Annotation of gforth/code.fs, revision 1.2

1.1       anton       1: \ ASSEMBLER, CODE etc.
                      2: 
1.2     ! anton       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: 
1.1       anton      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: : ;code ( colon-sys1 -- colon-sys2 )   \ tools-ext     semicolon-code
                     39:     ( create the [;code] part of a low level defining word )
                     40:     state @
                     41:     IF
                     42:        ;-hook postpone (;code) ?struc postpone [
                     43:     ELSE
                     44:        align here lastxt code-address!
                     45:     THEN
                     46:     defstart init-asm ; immediate
                     47: 
                     48: : end-code ( colon-sys -- )    \ gforth        end_code
                     49:     ( end a code definition )
                     50:     lastxt here over - flush-icache
                     51:     previous ?struc reveal ;

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