#if (defined(AO_PREFER_BUILTIN_ATOMICS) || !defined(__clang__) \
|| defined(__x86_64__) || defined(__APPLE_CC__) || defined(__CYGWIN__)) \
- && defined(AO_GCC_ATOMIC_TEST_AND_SET)
+ && defined(AO_GCC_ATOMIC_TEST_AND_SET) \
+ && !(defined(__APPLE_CC__) && defined(__x86_64__) && !defined(__ILP32__) \
+ && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16))
/* As of clang-3.8 i686 (NDK r11c), it requires -latomic for all the */
/* double-wide operations. For now, we fall back to the */
/* non-intrinsic implementation if clang/x86. */
+ /* As of Apple clang-600 (based on LLVM 3.5svn), it has some bug in */
+ /* double-wide CAS implementation for x64 target. */
/* TODO: Refine for newer clang releases. */
# if defined(__ILP32__) || !defined(__x86_64__) /* 32-bit AO_t */ \
/* doesn't work. And the emulation is unsafe by our usual rules. */
/* However both are clearly useful in certain cases. */
+# define AO_SKIPATOMIC_double_compare_and_swap_ANY
+
AO_INLINE int
AO_compare_double_and_swap_double_full(volatile AO_double_t *addr,
AO_t old_val1, AO_t old_val2,