Minor lowtag-handling cleanup in genesis.

[sbcl.git] / src / compiler / x86 / cell.lisp

diff --git a/src/compiler/x86/cell.lisp b/src/compiler/x86/cell.lisp
index d89f989..5be6b34 100644 (file)
--- a/src/compiler/x86/cell.lisp
+++ b/src/compiler/x86/cell.lisp
@@ -30,6 +30,8 @@
   (:generator 1
      (storew (encode-value-if-immediate value) object offset lowtag)))
 
+(define-vop (init-slot set-slot))
+
 (define-vop (compare-and-swap-slot)
   (:args (object :scs (descriptor-reg) :to :eval)
          (old :scs (descriptor-reg any-reg) :target eax)
@@ -418,6 +420,12 @@
 
 (define-vop (closure-init slot-set)
   (:variant closure-info-offset fun-pointer-lowtag))
+
+(define-vop (closure-init-from-fp)
+  (:args (object :scs (descriptor-reg)))
+  (:info offset)
+  (:generator 4
+    (storew ebp-tn object (+ closure-info-offset offset) fun-pointer-lowtag)))
 \f
 ;;;; value cell hackery
 
@@ -540,8 +548,8 @@
   (:policy :fast-safe)
   (:args (object :scs (descriptor-reg))
          (index :scs (any-reg immediate))
-         (diff :scs (signed-reg) :target result))
-  (:arg-types * tagged-num signed-num)
+         (diff :scs (unsigned-reg) :target result))
+  (:arg-types * tagged-num unsigned-num)
   (:temporary (:sc unsigned-reg) tmp)
   (:results (result :scs (unsigned-reg)))
   (:result-types unsigned-num)