File:  [gforth] / gforth / cross.fs
Revision 1.90: download - view: text, annotated - select for diffs
Sun Jan 28 22:43:39 2001 UTC (18 years, 10 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Fixed cell-size dependent masks

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ Idea and implementation: Bernd Paysan (py)
    3: 
    4: \ Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc.
    5: 
    6: \ This file is part of Gforth.
    7: 
    8: \ Gforth is free software; you can redistribute it and/or
    9: \ modify it under the terms of the GNU General Public License
   10: \ as published by the Free Software Foundation; either version 2
   11: \ of the License, or (at your option) any later version.
   12: 
   13: \ This program is distributed in the hope that it will be useful,
   14: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   15: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   16: \ GNU General Public License for more details.
   17: 
   18: \ You should have received a copy of the GNU General Public License
   19: \ along with this program; if not, write to the Free Software
   20: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   21: 
   22: 0 
   23: [IF]
   24: 
   25: ToDo:
   26: Crossdoc destination ./doc/crossdoc.fd makes no sense when
   27: cross.fs is uses seperately. jaw
   28: Do we need this char translation with >address and in branchoffset? 
   29: (>body also affected) jaw
   30: Clean up mark> and >resolve stuff jaw
   31: 
   32: [THEN]
   33: 
   34: hex
   35: 
   36: \ debugging for compiling
   37: 
   38: \ print stack at each colon definition
   39: \ : : save-input cr bl word count type restore-input throw .s : ;
   40: 
   41: \ print stack at each created word
   42: \ : create save-input cr bl word count type restore-input throw .s create ;
   43: 
   44: 
   45: \ \ -------------  Setup Vocabularies
   46: 
   47: \ Remark: Vocabulary is not ANS, but it should work...
   48: 
   49: Vocabulary Cross
   50: Vocabulary Target
   51: Vocabulary Ghosts
   52: Vocabulary Minimal
   53: only Forth also Target also also
   54: definitions Forth
   55: 
   56: : T  previous Ghosts also Target ; immediate
   57: : G  Ghosts ; immediate
   58: : H  previous Forth also Cross ; immediate
   59: 
   60: forth definitions
   61: 
   62: : T  previous Ghosts also Target ; immediate
   63: : G  Ghosts ; immediate
   64: 
   65: : >cross  also Cross definitions previous ;
   66: : >target also Target definitions previous ;
   67: : >minimal also Minimal definitions previous ;
   68: 
   69: H
   70: 
   71: >CROSS
   72: 
   73: \ find out whether we are compiling with gforth
   74: 
   75: : defined? bl word find nip ;
   76: defined? emit-file defined? toupper and \ drop 0
   77: [IF]
   78: \ use this in a gforth system
   79: : \GFORTH ; immediate
   80: : \ANSI postpone \ ; immediate
   81: [ELSE]
   82: : \GFORTH postpone \ ; immediate
   83: : \ANSI ; immediate
   84: [THEN]
   85: 
   86: \ANSI : [IFUNDEF] defined? 0= postpone [IF] ; immediate
   87: \ANSI : [IFDEF] defined? postpone [IF] ; immediate
   88: 0 \ANSI drop 1
   89: [IF]
   90: : \G postpone \ ; immediate
   91: : rdrop postpone r> postpone drop ; immediate
   92: : name bl word count ;
   93: : bounds over + swap ;
   94: : scan >r BEGIN dup WHILE over c@ r@ <> WHILE 1 /string REPEAT THEN rdrop ;
   95: : linked here over @ , swap ! ;
   96: : alias create , DOES> @ EXECUTE ;
   97: : defer ['] noop alias ;
   98: : is state @ 
   99:   IF ' >body postpone literal postpone ! 
  100:   ELSE ' >body ! THEN ; immediate
  101: : 0>= 0< 0= ;
  102: : d<> rot <> -rot <> or ;
  103: : toupper dup [char] a [char] z 1+ within IF [char] A [char] a - + THEN ;
  104: Variable ebuf
  105: : emit-file ( c fd -- ior ) swap ebuf c! ebuf 1 chars rot write-file ;
  106: 0a Constant #lf
  107: 0d Constant #cr
  108: 
  109: [IFUNDEF] Warnings Variable Warnings [THEN]
  110: 
  111: \ \ Number parsing					23feb93py
  112: 
  113: \ number? number                                       23feb93py
  114: 
  115: Variable dpl
  116: 
  117: hex
  118: Create bases   10 ,   2 ,   A , 100 ,
  119: \              16     2    10   character
  120: 
  121: \ !! protect BASE saving wrapper against exceptions
  122: : getbase ( addr u -- addr' u' )
  123:     over c@ [char] $ - dup 4 u<
  124:     IF
  125: 	cells bases + @ base ! 1 /string
  126:     ELSE
  127: 	drop
  128:     THEN ;
  129: 
  130: : sign? ( addr u -- addr u flag )
  131:     over c@ [char] - =  dup >r
  132:     IF
  133: 	1 /string
  134:     THEN
  135:     r> ;
  136: 
  137: : s>unumber? ( addr u -- ud flag )
  138:     over [char] ' =
  139:     IF 	\ a ' alone is rather unusual :-)
  140: 	drop char+ c@ 0 true EXIT 
  141:     THEN
  142:     base @ >r  dpl on  getbase
  143:     0. 2swap
  144:     BEGIN ( d addr len )
  145: 	dup >r >number dup
  146:     WHILE \ there are characters left
  147: 	dup r> -
  148:     WHILE \ the last >number parsed something
  149: 	dup 1- dpl ! over c@ [char] . =
  150:     WHILE \ the current char is '.'
  151: 	1 /string
  152:     REPEAT  THEN \ there are unparseable characters left
  153: 	2drop false
  154:     ELSE
  155: 	rdrop 2drop true
  156:     THEN
  157:     r> base ! ;
  158: 
  159: \ ouch, this is complicated; there must be a simpler way - anton
  160: : s>number? ( addr len -- d f )
  161:     \ converts string addr len into d, flag indicates success
  162:     sign? >r
  163:     s>unumber?
  164:     0= IF
  165:         rdrop false
  166:     ELSE \ no characters left, all ok
  167: 	r>
  168: 	IF
  169: 	    dnegate
  170: 	THEN
  171: 	true
  172:     THEN ;
  173: 
  174: : s>number ( addr len -- d )
  175:     \ don't use this, there is no way to tell success
  176:     s>number? drop ;
  177: 
  178: : snumber? ( c-addr u -- 0 / n -1 / d 0> )
  179:     s>number? 0=
  180:     IF
  181: 	2drop false  EXIT
  182:     THEN
  183:     dpl @ dup 0< IF
  184: 	nip
  185:     ELSE
  186: 	1+
  187:     THEN ;
  188: 
  189: : number? ( string -- string 0 / n -1 / d 0> )
  190:     dup >r count snumber? dup if
  191: 	rdrop
  192:     else
  193: 	r> swap
  194:     then ;
  195: 
  196: : number ( string -- d )
  197:     number? ?dup 0= abort" ?"  0<
  198:     IF
  199: 	s>d
  200:     THEN ;
  201: 
  202: [THEN]
  203: 
  204: hex     \ the defualt base for the cross-compiler is hex !!
  205: \ Warnings off
  206: 
  207: \ words that are generaly useful
  208: 
  209: : KB  400 * ;
  210: : >wordlist ( vocabulary-xt -- wordlist-struct )
  211:   also execute get-order swap >r 1- set-order r> ;
  212: 
  213: : umax 2dup u< IF swap THEN drop ;
  214: : umin 2dup u> IF swap THEN drop ;
  215: 
  216: : string, ( c-addr u -- )
  217:     \ puts down string as cstring
  218:     dup c, here swap chars dup allot move ;
  219: 
  220: : ," [char] " parse string, ;
  221: 
  222: : SetValue ( n -- <name> )
  223: \G Same behaviour as "Value" if the <name> is not defined
  224: \G Same behaviour as "to" if <name> is defined
  225: \G SetValue searches in the current vocabulary
  226:   save-input bl word >r restore-input throw r> count
  227:   get-current search-wordlist
  228:   IF	drop >r
  229: 	\ we have to set current to be topmost context wordlist
  230: 	get-order get-order get-current swap 1+ set-order
  231: 	r> ['] to execute
  232: 	set-order
  233:   ELSE Value THEN ;
  234: 
  235: : DefaultValue ( n -- <name> )
  236: \G Same behaviour as "Value" if the <name> is not defined
  237: \G DefaultValue searches in the current vocabulary
  238:  save-input bl word >r restore-input throw r> count
  239:  get-current search-wordlist
  240:  IF bl word drop 2drop ELSE Value THEN ;
  241: 
  242: hex
  243: 
  244: \ 1 Constant Cross-Flag	\ to check whether assembler compiler plug-ins are
  245: 			\ for cross-compiling
  246: \ No! we use "[IFUNDEF]" there to find out whether we are target compiling!!!
  247: 
  248: : comment? ( c-addr u -- c-addr u )
  249:         2dup s" (" compare 0=
  250:         IF    postpone (
  251:         ELSE  2dup s" \" compare 0= IF postpone \ THEN
  252:         THEN ;
  253: 
  254: \ Begin CROSS COMPILER:
  255: 
  256: \ debugging
  257: 
  258: 0 [IF]
  259: 
  260: This implements debugflags for the cross compiler and the compiled
  261: images. It works identical to the has-flags in the environment.
  262: The debugflags are defined in a vocabluary. If the word exists and
  263: its value is true, the flag is switched on.
  264: 
  265: [THEN]
  266: 
  267: >CROSS
  268: 
  269: Vocabulary debugflags	\ debug flags for cross
  270: also debugflags get-order over
  271: Constant debugflags-wl
  272: set-order previous
  273: 
  274: : DebugFlag
  275:   get-current >r debugflags-wl set-current
  276:   SetValue
  277:   r> set-current ;
  278: 
  279: : Debug? ( adr u -- flag )
  280: \G return true if debug flag is defined or switched on
  281:   debugflags-wl search-wordlist
  282:   IF EXECUTE
  283:   ELSE false THEN ;
  284: 
  285: : D? ( <name> -- flag )
  286: \G return true if debug flag is defined or switched on
  287: \G while compiling we do not return the current value but
  288:   bl word count debug? ;
  289: 
  290: : [d?]
  291: \G compile the value-xt so the debug flag can be switched
  292: \G the flag must exist!
  293:   bl word count debugflags-wl search-wordlist
  294:   IF 	compile,
  295:   ELSE  -1 ABORT" unknown debug flag"
  296: 	\ POSTPONE false 
  297:   THEN ; immediate
  298: 
  299: \ \ --------------------	source file
  300: 
  301: decimal
  302: 
  303: Variable cross-file-list
  304: 0 cross-file-list !
  305: Variable target-file-list
  306: 0 target-file-list !
  307: Variable host-file-list
  308: 0 host-file-list !
  309: 
  310: cross-file-list Value file-list
  311: 0 Value source-desc
  312: 
  313: \ file loading
  314: 
  315: : >fl-id   1 cells + ;
  316: : >fl-name 2 cells + ;
  317: 
  318: Variable filelist 0 filelist !
  319: Create NoFile ," #load-file#"
  320: 
  321: : loadfile ( -- adr )
  322:   source-desc ?dup IF >fl-name ELSE NoFile THEN ;
  323: 
  324: : sourcefilename ( -- adr len ) 
  325:   loadfile count ;
  326: 
  327: \ANSI : sourceline# 0 ;
  328: 
  329: \ \ --------------------	path handling from kernel/paths.fs
  330: 
  331: \ paths.fs path file handling                                    03may97jaw
  332: 
  333: \ -Changing the search-path:
  334: \ fpath+ <path> 	adds a directory to the searchpath
  335: \ fpath= <path>|<path>	makes complete now searchpath
  336: \ 			seperator is |
  337: \ .fpath		displays the search path
  338: \ remark I: 
  339: \ a ./ in the beginning of filename is expanded to the directory the
  340: \ current file comes from. ./ can also be included in the search-path!
  341: \ ~+/ loads from the current working directory
  342: 
  343: \ remark II:
  344: \ if there is no sufficient space for the search path increase it!
  345: 
  346: 
  347: \ -Creating custom paths:
  348: 
  349: \ It is possible to use the search mechanism on yourself.
  350: 
  351: \ Make a buffer for the path:
  352: \ create mypath	100 chars , 	\ maximum length (is checked)
  353: \ 		0 ,		\ real len
  354: \ 		100 chars allot \ space for path
  355: \ use the same functions as above with:
  356: \ mypath path+ 
  357: \ mypath path=
  358: \ mypath .path
  359: 
  360: \ do a open with the search path:
  361: \ open-path-file ( adr len path -- fd adr len ior )
  362: \ the file is opened read-only; if the file is not found an error is generated
  363: 
  364: \ questions to: wilke@jwdt.com
  365: 
  366: [IFUNDEF] +place
  367: : +place ( adr len adr )
  368:         2dup >r >r
  369:         dup c@ char+ + swap move
  370:         r> r> dup c@ rot + swap c! ;
  371: [THEN]
  372: 
  373: [IFUNDEF] place
  374: : place ( c-addr1 u c-addr2 )
  375:         2dup c! char+ swap move ;
  376: [THEN]
  377: 
  378: \ if we have path handling, use this and the setup of it
  379: [IFUNDEF] open-fpath-file
  380: 
  381: create sourcepath 1024 chars , 0 , 1024 chars allot \ !! make this dynamic
  382: sourcepath value fpath
  383: 
  384: : also-path ( adr len path^ -- )
  385:   >r
  386:   \ len check
  387:   r@ cell+ @ over + r@ @ u> ABORT" path buffer too small!"
  388:   \ copy into
  389:   tuck r@ cell+ dup @ cell+ + swap cmove
  390:   \ make delimiter
  391:   0 r@ cell+ dup @ cell+ + 2 pick + c! 1 + r> cell+ +!
  392:   ;
  393: 
  394: : only-path ( adr len path^ -- )
  395:   dup 0 swap cell+ ! also-path ;
  396: 
  397: : path+ ( path-addr  "dir" -- ) \ gforth
  398:     \G Add the directory @var{dir} to the search path @var{path-addr}.
  399:     name rot also-path ;
  400: 
  401: : fpath+ ( "dir" ) \ gforth
  402:     \G Add directory @var{dir} to the Forth search path.
  403:     fpath path+ ;
  404: 
  405: : path= ( path-addr "dir1|dir2|dir3" ) \ gforth
  406:     \G Make a complete new search path; the path separator is |.
  407:     name 2dup bounds ?DO i c@ [char] | = IF 0 i c! THEN LOOP
  408:     rot only-path ;
  409: 
  410: : fpath= ( "dir1|dir2|dir3" ) \ gforth
  411:     \G Make a complete new Forth search path; the path separator is |.
  412:     fpath path= ;
  413: 
  414: : path>counted  cell+ dup cell+ swap @ ;
  415: 
  416: : next-path ( adr len -- adr2 len2 )
  417:   2dup 0 scan
  418:   dup 0= IF     2drop 0 -rot 0 -rot EXIT THEN
  419:   >r 1+ -rot r@ 1- -rot
  420:   r> - ;
  421: 
  422: : previous-path ( path^ -- )
  423:   dup path>counted
  424:   BEGIN tuck dup WHILE repeat ;
  425: 
  426: : .path ( path-addr -- ) \ gforth
  427:     \G Display the contents of the search path @var{path-addr}.
  428:     path>counted
  429:     BEGIN next-path dup WHILE type space REPEAT 2drop 2drop ;
  430: 
  431: : .fpath ( -- ) \ gforth
  432:     \G Display the contents of the Forth search path.
  433:     fpath .path ;
  434: 
  435: : absolut-path? ( addr u -- flag ) \ gforth
  436:     \G A path is absolute if it starts with a / or a ~ (~ expansion),
  437:     \G or if it is in the form ./*, extended regexp: ^[/~]|./, or if
  438:     \G it has a colon as second character ("C:...").  Paths simply
  439:     \G containing a / are not absolute!
  440:     2dup 2 u> swap 1+ c@ [char] : = and >r \ dos absoulte: c:/....
  441:     over c@ [char] / = >r
  442:     over c@ [char] ~ = >r
  443:     \ 2dup 3 min S" ../" compare 0= r> or >r \ not catered for in expandtopic
  444:     2 min S" ./" compare 0=
  445:     r> r> r> or or or ;
  446: 
  447: Create ofile 0 c, 255 chars allot
  448: Create tfile 0 c, 255 chars allot
  449: 
  450: : pathsep? dup [char] / = swap [char] \ = or ;
  451: 
  452: : need/   ofile dup c@ + c@ pathsep? 0= IF s" /" ofile +place THEN ;
  453: 
  454: : extractpath ( adr len -- adr len2 )
  455:   BEGIN dup WHILE 1-
  456:         2dup + c@ pathsep? IF EXIT THEN
  457:   REPEAT ;
  458: 
  459: : remove~+ ( -- )
  460:     ofile count 3 min s" ~+/" compare 0=
  461:     IF
  462: 	ofile count 3 /string ofile place
  463:     THEN ;
  464: 
  465: : expandtopic ( -- ) \ stack effect correct? - anton
  466:     \ expands "./" into an absolute name
  467:     ofile count 2 min s" ./" compare 0=
  468:     IF
  469: 	ofile count 1 /string tfile place
  470: 	0 ofile c! sourcefilename extractpath ofile place
  471: 	ofile c@ IF need/ THEN
  472: 	tfile count over c@ pathsep? IF 1 /string THEN
  473: 	ofile +place
  474:     THEN ;
  475: 
  476: : compact.. ( adr len -- adr2 len2 )
  477:     \ deletes phrases like "xy/.." out of our directory name 2dec97jaw
  478:     over swap
  479:     BEGIN  dup  WHILE
  480:         dup >r '/ scan 2dup 4 min s" /../" compare 0=
  481:         IF
  482:             dup r> - >r 4 /string over r> + 4 -
  483:             swap 2dup + >r move dup r> over -
  484:         ELSE
  485:             rdrop dup 1 min /string
  486:         THEN
  487:     REPEAT  drop over - ;
  488: 
  489: : reworkdir ( -- )
  490:   remove~+
  491:   ofile count compact..
  492:   nip ofile c! ;
  493: 
  494: : open-ofile ( -- fid ior )
  495:     \G opens the file whose name is in ofile
  496:     expandtopic reworkdir
  497:     ofile count r/o open-file ;
  498: 
  499: : check-path ( adr1 len1 adr2 len2 -- fd 0 | 0 <>0 )
  500:   0 ofile ! >r >r ofile place need/
  501:   r> r> ofile +place
  502:   open-ofile ;
  503: 
  504: : open-path-file ( addr1 u1 path-addr -- wfileid addr2 u2 0 | ior ) \ gforth
  505:     \G Look in path @var{path-addr} for the file specified by @var{addr1 u1}.
  506:     \G If found, the resulting path and an open file descriptor
  507:     \G are returned. If the file is not found, @var{ior} is non-zero.
  508:   >r
  509:   2dup absolut-path?
  510:   IF    rdrop
  511:         ofile place open-ofile
  512: 	dup 0= IF >r ofile count r> THEN EXIT
  513:   ELSE  r> path>counted
  514:         BEGIN  next-path dup
  515:         WHILE  5 pick 5 pick check-path
  516:         0= IF >r 2drop 2drop r> ofile count 0 EXIT ELSE drop THEN
  517:   REPEAT
  518:         2drop 2drop 2drop -38
  519:   THEN ;
  520: 
  521: : open-fpath-file ( addr1 u1 -- wfileid addr2 u2 0 | ior ) \ gforth
  522:     \G Look in the Forth search path for the file specified by @var{addr1 u1}.
  523:     \G If found, the resulting path and an open file descriptor
  524:     \G are returned. If the file is not found, @var{ior} is non-zero.
  525:     fpath open-path-file ;
  526: 
  527: fpath= ~+
  528: 
  529: [THEN]
  530: 
  531: \ \ --------------------	include require			13may99jaw
  532: 
  533: >CROSS
  534: 
  535: : add-included-file ( adr len -- adr )
  536:   dup >fl-name char+ allocate throw >r
  537:   file-list @ r@ ! r@ file-list !
  538:   r@ >fl-name place r> ;
  539: 
  540: : included? ( c-addr u -- f )
  541:   file-list
  542:   BEGIN	@ dup
  543:   WHILE	>r 2dup r@ >fl-name count compare 0=
  544: 	IF rdrop 2drop true EXIT THEN
  545: 	r>
  546:   REPEAT
  547:   2drop drop false ;	
  548: 
  549: false DebugFlag showincludedfiles
  550: 
  551: : included1 ( fd adr u -- )
  552: \ include file adr u / fd
  553: \ we don't use fd with include-file, because the forth system
  554: \ doesn't know the name of the file to get a nice error report
  555:   [d?] showincludedfiles
  556:   IF	cr ." Including: " 2dup type ." ..." THEN
  557:   rot close-file throw
  558:   source-desc >r
  559:   add-included-file to source-desc 
  560:   sourcefilename
  561:   ['] included catch
  562:   r> to source-desc 
  563:   throw ;
  564: 
  565: : included ( adr len -- )
  566: 	cross-file-list to file-list
  567: 	open-fpath-file throw 
  568:         included1 ;
  569: 
  570: : required ( adr len -- )
  571: 	cross-file-list to file-list
  572: 	open-fpath-file throw \ 2dup cr ." R:" type
  573: 	2dup included?
  574: 	IF 	2drop close-file throw
  575: 	ELSE	included1
  576: 	THEN ;
  577: 
  578: : include bl word count included ;
  579: 
  580: : require bl word count required ;
  581: 
  582: 0 [IF]
  583: 
  584: also forth definitions previous
  585: 
  586: : included ( adr len -- ) included ;
  587: 
  588: : required ( adr len -- ) required ;
  589: 
  590: : include include ;
  591: 
  592: : require require ;
  593: 
  594: [THEN]
  595: 
  596: >CROSS
  597: hex
  598: 
  599: \ \ --------------------        Error Handling                  05aug97jaw
  600: 
  601: \ Flags
  602: 
  603: also forth definitions  \ these values may be predefined before
  604:                         \ the cross-compiler is loaded
  605: 
  606: false DefaultValue stack-warn   	 \ check on empty stack at any definition
  607: false DefaultValue create-forward-warn   \ warn on forward declaration of created words
  608: 
  609: previous >CROSS
  610: 
  611: : .dec
  612:   base @ decimal swap . base ! ;
  613: 
  614: : .sourcepos
  615:   cr sourcefilename type ." :"
  616:   sourceline# .dec ;
  617: 
  618: : warnhead
  619: \G display error-message head
  620: \G perhaps with linenumber and filename
  621:   .sourcepos ." Warning: " ;
  622: 
  623: : empty? depth IF .sourcepos ." Stack not empty!"  THEN ;
  624: 
  625: stack-warn [IF]
  626: : defempty? empty? ;
  627: [ELSE]
  628: : defempty? ; immediate
  629: [THEN]
  630: 
  631: \ \ GhostNames Ghosts                                  9may93jaw
  632: 
  633: \ second name source to search trough list
  634: 
  635: VARIABLE GhostNames
  636: 0 GhostNames !
  637: 
  638: : GhostName ( -- addr )
  639:     align here GhostNames @ , GhostNames ! here 0 ,
  640:     bl word count
  641:     \ 2dup type space
  642:     string, \ !! cfalign ?
  643:     align ;
  644: 
  645: \ Ghost Builder                                        06oct92py
  646: 
  647: \ <T T> new version with temp variable                 10may93jaw
  648: 
  649: VARIABLE VocTemp
  650: 
  651: : <T  get-current VocTemp ! also Ghosts definitions ;
  652: : T>  previous VocTemp @ set-current ;
  653: 
  654: hex
  655: 4711 Constant <fwd>             4712 Constant <res>
  656: 4713 Constant <imm>             4714 Constant <do:>
  657: 4715 Constant <skip>
  658: 
  659: \ iForth makes only immediate directly after create
  660: \ make atonce trick! ?
  661: 
  662: Variable atonce atonce off
  663: 
  664: : NoExec true ABORT" CROSS: Don't execute ghost, or immediate target word" ;
  665: 
  666: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  667: 
  668: : >magic ;		\ type of ghost
  669: : >link cell+ ;		\ pointer where ghost is in target, or if unresolved
  670: 			\ points to the where we have to resolve (linked-list)
  671: : >exec cell+ cell+ ;	\ execution symantics (while target compiling) of ghost
  672: : >end 3 cells + ;	\ room for additional tags
  673: 			\ for builder (create, variable...) words the
  674: 			\ execution symantics of words built are placed here
  675: 
  676: Variable executed-ghost \ last executed ghost, needed in tcreate and gdoes>
  677: Variable last-ghost	\ last ghost that is created
  678: Variable last-header-ghost \ last ghost definitions with header
  679: 
  680: : Make-Ghost ( "name" -- ghost )
  681:   >in @ GhostName swap >in !
  682:   <T Create atonce @ IF immediate atonce off THEN
  683:   here tuck swap ! ghostheader T>
  684:   dup last-ghost !
  685:   DOES> dup executed-ghost ! >exec @ execute ;
  686: 
  687: \ ghost words                                          14oct92py
  688: \                                          changed:    10may93py/jaw
  689: 
  690: : gfind   ( string -- ghost true/1 / string false )
  691: \ searches for string in word-list ghosts
  692:   dup count [ ' ghosts >wordlist ] Literal search-wordlist
  693:   dup IF >r >body nip r>  THEN ;
  694: 
  695: : gdiscover ( xt -- ghost true | xt false )
  696:   GhostNames
  697:   BEGIN @ dup
  698:   WHILE 2dup
  699:         cell+ @ dup >magic @ <fwd> <>
  700:         >r >link @ = r> and
  701:         IF cell+ @ nip true EXIT THEN
  702:   REPEAT
  703:   drop false ;
  704: 
  705: VARIABLE Already
  706: 
  707: : ghost   ( "name" -- ghost )
  708:   Already off
  709:   >in @  bl word gfind   IF  atonce off Already on nip EXIT  THEN
  710:   drop  >in !  Make-Ghost ;
  711: 
  712: : >ghostname ( ghost -- adr len )
  713:   GhostNames
  714:   BEGIN @ dup
  715:   WHILE 2dup cell+ @ =
  716:   UNTIL nip 2 cells + count
  717:   ELSE  2drop 
  718: 	\ true abort" CROSS: Ghostnames inconsistent"
  719: 	s" ?!?!?!"
  720:   THEN ;
  721: 
  722: : .ghost ( ghost -- ) >ghostname type ;
  723: 
  724: \ ' >ghostname ALIAS @name
  725: 
  726: : forward? ( ghost -- flag )
  727:   >magic @ <fwd> = ;
  728: 
  729: : undefined? ( ghost -- flag )
  730:   >magic @ dup <fwd> = swap <skip> = or ;
  731: 
  732: \ Predefined ghosts                                    12dec92py
  733: 
  734: ghost 0=                                        drop
  735: ghost branch    ghost ?branch                   2drop
  736: ghost (do)      ghost (?do)                     2drop
  737: ghost (for)                                     drop
  738: ghost (loop)    ghost (+loop)                   2drop
  739: ghost (next)                                    drop
  740: ghost unloop    ghost ;S                        2drop
  741: ghost lit       ghost (compile) ghost !         2drop drop
  742: ghost (does>)   ghost noop                      2drop
  743: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  744: ghost '                                         drop
  745: ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
  746: ghost :dovar					drop
  747: ghost over      ghost =         ghost drop      2drop drop
  748: ghost - drop
  749: ghost 2drop drop
  750: ghost 2dup drop
  751: 
  752: \ \ Parameter for target systems                         06oct92py
  753: 
  754: \ we define it ans like...
  755: wordlist Constant target-environment
  756: 
  757: VARIABLE env-current \ save information of current dictionary to restore with environ>
  758: 
  759: : >ENVIRON get-current env-current ! target-environment set-current ;
  760: : ENVIRON> env-current @ set-current ; 
  761: 
  762: >TARGET
  763: 
  764: : environment? ( adr len -- [ x ] true | false )
  765:   target-environment search-wordlist 
  766:   IF execute true ELSE false THEN ;
  767: 
  768: : e? bl word count T environment? H 0= ABORT" environment variable not defined!" ;
  769: 
  770: : has? 	bl word count T environment? H 
  771: 	IF 	\ environment variable is present, return its value
  772: 	ELSE	\ environment variable is not present, return false
  773: 		false \ debug true ABORT" arg" 
  774: 	THEN ;
  775: 
  776: : $has? T environment? H IF ELSE false THEN ;
  777: 
  778: >ENVIRON get-order get-current swap 1+ set-order
  779: true SetValue compiler
  780: true SetValue cross
  781: true SetValue standard-threading
  782: >TARGET previous
  783: 
  784: 0
  785: [IFDEF] mach-file mach-file count 1 [THEN]
  786: [IFDEF] machine-file machine-file 1 [THEN]
  787: [IF] 	included hex drop
  788: [ELSE]  cr ." No machine description!" ABORT 
  789: [THEN]
  790: 
  791: >ENVIRON
  792: 
  793: T has? ec H
  794: [IF]
  795: false DefaultValue relocate
  796: false DefaultValue file
  797: false DefaultValue OS
  798: false DefaultValue prims
  799: false DefaultValue floating
  800: false DefaultValue glocals
  801: false DefaultValue dcomps
  802: false DefaultValue hash
  803: false DefaultValue xconds
  804: false DefaultValue header
  805: false DefaultValue new-input
  806: [THEN]
  807: 
  808: true DefaultValue interpreter
  809: true DefaultValue ITC
  810: false DefaultValue rom
  811: true DefaultValue standardthreading
  812: 
  813: >TARGET
  814: s" relocate" T environment? H 
  815: [IF]	SetValue NIL
  816: [ELSE]	>ENVIRON T NIL H SetValue relocate
  817: [THEN]
  818: 
  819: >CROSS
  820: 
  821: \ \ Create additional parameters                         19jan95py
  822: 
  823: \ currently cross only works for host machines with address-unit-bits
  824: \ eual to 8 because of s! and sc!
  825: \ but I start to query the environment just to modularize a little bit
  826: 
  827: : check-address-unit-bits ( -- )	
  828: \	s" ADDRESS-UNIT-BITS" environment?
  829: \	IF 8 <> ELSE true THEN
  830: \	ABORT" ADDRESS-UNIT-BITS unknown or not equal to 8!"
  831: 
  832: \	shit, this doesn't work because environment? is only defined for 
  833: \	gforth.fi and not kernl???.fi
  834: 	;
  835: 
  836: check-address-unit-bits
  837: 8 Constant bits/byte	\ we define: byte is address-unit
  838: 
  839: 1 bits/byte lshift Constant maxbyte 
  840: \ this sets byte size for the target machine, (probably right guess) jaw
  841: 
  842: T
  843: NIL		   	Constant TNIL
  844: cell               	Constant tcell
  845: cell<<             	Constant tcell<<
  846: cell>bit           	Constant tcell>bit
  847: bits/char          	Constant tbits/char
  848: bits/char H bits/byte T /      
  849: 			Constant tchar
  850: float             	Constant tfloat
  851: 1 bits/char lshift 	Constant tmaxchar
  852: [IFUNDEF] bits/byte
  853: 8			Constant tbits/byte
  854: [ELSE]
  855: bits/byte		Constant tbits/byte
  856: [THEN]
  857: H
  858: tbits/char bits/byte /	Constant tbyte
  859: 
  860: 
  861: \ Variables                                            06oct92py
  862: 
  863: Variable image
  864: Variable tlast    TNIL tlast !  \ Last name field
  865: Variable tlastcfa \ Last code field
  866: Variable tdoes    \ Resolve does> calls
  867: Variable bit$
  868: 
  869: \ statistics						10jun97jaw
  870: 
  871: Variable headers-named 0 headers-named !
  872: Variable user-vars 0 user-vars !
  873: 
  874: : target>bitmask-size ( u1 -- u2 )
  875:   1- tcell>bit rshift 1+ ;
  876: 
  877: : allocatetarget ( size --- adr )
  878:   dup allocate ABORT" CROSS: No memory for target"
  879:   swap over swap erase ;
  880: 
  881: \ \ memregion.fs
  882: 
  883: 
  884: Variable last-defined-region    \ pointer to last defined region
  885: Variable region-link            \ linked list with all regions
  886: Variable mirrored-link          \ linked list for mirrored regions
  887: 0 dup mirrored-link ! region-link !
  888: 
  889: 
  890: : >rname 6 cells + ;
  891: : >rbm   5 cells + ;
  892: : >rmem  4 cells + ;
  893: : >rlink 3 cells + ;
  894: : >rdp 2 cells + ;
  895: : >rlen cell+ ;
  896: : >rstart ;
  897: 
  898: 
  899: : region ( addr len -- )                \G create a new region
  900:   \ check whether predefined region exists 
  901:   save-input bl word find >r >r restore-input throw r> r> 0= 
  902:   IF	\ make region
  903: 	drop
  904: 	save-input create restore-input throw
  905: 	here last-defined-region !
  906: 	over ( startaddr ) , ( length ) , ( dp ) ,
  907: 	region-link linked 0 , 0 , bl word count string,
  908:   ELSE	\ store new parameters in region
  909:         bl word drop
  910: 	>body >r r@ last-defined-region !
  911: 	r@ >rlen ! dup r@ >rstart ! r> >rdp !
  912:   THEN ;
  913: 
  914: : borders ( region -- startaddr endaddr ) \G returns lower and upper region border
  915:   dup >rstart @ swap >rlen @ over + ;
  916: 
  917: : extent  ( region -- startaddr len )   \G returns the really used area
  918:   dup >rstart @ swap >rdp @ over - ;
  919: 
  920: : area ( region -- startaddr totallen ) \G returns the total area
  921:   dup >rstart @ swap >rlen @ ;
  922: 
  923: : mirrored                              \G mark a region as mirrored
  924:   mirrored-link
  925:   align linked last-defined-region @ , ;
  926: 
  927: : .addr ( u -- )
  928: \G prints a 16 or 32 Bit nice hex value
  929:   base @ >r hex
  930:   tcell 2 u>
  931:   IF s>d <# # # # # [char] . hold # # # # #> type
  932:   ELSE s>d <# # # # # # #> type
  933:   THEN r> base ! ;
  934: 
  935: : .regions                      \G display region statistic
  936: 
  937:   \ we want to list the regions in the right order
  938:   \ so first collect all regions on stack
  939:   0 region-link @
  940:   BEGIN dup WHILE dup @ REPEAT drop
  941:   BEGIN dup
  942:   WHILE cr
  943:         0 >rlink - >r
  944:         r@ >rname count tuck type
  945:         12 swap - 0 max spaces space
  946:         ." Start: " r@ >rstart @ dup .addr space
  947:         ." End: " r@ >rlen @ + .addr space
  948:         ." DP: " r> >rdp @ .addr
  949:   REPEAT drop
  950:   s" rom" T $has? H 0= ?EXIT
  951:   cr ." Mirrored:"
  952:   mirrored-link @
  953:   BEGIN dup
  954:   WHILE space dup cell+ @ >rname count type @
  955:   REPEAT drop cr
  956:   ;
  957: 
  958: \ -------- predefined regions
  959: 
  960: 0 0 region address-space
  961: \ total memory addressed and used by the target system
  962: 
  963: 0 0 region dictionary
  964: \ rom area for the compiler
  965: 
  966: T has? rom H
  967: [IF]
  968: 0 0 region ram-dictionary mirrored
  969: \ ram area for the compiler
  970: [ELSE]
  971: ' dictionary ALIAS ram-dictionary
  972: [THEN]
  973: 
  974: 0 0 region return-stack
  975: 
  976: 0 0 region data-stack
  977: 
  978: 0 0 region tib-region
  979: 
  980: ' dictionary ALIAS rom-dictionary
  981: 
  982: 
  983: : setup-target ( -- )   \G initialize targets memory space
  984:   s" rom" T $has? H
  985:   IF  \ check for ram and rom...
  986:       \ address-space area nip 0<>
  987:       ram-dictionary area nip 0<>
  988:       rom-dictionary area nip 0<>
  989:       and 0=
  990:       ABORT" CROSS: define address-space, rom- , ram-dictionary, with rom-support!"
  991:   THEN
  992:   address-space area nip
  993:   IF
  994:       address-space area
  995:   ELSE
  996:       dictionary area
  997:   THEN
  998:   nip 0=
  999:   ABORT" CROSS: define at least address-space or dictionary!!"
 1000: 
 1001:   \ allocate target for each region
 1002:   region-link
 1003:   BEGIN @ dup
 1004:   WHILE dup
 1005:         0 >rlink - >r
 1006:         r@ >rlen @
 1007:         IF      \ allocate mem
 1008:                 r@ >rlen @ dup
 1009: 
 1010:                 allocatetarget dup image !
 1011:                 r@ >rmem !
 1012: 
 1013:                 target>bitmask-size allocatetarget
 1014:                 dup bit$ !
 1015:                 r> >rbm !
 1016: 
 1017:         ELSE    r> drop THEN
 1018:    REPEAT drop ;
 1019: 
 1020: \ MakeKernal                                           		22feb99jaw
 1021: 
 1022: : makekernel ( targetsize -- targetsize )
 1023:   dup dictionary >rlen ! setup-target ;
 1024: 
 1025: >MINIMAL
 1026: : makekernel makekernel ;
 1027: >CROSS
 1028: 
 1029: \ \ switched tdp for rom support				03jun97jaw
 1030: 
 1031: \ second value is here to store some maximal value for statistics
 1032: \ tempdp is also embedded here but has nothing to do with rom support
 1033: \ (needs switched dp)
 1034: 
 1035: variable tempdp	0 ,	\ temporary dp for resolving
 1036: variable tempdp-save
 1037: 
 1038: 0 [IF]
 1039: variable romdp 0 ,      \ Dictionary-Pointer for ramarea
 1040: variable ramdp 0 ,      \ Dictionary-Pointer for romarea
 1041: 
 1042: \
 1043: variable sramdp		\ start of ram-area for forth
 1044: variable sromdp		\ start of rom-area for forth
 1045: 
 1046: [THEN]
 1047: 
 1048: 
 1049: 0 value tdp
 1050: variable fixed		\ flag: true: no automatic switching
 1051: 			\	false: switching is done automatically
 1052: 
 1053: \ Switch-Policy:
 1054: \
 1055: \ a header is always compiled into rom
 1056: \ after a created word (create and variable) compilation goes to ram
 1057: \
 1058: \ Be careful: If you want to make the data behind create into rom
 1059: \ you have to put >rom before create!
 1060: 
 1061: variable constflag constflag off
 1062: 
 1063: : activate ( region -- )
 1064: \G next code goes to this region
 1065:   >rdp to tdp ;
 1066: 
 1067: : (switchram)
 1068:   fixed @ ?EXIT s" rom" T $has? H 0= ?EXIT
 1069:   ram-dictionary activate ;
 1070: 
 1071: : switchram
 1072:   constflag @
 1073:   IF constflag off ELSE (switchram) THEN ;
 1074: 
 1075: : switchrom
 1076:   fixed @ ?EXIT rom-dictionary activate ;
 1077: 
 1078: : >tempdp ( addr -- ) 
 1079:   tdp tempdp-save ! tempdp to tdp tdp ! ;
 1080: : tempdp> ( -- )
 1081:   tempdp-save @ to tdp ;
 1082: 
 1083: : >ram  fixed off (switchram) fixed on ;
 1084: : >rom  fixed off switchrom fixed on ;
 1085: : >auto fixed off switchrom ;
 1086: 
 1087: 
 1088: 
 1089: \ : romstart dup sromdp ! romdp ! ;
 1090: \ : ramstart dup sramdp ! ramdp ! ;
 1091: 
 1092: \ default compilation goes to rom
 1093: \ when romable support is off, only the rom switch is used (!!)
 1094: >auto
 1095: 
 1096: : there  tdp @ ;
 1097: 
 1098: >TARGET
 1099: 
 1100: \ \ Target Memory Handling
 1101: 
 1102: \ Byte ordering and cell size                          06oct92py
 1103: 
 1104: : cell+         tcell + ;
 1105: : cells         tcell<< lshift ;
 1106: : chars         tchar * ;
 1107: : char+		tchar + ;
 1108: : floats	tfloat * ;
 1109:     
 1110: >CROSS
 1111: : cell/         tcell<< rshift ;
 1112: >TARGET
 1113: 20 CONSTANT bl
 1114: \ TNIL Constant NIL
 1115: 
 1116: >CROSS
 1117: 
 1118: bigendian
 1119: [IF]
 1120:    : S!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
 1121:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
 1122:    : S@  ( addr -- n )  >r 0 0 r> tcell bounds
 1123:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
 1124:    : Sc!  ( n addr -- )  >r s>d r> tchar bounds swap 1-
 1125:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
 1126:    : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds
 1127:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
 1128: [ELSE]
 1129:    : S!  ( n addr -- )  >r s>d r> tcell bounds
 1130:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
 1131:    : S@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
 1132:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
 1133:    : Sc!  ( n addr -- )  >r s>d r> tchar bounds
 1134:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
 1135:    : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds swap 1-
 1136:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
 1137: [THEN]
 1138: 
 1139: : taddr>region ( taddr -- region | 0 )
 1140: \G finds for a target-address the correct region
 1141: \G returns 0 if taddr is not in range of a target memory region
 1142:   region-link
 1143:   BEGIN @ dup
 1144:   WHILE dup >r
 1145:         0 >rlink - >r
 1146:         r@ >rlen @
 1147:         IF      dup r@ borders within
 1148:                 IF r> r> drop nip EXIT THEN
 1149:         THEN
 1150:         r> drop
 1151:         r>
 1152:   REPEAT
 1153:   2drop 0 ;
 1154: 
 1155: : (>regionimage) ( taddr -- 'taddr )
 1156:   dup
 1157:   \ find region we want to address
 1158:   taddr>region dup 0= ABORT" Address out of range!"
 1159:   >r
 1160:   \ calculate offset in region
 1161:   r@ >rstart @ -
 1162:   \ add regions real address in our memory
 1163:   r> >rmem @ + ;
 1164: 
 1165: \ Bit string manipulation                               06oct92py
 1166: \                                                       9may93jaw
 1167: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
 1168: : bits ( n -- n ) chars Bittable + c@ ;
 1169: 
 1170: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
 1171: : +bit ( addr n -- )  >bit over c@ or swap c! ;
 1172: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
 1173: 
 1174: : (relon) ( taddr -- )  
 1175:   [ [IFDEF] fd-relocation-table ]
 1176:   s" +" fd-relocation-table write-file throw
 1177:   dup s>d <# #s #> fd-relocation-table write-line throw
 1178:   [ [THEN] ]
 1179:   bit$ @ swap cell/ +bit ;
 1180: 
 1181: : (reloff) ( taddr -- ) 
 1182:   [ [IFDEF] fd-relocation-table ]
 1183:   s" -" fd-relocation-table write-file throw
 1184:   dup s>d <# #s #> fd-relocation-table write-line throw
 1185:   [ [THEN] ]
 1186:   bit$ @ swap cell/ -bit ;
 1187: 
 1188: : (>image) ( taddr -- absaddr ) image @ + ;
 1189: 
 1190: DEFER >image
 1191: DEFER relon
 1192: DEFER reloff
 1193: DEFER correcter
 1194: 
 1195: T has? relocate H
 1196: [IF]
 1197: ' (relon) IS relon
 1198: ' (reloff) IS reloff
 1199: ' (>image) IS >image
 1200: [ELSE]
 1201: ' drop IS relon
 1202: ' drop IS reloff
 1203: ' (>regionimage) IS >image
 1204: [THEN]
 1205: 
 1206: \ Target memory access                                 06oct92py
 1207: 
 1208: : align+  ( taddr -- rest )
 1209:     tcell tuck 1- and - [ tcell 1- ] Literal and ;
 1210: : cfalign+  ( taddr -- rest )
 1211:     \ see kernel.fs:cfaligned
 1212:     /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;
 1213: 
 1214: >TARGET
 1215: : aligned ( taddr -- ta-addr )  dup align+ + ;
 1216: \ assumes cell alignment granularity (as GNU C)
 1217: 
 1218: : cfaligned ( taddr1 -- taddr2 )
 1219:     \ see kernel.fs
 1220:     dup cfalign+ + ;
 1221: 
 1222: : @  ( taddr -- w )     >image S@ ;
 1223: : !  ( w taddr -- )     >image S! ;
 1224: : c@ ( taddr -- char )  >image Sc@ ;
 1225: : c! ( char taddr -- )  >image Sc! ;
 1226: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
 1227: : 2! ( x1 x2 taddr -- ) T tuck ! cell+ ! H ;
 1228: 
 1229: \ Target compilation primitives                        06oct92py
 1230: \ included A!                                          16may93jaw
 1231: 
 1232: : here  ( -- there )    there ;
 1233: : allot ( n -- )        tdp +! ;
 1234: : ,     ( w -- )        T here H tcell T allot  ! H ;
 1235: : c,    ( char -- )     T here H tchar T allot c! H ;
 1236: : align ( -- )          T here H align+ 0 ?DO  bl T c, H tchar +LOOP ;
 1237: : cfalign ( -- )
 1238:     T here H cfalign+ 0 ?DO  bl T c, H tchar +LOOP ;
 1239: 
 1240: : >address		dup 0>= IF tbyte / THEN ; \ ?? jaw 
 1241: : A!                    swap >address swap dup relon T ! H ;
 1242: : A,    ( w -- )        >address T here H relon T , H ;
 1243: 
 1244: >CROSS
 1245: 
 1246: : tcmove ( source dest len -- )
 1247: \G cmove in target memory
 1248:   tchar * bounds
 1249:   ?DO  dup T c@ H I T c! H 1+
 1250:   tchar +LOOP  drop ;
 1251: 
 1252: \ \ Load Assembler
 1253: 
 1254: >TARGET
 1255: H also Forth definitions
 1256: 
 1257: : X 	bl word count [ ' target >wordlist ] Literal search-wordlist
 1258: 	IF	state @ IF compile,
 1259: 		ELSE execute THEN
 1260: 	ELSE	-1 ABORT" Cross: access method not supported!"
 1261: 	THEN ; immediate
 1262: 
 1263: [IFDEF] asm-include asm-include [THEN] hex
 1264: 
 1265: previous
 1266: >CROSS H
 1267: 
 1268: \ \ --------------------        Compiler Plug Ins               01aug97jaw
 1269: 
 1270: \  Compiler States
 1271: 
 1272: Variable comp-state
 1273: 0 Constant interpreting
 1274: 1 Constant compiling
 1275: 2 Constant resolving
 1276: 3 Constant assembling
 1277: 
 1278: Defer lit, ( n -- )
 1279: Defer alit, ( n -- )
 1280: 
 1281: Defer branch, ( target-addr -- )	\ compiles a branch
 1282: Defer ?branch, ( target-addr -- )	\ compiles a ?branch
 1283: Defer branchmark, ( -- branch-addr )	\ reserves room for a branch
 1284: Defer ?branchmark, ( -- branch-addr )	\ reserves room for a ?branch
 1285: Defer ?domark, ( -- branch-addr )	\ reserves room for a ?do branch
 1286: Defer branchto, ( -- )			\ actual program position is target of a branch (do e.g. alignment)
 1287: Defer branchtoresolve, ( branch-addr -- ) \ resolves a forward reference from branchmark
 1288: Defer branchfrom, ( -- )		\ ?!
 1289: Defer branchtomark, ( -- target-addr )	\ marks a branch destination
 1290: 
 1291: Defer colon, ( tcfa -- )		\ compiles call to tcfa at current position
 1292: Defer colonmark, ( -- addr )		\ marks a colon call
 1293: Defer colon-resolve ( tcfa addr -- )
 1294: 
 1295: Defer addr-resolve ( target-addr addr -- )
 1296: Defer doer-resolve ( ghost res-pnt target-addr addr -- ghost res-pnt )
 1297: 
 1298: Defer do,	( -- do-token )
 1299: Defer ?do,	( -- ?do-token )
 1300: Defer for,	( -- for-token )
 1301: Defer loop,	( do-token / ?do-token -- )
 1302: Defer +loop,	( do-token / ?do-token -- )
 1303: Defer next,	( for-token )
 1304: 
 1305: [IFUNDEF] ca>native
 1306: defer ca>native	
 1307: [THEN]
 1308: 
 1309: >TARGET
 1310: DEFER >body             \ we need the system >body
 1311: 			\ and the target >body
 1312: >CROSS
 1313: T 2 cells H VALUE xt>body
 1314: DEFER doprim,	\ compiles start of a primitive
 1315: DEFER docol,   	\ compiles start of a colon definition
 1316: DEFER doer,		
 1317: DEFER fini,      \ compiles end of definition ;s
 1318: DEFER doeshandler,
 1319: DEFER dodoes,
 1320: 
 1321: DEFER ]comp     \ starts compilation
 1322: DEFER comp[     \ ends compilation
 1323: 
 1324: : (cc) T a, H ;					' (cc) IS colon,
 1325: 
 1326: : (cr) >tempdp ]comp colon, comp[ tempdp> ; 	' (cr) IS colon-resolve
 1327: : (ar) T ! H ;					' (ar) IS addr-resolve
 1328: : (dr)  ( ghost res-pnt target-addr addr )
 1329: 	>tempdp drop over 
 1330: 	dup >magic @ <do:> =
 1331: 	IF 	doer,
 1332: 	ELSE	dodoes,
 1333: 	THEN 
 1334: 	tempdp> ;				' (dr) IS doer-resolve
 1335: 
 1336: : (cm) ( -- addr )
 1337:     T here align H
 1338:     -1 colon, ;					' (cm) IS colonmark,
 1339: 
 1340: >TARGET
 1341: : compile, colon, ;
 1342: >CROSS
 1343: 
 1344: \ resolve structure
 1345: 
 1346: : >next ;		\ link to next field
 1347: : >tag cell+ ;		\ indecates type of reference: 0: call, 1: address, 2: doer
 1348: : >taddr cell+ cell+ ;	
 1349: : >ghost 3 cells + ;
 1350: : >file 4 cells + ;
 1351: : >line 5 cells + ;
 1352: 
 1353: : (refered) ( ghost addr tag -- )
 1354: \G creates a reference to ghost at address taddr
 1355:     rot >r here r@ >link @ , r> >link ! 
 1356:     ( taddr tag ) ,
 1357:     ( taddr ) , 
 1358:     last-header-ghost @ , 
 1359:     loadfile , 
 1360:     sourceline# , 
 1361:   ;
 1362: 
 1363: : refered ( ghost tag -- )
 1364: \G creates a resolve structure
 1365:     T here aligned H swap (refered)
 1366:   ;
 1367: 
 1368: : killref ( addr ghost -- )
 1369: \G kills a forward reference to ghost at position addr
 1370: \G this is used to eleminate a :dovar refence after making a DOES>
 1371:     dup >magic @ <fwd> <> IF 2drop EXIT THEN
 1372:     swap >r >link
 1373:     BEGIN dup @ dup  ( addr last this )
 1374:     WHILE dup >taddr @ r@ =
 1375:  	 IF   @ over !
 1376: 	 ELSE nip THEN
 1377:     REPEAT rdrop 2drop 
 1378:   ;
 1379: 
 1380: Defer resolve-warning
 1381: 
 1382: : reswarn-test ( ghost res-struct -- ghost res-struct )
 1383:   over cr ." Resolving " .ghost dup ."  in " >ghost @ .ghost ;
 1384: 
 1385: : reswarn-forward ( ghost res-struct -- ghost res-struct )
 1386:   over warnhead .ghost dup ."  is referenced in " 
 1387:   >ghost @ .ghost ;
 1388: 
 1389: \ ' reswarn-test IS resolve-warning
 1390:  
 1391: \ resolve                                              14oct92py
 1392: 
 1393:  : resolve-loop ( ghost resolve-list tcfa -- )
 1394:     >r
 1395:     BEGIN dup WHILE 
 1396: \  	  dup >tag @ 2 = IF reswarn-forward THEN
 1397: 	  resolve-warning 
 1398: 	  r@ over >taddr @ 
 1399: 	  2 pick >tag @
 1400: 	  CASE	0 OF colon-resolve ENDOF
 1401: 		1 OF addr-resolve ENDOF
 1402: 		2 OF doer-resolve ENDOF
 1403: 	  ENDCASE
 1404: 	  @ \ next list element
 1405:     REPEAT 2drop rdrop 
 1406:   ;
 1407: 
 1408: \ : resolve-loop ( ghost tcfa -- ghost tcfa )
 1409: \  >r dup >link @
 1410: \  BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
 1411: 
 1412: \ exists                                                9may93jaw
 1413: 
 1414: Variable TWarnings
 1415: TWarnings on
 1416: Variable Exists-Warnings
 1417: Exists-Warnings on
 1418: 
 1419: : exists ( ghost tcfa -- )
 1420:   over GhostNames
 1421:   BEGIN @ dup
 1422:   WHILE 2dup cell+ @ =
 1423:   UNTIL
 1424:         2 cells + count
 1425:         TWarnings @ Exists-Warnings @ and
 1426:         IF warnhead type ."  exists"
 1427:         ELSE 2drop THEN
 1428:         drop swap >link !
 1429:   ELSE  true abort" CROSS: Ghostnames inconsistent "
 1430:   THEN ;
 1431: 
 1432: : resolve  ( ghost tcfa -- )
 1433: \G resolve referencies to ghost with tcfa
 1434:     \ is ghost resolved?, second resolve means another definition with the
 1435:     \ same name
 1436:     over undefined? 0= IF  exists EXIT THEN
 1437:     \ get linked-list
 1438:     swap >r r@ >link @ swap \ ( list tcfa R: ghost )
 1439:     \ mark ghost as resolved
 1440:     dup r@ >link ! <res> r@ >magic !
 1441:     \ loop through forward referencies
 1442:     r> -rot 
 1443:     comp-state @ >r Resolving comp-state !
 1444:     resolve-loop 
 1445:     r> comp-state !
 1446: 
 1447:     ['] noop IS resolve-warning 
 1448:   ;
 1449: 
 1450: \ gexecute ghost,                                      01nov92py
 1451: 
 1452: : is-forward   ( ghost -- )
 1453:   colonmark, 0 (refered) ; \ compile space for call
 1454: 
 1455: : is-resolved   ( ghost -- )
 1456:   >link @ colon, ; \ compile-call
 1457: 
 1458: : gexecute   ( ghost -- )
 1459:   dup @ <fwd> = IF  is-forward  ELSE  is-resolved  THEN ;
 1460: 
 1461: : addr,  ( ghost -- )
 1462:   dup @ <fwd> = IF  1 refered 0 T a, H ELSE >link @ T a, H THEN ;
 1463: 
 1464: \ !! : ghost,     ghost  gexecute ;
 1465: 
 1466: \ .unresolved                                          11may93jaw
 1467: 
 1468: variable ResolveFlag
 1469: 
 1470: \ ?touched                                             11may93jaw
 1471: 
 1472: : ?touched ( ghost -- flag ) dup forward? swap >link @
 1473:                                0 <> and ;
 1474: 
 1475: : .forwarddefs ( ghost -- )
 1476: 	."  appeared in:"
 1477: 	>link
 1478: 	BEGIN	@ dup
 1479: 	WHILE	cr 5 spaces
 1480: 		dup >ghost @ .ghost
 1481: 		."  file " dup >file @ ?dup IF count type ELSE ." CON" THEN
 1482: 		."  line " dup >line @ .dec
 1483: 	REPEAT 
 1484: 	drop ;
 1485: 
 1486: : ?resolved  ( ghostname -- )
 1487:   dup cell+ @ ?touched
 1488:   IF  	dup 
 1489: 	cell+ cell+ count cr type ResolveFlag on 
 1490: 	cell+ @ .forwarddefs
 1491:   ELSE 	drop 
 1492:   THEN ;
 1493: 
 1494: : .unresolved  ( -- )
 1495:   ResolveFlag off cr ." Unresolved: "
 1496:   Ghostnames
 1497:   BEGIN @ dup
 1498:   WHILE dup ?resolved
 1499:   REPEAT drop ResolveFlag @
 1500:   IF
 1501:       -1 abort" Unresolved words!"
 1502:   ELSE
 1503:       ." Nothing!"
 1504:   THEN
 1505:   cr ;
 1506: 
 1507: : .stats
 1508:   base @ >r decimal
 1509:   cr ." named Headers: " headers-named @ . 
 1510:   r> base ! ;
 1511: 
 1512: >MINIMAL
 1513: 
 1514: : .unresolved .unresolved ;
 1515: 
 1516: >CROSS
 1517: \ Header states                                        12dec92py
 1518: 
 1519: bigendian [IF] 0 [ELSE] tcell 1- [THEN] Constant flag+
 1520: : flag! ( w -- )   tlast @ flag+ + dup >r T c@ xor r> c! H ;
 1521: 
 1522: VARIABLE ^imm
 1523: 
 1524: \ !! should be target wordsize specific
 1525: $80 constant alias-mask
 1526: $40 constant immediate-mask
 1527: $20 constant restrict-mask
 1528: 
 1529: >TARGET
 1530: : immediate     immediate-mask flag!
 1531:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
 1532:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
 1533:                 <imm> ^imm @ ! ;
 1534: : restrict      restrict-mask flag! ;
 1535: 
 1536: : isdoer	
 1537: \G define a forth word as doer, this makes obviously only sence on
 1538: \G forth processors such as the PSC1000
 1539: 		<do:> last-header-ghost @ >magic ! ;
 1540: >CROSS
 1541: 
 1542: \ Target Header Creation                               01nov92py
 1543: 
 1544: >TARGET
 1545: : string,  ( addr count -- )
 1546:     dup T c, H bounds  ?DO  I c@ T c, H  LOOP ;
 1547: : lstring, ( addr count -- )
 1548:     dup T , H bounds  ?DO  I c@ T c, H  LOOP ;
 1549: : name,  ( "name" -- )  bl word count T lstring, cfalign H ;
 1550: : view,   ( -- ) ( dummy ) ;
 1551: >CROSS
 1552: 
 1553: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
 1554: 
 1555: s" ./doc/crossdoc.fd" r/w create-file throw value doc-file-id
 1556: \ contains the file-id of the documentation file
 1557: 
 1558: : T-\G ( -- )
 1559:     source >in @ /string doc-file-id write-line throw
 1560:     postpone \ ;
 1561: 
 1562: Variable to-doc  to-doc on
 1563: 
 1564: : cross-doc-entry  ( -- )
 1565:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
 1566:     IF
 1567: 	s" " doc-file-id write-line throw
 1568: 	s" make-doc " doc-file-id write-file throw
 1569: 
 1570: 	tlast @ >image count 1F and doc-file-id write-file throw
 1571: 	>in @
 1572: 	[char] ( parse 2drop
 1573: 	[char] ) parse doc-file-id write-file throw
 1574: 	s"  )" doc-file-id write-file throw
 1575: 	[char] \ parse 2drop					
 1576: 	T-\G
 1577: 	>in !
 1578:     THEN ;
 1579: 
 1580: \ Target TAGS creation
 1581: 
 1582: s" kernel.TAGS" r/w create-file throw value tag-file-id
 1583: \ contains the file-id of the tags file
 1584: 
 1585: Create tag-beg 2 c,  7F c, bl c,
 1586: Create tag-end 2 c,  bl c, 01 c,
 1587: Create tag-bof 1 c,  0C c,
 1588: 
 1589: 2variable last-loadfilename 0 0 last-loadfilename 2!
 1590: 	    
 1591: : put-load-file-name ( -- )
 1592:     sourcefilename last-loadfilename 2@ d<>
 1593:     IF
 1594: 	tag-bof count tag-file-id write-line throw
 1595: 	sourcefilename 2dup
 1596: 	tag-file-id write-file throw
 1597: 	last-loadfilename 2!
 1598: 	s" ,0" tag-file-id write-line throw
 1599:     THEN ;
 1600: 
 1601: : cross-tag-entry  ( -- )
 1602:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
 1603:     IF
 1604: 	put-load-file-name
 1605: 	source >in @ min tag-file-id write-file throw
 1606: 	tag-beg count tag-file-id write-file throw
 1607: 	tlast @ >image count 1F and tag-file-id write-file throw
 1608: 	tag-end count tag-file-id write-file throw
 1609: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
 1610: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
 1611: 	s" ,0" tag-file-id write-line throw
 1612: 	base !
 1613:     THEN ;
 1614: 
 1615: \ Check for words
 1616: 
 1617: Defer skip? ' false IS skip?
 1618: 
 1619: : skipdef ( <name> -- )
 1620: \G skip definition of an undefined word in undef-words and
 1621: \G all-words mode
 1622:     ghost dup forward?
 1623:     IF  >magic <skip> swap !
 1624:     ELSE drop THEN ;
 1625: 
 1626: : tdefined? ( -- flag ) \ name
 1627:     ghost undefined? 0= ;
 1628: 
 1629: : defined2? ( -- flag ) \ name
 1630: \G return true for anything else than forward, even for <skip>
 1631: \G that's what we want
 1632:     ghost forward? 0= ;
 1633: 
 1634: : forced? ( -- flag ) \ name
 1635: \G return ture if it is a foreced skip with defskip
 1636:     ghost >magic @ <skip> = ;
 1637: 
 1638: : needed? ( -- flag ) \ name
 1639: \G returns a false flag when
 1640: \G a word is not defined
 1641: \G a forward reference exists
 1642: \G so the definition is not skipped!
 1643:     bl word gfind
 1644:     IF dup undefined?
 1645: 	nip
 1646: 	0=
 1647:     ELSE  drop true  THEN ;
 1648: 
 1649: : doer? ( -- flag ) \ name
 1650:     ghost >magic @ <do:> = ;
 1651: 
 1652: : skip-defs ( -- )
 1653:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
 1654: 
 1655: \ Target header creation
 1656: 
 1657: Variable NoHeaderFlag
 1658: NoHeaderFlag off
 1659: 
 1660: : 0.r ( n1 n2 -- ) 
 1661:     base @ >r hex 
 1662:     0 swap <# 0 ?DO # LOOP #> type 
 1663:     r> base ! ;
 1664: 
 1665: : .sym ( adr len -- )
 1666: \G escapes / and \ to produce sed output
 1667:   bounds 
 1668:   DO I c@ dup
 1669: 	CASE	[char] / OF drop ." \/" ENDOF
 1670: 		[char] \ OF drop ." \\" ENDOF
 1671: 		dup OF emit ENDOF
 1672: 	ENDCASE
 1673:     LOOP ;
 1674: 
 1675: : (Theader ( "name" -- ghost )
 1676:     \  >in @ bl word count type 2 spaces >in !
 1677:     \ wordheaders will always be compiled to rom
 1678:     switchrom
 1679:     \ build header in target
 1680:     NoHeaderFlag @
 1681:     IF  NoHeaderFlag off
 1682:     ELSE
 1683: 	T align H view,
 1684: 	tlast @ dup 0> IF tcell - THEN T A, H  there tlast !
 1685: 	1 headers-named +!	\ Statistic
 1686: 	>in @ T name, H >in !
 1687:     THEN
 1688:     T cfalign here H tlastcfa !
 1689:     \ Old Symbol table sed-script
 1690: \    >in @ cr ." sym:s/CFA=" there 4 0.r ." /"  bl word count .sym ." /g" cr >in !
 1691:     ghost
 1692:     \ output symbol table to extra file
 1693:     [ [IFDEF] fd-symbol-table ]
 1694:       base @ hex there s>d <# 8 0 DO # LOOP #> fd-symbol-table write-file throw base !
 1695:       s" :" fd-symbol-table write-file throw
 1696:       dup >ghostname fd-symbol-table write-line throw
 1697:     [ [THEN] ]
 1698:     dup Last-Header-Ghost !
 1699:     dup >magic ^imm !     \ a pointer for immediate
 1700:     Already @
 1701:     IF  dup >end tdoes !
 1702:     ELSE 0 tdoes !
 1703:     THEN
 1704:     alias-mask flag!
 1705:     cross-doc-entry cross-tag-entry ;
 1706: 
 1707: VARIABLE ;Resolve 1 cells allot
 1708: \ this is the resolver information from ":"
 1709: \ resolving is done by ";"
 1710: 
 1711: : Theader  ( "name" -- ghost )
 1712:   (THeader dup there resolve 0 ;Resolve ! ;
 1713: 
 1714: >TARGET
 1715: : Alias    ( cfa -- ) \ name
 1716:     >in @ skip? IF  2drop  EXIT  THEN  >in !
 1717:     dup 0< s" prims" T $has? H 0= and
 1718:     IF
 1719: 	.sourcepos ." needs prim: " >in @ bl word count type >in ! cr
 1720:     THEN
 1721:     (THeader over resolve T A, H alias-mask flag! ;
 1722: : Alias:   ( cfa -- ) \ name
 1723:     >in @ skip? IF  2drop  EXIT  THEN  >in !
 1724:     dup 0< s" prims" T $has? H 0= and
 1725:     IF
 1726: 	.sourcepos ." needs doer: " >in @ bl word count type >in ! cr
 1727:     THEN
 1728:     ghost tuck swap resolve <do:> swap >magic ! ;
 1729: 
 1730: Variable prim#
 1731: : first-primitive ( n -- )  prim# ! ;
 1732: : Primitive  ( -- ) \ name
 1733:     prim# @ T Alias H  -1 prim# +! ;
 1734: >CROSS
 1735: 
 1736: \ Conditionals and Comments                            11may93jaw
 1737: 
 1738: : ;Cond
 1739:   postpone ;
 1740:   swap ! ;  immediate
 1741: 
 1742: : Cond: ( -- ) \ name {code } ;
 1743:   atonce on
 1744:   ghost
 1745:   >exec
 1746:   :NONAME ;
 1747: 
 1748: : restrict? ( -- )
 1749: \ aborts on interprete state - ae
 1750:   state @ 0= ABORT" CROSS: Restricted" ;
 1751: 
 1752: : Comment ( -- )
 1753:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
 1754: 
 1755: Comment (       Comment \
 1756: 
 1757: \ compile                                              10may93jaw
 1758: 
 1759: : compile  ( -- ) \ name
 1760:   restrict?
 1761:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
 1762:   0> ( immediate? )
 1763:   IF    >exec @ compile,
 1764:   ELSE  postpone literal postpone gexecute  THEN ;
 1765:                                         immediate
 1766: 
 1767: : [G'] 
 1768: \G ticks a ghost and returns its address
 1769:   bl word gfind 0= ABORT" CROSS: Ghost don't exists"
 1770:   state @
 1771:   IF   postpone literal
 1772:   THEN ; immediate
 1773: 
 1774: : ghost>cfa
 1775:   dup undefined? ABORT" CROSS: forward " >link @ ;
 1776:                
 1777: >TARGET
 1778: 
 1779: : '  ( -- cfa ) 
 1780: \ returns the target-cfa of a ghost
 1781:   bl word gfind 0= ABORT" CROSS: Ghost don't exists"
 1782:   ghost>cfa ;
 1783: 
 1784: Cond: [']  T ' H alit, ;Cond
 1785: 
 1786: >CROSS
 1787: 
 1788: : [T']
 1789: \ returns the target-cfa of a ghost, or compiles it as literal
 1790:   postpone [G'] state @ IF postpone ghost>cfa ELSE ghost>cfa THEN ; immediate
 1791: 
 1792: \ \ threading modell					13dec92py
 1793: \ modularized						14jun97jaw
 1794: 
 1795: : fillcfa   ( usedcells -- )
 1796:   T cells H xt>body swap - 0 ?DO 0 X c, tchar +LOOP ;
 1797: 
 1798: : (>body)   ( cfa -- pfa ) xt>body + ;		' (>body) T IS >body H
 1799: 
 1800: : (doer,)   ( ghost -- ) ]comp gexecute comp[ 1 fillcfa ;   ' (doer,) IS doer,
 1801: 
 1802: : (docol,)  ( -- ) [G'] :docol doer, ;		' (docol,) IS docol,
 1803: 
 1804: : (doprim,) ( -- )
 1805:   there xt>body + ca>native T a, H 1 fillcfa ;	' (doprim,) IS doprim,
 1806: 
 1807: : (doeshandler,) ( -- ) 
 1808:   T cfalign H compile :doesjump T 0 , H ; 	' (doeshandler,) IS doeshandler,
 1809: 
 1810: : (dodoes,) ( does-action-ghost -- )
 1811:   ]comp [G'] :dodoes gexecute comp[
 1812:   addr,
 1813:   T here H tcell - reloff 2 fillcfa ;		' (dodoes,) IS dodoes,
 1814: 
 1815: : (lit,) ( n -- )   compile lit T  ,  H ;	' (lit,) IS lit,
 1816: 
 1817: \ if we dont produce relocatable code alit, defaults to lit, jaw
 1818: \ this is just for convenience, so we don't have to define alit,
 1819: \ seperately for embedded systems....
 1820: T has? relocate H
 1821: [IF]
 1822: : (alit,) ( n -- )  compile lit T  a, H ;	' (alit,) IS alit,
 1823: [ELSE]
 1824: : (alit,) ( n -- )  lit, ;			' (alit,) IS alit,
 1825: [THEN]
 1826: 
 1827: : (fini,)         compile ;s ;                ' (fini,) IS fini,
 1828: 
 1829: [IFUNDEF] (code) 
 1830: Defer (code)
 1831: Defer (end-code)
 1832: [THEN]
 1833: 
 1834: >TARGET
 1835: : Code
 1836:   defempty?
 1837:   (THeader there resolve
 1838:   [ T e? prims H 0= [IF] T e? ITC H [ELSE] true [THEN] ] [IF]
 1839:   doprim, 
 1840:   [THEN]
 1841:   depth (code) ;
 1842: 
 1843: : Code:
 1844:   defempty?
 1845:     ghost dup there ca>native resolve  <do:> swap >magic !
 1846:     depth (code) ;
 1847: 
 1848: : end-code
 1849:     (end-code)
 1850:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
 1851:     ELSE true ABORT" CROSS: Stack empty" THEN
 1852:     ;
 1853: 
 1854: >CROSS
 1855: 
 1856: \ tLiteral                                             12dec92py
 1857: 
 1858: >TARGET
 1859: Cond: \G  T-\G ;Cond
 1860: 
 1861: Cond:  Literal ( n -- )   restrict? lit, ;Cond
 1862: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
 1863: 
 1864: : Char ( "<char>" -- )  bl word char+ c@ ;
 1865: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
 1866: 
 1867: \ some special literals					27jan97jaw
 1868: 
 1869: \ !! Known Bug: Special Literals and plug-ins work only correct
 1870: \ on 16 and 32 Bit Targets and 32 Bit Hosts!
 1871: 
 1872: Cond: MAXU
 1873:   restrict? 
 1874:   tcell 1 cells u> 
 1875:   IF	compile lit tcell 0 ?DO FF T c, H LOOP 
 1876:   ELSE	ffffffff lit, THEN
 1877:   ;Cond
 1878: 
 1879: Cond: MINI
 1880:   restrict?
 1881:   tcell 1 cells u>
 1882:   IF	compile lit bigendian 
 1883:   	IF	80 T c, H tcell 1 ?DO 0 T c, H LOOP 
 1884:   	ELSE  	tcell 1 ?DO 0 T c, H LOOP 80 T c, H
 1885:   	THEN
 1886:   ELSE	tcell 2 = IF 8000 ELSE 80000000 THEN lit, THEN
 1887:   ;Cond
 1888:  
 1889: Cond: MAXI
 1890:  restrict?
 1891:  tcell 1 cells u>
 1892:  IF	compile lit bigendian 
 1893: 	IF 	7F T c, H tcell 1 ?DO FF T c, H LOOP
 1894: 	ELSE 	tcell 1 ?DO FF T c, H LOOP 7F T c, H
 1895:  	THEN
 1896:  ELSE	tcell 2 = IF 7fff ELSE 7fffffff THEN lit, THEN
 1897:  ;Cond
 1898: 
 1899: >CROSS
 1900: \ Target compiling loop                                12dec92py
 1901: \ ">tib trick thrown out                               10may93jaw
 1902: \ number? defined at the top                           11may93jaw
 1903: \ replaced >in by save-input				
 1904: 
 1905: : discard 0 ?DO drop LOOP ;
 1906: 
 1907: \ compiled word might leave items on stack!
 1908: : tcom ( x1 .. xn n name -- )
 1909: \  dup count type space
 1910:   gfind  ?dup
 1911:   IF    >r >r discard r> r>
 1912: 	0> IF	>exec @ execute
 1913: 	ELSE	gexecute  THEN 
 1914: 	EXIT 
 1915:   THEN
 1916:   number? dup  
 1917:   IF	0> IF swap lit,  THEN  lit, discard
 1918:   ELSE	2drop restore-input throw ghost gexecute THEN  ;
 1919: 
 1920: >TARGET
 1921: \ : ; DOES>                                            13dec92py
 1922: \ ]                                                     9may93py/jaw
 1923: 
 1924: : ] state on
 1925:     Compiling comp-state !
 1926:     BEGIN
 1927:         BEGIN save-input bl word
 1928:               dup c@ 0= WHILE drop discard refill 0=
 1929:               ABORT" CROSS: End of file while target compiling"
 1930:         REPEAT
 1931:         tcom
 1932:         state @
 1933:         0=
 1934:     UNTIL ;
 1935: 
 1936: \ by the way: defining a second interpreter (a compiler-)loop
 1937: \             is not allowed if a system should be ans conform
 1938: 
 1939: : : ( -- colon-sys ) \ Name
 1940:   defempty?
 1941:   constflag off \ don't let this flag work over colon defs
 1942: 		\ just to go sure nothing unwanted happens
 1943:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
 1944:   (THeader ;Resolve ! there ;Resolve cell+ !
 1945:   docol, ]comp depth T ] H ;
 1946: 
 1947: : :noname ( -- colon-sys )
 1948:   T cfalign H there docol, 0 ;Resolve ! depth T ] H ;
 1949: 
 1950: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
 1951: 
 1952: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
 1953: 
 1954: >CROSS
 1955: : LastXT ;Resolve @ 0= abort" CROSS: no definition for LastXT"
 1956:          ;Resolve cell+ @ ;
 1957: 
 1958: >TARGET
 1959: 
 1960: Cond: recurse ( -- ) Last-Ghost @ gexecute ;Cond
 1961: 
 1962: Cond: ; ( -- ) restrict?
 1963:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
 1964:                           ELSE true ABORT" CROSS: Stack empty" THEN
 1965:                fini,
 1966:                comp[
 1967:                state off
 1968:                ;Resolve @
 1969:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
 1970: 		Interpreting comp-state !
 1971:                ;Cond
 1972: Cond: [  restrict? state off Interpreting comp-state ! ;Cond
 1973: 
 1974: >CROSS
 1975: 
 1976: Create GhostDummy ghostheader
 1977: <res> GhostDummy >magic !
 1978: 
 1979: : !does ( does-action -- )
 1980: \ !! zusammenziehen und dodoes, machen!
 1981:     tlastcfa @ [G'] :dovar killref
 1982: \    tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
 1983: \ !! geht so nicht, da dodoes, ghost will!
 1984:     GhostDummy >link ! GhostDummy 
 1985:     tlastcfa @ >tempdp dodoes, tempdp> ;
 1986: 
 1987: >TARGET
 1988: Cond: DOES> restrict?
 1989:         compile (does>) doeshandler, 
 1990: 	\ resolve words made by builders
 1991: 	tdoes @ ?dup IF  @ T here H resolve THEN
 1992:         ;Cond
 1993: : DOES> switchrom doeshandler, T here H !does depth T ] H ;
 1994: 
 1995: >CROSS
 1996: \ Creation                                             01nov92py
 1997: 
 1998: \ Builder                                               11may93jaw
 1999: 
 2000: : Builder    ( Create-xt do:-xt "name" -- )
 2001: \ builds up a builder in current vocabulary
 2002: \ create-xt is executed when word is interpreted
 2003: \ do:-xt is executet when the created word from builder is executed
 2004: \ for do:-xt an additional entry after the normal ghost-enrys is used
 2005: 
 2006:   Make-Ghost 		( Create-xt do:-xt ghost )
 2007:   rot swap		( do:-xt Create-xt ghost )
 2008:   >exec ! , ;
 2009: \  rot swap >exec dup @ ['] NoExec <>
 2010: \  IF 2drop ELSE ! THEN , ;
 2011: 
 2012: : gdoes,  ( ghost -- )
 2013: \ makes the codefield for a word that is built
 2014:   >end @ dup undefined? 0=
 2015:   IF
 2016: 	dup >magic @ <do:> =
 2017: 	IF 	 doer, 
 2018: 	ELSE	dodoes,
 2019: 	THEN
 2020: 	EXIT
 2021:   THEN
 2022: \  compile :dodoes gexecute
 2023: \  T here H tcell - reloff 
 2024:   2 refered 
 2025:   0 fillcfa
 2026:   ;
 2027: 
 2028: : TCreate ( <name> -- )
 2029:   executed-ghost @
 2030:   create-forward-warn
 2031:   IF ['] reswarn-forward IS resolve-warning THEN
 2032:   Theader >r dup gdoes,
 2033: \ stores execution semantic in the built word
 2034: \ if the word already has a semantic (concerns S", IS, .", DOES>)
 2035: \ then keep it
 2036:   >end @ >exec @ r> >exec dup @ ['] NoExec =
 2037:   IF ! ELSE 2drop THEN ;
 2038: 
 2039: : RTCreate ( <name> -- )
 2040: \ creates a new word with code-field in ram
 2041:   executed-ghost @
 2042:   create-forward-warn
 2043:   IF ['] reswarn-forward IS resolve-warning THEN
 2044:   \ make Alias
 2045:   (THeader there 0 T a, H alias-mask flag! ( S executed-ghost new-ghost )
 2046:   \ store  poiter to code-field
 2047:   switchram T cfalign H
 2048:   there swap T ! H
 2049:   there tlastcfa ! 
 2050:   dup there resolve 0 ;Resolve !
 2051:   >r dup gdoes,
 2052: \ stores execution semantic in the built word
 2053: \ if the word already has a semantic (concerns S", IS, .", DOES>)
 2054: \ then keep it
 2055:   >end @ >exec @ r> >exec dup @ ['] NoExec =
 2056:   IF ! ELSE 2drop THEN ;
 2057: 
 2058: : Build:  ( -- [xt] [colon-sys] )
 2059:   :noname postpone TCreate ;
 2060: 
 2061: : BuildSmart:  ( -- [xt] [colon-sys] )
 2062:   :noname
 2063:   [ T has? rom H [IF] ]
 2064:   postpone RTCreate
 2065:   [ [ELSE] ]
 2066:   postpone TCreate 
 2067:   [ [THEN] ] ;
 2068: 
 2069: : gdoes>  ( ghost -- addr flag )
 2070:   executed-ghost @
 2071:   state @ IF  gexecute true EXIT  THEN
 2072:   >link @ T >body H false ;
 2073: 
 2074: \ DO: ;DO                                               11may93jaw
 2075: \ changed to ?EXIT                                      10may93jaw
 2076: 
 2077: : DO:     ( -- addr [xt] [colon-sys] )
 2078:   here ghostheader
 2079:   :noname postpone gdoes> postpone ?EXIT ;
 2080: 
 2081: : by:     ( -- addr [xt] [colon-sys] ) \ name
 2082:   ghost
 2083:   :noname postpone gdoes> postpone ?EXIT ;
 2084: 
 2085: : ;DO ( addr [xt] [colon-sys] -- addr )
 2086:   postpone ;    ( S addr xt )
 2087:   over >exec ! ; immediate
 2088: 
 2089: : by      ( -- addr ) \ Name
 2090:   ghost >end @ ;
 2091: 
 2092: >TARGET
 2093: \ Variables and Constants                              05dec92py
 2094: 
 2095: Build:  ( n -- ) ;
 2096: by: :docon ( ghost -- n ) T @ H ;DO
 2097: Builder (Constant)
 2098: 
 2099: Build:  ( n -- ) T , H ;
 2100: by (Constant)
 2101: Builder Constant
 2102: 
 2103: Build:  ( n -- ) T A, H ;
 2104: by (Constant)
 2105: Builder AConstant
 2106: 
 2107: Build:  ( d -- ) T , , H ;
 2108: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
 2109: Builder 2Constant
 2110: 
 2111: BuildSmart: ;
 2112: by: :dovar ( ghost -- addr ) ;DO
 2113: Builder Create
 2114: 
 2115: T has? rom H [IF]
 2116: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
 2117: by (Constant)
 2118: Builder Variable
 2119: [ELSE]
 2120: Build: T 0 , H ;
 2121: by Create
 2122: Builder Variable
 2123: [THEN]
 2124: 
 2125: T has? rom H [IF]
 2126: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , 0 , H ( switchrom ) ;
 2127: by (Constant)
 2128: Builder 2Variable
 2129: [ELSE]
 2130: Build: T 0 , 0 , H ;
 2131: by Create
 2132: Builder 2Variable
 2133: [THEN]
 2134: 
 2135: T has? rom H [IF]
 2136: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
 2137: by (Constant)
 2138: Builder AVariable
 2139: [ELSE]
 2140: Build: T 0 A, H ;
 2141: by Create
 2142: Builder AVariable
 2143: [THEN]
 2144: 
 2145: \ User variables                                       04may94py
 2146: 
 2147: >CROSS
 2148: 
 2149: Variable tup  0 tup !
 2150: Variable tudp 0 tudp !
 2151: 
 2152: : u,  ( n -- udp )
 2153:   tup @ tudp @ + T  ! H
 2154:   tudp @ dup T cell+ H tudp ! ;
 2155: 
 2156: : au, ( n -- udp )
 2157:   tup @ tudp @ + T A! H
 2158:   tudp @ dup T cell+ H tudp ! ;
 2159: 
 2160: >TARGET
 2161: 
 2162: Build: 0 u, X , ;
 2163: by: :douser ( ghost -- up-addr )  X @ tup @ + ;DO
 2164: Builder User
 2165: 
 2166: Build: 0 u, X , 0 u, drop ;
 2167: by User
 2168: Builder 2User
 2169: 
 2170: Build: 0 au, X , ;
 2171: by User
 2172: Builder AUser
 2173: 
 2174: BuildSmart: T , H ;
 2175: by (Constant)
 2176: Builder Value
 2177: 
 2178: BuildSmart: T A, H ;
 2179: by (Constant)
 2180: Builder AValue
 2181: 
 2182: BuildSmart:  ( -- ) [T'] noop T A, H ;
 2183: by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
 2184: Builder Defer
 2185: 
 2186: Build: ( inter comp -- ) swap T immediate A, A, H ;
 2187: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
 2188: Builder interpret/compile:
 2189: 
 2190: \ Sturctures                                           23feb95py
 2191: 
 2192: >CROSS
 2193: : nalign ( addr1 n -- addr2 )
 2194: \ addr2 is the aligned version of addr1 wrt the alignment size n
 2195:  1- tuck +  swap invert and ;
 2196: >TARGET
 2197: 
 2198: Build: ;
 2199: by: :dofield T @ H + ;DO
 2200: Builder (Field)
 2201: 
 2202: Build: ( align1 offset1 align size "name" --  align2 offset2 )
 2203:     rot dup T , H ( align1 align size offset1 )
 2204:     + >r nalign r> ;
 2205: by (Field)
 2206: Builder Field
 2207: 
 2208: : struct  T 1 chars 0 H ;
 2209: : end-struct  T 2Constant H ;
 2210: 
 2211: : cell% ( n -- size align )
 2212:     T 1 cells H dup ;
 2213: 
 2214: Build: ( m v -- m' v )  dup T , H cell+ ;
 2215: DO:  abort" Not in cross mode" ;DO
 2216: Builder input-method
 2217: 
 2218: Build: ( m v size -- m v' )  over T , H + ;
 2219: DO:  abort" Not in cross mode" ;DO
 2220: Builder input-var
 2221: 
 2222: \ structural conditionals                              17dec92py
 2223: 
 2224: >CROSS
 2225: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
 2226: : sys?        ( sys -- sys )    dup 0= ?struc ;
 2227: : >mark       ( -- sys )        T here  ( dup ." M" hex. ) 0 , H ;
 2228: 
 2229: : branchoffset ( src dest -- )  - tchar / ; \ ?? jaw
 2230: 
 2231: : >resolve    ( sys -- )        
 2232: 	X here ( dup ." >" hex. ) over branchoffset swap X ! ;
 2233: 
 2234: : <resolve    ( sys -- )
 2235: 	X here ( dup ." <" hex. ) branchoffset X , ;
 2236: 
 2237: :noname compile branch X here branchoffset X , ;
 2238:   IS branch, ( target-addr -- )
 2239: :noname compile ?branch X here branchoffset X , ;
 2240:   IS ?branch, ( target-addr -- )
 2241: :noname compile branch T here 0 , H ;
 2242:   IS branchmark, ( -- branchtoken )
 2243: :noname compile ?branch T here 0 , H ;
 2244:   IS ?branchmark, ( -- branchtoken )
 2245: :noname T here 0 , H ;
 2246:   IS ?domark, ( -- branchtoken )
 2247: :noname dup X @ ?struc X here over branchoffset swap X ! ;
 2248:   IS branchtoresolve, ( branchtoken -- )
 2249: :noname branchto, X here ;
 2250:   IS branchtomark, ( -- target-addr )
 2251: 
 2252: >TARGET
 2253: 
 2254: \ Structural Conditionals                              12dec92py
 2255: 
 2256: Cond: BUT       restrict? sys? swap ;Cond
 2257: Cond: YET       restrict? sys? dup ;Cond
 2258: 
 2259: >CROSS
 2260: 
 2261: Variable tleavings 0 tleavings !
 2262: 
 2263: : (done) ( addr -- )
 2264:     tleavings @
 2265:     BEGIN  dup
 2266:     WHILE
 2267: 	>r dup r@ cell+ @ \ address of branch
 2268: 	u> 0=	   \ lower than DO?	
 2269:     WHILE
 2270: 	r@ 2 cells + @ \ branch token
 2271: 	branchtoresolve,
 2272: 	r@ @ r> free throw
 2273:     REPEAT  r>  THEN
 2274:     tleavings ! drop ;
 2275: 
 2276: >TARGET
 2277: 
 2278: Cond: DONE   ( addr -- )  restrict? (done) ;Cond
 2279: 
 2280: >CROSS
 2281: : (leave) ( branchtoken -- )
 2282:     3 cells allocate throw >r
 2283:     T here H r@ cell+ !
 2284:     r@ 2 cells + !
 2285:     tleavings @ r@ !
 2286:     r> tleavings ! ;
 2287: >TARGET
 2288: 
 2289: Cond: LEAVE     restrict? branchmark, (leave) ;Cond
 2290: Cond: ?LEAVE    restrict? compile 0=  ?branchmark, (leave)  ;Cond
 2291: 
 2292: >CROSS
 2293: \ !!JW ToDo : Move to general tools section
 2294: 
 2295: : to1 ( x1 x2 xn n -- addr )
 2296: \G packs n stack elements in a allocated memory region
 2297:    dup dup 1+ cells allocate throw dup >r swap 1+
 2298:    0 DO tuck ! cell+ LOOP
 2299:    drop r> ;
 2300: : 1to ( addr -- x1 x2 xn )
 2301: \G unpacks the elements saved by to1
 2302:     dup @ swap over cells + swap
 2303:     0 DO  dup @ swap 1 cells -  LOOP
 2304:     free throw ;
 2305: 
 2306: : loop]     branchto, dup <resolve tcell - (done) ;
 2307: 
 2308: : skiploop] ?dup IF branchto, branchtoresolve, THEN ;
 2309: 
 2310: >TARGET
 2311: 
 2312: \ Structural Conditionals                              12dec92py
 2313: 
 2314: >TARGET
 2315: Cond: AHEAD     restrict? branchmark, ;Cond
 2316: Cond: IF        restrict? ?branchmark, ;Cond
 2317: Cond: THEN      restrict? sys? branchto, branchtoresolve, ;Cond
 2318: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
 2319: 
 2320: Cond: BEGIN     restrict? branchtomark, ;Cond
 2321: Cond: WHILE     restrict? sys? compile IF swap ;Cond
 2322: Cond: AGAIN     restrict? sys? branch, ;Cond
 2323: Cond: UNTIL     restrict? sys? ?branch, ;Cond
 2324: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
 2325: 
 2326: Cond: CASE      restrict? 0 ;Cond
 2327: Cond: OF        restrict? 1+ >r compile over compile =
 2328:                 compile IF compile drop r> ;Cond
 2329: Cond: ENDOF     restrict? >r compile ELSE r> ;Cond
 2330: Cond: ENDCASE   restrict? compile drop 0 ?DO  compile THEN  LOOP ;Cond
 2331: 
 2332: \ Structural Conditionals                              12dec92py
 2333: 
 2334: :noname \ ?? i think 0 is too much! jaw
 2335:     0 compile (do)
 2336:     branchtomark,  2 to1 ;
 2337:   IS do, ( -- target-addr )
 2338: 
 2339: \ :noname
 2340: \     compile 2dup compile = compile IF
 2341: \     compile 2drop compile ELSE
 2342: \     compile (do) branchtomark, 2 to1 ;
 2343: \   IS ?do,
 2344:     
 2345: :noname
 2346:     0 compile (?do)  ?domark, (leave)
 2347:     branchtomark,  2 to1 ;
 2348:   IS ?do, ( -- target-addr )
 2349: :noname compile (for) branchtomark, ;
 2350:   IS for, ( -- target-addr )
 2351: :noname 1to compile (loop)  loop] compile unloop skiploop] ;
 2352:   IS loop, ( target-addr -- )
 2353: :noname 1to compile (+loop)  loop] compile unloop skiploop] ;
 2354:   IS +loop, ( target-addr -- )
 2355: :noname compile (next)  loop] compile unloop ;
 2356:   IS next, ( target-addr -- )
 2357: 
 2358: Cond: DO      	restrict? do, ;Cond
 2359: Cond: ?DO     	restrict? ?do, ;Cond
 2360: Cond: FOR	restrict? for, ;Cond
 2361: 
 2362: Cond: LOOP	restrict? sys? loop, ;Cond
 2363: Cond: +LOOP	restrict? sys? +loop, ;Cond
 2364: Cond: NEXT	restrict? sys? next, ;Cond
 2365: 
 2366: \ String words                                         23feb93py
 2367: 
 2368: : ,"            [char] " parse T string, align H ;
 2369: 
 2370: Cond: ."        restrict? compile (.")     T ," H ;Cond
 2371: Cond: S"        restrict? compile (S")     T ," H ;Cond
 2372: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
 2373: 
 2374: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
 2375: : IS            T >address ' >body ! H ;
 2376: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
 2377: : TO            T ' >body ! H ;
 2378: 
 2379: Cond: defers	T ' >body @ compile, H ;Cond
 2380: : on		T -1 swap ! H ; 
 2381: : off   	T 0 swap ! H ;
 2382: 
 2383: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
 2384: 
 2385: \ linked list primitive
 2386: : linked        X here over X @ X A, swap X ! ;
 2387: : chained	T linked A, H ;
 2388: 
 2389: : err"   s" ErrLink linked" evaluate T , H
 2390:          [char] " parse T string, align H ;
 2391: 
 2392: : env"  [char] " parse s" EnvLink linked" evaluate
 2393:         T string, align , H ;
 2394: 
 2395: : 2env" [char] " parse s" EnvLink linked" evaluate
 2396:         here >r T string, align , , H
 2397:         r> dup T c@ H 80 and swap T c! H ;
 2398: 
 2399: \ compile must be last                                 22feb93py
 2400: 
 2401: Cond: compile ( -- ) restrict? \ name
 2402:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
 2403:       0> IF    gexecute
 2404:          ELSE  dup >magic @ <imm> =
 2405:                IF   gexecute
 2406:                ELSE compile (compile) addr, THEN THEN ;Cond
 2407: 
 2408: Cond: postpone ( -- ) restrict? \ name
 2409:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
 2410:       0> IF    gexecute
 2411:          ELSE  dup >magic @ <imm> =
 2412:                IF   gexecute
 2413: 	       ELSE compile (compile) addr, THEN THEN ;Cond
 2414: 	   
 2415: \ save-cross                                           17mar93py
 2416: 
 2417: hex
 2418: 
 2419: >CROSS
 2420: Create magic  s" Gforth2x" here over allot swap move
 2421: 
 2422: bigendian 1+ \ strangely, in magic big=0, little=1
 2423: tcell 1 = 0 and or
 2424: tcell 2 = 2 and or
 2425: tcell 4 = 4 and or
 2426: tcell 8 = 6 and or
 2427: tchar 1 = 00 and or
 2428: tchar 2 = 28 and or
 2429: tchar 4 = 50 and or
 2430: tchar 8 = 78 and or
 2431: magic 7 + c!
 2432: 
 2433: : save-cross ( "image-name" "binary-name" -- )
 2434:   bl parse ." Saving to " 2dup type cr
 2435:   w/o bin create-file throw >r
 2436:   TNIL IF
 2437:       s" #! "           r@ write-file throw
 2438:       bl parse          r@ write-file throw
 2439:       s"  --image-file" r@ write-file throw
 2440:       #lf       r@ emit-file throw
 2441:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
 2442:       ?do
 2443: 	  bl over emit-file throw
 2444:       loop
 2445:       drop
 2446:       magic 8       r@ write-file throw \ write magic
 2447:   ELSE
 2448:       bl parse 2drop
 2449:   THEN
 2450:   image @ there 
 2451:   r@ write-file throw \ write image
 2452:   TNIL IF
 2453:       bit$  @ there 1- tcell>bit rshift 1+
 2454:                 r@ write-file throw \ write tags
 2455:   THEN
 2456:   r> close-file throw ;
 2457: 
 2458: : save-region ( addr len -- )
 2459:   bl parse w/o bin create-file throw >r
 2460:   swap >image swap r@ write-file throw
 2461:   r> close-file throw ;
 2462: 
 2463: \ \ minimal definitions
 2464: 	   
 2465: >MINIMAL also minimal
 2466: 
 2467: \ Usefull words                                        13feb93py
 2468: 
 2469: : KB  400 * ;
 2470: 
 2471: \ \ [IF] [ELSE] [THEN] ...				14sep97jaw
 2472: 
 2473: \ it is useful to define our own structures and not to rely
 2474: \ on the words in the compiler
 2475: \ The words in the compiler might be defined with vocabularies
 2476: \ this doesn't work with our self-made compile-loop
 2477: 
 2478: Create parsed 20 chars allot	\ store word we parsed
 2479: 
 2480: : upcase
 2481:     parsed count bounds
 2482:     ?DO I c@ toupper I c! LOOP ;
 2483: 
 2484: : [ELSE]
 2485:     1 BEGIN
 2486: 	BEGIN bl word count dup WHILE
 2487: 	    comment? 20 umin parsed place upcase parsed count
 2488: 	    2dup s" [IF]" compare 0= >r 
 2489: 	    2dup s" [IFUNDEF]" compare 0= >r
 2490: 	    2dup s" [IFDEF]" compare 0= r> or r> or
 2491: 	    IF   2drop 1+
 2492: 	    ELSE 2dup s" [ELSE]" compare 0=
 2493: 		IF   2drop 1- dup
 2494: 		    IF 1+
 2495: 		    THEN
 2496: 		ELSE
 2497: 		    2dup s" [ENDIF]" compare 0= >r
 2498: 		    s" [THEN]" compare 0= r> or
 2499: 		    IF 1- THEN
 2500: 		THEN
 2501: 	    THEN
 2502: 	    ?dup 0= ?EXIT
 2503: 	REPEAT
 2504: 	2drop refill 0=
 2505:     UNTIL drop ; immediate
 2506:   
 2507: : [THEN] ( -- ) ; immediate
 2508: 
 2509: : [ENDIF] ( -- ) ; immediate
 2510: 
 2511: : [IF] ( flag -- )
 2512:     0= IF postpone [ELSE] THEN ; immediate 
 2513: 
 2514: Cond: [IF]      postpone [IF] ;Cond
 2515: Cond: [THEN]    postpone [THEN] ;Cond
 2516: Cond: [ELSE]    postpone [ELSE] ;Cond
 2517: 
 2518: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
 2519: 
 2520: : defined? tdefined? ;
 2521: : needed? needed? ;
 2522: : doer? doer? ;
 2523: 
 2524: \ we want to use IFDEF on compiler directives (e.g. E?) in the source, too
 2525: 
 2526: : directive? 
 2527:   bl word count [ ' target >wordlist ] literal search-wordlist 
 2528:   dup IF nip THEN ;
 2529: 
 2530: : [IFDEF]  >in @ directive? swap >in !
 2531: 	   0= IF tdefined? ELSE name 2drop true THEN
 2532: 	   postpone [IF] ;
 2533: 
 2534: : [IFUNDEF] tdefined? 0= postpone [IF] ;
 2535: 
 2536: Cond: [IFDEF]   postpone [IFDEF] ;Cond
 2537: 
 2538: Cond: [IFUNDEF] postpone [IFUNDEF] ;Cond
 2539: 
 2540: \ C: \- \+ Conditional Compiling                         09jun93jaw
 2541: 
 2542: : C: >in @ tdefined? 0=
 2543:      IF    >in ! X :
 2544:      ELSE drop
 2545:         BEGIN bl word dup c@
 2546:               IF   count comment? s" ;" compare 0= ?EXIT
 2547:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
 2548:               THEN
 2549:         AGAIN
 2550:      THEN ;
 2551: 
 2552: : d? d? ;
 2553: 
 2554: \G doesn't skip line when debug switch is on
 2555: : \D D? 0= IF postpone \ THEN ;
 2556: 
 2557: \G interprets the line if word is not defined
 2558: : \- tdefined? IF postpone \ THEN ;
 2559: 
 2560: \G interprets the line if word is defined
 2561: : \+ tdefined? 0= IF postpone \ THEN ;
 2562: 
 2563: Cond: \- \- ;Cond
 2564: Cond: \+ \+ ;Cond
 2565: Cond: \D \D ;Cond
 2566: 
 2567: : ?? bl word find IF execute ELSE drop 0 THEN ;
 2568: 
 2569: : needed:
 2570: \G defines ghost for words that we want to be compiled
 2571:   BEGIN >in @ bl word c@ WHILE >in ! ghost drop REPEAT drop ;
 2572: 
 2573: \ words that should be in minimal
 2574: 
 2575: create s-buffer 50 chars allot
 2576: 
 2577: bigendian Constant bigendian
 2578: 
 2579: : here there ;
 2580: : equ constant ;
 2581: : mark there constant ;
 2582: 
 2583: \ compiler directives
 2584: : >ram >ram ;
 2585: : >rom >rom ;
 2586: : >auto >auto ;
 2587: : >tempdp >tempdp ;
 2588: : tempdp> tempdp> ;
 2589: : const constflag on ;
 2590: : warnings name 3 = 0= twarnings ! drop ;
 2591: : | ;
 2592: \ : | NoHeaderFlag on ; \ This is broken (damages the last word)
 2593: 
 2594: : save-cross save-cross ;
 2595: : save-region save-region ;
 2596: : tdump swap >image swap dump ;
 2597: 
 2598: also forth 
 2599: [IFDEF] Label           : Label defempty? Label ; [THEN] 
 2600: [IFDEF] start-macros    : start-macros defempty? start-macros ; [THEN]
 2601: \ [IFDEF] builttag	: builttag builttag ;	[THEN]
 2602: previous
 2603: 
 2604: : s" [char] " parse s-buffer place s-buffer count ; \ for environment?
 2605: : + + ;
 2606: : 1+ 1 + ;
 2607: : 2+ 2 + ;
 2608: : 1- 1- ;
 2609: : - - ;
 2610: : and and ;
 2611: : or or ;
 2612: : 2* 2* ;
 2613: : * * ;
 2614: : / / ;
 2615: : dup dup ;
 2616: : over over ;
 2617: : swap swap ;
 2618: : rot rot ;
 2619: : drop drop ;
 2620: : =   = ;
 2621: : 0=   0= ;
 2622: : lshift lshift ;
 2623: : 2/ 2/ ;
 2624: : . . ;
 2625: 
 2626: : all-words    ['] forced?    IS skip? ;
 2627: : needed-words ['] needed?  IS skip? ;
 2628: : undef-words  ['] defined2? IS skip? ;
 2629: : skipdef skipdef ;
 2630: 
 2631: : \  postpone \ ;  immediate
 2632: : \G T-\G ; immediate
 2633: : (  postpone ( ;  immediate
 2634: : include bl word count included ;
 2635: : require require ;
 2636: : .( [char] ) parse type ;
 2637: : ." [char] " parse type ;
 2638: : cr cr ;
 2639: 
 2640: : times 0 ?DO dup X c, LOOP drop ; \ used for space table creation
 2641: 
 2642: \ only forth also cross also minimal definitions order
 2643: 
 2644: \ cross-compiler words
 2645: 
 2646: : decimal       decimal ;
 2647: : hex           hex ;
 2648: 
 2649: \ : tudp          X tudp ;
 2650: \ : tup           X tup ;
 2651: 
 2652: : doc-off       false to-doc ! ;
 2653: : doc-on        true  to-doc ! ;
 2654: 
 2655: [IFDEF] dbg : dbg dbg ; [THEN]
 2656: 
 2657: \ for debugging...
 2658: : order         order ;
 2659: : hwords         words ;
 2660: : words 	also ghosts words previous ;
 2661: : .s            .s ;
 2662: : bye           bye ;
 2663: 
 2664: \ turnkey direction
 2665: : H forth ; immediate
 2666: : T minimal ; immediate
 2667: : G ghosts ; immediate
 2668: 
 2669: : turnkey 
 2670:    \GFORTH 0 set-order also ghosts
 2671:    \ANSI [ ' ghosts >wordlist ] Literal 1 set-order
 2672:    also target definitions
 2673:    also Minimal also ;
 2674: 
 2675: \ these ones are pefered:
 2676: 
 2677: : lock   turnkey ;
 2678: : unlock previous forth also cross ;
 2679: 
 2680: \ also minimal
 2681: : [[ also unlock ;
 2682: : ]] previous previous also also ;
 2683: 
 2684: unlock definitions also minimal
 2685: : lock   lock ;
 2686: lock
 2687: 
 2688: \ load cross compiler extension defined in mach file
 2689: 
 2690: UNLOCK >CROSS
 2691: 
 2692: [IFDEF] extend-cross extend-cross [THEN]
 2693: 
 2694: LOCK

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