Mercurial > hg > CbC > CbC_gcc

comparison libgomp/config/linux/ia64/futex.h @ 0:a06113de4d67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children 04ced10e8804
comparison
equal deleted inserted replaced
-1:000000000000 0:a06113de4d67
1 /* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
2 Contributed by Richard Henderson <rth@redhat.com>.
3
4 This file is part of the GNU OpenMP Library (libgomp).
5
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)
9 any later version.
10
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
14 more details.
15
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.
19
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/>. */
24
25 /* Provide target-specific access to the futex system call. */
26
27 #include <sys/syscall.h>
28
29
30
31 static inline long
32 sys_futex0(int *addr, long op, int val)
33 {
34 register long out0 asm ("out0") = (long) addr;
35 register long out1 asm ("out1") = op;
36 register long out2 asm ("out2") = val;
37 register long out3 asm ("out3") = 0;
38 register long r8 asm ("r8");
39 register long r10 asm ("r10");
40 register long r15 asm ("r15") = SYS_futex;
41
42 __asm __volatile ("break 0x100000"
43 : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3),
44 "=r"(r8), "=r"(r10)
45 : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3)
46 : "memory", "out4", "out5", "out6", "out7",
47 /* Non-stacked integer registers, minus r8, r10, r15. */
48 "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18",
49 "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27",
50 "r28", "r29", "r30", "r31",
51 /* Predicate registers. */
52 "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
53 /* Non-rotating fp registers. */
54 "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
55 /* Branch registers. */
56 "b6");
57 return r8 & r10;
58 }
59
60 static inline void
61 futex_wait (int *addr, int val)
62 {
63 long err = sys_futex0 (addr, gomp_futex_wait, val);
64 if (__builtin_expect (err == ENOSYS, 0))
65 {
66 gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
67 gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
68 sys_futex0 (addr, gomp_futex_wait, val);
69 }
70 }
71
72 static inline void
73 futex_wake (int *addr, int count)
74 {
75 long err = sys_futex0 (addr, gomp_futex_wake, count);
76 if (__builtin_expect (err == ENOSYS, 0))
77 {
78 gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
79 gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
80 sys_futex0 (addr, gomp_futex_wake, count);
81 }
82 }
83
84 static inline void
85 cpu_relax (void)
86 {
87 __asm volatile ("hint @pause" : : : "memory");
88 }
89
90 static inline void
91 atomic_write_barrier (void)
92 {
93 __sync_synchronize ();
94 }