Update ChangeLog

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+2012-03-07  Ivan Maidanski <ivmai@mail.ru>
+
+	* src/atomic_ops/sysdeps/gcc/x86.h
+	(AO_compare_double_and_swap_double_full): Use EDI register for
+	"new_val1" argument instead of a memory operand and use XCHG assembler
+	instruction instead of push/pop in case of PIC mode (to workaround
+	a bug in GCC 4.6.1); update the comment.
+
+2012-03-07  Ivan Maidanski <ivmai@mail.ru>
+
+	* src/atomic_ops_stack.c (AO_stack_push_release): Make "cptr" local
+	variable volatile to workaround a bug in clang-1.1/x86 compiler; add
+	comment.
+
+2012-03-07  Ivan Maidanski <ivmai@mail.ru>
+
+	* src/atomic_ops/sysdeps/gcc/x86.h
+	(AO_compare_double_and_swap_double_full): Fix argument name in the
+	comment.
+	* src/atomic_ops/sysdeps/sunc/x86.h
+	(AO_compare_double_and_swap_double_full): Likewise.
+
 2012-03-04  Ivan Maidanski <ivmai@mail.ru>
 
 	* src/atomic_ops_malloc.h (AO_malloc_enable_mmap): Fix a typo in the