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Diffstat (limited to 'src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h')
-rw-r--r-- | src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h b/src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h deleted file mode 100644 index 9a69d21a..00000000 --- a/src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h +++ /dev/null @@ -1,325 +0,0 @@ -// Protocol Buffers - Google's data interchange format -// Copyright 2012 Google Inc. All rights reserved. -// https://developers.google.com/protocol-buffers/ -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following disclaimer -// in the documentation and/or other materials provided with the -// distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -// This file is an internal atomic implementation, use atomicops.h instead. - -#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_ -#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_ - -namespace google { -namespace protobuf { -namespace internal { - -inline void MemoryBarrierInternal() { - __asm__ __volatile__ ("dmb ish" ::: "memory"); // NOLINT -} - -// NoBarrier versions of the operation include "memory" in the clobber list. -// This is not required for direct usage of the NoBarrier versions of the -// operations. However this is required for correctness when they are used as -// part of the Acquire or Release versions, to ensure that nothing from outside -// the call is reordered between the operation and the memory barrier. This does -// not change the code generated, so has no or minimal impact on the -// NoBarrier operations. - -inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, - Atomic32 old_value, - Atomic32 new_value) { - Atomic32 prev; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %w[prev], %[ptr] \n\t" // Load the previous value. - "cmp %w[prev], %w[old_value] \n\t" - "bne 1f \n\t" - "stxr %w[temp], %w[new_value], %[ptr] \n\t" // Try to store the new value. - "cbnz %w[temp], 0b \n\t" // Retry if it did not work. - "1: \n\t" - : [prev]"=&r" (prev), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [old_value]"IJr" (old_value), - [new_value]"r" (new_value) - : "cc", "memory" - ); // NOLINT - - return prev; -} - -inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, - Atomic32 new_value) { - Atomic32 result; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %w[result], %[ptr] \n\t" // Load the previous value. - "stxr %w[temp], %w[new_value], %[ptr] \n\t" // Try to store the new value. - "cbnz %w[temp], 0b \n\t" // Retry if it did not work. - : [result]"=&r" (result), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [new_value]"r" (new_value) - : "memory" - ); // NOLINT - - return result; -} - -inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, - Atomic32 increment) { - Atomic32 result; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %w[result], %[ptr] \n\t" // Load the previous value. - "add %w[result], %w[result], %w[increment]\n\t" - "stxr %w[temp], %w[result], %[ptr] \n\t" // Try to store the result. - "cbnz %w[temp], 0b \n\t" // Retry on failure. - : [result]"=&r" (result), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [increment]"IJr" (increment) - : "memory" - ); // NOLINT - - return result; -} - -inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, - Atomic32 increment) { - MemoryBarrierInternal(); - Atomic32 result = NoBarrier_AtomicIncrement(ptr, increment); - MemoryBarrierInternal(); - - return result; -} - -inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, - Atomic32 old_value, - Atomic32 new_value) { - Atomic32 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value); - MemoryBarrierInternal(); - - return prev; -} - -inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, - Atomic32 old_value, - Atomic32 new_value) { - MemoryBarrierInternal(); - Atomic32 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value); - - return prev; -} - -inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { - *ptr = value; -} - -inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { - *ptr = value; - MemoryBarrierInternal(); -} - -inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { - __asm__ __volatile__ ( // NOLINT - "stlr %w[value], %[ptr] \n\t" - : [ptr]"=Q" (*ptr) - : [value]"r" (value) - : "memory" - ); // NOLINT -} - -inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { - return *ptr; -} - -inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { - Atomic32 value; - - __asm__ __volatile__ ( // NOLINT - "ldar %w[value], %[ptr] \n\t" - : [value]"=r" (value) - : [ptr]"Q" (*ptr) - : "memory" - ); // NOLINT - - return value; -} - -inline Atomic32 Release_Load(volatile const Atomic32* ptr) { - MemoryBarrierInternal(); - return *ptr; -} - -// 64-bit versions of the operations. -// See the 32-bit versions for comments. - -inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, - Atomic64 old_value, - Atomic64 new_value) { - Atomic64 prev; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %[prev], %[ptr] \n\t" - "cmp %[prev], %[old_value] \n\t" - "bne 1f \n\t" - "stxr %w[temp], %[new_value], %[ptr] \n\t" - "cbnz %w[temp], 0b \n\t" - "1: \n\t" - : [prev]"=&r" (prev), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [old_value]"IJr" (old_value), - [new_value]"r" (new_value) - : "cc", "memory" - ); // NOLINT - - return prev; -} - -inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, - Atomic64 new_value) { - Atomic64 result; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %[result], %[ptr] \n\t" - "stxr %w[temp], %[new_value], %[ptr] \n\t" - "cbnz %w[temp], 0b \n\t" - : [result]"=&r" (result), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [new_value]"r" (new_value) - : "memory" - ); // NOLINT - - return result; -} - -inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, - Atomic64 increment) { - Atomic64 result; - int32_t temp; - - __asm__ __volatile__ ( // NOLINT - "0: \n\t" - "ldxr %[result], %[ptr] \n\t" - "add %[result], %[result], %[increment] \n\t" - "stxr %w[temp], %[result], %[ptr] \n\t" - "cbnz %w[temp], 0b \n\t" - : [result]"=&r" (result), - [temp]"=&r" (temp), - [ptr]"+Q" (*ptr) - : [increment]"IJr" (increment) - : "memory" - ); // NOLINT - - return result; -} - -inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, - Atomic64 increment) { - MemoryBarrierInternal(); - Atomic64 result = NoBarrier_AtomicIncrement(ptr, increment); - MemoryBarrierInternal(); - - return result; -} - -inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, - Atomic64 old_value, - Atomic64 new_value) { - Atomic64 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value); - MemoryBarrierInternal(); - - return prev; -} - -inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, - Atomic64 old_value, - Atomic64 new_value) { - MemoryBarrierInternal(); - Atomic64 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value); - - return prev; -} - -inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { - *ptr = value; -} - -inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { - *ptr = value; - MemoryBarrierInternal(); -} - -inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { - __asm__ __volatile__ ( // NOLINT - "stlr %x[value], %[ptr] \n\t" - : [ptr]"=Q" (*ptr) - : [value]"r" (value) - : "memory" - ); // NOLINT -} - -inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { - return *ptr; -} - -inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { - Atomic64 value; - - __asm__ __volatile__ ( // NOLINT - "ldar %x[value], %[ptr] \n\t" - : [value]"=r" (value) - : [ptr]"Q" (*ptr) - : "memory" - ); // NOLINT - - return value; -} - -inline Atomic64 Release_Load(volatile const Atomic64* ptr) { - MemoryBarrierInternal(); - return *ptr; -} - -} // namespace internal -} // namespace protobuf -} // namespace google - -#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_ |