projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 18d73c7f | 1 | /* Copyright (C) 2005-2014 Free Software Foundation, Inc. |
| 318e8c3f IG |
2 | Contributed by Ilie Garbacea <ilie@mips.com>, Chao-ying Fu <fu@mips.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 | |
| 748086b7 JJ |
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. | |
| 318e8c3f IG |
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 | |
| 748086b7 | 13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 318e8c3f IG |
14 | more details. |
| 15 | ||
| 748086b7 JJ |
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/>. */ | |
| 318e8c3f IG |
24 | |
| 25 | /* Provide target-specific access to the futex system call. */ | |
| 26 | ||
| 27 | #include <sys/syscall.h> | |
| 28 | #define FUTEX_WAIT 0 | |
| 29 | #define FUTEX_WAKE 1 | |
| 30 | ||
| c24dbebb CLT |
31 | #ifdef __mips16 |
| 32 | static void __attribute__((noinline,nomips16)) | |
| 33 | #else | |
| 318e8c3f | 34 | static inline void |
| c24dbebb | 35 | #endif |
| 318e8c3f IG |
36 | sys_futex0 (int *addr, int op, int val) |
| 37 | { | |
| c24dbebb | 38 | register unsigned long __v0 asm("$2"); |
| 318e8c3f IG |
39 | register unsigned long __a0 asm("$4") = (unsigned long) addr; |
| 40 | register unsigned long __a1 asm("$5") = (unsigned long) op; | |
| 41 | register unsigned long __a2 asm("$6") = (unsigned long) val; | |
| 42 | register unsigned long __a3 asm("$7") = 0; | |
| 43 | ||
| c24dbebb CLT |
44 | __asm volatile ("li $2, %6\n\t" |
| 45 | "syscall" | |
| 318e8c3f IG |
46 | /* returns $a3 (errno), $v0 (return value) */ |
| 47 | : "=r" (__v0), "=r" (__a3) | |
| c24dbebb CLT |
48 | /* arguments in a0-a3, and syscall number */ |
| 49 | : "r" (__a0), "r" (__a1), "r" (__a2), "r" (__a3), | |
| 50 | "IK" (SYS_futex) | |
| 318e8c3f IG |
51 | /* clobbers at, v1, t0-t9, memory */ |
| 52 | : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", | |
| 53 | "$15", "$24", "$25", "memory"); | |
| 54 | } | |
| 55 | ||
| 56 | static inline void | |
| 57 | futex_wait (int *addr, int val) | |
| 58 | { | |
| 59 | sys_futex0 (addr, FUTEX_WAIT, val); | |
| 60 | } | |
| 61 | ||
| 62 | static inline void | |
| 63 | futex_wake (int *addr, int count) | |
| 64 | { | |
| 65 | sys_futex0 (addr, FUTEX_WAKE, count); | |
| 66 | } | |
| 67 | ||
| 68 | static inline void | |
| 69 | cpu_relax (void) | |
| 70 | { | |
| 71 | __asm volatile ("" : : : "memory"); | |
| 72 | } |