diff options
Diffstat (limited to 'libgomp/config/linux/powerpc/futex.h')
| -rw-r--r-- | libgomp/config/linux/powerpc/futex.h | 39 |
1 files changed, 32 insertions, 7 deletions
diff --git a/libgomp/config/linux/powerpc/futex.h b/libgomp/config/linux/powerpc/futex.h index 20e03573783..c1e0d0f5651 100644 --- a/libgomp/config/linux/powerpc/futex.h +++ b/libgomp/config/linux/powerpc/futex.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. +/* Copyright (C) 2005, 2008 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU OpenMP Library (libgomp). @@ -28,10 +28,8 @@ /* Provide target-specific access to the futex system call. */ #include <sys/syscall.h> -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -static inline void +static inline long sys_futex0 (int *addr, int op, int val) { register long int r0 __asm__ ("r0"); @@ -50,21 +48,48 @@ sys_futex0 (int *addr, int op, int val) doesn't. It doesn't much matter for us. In the interest of unity, go ahead and clobber it always. */ - __asm volatile ("sc" + __asm volatile ("sc; mfcr %0" : "=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"); + if (__builtin_expect (r0 & (1 << 28), 0)) + return r3; + return 0; } static inline void futex_wait (int *addr, int val) { - sys_futex0 (addr, FUTEX_WAIT, val); + long err = sys_futex0 (addr, gomp_futex_wait, val); + if (__builtin_expect (err == ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wait, val); + } } static inline void futex_wake (int *addr, int count) { - sys_futex0 (addr, FUTEX_WAKE, count); + long err = sys_futex0 (addr, gomp_futex_wake, count); + if (__builtin_expect (err == ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wake, count); + } +} + +static inline void +cpu_relax (void) +{ + __asm volatile ("" : : : "memory"); +} + +static inline void +atomic_write_barrier (void) +{ + __asm volatile ("eieio" : : : "memory"); } |
