diff -uNr xen-unstable.hg-pristine/xen/arch/x86/hvm/vpic.c xen-unstable.hg-patched/xen/arch/x86/hvm/vpic.c
--- xen-unstable.hg-pristine/xen/arch/x86/hvm/vpic.c	2007-02-07 18:55:16.000000000 +0100
+++ xen-unstable.hg-patched/xen/arch/x86/hvm/vpic.c	2007-03-14 13:28:43.000000000 +0100
@@ -55,7 +55,7 @@
         return VPIC_PRIO_NONE;
 
     /* prio = ffs(mask ROL vpic->priority_add); */
-    asm ( "rol %%cl,%b1 ; bsf %1,%0"
+    asm ( "ror %%cl,%b1 ; bsf %1,%0"
           : "=r" (prio) : "r" ((uint32_t)mask), "c" (vpic->priority_add) );
     return prio;
 }