diff options
Diffstat (limited to 'libgomp/config/linux/sparc/futex.h')
| -rw-r--r-- | libgomp/config/linux/sparc/futex.h | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/libgomp/config/linux/sparc/futex.h b/libgomp/config/linux/sparc/futex.h index 7b1cc837956..b9bc387355f 100644 --- a/libgomp/config/linux/sparc/futex.h +++ b/libgomp/config/linux/sparc/futex.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. +/* Copyright (C) 2005, 2008 Free Software Foundation, Inc. Contributed by Jakub Jelinek <jakub@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 g1 __asm__ ("g1"); @@ -47,9 +45,9 @@ sys_futex0 (int *addr, int op, int val) o3 = 0; #ifdef __arch64__ -# define SYSCALL_STRING "ta\t0x6d" +# define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:" #else -# define SYSCALL_STRING "ta\t0x10" +# define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:" #endif __asm volatile (SYSCALL_STRING @@ -65,16 +63,49 @@ sys_futex0 (int *addr, int op, int val) "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", #endif "cc", "memory"); + return o0; } 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) +{ +#if defined __arch64__ || defined __sparc_v9__ + __asm volatile ("membar #LoadLoad" : : : "memory"); +#else + __asm volatile ("" : : : "memory"); +#endif +} + +static inline void +atomic_write_barrier (void) +{ +#if defined __arch64__ || defined __sparc_v9__ + __asm volatile ("membar #StoreStore" : : : "memory"); +#else + __sync_synchronize (); +#endif } |
