diff options
Diffstat (limited to 'libgomp/config/linux/ia64/futex.h')
| -rw-r--r-- | libgomp/config/linux/ia64/futex.h | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/libgomp/config/linux/ia64/futex.h b/libgomp/config/linux/ia64/futex.h index 5e54982d6f7..35aa4f1fea0 100644 --- a/libgomp/config/linux/ia64/futex.h +++ b/libgomp/config/linux/ia64/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). @@ -29,23 +29,24 @@ #include <sys/syscall.h> -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -static inline void -sys_futex0(int *addr, int op, int val) +static inline long +sys_futex0(int *addr, long op, int val) { register long out0 asm ("out0") = (long) addr; register long out1 asm ("out1") = op; register long out2 asm ("out2") = val; register long out3 asm ("out3") = 0; + register long r8 asm ("r8"); + register long r10 asm ("r10"); register long r15 asm ("r15") = SYS_futex; __asm __volatile ("break 0x100000" - : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3) + : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3), + "=r"(r8), "=r"(r10) : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3) - : "memory", "r8", "r10", "out4", "out5", "out6", "out7", + : "memory", "out4", "out5", "out6", "out7", /* Non-stacked integer registers, minus r8, r10, r15. */ "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", @@ -56,16 +57,41 @@ sys_futex0(int *addr, int op, int val) "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", /* Branch registers. */ "b6"); + return r8 & r10; } 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 ("hint @pause" : : : "memory"); +} + +static inline void +atomic_write_barrier (void) +{ + __sync_synchronize (); } |