From 9cee42f10dbc5b33866ff137b926a74abd7c1a5b Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Fri, 1 Mar 2002 20:46:26 +0000 Subject: Major rework of the include files to eliminate redundancy and to better support each arch. This is a really big patch... -Erik --- libc/sysdeps/linux/mips/sys/tas.h | 76 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 libc/sysdeps/linux/mips/sys/tas.h (limited to 'libc/sysdeps/linux/mips/sys/tas.h') diff --git a/libc/sysdeps/linux/mips/sys/tas.h b/libc/sysdeps/linux/mips/sys/tas.h new file mode 100644 index 000000000..0c81dc2de --- /dev/null +++ b/libc/sysdeps/linux/mips/sys/tas.h @@ -0,0 +1,76 @@ +/* Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maciej W. Rozycki , 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _SYS_TAS_H +#define _SYS_TAS_H 1 + +#include +#include +#include + +__BEGIN_DECLS + +extern int _test_and_set (int *p, int v) __THROW; + +#ifdef __USE_EXTERN_INLINES + +# ifndef _EXTERN_INLINE +# define _EXTERN_INLINE extern __inline +# endif + +# if (_MIPS_ISA >= _MIPS_ISA_MIPS2) + +_EXTERN_INLINE int +_test_and_set (int *p, int v) __THROW +{ + int r, t; + + __asm__ __volatile__ + ("1:\n\t" + "ll %0,%3\n\t" + ".set push\n\t" + ".set noreorder\n\t" + "beq %0,%4,2f\n\t" + " move %1,%4\n\t" + ".set pop\n\t" + "sc %1,%2\n\t" + "beqz %1,1b\n" + "2:\n" + : "=&r" (r), "=&r" (t), "=m" (*p) + : "m" (*p), "r" (v) + : "memory"); + + return r; +} + +# else /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + +_EXTERN_INLINE int +_test_and_set (int *p, int v) __THROW +{ + return sysmips (MIPS_ATOMIC_SET, (int) p, v, 0); +} + +# endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + +#endif /* __USE_EXTERN_INLINES */ + +__END_DECLS + +#endif /* sys/tas.h */ -- cgit v1.2.3