File:  [gforth] / gforth / code.fs
Revision 1.4: download - view: text, annotated - select for diffs
Tue Jul 16 20:57:06 1996 UTC (25 years, 2 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
SPECIAL: to create special "state-smart" words

    1: \ ASSEMBLER, CODE etc.
    2: 
    3: \ Copyright (C) 1995 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation; either version 2
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program; if not, write to the Free Software
   19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20: 
   21: \ does not include the actual assembler (which is machine-dependent),
   22: \ only words like CODE that are implementation-dependent, but can be
   23: \ defined for all machines.
   24: 
   25: vocabulary assembler ( -- ) \ tools-ext
   26: 
   27: : init-asm ( -- )
   28:     also assembler ;
   29: 
   30: : code ( -- colon-sys )	\ tools-ext
   31:     \ start a native code definition
   32:     header here >body cfa, defstart init-asm ;
   33: 
   34: : (;code) ( -- ) \ gforth
   35:     \ execution semantics of @code{;code}
   36:     r> lastxt code-address! ;
   37: 
   38: :noname ( colon-sys1 -- colon-sys2 )	\ tools-ext	semicolon-code
   39:     ( create the [;code] part of a low level defining word )
   40:     ;-hook postpone (;code) ?struc postpone [
   41:     defstart init-asm ;
   42: :noname ( -- colon-sys )
   43:     align here lastxt code-address!
   44:     defstart init-asm ;
   45: special: ;code
   46: 
   47: : end-code ( colon-sys -- )	\ gforth	end_code
   48:     ( end a code definition )
   49:     lastxt here over - flush-icache
   50:     previous ?struc reveal ;

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