diff mbox series

Document atomic fetch and nand

Message ID 20190109063517.849-1-sebastian.huber@embedded-brains.de
State New
Headers show
Series Document atomic fetch and nand | expand

Commit Message

Sebastian Huber Jan. 9, 2019, 6:35 a.m. UTC 
Copy code example for fetch and nand from "Legacy __sync Built-in
Functions for Atomic Memory Access" to "Built-in Functions for Memory
Model Aware Atomic Operations".

gcc/

	* doc/extend.texi (Built-in Functions for Memory Model Aware
	Atomic Operations): Document atomic fetch and nand.
---
 gcc/doc/extend.texi | 2 ++
 1 file changed, 2 insertions(+)

Comments

Jeff Law Jan. 11, 2019, 8:26 p.m. UTC | #1 
On 1/8/19 11:35 PM, Sebastian Huber wrote:
> Copy code example for fetch and nand from "Legacy __sync Built-in
> Functions for Atomic Memory Access" to "Built-in Functions for Memory
> Model Aware Atomic Operations".
> 
> gcc/
> 
> 	* doc/extend.texi (Built-in Functions for Memory Model Aware
> 	Atomic Operations): Document atomic fetch and nand.
OK
jeff
diff mbox series

Patch

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 7f33be4f29c..f2a61e4c4f8 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -11008,6 +11008,7 @@  they are not scaled by the size of the type to which the pointer points.
 
 @smallexample
 @{ *ptr @var{op}= val; return *ptr; @}
+@{ *ptr = ~(*ptr & val); return *ptr; @} // nand
 @end smallexample
 
 The object pointed to by the first argument must be of integer or pointer
@@ -11029,6 +11030,7 @@  the type to which the pointer points.
 
 @smallexample
 @{ tmp = *ptr; *ptr @var{op}= val; return tmp; @}
+@{ tmp = *ptr; *ptr = ~(*ptr & val); return tmp; @} // nand
 @end smallexample
 
 The same constraints on arguments apply as for the corresponding