diff options
Diffstat (limited to 'libgomp/config/linux/ia64')
| -rw-r--r-- | libgomp/config/linux/ia64/futex.h | 94 | ||||
| -rw-r--r-- | libgomp/config/linux/ia64/mutex.h | 65 |
2 files changed, 159 insertions, 0 deletions
diff --git a/libgomp/config/linux/ia64/futex.h b/libgomp/config/linux/ia64/futex.h new file mode 100644 index 000000000..e5e9aac39 --- /dev/null +++ b/libgomp/config/linux/ia64/futex.h @@ -0,0 +1,94 @@ +/* Copyright (C) 2005, 2008, 2009 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 General Public License as published by + the Free Software Foundation; either version 3, 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +/* Provide target-specific access to the futex system call. */ + +#include <sys/syscall.h> + + + +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"(r8), "=r"(r10) + : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3) + : "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", + "r28", "r29", "r30", "r31", + /* Predicate registers. */ + "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", + /* Non-rotating fp registers. */ + "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) +{ + 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) +{ + 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 (); +} diff --git a/libgomp/config/linux/ia64/mutex.h b/libgomp/config/linux/ia64/mutex.h new file mode 100644 index 000000000..6e294059b --- /dev/null +++ b/libgomp/config/linux/ia64/mutex.h @@ -0,0 +1,65 @@ +/* Copyright (C) 2005, 2008, 2009 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 General Public License as published by + the Free Software Foundation; either version 3, 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +/* This is a Linux specific implementation of a mutex synchronization + mechanism for libgomp. This type is private to the library. This + implementation uses atomic instructions and the futex syscall. */ + +#ifndef GOMP_MUTEX_H +#define GOMP_MUTEX_H 1 + +typedef int gomp_mutex_t; + +#define GOMP_MUTEX_INIT_0 1 + +static inline void gomp_mutex_init (gomp_mutex_t *mutex) +{ + *mutex = 0; +} + +extern void gomp_mutex_lock_slow (gomp_mutex_t *mutex); +static inline void gomp_mutex_lock (gomp_mutex_t *mutex) +{ + if (!__sync_bool_compare_and_swap (mutex, 0, 1)) + gomp_mutex_lock_slow (mutex); +} + +extern void gomp_mutex_unlock_slow (gomp_mutex_t *mutex); + +/* IA64 needs a __sync_synchronize call before __sync_lock_test_and_set + because __sync_lock_test_and_set is not a full memory fence. */ +static inline void gomp_mutex_unlock (gomp_mutex_t *mutex) +{ + int val; + __sync_synchronize (); + val = __sync_lock_test_and_set (mutex, 0); + if (__builtin_expect (val > 1, 0)) + gomp_mutex_unlock_slow (mutex); +} + +static inline void gomp_mutex_destroy (gomp_mutex_t *mutex) +{ +} + +#endif /* GOMP_MUTEX_H */ |