Switch NaCl code to use GCC intrinsics for atomic ops.

src/include/linux/x86/atomic_ops.h

Index: src/include/linux/x86/atomic_ops.h
diff --git a/src/include/linux/x86/atomic_ops.h b/src/include/linux/x86/atomic_ops.h
deleted file mode 100644
index fd0850a5d8c784c1dbdbde2cc788d0b5a345ba5a..0000000000000000000000000000000000000000
--- a/src/include/linux/x86/atomic_ops.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright 2008, Google Inc.
- * All rights reserved.
- *
- * 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.
- */
-
-
-#ifndef NATIVE_CLIENT_SRC_INCLUDE_LINUX_ATOMIC_OPS_LINUX_H_
-#define NATIVE_CLIENT_SRC_INCLUDE_LINUX_ATOMIC_OPS_LINUX_H_ 1
-
-#include "native_client/src/include/portability.h"
-#include <stdint.h>
-
-typedef int32_t Atomic32;
-
-static INLINE Atomic32 CompareAndSwap(volatile Atomic32* ptr,
-                                      Atomic32 old_value,
-                                      Atomic32 new_value) {
-  Atomic32 prev;
-  __asm__ __volatile__("lock; cmpxchgl %1,%2"
-                       : "=a" (prev)
-                       : "q" (new_value), "m" (*ptr), "0" (old_value)
-                       : "memory");
-  return prev;
-}
-
-
-static INLINE Atomic32 AtomicExchange(volatile Atomic32* ptr,
-                                      Atomic32 new_value) {
-  /* NOTE: The lock prefix is implicit for xchg. */
-  __asm__ __volatile__("xchgl %1,%0"
-                       : "=r" (new_value)
-                       : "m" (*ptr), "0" (new_value)
-                       : "memory");
-  return new_value;  /* Now it's the previous value. */
-}
-
-static INLINE Atomic32 AtomicIncrement(volatile Atomic32* ptr,
-                                       Atomic32 increment) {
-  Atomic32 temp = increment;
-  __asm__ __volatile__("lock; xaddl %0,%1"
-                       : "+r" (temp), "+m" (*ptr)
-                       : : "memory");
-  /* temp now contains the previous value of *ptr */
-  return temp + increment;
-}
-
-#endif  /* NATIVE_CLIENT_SRC_INCLUDE_LINUX_ATOMIC_OPS_LINUX_H_ */