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Annotation of gforth/asm/basic.fs, revision 1.8

1.1       pazsan      1: \ asmbasic.fs basic assebmler definitions
                      2: 
1.8     ! anton       3: \ Copyright (C) 1998,2000,2003,2007 Free Software Foundation, Inc.
1.3       anton       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
1.7       anton       9: \ as published by the Free Software Foundation, either version 3
1.3       anton      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
1.7       anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.3       anton      19: 
1.1       pazsan     20: [IFUNDEF] assembler Vocabulary assembler [THEN]
1.2       pazsan     21: require ./target.fs
1.1       pazsan     22: [IFUNDEF] chained require chains.fs [THEN]
                     23: 
                     24: \ ---------- Basic Definitions
                     25: 
                     26: \ (code) and (end-code) are used from interpreter or cross-compiler
                     27: \ Between (code) and (end-code) must be finished cpu-instructions
                     28: \ asm[ ... ]asm should or can be used to interrupt assembling
                     29: \ mode while assembling, the words should switch off and on
                     30: \ the assembler vocabulary or a special pasring mode
                     31: \ When using ]asm asm[ a cpu instruction has not to be finished
                     32: 
                     33: defer ]asm             \ turns on assembler mode
                     34: defer asm[             \ turns off assebmler mode
                     35: 
                     36: defer (code)           \ starts up a assembler passage
                     37: defer (end-code)       \ ends an assembler passage
                     38: 
                     39: \ Chains
                     40: 
                     41: \ Numref registers in propper8 (to reset some flags) and in
                     42: \ end-code8 (for resolving)
                     43: \ propper should be executed before at assembling start
                     44: \ and when an intstruction is finished.
                     45: 
                     46: Variable code8         \ starts assembling
                     47: 0 code8 !
                     48: 
                     49: Variable end-code8     \ ends assembling
                     50: 0 end-code8 !
                     51: 
                     52: Variable propper8      \ clean up flags for new cpu instructions
                     53: 0 propper8 !
                     54: 
                     55: : propper propper8 chainperform ;
                     56: 
                     57: : ]asm-1
                     58:   also assembler
                     59:   get-order >r = ABORT" Assembler is activated!"
                     60:   r> 2 - 0 ?DO drop LOOP 
                     61:   ;                    ' ]asm-1 IS ]asm
                     62: 
                     63: : asm[-1
                     64:   also assembler
                     65:   get-order >r <> ABORT" Assembler isn't activated!"
                     66:   r> 2 - 0 ?DO drop LOOP 
                     67:   previous previous ;          ' asm[-1 IS asm[
                     68: 
                     69: : (code)-1
                     70: \ the next input is assebler code witch is stored at dp  
                     71:   ]asm
                     72:   propper
                     73:   code8 chainperform 
                     74:   ;                    ' (code)-1 IS (code)
                     75: 
                     76: : (end-code)-1
                     77: \ the next code are normal forth definitions
                     78:   end-code8 chainperform
                     79:   asm[ ;               ' (end-code)-1 IS (end-code)
                     80: 
                     81: \ for test purposes
                     82: 
                     83: [IFUNDEF] there
                     84: : code create (code) ;
                     85: : end-code (end-code) ;
                     86: [THEN]
                     87: 
                     88: also assembler also definitions forth
                     89: 
                     90: variable asm-current
                     91: 
                     92: : end-label (end-code) asm-current @ set-current ;
                     93: : end-macros previous previous asm-current @ set-current ;
                     94: 
                     95: \ Macros
                     96: 
                     97: : : : ;
                     98: : ; postpone ; ; immediate
                     99: 
                    100: : label there constant ;
                    101: : equ   constant ;
                    102: 
                    103: forth definitions
                    104: 
                    105: : start-macros  get-current asm-current ! also forth also assembler definitions ;
                    106: : label         (code) label ;
                    107: 
                    108: previous previous