File:  [gforth] / gforth / cross.fs
Revision 1.55: download - view: text, annotated - select for diffs
Sun May 31 19:29:22 1998 UTC (21 years, 6 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Switched ~+/ with ./

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ Idea and implementation: Bernd Paysan (py)
    3: 
    4: \ Copyright (C) 1995 Free Software Foundation, Inc.
    5: 
    6: \ This file is part of Gforth.
    7: 
    8: \ Gforth is free software; you can redistribute it and/or
    9: \ modify it under the terms of the GNU General Public License
   10: \ as published by the Free Software Foundation; either version 2
   11: \ of the License, or (at your option) any later version.
   12: 
   13: \ This program is distributed in the hope that it will be useful,
   14: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   15: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   16: \ GNU General Public License for more details.
   17: 
   18: \ You should have received a copy of the GNU General Public License
   19: \ along with this program; if not, write to the Free Software
   20: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   21: 
   22: \ Log:
   23: \       changed in ; [ to state off           12may93jaw
   24: \       included place +place                 12may93jaw
   25: \       for a created word (variable, constant...)
   26: \       is now an alias in the target voabulary.
   27: \       this means it is no longer necessary to
   28: \       switch between vocabularies for variable
   29: \       initialization                        12may93jaw
   30: \       discovered error in DOES>
   31: \       replaced !does with (;code)           16may93jaw
   32: \       made complete redesign and
   33: \       introduced two vocs method
   34: \       to be asure that the right words
   35: \       are found                             08jun93jaw
   36: \       btw:  ! works not with 16 bit
   37: \             targets                         09jun93jaw
   38: \       added: 2user and value                11jun93jaw
   39: 
   40: \ 	needed? works better now!!!		01mar97jaw
   41: \	mach file is only loaded into target
   42: \	cell corrected
   43: \ 	romable extansions			27apr97-5jun97jaw
   44: \	environmental query support		01sep97jaw
   45: \	added own [IF] ... [ELSE] ... [THEN]	14sep97jaw
   46: \	extra resolver for doers		20sep97jaw
   47: \	added killref for DOES>			20sep97jaw
   48: 
   49: 
   50: hex     \ the defualt base for the cross-compiler is hex !!
   51: Warnings off
   52: 
   53: \ words that are generaly useful
   54: 
   55: : >wordlist ( vocabulary-xt -- wordlist-struct )
   56:   also execute get-order swap >r 1- set-order r> ;
   57: 
   58: : umax 2dup u< IF swap THEN drop ;
   59: : umin 2dup u> IF swap THEN drop ;
   60: 
   61: : string, ( c-addr u -- )
   62:     \ puts down string as cstring
   63:     dup c, here swap chars dup allot move ;
   64: 
   65: : SetValue ( n -- <name> )
   66: \G Same behaviour as "Value" if the <name> is not defined
   67: \G Same behaviour as "to" if <name> is defined
   68: \G SetValue searches in the current vocabulary
   69:  save-input bl word >r restore-input throw r> count
   70:  get-current search-wordlist
   71:  IF bl word drop >body ! ELSE Value THEN ;
   72: 
   73: : DefaultValue ( n -- <name> )
   74: \G Same behaviour as "Value" if the <name> is not defined
   75: \G DefaultValue searches in the current vocabulary
   76:  save-input bl word >r restore-input throw r> count
   77:  get-current search-wordlist
   78:  IF bl word drop drop drop ELSE Value THEN ;
   79: 
   80: hex
   81: 
   82: Vocabulary Cross
   83: Vocabulary Target
   84: Vocabulary Ghosts
   85: VOCABULARY Minimal
   86: only Forth also Target also also
   87: definitions Forth
   88: 
   89: : T  previous Cross also Target ; immediate
   90: : G  Ghosts ; immediate
   91: : H  previous Forth also Cross ; immediate
   92: 
   93: forth definitions
   94: 
   95: : T  previous Cross also Target ; immediate
   96: : G  Ghosts ; immediate
   97: 
   98: : >cross  also Cross definitions previous ;
   99: : >target also Target definitions previous ;
  100: : >minimal also Minimal definitions previous ;
  101: 
  102: H
  103: 
  104: >CROSS
  105: 
  106: \ 1 Constant Cross-Flag	\ to check whether assembler compiler plug-ins are
  107: 			\ for cross-compiling
  108: \ No! we use "[IFUNDEF]" there to find out whether we are target compiling!!!
  109: 
  110: : comment? ( c-addr u -- c-addr u )
  111:         2dup s" (" compare 0=
  112:         IF    postpone (
  113:         ELSE  2dup s" \" compare 0= IF postpone \ THEN
  114:         THEN ;
  115: 
  116: \ Begin CROSS COMPILER:
  117: 
  118: 
  119: 
  120: \ \ --------------------        Error Handling                  05aug97jaw
  121: 
  122: \ Flags
  123: 
  124: also forth definitions  \ these values may be predefined before
  125:                         \ the cross-compiler is loaded
  126: 
  127: false DefaultValue stack-warn   	 \ check on empty stack at any definition
  128: false DefaultValue create-forward-warn   \ warn on forward declaration of created words
  129: 
  130: [IFUNDEF] DebugMaskSrouce Variable DebugMaskSource 0 DebugMaskSource ! [THEN]
  131: [IFUNDEF] DebugMaskCross  Variable DebugMaskCross  0 DebugMaskCross  ! [THEN]
  132: 
  133: previous >CROSS
  134: 
  135: : .dec
  136:   base @ decimal swap . base ! ;
  137: 
  138: : .sourcepos
  139:   cr sourcefilename type ." :"
  140:   sourceline# .dec ;
  141: 
  142: : warnhead
  143: \G display error-message head
  144: \G perhaps with linenumber and filename
  145:   .sourcepos ." Warning: " ;
  146: 
  147: : empty? depth IF .sourcepos ." Stack not empty!"  THEN ;
  148: 
  149: stack-warn [IF]
  150: : defempty? empty? ;
  151: [ELSE]
  152: : defempty? ; immediate
  153: [THEN]
  154: 
  155: 
  156: 
  157: \ \ GhostNames Ghosts                                  9may93jaw
  158: 
  159: \ second name source to search trough list
  160: 
  161: VARIABLE GhostNames
  162: 0 GhostNames !
  163: 
  164: : GhostName ( -- addr )
  165:     here GhostNames @ , GhostNames ! here 0 ,
  166:     bl word count
  167:     \ 2dup type space
  168:     string, \ !! cfalign ?
  169:     align ;
  170: 
  171: \ Ghost Builder                                        06oct92py
  172: 
  173: \ <T T> new version with temp variable                 10may93jaw
  174: 
  175: VARIABLE VocTemp
  176: 
  177: : <T  get-current VocTemp ! also Ghosts definitions ;
  178: : T>  previous VocTemp @ set-current ;
  179: 
  180: hex
  181: 4711 Constant <fwd>             4712 Constant <res>
  182: 4713 Constant <imm>             4714 Constant <do:>
  183: 
  184: \ iForth makes only immediate directly after create
  185: \ make atonce trick! ?
  186: 
  187: Variable atonce atonce off
  188: 
  189: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  190: 
  191: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  192: 
  193: : >magic ;		\ type of ghost
  194: : >link cell+ ;		\ pointer where ghost is in target, or if unresolved
  195: 			\ points to the where we have to resolve (linked-list)
  196: : >exec cell+ cell+ ;	\ execution symantics (while target compiling) of ghost
  197: : >end 3 cells + ;	\ room for additional tags
  198: 			\ for builder (create, variable...) words the
  199: 			\ execution symantics of words built are placed here
  200: 
  201: Variable executed-ghost \ last executed ghost, needed in tcreate and gdoes>
  202: Variable last-ghost	\ last ghost that is created
  203: Variable last-header-ghost \ last ghost definitions with header
  204: 
  205: : Make-Ghost ( "name" -- ghost )
  206:   >in @ GhostName swap >in !
  207:   <T Create atonce @ IF immediate atonce off THEN
  208:   here tuck swap ! ghostheader T>
  209:   dup last-ghost !
  210:   DOES> dup executed-ghost ! >exec @ execute ;
  211: 
  212: \ ghost words                                          14oct92py
  213: \                                          changed:    10may93py/jaw
  214: 
  215: : gfind   ( string -- ghost true/1 / string false )
  216: \ searches for string in word-list ghosts
  217:   dup count [ ' ghosts >wordlist ] ALiteral search-wordlist
  218:   dup IF >r >body nip r>  THEN ;
  219: 
  220: : gdiscover ( xt -- ghost true | xt false )
  221:   GhostNames
  222:   BEGIN @ dup
  223:   WHILE 2dup
  224:         cell+ @ dup >magic @ <fwd> <>
  225:         >r >link @ = r> and
  226:         IF cell+ @ nip true EXIT THEN
  227:   REPEAT
  228:   drop false ;
  229: 
  230: VARIABLE Already
  231: 
  232: : ghost   ( "name" -- ghost )
  233:   Already off
  234:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  235:   drop  >in !  Make-Ghost ;
  236: 
  237: : >ghostname ( ghost -- adr len )
  238:   GhostNames
  239:   BEGIN @ dup
  240:   WHILE 2dup cell+ @ =
  241:   UNTIL nip 2 cells + count
  242:   ELSE  2drop 
  243: 	\ true abort" CROSS: Ghostnames inconsistent"
  244: 	s" ?!?!?!"
  245:   THEN ;
  246: 
  247: ' >ghostname ALIAS @name
  248: 
  249: : forward? ( ghost -- flag )
  250:   >magic @ <fwd> = ;
  251: 
  252: \ Predefined ghosts                                    12dec92py
  253: 
  254: ghost 0=                                        drop
  255: ghost branch    ghost ?branch                   2drop
  256: ghost (do)      ghost (?do)                     2drop
  257: ghost (for)                                     drop
  258: ghost (loop)    ghost (+loop)                   2drop
  259: ghost (next)                                    drop
  260: ghost unloop    ghost ;S                        2drop
  261: ghost lit       ghost (compile) ghost !         2drop drop
  262: ghost (does>)   ghost noop                      2drop
  263: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  264: ghost '                                         drop
  265: ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
  266: ghost :dovar					drop
  267: ghost over      ghost =         ghost drop      2drop drop
  268: ghost - drop
  269: ghost 2drop drop
  270: ghost 2dup drop
  271: 
  272: \ \ Parameter for target systems                         06oct92py
  273: 
  274: \ we define it ans like...
  275: wordlist Constant target-environment
  276: 
  277: VARIABLE env-current \ save information of current dictionary to restore with environ>
  278: 
  279: : >ENVIRON get-current env-current ! target-environment set-current ;
  280: : ENVIRON> env-current @ set-current ; 
  281: 
  282: >TARGET
  283: 
  284: : environment?
  285:   target-environment search-wordlist 
  286:   IF execute true ELSE false THEN ;
  287: 
  288: : e? name T environment? H 0= ABORT" environment variable not defined!" ;
  289: 
  290: : has? 	name T environment? H 
  291: 	IF 	\ environment variable is present, return its value
  292: 	ELSE	\ environment variable is not present, return false
  293: 		\ !! JAW abort is just for testing
  294: 		false true ABORT" arg" 
  295: 	THEN ;
  296: 
  297: : $has? T environment? H IF ELSE false THEN ;
  298: 
  299: >ENVIRON get-order get-current swap 1+ set-order
  300: true SetValue compiler
  301: true  SetValue cross
  302: true SetValue standard-threading
  303: >TARGET previous
  304: 
  305: mach-file count included hex
  306: 
  307: >ENVIRON
  308: 
  309: T has? ec H
  310: [IF]
  311: false DefaultValue relocate
  312: false DefaultValue file
  313: false DefaultValue OS
  314: false DefaultValue prims
  315: false DefaultValue floating
  316: false DefaultValue glocals
  317: false DefaultValue dcomps
  318: false DefaultValue hash
  319: false DefaultValue xconds
  320: false DefaultValue header
  321: [THEN]
  322: 
  323: true DefaultValue interpreter
  324: true DefaultValue ITC
  325: false DefaultValue rom
  326: 
  327: >TARGET
  328: s" relocate" T environment? H 
  329: [IF]	SetValue NIL
  330: [ELSE]	>ENVIRON T NIL H SetValue relocate
  331: [THEN]
  332: 
  333: >CROSS
  334: 
  335: \ \ Create additional parameters                         19jan95py
  336: 
  337: T
  338: NIL		   Constant TNIL
  339: cell               Constant tcell
  340: cell<<             Constant tcell<<
  341: cell>bit           Constant tcell>bit
  342: bits/byte          Constant tbits/byte
  343: float              Constant tfloat
  344: 1 bits/byte lshift Constant maxbyte
  345: H
  346: 
  347: \ Variables                                            06oct92py
  348: 
  349: Variable image
  350: Variable tlast    TNIL tlast !  \ Last name field
  351: Variable tlastcfa \ Last code field
  352: Variable tdoes    \ Resolve does> calls
  353: Variable bit$
  354: 
  355: \ statistics						10jun97jaw
  356: 
  357: Variable headers-named 0 headers-named !
  358: Variable user-vars 0 user-vars !
  359: 
  360: \ Memory initialisation                                05dec92py
  361: 
  362: [IFDEF] Memory \ Memory is a bigFORTH feature
  363:    also Memory
  364:    : initmem ( var len -- )
  365:      2dup swap handle! >r @ r> erase ;
  366:    toss
  367: [ELSE]
  368:    : initmem ( var len -- )
  369:      tuck allocate abort" CROSS: No memory for target"
  370:      ( len var adr ) dup rot !
  371:      ( len adr ) swap erase ;
  372: [THEN]
  373: 
  374: \ MakeKernal                                           12dec92py
  375: 
  376: : makekernel ( targetsize -- targetsize )
  377:   bit$  over 1- tcell>bit rshift 1+ initmem
  378:   image over initmem ;
  379: 
  380: >MINIMAL
  381: : makekernel makekernel ;
  382: 
  383: 
  384: >CROSS
  385: 
  386: \ \ memregion.fs
  387: 
  388: 
  389: Variable last-defined-region    \ pointer to last defined region
  390: Variable region-link            \ linked list with all regions
  391: Variable mirrored-link          \ linked list for mirrored regions
  392: 0 dup mirrored-link ! region-link !
  393: 
  394: 
  395: : >rdp 2 cells + ;
  396: : >rlen cell+ ;
  397: : >rstart ;
  398: 
  399: 
  400: : region ( addr len -- )                \G create a new region
  401:   \ check whether predefined region exists 
  402:   save-input bl word find >r >r restore-input throw r> r> 0= 
  403:   IF	\ make region
  404: 	drop
  405: 	save-input create restore-input throw
  406: 	here last-defined-region !
  407: 	over ( startaddr ) , ( length ) , ( dp ) ,
  408: 	region-link linked name string,
  409:   ELSE	\ store new parameters in region
  410:         bl word drop
  411: 	>body >r r@ last-defined-region !
  412: 	r@ cell+ ! dup r@ ! r> 2 cells + !
  413:   THEN ;
  414: 
  415: : borders ( region -- startaddr endaddr ) \G returns lower and upper region border
  416:   dup @ swap cell+ @ over + ;
  417: 
  418: : extent  ( region -- startaddr len )   \G returns the really used area
  419:   dup @ swap 2 cells + @ over - ;
  420: 
  421: : area ( region -- startaddr totallen ) \G returns the total area
  422:   dup @ swap cell+ @ ;
  423: 
  424: : mirrored                              \G mark a region as mirrored
  425:   mirrored-link
  426:   linked last-defined-region @ , ;
  427: 
  428: : .addr
  429:   base @ >r hex
  430:   tcell 2 u>
  431:   IF s>d <# # # # # '. hold # # # # #> type
  432:   ELSE s>d <# # # # # # #> type
  433:   THEN r> base ! ;
  434: 
  435: : .regions                      \G display region statistic
  436: 
  437:   \ we want to list the regions in the right order
  438:   \ so first collect all regions on stack
  439:   0 region-link @
  440:   BEGIN dup WHILE dup @ REPEAT drop
  441:   BEGIN dup
  442:   WHILE cr 3 cells - >r
  443: 	r@ 4 cells + count tuck type
  444:         12 swap - 0 max spaces space
  445: 	." Start: " r@ @ dup .addr space
  446: 	." End: " r@ 1 cells + @ + .addr space
  447: 	." DP: " r> 2 cells + @ .addr 
  448:   REPEAT drop
  449:   s" rom" T $has? H 0= ?EXIT
  450:   cr ." Mirrored:"
  451:   mirrored-link @
  452:   BEGIN dup
  453:   WHILE	space dup cell+ @ 4 cells + count type @
  454:   REPEAT drop cr
  455:   ;
  456: 
  457: \ -------- predefined regions
  458: 
  459: 0 0 region address-space
  460: \ total memory addressed and used by the target system
  461: 
  462: 0 0 region dictionary
  463: \ rom area for the compiler
  464: 
  465: T has? rom H
  466: [IF]
  467: 0 0 region ram-dictionary mirrored
  468: \ ram area for the compiler
  469: [ELSE]
  470: ' dictionary ALIAS ram-dictionary
  471: [THEN]
  472: 
  473: 0 0 region return-stack
  474: 
  475: 0 0 region data-stack
  476: 
  477: 0 0 region tib-region
  478: 
  479: ' dictionary ALIAS rom-dictionary
  480: 
  481: 
  482: : setup-target ( -- )   \G initialize targets memory space
  483:   s" rom" T $has? H
  484:   IF  \ check for ram and rom...
  485:       address-space area nip
  486:       ram-dictionary area nip
  487:       rom-dictionary area nip
  488:       and and 0=
  489:       ABORT" CROSS: define address-space, rom- , ram-dictionary, with rom-support!"
  490:   THEN
  491:   address-space area nip
  492:   IF
  493:       address-space area
  494:   ELSE
  495:       dictionary area
  496:   THEN
  497:   dup 0=
  498:   ABORT" CROSS: define at least address-space or dictionary!!"
  499:   + makekernel drop ;
  500: 
  501: \ \ switched tdp for rom support				03jun97jaw
  502: 
  503: \ second value is here to store some maximal value for statistics
  504: \ tempdp is also embedded here but has nothing to do with rom support
  505: \ (needs switched dp)
  506: 
  507: variable tempdp	0 ,	\ temporary dp for resolving
  508: variable tempdp-save
  509: 
  510: 0 [IF]
  511: variable romdp 0 ,      \ Dictionary-Pointer for ramarea
  512: variable ramdp 0 ,      \ Dictionary-Pointer for romarea
  513: 
  514: \
  515: variable sramdp		\ start of ram-area for forth
  516: variable sromdp		\ start of rom-area for forth
  517: 
  518: [THEN]
  519: 
  520: 
  521: 0 value tdp
  522: variable fixed		\ flag: true: no automatic switching
  523: 			\	false: switching is done automatically
  524: 
  525: \ Switch-Policy:
  526: \
  527: \ a header is always compiled into rom
  528: \ after a created word (create and variable) compilation goes to ram
  529: \
  530: \ Be careful: If you want to make the data behind create into rom
  531: \ you have to put >rom before create!
  532: 
  533: variable constflag constflag off
  534: 
  535: : (switchram)
  536:   fixed @ ?EXIT s" rom" T $has? H 0= ?EXIT
  537:   ram-dictionary >rdp to tdp ;
  538: 
  539: : switchram
  540:   constflag @
  541:   IF constflag off ELSE (switchram) THEN ;
  542: 
  543: : switchrom
  544:   fixed @ ?EXIT rom-dictionary >rdp to tdp ;
  545: 
  546: : >tempdp ( addr -- ) 
  547:   tdp tempdp-save ! tempdp to tdp tdp ! ;
  548: : tempdp> ( -- )
  549:   tempdp-save @ to tdp ;
  550: 
  551: : >ram  fixed off (switchram) fixed on ;
  552: : >rom  fixed off switchrom fixed on ;
  553: : >auto fixed off switchrom ;
  554: 
  555: 
  556: 
  557: \ : romstart dup sromdp ! romdp ! ;
  558: \ : ramstart dup sramdp ! ramdp ! ;
  559: 
  560: \ default compilation goed to rom
  561: \ when romable support is off, only the rom switch is used (!!)
  562: >auto
  563: 
  564: : there  tdp @ ;
  565: 
  566: >TARGET
  567: 
  568: \ \ Target Memory Handling
  569: 
  570: \ Byte ordering and cell size                          06oct92py
  571: 
  572: : cell+         tcell + ;
  573: : cells         tcell<< lshift ;
  574: : chars         ;
  575: : char+		1 + ;
  576: : floats	tfloat * ;
  577:     
  578: >CROSS
  579: : cell/         tcell<< rshift ;
  580: >TARGET
  581: 20 CONSTANT bl
  582: \ TNIL Constant NIL
  583: 
  584: >CROSS
  585: 
  586: bigendian
  587: [IF]
  588:    : S!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
  589:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
  590:    : S@  ( addr -- n )  >r 0 0 r> tcell bounds
  591:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
  592: [ELSE]
  593:    : S!  ( n addr -- )  >r s>d r> tcell bounds
  594:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
  595:    : S@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
  596:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
  597: [THEN]
  598: 
  599: >CROSS
  600: \ Bit string manipulation                               06oct92py
  601: \                                                       9may93jaw
  602: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  603: : bits ( n -- n ) chars Bittable + c@ ;
  604: 
  605: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  606: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  607: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  608: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  609: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  610: 
  611: \ Target memory access                                 06oct92py
  612: 
  613: : align+  ( taddr -- rest )
  614:     tcell tuck 1- and - [ tcell 1- ] Literal and ;
  615: : cfalign+  ( taddr -- rest )
  616:     \ see kernel.fs:cfaligned
  617:     /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;
  618: 
  619: >TARGET
  620: : aligned ( taddr -- ta-addr )  dup align+ + ;
  621: \ assumes cell alignment granularity (as GNU C)
  622: 
  623: : cfaligned ( taddr1 -- taddr2 )
  624:     \ see kernel.fs
  625:     dup cfalign+ + ;
  626: 
  627: >CROSS
  628: : >image ( taddr -- absaddr )  image @ + ;
  629: >TARGET
  630: : @  ( taddr -- w )     >image S@ ;
  631: : !  ( w taddr -- )     >image S! ;
  632: : c@ ( taddr -- char )  >image c@ ;
  633: : c! ( char taddr -- )  >image c! ;
  634: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  635: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  636: 
  637: \ Target compilation primitives                        06oct92py
  638: \ included A!                                          16may93jaw
  639: 
  640: : here  ( -- there )    there ;
  641: : allot ( n -- )        tdp +! ;
  642: : ,     ( w -- )        T here H tcell T allot  ! H T here drop H ;
  643: : c,    ( char -- )     T here    1 allot c! H ;
  644: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  645: : cfalign ( -- )
  646:     T here H cfalign+ 0 ?DO  bl T c, H LOOP ;
  647: 
  648: : A!                    dup relon T ! H ;
  649: : A,    ( w -- )        T here H relon T , H ;
  650: 
  651: >CROSS
  652: 
  653: : tcmove ( source dest len -- )
  654: \G cmove in target memory
  655:   bounds
  656:   ?DO  dup T c@ H I T c! H 1+
  657:   LOOP  drop ;
  658: 
  659: >TARGET
  660: H also Forth definitions \ ." asm: " order
  661: 
  662: : X 	also target bl word find
  663: 	IF	state @ IF compile,
  664: 		ELSE execute THEN
  665: 	ELSE	previous ABORT" Cross: access method not supported!"
  666: 	THEN 
  667: 	previous ; immediate
  668: 
  669: [IFDEF] asm-include asm-include [THEN] hex
  670: 
  671: previous
  672: >CROSS H
  673: 
  674: \ \ --------------------        Compiler Plug Ins               01aug97jaw
  675: 
  676: \  Compiler States
  677: 
  678: Variable comp-state
  679: 0 Constant interpreting
  680: 1 Constant compiling
  681: 2 Constant resolving
  682: 3 Constant assembling
  683: 
  684: Defer lit, ( n -- )
  685: Defer alit, ( n -- )
  686: 
  687: Defer branch, ( target-addr -- )	\ compiles a branch
  688: Defer ?branch, ( target-addr -- )	\ compiles a ?branch
  689: Defer branchmark, ( -- branch-addr )	\ reserves room for a branch
  690: Defer ?branchmark, ( -- branch-addr )	\ reserves room for a ?branch
  691: Defer ?domark, ( -- branch-addr )	\ reserves room for a ?do branch
  692: Defer branchto, ( -- )			\ actual program position is target of a branch (do e.g. alignment)
  693: Defer branchtoresolve, ( branch-addr -- ) \ resolves a forward reference from branchmark
  694: Defer branchfrom, ( -- )		\ ?!
  695: Defer branchtomark, ( -- target-addr )	\ marks a branch destination
  696: 
  697: Defer colon, ( tcfa -- )		\ compiles call to tcfa at current position
  698: Defer colonmark, ( -- addr )		\ marks a colon call
  699: Defer colon-resolve ( tcfa addr -- )
  700: 
  701: Defer addr-resolve ( target-addr addr -- )
  702: Defer doer-resolve ( ghost res-pnt target-addr addr -- ghost res-pnt )
  703: 
  704: Defer do,	( -- do-token )
  705: Defer ?do,	( -- ?do-token )
  706: Defer for,	( -- for-token )
  707: Defer loop,	( do-token / ?do-token -- )
  708: Defer +loop,	( do-token / ?do-token -- )
  709: Defer next,	( for-token )
  710: 
  711: [IFUNDEF] ca>native
  712: defer ca>native	
  713: [THEN]
  714: 
  715: >TARGET
  716: DEFER >body             \ we need the system >body
  717: 			\ and the target >body
  718: >CROSS
  719: T 2 cells H VALUE xt>body
  720: DEFER doprim,	\ compiles start of a primitive
  721: DEFER docol,   	\ compiles start of a colon definition
  722: DEFER doer,		
  723: DEFER fini,      \ compiles end of definition ;s
  724: DEFER doeshandler,
  725: DEFER dodoes,
  726: 
  727: DEFER ]comp     \ starts compilation
  728: DEFER comp[     \ ends compilation
  729: 
  730: : (cc) T a, H ;					' (cc) IS colon,
  731: 
  732: : (cr) >tempdp ]comp colon, comp[ tempdp> ; 	' (cr) IS colon-resolve
  733: : (ar) T ! H ;					' (ar) IS addr-resolve
  734: : (dr)  ( ghost res-pnt target-addr addr )
  735: 	>tempdp drop over 
  736: 	dup >magic @ <do:> =
  737: 	IF 	doer,
  738: 	ELSE	dodoes,
  739: 	THEN 
  740: 	tempdp> ;				' (dr) IS doer-resolve
  741: 
  742: : (cm) ( -- addr )
  743:     T here align H
  744:     -1 colon, ;					' (cm) IS colonmark,
  745: 
  746: >TARGET
  747: : compile, colon, ;
  748: >CROSS
  749: 
  750: \ file loading
  751: 
  752: : >fl-id   1 cells + ;
  753: : >fl-name 2 cells + ;
  754: 
  755: Variable filelist 0 filelist !
  756: 0 Value	 filemem
  757: : loadfile filemem >fl-name ;
  758: 
  759: 1 [IF] \ !! JAW WIP
  760: 
  761: : add-included-file ( adr len -- )
  762: 	dup char+ >fl-name allocate throw >r
  763: 	r@ >fl-name place
  764: 	filelist @ r@ !
  765: 	r> dup filelist ! to FileMem
  766: 	;
  767: 
  768: : included? ( c-addr u -- f )
  769:   	filelist
  770: 	BEGIN	@ dup
  771: 	WHILE	>r r@ 1 cells + count compare 0=
  772: 		IF rdrop 2drop true EXIT THEN
  773: 		r>
  774: 	REPEAT
  775: 	2drop drop false ;	
  776: 
  777: : included 
  778: \	cr ." Including: " 2dup type ." ..."
  779: 	FileMem >r
  780: 	2dup add-included-file included 
  781: 	r> to FileMem ;
  782: 
  783: : include bl word count included ;
  784: 
  785: : require bl word count included ;
  786: 
  787: [THEN]
  788: 
  789: \ resolve structure
  790: 
  791: : >next ;		\ link to next field
  792: : >tag cell+ ;		\ indecates type of reference: 0: call, 1: address, 2: doer
  793: : >taddr cell+ cell+ ;	
  794: : >ghost 3 cells + ;
  795: : >file 4 cells + ;
  796: : >line 5 cells + ;
  797: 
  798: : (refered) ( ghost addr tag -- )
  799: \G creates a reference to ghost at address taddr
  800:     rot >r here r@ >link @ , r> >link ! 
  801:     ( taddr tag ) ,
  802:     ( taddr ) , 
  803:     last-header-ghost @ , 
  804:     loadfile , 
  805:     sourceline# , 
  806:   ;
  807: 
  808: : refered ( ghost tag -- )
  809: \G creates a resolve structure
  810:     T here aligned H swap (refered)
  811:   ;
  812: 
  813: : killref ( addr ghost -- )
  814: \G kills a forward reference to ghost at position addr
  815: \G this is used to eleminate a :dovar refence after making a DOES>
  816:     dup >magic @ <fwd> <> IF 2drop EXIT THEN
  817:     swap >r >link
  818:     BEGIN dup @ dup  ( addr last this )
  819:     WHILE dup >taddr @ r@ =
  820:  	 IF   @ over !
  821: 	 ELSE nip THEN
  822:     REPEAT rdrop 2drop 
  823:   ;
  824: 
  825: Defer resolve-warning
  826: 
  827: : reswarn-test ( ghost res-struct -- ghost res-struct )
  828:   over cr ." Resolving " >ghostname type dup ."  in " >ghost @ >ghostname type ;
  829: 
  830: : reswarn-forward ( ghost res-struct -- ghost res-struct )
  831:   over warnhead >ghostname type dup ."  is referenced in " 
  832:   >ghost @ >ghostname type ;
  833: 
  834: \ ' reswarn-test IS resolve-warning
  835:  
  836: \ resolve                                              14oct92py
  837: 
  838:  : resolve-loop ( ghost resolve-list tcfa -- )
  839:     >r
  840:     BEGIN dup WHILE 
  841: \  	  dup >tag @ 2 = IF reswarn-forward THEN
  842: 	  resolve-warning 
  843: 	  r@ over >taddr @ 
  844: 	  2 pick >tag @
  845: 	  CASE	0 OF colon-resolve ENDOF
  846: 		1 OF addr-resolve ENDOF
  847: 		2 OF doer-resolve ENDOF
  848: 	  ENDCASE
  849: 	  @ \ next list element
  850:     REPEAT 2drop rdrop 
  851:   ;
  852: 
  853: \ : resolve-loop ( ghost tcfa -- ghost tcfa )
  854: \  >r dup >link @
  855: \  BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  856: 
  857: \ exists                                                9may93jaw
  858: 
  859: Variable TWarnings
  860: TWarnings on
  861: Variable Exists-Warnings
  862: Exists-Warnings on
  863: 
  864: : exists ( ghost tcfa -- )
  865:   over GhostNames
  866:   BEGIN @ dup
  867:   WHILE 2dup cell+ @ =
  868:   UNTIL
  869:         2 cells + count
  870:         TWarnings @ Exists-Warnings @ and
  871:         IF warnhead type ."  exists"
  872:         ELSE 2drop THEN
  873:         drop swap >link !
  874:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  875:   THEN ;
  876: 
  877: : resolve  ( ghost tcfa -- )
  878: \G resolve referencies to ghost with tcfa
  879:     \ is ghost resolved?, second resolve means another definition with the
  880:     \ same name
  881:     over forward? 0= IF  exists EXIT THEN
  882:     \ get linked-list
  883:     swap >r r@ >link @ swap \ ( list tcfa R: ghost )
  884:     \ mark ghost as resolved
  885:     dup r@ >link ! <res> r@ >magic !
  886:     \ loop through forward referencies
  887:     r> -rot 
  888:     comp-state @ >r Resolving comp-state !
  889:     resolve-loop 
  890:     r> comp-state !
  891: 
  892:     ['] noop IS resolve-warning 
  893:   ;
  894: 
  895: \ gexecute ghost,                                      01nov92py
  896: 
  897: : is-forward   ( ghost -- )
  898:   colonmark, 0 (refered) ; \ compile space for call
  899: 
  900: : is-resolved   ( ghost -- )
  901:   >link @ colon, ; \ compile-call
  902: 
  903: : gexecute   ( ghost -- )
  904:   dup @ <fwd> = IF  is-forward  ELSE  is-resolved  THEN ;
  905: 
  906: : addr,  ( ghost -- )
  907:   dup @ <fwd> = IF  1 refered 0 T a, H ELSE >link @ T a, H THEN ;
  908: 
  909: \ !! : ghost,     ghost  gexecute ;
  910: 
  911: \ .unresolved                                          11may93jaw
  912: 
  913: variable ResolveFlag
  914: 
  915: \ ?touched                                             11may93jaw
  916: 
  917: : ?touched ( ghost -- flag ) dup forward? swap >link @
  918:                                0 <> and ;
  919: 
  920: : .forwarddefs ( ghost -- )
  921: 	."  appeared in:"
  922: 	>link
  923: 	BEGIN	@ dup
  924: 	WHILE	cr 5 spaces
  925: 		dup >ghost @ >ghostname type
  926: 		."  file " dup >file @ ?dup IF count type ELSE ." CON" THEN
  927: 		."  line " dup >line @ .dec
  928: 	REPEAT 
  929: 	drop ;
  930: 
  931: : ?resolved  ( ghostname -- )
  932:   dup cell+ @ ?touched
  933:   IF  	dup 
  934: 	cell+ cell+ count cr type ResolveFlag on 
  935: 	cell+ @ .forwarddefs
  936:   ELSE 	drop 
  937:   THEN ;
  938: 
  939: >MINIMAL
  940: : .unresolved  ( -- )
  941:   ResolveFlag off cr ." Unresolved: "
  942:   Ghostnames
  943:   BEGIN @ dup
  944:   WHILE dup ?resolved
  945:   REPEAT drop ResolveFlag @
  946:   IF
  947:       -1 abort" Unresolved words!"
  948:   ELSE
  949:       ." Nothing!"
  950:   THEN
  951:   cr ;
  952: 
  953: : .stats
  954:   base @ >r decimal
  955:   cr ." named Headers: " headers-named @ . 
  956:   r> base ! ;
  957: 
  958: >CROSS
  959: \ Header states                                        12dec92py
  960: 
  961: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  962: 
  963: VARIABLE ^imm
  964: 
  965: >TARGET
  966: : immediate     40 flag!
  967:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  968:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  969:                 <imm> ^imm @ ! ;
  970: : restrict      20 flag! ;
  971: 
  972: : isdoer	
  973: \G define a forth word as doer, this makes obviously only sence on
  974: \G forth processors such as the PSC1000
  975: 		<do:> last-header-ghost @ >magic ! ;
  976: >CROSS
  977: 
  978: \ ALIAS2 ansforth conform alias                          9may93jaw
  979: 
  980: : ALIAS2 create here 0 , DOES> @ execute ;
  981: \ usage:
  982: \ ' <name> alias2 bla !
  983: 
  984: \ Target Header Creation                               01nov92py
  985: 
  986: >TARGET
  987: : string,  ( addr count -- )
  988:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  989: : name,  ( "name" -- )  bl word count T string, cfalign H ;
  990: : view,   ( -- ) ( dummy ) ;
  991: >CROSS
  992: 
  993: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  994: 
  995: s" ./doc/crossdoc.fd" r/w create-file throw value doc-file-id
  996: \ contains the file-id of the documentation file
  997: 
  998: : T-\G ( -- )
  999:     source >in @ /string doc-file-id write-line throw
 1000:     postpone \ ;
 1001: 
 1002: Variable to-doc  to-doc on
 1003: 
 1004: : cross-doc-entry  ( -- )
 1005:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
 1006:     IF
 1007: 	s" " doc-file-id write-line throw
 1008: 	s" make-doc " doc-file-id write-file throw
 1009: 	tlast @ >image count $1F and doc-file-id write-file throw
 1010: 	>in @
 1011: 	[char] ( parse 2drop
 1012: 	[char] ) parse doc-file-id write-file throw
 1013: 	s"  )" doc-file-id write-file throw
 1014: 	[char] \ parse 2drop					
 1015: 	T-\G
 1016: 	>in !
 1017:     THEN ;
 1018: 
 1019: \ Target TAGS creation
 1020: 
 1021: s" kernel.TAGS" r/w create-file throw value tag-file-id
 1022: \ contains the file-id of the tags file
 1023: 
 1024: Create tag-beg 2 c,  7F c, bl c,
 1025: Create tag-end 2 c,  bl c, 01 c,
 1026: Create tag-bof 1 c,  0C c,
 1027: 
 1028: 2variable last-loadfilename 0 0 last-loadfilename 2!
 1029: 	    
 1030: : put-load-file-name ( -- )
 1031:     loadfilename 2@ last-loadfilename 2@ d<>
 1032:     IF
 1033: 	tag-bof count tag-file-id write-line throw
 1034: 	sourcefilename 2dup
 1035: 	tag-file-id write-file throw
 1036: 	last-loadfilename 2!
 1037: 	s" ,0" tag-file-id write-line throw
 1038:     THEN ;
 1039: 
 1040: : cross-tag-entry  ( -- )
 1041:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
 1042:     IF
 1043: 	put-load-file-name
 1044: 	source >in @ min tag-file-id write-file throw
 1045: 	tag-beg count tag-file-id write-file throw
 1046: 	tlast @ >image count $1F and tag-file-id write-file throw
 1047: 	tag-end count tag-file-id write-file throw
 1048: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
 1049: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
 1050: 	s" ,0" tag-file-id write-line throw
 1051: 	base !
 1052:     THEN ;
 1053: 
 1054: \ Check for words
 1055: 
 1056: Defer skip? ' false IS skip?
 1057: 
 1058: : defined? ( -- flag ) \ name
 1059:     ghost forward? 0= ;
 1060: 
 1061: : needed? ( -- flag ) \ name
 1062: \G returns a false flag when
 1063: \G a word is not defined
 1064: \G a forward reference exists
 1065: \G so the definition is not skipped!
 1066:     bl word gfind
 1067:     IF dup forward?
 1068: 	nip
 1069: 	0=
 1070:     ELSE  drop true  THEN ;
 1071: 
 1072: : doer? ( -- flag ) \ name
 1073:     ghost >magic @ <do:> = ;
 1074: 
 1075: : skip-defs ( -- )
 1076:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
 1077: 
 1078: \ Target header creation
 1079: 
 1080: Variable CreateFlag
 1081: CreateFlag off
 1082: 
 1083: Variable NoHeaderFlag
 1084: NoHeaderFlag off
 1085: 
 1086: : 0.r ( n1 n2 -- ) 
 1087:     base @ >r hex 
 1088:     0 swap <# 0 ?DO # LOOP #> type 
 1089:     r> base ! ;
 1090: : .sym
 1091:   bounds 
 1092:   DO I c@ dup
 1093: 	CASE	'/ OF drop ." \/" ENDOF
 1094: 		'\ OF drop ." \\" ENDOF
 1095: 		dup OF emit ENDOF
 1096: 	ENDCASE
 1097:     LOOP ;
 1098: 
 1099: : (Theader ( "name" -- ghost )
 1100:     \  >in @ bl word count type 2 spaces >in !
 1101:     \ wordheaders will always be compiled to rom
 1102:     switchrom
 1103:     \ build header in target
 1104:     NoHeaderFlag @
 1105:     IF  NoHeaderFlag off
 1106:     ELSE
 1107: 	T align H view,
 1108: 	tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
 1109: 	1 headers-named +!	\ Statistic
 1110: 	>in @ T name, H >in !
 1111:     THEN
 1112:     T cfalign here H tlastcfa !
 1113:     \ Symbol table
 1114: \    >in @ cr ." sym:s/CFA=" there 4 0.r ." /"  bl word count .sym ." /g" cr >in !
 1115:     CreateFlag @
 1116:     IF
 1117: 	>in @ alias2 swap >in !         \ create alias in target
 1118: 	>in @ ghost swap >in !
 1119: 	swap also ghosts ' previous swap !     \ tick ghost and store in alias
 1120: 	CreateFlag off
 1121:     ELSE ghost
 1122:     THEN
 1123:     dup Last-Header-Ghost !
 1124:     dup >magic ^imm !     \ a pointer for immediate
 1125:     Already @
 1126:     IF  dup >end tdoes !
 1127:     ELSE 0 tdoes !
 1128:     THEN
 1129:     80 flag!
 1130:     cross-doc-entry cross-tag-entry ;
 1131: 
 1132: VARIABLE ;Resolve 1 cells allot
 1133: \ this is the resolver information from ":"
 1134: \ resolving is done by ";"
 1135: 
 1136: : Theader  ( "name" -- ghost )
 1137:   (THeader dup there resolve 0 ;Resolve ! ;
 1138: 
 1139: >TARGET
 1140: : Alias    ( cfa -- ) \ name
 1141:     >in @ skip? IF  2drop  EXIT  THEN  >in !
 1142:     dup 0< s" prims" T $has? H 0= and
 1143:     IF
 1144: 	.sourcepos ." needs prim: " >in @ bl word count type >in ! cr
 1145:     THEN
 1146:     (THeader over resolve T A, H 80 flag! ;
 1147: : Alias:   ( cfa -- ) \ name
 1148:     >in @ skip? IF  2drop  EXIT  THEN  >in !
 1149:     dup 0< s" prims" T $has? H 0= and
 1150:     IF
 1151: 	.sourcepos ." needs doer: " >in @ bl word count type >in ! cr
 1152:     THEN
 1153:     ghost tuck swap resolve <do:> swap >magic ! ;
 1154: >CROSS
 1155: 
 1156: \ Conditionals and Comments                            11may93jaw
 1157: 
 1158: : ;Cond
 1159:   postpone ;
 1160:   swap ! ;  immediate
 1161: 
 1162: : Cond: ( -- ) \ name {code } ;
 1163:   atonce on
 1164:   ghost
 1165:   >exec
 1166:   :NONAME ;
 1167: 
 1168: : restrict? ( -- )
 1169: \ aborts on interprete state - ae
 1170:   state @ 0= ABORT" CROSS: Restricted" ;
 1171: 
 1172: : Comment ( -- )
 1173:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
 1174: 
 1175: Comment (       Comment \
 1176: 
 1177: \ compile                                              10may93jaw
 1178: 
 1179: : compile  ( -- ) \ name
 1180:   restrict?
 1181:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
 1182:   0> ( immediate? )
 1183:   IF    >exec @ compile,
 1184:   ELSE  postpone literal postpone gexecute  THEN ;
 1185:                                         immediate
 1186: 
 1187: : [G'] 
 1188: \G ticks a ghost and returns its address
 1189:   bl word gfind 0= ABORT" CROSS: Ghost don't exists"
 1190:   state @
 1191:   IF   postpone literal
 1192:   THEN ; immediate
 1193: 
 1194: : ghost>cfa
 1195:   dup forward? ABORT" CROSS: forward " >link @ ;
 1196:                
 1197: >TARGET
 1198: 
 1199: : '  ( -- cfa ) 
 1200: \ returns the target-cfa of a ghost
 1201:   bl word gfind 0= ABORT" CROSS: Ghost don't exists"
 1202:   ghost>cfa ;
 1203: 
 1204: Cond: [']  T ' H alit, ;Cond
 1205: 
 1206: >CROSS
 1207: 
 1208: : [T']
 1209: \ returns the target-cfa of a ghost, or compiles it as literal
 1210:   postpone [G'] state @ IF postpone ghost>cfa ELSE ghost>cfa THEN ; immediate
 1211: 
 1212: \ \ threading modell					13dec92py
 1213: \ modularized						14jun97jaw
 1214: 
 1215: : fillcfa   ( usedcells -- )
 1216:   T cells H xt>body swap - 0 ?DO 0 T c, H LOOP ;
 1217: 
 1218: : (>body)   ( cfa -- pfa ) xt>body + ;		' (>body) T IS >body H
 1219: 
 1220: : (doer,)   ( ghost -- ) ]comp gexecute comp[ 1 fillcfa ;   ' (doer,) IS doer,
 1221: 
 1222: : (docol,)  ( -- ) [G'] :docol doer, ;		' (docol,) IS docol,
 1223: 
 1224: : (doprim,) ( -- )
 1225:   there xt>body + ca>native T a, H 1 fillcfa ;	' (doprim,) IS doprim,
 1226: 
 1227: : (doeshandler,) ( -- ) 
 1228:   T cfalign H compile :doesjump T 0 , H ; 	' (doeshandler,) IS doeshandler,
 1229: 
 1230: : (dodoes,) ( does-action-ghost -- )
 1231:   ]comp [G'] :dodoes gexecute comp[
 1232:   addr,
 1233:   T here H tcell - reloff 2 fillcfa ;		' (dodoes,) IS dodoes,
 1234: 
 1235: : (lit,) ( n -- )   compile lit T  ,  H ;	' (lit,) IS lit,
 1236: 
 1237: : (alit,) ( n -- )  lit, T here cell - H relon ;	' (alit,) IS alit,
 1238: 
 1239: : (fini,)         compile ;s ;                ' (fini,) IS fini,
 1240: 
 1241: [IFUNDEF] (code) 
 1242: Defer (code)
 1243: Defer (end-code)
 1244: [THEN]
 1245: 
 1246: >TARGET
 1247: : Code
 1248:   defempty?
 1249:   (THeader there resolve
 1250:   [ T e? prims H 0= [IF] T e? ITC H [ELSE] true [THEN] ] [IF]
 1251:   doprim, 
 1252:   [THEN]
 1253:   depth (code) ;
 1254: 
 1255: : Code:
 1256:   defempty?
 1257:     ghost dup there ca>native resolve  <do:> swap >magic !
 1258:     depth (code) ;
 1259: 
 1260: : end-code
 1261:     (end-code)
 1262:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
 1263:     ELSE true ABORT" CROSS: Stack empty" THEN
 1264:     ;
 1265: 
 1266: Cond: chars ;Cond
 1267: 
 1268: >CROSS
 1269: 
 1270: \ tLiteral                                             12dec92py
 1271: 
 1272: >TARGET
 1273: Cond: \G  T-\G ;Cond
 1274: 
 1275: Cond:  Literal ( n -- )   restrict? lit, ;Cond
 1276: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
 1277: 
 1278: : Char ( "<char>" -- )  bl word char+ c@ ;
 1279: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
 1280: 
 1281: \ some special literals					27jan97jaw
 1282: 
 1283: \ !! Known Bug: Special Literals and plug-ins work only correct
 1284: \ on 16 and 32 Bit Targets and 32 Bit Hosts!
 1285: 
 1286: Cond: MAXU
 1287:   restrict? 
 1288:   tcell 1 cells u> 
 1289:   IF	compile lit tcell 0 ?DO FF T c, H LOOP 
 1290:   ELSE	$ffffffff lit, THEN
 1291:   ;Cond
 1292: 
 1293: Cond: MINI
 1294:   restrict?
 1295:   tcell 1 cells u>
 1296:   IF	compile lit bigendian 
 1297:   	IF	80 T c, H tcell 1 ?DO 0 T c, H LOOP 
 1298:   	ELSE  	tcell 1 ?DO 0 T c, H LOOP 80 T c, H
 1299:   	THEN
 1300:   ELSE	tcell 2 = IF $8000 ELSE $80000000 THEN lit, THEN
 1301:   ;Cond
 1302:  
 1303: Cond: MAXI
 1304:  restrict?
 1305:  tcell 1 cells u>
 1306:  IF	compile lit bigendian 
 1307: 	IF 	7F T c, H tcell 1 ?DO FF T c, H LOOP
 1308: 	ELSE 	tcell 1 ?DO FF T c, H LOOP 7F T c, H
 1309:  	THEN
 1310:  ELSE	tcell 2 = IF $7fff ELSE $7fffffff THEN lit, THEN
 1311:  ;Cond
 1312: 
 1313: >CROSS
 1314: \ Target compiling loop                                12dec92py
 1315: \ ">tib trick thrown out                               10may93jaw
 1316: \ number? defined at the top                           11may93jaw
 1317: 
 1318: \ compiled word might leave items on stack!
 1319: : tcom ( in name -- )
 1320:   gfind  ?dup  IF    0> IF    nip >exec @ execute
 1321:                         ELSE  nip gexecute  THEN EXIT THEN
 1322:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
 1323:                ELSE  2drop >in !
 1324:                ghost gexecute THEN  ;
 1325: 
 1326: >TARGET
 1327: \ : ; DOES>                                            13dec92py
 1328: \ ]                                                     9may93py/jaw
 1329: 
 1330: : ] state on
 1331:     Compiling comp-state !
 1332:     BEGIN
 1333:         BEGIN >in @ bl word
 1334:               dup c@ 0= WHILE 2drop refill 0=
 1335:               ABORT" CROSS: End of file while target compiling"
 1336:         REPEAT
 1337:         tcom
 1338:         state @
 1339:         0=
 1340:     UNTIL ;
 1341: 
 1342: \ by the way: defining a second interpreter (a compiler-)loop
 1343: \             is not allowed if a system should be ans conform
 1344: 
 1345: : : ( -- colon-sys ) \ Name
 1346:   defempty?
 1347:   constflag off \ don't let this flag work over colon defs
 1348: 		\ just to go sure nothing unwanted happens
 1349:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
 1350:   (THeader ;Resolve ! there ;Resolve cell+ !
 1351:   docol, ]comp depth T ] H ;
 1352: 
 1353: : :noname ( -- colon-sys )
 1354:   T cfalign H there docol, 0 ;Resolve ! depth T ] H ;
 1355: 
 1356: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
 1357: 
 1358: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
 1359: 
 1360: >CROSS
 1361: : LastXT ;Resolve @ 0= abort" CROSS: no definition for LastXT"
 1362:          ;Resolve cell+ @ ;
 1363: 
 1364: >TARGET
 1365: 
 1366: Cond: recurse ( -- ) Last-Ghost @ gexecute ;Cond
 1367: 
 1368: Cond: ; ( -- ) restrict?
 1369:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
 1370:                           ELSE true ABORT" CROSS: Stack empty" THEN
 1371:                fini,
 1372:                comp[
 1373:                state off
 1374:                ;Resolve @
 1375:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
 1376: 		Interpreting comp-state !
 1377:                ;Cond
 1378: Cond: [  restrict? state off Interpreting comp-state ! ;Cond
 1379: 
 1380: >CROSS
 1381: 
 1382: Create GhostDummy ghostheader
 1383: <res> GhostDummy >magic !
 1384: 
 1385: : !does ( does-action -- )
 1386: \ !! zusammenziehen und dodoes, machen!
 1387:     tlastcfa @ [G'] :dovar killref
 1388: \    tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
 1389: \ !! geht so nicht, da dodoes, ghost will!
 1390:     GhostDummy >link ! GhostDummy 
 1391:     tlastcfa @ >tempdp dodoes, tempdp> ;
 1392: 
 1393: >TARGET
 1394: Cond: DOES> restrict?
 1395:         compile (does>) doeshandler, 
 1396: 	\ resolve words made by builders
 1397: 	tdoes @ ?dup IF  @ T here H resolve THEN
 1398:         ;Cond
 1399: : DOES> switchrom doeshandler, T here H !does depth T ] H ;
 1400: 
 1401: >CROSS
 1402: \ Creation                                             01nov92py
 1403: 
 1404: \ Builder                                               11may93jaw
 1405: 
 1406: : Builder    ( Create-xt do:-xt "name" -- )
 1407: \ builds up a builder in current vocabulary
 1408: \ create-xt is executed when word is interpreted
 1409: \ do:-xt is executet when the created word from builder is executed
 1410: \ for do:-xt an additional entry after the normal ghost-enrys is used
 1411: 
 1412:   >in @ alias2 swap dup >in ! >r >r
 1413:   Make-Ghost 
 1414:   rot swap >exec dup @ ['] NoExec <>
 1415:   IF 2drop ELSE ! THEN
 1416:   ,
 1417:   r> r> >in !
 1418:   also ghosts ' previous swap ! ;
 1419: \  DOES>  dup >exec @ execute ;
 1420: 
 1421: : gdoes,  ( ghost -- )
 1422: \ makes the codefield for a word that is built
 1423:   >end @ dup forward? 0=
 1424:   IF
 1425: 	dup >magic @ <do:> =
 1426: 	IF 	 doer, 
 1427: 	ELSE	dodoes,
 1428: 	THEN
 1429: 	EXIT
 1430:   THEN
 1431: \  compile :dodoes gexecute
 1432: \  T here H tcell - reloff 
 1433:   2 refered 
 1434:   0 fillcfa
 1435:   ;
 1436: 
 1437: : TCreate ( <name> -- )
 1438:   executed-ghost @
 1439:   CreateFlag on
 1440:   create-forward-warn
 1441:   IF ['] reswarn-forward IS resolve-warning THEN
 1442:   Theader >r dup gdoes,
 1443: \ stores execution symantic in the built word
 1444:   >end @ >exec @ r> >exec ! ;
 1445: 
 1446: : RTCreate ( <name> -- )
 1447: \ creates a new word with code-field in ram
 1448:   executed-ghost @
 1449:   CreateFlag on
 1450:   create-forward-warn
 1451:   IF ['] reswarn-forward IS resolve-warning THEN
 1452:   \ make Alias
 1453:   (THeader there 0 T a, H 80 flag! ( S executed-ghost new-ghost )
 1454:   \ store  poiter to code-field
 1455:   switchram T cfalign H
 1456:   there swap T ! H
 1457:   there tlastcfa ! 
 1458:   dup there resolve 0 ;Resolve !
 1459:   >r dup gdoes,
 1460:   >end @ >exec @ r> >exec ! ;
 1461: 
 1462: : Build:  ( -- [xt] [colon-sys] )
 1463:   :noname postpone TCreate ;
 1464: 
 1465: : BuildSmart:  ( -- [xt] [colon-sys] )
 1466:   :noname
 1467:   [ T has? rom H [IF] ]
 1468:   postpone RTCreate
 1469:   [ [ELSE] ]
 1470:   postpone TCreate 
 1471:   [ [THEN] ] ;
 1472: 
 1473: : gdoes>  ( ghost -- addr flag )
 1474:   executed-ghost @
 1475:   state @ IF  gexecute true EXIT  THEN
 1476:   >link @ T >body H false ;
 1477: 
 1478: \ DO: ;DO                                               11may93jaw
 1479: \ changed to ?EXIT                                      10may93jaw
 1480: 
 1481: : DO:     ( -- addr [xt] [colon-sys] )
 1482:   here ghostheader
 1483:   :noname postpone gdoes> postpone ?EXIT ;
 1484: 
 1485: : by:     ( -- addr [xt] [colon-sys] ) \ name
 1486:   ghost
 1487:   :noname postpone gdoes> postpone ?EXIT ;
 1488: 
 1489: : ;DO ( addr [xt] [colon-sys] -- addr )
 1490:   postpone ;    ( S addr xt )
 1491:   over >exec ! ; immediate
 1492: 
 1493: : by      ( -- addr ) \ Name
 1494:   ghost >end @ ;
 1495: 
 1496: >TARGET
 1497: \ Variables and Constants                              05dec92py
 1498: 
 1499: Build:  ( n -- ) ;
 1500: by: :docon ( ghost -- n ) T @ H ;DO
 1501: Builder (Constant)
 1502: 
 1503: Build:  ( n -- ) T , H ;
 1504: by (Constant)
 1505: Builder Constant
 1506: 
 1507: Build:  ( n -- ) T A, H ;
 1508: by (Constant)
 1509: Builder AConstant
 1510: 
 1511: Build:  ( d -- ) T , , H ;
 1512: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
 1513: Builder 2Constant
 1514: 
 1515: BuildSmart: ;
 1516: by: :dovar ( ghost -- addr ) ;DO
 1517: Builder Create
 1518: 
 1519: T has? rom H [IF]
 1520: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
 1521: by (Constant)
 1522: Builder Variable
 1523: [ELSE]
 1524: Build: T 0 , H ;
 1525: by Create
 1526: Builder Variable
 1527: [THEN]
 1528: 
 1529: T has? rom H [IF]
 1530: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , 0 , H ( switchrom ) ;
 1531: by (Constant)
 1532: Builder 2Variable
 1533: [ELSE]
 1534: Build: T 0 , 0 , H ;
 1535: by Create
 1536: Builder 2Variable
 1537: [THEN]
 1538: 
 1539: T has? rom H [IF]
 1540: Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
 1541: by (Constant)
 1542: Builder AVariable
 1543: [ELSE]
 1544: Build: T 0 A, H ;
 1545: by Create
 1546: Builder AVariable
 1547: [THEN]
 1548: 
 1549: \ User variables                                       04may94py
 1550: 
 1551: >CROSS
 1552: Variable tup  0 tup !
 1553: Variable tudp 0 tudp !
 1554: : u,  ( n -- udp )
 1555:   tup @ tudp @ + T  ! H
 1556:   tudp @ dup T cell+ H tudp ! ;
 1557: : au, ( n -- udp )
 1558:   tup @ tudp @ + T A! H
 1559:   tudp @ dup T cell+ H tudp ! ;
 1560: >TARGET
 1561: 
 1562: Build: T 0 u, , H ;
 1563: by: :douser ( ghost -- up-addr )  T @ H tup @ + ;DO
 1564: Builder User
 1565: 
 1566: Build: T 0 u, , 0 u, drop H ;
 1567: by User
 1568: Builder 2User
 1569: 
 1570: Build: T 0 au, , H ;
 1571: by User
 1572: Builder AUser
 1573: 
 1574: BuildSmart: T , H ;
 1575: by (Constant)
 1576: Builder Value
 1577: 
 1578: BuildSmart: T A, H ;
 1579: by (Constant)
 1580: Builder AValue
 1581: 
 1582: BuildSmart:  ( -- ) [T'] noop T A, H ;
 1583: by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
 1584: Builder Defer
 1585: 
 1586: BuildSmart:  ( inter comp -- ) swap T immediate A, A, H ;
 1587: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
 1588: Builder interpret/compile:
 1589: 
 1590: \ Sturctures                                           23feb95py
 1591: 
 1592: >CROSS
 1593: : nalign ( addr1 n -- addr2 )
 1594: \ addr2 is the aligned version of addr1 wrt the alignment size n
 1595:  1- tuck +  swap invert and ;
 1596: >TARGET
 1597: 
 1598: Build: ;
 1599: by: :dofield T @ H + ;DO
 1600: Builder (Field)
 1601: 
 1602: Build: ( align1 offset1 align size "name" --  align2 offset2 )
 1603:     rot dup T , H ( align1 align size offset1 )
 1604:     + >r nalign r> ;
 1605: by (Field)
 1606: Builder Field
 1607: 
 1608: : struct  T 1 chars 0 H ;
 1609: : end-struct  T 2Constant H ;
 1610: 
 1611: : cell% ( n -- size align )
 1612:     T 1 cells H dup ;
 1613: 
 1614: \ ' 2Constant Alias2 end-struct
 1615: \ 0 1 T Chars H 2Constant struct
 1616: 
 1617: \ structural conditionals                              17dec92py
 1618: 
 1619: >CROSS
 1620: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
 1621: : sys?        ( sys -- sys )    dup 0= ?struc ;
 1622: : >mark       ( -- sys )        T here  ( dup ." M" hex. ) 0 , H ;
 1623: 
 1624: : branchoffset ( src dest -- ) - ;
 1625: 
 1626: : >resolve    ( sys -- )        T here ( dup ." >" hex. ) over branchoffset swap ! H ;
 1627: 
 1628: : <resolve    ( sys -- )        T here ( dup ." <" hex. ) branchoffset , H ;
 1629: 
 1630: :noname compile branch T here branchoffset , H ;
 1631:   IS branch, ( target-addr -- )
 1632: :noname compile ?branch T here branchoffset , H ;
 1633:   IS ?branch, ( target-addr -- )
 1634: :noname compile branch T here 0 , H ;
 1635:   IS branchmark, ( -- branchtoken )
 1636: :noname compile ?branch T here 0 , H ;
 1637:   IS ?branchmark, ( -- branchtoken )
 1638: :noname T here 0 , H ;
 1639:   IS ?domark, ( -- branchtoken )
 1640: :noname dup T @ H ?struc T here over branchoffset swap ! H ;
 1641:   IS branchtoresolve, ( branchtoken -- )
 1642: :noname branchto, T here H ;
 1643:   IS branchtomark, ( -- target-addr )
 1644: 
 1645: >TARGET
 1646: 
 1647: \ Structural Conditionals                              12dec92py
 1648: 
 1649: Cond: BUT       restrict? sys? swap ;Cond
 1650: Cond: YET       restrict? sys? dup ;Cond
 1651: 
 1652: 0 [IF]
 1653: >CROSS
 1654: Variable tleavings
 1655: >TARGET
 1656: 
 1657: Cond: DONE   ( addr -- )  restrict? tleavings @
 1658:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
 1659:       tleavings ! drop ;Cond
 1660: 
 1661: >CROSS
 1662: : (leave)  T here H tleavings @ T , H  tleavings ! ;
 1663: >TARGET
 1664: 
 1665: Cond: LEAVE     restrict? compile branch (leave) ;Cond
 1666: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave)  ;Cond
 1667: 
 1668: [ELSE]
 1669:     \ !! This is WIP
 1670:     \ The problem is (?DO)!
 1671:     \ perhaps we need a plug-in for (?DO)
 1672:     
 1673: >CROSS
 1674: Variable tleavings 0 tleavings !
 1675: : (done) ( addr -- )
 1676:     tleavings @
 1677:     BEGIN  dup
 1678:     WHILE
 1679: 	>r dup r@ cell+ @ \ address of branch
 1680: 	u> 0=	   \ lower than DO?	
 1681:     WHILE
 1682: 	r@ 2 cells + @ \ branch token
 1683: 	branchtoresolve,
 1684: 	r@ @ r> free throw
 1685:     REPEAT  r>  THEN
 1686:     tleavings ! drop ;
 1687: 
 1688: >TARGET
 1689: 
 1690: Cond: DONE   ( addr -- )  restrict? (done) ;Cond
 1691: 
 1692: >CROSS
 1693: : (leave) ( branchtoken -- )
 1694:     3 cells allocate throw >r
 1695:     T here H r@ cell+ !
 1696:     r@ 2 cells + !
 1697:     tleavings @ r@ !
 1698:     r> tleavings ! ;
 1699: >TARGET
 1700: 
 1701: Cond: LEAVE     restrict? branchmark, (leave) ;Cond
 1702: Cond: ?LEAVE    restrict? compile 0=  ?branchmark, (leave)  ;Cond
 1703: 
 1704: [THEN]
 1705: 
 1706: >CROSS
 1707: \ !!JW ToDo : Move to general tools section
 1708: 
 1709: : to1 ( x1 x2 xn n -- addr )
 1710: \G packs n stack elements in a allocated memory region
 1711:    dup dup 1+ cells allocate throw dup >r swap 1+
 1712:    0 DO tuck ! cell+ LOOP
 1713:    drop r> ;
 1714: : 1to ( addr -- x1 x2 xn )
 1715: \G unpacks the elements saved by to1
 1716:     dup @ swap over cells + swap
 1717:     0 DO  dup @ swap 1 cells -  LOOP
 1718:     free throw ;
 1719: 
 1720: : loop]     branchto, dup <resolve tcell - (done) ;
 1721: 
 1722: : skiploop] ?dup IF branchto, branchtoresolve, THEN ;
 1723: 
 1724: >TARGET
 1725: 
 1726: \ Structural Conditionals                              12dec92py
 1727: 
 1728: >TARGET
 1729: Cond: AHEAD     restrict? branchmark, ;Cond
 1730: Cond: IF        restrict? ?branchmark, ;Cond
 1731: Cond: THEN      restrict? sys? branchto, branchtoresolve, ;Cond
 1732: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
 1733: 
 1734: Cond: BEGIN     restrict? branchtomark, ;Cond
 1735: Cond: WHILE     restrict? sys? compile IF swap ;Cond
 1736: Cond: AGAIN     restrict? sys? branch, ;Cond
 1737: Cond: UNTIL     restrict? sys? ?branch, ;Cond
 1738: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
 1739: 
 1740: Cond: CASE      restrict? 0 ;Cond
 1741: Cond: OF        restrict? 1+ >r compile over compile =
 1742:                 compile IF compile drop r> ;Cond
 1743: Cond: ENDOF     restrict? >r compile ELSE r> ;Cond
 1744: Cond: ENDCASE   restrict? compile drop 0 ?DO  compile THEN  LOOP ;Cond
 1745: 
 1746: \ Structural Conditionals                              12dec92py
 1747: 
 1748: :noname
 1749:     0 compile (do)
 1750:     branchtomark,  2 to1 ;
 1751:   IS do, ( -- target-addr )
 1752: 
 1753: \ :noname
 1754: \     compile 2dup compile = compile IF
 1755: \     compile 2drop compile ELSE
 1756: \     compile (do) branchtomark, 2 to1 ;
 1757: \   IS ?do,
 1758:     
 1759: :noname
 1760:     0 compile (?do)  ?domark, (leave)
 1761:     branchtomark,  2 to1 ;
 1762:   IS ?do, ( -- target-addr )
 1763: :noname compile (for) branchtomark, ;
 1764:   IS for, ( -- target-addr )
 1765: :noname 1to compile (loop)  loop] compile unloop skiploop] ;
 1766:   IS loop, ( target-addr -- )
 1767: :noname 1to compile (+loop)  loop] compile unloop skiploop] ;
 1768:   IS +loop, ( target-addr -- )
 1769: :noname compile (next)  loop] compile unloop ;
 1770:   IS next, ( target-addr -- )
 1771: 
 1772: Cond: DO      	restrict? do, ;Cond
 1773: Cond: ?DO     	restrict? ?do, ;Cond
 1774: Cond: FOR	restrict? for, ;Cond
 1775: 
 1776: Cond: LOOP	restrict? sys? loop, ;Cond
 1777: Cond: +LOOP	restrict? sys? +loop, ;Cond
 1778: Cond: NEXT	restrict? sys? next, ;Cond
 1779: 
 1780: \ String words                                         23feb93py
 1781: 
 1782: : ,"            [char] " parse T string, align H ;
 1783: 
 1784: Cond: ."        restrict? compile (.")     T ," H ;Cond
 1785: Cond: S"        restrict? compile (S")     T ," H ;Cond
 1786: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
 1787: 
 1788: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
 1789: : IS            T ' >body ! H ;
 1790: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
 1791: : TO            T ' >body ! H ;
 1792: 
 1793: Cond: defers	T ' >body @ compile, H ;Cond
 1794: : on		T -1 swap ! H ; 
 1795: : off   	T 0 swap ! H ;
 1796: 
 1797: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
 1798: 
 1799: \ linked list primitive
 1800: : linked        T here over @ A, swap ! H ;
 1801: : chained	T linked A, H ;
 1802: 
 1803: : err"   s" ErrLink linked" evaluate T , H
 1804:          [char] " parse T string, align H ;
 1805: 
 1806: : env"  [char] " parse s" EnvLink linked" evaluate
 1807:         T string, align , H ;
 1808: 
 1809: : 2env" [char] " parse s" EnvLink linked" evaluate
 1810:         here >r T string, align , , H
 1811:         r> dup T c@ H 80 and swap T c! H ;
 1812: 
 1813: \ compile must be last                                 22feb93py
 1814: 
 1815: Cond: compile ( -- ) restrict? \ name
 1816:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
 1817:       0> IF    gexecute
 1818:          ELSE  dup >magic @ <imm> =
 1819:                IF   gexecute
 1820:                ELSE compile (compile) addr, THEN THEN ;Cond
 1821: 
 1822: Cond: postpone ( -- ) restrict? \ name
 1823:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
 1824:       0> IF    gexecute
 1825:          ELSE  dup >magic @ <imm> =
 1826:                IF   gexecute
 1827: 	       ELSE compile (compile) addr, THEN THEN ;Cond
 1828: 	   
 1829: \ \ minimal definitions
 1830: 	   
 1831: >MINIMAL
 1832: also minimal
 1833: \ Usefull words                                        13feb93py
 1834: 
 1835: : KB  400 * ;
 1836: 
 1837: \ \ [IF] [ELSE] [THEN] ...				14sep97jaw
 1838: 
 1839: \ it is useful to define our own structures and not to rely
 1840: \ on the words in the compiler
 1841: \ The words in the compiler might be defined with vocabularies
 1842: \ this doesn't work with our self-made compile-loop
 1843: 
 1844: Create parsed 20 chars allot	\ store word we parsed
 1845: 
 1846: : upcase
 1847:     parsed count bounds
 1848:     ?DO I c@ toupper I c! LOOP ;
 1849: 
 1850: : [ELSE]
 1851:     1 BEGIN
 1852: 	BEGIN bl word count dup WHILE
 1853: 	    comment? parsed place upcase parsed count
 1854: 	    2dup s" [IF]" compare 0= >r 
 1855: 	    2dup s" [IFUNDEF]" compare 0= >r
 1856: 	    2dup s" [IFDEF]" compare 0= r> or r> or
 1857: 	    IF   2drop 1+
 1858: 	    ELSE 2dup s" [ELSE]" compare 0=
 1859: 		IF   2drop 1- dup
 1860: 		    IF 1+
 1861: 		    THEN
 1862: 		ELSE
 1863: 		    2dup s" [ENDIF]" compare 0= >r
 1864: 		    s" [THEN]" compare 0= r> or
 1865: 		    IF 1- THEN
 1866: 		THEN
 1867: 	    THEN
 1868: 	    ?dup 0= ?EXIT
 1869: 	REPEAT
 1870: 	2drop refill 0=
 1871:     UNTIL drop ; immediate
 1872:   
 1873: : [THEN] ( -- ) ; immediate
 1874: 
 1875: : [ENDIF] ( -- ) ; immediate
 1876: 
 1877: : [IF] ( flag -- )
 1878:     0= IF postpone [ELSE] THEN ; immediate 
 1879: 
 1880: Cond: [IF]      postpone [IF] ;Cond
 1881: Cond: [THEN]    postpone [THEN] ;Cond
 1882: Cond: [ELSE]    postpone [ELSE] ;Cond
 1883: 
 1884: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
 1885: 
 1886: : defined? defined? ;
 1887: : needed? needed? ;
 1888: : doer? doer? ;
 1889: 
 1890: \ we want to use IFDEF on compiler directives (e.g. E?) in the source, too
 1891: 
 1892: : directive? 
 1893:   bl word count [ ' target >wordlist ] aliteral search-wordlist 
 1894:   dup IF nip THEN ;
 1895: 
 1896: : [IFDEF]  >in @ directive? swap >in !
 1897: 	   0= IF defined? ELSE name 2drop true THEN
 1898: 	   postpone [IF] ;
 1899: 
 1900: : [IFUNDEF] defined? 0= postpone [IF] ;
 1901: 
 1902: Cond: [IFDEF]   postpone [IFDEF] ;Cond
 1903: 
 1904: Cond: [IFUNDEF] postpone [IFUNDEF] ;Cond
 1905: 
 1906: \ C: \- \+ Conditional Compiling                         09jun93jaw
 1907: 
 1908: : C: >in @ defined? 0=
 1909:      IF    >in ! T : H
 1910:      ELSE drop
 1911:         BEGIN bl word dup c@
 1912:               IF   count comment? s" ;" compare 0= ?EXIT
 1913:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
 1914:               THEN
 1915:         AGAIN
 1916:      THEN ;
 1917: 
 1918: also minimal
 1919: 
 1920: \G doesn't skip line when bit is set in debugmask
 1921: : \D name evaluate debugmasksource @ and 0= IF postpone \ THEN ;
 1922: 
 1923: \G interprets the line if word is not defined
 1924: : \- defined? IF postpone \ THEN ;
 1925: 
 1926: \G interprets the line if word is defined
 1927: : \+ defined? 0= IF postpone \ THEN ;
 1928: 
 1929: Cond: \- \- ;Cond
 1930: Cond: \+ \+ ;Cond
 1931: Cond: \D \D ;Cond
 1932: 
 1933: : ?? bl word find IF execute ELSE drop 0 THEN ;
 1934: 
 1935: : needed:
 1936: \G defines ghost for words that we want to be compiled
 1937:   BEGIN >in @ bl word c@ WHILE >in ! ghost drop REPEAT drop ;
 1938: 
 1939: previous
 1940: 
 1941: \ save-cross                                           17mar93py
 1942: 
 1943: >CROSS
 1944: Create magic  s" Gforth10" here over allot swap move
 1945: 
 1946: char 1 bigendian + tcell + magic 7 + c!
 1947: 
 1948: : save-cross ( "image-name" "binary-name" -- )
 1949:   bl parse ." Saving to " 2dup type cr
 1950:   w/o bin create-file throw >r
 1951:   TNIL IF
 1952:       s" #! "   r@ write-file throw
 1953:       bl parse  r@ write-file throw
 1954:       s"  -i"   r@ write-file throw
 1955:       #lf       r@ emit-file throw
 1956:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
 1957:       ?do
 1958: 	  bl over emit-file throw
 1959:       loop
 1960:       drop
 1961:       magic 8       r@ write-file throw \ write magic
 1962:   ELSE
 1963:       bl parse 2drop
 1964:   THEN
 1965:   image @ there 
 1966:   r@ write-file throw \ write image
 1967:   TNIL IF
 1968:       bit$  @ there 1- tcell>bit rshift 1+
 1969:                 r@ write-file throw \ write tags
 1970:   THEN
 1971:   r> close-file throw ;
 1972: 
 1973: : save-region ( addr len -- )
 1974:   bl parse w/o bin create-file throw >r
 1975:   swap image @ + swap r@ write-file throw
 1976:   r> close-file throw ;
 1977: 
 1978: \ words that should be in minimal
 1979: 
 1980: create s-buffer 50 chars allot
 1981: 
 1982: >MINIMAL
 1983: also minimal
 1984: 
 1985: bigendian Constant bigendian
 1986: : here there ;
 1987: 
 1988: \ compiler directives
 1989: : >ram >ram ;
 1990: : >rom >rom ;
 1991: : >auto >auto ;
 1992: : >tempdp >tempdp ;
 1993: : tempdp> tempdp> ;
 1994: : const constflag on ;
 1995: : warnings name 3 = 0= twarnings ! drop ;
 1996: : | NoHeaderFlag on ;
 1997: 
 1998: : save-cross save-cross ;
 1999: : save-region save-region ;
 2000: : tdump swap >image swap dump ;
 2001: 
 2002: also forth 
 2003: [IFDEF] Label           : Label defempty? Label ; [THEN] 
 2004: [IFDEF] start-macros    : start-macros defempty? start-macros ; [THEN]
 2005: [IFDEF] builttag	: builttag builttag ;	[THEN]
 2006: previous
 2007: 
 2008: : s" [char] " parse s-buffer place s-buffer count ; \ for environment?
 2009: : + + ;
 2010: : 1+ 1 + ;
 2011: : 2+ 2 + ;
 2012: : or or ;
 2013: : 1- 1- ;
 2014: : - - ;
 2015: : and and ;
 2016: : or or ;
 2017: : 2* 2* ;
 2018: : * * ;
 2019: : / / ;
 2020: : dup dup ;
 2021: : over over ;
 2022: : swap swap ;
 2023: : rot rot ;
 2024: : drop drop ;
 2025: : =   = ;
 2026: : 0=   0= ;
 2027: : lshift lshift ;
 2028: : 2/ 2/ ;
 2029: : . . ;
 2030: 
 2031: : all-words    ['] false    IS skip? ;
 2032: : needed-words ['] needed?  IS skip? ;
 2033: : undef-words  ['] defined? IS skip? ;
 2034: 
 2035: : \  postpone \ ;  immediate
 2036: : \G T-\G ; immediate
 2037: : (  postpone ( ;  immediate
 2038: : include bl word count included ;
 2039: : require require ;
 2040: : .( [char] ) parse type ;
 2041: : ." [char] " parse type ;
 2042: : cr cr ;
 2043: 
 2044: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
 2045: only forth also minimal definitions
 2046: 
 2047: \ cross-compiler words
 2048: 
 2049: : decimal       decimal ;
 2050: : hex           hex ;
 2051: 
 2052: : tudp          T tudp H ;
 2053: : tup           T tup H ;
 2054: 
 2055: : doc-off       false T to-doc H ! ;
 2056: : doc-on        true  T to-doc H ! ;
 2057: [IFDEF] dbg : dbg dbg ; [THEN]
 2058: 
 2059: minimal
 2060: 
 2061: \ for debugging...
 2062: : order         order ;
 2063: : hwords         words ;
 2064: : words 	also ghosts words previous ;
 2065: : .s            .s ;
 2066: : bye           bye ;
 2067: 
 2068: \ turnkey direction
 2069: : H forth ; immediate
 2070: : T minimal ; immediate
 2071: : G ghosts ; immediate
 2072: 
 2073: : turnkey  0 set-order also Target definitions
 2074:            also Minimal also ;
 2075: 
 2076: \ these ones are pefered:
 2077: 
 2078: : lock   turnkey ;
 2079: : unlock forth also cross ;
 2080: 
 2081: : [[ also unlock ;
 2082: : ]] previous previous ;
 2083: 
 2084: unlock definitions also minimal
 2085: : lock   lock ;
 2086: lock

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