Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

base/atomicops_internals_arm64_gcc.h

Index: base/atomicops_internals_arm64_gcc.h
diff --git a/base/atomicops_internals_arm64_gcc.h b/base/atomicops_internals_arm64_gcc.h
deleted file mode 100644
index ddcfec901f937e22a07af93847e7833629a83976..0000000000000000000000000000000000000000
--- a/base/atomicops_internals_arm64_gcc.h
+++ /dev/null
@@ -1,307 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This file is an internal atomic implementation, use base/atomicops.h instead.
-
-// TODO(rmcilroy): Investigate whether we can use __sync__ intrinsics instead of
-//                 the hand coded assembly without introducing perf regressions.
-// TODO(rmcilroy): Investigate whether we can use acquire / release versions of
-//                 exclusive load / store assembly instructions and do away with
-//                 the barriers.
-
-#ifndef BASE_ATOMICOPS_INTERNALS_ARM64_GCC_H_
-#define BASE_ATOMICOPS_INTERNALS_ARM64_GCC_H_
-
-#if defined(OS_QNX)
-#include <sys/cpuinline.h>
-#endif
-
-namespace base {
-namespace subtle {
-
-inline void MemoryBarrier() {
-  __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) {
-  MemoryBarrier();
-  Atomic32 result = NoBarrier_AtomicIncrement(ptr, increment);
-  MemoryBarrier();
-
-  return result;
-}
-
-inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
-                                       Atomic32 old_value,
-                                       Atomic32 new_value) {
-  Atomic32 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
-  MemoryBarrier();
-
-  return prev;
-}
-
-inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
-                                       Atomic32 old_value,
-                                       Atomic32 new_value) {
-  MemoryBarrier();
-  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;
-  MemoryBarrier();
-}
-
-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) {
-  MemoryBarrier();
-  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) {
-  MemoryBarrier();
-  Atomic64 result = NoBarrier_AtomicIncrement(ptr, increment);
-  MemoryBarrier();
-
-  return result;
-}
-
-inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
-                                       Atomic64 old_value,
-                                       Atomic64 new_value) {
-  Atomic64 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
-  MemoryBarrier();
-
-  return prev;
-}
-
-inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
-                                       Atomic64 old_value,
-                                       Atomic64 new_value) {
-  MemoryBarrier();
-  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;
-  MemoryBarrier();
-}
-
-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) {
-  MemoryBarrier();
-  return *ptr;
-}
-
-}  // namespace subtle
-}  // namespace base
-
-#endif  // BASE_ATOMICOPS_INTERNALS_ARM64_GCC_H_