diff options
Diffstat (limited to 'libgomp/config/linux/powerpc')
| -rw-r--r-- | libgomp/config/linux/powerpc/futex.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libgomp/config/linux/powerpc/futex.h b/libgomp/config/linux/powerpc/futex.h new file mode 100644 index 00000000000..20e03573783 --- /dev/null +++ b/libgomp/config/linux/powerpc/futex.h @@ -0,0 +1,70 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@redhat.com>. + + This file is part of the GNU OpenMP Library (libgomp). + + Libgomp 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. + + Libgomp 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 libgomp; see the file COPYING.LIB. If not, write to the + Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + MA 02110-1301, USA. */ + +/* As a special exception, if you link this library with other files, some + of which are compiled with GCC, to produce an executable, this library + does not by itself cause the resulting executable to be covered by the + GNU General Public License. This exception does not however invalidate + any other reasons why the executable file might be covered by the GNU + General Public License. */ + +/* Provide target-specific access to the futex system call. */ + +#include <sys/syscall.h> +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + +static inline void +sys_futex0 (int *addr, int op, int val) +{ + register long int r0 __asm__ ("r0"); + register long int r3 __asm__ ("r3"); + register long int r4 __asm__ ("r4"); + register long int r5 __asm__ ("r5"); + register long int r6 __asm__ ("r6"); + + r0 = SYS_futex; + r3 = (long) addr; + r4 = op; + r5 = val; + r6 = 0; + + /* ??? The powerpc64 sysdep.h file clobbers ctr; the powerpc32 sysdep.h + doesn't. It doesn't much matter for us. In the interest of unity, + go ahead and clobber it always. */ + + __asm volatile ("sc" + : "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6) + : "r"(r0), "r"(r3), "r"(r4), "r"(r5), "r"(r6) + : "r7", "r8", "r9", "r10", "r11", "r12", + "cr0", "ctr", "memory"); +} + +static inline void +futex_wait (int *addr, int val) +{ + sys_futex0 (addr, FUTEX_WAIT, val); +} + +static inline void +futex_wake (int *addr, int count) +{ + sys_futex0 (addr, FUTEX_WAKE, count); +} |