* src/atomic_ops/sysdeps/sunc/x86.h (AO_test_and_set_full): Fix
"xchg" data size (remove "l" suffix).
* src/atomic_ops/sysdeps/sunc/x86_64.h (AO_test_and_set_full):
Ditto.
* src/atomic_ops/sysdeps/sunc/x86_64.h (AO_test_and_set_full): Use
AO_TS_t for oldval.
* src/atomic_ops/sysdeps/sunc/x86.h
(AO_compare_double_and_swap_double_full,
AO_HAVE_compare_double_and_swap_double_full): Comment out (since
not tested, might be wrong, and tickles a bug in some Sun CC
versions; besides, __PIC__ macro is never predefined by Sun CC).