diff options
Diffstat (limited to 'libc/private/bionic_atomic_mips.h')
| -rw-r--r-- | libc/private/bionic_atomic_mips.h | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/libc/private/bionic_atomic_mips.h b/libc/private/bionic_atomic_mips.h deleted file mode 100644 index 5e08116..0000000 --- a/libc/private/bionic_atomic_mips.h +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Copyright (C) 2011 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef BIONIC_ATOMIC_MIPS_H -#define BIONIC_ATOMIC_MIPS_H - -/* Define a full memory barrier, this is only needed if we build the - * platform for a multi-core device. - */ - -__ATOMIC_INLINE__ void __bionic_memory_barrier() { -#if defined(ANDROID_SMP) && ANDROID_SMP == 1 - __asm__ __volatile__ ( "sync" : : : "memory" ); -#else - /* A simple compiler barrier. */ - __asm__ __volatile__ ( "" : : : "memory" ); -#endif -} - -/* Compare-and-swap, without any explicit barriers. Note that this function - * returns 0 on success, and 1 on failure. The opposite convention is typically - * used on other platforms. - */ -__ATOMIC_INLINE__ int __bionic_cmpxchg(int32_t old_value, int32_t new_value, volatile int32_t* ptr) { - int32_t prev, status; - __asm__ __volatile__ ("1: move %[status], %[new_value] \n" - " ll %[prev], 0(%[ptr]) \n" - " bne %[old_value], %[prev], 2f \n" - " sc %[status], 0(%[ptr]) \n" - " beqz %[status], 1b \n" - "2: \n" - : [prev]"=&r"(prev), [status]"=&r"(status), "+m"(*ptr) - : [new_value]"r"(new_value), [old_value]"r"(old_value), [ptr]"r"(ptr) - : "memory"); - return prev != old_value; -} - -/* Swap, without any explicit barriers. */ -__ATOMIC_INLINE__ int32_t __bionic_swap(int32_t new_value, volatile int32_t* ptr) { - int32_t prev, status; - __asm__ __volatile__ ("1: move %[status], %[new_value] \n" - " ll %[prev], 0(%[ptr]) \n" - " sc %[status], 0(%[ptr]) \n" - " beqz %[status], 1b \n" - : [prev]"=&r"(prev), [status]"=&r"(status), "+m"(*ptr) - : [ptr]"r"(ptr), [new_value]"r"(new_value) - : "memory"); - return prev; -} - -/* Atomic decrement, without explicit barriers. */ -__ATOMIC_INLINE__ int32_t __bionic_atomic_dec(volatile int32_t* ptr) { - int32_t prev, status; - __asm__ __volatile__ ("1: ll %[prev], 0(%[ptr]) \n" - " addiu %[status], %[prev], -1 \n" - " sc %[status], 0(%[ptr]) \n" - " beqz %[status], 1b \n" - : [prev]"=&r" (prev), [status]"=&r"(status), "+m" (*ptr) - : [ptr]"r"(ptr) - : "memory"); - return prev; -} - -#endif /* BIONIC_ATOMIC_MIPS_H */ |