Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_CUTILS_ATOMIC_MIPS_H |
| 18 | #define ANDROID_CUTILS_ATOMIC_MIPS_H |
| 19 | |
| 20 | #include <stdint.h> |
| 21 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 22 | #ifndef ANDROID_ATOMIC_INLINE |
| 23 | #define ANDROID_ATOMIC_INLINE inline __attribute__((always_inline)) |
| 24 | #endif |
| 25 | |
| 26 | extern ANDROID_ATOMIC_INLINE void android_compiler_barrier(void) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 27 | { |
| 28 | __asm__ __volatile__ ("" : : : "memory"); |
| 29 | } |
| 30 | |
| 31 | #if ANDROID_SMP == 0 |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 32 | extern ANDROID_ATOMIC_INLINE void android_memory_barrier(void) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 33 | { |
| 34 | android_compiler_barrier(); |
| 35 | } |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 36 | extern ANDROID_ATOMIC_INLINE void android_memory_store_barrier(void) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 37 | { |
| 38 | android_compiler_barrier(); |
| 39 | } |
| 40 | #else |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 41 | extern ANDROID_ATOMIC_INLINE void android_memory_barrier(void) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 42 | { |
| 43 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 44 | } |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 45 | extern ANDROID_ATOMIC_INLINE void android_memory_store_barrier(void) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 46 | { |
| 47 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 48 | } |
| 49 | #endif |
| 50 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 51 | extern ANDROID_ATOMIC_INLINE int32_t |
| 52 | android_atomic_acquire_load(volatile const int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 53 | { |
| 54 | int32_t value = *ptr; |
| 55 | android_memory_barrier(); |
| 56 | return value; |
| 57 | } |
| 58 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 59 | extern ANDROID_ATOMIC_INLINE int32_t |
| 60 | android_atomic_release_load(volatile const int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 61 | { |
| 62 | android_memory_barrier(); |
| 63 | return *ptr; |
| 64 | } |
| 65 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 66 | extern ANDROID_ATOMIC_INLINE void |
| 67 | android_atomic_acquire_store(int32_t value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 68 | { |
| 69 | *ptr = value; |
| 70 | android_memory_barrier(); |
| 71 | } |
| 72 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 73 | extern ANDROID_ATOMIC_INLINE void |
| 74 | android_atomic_release_store(int32_t value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 75 | { |
| 76 | android_memory_barrier(); |
| 77 | *ptr = value; |
| 78 | } |
| 79 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 80 | extern ANDROID_ATOMIC_INLINE int |
| 81 | android_atomic_cas(int32_t old_value, int32_t new_value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 82 | { |
| 83 | int32_t prev, status; |
| 84 | do { |
| 85 | __asm__ __volatile__ ( |
| 86 | " ll %[prev], (%[ptr])\n" |
| 87 | " li %[status], 1\n" |
| 88 | " bne %[prev], %[old], 9f\n" |
| 89 | " move %[status], %[new_value]\n" |
| 90 | " sc %[status], (%[ptr])\n" |
| 91 | "9:\n" |
| 92 | : [prev] "=&r" (prev), [status] "=&r" (status) |
| 93 | : [ptr] "r" (ptr), [old] "r" (old_value), [new_value] "r" (new_value) |
| 94 | ); |
| 95 | } while (__builtin_expect(status == 0, 0)); |
| 96 | return prev != old_value; |
| 97 | } |
| 98 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 99 | extern ANDROID_ATOMIC_INLINE int |
| 100 | android_atomic_acquire_cas(int32_t old_value, |
| 101 | int32_t new_value, |
| 102 | volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 103 | { |
| 104 | int status = android_atomic_cas(old_value, new_value, ptr); |
| 105 | android_memory_barrier(); |
| 106 | return status; |
| 107 | } |
| 108 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 109 | extern ANDROID_ATOMIC_INLINE int |
| 110 | android_atomic_release_cas(int32_t old_value, |
| 111 | int32_t new_value, |
| 112 | volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 113 | { |
| 114 | android_memory_barrier(); |
| 115 | return android_atomic_cas(old_value, new_value, ptr); |
| 116 | } |
| 117 | |
| 118 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 119 | extern ANDROID_ATOMIC_INLINE int32_t |
| 120 | android_atomic_swap(int32_t new_value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 121 | { |
| 122 | int32_t prev, status; |
| 123 | do { |
| 124 | __asm__ __volatile__ ( |
| 125 | " move %[status], %[new_value]\n" |
| 126 | " ll %[prev], (%[ptr])\n" |
| 127 | " sc %[status], (%[ptr])\n" |
| 128 | : [prev] "=&r" (prev), [status] "=&r" (status) |
| 129 | : [ptr] "r" (ptr), [new_value] "r" (new_value) |
| 130 | ); |
| 131 | } while (__builtin_expect(status == 0, 0)); |
| 132 | android_memory_barrier(); |
| 133 | return prev; |
| 134 | } |
| 135 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 136 | extern ANDROID_ATOMIC_INLINE int32_t |
| 137 | android_atomic_add(int32_t increment, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 138 | { |
| 139 | int32_t prev, status; |
| 140 | android_memory_barrier(); |
| 141 | do { |
| 142 | __asm__ __volatile__ ( |
| 143 | " ll %[prev], (%[ptr])\n" |
| 144 | " addu %[status], %[prev], %[inc]\n" |
| 145 | " sc %[status], (%[ptr])\n" |
| 146 | : [status] "=&r" (status), [prev] "=&r" (prev) |
| 147 | : [ptr] "r" (ptr), [inc] "Ir" (increment) |
| 148 | ); |
| 149 | } while (__builtin_expect(status == 0, 0)); |
| 150 | return prev; |
| 151 | } |
| 152 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 153 | extern ANDROID_ATOMIC_INLINE int32_t |
| 154 | android_atomic_inc(volatile int32_t *addr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 155 | { |
| 156 | return android_atomic_add(1, addr); |
| 157 | } |
| 158 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 159 | extern ANDROID_ATOMIC_INLINE int32_t |
| 160 | android_atomic_dec(volatile int32_t *addr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 161 | { |
| 162 | return android_atomic_add(-1, addr); |
| 163 | } |
| 164 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 165 | extern ANDROID_ATOMIC_INLINE int32_t |
| 166 | android_atomic_and(int32_t value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 167 | { |
| 168 | int32_t prev, status; |
| 169 | android_memory_barrier(); |
| 170 | do { |
| 171 | __asm__ __volatile__ ( |
| 172 | " ll %[prev], (%[ptr])\n" |
| 173 | " and %[status], %[prev], %[value]\n" |
| 174 | " sc %[status], (%[ptr])\n" |
| 175 | : [prev] "=&r" (prev), [status] "=&r" (status) |
| 176 | : [ptr] "r" (ptr), [value] "Ir" (value) |
| 177 | ); |
| 178 | } while (__builtin_expect(status == 0, 0)); |
| 179 | return prev; |
| 180 | } |
| 181 | |
Ben Cheng | 5206d59 | 2012-12-07 10:54:09 -0800 | [diff] [blame] | 182 | extern ANDROID_ATOMIC_INLINE int32_t |
| 183 | android_atomic_or(int32_t value, volatile int32_t *ptr) |
Duane Sand | 0960411 | 2012-05-24 17:40:21 -0700 | [diff] [blame] | 184 | { |
| 185 | int32_t prev, status; |
| 186 | android_memory_barrier(); |
| 187 | do { |
| 188 | __asm__ __volatile__ ( |
| 189 | " ll %[prev], (%[ptr])\n" |
| 190 | " or %[status], %[prev], %[value]\n" |
| 191 | " sc %[status], (%[ptr])\n" |
| 192 | : [prev] "=&r" (prev), [status] "=&r" (status) |
| 193 | : [ptr] "r" (ptr), [value] "Ir" (value) |
| 194 | ); |
| 195 | } while (__builtin_expect(status == 0, 0)); |
| 196 | return prev; |
| 197 | } |
| 198 | |
| 199 | #endif /* ANDROID_CUTILS_ATOMIC_MIPS_H */ |