File:  [gforth] / gforth / cross.fs
Revision 1.166: download - view: text, annotated - select for diffs
Mon Dec 31 18:40:23 2007 UTC (11 years, 11 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright notices for GPL v3

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ Idea and implementation: Bernd Paysan (py)
    3: 
    4: \ Copyright (C) 1995,1996,1997,1998,1999,2000,2003,2004,2005,2006,2007 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 3
   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, see http://www.gnu.org/licenses/.
   20: 
   21: 0 
   22: [IF]
   23: 
   24: ToDo:
   25: - Crossdoc destination ./doc/crossdoc.fd makes no sense when
   26:   cross.fs is used seperately. jaw
   27: - Do we need this char translation with >address and in branchoffset? 
   28:   (>body also affected) jaw
   29: 
   30: [THEN]
   31: 
   32: s" compat/strcomp.fs" included
   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: 
   66: : >cross  also Cross definitions previous ;
   67: : >target also Target definitions previous ;
   68: : >minimal also Minimal definitions previous ;
   69: 
   70: H
   71: 
   72: >CROSS
   73: 
   74: \ Test against this definitions to find out whether we are cross-compiling
   75: \ may be usefull for assemblers
   76: 0 Constant gforth-cross-indicator
   77: 
   78: \ find out whether we are compiling with gforth
   79: 
   80: : defined? bl word find nip ;
   81: defined? emit-file defined? toupper and \ drop 0
   82: [IF]
   83: \ use this in a gforth system
   84: : \GFORTH ; immediate
   85: : \ANSI postpone \ ; immediate
   86: [ELSE]
   87: : \GFORTH postpone \ ; immediate
   88: : \ANSI ; immediate
   89: [THEN]
   90: 
   91: \ANSI : [IFUNDEF] defined? 0= postpone [IF] ; immediate
   92: \ANSI : [IFDEF] defined? postpone [IF] ; immediate
   93: 0 \ANSI drop 1
   94: [IF]
   95: : \G postpone \ ; immediate
   96: : rdrop postpone r> postpone drop ; immediate
   97: : name bl word count ;
   98: : bounds over + swap ;
   99: : scan >r BEGIN dup WHILE over c@ r@ <> WHILE 1 /string REPEAT THEN rdrop ;
  100: : linked here over @ , swap ! ;
  101: : alias create , DOES> @ EXECUTE ;
  102: : defer ['] noop alias ;
  103: : is state @ 
  104:   IF ' >body postpone literal postpone ! 
  105:   ELSE ' >body ! THEN ; immediate
  106: : 0>= 0< 0= ;
  107: : d<> rot <> -rot <> or ;
  108: : toupper dup [char] a [char] z 1+ within IF [char] A [char] a - + THEN ;
  109: Variable ebuf
  110: : emit-file ( c fd -- ior ) swap ebuf c! ebuf 1 chars rot write-file ;
  111: 0a Constant #lf
  112: 0d Constant #cr
  113: 
  114: [IFUNDEF] Warnings Variable Warnings [THEN]
  115: 
  116: \ \ Number parsing					23feb93py
  117: 
  118: \ number? number                                       23feb93py
  119: 
  120: Variable dpl
  121: 
  122: hex
  123: Create bases   10 ,   2 ,   A , 100 ,
  124: \              16     2    10   character
  125: 
  126: \ !! protect BASE saving wrapper against exceptions
  127: : getbase ( addr u -- addr' u' )
  128:     over c@ [char] $ - dup 4 u<
  129:     IF
  130: 	cells bases + @ base ! 1 /string
  131:     ELSE
  132: 	drop
  133:     THEN ;
  134: 
  135: : sign? ( addr u -- addr u flag )
  136:     over c@ [char] - =  dup >r
  137:     IF
  138: 	1 /string
  139:     THEN
  140:     r> ;
  141: 
  142: : s>unumber? ( addr u -- ud flag )
  143:     over [char] ' =
  144:     IF 	\ a ' alone is rather unusual :-)
  145: 	drop char+ c@ 0 true EXIT 
  146:     THEN
  147:     base @ >r  dpl on  getbase
  148:     0. 2swap
  149:     BEGIN ( d addr len )
  150: 	dup >r >number dup
  151:     WHILE \ there are characters left
  152: 	dup r> -
  153:     WHILE \ the last >number parsed something
  154: 	dup 1- dpl ! over c@ [char] . =
  155:     WHILE \ the current char is '.'
  156: 	1 /string
  157:     REPEAT  THEN \ there are unparseable characters left
  158: 	2drop false
  159:     ELSE
  160: 	rdrop 2drop true
  161:     THEN
  162:     r> base ! ;
  163: 
  164: \ ouch, this is complicated; there must be a simpler way - anton
  165: : s>number? ( addr len -- d f )
  166:     \ converts string addr len into d, flag indicates success
  167:     sign? >r
  168:     s>unumber?
  169:     0= IF
  170:         rdrop false
  171:     ELSE \ no characters left, all ok
  172: 	r>
  173: 	IF
  174: 	    dnegate
  175: 	THEN
  176: 	true
  177:     THEN ;
  178: 
  179: : s>number ( addr len -- d )
  180:     \ don't use this, there is no way to tell success
  181:     s>number? drop ;
  182: 
  183: : snumber? ( c-addr u -- 0 / n -1 / d 0> )
  184:     s>number? 0=
  185:     IF
  186: 	2drop false  EXIT
  187:     THEN
  188:     dpl @ dup 0< IF
  189: 	nip
  190:     ELSE
  191: 	1+
  192:     THEN ;
  193: 
  194: : number? ( string -- string 0 / n -1 / d 0> )
  195:     dup >r count snumber? dup if
  196: 	rdrop
  197:     else
  198: 	r> swap
  199:     then ;
  200: 
  201: : number ( string -- d )
  202:     number? ?dup 0= abort" ?"  0<
  203:     IF
  204: 	s>d
  205:     THEN ;
  206: 
  207: [THEN]
  208: 
  209: \ this provides assert( and struct stuff
  210: \GFORTH [IFUNDEF] assert1(
  211: \GFORTH also forth definitions require assert.fs previous
  212: \GFORTH [THEN]
  213: 
  214: >CROSS
  215: 
  216: hex     \ the defualt base for the cross-compiler is hex !!
  217: \ Warnings off
  218: 
  219: \ words that are generaly useful
  220: 
  221: : KB  400 * ;
  222: : >wordlist ( vocabulary-xt -- wordlist-struct )
  223:   also execute get-order swap >r 1- set-order r> ;
  224: 
  225: : umax 2dup u< IF swap THEN drop ;
  226: : umin 2dup u> IF swap THEN drop ;
  227: 
  228: : string, ( c-addr u -- )
  229:     \ puts down string as cstring
  230:     dup c, here swap chars dup allot move ;
  231: 
  232: : ," [char] " parse string, ;
  233: 
  234: : SetValue ( n -- <name> )
  235: \G Same behaviour as "Value" if the <name> is not defined
  236: \G Same behaviour as "to" if <name> is defined
  237: \G SetValue searches in the current vocabulary
  238:   save-input bl word >r restore-input throw r> count
  239:   get-current search-wordlist
  240:   IF	drop >r
  241: 	\ we have to set current to be topmost context wordlist
  242: 	get-order get-order get-current swap 1+ set-order
  243: 	r> ['] to execute
  244: 	set-order
  245:   ELSE Value THEN ;
  246: 
  247: : DefaultValue ( n -- <name> )
  248: \G Same behaviour as "Value" if the <name> is not defined
  249: \G DefaultValue searches in the current vocabulary
  250:  save-input bl word >r restore-input throw r> count
  251:  get-current search-wordlist
  252:  IF bl word drop 2drop ELSE Value THEN ;
  253: 
  254: hex
  255: 
  256: \ FIXME delete`
  257: \ 1 Constant Cross-Flag	\ to check whether assembler compiler plug-ins are
  258: 			\ for cross-compiling
  259: \ No! we use "[IFUNDEF]" there to find out whether we are target compiling!!!
  260: 
  261: \ FIXME move down
  262: : comment? ( c-addr u -- c-addr u )
  263:         2dup s" (" str=
  264:         IF    postpone (
  265:         ELSE  2dup s" \" str= IF postpone \ THEN
  266:         THEN ;
  267: 
  268: : X ( -- <name> )
  269: \G The next word in the input is a target word.
  270: \G Equivalent to T <name> but without permanent
  271: \G switch to target dictionary. Used as prefix e.g. for @, !, here etc.
  272:   bl word count [ ' target >wordlist ] Literal search-wordlist
  273:   IF state @ IF compile, ELSE execute THEN
  274:   ELSE	-1 ABORT" Cross: access method not supported!"
  275:   THEN ; immediate
  276: 
  277: \ Begin CROSS COMPILER:
  278: 
  279: \ debugging
  280: 
  281: 0 [IF]
  282: 
  283: This implements debugflags for the cross compiler and the compiled
  284: images. It works identical to the has-flags in the environment.
  285: The debugflags are defined in a vocabluary. If the word exists and
  286: its value is true, the flag is switched on.
  287: 
  288: [THEN]
  289: 
  290: >CROSS
  291: 
  292: Vocabulary debugflags	\ debug flags for cross
  293: also debugflags get-order over
  294: Constant debugflags-wl
  295: set-order previous
  296: 
  297: : DebugFlag
  298:   get-current >r debugflags-wl set-current
  299:   SetValue
  300:   r> set-current ;
  301: 
  302: : Debug? ( adr u -- flag )
  303: \G return true if debug flag is defined or switched on
  304:   debugflags-wl search-wordlist
  305:   IF EXECUTE
  306:   ELSE false THEN ;
  307: 
  308: : D? ( <name> -- flag )
  309: \G return true if debug flag is defined or switched on
  310: \G while compiling we do not return the current value but
  311:   bl word count debug? ;
  312: 
  313: : [d?]
  314: \G compile the value-xt so the debug flag can be switched
  315: \G the flag must exist!
  316:   bl word count debugflags-wl search-wordlist
  317:   IF 	compile,
  318:   ELSE  -1 ABORT" unknown debug flag"
  319: 	\ POSTPONE false 
  320:   THEN ; immediate
  321: 
  322: : symentry ( adr len taddr -- )
  323: \G Produce a symbol table (an optional symbol address
  324: \G map) if wanted
  325:     [ [IFDEF] fd-symbol-table ]
  326:       base @ swap hex s>d <# 8 0 DO # LOOP #> fd-symbol-table write-file throw base !
  327:       s" :" fd-symbol-table write-file throw
  328:       fd-symbol-table write-line throw
  329:     [ [ELSE] ]
  330:       2drop drop
  331:     [ [THEN] ] ;
  332: 
  333: 
  334: \ \ --------------------	source file
  335: 
  336: decimal
  337: 
  338: Variable cross-file-list
  339: 0 cross-file-list !
  340: Variable target-file-list
  341: 0 target-file-list !
  342: Variable host-file-list
  343: 0 host-file-list !
  344: 
  345: cross-file-list Value file-list
  346: 0 Value source-desc
  347: 
  348: \ file loading
  349: 
  350: : >fl-id   1 cells + ;
  351: : >fl-name 2 cells + ;
  352: 
  353: Variable filelist 0 filelist !
  354: Create NoFile ," #load-file#"
  355: 
  356: : loadfile ( -- adr )
  357:   source-desc ?dup IF >fl-name ELSE NoFile THEN ;
  358: 
  359: : sourcefilename ( -- adr len ) 
  360:   loadfile count ;
  361: 
  362: \ANSI : sourceline# 0 ;
  363: 
  364: \ \ --------------------	path handling from kernel/paths.fs
  365: 
  366: \ paths.fs path file handling                                    03may97jaw
  367: 
  368: \ -Changing the search-path:
  369: \ fpath+ <path> 	adds a directory to the searchpath
  370: \ fpath= <path>|<path>	makes complete now searchpath
  371: \ 			seperator is |
  372: \ .fpath		displays the search path
  373: \ remark I: 
  374: \ a ./ in the beginning of filename is expanded to the directory the
  375: \ current file comes from. ./ can also be included in the search-path!
  376: \ ~+/ loads from the current working directory
  377: 
  378: \ remark II:
  379: \ if there is no sufficient space for the search path increase it!
  380: 
  381: 
  382: \ -Creating custom paths:
  383: 
  384: \ It is possible to use the search mechanism on yourself.
  385: 
  386: \ Make a buffer for the path:
  387: \ create mypath	100 chars , 	\ maximum length (is checked)
  388: \ 		0 ,		\ real len
  389: \ 		100 chars allot \ space for path
  390: \ use the same functions as above with:
  391: \ mypath path+ 
  392: \ mypath path=
  393: \ mypath .path
  394: 
  395: \ do a open with the search path:
  396: \ open-path-file ( adr len path -- fd adr len ior )
  397: \ the file is opened read-only; if the file is not found an error is generated
  398: 
  399: \ questions to: wilke@jwdt.com
  400: 
  401: [IFUNDEF] +place
  402: : +place ( adr len adr )
  403:         2dup >r >r
  404:         dup c@ char+ + swap move
  405:         r> r> dup c@ rot + swap c! ;
  406: [THEN]
  407: 
  408: [IFUNDEF] place
  409: : place ( c-addr1 u c-addr2 )
  410:         2dup c! char+ swap move ;
  411: [THEN]
  412: 
  413: \ if we have path handling, use this and the setup of it
  414: [IFUNDEF] open-fpath-file
  415: 
  416: create sourcepath 1024 chars , 0 , 1024 chars allot \ !! make this dynamic
  417: sourcepath value fpath
  418: 
  419: : also-path ( adr len path^ -- )
  420:   >r
  421:   \ len check
  422:   r@ cell+ @ over + r@ @ u> ABORT" path buffer too small!"
  423:   \ copy into
  424:   tuck r@ cell+ dup @ cell+ + swap cmove
  425:   \ make delimiter
  426:   0 r@ cell+ dup @ cell+ + 2 pick + c! 1 + r> cell+ +!
  427:   ;
  428: 
  429: : only-path ( adr len path^ -- )
  430:   dup 0 swap cell+ ! also-path ;
  431: 
  432: : path+ ( path-addr  "dir" -- ) \ gforth
  433:     \G Add the directory @var{dir} to the search path @var{path-addr}.
  434:     name rot also-path ;
  435: 
  436: : fpath+ ( "dir" ) \ gforth
  437:     \G Add directory @var{dir} to the Forth search path.
  438:     fpath path+ ;
  439: 
  440: : path= ( path-addr "dir1|dir2|dir3" ) \ gforth
  441:     \G Make a complete new search path; the path separator is |.
  442:     name 2dup bounds ?DO i c@ [char] | = IF 0 i c! THEN LOOP
  443:     rot only-path ;
  444: 
  445: : fpath= ( "dir1|dir2|dir3" ) \ gforth
  446:     \G Make a complete new Forth search path; the path separator is |.
  447:     fpath path= ;
  448: 
  449: : path>string  cell+ dup cell+ swap @ ;
  450: 
  451: : next-path ( adr len -- adr2 len2 )
  452:   2dup 0 scan
  453:   dup 0= IF     2drop 0 -rot 0 -rot EXIT THEN
  454:   >r 1+ -rot r@ 1- -rot
  455:   r> - ;
  456: 
  457: : previous-path ( path^ -- )
  458:   dup path>string
  459:   BEGIN tuck dup WHILE repeat ;
  460: 
  461: : .path ( path-addr -- ) \ gforth
  462:     \G Display the contents of the search path @var{path-addr}.
  463:     path>string
  464:     BEGIN next-path dup WHILE type space REPEAT 2drop 2drop ;
  465: 
  466: : .fpath ( -- ) \ gforth
  467:     \G Display the contents of the Forth search path.
  468:     fpath .path ;
  469: 
  470: : absolut-path? ( addr u -- flag ) \ gforth
  471:     \G A path is absolute if it starts with a / or a ~ (~ expansion),
  472:     \G or if it is in the form ./*, extended regexp: ^[/~]|./, or if
  473:     \G it has a colon as second character ("C:...").  Paths simply
  474:     \G containing a / are not absolute!
  475:     2dup 2 u> swap 1+ c@ [char] : = and >r \ dos absoulte: c:/....
  476:     over c@ [char] / = >r
  477:     over c@ [char] ~ = >r
  478:     \ 2dup S" ../" string-prefix? r> or >r \ not catered for in expandtopic
  479:     S" ./" string-prefix?
  480:     r> r> r> or or or ;
  481: 
  482: Create ofile 0 c, 255 chars allot
  483: Create tfile 0 c, 255 chars allot
  484: 
  485: : pathsep? dup [char] / = swap [char] \ = or ;
  486: 
  487: : need/   ofile dup c@ + c@ pathsep? 0= IF s" /" ofile +place THEN ;
  488: 
  489: : extractpath ( adr len -- adr len2 )
  490:   BEGIN dup WHILE 1-
  491:         2dup + c@ pathsep? IF EXIT THEN
  492:   REPEAT ;
  493: 
  494: : remove~+ ( -- )
  495:     ofile count s" ~+/" string-prefix?
  496:     IF
  497: 	ofile count 3 /string ofile place
  498:     THEN ;
  499: 
  500: : expandtopic ( -- ) \ stack effect correct? - anton
  501:     \ expands "./" into an absolute name
  502:     ofile count s" ./" string-prefix?
  503:     IF
  504: 	ofile count 1 /string tfile place
  505: 	0 ofile c! sourcefilename extractpath ofile place
  506: 	ofile c@ IF need/ THEN
  507: 	tfile count over c@ pathsep? IF 1 /string THEN
  508: 	ofile +place
  509:     THEN ;
  510: 
  511: : compact.. ( adr len -- adr2 len2 )
  512:     \ deletes phrases like "xy/.." out of our directory name 2dec97jaw
  513:     over swap
  514:     BEGIN  dup  WHILE
  515:         dup >r '/ scan 2dup s" /../" string-prefix?
  516:         IF
  517:             dup r> - >r 4 /string over r> + 4 -
  518:             swap 2dup + >r move dup r> over -
  519:         ELSE
  520:             rdrop dup 1 min /string
  521:         THEN
  522:     REPEAT  drop over - ;
  523: 
  524: : reworkdir ( -- )
  525:   remove~+
  526:   ofile count compact..
  527:   nip ofile c! ;
  528: 
  529: : open-ofile ( -- fid ior )
  530:     \G opens the file whose name is in ofile
  531:     expandtopic reworkdir
  532:     ofile count r/o open-file ;
  533: 
  534: : check-path ( adr1 len1 adr2 len2 -- fd 0 | 0 <>0 )
  535:   0 ofile ! >r >r ofile place need/
  536:   r> r> ofile +place
  537:   open-ofile ;
  538: 
  539: : open-path-file ( addr1 u1 path-addr -- wfileid addr2 u2 0 | ior ) \ gforth
  540:     \G Look in path @var{path-addr} for the file specified by @var{addr1 u1}.
  541:     \G If found, the resulting path and an open file descriptor
  542:     \G are returned. If the file is not found, @var{ior} is non-zero.
  543:   >r
  544:   2dup absolut-path?
  545:   IF    rdrop
  546:         ofile place open-ofile
  547: 	dup 0= IF >r ofile count r> THEN EXIT
  548:   ELSE  r> path>string
  549:         BEGIN  next-path dup
  550:         WHILE  5 pick 5 pick check-path
  551:         0= IF >r 2drop 2drop r> ofile count 0 EXIT ELSE drop THEN
  552:   REPEAT
  553:         2drop 2drop 2drop -38
  554:   THEN ;
  555: 
  556: : open-fpath-file ( addr1 u1 -- wfileid addr2 u2 0 | ior ) \ gforth
  557:     \G Look in the Forth search path for the file specified by @var{addr1 u1}.
  558:     \G If found, the resulting path and an open file descriptor
  559:     \G are returned. If the file is not found, @var{ior} is non-zero.
  560:     fpath open-path-file ;
  561: 
  562: fpath= ~+
  563: 
  564: [THEN]
  565: 
  566: \ \ --------------------	include require			13may99jaw
  567: 
  568: >CROSS
  569: 
  570: : add-included-file ( adr len -- adr )
  571:   dup >fl-name char+ allocate throw >r
  572:   file-list @ r@ ! r@ file-list !
  573:   r@ >fl-name place r> ;
  574: 
  575: : included? ( c-addr u -- f )
  576:   file-list
  577:   BEGIN	@ dup
  578:   WHILE	>r 2dup r@ >fl-name count str=
  579: 	IF rdrop 2drop true EXIT THEN
  580: 	r>
  581:   REPEAT
  582:   2drop drop false ;	
  583: 
  584: false DebugFlag showincludedfiles
  585: 
  586: : included1 ( fd adr u -- )
  587: \ include file adr u / fd
  588: \ we don't use fd with include-file, because the forth system
  589: \ doesn't know the name of the file to get a nice error report
  590:   [d?] showincludedfiles
  591:   IF	cr ." Including: " 2dup type ." ..." THEN
  592:   rot close-file throw
  593:   source-desc >r
  594:   add-included-file to source-desc 
  595:   sourcefilename
  596:   ['] included catch
  597:   r> to source-desc 
  598:   throw ;
  599: 
  600: : included ( adr len -- )
  601: 	cross-file-list to file-list
  602: 	open-fpath-file throw 
  603:         included1 ;
  604: 
  605: : required ( adr len -- )
  606: 	cross-file-list to file-list
  607: 	open-fpath-file throw \ 2dup cr ." R:" type
  608: 	2dup included?
  609: 	IF 	2drop close-file throw
  610: 	ELSE	included1
  611: 	THEN ;
  612: 
  613: : include bl word count included ;
  614: 
  615: : require bl word count required ;
  616: 
  617: 0 [IF]
  618: 
  619: also forth definitions previous
  620: 
  621: : included ( adr len -- ) included ;
  622: 
  623: : required ( adr len -- ) required ;
  624: 
  625: : include include ;
  626: 
  627: : require require ;
  628: 
  629: [THEN]
  630: 
  631: >CROSS
  632: hex
  633: 
  634: \ \ --------------------        Error Handling                  05aug97jaw
  635: 
  636: \ Flags
  637: 
  638: also forth definitions  \ these values may be predefined before
  639:                         \ the cross-compiler is loaded
  640: 
  641: false DefaultValue stack-warn   	 \ check on empty stack at any definition
  642: false DefaultValue create-forward-warn   \ warn on forward declaration of created words
  643: 
  644: previous >CROSS
  645: 
  646: : .dec
  647:   base @ decimal swap . base ! ;
  648: 
  649: : .sourcepos
  650:   cr sourcefilename type ." :"
  651:   sourceline# .dec ;
  652: 
  653: : warnhead
  654: \G display error-message head
  655: \G perhaps with linenumber and filename
  656:   .sourcepos ." Warning: " ;
  657: 
  658: : empty? depth IF .sourcepos ." Stack not empty!"  THEN ;
  659: 
  660: stack-warn [IF]
  661: : defempty? empty? ;
  662: [ELSE]
  663: : defempty? ; immediate
  664: \ : defempty? .sourcepos ; 
  665: [THEN]
  666: 
  667: \ \ --------------------        Compiler Plug Ins               01aug97jaw
  668: 
  669: >CROSS
  670: 
  671: \ Compiler States
  672: 
  673: Variable comp-state
  674: 0 Constant interpreting
  675: 1 Constant compiling
  676: 2 Constant resolving
  677: 3 Constant assembling
  678: 
  679: : compiling? comp-state @ compiling = ;
  680: 
  681: : pi-undefined -1 ABORT" Plugin undefined" ;
  682: 
  683: : Plugin ( -- : pluginname )
  684:   Create 
  685:   \ for normal cross-compiling only one action
  686:   \ exists, this fields are identical. For the instant
  687:   \ simulation environment we need, two actions for each plugin
  688:   \ the target one and the one that generates the simulation code
  689:   ['] pi-undefined , \ action
  690:   ['] pi-undefined , \ target plugin action
  691:   8765 ,     \ plugin magic
  692:   DOES> perform ;
  693: 
  694: Plugin DummyPlugin
  695: 
  696: : 'PI ( -- addr : pluginname )
  697:   ' >body dup 2 cells + @ 8765 <> ABORT" not a plugin" ;
  698: 
  699: : plugin-of ( xt -- : pluginname )
  700:   dup 'PI 2! ;
  701: 
  702: : action-of ( xt -- : plunginname )
  703:   'PI cell+ ! ;
  704: 
  705: : TPA ( -- : plugin )
  706: \ target plugin action
  707: \ executes current target action of plugin
  708:   'PI cell+ POSTPONE literal POSTPONE perform ; immediate
  709: 
  710: Variable ppi-temp 0 ppi-temp !
  711: 
  712: : pa:
  713: \g define plugin action
  714:   ppi-temp @ ABORT" pa: definition not closed"
  715:   'PI ppi-temp ! :noname ;
  716: 
  717: : ;pa
  718: \g end a definition for plugin action
  719:   POSTPONE ; ppi-temp @ ! 0 ppi-temp ! ; immediate
  720: 
  721: 
  722: Plugin dlit, ( d -- )			\ compile numerical value the target
  723: Plugin lit, ( n -- )
  724: Plugin alit, ( n -- )
  725: 
  726: Plugin branch, ( target-addr -- )	\ compiles a branch
  727: Plugin ?branch, ( target-addr -- )	\ compiles a ?branch
  728: Plugin branchmark, ( -- branch-addr )	\ reserves room for a branch
  729: Plugin ?branchmark, ( -- branch-addr )	\ reserves room for a ?branch
  730: Plugin ?domark, ( -- branch-addr )	\ reserves room for a ?do branch
  731: Plugin branchto, ( -- )			\ actual program position is target of a branch (do e.g. alignment)
  732: ' NOOP plugin-of branchto, 
  733: Plugin branchtoresolve, ( branch-addr -- ) \ resolves a forward reference from branchmark
  734: Plugin branchtomark, ( -- target-addr )	\ marks a branch destination
  735: 
  736: Plugin colon, ( tcfa -- )		\ compiles call to tcfa at current position
  737: Plugin prim, ( tcfa -- )		\ compiles primitive invocation
  738: Plugin colonmark, ( -- addr )		\ marks a colon call
  739: Plugin colon-resolve ( tcfa addr -- )
  740: 
  741: Plugin addr-resolve ( target-addr addr -- )
  742: Plugin doer-resolve ( ghost res-pnt target-addr addr -- ghost res-pnt )
  743: 
  744: Plugin ncontrols? ( [ xn ... x1 ] n -- ) \ checks wheter n control structures are open
  745: Plugin if, 	( -- if-token )
  746: Plugin else,	( if-token -- if-token )
  747: Plugin then,	( if-token -- )
  748: Plugin ahead,
  749: Plugin begin,
  750: Plugin while,
  751: Plugin until,
  752: Plugin again,
  753: Plugin repeat,
  754: Plugin cs-swap	( x1 x2 -- x2 x1 )
  755: 
  756: Plugin case,	( -- n )
  757: Plugin of,	( n -- x1 n )
  758: Plugin endof,	( x1 n -- x2 n )
  759: Plugin endcase,	( x1 .. xn n -- )
  760: 
  761: Plugin do,	( -- do-token )
  762: Plugin ?do,	( -- ?do-token )
  763: Plugin for,	( -- for-token )
  764: Plugin loop,	( do-token / ?do-token -- )
  765: Plugin +loop,	( do-token / ?do-token -- )
  766: Plugin next,	( for-token )
  767: Plugin leave,	( -- )
  768: Plugin ?leave, 	( -- )
  769: 
  770: Plugin ca>native  \ Convert a code address to the processors
  771:                   \ native address. This is used in doprim, and
  772:                   \ code/code: primitive definitions word to
  773:                   \ convert the addresses.
  774:                   \ The only target where we need this is the misc
  775:                   \ which is a 16 Bit processor with word addresses
  776:                   \ but the forth system we build has a normal byte
  777:                   \ addressed memory model    
  778: 
  779: Plugin doprim,	\ compiles start of a primitive
  780: Plugin docol,   	\ compiles start of a colon definition
  781: Plugin doer,		
  782: Plugin fini,      \ compiles end of definition ;s
  783: Plugin doeshandler,
  784: Plugin dodoes,
  785: 
  786: Plugin colon-start
  787: ' noop plugin-of colon-start
  788: Plugin colon-end
  789: ' noop plugin-of colon-end
  790: 
  791: Plugin ]comp     \ starts compilation
  792: ' noop plugin-of ]comp
  793: Plugin comp[     \ ends compilation
  794: ' noop plugin-of comp[
  795: 
  796: Plugin t>body             \ we need the system >body
  797: 			\ and the target >body
  798: 
  799: >TARGET
  800: : >body t>body ;
  801: 
  802: 
  803: \ Ghost Builder                                        06oct92py
  804: 
  805: >CROSS
  806: hex
  807: \ Values for ghost magic
  808: 4711 Constant <fwd>             4712 Constant <res>
  809: 4713 Constant <imm>             4714 Constant <do:>
  810: 4715 Constant <skip>
  811: 
  812: \ Bitmask for ghost flags
  813: 1 Constant <unique>
  814: 2 Constant <primitive>
  815: 
  816: \ FXIME: move this to general stuff?
  817: : set-flag ( addr flag -- )
  818:   over @ or swap ! ;
  819: 
  820: : reset-flag ( addr flag -- )
  821:   invert over @ and swap ! ;
  822: 
  823: : get-flag ( addr flag -- f )
  824:   swap @ and 0<> ;
  825:   
  826: 
  827: Struct
  828: 
  829:   \ link to next ghost (always the first element)
  830:   cell% field >next-ghost
  831: 
  832:   \ type of ghost
  833:   cell% field >magic
  834: 		
  835:   \ pointer where ghost is in target, or if unresolved
  836:   \ points to the where we have to resolve (linked-list)
  837:   cell% field >link
  838: 
  839:   \ execution semantics (while target compiling) of ghost
  840:   cell% field >exec
  841: 
  842:   \ compilation action of this ghost; this is what is
  843:   \ done to compile a call (or whatever) to this definition.
  844:   \ E.g. >comp contains the semantic of postpone s"
  845:   \ whereas >exec-compile contains the semantic of s"
  846:   cell% field >comp
  847: 
  848:   \ Compilation sematics (while parsing) of this ghost. E.g. 
  849:   \ "\" will skip the rest of line.
  850:   \ These semantics are defined by Cond: and
  851:   \ if a word is made immediate in instant, then the >exec2 field
  852:   \ gets copied to here
  853:   cell% field >exec-compile
  854: 
  855:   \ Additional execution semantics of this ghost. This is used
  856:   \ for code generated by instant and for the doer-xt of created
  857:   \ words
  858:   cell% field >exec2
  859: 
  860:   cell% field >created
  861: 
  862:   \ the xt of the created ghost word itself
  863:   cell% field >ghost-xt
  864: 
  865:   \ pointer to the counted string of the assiciated
  866:   \ assembler label
  867:   cell% field >asm-name
  868: 
  869:   \ mapped primitives have a special address, so
  870:   \ we are able to detect them
  871:   cell% field >asm-dummyaddr
  872: 			
  873:   \ for builder (create, variable...) words
  874:   \ the execution symantics of words built are placed here
  875:   \ this is a doer ghost or a dummy ghost
  876:   cell% field >do:ghost
  877: 
  878:   cell% field >ghost-flags
  879: 
  880:   cell% field >ghost-name
  881: 
  882: End-Struct ghost-struct
  883: 
  884: Variable ghost-list
  885: 0 ghost-list !
  886: 
  887: Variable executed-ghost \ last executed ghost, needed in tcreate and gdoes>
  888: \ Variable last-ghost	\ last ghost that is created
  889: Variable last-header-ghost \ last ghost definitions with header
  890: 
  891: \ space for ghosts resolve structure
  892: \ we create ghosts in a sepearte space
  893: \ and not to the current host dp, because this
  894: \ gives trouble with instant while compiling and creating
  895: \ a ghost for a forward reference
  896: \ BTW: we cannot allocate another memory region
  897: \ because allot will check the overflow!!
  898: Variable cross-space-dp
  899: Create cross-space 250000 allot here 100 allot align 
  900: Constant cross-space-end
  901: cross-space cross-space-dp !
  902: Variable cross-space-dp-orig
  903: 
  904: : cross-space-used cross-space-dp @ cross-space - ;
  905: 
  906: : >space ( -- )
  907:   dp @ cross-space-dp-orig !
  908:   cross-space-dp @ dp ! ;
  909: 
  910: : space> ( -- )
  911:   dp @ dup cross-space-dp !
  912:   cross-space-end u> ABORT" CROSS: cross-space overflow"
  913:   cross-space-dp-orig @ dp ! ;
  914: 
  915: \ this is just for debugging, to see this in the backtrace
  916: : execute-exec execute ;
  917: : execute-exec2 execute ;
  918: : execute-exec-compile execute ;
  919: 
  920: : NoExec
  921:   executed-ghost @ >exec2 @
  922:   ?dup 
  923:   IF   execute-exec2
  924:   ELSE true ABORT" CROSS: Don't execute ghost, or immediate target word"
  925:   THEN ;
  926: 
  927: Defer is-forward
  928: 
  929: : (ghostheader) ( -- )
  930:     ghost-list linked <fwd> , 0 , ['] NoExec , ['] is-forward ,
  931:     0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , ;
  932: 
  933: : ghostheader ( -- ) (ghostheader) 0 , ;
  934: 
  935: ' Ghosts >wordlist Constant ghosts-wordlist
  936: 
  937: \ the current wordlist for ghost definitions in the host
  938: ghosts-wordlist Value current-ghosts
  939: 
  940: : Make-Ghost ( "name" -- ghost )
  941:   >space
  942:   \ save current and create in ghost vocabulary
  943:   get-current >r current-ghosts set-current
  944:   >in @ Create >in !
  945:   \ some forth systems like iForth need the immediate directly
  946:   \ after the word is created
  947:   \ restore current
  948:   r> set-current
  949:   here (ghostheader)
  950:   bl word count string, align
  951:   space>
  952:   \ set ghost-xt field by doing a search
  953:   dup >ghost-name count 
  954:   current-ghosts search-wordlist
  955:   0= ABORT" CROSS: Just created, must be there!"
  956:   over >ghost-xt !
  957:   DOES> 
  958:       dup executed-ghost !
  959:       >exec @ execute-exec ;
  960: 
  961: \ ghost words                                          14oct92py
  962: \                                          changed:    10may93py/jaw
  963: 
  964: Defer search-ghosts
  965: 
  966: : (search-ghosts) ( adr len -- cfa true | 0 )
  967:   current-ghosts search-wordlist ; 
  968: 
  969:   ' (search-ghosts) IS search-ghosts
  970: 
  971: : gsearch ( addr len -- ghost true | 0 )
  972:   search-ghosts
  973:   dup IF swap >body swap THEN ;
  974: 
  975: : gfind   ( string -- ghost true / string false )
  976: \ searches for string in word-list ghosts
  977:   \ dup count type space
  978:   dup >r count gsearch
  979:   dup IF rdrop ELSE r> swap THEN ;
  980: 
  981: : gdiscover ( xt -- ghost true | xt false )
  982:   >r ghost-list
  983:   BEGIN @ dup
  984:   WHILE dup >magic @ <fwd> <>
  985:         IF dup >link @ r@ =
  986:            IF rdrop true EXIT THEN
  987:         THEN
  988:   REPEAT
  989:   drop r> false ;
  990: 
  991: : xt>ghost ( xt -- ghost )
  992:   gdiscover 0= ABORT" CROSS: ghost not found for this xt" ;
  993: 
  994: : Ghost   ( "name" -- ghost )
  995:   >in @ bl word gfind IF  nip EXIT  THEN
  996:   drop  >in !  Make-Ghost ;
  997: 
  998: : >ghostname ( ghost -- adr len )
  999:   >ghost-name count ;
 1000: 
 1001: : forward? ( ghost -- flag )
 1002:   >magic @ <fwd> = ;
 1003: 
 1004: : undefined? ( ghost -- flag )
 1005:   >magic @ dup <fwd> = swap <skip> = or ;
 1006: 
 1007: : immediate? ( ghost -- flag )
 1008:   >magic @ <imm> = ;
 1009: 
 1010: Variable TWarnings
 1011: TWarnings on
 1012: Variable Exists-Warnings
 1013: Exists-Warnings on
 1014: 
 1015: : exists-warning ( ghost -- ghost )
 1016:   TWarnings @ Exists-Warnings @ and
 1017:   IF dup >ghostname warnhead type ."  exists " THEN ;
 1018: 
 1019: \ : HeaderGhost Ghost ;
 1020: 
 1021: Variable reuse-ghosts reuse-ghosts off
 1022: 
 1023: : HeaderGhost ( "name" -- ghost )
 1024:   >in @ 
 1025:   bl word count 
 1026: \  2dup type space
 1027:   current-ghosts search-wordlist
 1028:   IF  >body dup undefined? reuse-ghosts @ or
 1029:       IF   nip EXIT
 1030:       ELSE exists-warning 
 1031:       THEN
 1032:       drop >in ! 
 1033:   ELSE >in ! 
 1034:   THEN 
 1035:   \ we keep the execution semantics of the prviously
 1036:   \ defined words, this is a workaround
 1037:   \ for the redefined \ until vocs work
 1038:   Make-Ghost ;
 1039:  
 1040: : .ghost ( ghost -- ) >ghostname type ;
 1041: 
 1042: \ ' >ghostname ALIAS @name
 1043: 
 1044: : findghost ( "ghostname" -- ghost ) 
 1045:   bl word gfind 0= ABORT" CROSS: Ghost don't exists" ;
 1046: 
 1047: : [G'] ( -- ghost : name )
 1048: \G ticks a ghost and returns its address
 1049:   findghost
 1050:   state @ IF postpone literal THEN ; immediate
 1051: 
 1052: : g>xt ( ghost -- xt )
 1053: \G Returns the xt (cfa) of a ghost. Issues a warning if undefined.
 1054:   dup undefined? ABORT" CROSS: forward " >link @ ;
 1055:    
 1056: : g>body ( ghost -- body )
 1057: \G Returns the body-address (pfa) of a ghost. 
 1058: \G Issues a warning if undefined (a forward-reference).
 1059:   g>xt X >body ;
 1060: 
 1061: 1 Constant <label>
 1062: 
 1063: Struct
 1064:   \ bitmask of address type (not used for now)
 1065:   cell% field addr-type
 1066:   \ if this address is an xt, this field points to the ghost
 1067:   cell% field addr-xt-ghost
 1068:   \ a bit mask that tells as what part of the cell
 1069:   \ is refenced from an address pointer, used for assembler generation
 1070:   cell% field addr-refs
 1071: End-Struct addr-struct
 1072: 
 1073: : %allocerase ( align size -- addr )
 1074:   dup >r %alloc dup r> erase ;
 1075: 
 1076: \ returns the addr struct, define it if 0 reference
 1077: : define-addr-struct ( addr -- struct-addr )
 1078:   dup @ ?dup IF nip EXIT THEN
 1079:   addr-struct %allocerase tuck swap ! ;
 1080: 
 1081: >cross
 1082: 
 1083: \ Predefined ghosts                                    12dec92py
 1084: 
 1085: Ghost - drop \ need a ghost otherwise "-" would be treated as a number
 1086: 
 1087: Ghost 0=                                        drop
 1088: Ghost branch    Ghost ?branch                   2drop
 1089: Ghost unloop    Ghost ;S                        2drop
 1090: Ghost lit       Ghost !                         2drop
 1091: Ghost noop                                      drop
 1092: Ghost over      Ghost =         Ghost drop      2drop drop
 1093: Ghost 2drop drop
 1094: Ghost 2dup drop
 1095: Ghost call drop
 1096: Ghost @ drop
 1097: Ghost useraddr drop
 1098: Ghost execute drop
 1099: Ghost + drop
 1100: Ghost decimal drop
 1101: Ghost hex drop
 1102: Ghost lit@ drop
 1103: Ghost lit-perform drop
 1104: Ghost lit+ drop
 1105: Ghost does-exec drop
 1106: 
 1107: Ghost :docol    Ghost :doesjump Ghost :dodoes   2drop drop
 1108: Ghost :dovar					drop
 1109: 
 1110: \ \ Parameter for target systems                         06oct92py
 1111: 
 1112: 
 1113: \ we define it ans like...
 1114: wordlist Constant target-environment
 1115: 
 1116: \ save information of current dictionary to restore with environ>
 1117: Variable env-current 
 1118: 
 1119: : >ENVIRON get-current env-current ! target-environment set-current ;
 1120: : ENVIRON> env-current @ set-current ; 
 1121: 
 1122: >TARGET
 1123: 
 1124: : environment? ( addr len -- [ x ] true | false )
 1125: \G returns the content of environment variable and true or
 1126: \G false if not present
 1127:    target-environment search-wordlist 
 1128:    IF EXECUTE true ELSE false THEN ;
 1129: 
 1130: : $has? ( addr len -- x | false )
 1131: \G returns the content of environment variable 
 1132: \G or false if not present
 1133:    T environment? H dup IF drop THEN ;
 1134: 
 1135: : e? ( "name" -- x )
 1136: \G returns the content of environment variable. 
 1137: \G The variable is expected to exist. If not, issue an error.
 1138:    bl word count T environment? H 
 1139:    0= ABORT" environment variable not defined!" ;
 1140: 
 1141: : has? ( "name" --- x | false )
 1142: \G returns the content of environment variable 
 1143: \G or false if not present
 1144:    bl word count T $has? H ;
 1145: 
 1146: 
 1147: >ENVIRON get-order get-current swap 1+ set-order
 1148: true SetValue compiler
 1149: true SetValue cross
 1150: true SetValue standard-threading
 1151: >TARGET previous
 1152: 
 1153: 0
 1154: [IFDEF] mach-file drop mach-file count 1 [THEN]
 1155: [IFDEF] machine-file drop machine-file 1 [THEN]
 1156: [IF] 	included hex
 1157: [ELSE]  cr ." No machine description!" ABORT 
 1158: [THEN]
 1159: 
 1160: >ENVIRON
 1161: 
 1162: T has? ec H
 1163: [IF]
 1164: false DefaultValue relocate
 1165: false DefaultValue file
 1166: false DefaultValue OS
 1167: false DefaultValue prims
 1168: false DefaultValue floating
 1169: false DefaultValue glocals
 1170: false DefaultValue dcomps
 1171: false DefaultValue hash
 1172: false DefaultValue xconds
 1173: false DefaultValue header
 1174: false DefaultValue backtrace
 1175: false DefaultValue new-input
 1176: false DefaultValue peephole
 1177: false DefaultValue primcentric
 1178: false DefaultValue abranch
 1179: true DefaultValue f83headerstring
 1180: true DefaultValue control-rack
 1181: [THEN]
 1182: 
 1183: true DefaultValue gforthcross
 1184: true DefaultValue interpreter
 1185: true DefaultValue ITC
 1186: false DefaultValue rom
 1187: false DefaultValue flash
 1188: true DefaultValue standardthreading
 1189: 
 1190: \ ANSForth environment  stuff
 1191: 8 DefaultValue ADDRESS-UNIT-BITS
 1192: 255 DefaultValue MAX-CHAR
 1193: 255 DefaultValue /COUNTED-STRING
 1194: 
 1195: >TARGET
 1196: s" relocate" T environment? H 
 1197: \ JAW why set NIL to this?!
 1198: [IF]	drop \ SetValue NIL
 1199: [ELSE]	>ENVIRON X NIL SetValue relocate
 1200: [THEN]
 1201: >TARGET
 1202: 
 1203: 0 Constant NIL
 1204: 
 1205: >CROSS
 1206: 
 1207: \ \ Create additional parameters                         19jan95py
 1208: 
 1209: \ currently cross only works for host machines with address-unit-bits
 1210: \ eual to 8 because of s! and sc!
 1211: \ but I start to query the environment just to modularize a little bit
 1212: 
 1213: : check-address-unit-bits ( -- )	
 1214: \	s" ADDRESS-UNIT-BITS" environment?
 1215: \	IF 8 <> ELSE true THEN
 1216: \	ABORT" ADDRESS-UNIT-BITS unknown or not equal to 8!"
 1217: 
 1218: \	shit, this doesn't work because environment? is only defined for 
 1219: \	gforth.fi and not kernl???.fi
 1220: 	;
 1221: 
 1222: check-address-unit-bits
 1223: 8 Constant bits/byte	\ we define: byte is address-unit
 1224: 
 1225: 1 bits/byte lshift Constant maxbyte 
 1226: \ this sets byte size for the target machine, (probably right guess) jaw
 1227: 
 1228: T
 1229: NIL		   	Constant TNIL
 1230: cell               	Constant tcell
 1231: cell<<             	Constant tcell<<
 1232: cell>bit           	Constant tcell>bit
 1233: bits/char          	Constant tbits/char
 1234: bits/char H bits/byte T /      
 1235: 			Constant tchar
 1236: float             	Constant tfloat
 1237: 1 bits/char lshift 	Constant tmaxchar
 1238: [IFUNDEF] bits/byte
 1239: 8			Constant tbits/byte
 1240: [ELSE]
 1241: bits/byte		Constant tbits/byte
 1242: [THEN]
 1243: H
 1244: tbits/char bits/byte /	Constant tbyte
 1245: 
 1246: : >signed ( u -- n )
 1247:     1 tbits/char tcell * 1- lshift 2dup and
 1248:     IF  negate or  ELSE  drop  THEN ;
 1249: 
 1250: \ Variables                                            06oct92py
 1251: 
 1252: Variable (tlast)    
 1253: (tlast) Value tlast TNIL tlast !  \ Last name field
 1254: Variable tlastcfa \ Last code field
 1255: 
 1256: \ statistics						10jun97jaw
 1257: 
 1258: Variable headers-named 0 headers-named !
 1259: Variable user-vars 0 user-vars !
 1260: 
 1261: : target>bitmask-size ( u1 -- u2 )
 1262:   1- tcell>bit rshift 1+ ;
 1263: 
 1264: : allocatetarget ( size -- adr )
 1265:   dup allocate ABORT" CROSS: No memory for target"
 1266:   swap over swap erase ;
 1267: 
 1268: \ \ memregion.fs
 1269: 
 1270: 
 1271: Variable last-defined-region    \ pointer to last defined region
 1272: Variable region-link            \ linked list with all regions
 1273: Variable mirrored-link          \ linked list for mirrored regions
 1274: 0 dup mirrored-link ! region-link !
 1275: 
 1276: : >rname 9 cells + ;
 1277: : >rtouch 8 cells + ; \ executed when region is accessed
 1278: : >rbm   4 cells + ; \ bitfield per cell witch indicates relocation
 1279: : >rmem  5 cells + ;
 1280: : >rtype 6 cells + ; \ field per cell witch points to a type struct
 1281: : >rrom 7 cells + ;  \ a -1 indicates that this region is rom
 1282: : >rlink 3 cells + ;
 1283: : >rdp 2 cells + ;
 1284: : >rlen cell+ ;
 1285: : >rstart ;
 1286: 
 1287: : (region) ( addr len region -- )
 1288: \G change startaddress and length of an existing region
 1289:   >r r@ last-defined-region !
 1290:   r@ >rlen ! dup r@ >rstart ! r> >rdp ! ;
 1291: 
 1292: : uninitialized -1 ABORT" CROSS: Region is uninitialized" ;
 1293: 
 1294: : region ( addr len -- "name" )                
 1295: \G create a new region
 1296:   \ check whether predefined region exists 
 1297:   save-input bl word find >r >r restore-input throw r> r> 0= 
 1298:   IF	\ make region
 1299: 	drop
 1300: 	save-input create restore-input throw
 1301: 	here last-defined-region !
 1302: 	over ( startaddr ) , ( length ) , ( dp ) ,
 1303: 	region-link linked 0 , 0 , 0 , 0 , 
 1304:         ['] uninitialized ,
 1305:         bl word count string,
 1306:   ELSE	\ store new parameters in region
 1307:         bl word drop
 1308: 	>body (region)
 1309:   THEN ;
 1310: 
 1311: : borders ( region -- startaddr endaddr ) 
 1312: \G returns lower and upper region border
 1313:   dup >rstart @ swap >rlen @ over + ;
 1314: 
 1315: : extent  ( region -- startaddr len )   
 1316: \G returns the really used area
 1317:   dup >rstart @ swap >rdp @ over - ;
 1318: 
 1319: : area ( region -- startaddr totallen ) 
 1320: \G returns the total area
 1321:   dup >rstart @ swap >rlen @ ;
 1322: 
 1323: : dp@ ( region -- dp )
 1324:   >rdp @ ;
 1325: 
 1326: : mirrored ( -- )                              
 1327: \G mark last defined region as mirrored
 1328:   mirrored-link
 1329:   align linked last-defined-region @ , ;
 1330: 
 1331: : writeprotected
 1332: \G mark a region as write protected
 1333:   -1 last-defined-region @ >rrom ! ;
 1334: 
 1335: : .addr ( u -- )
 1336: \G prints a 16 or 32 Bit nice hex value
 1337:   base @ >r hex
 1338:   tcell 2 u>
 1339:   IF s>d <# # # # # [char] . hold # # # # #> type
 1340:   ELSE s>d <# # # # # # #> type
 1341:   THEN r> base ! space ;
 1342: 
 1343: : .regions                      \G display region statistic
 1344: 
 1345:   \ we want to list the regions in the right order
 1346:   \ so first collect all regions on stack
 1347:   0 region-link @
 1348:   BEGIN dup WHILE dup @ REPEAT drop
 1349:   BEGIN dup
 1350:   WHILE cr
 1351:         0 >rlink - >r
 1352:         r@ >rname count tuck type
 1353:         12 swap - 0 max spaces space
 1354:         ." Start: " r@ >rstart @ dup .addr space
 1355:         ." End: " r@ >rlen @ + .addr space
 1356:         ." DP: " r> >rdp @ .addr
 1357:   REPEAT drop
 1358:   s" rom" T $has? H 0= ?EXIT
 1359:   cr ." Mirrored:"
 1360:   mirrored-link @
 1361:   BEGIN dup
 1362:   WHILE space dup cell+ @ >rname count type @
 1363:   REPEAT drop cr
 1364:   ;
 1365: 
 1366: \ -------- predefined regions
 1367: 
 1368: 0 0 region address-space
 1369: \ total memory addressed and used by the target system
 1370: 
 1371: 0 0 region user-region
 1372: \ data for user variables goes here
 1373: \ this has to be defined before dictionary or ram-dictionary
 1374: 
 1375: 0 0 region dictionary
 1376: \ rom area for the compiler
 1377: 
 1378: T has? rom H
 1379: [IF]
 1380: 0 0 region ram-dictionary mirrored
 1381: \ ram area for the compiler
 1382: [ELSE]
 1383: ' dictionary ALIAS ram-dictionary
 1384: [THEN]
 1385: 
 1386: 0 0 region return-stack
 1387: 
 1388: 0 0 region data-stack
 1389: 
 1390: 0 0 region tib-region
 1391: 
 1392: ' dictionary ALIAS rom-dictionary
 1393: 
 1394: : setup-region ( region -- )
 1395:   >r
 1396:   \ allocate mem
 1397:   r@ >rlen @ allocatetarget
 1398:   r@ >rmem !
 1399: 
 1400:   r@ >rlen @
 1401:   target>bitmask-size allocatetarget
 1402:   r@ >rbm !
 1403: 
 1404:   r@ >rlen @
 1405:   tcell / 1+ cells allocatetarget r@ >rtype !
 1406: 
 1407:   ['] noop r@ >rtouch !
 1408:   rdrop ;
 1409: 
 1410: : setup-target ( -- )   \G initialize target's memory space
 1411:   s" rom" T $has? H
 1412:   IF  \ check for ram and rom...
 1413:       \ address-space area nip 0<>
 1414:       ram-dictionary area nip 0<>
 1415:       rom-dictionary area nip 0<>
 1416:       and 0=
 1417:       ABORT" CROSS: define address-space, rom- , ram-dictionary, with rom-support!"
 1418:   THEN
 1419:   address-space area nip
 1420:   IF
 1421:       address-space area
 1422:   ELSE
 1423:       dictionary area
 1424:   THEN
 1425:   nip 0=
 1426:   ABORT" CROSS: define at least address-space or dictionary!!"
 1427: 
 1428:   \ allocate target for each region
 1429:   region-link
 1430:   BEGIN @ dup
 1431:   WHILE dup
 1432:         0 >rlink - >r
 1433:         r@ >rlen @
 1434:         IF      r@ setup-region
 1435:         THEN    rdrop
 1436:    REPEAT drop ;
 1437: 
 1438: \ MakeKernel                                           		22feb99jaw
 1439: 
 1440: : makekernel ( start targetsize -- )
 1441: \G convenience word to setup the memory of the target
 1442: \G used by main.fs of the c-engine based systems
 1443:   dictionary (region) setup-target ;
 1444: 
 1445: >MINIMAL
 1446: : makekernel makekernel ;
 1447: >CROSS
 1448: 
 1449: \ \ switched tdp for rom support				03jun97jaw
 1450: 
 1451: \ second value is here to store some maximal value for statistics
 1452: \ tempdp is also embedded here but has nothing to do with rom support
 1453: \ (needs switched dp)
 1454: 
 1455: variable tempdp	0 ,	\ temporary dp for resolving
 1456: variable tempdp-save
 1457: 
 1458: 0 [IF]
 1459: variable romdp 0 ,      \ Dictionary-Pointer for ramarea
 1460: variable ramdp 0 ,      \ Dictionary-Pointer for romarea
 1461: 
 1462: \
 1463: variable sramdp		\ start of ram-area for forth
 1464: variable sromdp		\ start of rom-area for forth
 1465: 
 1466: [THEN]
 1467: 
 1468: 0 Value current-region
 1469: 0 Value tdp
 1470: Variable fixed		\ flag: true: no automatic switching
 1471: 			\	false: switching is done automatically
 1472: 
 1473: \ Switch-Policy:
 1474: \
 1475: \ a header is always compiled into rom
 1476: \ after a created word (create and variable) compilation goes to ram
 1477: \
 1478: \ Be careful: If you want to make the data behind create into rom
 1479: \ you have to put >rom before create!
 1480: 
 1481: variable constflag constflag off
 1482: 
 1483: : activate ( region -- )
 1484: \G next code goes to this region
 1485:   dup to current-region >rdp to tdp ;
 1486: 
 1487: : (switchram)
 1488:   fixed @ ?EXIT s" rom" T $has? H 0= ?EXIT
 1489:   ram-dictionary activate ;
 1490: 
 1491: : switchram
 1492:   constflag @
 1493:   IF constflag off ELSE (switchram) THEN ;
 1494: 
 1495: : switchrom
 1496:   fixed @ ?EXIT rom-dictionary activate ;
 1497: 
 1498: : >tempdp ( addr -- ) 
 1499:   tdp tempdp-save ! tempdp to tdp tdp ! ;
 1500: : tempdp> ( -- )
 1501:   tempdp-save @ to tdp ;
 1502: 
 1503: : >ram  fixed off (switchram) fixed on ;
 1504: : >rom  fixed off switchrom fixed on ;
 1505: : >auto fixed off switchrom ;
 1506: 
 1507: 
 1508: 
 1509: \ : romstart dup sromdp ! romdp ! ;
 1510: \ : ramstart dup sramdp ! ramdp ! ;
 1511: 
 1512: \ default compilation goes to rom
 1513: \ when romable support is off, only the rom switch is used (!!)
 1514: >auto
 1515: 
 1516: : there  tdp @ ;
 1517: 
 1518: >TARGET
 1519: 
 1520: \ \ Target Memory Handling
 1521: 
 1522: \ Byte ordering and cell size                          06oct92py
 1523: 
 1524: : cell+         tcell + ;
 1525: : cells         tcell<< lshift ;
 1526: : chars         tchar * ;
 1527: : char+		tchar + ;
 1528: : floats	tfloat * ;
 1529:     
 1530: >CROSS
 1531: : cell/         tcell<< rshift ;
 1532: >TARGET
 1533: 20 CONSTANT bl
 1534: \ TNIL Constant NIL
 1535: 
 1536: >CROSS
 1537: 
 1538: bigendian
 1539: [IF]
 1540:    : DS!  ( d addr -- )  tcell bounds swap 1-
 1541:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
 1542:    : DS@  ( addr -- d )  >r 0 0 r> tcell bounds
 1543:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP ;
 1544:    : Sc!  ( n addr -- )  >r s>d r> tchar bounds swap 1-
 1545:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
 1546:    : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds
 1547:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
 1548: [ELSE]
 1549:    : DS!  ( d addr -- )  tcell bounds
 1550:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
 1551:    : DS@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
 1552:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP ;
 1553:    : Sc!  ( n addr -- )  >r s>d r> tchar bounds
 1554:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
 1555:    : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds swap 1-
 1556:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
 1557: [THEN]
 1558: 
 1559: : S! ( n addr -- ) >r s>d r> DS! ;
 1560: : S@ ( addr -- n ) DS@ d>s ;
 1561: 
 1562: : taddr>region ( taddr -- region | 0 )
 1563: \G finds for a target-address the correct region
 1564: \G returns 0 if taddr is not in range of a target memory region
 1565:   region-link
 1566:   BEGIN @ dup
 1567:   WHILE dup >r
 1568:         0 >rlink - >r
 1569:         r@ >rlen @
 1570:         IF      dup r@ borders within
 1571:                 IF r> r> drop nip 
 1572:                    dup >rtouch @ EXECUTE EXIT 
 1573:                 THEN
 1574:         THEN
 1575:         r> drop
 1576:         r>
 1577:   REPEAT
 1578:   2drop 0 ;
 1579: 
 1580: : taddr>region-abort ( taddr -- region | 0 )
 1581: \G Same as taddr>region but aborts if taddr is not
 1582: \G a valid address in the target address space
 1583:   dup taddr>region dup 0= 
 1584:   IF    drop cr ." Wrong address: " .addr
 1585:         -1 ABORT" Address out of range!"
 1586:   THEN nip ;
 1587: 
 1588: : (>regionimage) ( taddr -- 'taddr )
 1589:   dup
 1590:   \ find region we want to address
 1591:   taddr>region-abort
 1592:   >r
 1593:   \ calculate offset in region
 1594:   r@ >rstart @ -
 1595:   \ add regions real address in our memory
 1596:   r> >rmem @ + ;
 1597: 
 1598: : (>regionramimage) ( taddr -- 'taddr )
 1599: \G same as (>regionimage) but aborts if the region is rom
 1600:   dup
 1601:   \ find region we want to address
 1602:   taddr>region-abort
 1603:   >r
 1604:   r@ >rrom @ ABORT" CROSS: region is write-protected!"
 1605:   \ calculate offset in region
 1606:   r@ >rstart @ -
 1607:   \ add regions real address in our memory
 1608:   r> >rmem @ + ;
 1609: 
 1610: : (>regionbm) ( taddr -- 'taddr bitmaskbaseaddr )
 1611:   dup
 1612:   \ find region we want to address
 1613:   taddr>region-abort
 1614:   >r
 1615:   \ calculate offset in region
 1616:   r@ >rstart @ -
 1617:   \ add regions real address in our memory
 1618:   r> >rbm @ ;
 1619: 
 1620: : (>regiontype) ( taddr -- 'taddr )
 1621:   dup
 1622:   \ find region we want to address
 1623:   taddr>region-abort
 1624:   >r
 1625:   \ calculate offset in region
 1626:   r@ >rstart @ - tcell / cells
 1627:   \ add regions real address in our memory
 1628:   r> >rtype @ + ;
 1629:   
 1630: \ Bit string manipulation                               06oct92py
 1631: \                                                       9may93jaw
 1632: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
 1633: : bits ( n -- n ) chars Bittable + c@ ;
 1634: 
 1635: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
 1636: : +bit ( addr n -- )  >bit over c@ or swap c! ;
 1637: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
 1638: 
 1639: : @relbit ( taddr -- f ) (>regionbm) swap cell/ >bit swap c@ and ;
 1640: 
 1641: : (relon) ( taddr -- )  
 1642:   [ [IFDEF] fd-relocation-table ]
 1643:   s" +" fd-relocation-table write-file throw
 1644:   dup s>d <# #s #> fd-relocation-table write-line throw
 1645:   [ [THEN] ]
 1646:   (>regionbm) swap cell/ +bit ;
 1647: 
 1648: : (reloff) ( taddr -- ) 
 1649:   [ [IFDEF] fd-relocation-table ]
 1650:   s" -" fd-relocation-table write-file throw
 1651:   dup s>d <# #s #> fd-relocation-table write-line throw
 1652:   [ [THEN] ]
 1653:   (>regionbm) swap cell/ -bit ;
 1654: 
 1655: DEFER >image
 1656: DEFER >ramimage
 1657: DEFER relon
 1658: DEFER reloff
 1659: DEFER correcter
 1660: 
 1661: T has? relocate H
 1662: [IF]
 1663: ' (relon) IS relon
 1664: ' (reloff) IS reloff
 1665: ' (>regionimage) IS >image
 1666: ' (>regionimage) IS >ramimage
 1667: [ELSE]
 1668: ' drop IS relon
 1669: ' drop IS reloff
 1670: ' (>regionimage) IS >image
 1671: ' (>regionimage) IS >ramimage
 1672: [THEN]
 1673: 
 1674: : enforce-writeprotection ( -- )
 1675:   ['] (>regionramimage) IS >ramimage ;
 1676: 
 1677: : relax-writeprotection ( -- )
 1678:   ['] (>regionimage) IS >ramimage ;
 1679: 
 1680: : writeprotection-relaxed? ( -- )
 1681:   ['] >ramimage >body @ ['] (>regionimage) = ;
 1682: 
 1683: \ Target memory access                                 06oct92py
 1684: 
 1685: : align+  ( taddr -- rest )
 1686:     tcell tuck 1- and - [ tcell 1- ] Literal and ;
 1687: : cfalign+  ( taddr -- rest )
 1688:     \ see kernel.fs:cfaligned
 1689:     /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;
 1690: 
 1691: >TARGET
 1692: : aligned ( taddr -- ta-addr )  dup align+ + ;
 1693: \ assumes cell alignment granularity (as GNU C)
 1694: 
 1695: : cfaligned ( taddr1 -- taddr2 )
 1696:     \ see kernel.fs
 1697:     dup cfalign+ + ;
 1698: 
 1699: : @  ( taddr -- w )     >image S@ ;
 1700: : !  ( w taddr -- )     >ramimage S! ;
 1701: : c@ ( taddr -- char )  >image Sc@ ;
 1702: : c! ( char taddr -- )  >ramimage Sc! ;
 1703: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
 1704: : 2! ( x1 x2 taddr -- ) T tuck ! cell+ ! H ;
 1705: 
 1706: \ Target compilation primitives                        06oct92py
 1707: \ included A!                                          16may93jaw
 1708: 
 1709: : here  ( -- there )    there ;
 1710: : allot ( n -- )        tdp +! ;
 1711: : ,     ( w -- )        T here H tcell T allot  ! H ;
 1712: : c,    ( char -- )     T here H tchar T allot c! H ;
 1713: : align ( -- )          T here H align+ 0 ?DO  bl T c, H tchar +LOOP ;
 1714: : cfalign ( -- )
 1715:     T here H cfalign+ 0 ?DO  bl T c, H tchar +LOOP ;
 1716: 
 1717: : >address		dup 0>= IF tbyte / THEN ; \ ?? jaw 
 1718: : A!                    swap >address swap dup relon T ! H ;
 1719: : A,    ( w -- )        >address T here H relon T , H ;
 1720: 
 1721: \ high-level ghosts
 1722: 
 1723: >CROSS
 1724: 
 1725: Ghost (do)      Ghost (?do)                     2drop
 1726: Ghost (for)                                     drop
 1727: Ghost (loop)    Ghost (+loop)                   2drop
 1728: Ghost (next)                                    drop
 1729: Ghost (does>)   Ghost (does>1)  Ghost (does>2)  2drop drop
 1730: Ghost compile,                                  drop
 1731: Ghost (.")      Ghost (S")      Ghost (ABORT")  2drop drop
 1732: Ghost (C")      Ghost c(abort") Ghost type      2drop drop
 1733: Ghost '                                         drop
 1734: 
 1735: \ user ghosts
 1736: 
 1737: Ghost state drop
 1738: 
 1739: \ \ --------------------        Host/Target copy etc.     	29aug01jaw
 1740: 
 1741: 
 1742: >CROSS
 1743: 
 1744: : TD! >image DS! ;
 1745: : TD@ >image DS@ ;
 1746: 
 1747: : th-count ( taddr -- host-addr len )
 1748: \G returns host address of target string
 1749:   assert1( tbyte 1 = )
 1750:   dup X c@ swap X char+ >image swap ;
 1751: 
 1752: : ht-move ( haddr taddr len -- )
 1753: \G moves data from host-addr to destination in target-addr
 1754: \G character by character
 1755:   swap -rot bounds ?DO I c@ over X c! X char+ LOOP drop ;
 1756: 
 1757: 2Variable last-string
 1758: X has? rom [IF] $60 [ELSE] $00 [THEN] Constant header-masks
 1759: 
 1760: : ht-header,  ( addr count -- )
 1761:   dup there swap last-string 2!
 1762:     dup header-masks or T c, H bounds  ?DO  I c@ T c, H  LOOP ;
 1763: : ht-string,  ( addr count -- )
 1764:   dup there swap last-string 2!
 1765:     dup T c, H bounds  ?DO  I c@ T c, H  LOOP ;
 1766: : ht-mem, ( addr count )
 1767:     bounds ?DO  I c@  T c, H  LOOP ;
 1768: 
 1769: >TARGET
 1770: 
 1771: : count dup X c@ swap X char+ swap ;
 1772: 
 1773: : on		>r -1 -1 r> TD!  ; 
 1774: : off   	T 0 swap ! H ;
 1775: 
 1776: : tcmove ( source dest len -- )
 1777: \G cmove in target memory
 1778:   tchar * bounds
 1779:   ?DO  dup T c@ H I T c! H 1+
 1780:   tchar +LOOP  drop ;
 1781: 
 1782: : tcallot ( char size -- )
 1783:     0 ?DO  dup T c, H  tchar +LOOP  drop ;
 1784: 
 1785: : td, ( d -- )
 1786: \G Store a host value as one cell into the target
 1787:   there tcell X allot TD! ;
 1788: 
 1789: \ \ Load Assembler
 1790: 
 1791: >TARGET
 1792: H also Forth definitions
 1793: 
 1794: \ FIXME: should we include the assembler really in the forth 
 1795: \ dictionary?!?!?!? This conflicts with the existing assembler 
 1796: \ of the host forth system!!
 1797: [IFDEF] asm-include asm-include [THEN] hex
 1798: 
 1799: previous
 1800: 
 1801: 
 1802: >CROSS
 1803: 
 1804: : (cc) T a, H ;					' (cc) plugin-of colon,
 1805: : (prim) T a, H ;				' (prim) plugin-of prim,
 1806: 
 1807: : (cr) >tempdp colon, tempdp> ;                 ' (cr) plugin-of colon-resolve
 1808: : (ar) T ! H ;					' (ar) plugin-of addr-resolve
 1809: : (dr)  ( ghost res-pnt target-addr addr )
 1810: 	>tempdp drop over 
 1811: 	dup >magic @ <do:> =
 1812: 	IF 	doer,
 1813: 	ELSE	dodoes,
 1814: 	THEN 
 1815: 	tempdp> ;				' (dr) plugin-of doer-resolve
 1816: 
 1817: : (cm) ( -- addr )
 1818:     there -1 colon, ;				' (cm) plugin-of colonmark,
 1819: 
 1820: >TARGET
 1821: : compile, ( xt -- )
 1822:   dup xt>ghost >comp @ EXECUTE ;
 1823: >CROSS
 1824: 
 1825: \ resolve structure
 1826: 
 1827: : >next ;		\ link to next field
 1828: : >tag cell+ ;		\ indecates type of reference: 0: call, 1: address, 2: doer
 1829: : >taddr cell+ cell+ ;	
 1830: : >ghost 3 cells + ;
 1831: : >file 4 cells + ;
 1832: : >line 5 cells + ;
 1833: 
 1834: : (refered) ( ghost addr tag -- )
 1835: \G creates a reference to ghost at address taddr
 1836:     >space
 1837:     rot >link linked
 1838:     ( taddr tag ) ,
 1839:     ( taddr ) , 
 1840:     last-header-ghost @ , 
 1841:     loadfile , 
 1842:     sourceline# , 
 1843:     space>
 1844: ;
 1845: 
 1846: : refered ( ghost tag -- )
 1847: \G creates a resolve structure
 1848:     T here aligned H swap (refered)
 1849:   ;
 1850: 
 1851: : killref ( addr ghost -- )
 1852: \G kills a forward reference to ghost at position addr
 1853: \G this is used to eleminate a :dovar refence after making a DOES>
 1854:     dup >magic @ <fwd> <> IF 2drop EXIT THEN
 1855:     swap >r >link
 1856:     BEGIN dup @ dup  ( addr last this )
 1857:     WHILE dup >taddr @ r@ =
 1858:  	 IF   @ over !
 1859: 	 ELSE nip THEN
 1860:     REPEAT rdrop 2drop 
 1861:   ;
 1862: 
 1863: Defer resolve-warning
 1864: 
 1865: : reswarn-test ( ghost res-struct -- ghost res-struct )
 1866:   over cr ." Resolving " .ghost dup ."  in " >ghost @ .ghost ;
 1867: 
 1868: : reswarn-forward ( ghost res-struct -- ghost res-struct )
 1869:   over warnhead .ghost dup ."  is referenced in " 
 1870:   >ghost @ .ghost ;
 1871: 
 1872: \ ' reswarn-test IS resolve-warning
 1873:  
 1874: \ resolve                                              14oct92py
 1875: 
 1876:  : resolve-loop ( ghost resolve-list tcfa -- )
 1877:     >r
 1878:     BEGIN dup WHILE 
 1879: \  	  dup >tag @ 2 = IF reswarn-forward THEN
 1880: 	  resolve-warning 
 1881: 	  r@ over >taddr @ 
 1882: 	  2 pick >tag @
 1883: 	  CASE	0 OF colon-resolve ENDOF
 1884: 		1 OF addr-resolve ENDOF
 1885: 		2 OF doer-resolve ENDOF
 1886: 	  ENDCASE
 1887: 	  @ \ next list element
 1888:     REPEAT 2drop rdrop 
 1889:   ;
 1890: 
 1891: \ : resolve-loop ( ghost tcfa -- ghost tcfa )
 1892: \  >r dup >link @
 1893: \  BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
 1894: 
 1895: \ exists                                                9may93jaw
 1896: 
 1897: : exists ( ghost tcfa -- )
 1898: \G print warning and set new target link in ghost
 1899:   swap exists-warning
 1900:   >link ! ;
 1901: 
 1902: : colon-resolved   ( ghost -- )
 1903: \ compiles a call to a colon definition,
 1904: \ compile action for >comp field
 1905:     >link @ colon, ; 
 1906: 
 1907: : prim-resolved  ( ghost -- )
 1908: \ compiles a call to a primitive
 1909:     >link @ prim, ;
 1910: 
 1911: : (is-forward)   ( ghost -- )
 1912:     colonmark, 0 (refered) ; \ compile space for call
 1913: ' (is-forward) IS is-forward
 1914: 
 1915: 0 Value resolved
 1916: 
 1917: : resolve-forward-references ( ghost resolve-list -- )
 1918:     \ loop through forward referencies
 1919:     comp-state @ >r Resolving comp-state !
 1920:     over >link @ resolve-loop 
 1921:     r> comp-state !
 1922: 
 1923:     ['] noop IS resolve-warning ;
 1924: 
 1925: 
 1926: : (resolve) ( ghost tcfa -- ghost resolve-list )
 1927:     \ check for a valid address, it is a primitive reference
 1928:     \ otherwise
 1929:     dup taddr>region 0<> IF
 1930:       \ define this address in the region address type table
 1931:       2dup (>regiontype) define-addr-struct addr-xt-ghost 
 1932:       \ we define new address only if empty
 1933:       \ this is for not to take over the alias ghost
 1934:       \ (different ghost, but identical xt)
 1935:       \ but the very first that really defines it
 1936:       dup @ 0= IF ! ELSE 2drop THEN
 1937:     THEN
 1938:     swap >r
 1939:     r@ to resolved
 1940: 
 1941: \    r@ >comp @ ['] is-forward =
 1942: \    ABORT" >comp action not set on a resolved ghost"
 1943: 
 1944:     \ copmile action defaults to colon-resolved
 1945:     \ if this is not right something must be set before
 1946:     \ calling resolve
 1947:     r@ >comp @ ['] is-forward = IF
 1948:        ['] colon-resolved r@ >comp !
 1949:    THEN
 1950:     r@ >link @ swap \ ( list tcfa R: ghost )
 1951:     \ mark ghost as resolved
 1952:     r@ >link ! <res> r@ >magic !
 1953:     r> swap ;
 1954: 
 1955: : resolve  ( ghost tcfa -- )
 1956: \G resolve referencies to ghost with tcfa
 1957:     \ is ghost resolved?, second resolve means another 
 1958:     \ definition with the same name
 1959:     over undefined? 0= IF  exists EXIT THEN
 1960:     (resolve)
 1961:     ( ghost resolve-list )
 1962:     resolve-forward-references ;
 1963: 
 1964: : resolve-noforwards ( ghost tcfa -- )
 1965: \G Same as resolve but complain if there are any
 1966: \G forward references on this ghost
 1967:    \ is ghost resolved?, second resolve means another 
 1968:    \ definition with the same name
 1969:    over undefined? 0= IF  exists EXIT THEN
 1970:    (resolve)
 1971:    IF cr ." No forward references allowed on: " .ghost cr
 1972:       -1 ABORT" Illegal forward reference"
 1973:    THEN
 1974:    drop ;
 1975: 
 1976: \ gexecute ghost,                                      01nov92py
 1977: 
 1978: : (gexecute)   ( ghost -- )
 1979:   dup >comp @ EXECUTE ;
 1980: 
 1981: : gexecute ( ghost -- )
 1982:   dup >magic @ <imm> = ABORT" CROSS: gexecute on immediate word"
 1983:   (gexecute) ;
 1984: 
 1985: : addr,  ( ghost -- )
 1986:   dup forward? IF  1 refered 0 T a, H ELSE >link @ T a, H THEN ;
 1987: 
 1988: \ .unresolved                                          11may93jaw
 1989: 
 1990: variable ResolveFlag
 1991: 
 1992: \ ?touched                                             11may93jaw
 1993: 
 1994: : ?touched ( ghost -- flag ) dup forward? swap >link @
 1995:                                0 <> and ;
 1996: 
 1997: : .forwarddefs ( ghost -- )
 1998:   ."  appeared in:"
 1999:   >link
 2000:   BEGIN	@ dup
 2001:   WHILE	cr 5 spaces
 2002: 	dup >ghost @ .ghost
 2003: 	."  file " dup >file @ ?dup IF count type ELSE ." CON" THEN
 2004: 	."  line " dup >line @ .dec
 2005:   REPEAT 
 2006:   drop ;
 2007: 
 2008: : ?resolved  ( ghost -- )
 2009:   dup ?touched
 2010:   IF  	ResolveFlag on 
 2011: 	dup cr .ghost .forwarddefs
 2012:   ELSE 	drop 
 2013:   THEN ;
 2014: 
 2015: : .unresolved  ( -- )
 2016:   ResolveFlag off cr ." Unresolved: "
 2017:   ghost-list
 2018:   BEGIN @ dup
 2019:   WHILE dup ?resolved
 2020:   REPEAT drop ResolveFlag @
 2021:   IF
 2022:       -1 abort" Unresolved words!"
 2023:   ELSE
 2024:       ." Nothing!"
 2025:   THEN
 2026:   cr ;
 2027: 
 2028: : .stats
 2029:   base @ >r decimal
 2030:   cr ." named Headers: " headers-named @ . 
 2031:   r> base ! ;
 2032: 
 2033: >MINIMAL
 2034: 
 2035: : .unresolved .unresolved ;
 2036: 
 2037: >CROSS
 2038: \ Header states                                        12dec92py
 2039: 
 2040: \ : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
 2041: X has? f83headerstring bigendian or [IF] 0 [ELSE] tcell 1- [THEN] Constant flag+
 2042: : flag! ( w -- )   tlast @ flag+ + dup >r T c@ xor r> c! H ;
 2043: 
 2044: VARIABLE ^imm
 2045: 
 2046: \ !! should be target wordsize specific
 2047: $80 constant alias-mask
 2048: $40 constant immediate-mask
 2049: $20 constant restrict-mask
 2050: 
 2051: >TARGET
 2052: : immediate     immediate-mask flag!
 2053:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
 2054:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
 2055:                 <imm> ^imm @ ! ;
 2056: : restrict      restrict-mask flag! ;
 2057: 
 2058: : isdoer	
 2059: \G define a forth word as doer, this makes obviously only sence on
 2060: \G forth processors such as the PSC1000
 2061: 		<do:> last-header-ghost @ >magic ! ;
 2062: >CROSS
 2063: 
 2064: \ Target Header Creation                               01nov92py
 2065: 
 2066: : ht-lstring, ( addr count -- )
 2067:   dup T , H bounds  ?DO  I c@ T c, H  LOOP ;
 2068: 
 2069: >TARGET
 2070: X has? f83headerstring [IF]
 2071: : name,  ( "name" -- )  bl word count ht-header, X cfalign ;
 2072: [ELSE]
 2073: : name,  ( "name" -- )  bl word count ht-lstring, X cfalign ;
 2074: [THEN]
 2075: : view,   ( -- ) ( dummy ) ;
 2076: >CROSS
 2077: 
 2078: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
 2079: 
 2080: s" ./doc/crossdoc.fd" r/w create-file throw value doc-file-id
 2081: \ contains the file-id of the documentation file
 2082: 
 2083: : T-\G ( -- )
 2084:     source >in @ /string doc-file-id write-line throw
 2085:     postpone \ ;
 2086: 
 2087: Variable to-doc  to-doc on
 2088: 
 2089: : cross-doc-entry  ( -- )
 2090:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
 2091:     IF
 2092: 	s" " doc-file-id write-line throw
 2093: 	s" make-doc " doc-file-id write-file throw
 2094: 
 2095: 	Last-Header-Ghost @ >ghostname doc-file-id write-file throw
 2096: 	>in @
 2097: 	[char] ( parse 2drop
 2098: 	[char] ) parse doc-file-id write-file throw
 2099: 	s"  )" doc-file-id write-file throw
 2100: 	[char] \ parse 2drop					
 2101: 	T-\G
 2102: 	>in !
 2103:     THEN ;
 2104: 
 2105: \ Target TAGS creation
 2106: 
 2107: s" kernel.TAGS" r/w create-file throw value tag-file-id
 2108: s" kernel.tags" r/w create-file throw value vi-tag-file-id
 2109: \ contains the file-id of the tags file
 2110: 
 2111: Create tag-beg 1 c,  7F c,
 2112: Create tag-end 1 c,  01 c,
 2113: Create tag-bof 1 c,  0C c,
 2114: Create tag-tab 1 c,  09 c,
 2115: 
 2116: 2variable last-loadfilename 0 0 last-loadfilename 2!
 2117: 	    
 2118: : put-load-file-name ( -- )
 2119:     sourcefilename last-loadfilename 2@ d<>
 2120:     IF
 2121: 	tag-bof count tag-file-id write-line throw
 2122: 	sourcefilename 2dup
 2123: 	tag-file-id write-file throw
 2124: 	last-loadfilename 2!
 2125: 	s" ,0" tag-file-id write-line throw
 2126:     THEN ;
 2127: 
 2128: : cross-gnu-tag-entry  ( -- )
 2129:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
 2130:     IF
 2131: 	put-load-file-name
 2132: 	source >in @ min tag-file-id write-file throw
 2133: 	tag-beg count tag-file-id write-file throw
 2134: 	Last-Header-Ghost @ >ghostname tag-file-id write-file throw
 2135: 	tag-end count tag-file-id write-file throw
 2136: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
 2137: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
 2138: 	s" ,0" tag-file-id write-line throw
 2139: 	base !
 2140:     THEN ;
 2141: 
 2142: : cross-vi-tag-entry ( -- )
 2143:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
 2144:     IF
 2145: 	sourcefilename vi-tag-file-id write-file throw
 2146: 	tag-tab count vi-tag-file-id write-file throw
 2147: 	Last-Header-Ghost @ >ghostname vi-tag-file-id write-file throw
 2148: 	tag-tab count vi-tag-file-id write-file throw
 2149: 	s" /^" vi-tag-file-id write-file throw
 2150: 	source vi-tag-file-id write-file throw
 2151: 	s" $/" vi-tag-file-id write-line throw
 2152:     THEN ;
 2153: 
 2154: : cross-tag-entry ( -- )
 2155:     cross-gnu-tag-entry
 2156:     cross-vi-tag-entry ;
 2157: 
 2158: \ Check for words
 2159: 
 2160: Defer skip? ' false IS skip?
 2161: 
 2162: : skipdef ( "name" -- )
 2163: \G skip definition of an undefined word in undef-words and
 2164: \G all-words mode
 2165:     Ghost dup forward?
 2166:     IF  >magic <skip> swap !
 2167:     ELSE drop THEN ;
 2168: 
 2169: : tdefined? ( "name" -- flag ) 
 2170:     Ghost undefined? 0= ;
 2171: 
 2172: : defined2? ( "name" -- flag ) 
 2173: \G return true for anything else than forward, even for <skip>
 2174: \G that's what we want
 2175:     Ghost forward? 0= ;
 2176: 
 2177: : forced? ( "name" -- flag )
 2178: \G return ture if it is a foreced skip with defskip
 2179:     Ghost >magic @ <skip> = ;
 2180: 
 2181: : needed? ( -- flag ) \ name
 2182: \G returns a false flag when
 2183: \G a word is not defined
 2184: \G a forward reference exists
 2185: \G so the definition is not skipped!
 2186:     bl word gfind
 2187:     IF dup undefined?
 2188: 	nip
 2189: 	0=
 2190:     ELSE  drop true  THEN ;
 2191: 
 2192: : doer? ( "name" -- 0 | addr ) \ name
 2193:     Ghost dup >magic @ <do:> = 
 2194:     IF >link @ ELSE drop 0 THEN ;
 2195: 
 2196: : skip-defs ( -- )
 2197:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
 2198: 
 2199: \ Target header creation
 2200: 
 2201: Variable NoHeaderFlag
 2202: NoHeaderFlag off
 2203: 
 2204: : 0.r ( n1 n2 -- ) 
 2205:     base @ >r hex 
 2206:     0 swap <# 0 ?DO # LOOP #> type 
 2207:     r> base ! ;
 2208: 
 2209: : .sym ( adr len -- )
 2210: \G escapes / and \ to produce sed output
 2211:   bounds 
 2212:   DO I c@ dup
 2213: 	CASE	[char] / OF drop ." \/" ENDOF
 2214: 		[char] \ OF drop ." \\" ENDOF
 2215: 		dup OF emit ENDOF
 2216: 	ENDCASE
 2217:     LOOP ;
 2218: 
 2219: Defer setup-execution-semantics  ' noop IS setup-execution-semantics
 2220: 0 Value lastghost
 2221: 
 2222: : (THeader ( "name" -- ghost )
 2223:     \  >in @ bl word count type 2 spaces >in !
 2224:     \ wordheaders will always be compiled to rom
 2225:     switchrom
 2226:     \ build header in target
 2227:     NoHeaderFlag @
 2228:     IF  NoHeaderFlag off
 2229:     ELSE
 2230: 	T align H view,
 2231: 	tlast @ dup 0> IF tcell - THEN T A, H  there tlast !
 2232: 	1 headers-named +!	\ Statistic
 2233: 	>in @ T name, H >in !
 2234:     THEN
 2235:     T cfalign here H tlastcfa !
 2236:     \ Old Symbol table sed-script
 2237: \    >in @ cr ." sym:s/CFA=" there 4 0.r ." /"  bl word count .sym ." /g" cr >in !
 2238:     HeaderGhost
 2239:     \ output symbol table to extra file
 2240:     dup >ghostname there symentry
 2241:     dup Last-Header-Ghost ! dup to lastghost
 2242:     dup >magic ^imm !     \ a pointer for immediate
 2243:     alias-mask flag!
 2244:     cross-doc-entry cross-tag-entry 
 2245:     setup-execution-semantics
 2246:     ;
 2247: 
 2248: \ this is the resolver information from ":"
 2249: \ resolving is done by ";"
 2250: Variable ;Resolve 1 cells allot
 2251: 
 2252: : hereresolve ( ghost -- )
 2253:   there resolve 0 ;Resolve ! ;
 2254: 
 2255: : Theader  ( "name" -- ghost )
 2256:   (THeader dup hereresolve ;
 2257: 
 2258: Variable aprim-nr -20 aprim-nr !
 2259: 
 2260: : copy-execution-semantics ( ghost-from ghost-dest -- )
 2261:   >r
 2262:   dup >exec @ r@ >exec !
 2263:   dup >comp @ r@ >comp !
 2264:   dup >exec2 @ r@ >exec2 !
 2265:   dup >exec-compile @ r@ >exec-compile !
 2266:   dup >ghost-xt @ r@ >ghost-xt !
 2267:   dup >created @ r@ >created !
 2268:   rdrop drop ;
 2269: 
 2270: >TARGET
 2271: 
 2272: : Alias    ( cfa -- ) \ name
 2273:   >in @ skip? IF  2drop  EXIT  THEN  >in !
 2274:   (THeader ( S xt ghost )
 2275:   2dup swap xt>ghost swap copy-execution-semantics
 2276:   over resolve T A, H alias-mask flag! ;
 2277: 
 2278: Variable last-prim-ghost
 2279: 0 last-prim-ghost !
 2280: 
 2281: : asmprimname, ( ghost -- : name ) 
 2282:   dup last-prim-ghost !
 2283:   >r
 2284:   here bl word count string, r@ >asm-name !
 2285:   aprim-nr @ r> >asm-dummyaddr ! ;
 2286: 
 2287: Defer setup-prim-semantics
 2288: 
 2289: : mapprim   ( "forthname" "asmlabel" -- ) 
 2290:   THeader -1 aprim-nr +! aprim-nr @ T A, H
 2291:   asmprimname, 
 2292:   setup-prim-semantics ;
 2293: 
 2294: : mapprim:   ( "forthname" "asmlabel" -- ) 
 2295:   -1 aprim-nr +! aprim-nr @
 2296:   Ghost tuck swap resolve-noforwards <do:> swap tuck >magic !
 2297:   asmprimname, ;
 2298: 
 2299: : Doer:   ( cfa -- ) \ name
 2300:   >in @ skip? IF  2drop  EXIT  THEN  >in !
 2301:   dup 0< s" prims" T $has? H 0= and
 2302:   IF
 2303:       .sourcepos ." needs doer: " >in @ bl word count type >in ! cr
 2304:   THEN
 2305:   Ghost
 2306:   tuck swap resolve-noforwards <do:> swap >magic ! ;
 2307: 
 2308: Variable prim#
 2309: : first-primitive ( n -- )  prim# ! ;
 2310: : group 0 word drop prim# @ 1- -$200 and prim# ! ;
 2311: : groupadd  ( n -- )  drop ;
 2312: : Primitive  ( -- ) \ name
 2313:   >in @ skip? IF  drop  EXIT  THEN  >in !
 2314:   s" prims" T $has? H 0=
 2315:   IF
 2316:      .sourcepos ." needs prim: " >in @ bl word count type >in ! cr
 2317:   THEN
 2318:   prim# @ (THeader ( S xt ghost )
 2319:   ['] prim-resolved over >comp !
 2320:   dup >ghost-flags <primitive> set-flag
 2321:   s" EC" T $has? H 0=
 2322:   IF
 2323:       over resolve-noforwards T A, H
 2324:       alias-mask flag!
 2325:   ELSE
 2326:       T here H resolve-noforwards T A, H
 2327:   THEN
 2328:   -1 prim# +! ;
 2329: >CROSS
 2330: 
 2331: \ Conditionals and Comments                            11may93jaw
 2332: 
 2333: \G saves the existing cond action, this is used for redefining in
 2334: \G instant
 2335: Variable cond-xt-old
 2336: 
 2337: : cond-target ( -- )
 2338: \G Compiles semantic of redefined cond into new one
 2339:   cond-xt-old @ compile, ; immediate restrict
 2340: 
 2341: : ;Cond
 2342:   postpone ;
 2343:   swap ! ;  immediate
 2344: 
 2345: : Cond: ( "name" -- ) 
 2346: \g defines a conditional or another word that must
 2347: \g be executed directly while compiling
 2348: \g these words have no interpretative semantics by default
 2349:   Ghost
 2350:   >exec-compile
 2351:   dup @ cond-xt-old !
 2352:   :NONAME ;
 2353: 
 2354: 
 2355: : Comment ( -- )
 2356:   >in @ Ghost swap >in ! ' swap 
 2357:   2dup >exec-compile ! >exec ! ;
 2358: 
 2359: Comment (       Comment \
 2360: 
 2361: \ compile                                              10may93jaw
 2362: 
 2363: : compile  ( "name" -- ) \ name
 2364:   findghost
 2365:   dup >exec-compile @ ?dup
 2366:   IF    nip compile,
 2367:   ELSE  postpone literal postpone gexecute  THEN ;  immediate restrict
 2368:             
 2369: >TARGET
 2370: 
 2371: : '  ( -- xt ) 
 2372: \G returns the target-cfa of a ghost
 2373:   bl word gfind 0= ABORT" CROSS: Ghost don't exists"
 2374:   g>xt ;
 2375: 
 2376: \ FIXME: this works for the current use cases, but is not
 2377: \ in all cases correct ;-) 
 2378: : comp' X ' 0 ;
 2379: 
 2380: Cond: [']  T ' H alit, ;Cond
 2381: 
 2382: >CROSS
 2383: 
 2384: : [T']
 2385: \ returns the target-cfa of a ghost, or compiles it as literal
 2386:   postpone [G'] 
 2387:   state @ IF postpone g>xt ELSE g>xt THEN ; immediate
 2388: 
 2389: \ \ threading modell					13dec92py
 2390: \ modularized						14jun97jaw
 2391: 
 2392: T 2 cells H Value xt>body
 2393: 
 2394: : (>body)   ( cfa -- pfa ) 
 2395:   xt>body + ;						' (>body) plugin-of t>body
 2396: 
 2397: : fillcfa   ( usedcells -- )
 2398:   T cells H xt>body swap -
 2399:   assert1( dup 0 >= )
 2400:   0 ?DO 0 X c, tchar +LOOP ;
 2401: 
 2402: : (doer,)   ( ghost -- ) 
 2403:   addr, 1 fillcfa ;   					' (doer,) plugin-of doer,
 2404: 
 2405: : (docol,)  ( -- ) [G'] :docol (doer,) ;		' (docol,) plugin-of docol,
 2406: 
 2407:                                                         ' NOOP plugin-of ca>native
 2408: 
 2409: : (doprim,) ( -- )
 2410:   there xt>body + ca>native T a, H 1 fillcfa ;		' (doprim,) plugin-of doprim,
 2411: 
 2412: : (doeshandler,) ( -- ) 
 2413:   T cfalign H [G'] :doesjump addr, T 0 , H ; 		' (doeshandler,) plugin-of doeshandler,
 2414: 
 2415: : (dodoes,) ( does-action-ghost -- )
 2416:   ]comp [G'] :dodoes addr, comp[
 2417:   addr,
 2418:   \ the relocator in the c engine, does not like the
 2419:   \ does-address to marked for relocation
 2420:   [ T e? ec H 0= [IF] ] T here H tcell - reloff [ [THEN] ]
 2421:   2 fillcfa ;						' (dodoes,) plugin-of dodoes,
 2422: 
 2423: : (dlit,) ( n -- ) compile lit td, ;			' (dlit,) plugin-of dlit,
 2424: 
 2425: : (lit,) ( n -- )  s>d dlit, ;				' (lit,) plugin-of lit,
 2426: 
 2427: \ if we dont produce relocatable code alit, defaults to lit, jaw
 2428: \ this is just for convenience, so we don't have to define alit,
 2429: \ seperately for embedded systems....
 2430: T has? relocate H
 2431: [IF]
 2432: : (alit,) ( n -- )  compile lit T  a, H ;		' (alit,) plugin-of alit,
 2433: [ELSE]
 2434: : (alit,) ( n -- )  lit, ;				' (alit,) plugin-of alit,
 2435: [THEN]
 2436: 
 2437: : (fini,)         compile ;s ;				' (fini,) plugin-of fini,
 2438: 
 2439: [IFUNDEF] (code) 
 2440: Defer (code)
 2441: Defer (end-code)
 2442: [THEN]
 2443: 
 2444: >TARGET
 2445: : Code
 2446:   defempty?
 2447:   (THeader ( ghost )
 2448:   ['] prim-resolved over >comp !
 2449:   there resolve-noforwards
 2450:   
 2451:   [ T e? prims H 0= [IF] T e? ITC H [ELSE] true [THEN] ] [IF]
 2452:   doprim, 
 2453:   [THEN]
 2454:   depth (code) ;
 2455: 
 2456: \ FIXME : no-compile -1 ABORT" this ghost is not for compilation" ;
 2457: 
 2458: : Code:
 2459:   defempty?
 2460:     Ghost >r 
 2461:     r@ >ghostname there symentry
 2462:     r@ there ca>native resolve-noforwards
 2463:     <do:> r@ >magic !
 2464:     r> drop
 2465:     depth (code) ;
 2466: 
 2467: : end-code
 2468:     (end-code)
 2469:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
 2470:     ELSE true ABORT" CROSS: Stack empty" THEN
 2471:     ;
 2472: 
 2473: >CROSS
 2474: 
 2475: \ tLiteral                                             12dec92py
 2476: 
 2477: >TARGET
 2478: Cond: \G  T-\G ;Cond
 2479: 
 2480: Cond: Literal  ( n -- )   lit, ;Cond
 2481: Cond: ALiteral ( n -- )   alit, ;Cond
 2482: 
 2483: : Char ( "<char>" -- )  bl word char+ c@ ;
 2484: Cond: [Char]   ( "<char>" -- )  Char  lit, ;Cond
 2485: 
 2486: : (x#) ( adr len base -- )
 2487:   base @ >r base ! 0 0 name >number 2drop drop r> base ! ;
 2488: 
 2489: : d# $0a (x#) ;
 2490: : h# $010 (x#) ;
 2491: 
 2492: Cond: d# $0a (x#) lit, ;Cond
 2493: Cond: h# $010 (x#) lit, ;Cond
 2494: 
 2495: tchar 1 = [IF]
 2496: Cond: chars ;Cond 
 2497: [THEN]
 2498: 
 2499: \ some special literals					27jan97jaw
 2500: 
 2501: Cond: MAXU
 2502:   -1 s>d dlit,
 2503:   ;Cond
 2504: 
 2505: tcell 2 = tcell 4 = or tcell 8 = or 0=
 2506: [IF]
 2507: .( Warning: MINI and MAXI may not work with this host) cr
 2508: [THEN]
 2509: 
 2510: Cond: MINI
 2511:   tcell 2 = IF $8000 ELSE $80000000 THEN 0
 2512:   tcell 8 = IF swap THEN dlit,
 2513:   ;Cond
 2514:  
 2515: Cond: MAXI
 2516:   tcell 2 = IF $7fff ELSE $7fffffff THEN 0
 2517:   tcell 8 = IF drop -1 swap THEN dlit,
 2518:   ;Cond
 2519: 
 2520: >CROSS
 2521: 
 2522: \ Target compiling loop                                12dec92py
 2523: \ ">tib trick thrown out                               10may93jaw
 2524: \ number? defined at the top                           11may93jaw
 2525: \ replaced >in by save-input				
 2526: 
 2527: : discard 0 ?DO drop LOOP ;
 2528: 
 2529: \ compiled word might leave items on stack!
 2530: : tcom ( x1 .. xn n name -- )
 2531: \  dup count type space
 2532:   gfind 
 2533:   IF    >r ( discard saved input state ) discard r>
 2534: 	dup >exec-compile @ ?dup
 2535:         IF   nip execute-exec-compile ELSE gexecute  THEN 
 2536: 	EXIT 
 2537:   THEN
 2538:   number? dup  
 2539:   IF	0> IF swap lit,  THEN  lit, discard
 2540:   ELSE	2drop restore-input throw Ghost gexecute THEN  ;
 2541: 
 2542: \ : ; DOES>                                            13dec92py
 2543: \ ]                                                     9may93py/jaw
 2544: 
 2545: >CROSS
 2546: 
 2547: : compiling-state ( -- )
 2548: \G set states to compililng
 2549:     Compiling comp-state !
 2550:     \ if we have a state in target, change it with the compile state
 2551:     [G'] state dup undefined? 0= 
 2552:     IF >ghost-xt @ execute X on ELSE drop THEN ;
 2553: 
 2554: : interpreting-state ( -- )
 2555: \G set states to interpreting
 2556:    \ if target has a state variable, change it according to our state
 2557:    [G'] state dup undefined? 0= 
 2558:    IF >ghost-xt @ execute X off ELSE drop THEN
 2559:    Interpreting comp-state ! ;
 2560: 
 2561: >TARGET
 2562: 
 2563: : ] 
 2564:     compiling-state
 2565:     BEGIN
 2566:         BEGIN save-input bl word
 2567:               dup c@ 0= WHILE drop discard refill 0=
 2568:               ABORT" CROSS: End of file while target compiling"
 2569:         REPEAT
 2570:         tcom
 2571:         compiling? 0=
 2572:     UNTIL ;
 2573: 
 2574: \ by the way: defining a second interpreter (a compiler-)loop
 2575: \             is not allowed if a system should be ans conform
 2576: 
 2577: : (:) ( ghost -- ) 
 2578: \ common factor of : and :noname. Prepare ;Resolve and start definition
 2579:    ;Resolve ! there ;Resolve cell+ !
 2580:    docol, ]comp  colon-start depth T ] H ;
 2581: 
 2582: : : ( -- colon-sys ) \ Name
 2583:   defempty?
 2584:   constflag off \ don't let this flag work over colon defs
 2585: 		\ just to go sure nothing unwanted happens
 2586:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
 2587:   (THeader (:) ;
 2588: 
 2589: : :noname ( -- colon-sys )
 2590:   switchrom X cfalign there 
 2591:   \ define a nameless ghost
 2592:   here ghostheader dup last-header-ghost ! dup to lastghost
 2593:   (:) ;  
 2594: 
 2595: Cond: EXIT ( -- )   compile ;S  ;Cond
 2596: 
 2597: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
 2598: 
 2599: >CROSS
 2600: : LastXT ;Resolve @ 0= abort" CROSS: no definition for LastXT"
 2601:          ;Resolve cell+ @ ;
 2602: 
 2603: >TARGET
 2604: 
 2605: Cond: recurse ( -- ) Last-Header-Ghost @ gexecute ;Cond
 2606: 
 2607: Cond: ; ( -- ) 
 2608: 	depth ?dup 
 2609: 	IF   1- <> ABORT" CROSS: Stack changed"
 2610: 	ELSE true ABORT" CROSS: Stack empty" 
 2611: 	THEN
 2612: 	colon-end
 2613: 	fini,
 2614: 	comp[
 2615: 	;Resolve @ 
 2616: 	IF  ['] colon-resolved ;Resolve @ >comp !
 2617: 	    ;Resolve @ ;Resolve cell+ @ resolve 
 2618: 	THEN
 2619: 	interpreting-state
 2620: 	;Cond
 2621: 
 2622: Cond: [ ( -- ) interpreting-state ;Cond
 2623: 
 2624: >CROSS
 2625: 
 2626: 0 Value created
 2627: 
 2628: : !does ( does-action -- )
 2629:     tlastcfa @ [G'] :dovar killref
 2630:     >space here >r ghostheader space>
 2631:     ['] colon-resolved r@ >comp !
 2632:     r@ created >do:ghost ! r@ swap resolve
 2633:     r> tlastcfa @ >tempdp dodoes, tempdp> ;
 2634: 
 2635: Defer instant-interpret-does>-hook  ' noop IS instant-interpret-does>-hook
 2636: 
 2637: T has? primcentric H [IF]
 2638: : does-resolved ( ghost -- )
 2639:     compile does-exec g>xt T a, H ;
 2640: [ELSE]
 2641: : does-resolved ( ghost -- )
 2642:     g>xt T a, H ;
 2643: [THEN]
 2644: 
 2645: : resolve-does>-part ( -- )
 2646: \ resolve words made by builders
 2647:   Last-Header-Ghost @ >do:ghost @ ?dup 
 2648:   IF  there resolve  THEN ;
 2649: 
 2650: >TARGET
 2651: Cond: DOES>
 2652:         T here H [ T has? primcentric H [IF] ] 5 [ [ELSE] ] 4 [ [THEN] ] T cells
 2653:         H + alit, compile (does>2) compile ;s
 2654:         doeshandler, resolve-does>-part
 2655:         ;Cond
 2656: 
 2657: : DOES>
 2658:     ['] does-resolved created >comp !
 2659:     switchrom doeshandler, T here H !does 
 2660:     instant-interpret-does>-hook
 2661:     depth T ] H ;
 2662: 
 2663: >CROSS
 2664: \ Creation                                              01nov92py
 2665: 
 2666: \ Builder                                               11may93jaw
 2667: 
 2668: 0 Value built
 2669: 
 2670: : Builder    ( Create-xt do-ghost "name" -- )
 2671: \ builds up a builder in current vocabulary
 2672: \ create-xt is executed when word is interpreted
 2673: \ do:-xt is executed when the created word from builder is executed
 2674: \ for do:-xt an additional entry after the normal ghost-entrys is used
 2675: 
 2676:   ghost to built 
 2677:   built >created @ 0= IF
 2678:     built >created on
 2679:   THEN ;
 2680: 
 2681: : gdoes,  ( ghost -- )
 2682: \ makes the codefield for a word that is built
 2683:   >do:ghost @ dup undefined? 0=
 2684:   IF
 2685: 	dup >magic @ <do:> =
 2686: 	IF 	 doer, 
 2687: 	ELSE	dodoes,
 2688: 	THEN
 2689: 	EXIT
 2690:   THEN
 2691: \  compile :dodoes gexecute
 2692: \  T here H tcell - reloff 
 2693:   2 refered 
 2694:   0 fillcfa
 2695:   ;
 2696: 
 2697: : takeover-x-semantics ( S constructor-ghost new-ghost -- )
 2698:    \g stores execution semantic and compilation semantic in the built word
 2699:    swap >do:ghost @ 2dup swap >do:ghost !
 2700:    \ we use the >exec2 field for the semantic of a created word,
 2701:    \ using exec or exec2 makes no difference for normal cross-compilation
 2702:    \ but is usefull for instant where the exec field is already
 2703:    \ defined (e.g. Vocabularies)
 2704:    2dup >exec @ swap >exec2 ! 
 2705:    >comp @ swap >comp ! ;
 2706: 
 2707: 0 Value createhere
 2708: 
 2709: : create-resolve ( -- )
 2710:     created createhere resolve 0 ;Resolve ! ;
 2711: : create-resolve-immediate ( -- )
 2712:     create-resolve T immediate H ;
 2713: 
 2714: : TCreate ( <name> -- )
 2715:   create-forward-warn
 2716:   IF ['] reswarn-forward IS resolve-warning THEN
 2717:   executed-ghost @ (Theader
 2718:   dup >created on  dup to created
 2719:   2dup takeover-x-semantics
 2720:   there to createhere drop gdoes, ;
 2721: 
 2722: : RTCreate ( <name> -- )
 2723: \ creates a new word with code-field in ram
 2724:   create-forward-warn
 2725:   IF ['] reswarn-forward IS resolve-warning THEN
 2726:   \ make Alias
 2727:   executed-ghost @ (THeader 
 2728:   dup >created on  dup to created
 2729:   2dup takeover-x-semantics
 2730:   there 0 T a, H alias-mask flag!
 2731:   \ store poiter to code-field
 2732:   switchram T cfalign H
 2733:   there swap T ! H
 2734:   there tlastcfa ! 
 2735:   there to createhere drop gdoes, ;
 2736: 
 2737: : Build:  ( -- [xt] [colon-sys] )
 2738:   :noname postpone TCreate ;
 2739: 
 2740: : BuildSmart:  ( -- [xt] [colon-sys] )
 2741:   :noname
 2742:   [ T has? rom H [IF] ]
 2743:   postpone RTCreate
 2744:   [ [ELSE] ]
 2745:   postpone TCreate 
 2746:   [ [THEN] ] ;
 2747: 
 2748: : ;Build
 2749:   postpone create-resolve postpone ; built >exec ! ; immediate
 2750: 
 2751: : ;Build-immediate
 2752:     postpone create-resolve-immediate
 2753:     postpone ; built >exec ! ; immediate
 2754: 
 2755: : gdoes>  ( ghost -- addr flag )
 2756:   executed-ghost @ g>body ;
 2757: 
 2758: \ DO: ;DO                                               11may93jaw
 2759: 
 2760: : do:ghost! ( ghost -- ) built >do:ghost ! ;
 2761: : doexec! ( xt -- ) built >do:ghost @ >exec ! ;
 2762: 
 2763: : DO:     ( -- [xt] [colon-sys] )
 2764:   here ghostheader do:ghost!
 2765:   :noname postpone gdoes> ;
 2766: 
 2767: : by:     ( -- [xt] [colon-sys] ) \ name
 2768:   Ghost do:ghost!
 2769:   :noname postpone gdoes> ;
 2770: 
 2771: : ;DO ( [xt] [colon-sys] -- )
 2772:   postpone ; doexec! ; immediate
 2773: 
 2774: : by      ( -- ) \ Name
 2775:   Ghost >do:ghost @ do:ghost! ;
 2776: 
 2777: : compile: ( --[xt] [colon-sys] )
 2778: \G defines a compile time action for created words
 2779: \G by this builder
 2780:   :noname ;
 2781: 
 2782: : ;compile ( [xt] [colon-sys] -- )
 2783:   postpone ; built >do:ghost @ >comp ! ; immediate
 2784: 
 2785: \ Variables and Constants                              05dec92py
 2786: 
 2787: Builder (Constant)
 2788: Build:  ( n -- ) ;Build
 2789: by: :docon ( target-body-addr -- n ) T @ H ;DO
 2790: 
 2791: Builder Constant
 2792: Build:  ( n -- ) T , H ;Build
 2793: by (Constant)
 2794: 
 2795: Builder AConstant
 2796: Build:  ( n -- ) T A, H ;Build
 2797: by (Constant)
 2798: 
 2799: Builder 2Constant
 2800: Build:  ( d -- ) T , , H ;Build
 2801: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
 2802: 
 2803: Builder Create
 2804: BuildSmart: ;Build
 2805: by: :dovar ( target-body-addr -- addr ) ;DO
 2806: 
 2807: Builder Variable
 2808: T has? rom H [IF]
 2809: Build: ( -- ) T here 0 A, H switchram T align here swap ! 0 , H ( switchrom ) ;Build
 2810: by (Constant)
 2811: [ELSE]
 2812: Build: T 0 , H ;Build
 2813: by Create
 2814: [THEN]
 2815: 
 2816: Builder 2Variable
 2817: T has? rom H [IF]
 2818: Build: ( -- ) T here 0 A, H switchram T align here swap ! 0 , 0 , H ( switchrom ) ;Build
 2819: by (Constant)
 2820: [ELSE]
 2821: Build: T 0 , 0 , H ;Build
 2822: by Create
 2823: [THEN]
 2824: 
 2825: Builder AVariable
 2826: T has? rom H [IF]
 2827: Build: ( -- ) T here 0 A, H switchram T align here swap ! 0 A, H ( switchrom ) ;Build
 2828: by (Constant)
 2829: [ELSE]
 2830: Build: T 0 A, H ;Build
 2831: by Create
 2832: [THEN]
 2833: 
 2834: \ User variables                                       04may94py
 2835: 
 2836: : tup@ user-region >rstart @ ;
 2837: 
 2838: \ Variable tup  0 tup !
 2839: \ Variable tudp 0 tudp !
 2840: 
 2841: : u,  ( n -- udp )
 2842:   current-region >r user-region activate
 2843:   X here swap X , tup@ -
 2844:   r> activate ;
 2845: 
 2846: : au, ( n -- udp )
 2847:   current-region >r user-region activate
 2848:   X here swap X a, tup@ - 
 2849:   r> activate ;
 2850: 
 2851: T has? no-userspace H [IF]
 2852: 
 2853: : buildby
 2854:   ghost >exec @ built >exec ! ;
 2855: 
 2856: Builder User
 2857: buildby Variable
 2858: by Variable
 2859: 
 2860: Builder 2User
 2861: buildby 2Variable
 2862: by 2Variable
 2863: 
 2864: Builder AUser
 2865: buildby AVariable
 2866: by AVariable
 2867: 
 2868: [ELSE]
 2869: 
 2870: Builder User
 2871: Build: 0 u, X , ;Build
 2872: by: :douser ( ghost -- up-addr )  X @ tup@ + ;DO
 2873: 
 2874: Builder 2User
 2875: Build: 0 u, X , 0 u, drop ;Build
 2876: by User
 2877: 
 2878: Builder AUser
 2879: Build: 0 au, X , ;Build
 2880: by User
 2881: 
 2882: [THEN]
 2883: 
 2884: T has? rom H [IF]
 2885: Builder (Value)
 2886: Build:  ( n -- ) ;Build
 2887: by: :dovalue ( target-body-addr -- n ) T @ @ H ;DO
 2888: 
 2889: Builder Value
 2890: Build: T here 0 A, H switchram T align here swap ! , H ;Build
 2891: by (Value)
 2892: 
 2893: Builder AValue
 2894: Build: T here 0 A, H switchram T align here swap ! A, H ;Build
 2895: by (Value)
 2896: [ELSE]
 2897: Builder (Value)
 2898: Build:  ( n -- ) ;Build
 2899: by: :dovalue ( target-body-addr -- n ) T @ H ;DO
 2900: 
 2901: Builder Value
 2902: BuildSmart: T , H ;Build
 2903: by (Value)
 2904: 
 2905: Builder AValue
 2906: BuildSmart: T A, H ;Build
 2907: by (Value)
 2908: [THEN]
 2909: 
 2910: Defer texecute
 2911: 
 2912: Builder Defer
 2913: T has? rom H [IF]
 2914:     Build: ( -- )  T here 0 A, H switchram T align here swap ! H [T'] noop T A, H ( switchrom ) ;Build
 2915:     by: :dodefer ( ghost -- ) X @ X @ texecute ;DO
 2916: [ELSE]
 2917:     BuildSmart:  ( -- ) [T'] noop T A, H ;Build
 2918:     by: :dodefer ( ghost -- ) X @ texecute ;DO
 2919: [THEN]
 2920: 
 2921: Builder interpret/compile:
 2922: Build: ( inter comp -- ) swap T A, A, H ;Build-immediate
 2923: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
 2924: 
 2925: \ Sturctures                                           23feb95py
 2926: 
 2927: : nalign ( addr1 n -- addr2 )
 2928: \ addr2 is the aligned version of addr1 wrt the alignment size n
 2929:  1- tuck +  swap invert and ;
 2930: 
 2931: 
 2932: Builder (Field)
 2933: Build: ;Build
 2934: by: :dofield T @ H + ;DO
 2935: 
 2936: Builder Field
 2937: Build: ( align1 offset1 align size "name" --  align2 offset2 )
 2938:     rot dup T , H ( align1 align size offset1 )
 2939:     + >r nalign r> ;Build
 2940: by (Field)
 2941: 
 2942: >TARGET
 2943: : struct  T 1 chars 0 H ;
 2944: : end-struct  T 2Constant H ;
 2945: 
 2946: : cell% ( n -- size align )
 2947:     T 1 cells H dup ;
 2948: >CROSS
 2949: 
 2950: \ Input-Methods                                            01py
 2951: 
 2952: Builder input-method
 2953: Build: ( m v -- m' v )  dup T , cell+ H ;Build
 2954: DO:  abort" Not in cross mode" ;DO
 2955: 
 2956: Builder input-var
 2957: Build: ( m v size -- m v' )  over T , H + ;Build
 2958: DO:  abort" Not in cross mode" ;DO
 2959: 
 2960: \ Peephole optimization					05sep01jaw
 2961: 
 2962: \ this section defines different compilation
 2963: \ actions for created words
 2964: \ this will help the peephole optimizer
 2965: \ I (jaw) took this from bernds latest cross-compiler
 2966: \ changes but seperated it from the original
 2967: \ Builder words. The final plan is to put this
 2968: \ into a seperate file, together with the peephole
 2969: \ optimizer for cross
 2970: 
 2971: 
 2972: T has? primcentric H [IF]
 2973: 
 2974: \ .( loading peephole optimization) cr
 2975: 
 2976: >CROSS
 2977: 
 2978: : (callc) compile call T >body a, H ;		' (callc) plugin-of colon,
 2979: : (callcm) T here 0 a, 0 a, H ;                 ' (callcm) plugin-of colonmark,
 2980: : (call-res) >tempdp resolved gexecute tempdp> drop ;
 2981:                                                 ' (call-res) plugin-of colon-resolve
 2982: T has? ec H [IF]
 2983: : (pprim) T @ H >signed dup 0< IF  $4000 -  ELSE
 2984:     cr ." wrong usage of (prim) "
 2985:     dup gdiscover IF  .ghost  ELSE  .  THEN  cr -1 throw  THEN
 2986:     T a, H ;					' (pprim) plugin-of prim,
 2987: [ELSE]
 2988: : (pprim) dup 0< IF  $4000 -  ELSE
 2989:     cr ." wrong usage of (prim) "
 2990:     dup gdiscover IF  .ghost  ELSE  .  THEN  cr -1 throw  THEN
 2991:     T a, H ;					' (pprim) plugin-of prim,
 2992: [THEN]
 2993: 
 2994: \ if we want this, we have to spilt aconstant
 2995: \ and constant!!
 2996: \ Builder (Constant)
 2997: \ compile: g>body X @ lit, ;compile
 2998: 
 2999: Builder (Constant)
 3000: compile: g>body compile lit@ T a, H ;compile
 3001: 
 3002: Builder (Value)
 3003: compile: g>body compile lit@ T a, H ;compile
 3004: 
 3005: \ this changes also Variable, AVariable and 2Variable
 3006: Builder Create
 3007: compile: g>body alit, ;compile
 3008: 
 3009: Builder User
 3010: compile: g>body compile useraddr T @ , H ;compile
 3011: 
 3012: Builder Defer
 3013: compile: g>body compile lit-perform T A, H ;compile
 3014: 
 3015: Builder (Field)
 3016: compile: g>body T @ H compile lit+ T here H reloff T , H ;compile
 3017: 
 3018: Builder interpret/compile:
 3019: compile: does-resolved ;compile
 3020: 
 3021: Builder input-method
 3022: compile: does-resolved ;compile
 3023: 
 3024: Builder input-var
 3025: compile: does-resolved ;compile
 3026: 
 3027: [THEN]
 3028: 
 3029: \ structural conditionals                              17dec92py
 3030: 
 3031: >CROSS
 3032: : (ncontrols?) ( n -- ) 
 3033: \g We expect n open control structures
 3034:   depth over u<= 
 3035:   ABORT" CROSS: unstructured, stack underflow"
 3036:   0 ?DO I pick 0= 
 3037:         ABORT" CROSS: unstructured" 
 3038:   LOOP ;					' (ncontrols?) plugin-of ncontrols?
 3039: 
 3040: \ : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
 3041: \ : sys?        ( sys -- sys )    dup 0= ?struc ;
 3042: 
 3043: : >mark       ( -- sys )        T here  ( dup ." M" hex. ) 0 , H ;
 3044: 
 3045: X has? abranch [IF]
 3046:     : branchoffset ( src dest -- )  drop ;
 3047:     : offset, ( n -- )  X A, ;
 3048: [ELSE]
 3049:     : branchoffset ( src dest -- )  - tchar / ; \ ?? jaw
 3050:     : offset, ( n -- )  X , ;
 3051: [THEN]
 3052: 
 3053: :noname compile branch X here branchoffset offset, ;
 3054:   IS branch, ( target-addr -- )
 3055: :noname compile ?branch X here branchoffset offset, ;
 3056:   IS ?branch, ( target-addr -- )
 3057: :noname compile branch T here 0 H offset, ;
 3058:   IS branchmark, ( -- branchtoken )
 3059: :noname compile ?branch T here 0 H offset, ;
 3060:   IS ?branchmark, ( -- branchtoken )
 3061: :noname T here 0 H offset, ;
 3062:   IS ?domark, ( -- branchtoken )
 3063: :noname dup X @ ?struc X here over branchoffset swap X ! ;
 3064:   IS branchtoresolve, ( branchtoken -- )
 3065: :noname branchto, X here ;
 3066:   IS branchtomark, ( -- target-addr )
 3067: 
 3068: >TARGET
 3069: 
 3070: \ Structural Conditionals                              12dec92py
 3071: 
 3072: \ CLEANUP Cond: BUT       sys? swap ;Cond
 3073: \ CLEANUP Cond: YET       sys? dup ;Cond
 3074: 
 3075: >CROSS
 3076: 
 3077: Variable tleavings 0 tleavings !
 3078: 
 3079: : (done) ( do-addr -- )
 3080: \G resolve branches of leave and ?leave and ?do
 3081: \G do-addr is the address of the beginning of our
 3082: \G loop so we can take care of nested loops
 3083:     tleavings @
 3084:     BEGIN  dup
 3085:     WHILE
 3086: 	>r dup r@ cell+ @ \ address of branch
 3087: 	u> 0=	   \ lower than DO?	
 3088:     WHILE
 3089: 	r@ 2 cells + @ \ branch token
 3090: 	branchtoresolve,
 3091: 	r@ @ r> free throw
 3092:     REPEAT  r>  THEN
 3093:     tleavings ! drop ;
 3094: 
 3095: >TARGET
 3096: 
 3097: \ What for? ANS? JAW Cond: DONE   ( addr -- )  (done) ;Cond
 3098: 
 3099: >CROSS
 3100: : (leave) ( branchtoken -- )
 3101:     3 cells allocate throw >r
 3102:     T here H r@ cell+ !
 3103:     r@ 2 cells + !
 3104:     tleavings @ r@ !
 3105:     r> tleavings ! ;
 3106: >TARGET
 3107: 
 3108: : (leave,) ( -- ) 
 3109:   branchmark, (leave) ; 			' (leave,) plugin-of leave,
 3110: 
 3111: : (?leave,) ( -- )
 3112:   compile 0= ?branchmark, (leave) ; 		' (?leave,) plugin-of ?leave,
 3113: 
 3114: Cond: LEAVE     leave, ;Cond
 3115: Cond: ?LEAVE    ?leave, ;Cond
 3116: 
 3117: >CROSS
 3118: \ !!JW ToDo : Move to general tools section
 3119: 
 3120: : to1 ( x1 x2 xn n -- addr )
 3121: \G packs n stack elements in am allocated memory region
 3122:    dup dup 1+ cells allocate throw dup >r swap 1+
 3123:    0 DO tuck ! cell+ LOOP
 3124:    drop r> ;
 3125: 
 3126: : 1to ( addr -- x1 x2 xn )
 3127: \G unpacks the elements saved by to1
 3128:     dup @ swap over cells + swap
 3129:     0 DO  dup @ swap 1 cells -  LOOP
 3130:     free throw ;
 3131: 
 3132: : loop] ( target-addr -- )
 3133:   branchto, 
 3134:   dup 	X here branchoffset offset, 
 3135:   tcell - (done) ;
 3136: 
 3137: : skiploop] ?dup IF branchto, branchtoresolve, THEN ;
 3138: 
 3139: >TARGET
 3140: 
 3141: \ Structural Conditionals                              12dec92py
 3142: 
 3143: : (cs-swap) ( x1 x2 -- x2 x1 )
 3144:   swap ;					' (cs-swap) plugin-of cs-swap
 3145: 
 3146: : (ahead,) branchmark, ; 			' (ahead,) plugin-of ahead,
 3147: 
 3148: : (if,) ?branchmark, ; 				' (if,) plugin-of if,
 3149: 
 3150: : (then,) branchto, branchtoresolve, ; 		' (then,) plugin-of then,
 3151: 
 3152: : (else,) ( ahead ) branchmark, 
 3153:           swap 
 3154:           ( then ) branchto, branchtoresolve, ;	' (else,) plugin-of else,
 3155: 
 3156: : (begin,) branchtomark, ; 			' (begin,) plugin-of begin,
 3157: 
 3158: : (while,) ( if ) ?branchmark,
 3159:            swap ; 				' (while,) plugin-of while,
 3160: 
 3161: : (again,) branch, ;				' (again,) plugin-of again,
 3162: 
 3163: : (until,) ?branch, ;				' (until,) plugin-of until,
 3164: 
 3165: : (repeat,) ( again ) branch,
 3166:             ( then ) branchto, branchtoresolve, ; ' (repeat,) plugin-of repeat,
 3167: 
 3168: : (case,)   ( -- n )
 3169:   0 ;						' (case,) plugin-of case,
 3170: 
 3171: : (of,) ( n -- x1 n )
 3172:   1+ >r 
 3173:   compile over compile = 
 3174:   if, compile drop r> ;				' (of,) plugin-of of,
 3175: 
 3176: : (endof,) ( x1 n -- x2 n )
 3177:   >r 1 ncontrols? else, r> ;			' (endof,) plugin-of endof,
 3178: 
 3179: : (endcase,) ( x1 .. xn n -- )
 3180:   compile drop 0 ?DO 1 ncontrols? then, LOOP ;	' (endcase,) plugin-of endcase,
 3181: 
 3182: >TARGET
 3183: Cond: AHEAD     ahead, ;Cond
 3184: Cond: IF        if,  ;Cond
 3185: Cond: THEN      1 ncontrols? then, ;Cond
 3186: Cond: ENDIF     1 ncontrols? then, ;Cond
 3187: Cond: ELSE      1 ncontrols? else, ;Cond
 3188: 
 3189: Cond: BEGIN     begin, ;Cond
 3190: Cond: WHILE     1 ncontrols? while, ;Cond
 3191: Cond: AGAIN     1 ncontrols? again, ;Cond
 3192: Cond: UNTIL     1 ncontrols? until, ;Cond
 3193: Cond: REPEAT    2 ncontrols? repeat, ;Cond
 3194: 
 3195: Cond: CASE      case, ;Cond
 3196: Cond: OF        of, ;Cond
 3197: Cond: ENDOF     endof, ;Cond
 3198: Cond: ENDCASE   endcase, ;Cond
 3199: 
 3200: \ Structural Conditionals                              12dec92py
 3201: 
 3202: : (do,) ( -- target-addr )
 3203:   \ ?? i think 0 is too much! jaw
 3204:     0 compile (do)
 3205:     branchtomark,  2 to1 ;			' (do,) plugin-of do,
 3206: 
 3207: \ alternative for if no ?do
 3208: \ : (do,)
 3209: \     compile 2dup compile = compile IF
 3210: \     compile 2drop compile ELSE
 3211: \     compile (do) branchtomark, 2 to1 ;
 3212:     
 3213: : (?do,) ( -- target-addr )
 3214:     0 compile (?do)  ?domark, (leave)
 3215:     branchtomark,  2 to1 ;			' (?do,) plugin-of ?do,
 3216: 
 3217: : (for,) ( -- target-addr )
 3218:   compile (for) branchtomark, ;			' (for,) plugin-of for,
 3219: 
 3220: : (loop,) ( target-addr -- )
 3221:   1to compile (loop)  loop] 
 3222:   compile unloop skiploop] ;			' (loop,) plugin-of loop,
 3223: 
 3224: : (+loop,) ( target-addr -- )
 3225:   1to compile (+loop)  loop] 
 3226:   compile unloop skiploop] ;			' (+loop,) plugin-of +loop,
 3227: 
 3228: : (next,) 
 3229:   compile (next)  loop] compile unloop ;	' (next,) plugin-of next,
 3230: 
 3231: Cond: DO      	do, ;Cond
 3232: Cond: ?DO     	?do, ;Cond
 3233: Cond: FOR	for, ;Cond
 3234: 
 3235: Cond: LOOP	1 ncontrols? loop, ;Cond
 3236: Cond: +LOOP	1 ncontrols? +loop, ;Cond
 3237: Cond: NEXT	1 ncontrols? next, ;Cond
 3238: 
 3239: \ String words                                         23feb93py
 3240: 
 3241: : ,"            [char] " parse ht-string, X align ;
 3242: 
 3243: X has? control-rack [IF]
 3244: Cond: ."        compile (.")     T ," H ;Cond
 3245: Cond: S"        compile (S")     T ," H ;Cond
 3246: Cond: C"        compile (C")     T ," H ;Cond
 3247: Cond: ABORT"    compile (ABORT") T ," H ;Cond
 3248: [ELSE]
 3249: Cond: ."        '" parse tuck 2>r ahead, there 2r> ht-mem, X align
 3250:                 >r then, r> compile ALiteral compile Literal compile type ;Cond
 3251: Cond: S"        '" parse tuck 2>r ahead, there 2r> ht-mem, X align
 3252:                 >r then, r> compile ALiteral compile Literal ;Cond
 3253: Cond: C"        ahead, there [char] " parse ht-string, X align
 3254:                 >r then, r> compile ALiteral ;Cond
 3255: Cond: ABORT"    if, ahead, there [char] " parse ht-string, X align
 3256:                 >r then, r> compile ALiteral compile c(abort") then, ;Cond
 3257: [THEN]
 3258: 
 3259: X has? rom [IF]
 3260: Cond: IS        T ' >body @ H compile ALiteral compile ! ;Cond
 3261: : IS            T >address ' >body @ ! H ;
 3262: Cond: TO        T ' >body @ H compile ALiteral compile ! ;Cond
 3263: : TO            T ' >body @ ! H ;
 3264: Cond: CTO       T ' >body H compile ALiteral compile ! ;Cond
 3265: : CTO           T ' >body ! H ;
 3266: [ELSE]
 3267: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
 3268: : IS            T >address ' >body ! H ;
 3269: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
 3270: : TO            T ' >body ! H ;
 3271: [THEN]
 3272: 
 3273: Cond: defers	T ' >body @ compile, H ;Cond
 3274: 
 3275: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
 3276: 
 3277: \ linked list primitive
 3278: : linked        X here over X @ X A, swap X ! ;
 3279: : chained	T linked A, H ;
 3280: 
 3281: : err"   s" ErrLink linked" evaluate T , H
 3282:          [char] " parse ht-string, X align ;
 3283: 
 3284: : env"  [char] " parse s" EnvLink linked" evaluate
 3285:         ht-string, X align X , ;
 3286: 
 3287: : 2env" [char] " parse s" EnvLink linked" evaluate
 3288:         here >r ht-string, X align X , X ,
 3289:         r> dup T c@ H 80 and swap T c! H ;
 3290: 
 3291: \ compile must be last                                 22feb93py
 3292: 
 3293: Cond: [compile] ( -- ) \ name
 3294: \g For immediate words, works even if forward reference
 3295:       bl word gfind 0= ABORT" CROSS: Can't compile"
 3296:       (gexecute) ;Cond
 3297: 	   
 3298: Cond: postpone ( -- ) \ name
 3299:       bl word gfind 0= ABORT" CROSS: Can't compile"
 3300:       dup >magic @ <fwd> =
 3301:       ABORT" CROSS: Can't postpone on forward declaration"
 3302:       dup >magic @ <imm> =
 3303:       IF   (gexecute)
 3304:       ELSE >link @ alit, compile compile,  THEN ;Cond
 3305: 	   
 3306: \ save-cross                                           17mar93py
 3307: 
 3308: hex
 3309: 
 3310: >CROSS
 3311: Create magic  s" Gforth3x" here over allot swap move
 3312: 
 3313: bigendian 1+ \ strangely, in magic big=0, little=1
 3314: tcell 1 = 0 and or
 3315: tcell 2 = 2 and or
 3316: tcell 4 = 4 and or
 3317: tcell 8 = 6 and or
 3318: tchar 1 = 00 and or
 3319: tchar 2 = 28 and or
 3320: tchar 4 = 50 and or
 3321: tchar 8 = 78 and or
 3322: magic 7 + c!
 3323: 
 3324: : save-cross ( "image-name" "binary-name" -- )
 3325:   .regions \  s" ec" X $has? IF  .regions  THEN
 3326:   bl parse ." Saving to " 2dup type cr
 3327:   w/o bin create-file throw >r
 3328:   s" header" X $has? IF
 3329:       s" #! "           r@ write-file throw
 3330:       bl parse          r@ write-file throw
 3331:       s"  --image-file" r@ write-file throw
 3332:       #lf       r@ emit-file throw
 3333:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
 3334:       ?do
 3335: 	  bl over emit-file throw
 3336:       loop
 3337:       drop
 3338:       magic 8       r@ write-file throw \ write magic
 3339:   ELSE
 3340:       bl parse 2drop
 3341:   THEN
 3342:   >rom dictionary >rmem @ there
 3343:   s" rom" X $has? IF  dictionary >rstart @ -  THEN
 3344:   r@ write-file throw \ write image
 3345:   s" relocate" X $has? IF
 3346:       dictionary >rbm @ there 1- tcell>bit rshift 1+
 3347:                 r@ write-file throw \ write tags
 3348:   THEN
 3349:   r> close-file throw ;
 3350: 
 3351: : save-region ( addr len -- )
 3352:   bl parse w/o bin create-file throw >r
 3353:   swap >image swap r@ write-file throw
 3354:   r> close-file throw ;
 3355: 
 3356: \ save-asm-region                         		29aug01jaw
 3357: 
 3358: Variable name-ptr
 3359: Create name-buf 200 chars allot
 3360: : init-name-buf name-buf name-ptr ! ;
 3361: : nb, name-ptr @ c! 1 chars name-ptr +! ;
 3362: : $nb, ( adr len -- ) bounds ?DO I c@ nb, LOOP ;
 3363: : @nb name-ptr @ name-buf tuck - ;
 3364: 
 3365: \ stores a usefull string representation of the character
 3366: \ in the name buffer
 3367: : name-char, ( c -- )
 3368:   dup 'a 'z 1+ within IF nb, EXIT THEN
 3369:   dup 'A 'Z 1+ within IF $20 + nb, EXIT THEN
 3370:   dup '0 '9 1+ within IF nb, EXIT THEN
 3371:   CASE '+ OF s" _PLUS" $nb, ENDOF
 3372:        '- OF s" _MINUS" $nb, ENDOF
 3373:        '* OF s" _STAR" $nb, ENDOF
 3374:        '/ OF s" _SLASH" $nb, ENDOF
 3375:        '' OF s" _TICK" $nb, ENDOF
 3376:        '( OF s" _OPAREN" $nb, ENDOF
 3377:        ') OF s" _CPAREN" $nb, ENDOF
 3378:        '[ OF s" _OBRACKET" $nb, ENDOF
 3379:        '] OF s" _CBRACKET" $nb, ENDOF
 3380:        '! OF s" _STORE" $nb, ENDOF
 3381:        '@ OF s" _FETCH" $nb, ENDOF
 3382:        '> OF s" _GREATER" $nb, ENDOF
 3383:        '< OF s" _LESS" $nb, ENDOF
 3384:        '= OF s" _EQUAL" $nb, ENDOF
 3385:        '# OF s" _HASH" $nb, ENDOF
 3386:        '? OF s" _QUEST" $nb, ENDOF
 3387:        ': OF s" _COL" $nb, ENDOF
 3388:        '; OF s" _SEMICOL" $nb, ENDOF
 3389:        ', OF s" _COMMA" $nb, ENDOF
 3390:        '. OF s" _DOT" $nb, ENDOF
 3391:        '" OF s" _DQUOT" $nb, ENDOF
 3392:        dup 
 3393:        base @ >r hex s>d <# #s 'X hold '_ hold #> $nb, r> base !
 3394:   ENDCASE ;
 3395:  
 3396: : label-from-ghostname ( ghost -- addr len )
 3397:   dup >ghostname init-name-buf 'L nb, bounds 
 3398:   ?DO I c@ name-char, LOOP 
 3399:   \ we add the address to a name to make in unique
 3400:   \ because one name may appear more then once
 3401:   \ there are names (e.g. boot) that may be reference from other
 3402:   \ assembler source files, so we declare them as unique
 3403:   \ and don't add the address suffix
 3404:   dup >ghost-flags @ <unique> and 0= 
 3405:   IF   s" __" $nb, >link @ base @ >r hex 0 <# #s 'L hold #> r> base ! $nb, 
 3406:   ELSE drop 
 3407:   THEN
 3408:   @nb ;
 3409: 
 3410: \ FIXME why disabled?!
 3411: : label-from-ghostnameXX ( ghost -- addr len )
 3412: \ same as (label-from-ghostname) but caches generated names
 3413:   dup >asm-name @ ?dup IF nip count EXIT THEN
 3414:  \ dup >r (label-from-ghostname) 2dup
 3415:   align here >r string, align
 3416:   r> r> >asm-name ! ;
 3417: 
 3418: : primghostdiscover ( xt -- ghost true | xt false )
 3419:   dup 0= IF false EXIT THEN
 3420:   >r last-prim-ghost
 3421:   BEGIN @ dup
 3422:   WHILE dup >asm-dummyaddr @ r@ =
 3423:         IF rdrop true EXIT THEN
 3424:   REPEAT
 3425:   drop r> false ;
 3426: 
 3427: : gdiscover2 ( xt -- ghost true | xt false ) 
 3428:   dup taddr>region 0= IF false EXIT THEN
 3429:   dup (>regiontype) @ dup 0= IF drop false EXIT THEN
 3430:   addr-xt-ghost @ dup 0= IF drop false EXIT THEN
 3431:   nip true ;
 3432: \  dup >ghost-name @ IF nip true ELSE drop false THEN ;
 3433: 
 3434: \ generates a label name for the target address
 3435: : generate-label-name ( taddr -- addr len )
 3436:   gdiscover2
 3437:   IF dup >magic @ <do:> =
 3438:      IF >asm-name @ count EXIT THEN
 3439:      label-from-ghostname
 3440:   ELSE
 3441:      primghostdiscover
 3442:      IF   >asm-name @ count 
 3443:      ELSE base @ >r hex 0 <# #s 'L hold #> r> base !
 3444:      THEN
 3445:   THEN ;
 3446: 
 3447: Variable outfile-fd
 3448: 
 3449: : $out ( adr len -- ) outfile-fd @ write-file throw  ;
 3450: : nlout newline $out ;
 3451: : .ux ( n -- ) 
 3452:   base @ hex swap 0 <# #S #> $out base ! ;
 3453: 
 3454: : save-asm-region-part-aligned ( taddr len -- 'taddr 'len )
 3455:   dup cell/ 0 
 3456:   ?DO nlout s"    .word " $out over @relbit 
 3457:       IF   over X @ generate-label-name $out
 3458:       ELSE over X @ s" 0x0" $out .ux
 3459:       THEN
 3460:       tcell /string
 3461:   LOOP ;
 3462: 
 3463: : print-bytes ( taddr len n -- taddr' len' )
 3464:   over min dup 0> 
 3465:   IF   nlout s"    .byte " $out 0 
 3466:        ?DO  I 0> IF s" , " $out THEN
 3467:             over X c@ s" 0x0" $out .ux 1 /string 
 3468:        LOOP 
 3469:   THEN ;
 3470: 
 3471: : save-asm-region-part ( addr len -- )
 3472:   over dup X aligned swap - ?dup
 3473:   IF   print-bytes THEN
 3474:   save-asm-region-part-aligned
 3475:   dup dup X aligned swap - ?dup
 3476:   IF   2 pick @relbit ABORT" relocated field splitted"
 3477:        print-bytes
 3478:   THEN
 3479:   2drop ;
 3480: 
 3481: : print-label ( taddr -- )
 3482:   nlout generate-label-name $out s" :" $out ;
 3483: 
 3484: : snl-calc ( taddr taddr2 -- )
 3485:   tuck over - ;
 3486: 
 3487: : skip-nolables ( taddr -- taddr2 taddr len )
 3488: \G skips memory region where no lables are defined
 3489: \G starting from taddr+1
 3490: \G Labels will be introduced for each reference mark
 3491: \G in addr-refs.
 3492: \G This word deals with lables at byte addresses as well.
 3493: \G The main idea is to have an intro part which
 3494: \G skips until the next cell boundary, the middle part
 3495: \G which skips whole cells very efficiently and the third
 3496: \G part which skips the bytes to the label in a cell
 3497:   dup 1+ dup (>regiontype) 
 3498:   ( S taddr taddr-realstart type-addr )
 3499:   dup @ dup IF addr-refs @ THEN
 3500:   swap >r
 3501:   over align+ tuck tcell swap - rshift swap 0
 3502:   ?DO dup 1 and 
 3503:      IF drop rdrop snl-calc UNLOOP EXIT THEN 
 3504:      2/ swap 1+ swap 
 3505:   LOOP
 3506:   drop r> cell+
 3507:   ( S .. taddr2 type-addr ) dup
 3508:   BEGIN dup @ dup IF addr-refs @ THEN 0= WHILE cell+ REPEAT
 3509:   dup >r swap - 1 cells / tcell * + r>
 3510:   ( S .. taddr2+skiplencells type-addr )
 3511:   @ addr-refs @ 1 tcell lshift or
 3512:   BEGIN dup 1 and 0= WHILE swap 1+ swap 2/ REPEAT drop
 3513:   ( S .. taddr2+skiplencells+skiplenbytes )
 3514:   snl-calc ;
 3515: 
 3516: : insert-label ( taddr -- )
 3517:   dup 0= IF drop EXIT THEN
 3518:   \ ignore everything which points outside our memory regions
 3519:   \ maybe a primitive pointer or whatever
 3520:   dup taddr>region 0= IF drop EXIT THEN
 3521:   dup >r (>regiontype) define-addr-struct addr-refs dup @ 
 3522:   r> tcell 1- and 1 swap lshift or swap ! ;
 3523: 
 3524: \ this generates a sorted list of addresses which must be labels
 3525: \ it scans therefore a whole region
 3526: : generate-label-list-region ( taddr len -- )
 3527:   BEGIN over @relbit IF over X @ insert-label THEN
 3528:         tcell /string dup 0< 
 3529:   UNTIL 2drop ;
 3530: 
 3531: : generate-label-list ( -- )
 3532:   region-link
 3533:   BEGIN @ dup WHILE 
 3534:         dup 0 >rlink - extent 
 3535:         ?dup IF generate-label-list-region ELSE drop THEN
 3536:   REPEAT drop ;
 3537: 
 3538: : create-outfile ( addr len -- )
 3539:   w/o bin create-file throw outfile-fd ! ;
 3540: 
 3541: : close-outfile ( -- )
 3542:   outfile-fd @ close-file throw ;
 3543: 
 3544: : (save-asm-region) ( region -- )
 3545:   \ ." label list..."
 3546:   generate-label-list
 3547:   \ ." ok!" cr
 3548:   extent ( S taddr len )
 3549:   over insert-label
 3550:   2dup + dup insert-label >r ( R end-label )
 3551:   ( S taddr len ) drop
 3552:   BEGIN
 3553:      dup print-label
 3554:      dup r@ <> WHILE
 3555:      skip-nolables save-asm-region-part
 3556:   REPEAT drop rdrop ;
 3557: 
 3558: : lineout ( addr len -- )
 3559:   outfile-fd @ write-line throw ;  
 3560: 
 3561: : save-asm-region ( region adr len -- )
 3562:   create-outfile (save-asm-region) close-outfile ;
 3563: 
 3564: \ \ minimal definitions
 3565: 	   
 3566: >MINIMAL also minimal
 3567: 
 3568: \ Usefull words                                        13feb93py
 3569: 
 3570: : KB  400 * ;
 3571: 
 3572: \ \ [IF] [ELSE] [THEN] ...				14sep97jaw
 3573: 
 3574: \ it is useful to define our own structures and not to rely
 3575: \ on the words in the host system
 3576: \ The words in the host system might be defined with vocabularies
 3577: \ this doesn't work with our self-made compile-loop
 3578: 
 3579: Create parsed 20 chars allot	\ store word we parsed
 3580: 
 3581: : upcase
 3582:     parsed count bounds
 3583:     ?DO I c@ toupper I c! LOOP ;
 3584: 
 3585: : [ELSE]
 3586:     1 BEGIN
 3587: 	BEGIN bl word count dup WHILE
 3588: 	    comment? 20 umin parsed place upcase parsed count
 3589: 	    2dup s" [IF]" str= >r 
 3590: 	    2dup s" [IFUNDEF]" str= >r
 3591: 	    2dup s" [IFDEF]" str= r> or r> or
 3592: 	    IF   2drop 1+
 3593: 	    ELSE 2dup s" [ELSE]" str=
 3594: 		IF   2drop 1- dup
 3595: 		    IF 1+
 3596: 		    THEN
 3597: 		ELSE
 3598: 		    2dup s" [ENDIF]" str= >r
 3599: 		    s" [THEN]" str= r> or
 3600: 		    IF 1- THEN
 3601: 		THEN
 3602: 	    THEN
 3603: 	    ?dup 0= ?EXIT
 3604: 	REPEAT
 3605: 	2drop refill 0=
 3606:     UNTIL drop ; immediate
 3607:   
 3608: : [THEN] ( -- ) ; immediate
 3609: 
 3610: : [ENDIF] ( -- ) ; immediate
 3611: 
 3612: : [IF] ( flag -- )
 3613:     0= IF postpone [ELSE] THEN ; immediate 
 3614: 
 3615: Cond: [IF]      postpone [IF] ;Cond
 3616: Cond: [THEN]    postpone [THEN] ;Cond
 3617: Cond: [ELSE]    postpone [ELSE] ;Cond
 3618: 
 3619: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
 3620: 
 3621: : defined? tdefined? ;
 3622: : needed? needed? ;
 3623: : doer? doer? ;
 3624: 
 3625: \ we want to use IFDEF on compiler directives (e.g. E?) in the source, too
 3626: 
 3627: : directive? 
 3628:   bl word count [ ' target >wordlist ] literal search-wordlist 
 3629:   dup IF nip THEN ;
 3630: 
 3631: : [IFDEF]  >in @ directive? swap >in !
 3632: 	   0= IF tdefined? ELSE name 2drop true THEN
 3633: 	   postpone [IF] ;
 3634: 
 3635: : [IFUNDEF] tdefined? 0= postpone [IF] ;
 3636: 
 3637: Cond: [IFDEF]   postpone [IFDEF] ;Cond
 3638: 
 3639: Cond: [IFUNDEF] postpone [IFUNDEF] ;Cond
 3640: 
 3641: \ C: \- \+ Conditional Compiling                         09jun93jaw
 3642: 
 3643: : C: >in @ tdefined? 0=
 3644:      IF    >in ! X :
 3645:      ELSE drop
 3646:         BEGIN bl word dup c@
 3647:               IF   count comment? s" ;" str= ?EXIT
 3648:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
 3649:               THEN
 3650:         AGAIN
 3651:      THEN ;
 3652: 
 3653: : d? d? ;
 3654: 
 3655: : \D ( -- "debugswitch" ) 
 3656: \G doesn't skip line when debug switch is on
 3657:     D? 0= IF postpone \ THEN ;
 3658: 
 3659: : \- ( -- "wordname" )
 3660: \G interprets the line if word is not defined
 3661:    tdefined? IF postpone \ THEN ;
 3662: 
 3663: : \+ ( -- "wordname" )
 3664: \G interprets the line if word is defined
 3665:    tdefined? 0= IF postpone \ THEN ;
 3666: 
 3667: : \? ( -- "envorinstring" )
 3668: \G Skip line if environmental variable evaluates to false
 3669:    X has? 0= IF postpone \ THEN ;
 3670: 
 3671: Cond: \- \- ;Cond
 3672: Cond: \+ \+ ;Cond
 3673: Cond: \D \D ;Cond
 3674: Cond: \? \? ;Cond
 3675: 
 3676: : ?? bl word find IF execute ELSE drop 0 THEN ;
 3677: 
 3678: : needed:
 3679: \G defines ghost for words that we want to be compiled
 3680:   BEGIN >in @ bl word c@ WHILE >in ! Ghost drop REPEAT drop ;
 3681: 
 3682: \ words that should be in minimal
 3683: 
 3684: create s-buffer 50 chars allot
 3685: 
 3686: bigendian Constant bigendian
 3687: 
 3688: : here there ;
 3689: : equ constant ;
 3690: : mark there constant ;
 3691: 
 3692: \ compiler directives
 3693: : >ram >ram ;
 3694: : >rom >rom ;
 3695: : >auto >auto ;
 3696: : >tempdp >tempdp ;
 3697: : tempdp> tempdp> ;
 3698: : const constflag on ;
 3699: 
 3700: : Redefinitions-start
 3701: \G Starts a redefinition section. Warnings are disabled and
 3702: \G existing ghosts are reused. This is used in the kernel
 3703: \G where ( and \ and the like are redefined
 3704:   twarnings off warnings off reuse-ghosts on ;
 3705: 
 3706: : Redefinitions-end
 3707: \G Ends a redefinition section. Warnings are enabled again.
 3708:   twarnings on warnings on reuse-ghosts off ;
 3709: 
 3710: : warnings name 3 = 
 3711:   IF twarnings off warnings off ELSE twarnings on warnings on THEN drop ;
 3712: 
 3713: : | ;
 3714: \ : | NoHeaderFlag on ; \ This is broken (damages the last word)
 3715: 
 3716: : save-cross save-cross ;
 3717: : save-region save-region ;
 3718: : tdump swap >image swap dump ;
 3719: 
 3720: also forth 
 3721: [IFDEF] Label           : Label defempty? Label ; [THEN] 
 3722: [IFDEF] start-macros    : start-macros defempty? start-macros ; [THEN]
 3723: \ [IFDEF] builttag	: builttag builttag ;	[THEN]
 3724: previous
 3725: 
 3726: : s" [char] " parse s-buffer place s-buffer count ; \ for environment?
 3727: : + + ;
 3728: : 1+ 1 + ;
 3729: : 2+ 2 + ;
 3730: : 1- 1- ;
 3731: : - - ;
 3732: : and and ;
 3733: : or or ;
 3734: : 2* 2* ;
 3735: : * * ;
 3736: : / / ;
 3737: : dup dup ;
 3738: : ?dup ?dup ;
 3739: : over over ;
 3740: : swap swap ;
 3741: : rot rot ;
 3742: : drop drop ;
 3743: : 2drop 2drop ;
 3744: : =   = ;
 3745: : <>  <> ;
 3746: : 0=   0= ;
 3747: : lshift lshift ;
 3748: : 2/ 2/ ;
 3749: : hex. base @ $10 base ! swap . base ! ;
 3750: : invert invert ;
 3751: : linkstring ( addr u n addr -- )
 3752:     X here over X @ X , swap X ! X , ht-string, X align ;
 3753: \ : . . ;
 3754: 
 3755: : all-words    ['] forced?    IS skip? ;
 3756: : needed-words ['] needed?  IS skip? ;
 3757: : undef-words  ['] defined2? IS skip? ;
 3758: : skipdef skipdef ;
 3759: 
 3760: : \  postpone \ ;  immediate
 3761: : \G T-\G ; immediate
 3762: : (  postpone ( ;  immediate
 3763: : include bl word count included ;
 3764: : included swap >image swap included ;
 3765: : require require ;
 3766: : needs require ;
 3767: : .( [char] ) parse type ;
 3768: : ERROR" [char] " parse 
 3769:   rot 
 3770:   IF cr ." *** " type ."  ***" -1 ABORT" CROSS: Target error, see text above" 
 3771:   ELSE 2drop 
 3772:   THEN ;
 3773: : ." [char] " parse type ;
 3774: : cr cr ;
 3775: 
 3776: : times 0 ?DO dup X c, LOOP drop ; \ used for space table creation
 3777: 
 3778: \ only forth also cross also minimal definitions order
 3779: 
 3780: \ cross-compiler words
 3781: 
 3782: : decimal       decimal [g'] decimal >exec2 @ ?dup IF EXECUTE THEN ;
 3783: : hex           hex [g'] hex >exec2 @ ?dup IF EXECUTE THEN ;
 3784: 
 3785: \ : tudp          X tudp ;
 3786: \ : tup           X tup ;
 3787: 
 3788: : doc-off       false to-doc ! ;
 3789: : doc-on        true  to-doc ! ;
 3790: 
 3791: : declareunique ( "name" -- )
 3792: \ Sets the unique flag for a ghost. The assembler output
 3793: \ generates labels with the ghostname concatenated with the address
 3794: \ while cross-compiling. The address is concatenated
 3795: \ because we have double occurences of the same name.
 3796: \ If we want to reference the labels from the assembler or C
 3797: \ code we declare them unique, so the address is skipped.
 3798:   Ghost >ghost-flags dup @ <unique> or swap ! ;
 3799: 
 3800: \ [IFDEF] dbg : dbg dbg ; [THEN]
 3801: 
 3802: \ for debugging...
 3803: \ : dbg dbg ;
 3804: : horder         order ;
 3805: : hwords        words ;
 3806: \ : words 	also ghosts 
 3807: \                words previous ;
 3808: : .s            .s ;
 3809: : depth         depth ;
 3810: : bye           bye ;
 3811: 
 3812: \ dummy
 3813: 
 3814: \ turnkey direction
 3815: : H forth ; immediate
 3816: : T minimal ; immediate
 3817: : G ghosts ; immediate
 3818: 
 3819: 
 3820: \ these ones are pefered:
 3821: 
 3822: : unlock previous forth also cross ;
 3823: 
 3824: \ also minimal
 3825: >cross
 3826: 
 3827: : turnkey 
 3828:    ghosts-wordlist 1 set-order
 3829:    also target definitions
 3830:    also Minimal also ;
 3831: 
 3832: >minimal
 3833: 
 3834: : [[+++
 3835:   turnkey unlock ;
 3836: 
 3837: unlock definitions also minimal
 3838: 
 3839: : lock   turnkey ;
 3840: 
 3841: Defer +++]]-hook
 3842: : +++]] +++]]-hook lock ;
 3843: 
 3844: LOCK
 3845: \ load cross compiler extension defined in mach file
 3846: 
 3847: UNLOCK >CROSS
 3848: 
 3849: [IFDEF] extend-cross extend-cross [THEN]
 3850: 
 3851: LOCK

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