| Message ID | 1352473455-12009-1-git-send-email-andi@firstfloor.org |
|---|---|
| State | New |
| Headers | show |
On Fri, Nov 09, 2012 at 04:04:15PM +0100, Andi Kleen wrote: > +Additional target specific flags that can be ored with the memory models. > +@table @code > +@item __ATOMIC_HLE_ACQUIRE > +(on i386/x86_64). Start a Hardware Lock Elision transaction with the atomic > +operation. The memory model must be @code{__ATOMIC_ACQUIRE} or stronger. Two spaces after . instead of just one. > +@item __ATOMIC_HLE_RELEASE > +(on i386/x86_64). Commit a Hardware Lock Elision transaction with the atomic > +operation. The memory model must be @code{__ATOMIC_RELEASE} or stronger. > +@end table > + > When implementing patterns for these built-in functions, the memory model > parameter can be ignored as long as the pattern implements the most > restrictive @code{__ATOMIC_SEQ_CST} model. Any of the other memory models Jakub
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 54fd548..248977d 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -7194,6 +7194,16 @@ Full barrier in both directions and synchronizes with acquire loads and release stores in all threads. @end table +Additional target specific flags that can be ored with the memory models. +@table @code +@item __ATOMIC_HLE_ACQUIRE +(on i386/x86_64). Start a Hardware Lock Elision transaction with the atomic +operation. The memory model must be @code{__ATOMIC_ACQUIRE} or stronger. +@item __ATOMIC_HLE_RELEASE +(on i386/x86_64). Commit a Hardware Lock Elision transaction with the atomic +operation. The memory model must be @code{__ATOMIC_RELEASE} or stronger. +@end table + When implementing patterns for these built-in functions, the memory model parameter can be ignored as long as the pattern implements the most restrictive @code{__ATOMIC_SEQ_CST} model. Any of the other memory models
From: Andi Kleen <ak@linux.intel.com> Make a first stab at the undocumented HLE_ACQUIRE/RELEASE memory model modifiers in the documentation gcc/: 2012-11-09 Andi Kleen <ak@linux.intel.com> * doc/extend.texi: Document __ATOMIC_HLE_ACQUIRE and RELEASE. --- gcc/doc/extend.texi | 10 ++++++++++ 1 file changed, 10 insertions(+)