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extend.texi: Document __atomic_test_and_set and __atomic_clear.

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2011-11-10  Andrew MacLeod  <amacleod@redhat.com>

	* doc/extend.texi: Document __atomic_test_and_set and __atomic_clear.

From-SVN: r181273
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Andrew MacLeod 2011-11-10 22:46:25 +00:00 committed by Andrew Macleod
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@ -1,3 +1,7 @@
2011-11-10 Andrew MacLeod <amacleod@redhat.com>
* doc/extend.texi: Document __atomic_test_and_set and __atomic_clear.
2011-11-10 Andrew MacLeod <amacleod@redhat.com>
PR middle-end/51038

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gcc/doc/extend.texi
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@ -7002,6 +7002,27 @@ All memory models are valid.
@end deftypefn
@deftypefn {Built-in Function} bool __atomic_test_and_set (bool *ptr, int memmodel)
This built-in function performs an atomic test-and-set operation on
@code{*@var{ptr}}. @code{*@var{ptr}} is set to the value 1 and
the previous contents are returned.
All memory models are valid.
@end deftypefn
@deftypefn {Built-in Function} void __atomic_clear (bool *ptr, int memmodel)
This built-in function performs an atomic clear operation on
@code{*@var{ptr}}. After the operation, @code{*@var{ptr}} will contain 0.
The valid memory model variants are
@code{__ATOMIC_RELAXED}, @code{__ATOMIC_SEQ_CST}, and
@code{__ATOMIC_RELEASE}.
@end deftypefn
@deftypefn {Built-in Function} void __atomic_thread_fence (int memmodel)
This built-in function acts as a synchronization fence between threads