X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fppc%2Fsystem.lisp;h=b5ed227667b4b8409dd07ef5dae3b1c76a55168c;hb=d3705ad6676c19417b69cf38dd3667f6b3c3d2ef;hp=6a437e140eaccbca80faba0acd224bfcd474acda;hpb=52cfe54802db8736f1f4e2b67764c43bba9b78b3;p=sbcl.git

diff --git a/src/compiler/ppc/system.lisp b/src/compiler/ppc/system.lisp
index 6a437e1..b5ed227 100644
--- a/src/compiler/ppc/system.lisp
+++ b/src/compiler/ppc/system.lisp
@@ -121,15 +121,15 @@
     (move res x)))
 
 
-(define-vop (make-fixnum)
+(define-vop (pointer-hash)
+  (:translate pointer-hash)
   (:args (ptr :scs (any-reg descriptor-reg)))
   (:results (res :scs (any-reg descriptor-reg)))
+  (:policy :fast-safe)
   (:generator 1
-    ;;
-    ;; Some code (the hash table code) depends on this returning a
-    ;; positive number so make sure it does.
-    (inst slwi res ptr 3)
-    (inst srwi res res 1)))
+    ;; FIXME: It would be better if this would mask the lowtag,
+    ;; and shift the result into a positive fixnum like on x86.
+    (inst rlwinm res ptr n-fixnum-tag-bits 1 n-positive-fixnum-bits)))
 
 (define-vop (make-other-immediate-type)
   (:args (val :scs (any-reg descriptor-reg))