#| -*-Scheme-*-

$Id: inerly.scm,v 1.8 2003/02/14 18:28:07 cph Exp $

Copyright (c) 1988, 1989, 1990, 1999, 2001 Massachusetts Institute of Technology

This file is part of MIT/GNU Scheme.

MIT/GNU Scheme is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

MIT/GNU Scheme is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with MIT/GNU Scheme; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.

|#

;;; Spectrum Instruction Set Macros.  Early version
;;; NOPs for now.

(declare (usual-integrations))

(define-syntax define-instruction
  (non-hygienic-macro-transformer
   (lambda (opcode . patterns)
     `(SET! EARLY-INSTRUCTIONS
	    (CONS
	     (LIST ',opcode
		   ,@(map (lambda (pattern)
			    `(early-parse-rule
			      ',(car pattern)
			      (lambda (pat vars)
				(early-make-rule
				 pat
				 vars
				 (scode-quote
				  (instruction->instruction-sequence
				   ,(parse-instruction (cadr pattern)
						       (cddr pattern)
						       #t)))))))
			  patterns))
		  EARLY-INSTRUCTIONS)))))