projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2011-2015 Free Software Foundation, Inc. |
| 63d143a2 CM |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 63d143a2 CM |
18 | |
| 19 | #ifndef _BITS_ATOMIC_H | |
| 20 | #define _BITS_ATOMIC_H 1 | |
| 21 | ||
| 22 | #include <asm/unistd.h> | |
| 23 | ||
| 1ea339b6 TR |
24 | #define __HAVE_64B_ATOMICS 0 |
| 25 | #define USE_ATOMIC_COMPILER_BUILTINS 0 | |
| 26 | ||
| 63d143a2 CM |
27 | /* 32-bit integer compare-and-exchange. */ |
| 28 | static __inline __attribute__ ((always_inline)) | |
| 29 | int __atomic_cmpxchg_32 (volatile int *mem, int newval, int oldval) | |
| 30 | { | |
| 31 | int result; | |
| 32 | __asm__ __volatile__ ("swint1" | |
| 33 | : "=R00" (result), "=m" (*mem) | |
| 34 | : "R10" (__NR_FAST_cmpxchg), "R00" (mem), | |
| 35 | "R01" (oldval), "R02" (newval), "m" (*mem) | |
| 36 | : "r20", "r21", "r22", "r23", "r24", | |
| 37 | "r25", "r26", "r27", "r28", "r29", "memory"); | |
| 38 | return result; | |
| 39 | } | |
| 40 | ||
| 41 | #define atomic_compare_and_exchange_val_acq(mem, n, o) \ | |
| 42 | ((__typeof (*(mem))) \ | |
| 43 | ((sizeof (*(mem)) == 4) ? \ | |
| 44 | __atomic_cmpxchg_32 ((int *) (mem), (int) (n), (int) (o)) : \ | |
| 45 | __atomic_error_bad_argument_size())) | |
| 46 | ||
| 47 | /* Atomically compute: | |
| 48 | int old = *ptr; | |
| 49 | *ptr = (old & mask) + addend; | |
| 50 | return old; */ | |
| 51 | ||
| 52 | static __inline __attribute__ ((always_inline)) | |
| 53 | int __atomic_update_32 (volatile int *mem, int mask, int addend) | |
| 54 | { | |
| 55 | int result; | |
| 56 | __asm__ __volatile__ ("swint1" | |
| 57 | : "=R00" (result), "=m" (*mem) | |
| 58 | : "R10" (__NR_FAST_atomic_update), "R00" (mem), | |
| 59 | "R01" (mask), "R02" (addend), "m" (*mem) | |
| 60 | : "r20", "r21", "r22", "r23", "r24", | |
| 61 | "r25", "r26", "r27", "r28", "r29", "memory"); | |
| 62 | return result; | |
| 63 | } | |
| 64 | ||
| 65 | /* Size-checked verson of __atomic_update_32. */ | |
| 66 | #define __atomic_update(mem, mask, addend) \ | |
| 67 | ((__typeof (*(mem))) \ | |
| 68 | ((sizeof (*(mem)) == 4) ? \ | |
| 69 | __atomic_update_32 ((int *) (mem), (int) (mask), (int) (addend)) : \ | |
| 70 | __atomic_error_bad_argument_size ())) | |
| 71 | ||
| 72 | #define atomic_exchange_acq(mem, newvalue) \ | |
| 73 | __atomic_update ((mem), 0, (newvalue)) | |
| 74 | #define atomic_exchange_and_add(mem, value) \ | |
| 75 | __atomic_update ((mem), -1, (value)) | |
| 76 | #define atomic_and_val(mem, mask) \ | |
| 77 | __atomic_update ((mem), (mask), 0) | |
| 78 | #define atomic_or_val(mem, mask) \ | |
| 79 | ({ __typeof (mask) __att1_v = (mask); \ | |
| 80 | __atomic_update ((mem), ~__att1_v, __att1_v); }) | |
| 81 | ||
| 82 | #include <sysdeps/tile/bits/atomic.h> | |
| 83 | ||
| 84 | #endif /* bits/atomic.h */ |