Optimize IA64's get_current()

PATCH New Samuel Thibault 1 participant 1 message Jan 17, 2008

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Samuel Thibault

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2008-01-17 13:29 UTC #0 lore raw

PATCH 1/1 Optimize IA64's get_current()

Let gcc access r13 itself, leading to better code

Signed-off-by Samuel Thibault <[email protected]>

extras/mini-os/include/ia64/arch_sched.h +1 -2

diff -r a66bdc82d8fa extras/mini-os/include/ia64/arch_sched.h
@@ -82,8 +82,7 @@ void arch_switch_threads(struct thread* 
 
 static inline struct thread* get_current(void)
 {
-	struct thread *current;
-	__asm ("mov %0=r13" : "=r" (current));
+	register struct thread *current asm("r13");
 	return current;
 }