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+#| -*- Scheme -*-
+
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/mc68ktgl.scm,v 1.1 1991/03/24 23:53:02 jinx Exp $
+
+Copyright (c) 1991 Massachusetts Institute of Technology
+
+This material was developed by the Scheme project at the Massachusetts
+Institute of Technology, Department of Electrical Engineering and
+Computer Science.  Permission to copy this software, to redistribute
+it, and to use it for any purpose is granted, subject to the following
+restrictions and understandings.
+
+1. Any copy made of this software must include this copyright notice
+in full.
+
+2. Users of this software agree to make their best efforts (a) to
+return to the MIT Scheme project any improvements or extensions that
+they make, so that these may be included in future releases; and (b)
+to inform MIT of noteworthy uses of this software.
+
+3. All materials developed as a consequence of the use of this
+software shall duly acknowledge such use, in accordance with the usual
+standards of acknowledging credit in academic research.
+
+4. MIT has made no warrantee or representation that the operation of
+this software will be error-free, and MIT is under no obligation to
+provide any services, by way of maintenance, update, or otherwise.
+
+5. In conjunction with products arising from the use of this material,
+there shall be no use of the name of the Massachusetts Institute of
+Technology nor of any adaptation thereof in any advertising,
+promotional, or sales literature without prior written consent from
+MIT in each case. |#
+
+(declare (usual-integrations))
+\f
+(in-package (->environment '(compiler lap-syntaxer))
+  
+;; This procedure toggles the closure format for the mc68k back end.
+
+(define (mc68k/toggle-closure-format #!optional new-format)
+  (let ((new-format
+        (cond ((not (default-object? new-format))
+               new-format)
+              ((eq? MC68K/closure-format 'MC68020)
+               'MC68040)
+              (else
+               'MC68020))))
+    (if (not (eq? new-format MC68K/closure-format))
+       (case new-format
+         ((MC68020)
+          (set! mc68k/closure-format
+                'MC68020)
+          (set! closure-first-offset
+                MC68020/closure-first-offset)
+          (set! closure-object-first-offset
+                MC68020/closure-object-first-offset)
+          (set! closure-entry-distance
+                MC68020/closure-entry-distance)
+          (set! closure-environment-adjustment
+                MC68020/closure-environment-adjustment)
+          (set! generate/closure-header
+                MC68020/closure-header)
+          (set! generate/cons-closure
+                MC68020/cons-closure)
+          (set! generate/cons-multiclosure
+                MC68020/cons-multiclosure))
+         ((MC68040)
+          (set! mc68k/closure-format
+                'MC68040)
+          (set! closure-first-offset
+                MC68040/closure-first-offset)
+          (set! closure-object-first-offset
+                MC68040/closure-object-first-offset)
+          (set! closure-entry-distance
+                MC68040/closure-entry-distance)
+          (set! closure-environment-adjustment
+                MC68040/closure-environment-adjustment)
+          (set! generate/closure-header
+                MC68040/closure-header)
+          (set! generate/cons-closure
+                MC68040/cons-closure)
+          (set! generate/cons-multiclosure
+                MC68040/cons-multiclosure))
+         (error "MC68K/toggle-closure-format: Unknown format"
+                new-format)))
+    (warn "MC68K/closure-format is now" MC68K/closure-format)
+    MC68K/closure-format))
+
+) ;; End of in-package.