0.pre8.33

[sbcl.git] / src / compiler / ppc / system.lisp

diff --git a/src/compiler/ppc/system.lisp b/src/compiler/ppc/system.lisp
index aa245b0..3366e10 100644 (file)
--- a/src/compiler/ppc/system.lisp
+++ b/src/compiler/ppc/system.lisp
@@ -213,6 +213,22 @@
   (:generator 1
     (inst unimp pending-interrupt-trap)))
 
+(defknown current-thread-offset-sap ((unsigned-byte 32))  
+  system-area-pointer (flushable))
+
+(define-vop (current-thread-offset-sap)
+  (:results (sap :scs (sap-reg)))
+  (:result-types system-area-pointer)
+  (:translate current-thread-offset-sap)
+  (:args (n :scs (unsigned-reg) ))
+  (:temporary (:sc unsigned-reg :target sap) temp1)
+  (:temporary (:sc unsigned-reg) temp2)
+  (:arg-types unsigned-num)
+  (:policy :fast-safe)
+  (:generator 3
+    (inst slwi n temp1 2)
+    (inst lr temp2 (make-fixup (extern-alien-name "all_threads") :foreign))
+    (inst lwzx sap temp1 temp2)))
 
 (define-vop (halt)
   (:generator 1