1 /* Copyright (C) 2005-2015 Free Software Foundation, Inc.
2 Contributed by Jakub Jelinek <jakub@redhat.com>.
4 This file is part of the GNU Offloading and Multi Processing Library
7 Libgomp is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 /* Provide target-specific access to the futex system call. */
28 #include <sys/syscall.h>
31 sys_futex0 (int *addr
, int op
, int val
)
33 register long int g1
__asm__ ("g1");
34 register long int o0
__asm__ ("o0");
35 register long int o1
__asm__ ("o1");
36 register long int o2
__asm__ ("o2");
37 register long int o3
__asm__ ("o3");
46 # define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:"
48 # define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:"
51 __asm
volatile (SYSCALL_STRING
52 : "=r" (g1
), "=r" (o0
)
53 : "0" (g1
), "1" (o0
), "r" (o1
), "r" (o2
), "r" (o3
)
54 : "g2", "g3", "g4", "g5", "g6",
55 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
56 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
57 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
58 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
60 "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",
61 "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",
68 futex_wait (int *addr
, int val
)
70 long err
= sys_futex0 (addr
, gomp_futex_wait
, val
);
71 if (__builtin_expect (err
== ENOSYS
, 0))
73 gomp_futex_wait
&= ~FUTEX_PRIVATE_FLAG
;
74 gomp_futex_wake
&= ~FUTEX_PRIVATE_FLAG
;
75 sys_futex0 (addr
, gomp_futex_wait
, val
);
80 futex_wake (int *addr
, int count
)
82 long err
= sys_futex0 (addr
, gomp_futex_wake
, count
);
83 if (__builtin_expect (err
== ENOSYS
, 0))
85 gomp_futex_wait
&= ~FUTEX_PRIVATE_FLAG
;
86 gomp_futex_wake
&= ~FUTEX_PRIVATE_FLAG
;
87 sys_futex0 (addr
, gomp_futex_wake
, count
);
94 __asm
volatile ("rd %%ccr, %%g0" : : : "memory");