home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 10 Tools
/
10-Tools.zip
/
mitsch75.zip
/
scheme-7_5_17-src.zip
/
scheme-7.5.17
/
src
/
compiler
/
etc
/
asm.scm
next >
Wrap
Text File
|
1999-01-02
|
2KB
|
67 lines
#| -*-Scheme-*-
$Id: asm.scm,v 1.3 1999/01/02 06:06:43 cph Exp $
Copyright (c) 1989-1999 Massachusetts Institute of Technology
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|#
;;;; Source (lap) assembler
(declare (usual-integrations))
;; To be loaded in (compiler top-level)
;;; Example of `lap->code' usage:
(define bar
;; defines bar to be a procedure that adds 1 to its argument
;; with no type or range checks.
(scode-eval
(lap->code
'start
`((pea (@pcr proc))
(or b (& ,(* (microcode-type 'compiled-entry) 4)) (@a 7))
(mov l (@a+ 7) (@ao 6 8))
(and b (& #x3) (@a 7))
(rts)
(dc uw #x0202)
(block-offset proc)
(label proc)
(mov l (@a+ 7) (d 0))
(addq l (& 1) (d 0))
(mov l (d 0) (@ao 6 8))
(and b (& #x3) (@a 7))
(rts)))
'()))
(define (lap->code label lap)
(in-compiler
(lambda ()
(set! *lap* lap)
(set! *entry-label* label)
(set! *current-label-number* 0)
(set! *next-constant* 0)
(set! *interned-constants* '())
(set! *interned-variables* '())
(set! *interned-assignments* '())
(set! *interned-uuo-links* '())
(set! *block-label* (generate-label))
(set! *external-labels* '())
(set! *ic-procedure-headers* '())
(phase/assemble)
(phase/link)
*result*)))