[Xen-changelog] [xen-unstable] minios: Optimize IA64's get_current()

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1200580761 0
# Node ID e51bf624433aa8439a6f5c6676bb79850a2cd1a8
# Parent  0a88a8fe5e97870302fa7b65d9a0b3a3f6bab3d1
minios: Optimize IA64's get_current()

Let gcc access r13 itself, leading to better code

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxx>
---
 extras/mini-os/include/ia64/arch_sched.h |    3 +--
 1 files changed, 1 insertion(+), 2 deletions(-)

diff -r 0a88a8fe5e97 -r e51bf624433a extras/mini-os/include/ia64/arch_sched.h
--- a/extras/mini-os/include/ia64/arch_sched.h  Thu Jan 17 13:03:22 2008 +0000
+++ b/extras/mini-os/include/ia64/arch_sched.h  Thu Jan 17 14:39:21 2008 +0000
@@ -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;
 }
 

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