (r), "=&r" (t), "=m" (*p)
62 : "m" (*p), "r" (v)
63 : "memory");
64
65 return r;
66 }
67
68 #endif /* __USE_EXTERN_INLINES */
69
70 __END_DECLS
71
72 #endif /* sys/tas.h */
73