X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Farray.lisp;h=817bdb783c80e0e68733a28ea48910598024f6ff;hb=ee90e535c985f697c71d839083aed16710f846fd;hp=f41730b024743c166bb8d8204254f94d994d56a5;hpb=f94339428a65d2002f73086bcc6022885f656c1f;p=sbcl.git

diff --git a/src/code/array.lisp b/src/code/array.lisp
index f41730b..817bdb7 100644
--- a/src/code/array.lisp
+++ b/src/code/array.lisp
@@ -56,18 +56,6 @@
         (values vector index))
       (values array index)))
 
-(defun simple-vector-compare-and-swap (vector index old new)
-  #!+(or x86 x86-64)
-  (%simple-vector-compare-and-swap vector
-                                   (%check-bound vector (length vector) index)
-                                   old
-                                   new)
-  #!-(or x86 x86-64)
-  (let ((n-old (svref vector index)))
-    (when (eq old n-old)
-      (setf (svref vector index) new))
-    n-old))
-
 ;;; It'd waste space to expand copies of error handling in every
 ;;; inline %WITH-ARRAY-DATA, so we have them call this function
 ;;; instead. This is just a wrapper which is known never to return.
@@ -349,11 +337,7 @@ of specialized arrays is supported."
                             (:little-endian
                              (- sb!vm:other-pointer-lowtag))
                             (:big-endian
-                             ;; I'm not completely sure of what this
-                             ;; 3 represents symbolically. It's
-                             ;; just what all the LOAD-TYPE vops
-                             ;; are doing.
-                             (- 3 sb!vm:other-pointer-lowtag)))))
+                             (- (1- sb!vm:n-word-bytes) sb!vm:other-pointer-lowtag)))))
                    ;; WIDETAG-OF needs extra code to handle
                    ;; LIST and FUNCTION lowtags. We're only
                    ;; dispatching on other pointers, so let's
@@ -485,6 +469,9 @@ of specialized arrays is supported."
 (defun data-vector-ref (array index)
   (hairy-data-vector-ref array index))
 
+(defun data-vector-ref-with-offset (array index offset)
+  (hairy-data-vector-ref array (+ index offset)))
+
 ;;; SUBSCRIPTS has a dynamic-extent list structure and is destroyed
 (defun %array-row-major-index (array subscripts
                                      &optional (invalid-index-error-p t))