1 /* Copyright (C) 2005-2013 Free Software Foundation, Inc.
2 Contributed by Jakub Jelinek <jakub@redhat.com>.
4 This file is part of the GNU OpenMP Library (libgomp).
6 Libgomp is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
25 /* Provide target-specific access to the futex system call. */
27 #include <sys/syscall.h>
30 sys_futex0 (int *addr, int op, int val)
32 register long int g1 __asm__ ("g1");
33 register long int o0 __asm__ ("o0");
34 register long int o1 __asm__ ("o1");
35 register long int o2 __asm__ ("o2");
36 register long int o3 __asm__ ("o3");
45 # define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:"
47 # define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:"
50 __asm volatile (SYSCALL_STRING
51 : "=r" (g1), "=r" (o0)
52 : "0" (g1), "1" (o0), "r" (o1), "r" (o2), "r" (o3)
53 : "g2", "g3", "g4", "g5", "g6",
54 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
55 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
56 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
57 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
59 "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",
60 "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",
67 futex_wait (int *addr, int val)
69 long err = sys_futex0 (addr, gomp_futex_wait, val);
70 if (__builtin_expect (err == ENOSYS, 0))
72 gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
73 gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
74 sys_futex0 (addr, gomp_futex_wait, val);
79 futex_wake (int *addr, int count)
81 long err = sys_futex0 (addr, gomp_futex_wake, count);
82 if (__builtin_expect (err == ENOSYS, 0))
84 gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
85 gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
86 sys_futex0 (addr, gomp_futex_wake, count);
93 __asm volatile ("rd %%ccr, %%g0" : : : "memory");