Re: [SPARC] Tweak libgomp's cpu_relax

2012-03-01 Thread David Miller 
From: Eric Botcazou ebotca...@adacore.com
Date: Wed, 29 Feb 2012 21:48:57 +0100

 As discussed with DaveM, this duplicates libitm's cpu_relax into libgomp.
 
 Tested on SPARC64/Linux, applied on the mainline.

Thanks for taking care of this Eric.

[SPARC] Tweak libgomp's cpu_relax

2012-02-29 Thread Eric Botcazou 
As discussed with DaveM, this duplicates libitm's cpu_relax into libgomp.

Tested on SPARC64/Linux, applied on the mainline.


2012-02-29  Eric Botcazou  ebotca...@adacore.com

* config/linux/sparc/futex.h (cpu_relax): Read from CC register.


-- 
Eric Botcazou
Index: config/linux/sparc/futex.h
===
--- config/linux/sparc/futex.h	(revision 184585)
+++ config/linux/sparc/futex.h	(working copy)
@@ -90,9 +90,5 @@ futex_wake (int *addr, int count)
 static inline void
 cpu_relax (void)
 {
-#if defined __arch64__ || defined  __sparc_v9__
-  __asm volatile (membar #LoadLoad : : : memory);
-#else
-  __asm volatile ( : : : memory);
-#endif
+  __asm volatile (rd %%ccr, %%g0 : : : memory);
 }