Index: /trunk/source/compiler/ARM/arm-asm.lisp
===================================================================
--- /trunk/source/compiler/ARM/arm-asm.lisp	(revision 14401)
+++ /trunk/source/compiler/ARM/arm-asm.lisp	(revision 14402)
@@ -182,4 +182,16 @@
      #xffffffff
      (:non-conditional))
+   (define-arm-instruction isb ()
+     #xf57ff06f
+     #xffffffff
+     (:non-conditional))
+   (define-arm-instruction dmb ()
+     #xf57ff05f
+     #xffffffff
+     (:non-conditional))
+   (define-arm-instruction dsb ()
+     #xf57ff04f
+     #xffffffff
+     (:non-conditional))   
    
 ;;; UUOs.