projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 953ff289 DN |
1 | /* Copyright (C) 2005 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 Lesser General Public License as published by | |
| 8 | the Free Software Foundation; either version 2.1 of the License, or | |
| 9 | (at your option) 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 Lesser General Public License for | |
| 14 | more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public License | |
| 17 | along with libgomp; see the file COPYING.LIB. If not, write to the | |
| 18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
| 19 | MA 02110-1301, USA. */ | |
| 20 | ||
| 21 | /* As a special exception, if you link this library with other files, some | |
| 22 | of which are compiled with GCC, to produce an executable, this library | |
| 23 | does not by itself cause the resulting executable to be covered by the | |
| 24 | GNU General Public License. This exception does not however invalidate | |
| 25 | any other reasons why the executable file might be covered by the GNU | |
| 26 | General Public License. */ | |
| 27 | ||
| 28 | /* Provide target-specific access to the futex system call. */ | |
| 29 | ||
| 30 | #include <sys/syscall.h> | |
| 31 | ||
| 32 | #define FUTEX_WAIT 0 | |
| 33 | #define FUTEX_WAKE 1 | |
| 34 | ||
| 35 | ||
| 36 | static inline void | |
| 37 | sys_futex0(int *addr, int op, int val) | |
| 38 | { | |
| 39 | register long out0 asm ("out0") = (long) addr; | |
| 40 | register long out1 asm ("out1") = op; | |
| 41 | register long out2 asm ("out2") = val; | |
| 42 | register long out3 asm ("out3") = 0; | |
| 43 | register long r15 asm ("r15") = SYS_futex; | |
| 44 | ||
| 45 | __asm __volatile ("break 0x100000" | |
| 46 | : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3) | |
| 47 | : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3) | |
| 48 | : "memory", "r8", "r10", "out4", "out5", "out6", "out7", | |
| 49 | /* Non-stacked integer registers, minus r8, r10, r15. */ | |
| 50 | "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", | |
| 51 | "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", | |
| 52 | "r28", "r29", "r30", "r31", | |
| 53 | /* Predicate registers. */ | |
| 54 | "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", | |
| 55 | /* Non-rotating fp registers. */ | |
| 56 | "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", | |
| 57 | /* Branch registers. */ | |
| 58 | "b6"); | |
| 59 | } | |
| 60 | ||
| 61 | static inline void | |
| 62 | futex_wait (int *addr, int val) | |
| 63 | { | |
| 64 | sys_futex0 (addr, FUTEX_WAIT, val); | |
| 65 | } | |
| 66 | ||
| 67 | static inline void | |
| 68 | futex_wake (int *addr, int count) | |
| 69 | { | |
| 70 | sys_futex0 (addr, FUTEX_WAKE, count); | |
| 71 | } |