X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Falpha%2Fcall.lisp;h=c1ef107a83aac7b6d0098eee8ea53d2affbebe9a;hb=dbe82b489260b2ef76e916d0aeaee8b3850f5f52;hp=d62f5bda1238e506f2e553d7dc2ee1eb9d3061de;hpb=ca2d58fc8ab92eb5ab50ed4428af4b39866bd5f4;p=sbcl.git

diff --git a/src/compiler/alpha/call.lisp b/src/compiler/alpha/call.lisp
index d62f5bd..c1ef107 100644
--- a/src/compiler/alpha/call.lisp
+++ b/src/compiler/alpha/call.lisp
@@ -123,6 +123,24 @@
       (when nfp
         (inst addq nfp (bytes-needed-for-non-descriptor-stack-frame) val)))))
 
+;;; Accessing a slot from an earlier stack frame is definite hackery.
+(define-vop (ancestor-frame-ref)
+  (:args (frame-pointer :scs (descriptor-reg))
+         (variable-home-tn :load-if nil))
+  (:results (value :scs (descriptor-reg any-reg)))
+  (:policy :fast-safe)
+  (:generator 4
+    (aver (sc-is variable-home-tn control-stack))
+    (loadw value frame-pointer (tn-offset variable-home-tn))))
+(define-vop (ancestor-frame-set)
+  (:args (frame-pointer :scs (descriptor-reg))
+         (value :scs (descriptor-reg any-reg)))
+  (:results (variable-home-tn :load-if nil))
+  (:policy :fast-safe)
+  (:generator 4
+    (aver (sc-is variable-home-tn control-stack))
+    (storew value frame-pointer (tn-offset variable-home-tn))))
+
 (define-vop (xep-allocate-frame)
   (:info start-lab copy-more-arg-follows)
   (:ignore copy-more-arg-follows)