File:  [gforth] / gforth / cross.fs
Revision 1.9: download - view: text, annotated - select for diffs
Thu Jul 21 10:52:37 1994 UTC (25 years, 4 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Added dictionary hashing
Changed argument interpretation as documented
Made refill for DOS 20 times faster
Added m*/ and missing FP words.

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ $Id: cross.fs,v 1.9 1994/07/21 10:52:37 pazsan Exp $
    3: \ Idea and implementation: Bernd Paysan (py)
    4: \ Copyright 1992 by the ANSI figForth Development Group
    5: 
    6: \ Log:
    7: \       changed in ; [ to state off           12may93jaw
    8: \       included place +place                 12may93jaw
    9: \       for a created word (variable, constant...)
   10: \       is now an alias in the target voabulary.
   11: \       this means it is no longer necessary to
   12: \       switch between vocabularies for variable
   13: \       initialization                        12may93jaw
   14: \       discovered error in DOES>
   15: \       replaced !does with (;code)           16may93jaw
   16: \       made complete redesign and
   17: \       introduced two vocs method
   18: \       to be asure that the right words
   19: \       are found                             08jun93jaw
   20: \       btw:  ! works not with 16 bit
   21: \             targets                         09jun93jaw
   22: \       added: 2user and value                11jun93jaw
   23: 
   24: \ include other.fs       \ ansforth extentions for cross
   25: 
   26: : comment? ( c-addr u -- c-addr u )
   27:         2dup s" (" compare 0=
   28:         IF    postpone (
   29:         ELSE  2dup s" \" compare 0= IF postpone \ THEN
   30:         THEN ;
   31: 
   32: decimal
   33: 
   34: \ Begin CROSS COMPILER:
   35: 
   36: \ GhostNames                                            9may93jaw
   37: \ second name source to search trough list
   38: 
   39: VARIABLE GhostNames
   40: 0 GhostNames !
   41: : GhostName ( -- addr )
   42:         here GhostNames @ , GhostNames ! here 0 ,
   43:         name count
   44: \        2dup type space
   45:         dup c, here over chars allot swap move align ;
   46: 
   47: hex
   48: 
   49: 
   50: Vocabulary Cross
   51: Vocabulary Target
   52: Vocabulary Ghosts
   53: VOCABULARY Minimal
   54: only Forth also Target also also
   55: definitions Forth
   56: 
   57: : T  previous Cross also Target ; immediate
   58: : G  Ghosts ; immediate
   59: : H  previous Forth also Cross ; immediate
   60: 
   61: forth definitions
   62: 
   63: : T  previous Cross also Target ; immediate
   64: : G  Ghosts ; immediate
   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: \ Variables                                            06oct92py
   75: 
   76: -1 Constant NIL
   77: Variable image
   78: Variable tlast    NIL tlast !  \ Last name field
   79: Variable tlastcfa \ Last code field
   80: Variable tdoes    \ Resolve does> calls
   81: Variable bit$
   82: Variable tdp
   83: : there  tdp @ ;
   84: 
   85: \ Parameter for target systems                         06oct92py
   86: 
   87: include machine.fs
   88: 
   89: >TARGET
   90: 
   91: \ Byte ordering and cell size                          06oct92py
   92: 
   93: : cell+         cell + ;
   94: : cells         cell<< lshift ;
   95: : chars         ;
   96: : floats	float * ;
   97:     
   98: >CROSS
   99: : cell/         cell<< rshift ;
  100: >TARGET
  101: 20 CONSTANT bl
  102: -1 Constant NIL
  103: -2 Constant :docol
  104: -3 Constant :docon
  105: -4 Constant :dovar
  106: -5 Constant :douser
  107: -6 Constant :dodoes
  108: -7 Constant :doesjump
  109: 
  110: >CROSS
  111: 
  112: endian  0 pad ! -1 pad c! pad @ 0<
  113: = [IF]   : bswap ; immediate 
  114: [ELSE]   : bswap ( big / little -- little / big )  0
  115:            cell 1- FOR  bits/byte lshift over
  116:                         [ 1 bits/byte lshift 1- ] Literal and or
  117:                         swap bits/byte rshift swap  NEXT  nip ;
  118: [THEN]
  119: 
  120: \ Memory initialisation                                05dec92py
  121: \ Fixed bug in else part                               11may93jaw
  122: 
  123: [IFDEF] Memory \ Memory is a bigFORTH feature
  124:    also Memory
  125:    : initmem ( var len -- )
  126:      2dup swap handle! >r @ r> erase ;
  127:    toss
  128: [ELSE]
  129:    : initmem ( var len -- )
  130:      tuck allocate abort" CROSS: No memory for target"
  131:      ( len var adr ) dup rot !
  132:      ( len adr ) swap erase ;
  133: [THEN]
  134: 
  135: \ MakeKernal                                           12dec92py
  136: 
  137: >MINIMAL
  138: : makekernal ( targetsize -- targetsize )
  139:   bit$  over 1- cell>bit rshift 1+ initmem
  140:   image over initmem tdp off ;
  141: 
  142: >CROSS
  143: \ Bit string manipulation                               06oct92py
  144: \                                                       9may93jaw
  145: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  146: : bits ( n -- n ) chars Bittable + c@ ;
  147: 
  148: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  149: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  150: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  151: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  152: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  153: 
  154: \ Target memory access                                 06oct92py
  155: 
  156: : align+  ( taddr -- rest )
  157:     cell tuck 1- and - [ cell 1- ] Literal and ;
  158: 
  159: >TARGET
  160: : aligned ( taddr -- ta-addr )  dup align+ + ;
  161: \ assumes cell alignment granularity (as GNU C)
  162: 
  163: >CROSS
  164: : >image ( taddr -- absaddr )  image @ + ;
  165: >TARGET
  166: : @  ( taddr -- w )     >image @ bswap ;
  167: : !  ( w taddr -- )     >r bswap r> >image ! ;
  168: : c@ ( taddr -- char )  >image c@ ;
  169: : c! ( char taddr -- )  >image c! ;
  170: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  171: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  172: 
  173: \ Target compilation primitives                        06oct92py
  174: \ included A!                                          16may93jaw
  175: 
  176: : here  ( -- there )    there ;
  177: : allot ( n -- )        tdp +! ;
  178: : ,     ( w -- )        T here H cell T allot  ! H ;
  179: : c,    ( char -- )     T here    1 allot c! H ;
  180: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  181: 
  182: : A!                    dup relon T ! H ;
  183: : A,    ( w -- )        T here H relon T , H ;
  184: 
  185: >CROSS
  186: 
  187: \ threading modell                                     13dec92py
  188: 
  189: \ generic threading modell
  190: : docol,  ( -- ) :docol T A, 0 , H ;
  191: 
  192: >TARGET
  193: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  194: >CROSS
  195: 
  196: : dodoes, ( -- ) T :doesjump A, 0 , H ;
  197: 
  198: \ Ghost Builder                                        06oct92py
  199: 
  200: \ <T T> new version with temp variable                 10may93jaw
  201: 
  202: VARIABLE VocTemp
  203: 
  204: : <T  get-current VocTemp ! also Ghosts definitions ;
  205: : T>  previous VocTemp @ set-current ;
  206: 
  207: 4711 Constant <fwd>             4712 Constant <res>
  208: 4713 Constant <imm>
  209: 
  210: \ iForth makes only immediate directly after create
  211: \ make atonce trick! ?
  212: 
  213: Variable atonce atonce off
  214: 
  215: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  216: 
  217: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  218: 
  219: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
  220: : >end 3 cells + ;
  221: 
  222: : Make-Ghost ( "name" -- ghost )
  223:   >in @ GhostName swap >in !
  224:   <T Create atonce @ IF immediate atonce off THEN
  225:   here tuck swap ! ghostheader T>
  226:   DOES>  >exec @ execute ;
  227: 
  228: \ ghost words                                          14oct92py
  229: \                                          changed:    10may93py/jaw
  230: 
  231: : gfind   ( string -- ghost true/1 / string false )
  232: \ searches for string in word-list ghosts
  233: \ !! wouldn't it be simpler to just use search-wordlist ? ae
  234:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  235: \ >r get-order  0 set-order also ghosts  r> find >r >r
  236:   >r r@ IF  >body nip  THEN  r> ;
  237: \ set-order  r> r@  IF  >body  THEN  r> ;
  238: 
  239: VARIABLE Already
  240: 
  241: : ghost   ( "name" -- ghost )
  242:   Already off
  243:   >in @  name gfind   IF  Already on nip EXIT  THEN
  244:   drop  >in !  Make-Ghost ;
  245: 
  246: \ resolve                                              14oct92py
  247: 
  248: : resolve-loop ( ghost tcfa -- ghost tcfa )
  249:   >r dup >link @
  250:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  251: 
  252: \ exists                                                9may93jaw
  253: 
  254: : exists ( ghost tcfa -- )
  255:   over GhostNames
  256:   BEGIN @ dup
  257:   WHILE 2dup cell+ @ =
  258:   UNTIL
  259:         nip 2 cells + count cr ." CROSS: Exists: " type 4 spaces
  260:         swap cell+ !
  261:   ELSE true ABORT" CROSS: Ghostnames inconsistent"
  262:   THEN ;
  263: 
  264: : resolve  ( ghost tcfa -- )
  265:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  266:   resolve-loop  over >link ! <res> swap >magic ! ;
  267: 
  268: \ gexecute ghost,                                      01nov92py
  269: 
  270: : do-forward   ( ghost -- )
  271:   >link dup @  there rot !  T  A,  H ;
  272: : do-resolve   ( ghost -- )
  273:   >link @                   T  A,  H ;
  274: 
  275: : gexecute   ( ghost -- )   dup @
  276:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  277: : ghost,     ghost  gexecute ;
  278: 
  279: \ .unresolved                                          11may93jaw
  280: 
  281: variable ResolveFlag
  282: 
  283: \ ?touched                                             11may93jaw
  284: 
  285: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  286:                                0 <> and ;
  287: 
  288: : ?resolved  ( ghostname -- )
  289:   dup cell+ @ ?touched
  290:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  291: 
  292: >MINIMAL
  293: : .unresolved  ( -- )
  294:   ResolveFlag off cr ." Unresolved: "
  295:   Ghostnames
  296:   BEGIN @ dup
  297:   WHILE dup ?resolved
  298:   REPEAT drop ResolveFlag @ 0= IF ." Nothing!" THEN cr ;
  299: 
  300: >CROSS
  301: \ Header states                                        12dec92py
  302: 
  303: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  304: 
  305: VARIABLE ^imm
  306: 
  307: >TARGET
  308: : immediate     20 flag!
  309:                 ^imm @ @ dup <imm> = ?EXIT
  310:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  311:                 <imm> ^imm @ ! ;
  312: : restrict      40 flag! ;
  313: >CROSS
  314: 
  315: \ ALIAS2 ansforth conform alias                          9may93jaw
  316: 
  317: : ALIAS2 create here 0 , DOES> @ execute ;
  318: \ usage:
  319: \ ' alias2 bla !
  320: 
  321: \ Target Header Creation                               01nov92py
  322: 
  323: : string,  ( addr count -- )
  324:   dup T c, H bounds  DO  I c@ T c, H  LOOP ; 
  325: : name,  ( "name" -- )  name count string, T align H ;
  326: : view,   ( -- ) ( dummy ) ;
  327: 
  328: VARIABLE CreateFlag CreateFlag off
  329: 
  330: : (Theader ( "name" -- ghost ) T align H view,
  331:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  332:   >in @ name, >in ! T here H tlastcfa !
  333:   CreateFlag @ IF
  334:   >in @ alias2 swap >in !         \ create alias in target
  335:   >in @ ghost swap >in !
  336:   swap also ghosts ' previous swap !        \ tick ghost and store in alias
  337:   CreateFlag off
  338:   ELSE ghost THEN
  339:   dup >magic ^imm !     \ a pointer for immediate
  340:   Already @ IF  dup >end tdoes !
  341:   ELSE 0 tdoes ! THEN
  342:   80 flag! ;
  343: 
  344: VARIABLE ;Resolve 1 cells allot
  345: 
  346: : Theader  ( "name" -- )     (THeader there resolve 0 ;Resolve ! ;
  347: 
  348: >TARGET
  349: : Alias    ( cfa -- ) \ name
  350:   (THeader over resolve T A, H 80 flag! ;
  351: >CROSS
  352: 
  353: \ Conditionals and Comments                            11may93jaw
  354: 
  355: : ;Cond
  356:   postpone ;
  357:   swap ! ;  immediate
  358: 
  359: : Cond: ( -- ) \ name {code } ;
  360:   atonce on
  361:   ghost
  362:   >exec
  363:   :NONAME ;
  364: 
  365: : restrict? ( -- )
  366: \ aborts on interprete state - ae
  367:   state @ 0= ABORT" CROSS: Restricted" ;
  368: 
  369: : Comment ( -- )
  370:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  371: 
  372: Comment (       Comment \
  373: 
  374: \ Predefined ghosts                                    12dec92py
  375: 
  376: ghost 0=                                        drop
  377: ghost branch    ghost ?branch                   2drop
  378: ghost (do)      ghost (?do)                     2drop
  379: ghost (for)                                     drop
  380: ghost (loop)    ghost (+loop)                   2drop
  381: ghost (next)                                    drop
  382: ghost unloop    ghost ;S                        2drop
  383: ghost lit       ghost (compile) ghost !         2drop drop
  384: ghost (;code)   ghost noop                      2drop
  385: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  386: ghost '
  387: 
  388: \ compile                                              10may93jaw
  389: 
  390: : compile  ( -- ) \ name
  391:   restrict?
  392:   name gfind dup 0= ABORT" CROSS: Can't compile "
  393:   0> ( immediate? )
  394:   IF    >exec @ compile,
  395:   ELSE  postpone literal postpone gexecute  THEN ;
  396:                                         immediate
  397: 
  398: >TARGET
  399: : '  ( -- cfa ) name gfind 0= ABORT" CROSS: undefined "
  400:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  401: 
  402: Cond: [']  compile lit ghost gexecute ;Cond
  403: 
  404: >CROSS
  405: \ tLiteral                                             12dec92py
  406: 
  407: : lit, ( n -- )   compile lit T  ,  H ;
  408: : alit, ( n -- )  compile lit T A,  H ;
  409: 
  410: >TARGET
  411: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  412: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  413: 
  414: : Char ( "<char>" -- )  bl word char+ c@ ;
  415: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  416: 
  417: >CROSS
  418: \ Target compiling loop                                12dec92py
  419: \ ">tib trick thrown out                               10may93jaw
  420: \ number? defined at the top                           11may93jaw
  421: 
  422: \ compiled word might leave items on stack!
  423: : tcom ( in name -- )
  424:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  425:                         ELSE  nip gexecute  THEN EXIT THEN
  426:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  427:                ELSE  2drop >in !
  428:                ghost gexecute THEN  ;
  429: 
  430: >TARGET
  431: \ : ; DOES>                                            13dec92py
  432: \ ]                                                     9may93py/jaw
  433: 
  434: : ] state on
  435:     BEGIN
  436:         BEGIN >in @ name
  437:               dup c@ 0= WHILE 2drop refill 0=
  438:               ABORT" CROSS: End of file while target compiling"
  439:         REPEAT
  440:         tcom
  441:         state @
  442:         0=
  443:     UNTIL ;
  444: 
  445: \ by the way: defining a second interpreter (a compiler-)loop
  446: \             is not allowed if a system should be ans conform
  447: 
  448: : : ( -- colon-sys ) \ Name
  449:   (THeader ;Resolve ! there ;Resolve cell+ !
  450:   docol, depth T ] H ;
  451: 
  452: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  453: 
  454: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  455: 
  456: Cond: ; ( -- ) restrict?
  457:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  458:                           ELSE true ABORT" CROSS: Stack empty" THEN
  459:                compile ;S state off
  460:                ;Resolve @
  461:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  462:                ;Cond
  463: Cond: [  restrict? state off ;Cond
  464: 
  465: >CROSS
  466: : !does  :dodoes tlastcfa @ tuck T ! cell+ ! H ;
  467: 
  468: >TARGET
  469: Cond: DOES> restrict?
  470:         compile (;code) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  471:         ;Cond
  472: : DOES> dodoes, T here H !does depth T ] H ;
  473: 
  474: >CROSS
  475: \ Creation                                             01nov92py
  476: 
  477: \ Builder                                               11may93jaw
  478: 
  479: : Builder    ( Create do: "name" -- )
  480:   >in @ alias2 swap dup >in ! >r >r
  481:   Make-Ghost rot swap >exec ! ,
  482:   r> r> >in !
  483:   also ghosts ' previous swap !
  484:   DOES> dup >exec @ execute ;
  485: 
  486: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  487:   IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
  488:   :dodoes T A, H gexecute T here H cell - reloff ;
  489: 
  490: : TCreate ( ghost -- )
  491:   CreateFlag on
  492:   Theader dup gdoes,
  493:   >end @ >exec @ execute ;
  494: 
  495: : Build:  ( -- [xt] [colon-sys] )
  496:   :noname  postpone TCreate ;
  497: 
  498: : gdoes>  ( ghost -- addr flag )
  499:   state @ IF  gexecute true EXIT  THEN
  500:   cell+ @ T >body H false ;
  501: 
  502: \ DO: ;DO                                               11may93jaw
  503: \ changed to ?EXIT                                      10may93jaw
  504: 
  505: : (does>)        postpone does> ; immediate \ second level does>
  506: 
  507: : DO:     ( -- addr [xt] [colon-sys] )
  508:   here ghostheader
  509:   :noname
  510:   postpone (does>) postpone gdoes> postpone ?EXIT ;
  511: 
  512: : ;DO ( addr [xt] [colon-sys] -- )
  513:   postpone ;    ( S addr xt )
  514:   over >exec ! ; immediate
  515: 
  516: : by      ( -- addr ) \ Name
  517:   ghost >end @ ;
  518: 
  519: >TARGET
  520: \ Variables and Constants                              05dec92py
  521: 
  522: Build:  ;
  523: DO: ( ghost -- addr ) ;DO
  524: Builder Create
  525: by Create :dovar resolve
  526: 
  527: Build: T 0 , H ;
  528: by Create
  529: Builder Variable
  530: 
  531: Build: T 0 A, H ;
  532: by Create
  533: Builder AVariable
  534: 
  535: \ User variables                                       04may94py
  536: 
  537: >CROSS
  538: Variable tup  0 tup !
  539: Variable tudp 0 tudp !
  540: : u,  ( n -- udp )
  541:   tup @ tudp @ + T  ! H
  542:   tudp @ dup cell+ tudp ! ;
  543: : au, ( n -- udp )
  544:   tup @ tudp @ + T A! H
  545:   tudp @ dup cell+ tudp ! ;
  546: >TARGET
  547: 
  548: Build: T 0 u, , H ;
  549: DO: ( ghost -- up-addr )  T @ H tup @ + ;DO
  550: Builder User
  551: by User :douser resolve
  552: 
  553: Build: T 0 u, , 0 u, drop H ;
  554: by User
  555: Builder 2User
  556: 
  557: Build: T 0 au, , H ;
  558: by User
  559: Builder AUser
  560: 
  561: Build:  ( n -- ) T , H ;
  562: DO: ( ghost -- n ) T @ H ;DO
  563: Builder Constant
  564: by Constant :docon resolve
  565: 
  566: Build:  ( n -- ) T A, H ;
  567: by Constant
  568: Builder AConstant
  569: 
  570: Build: T 0 , H ;
  571: by Constant
  572: Builder Value
  573: 
  574: Build:  ( -- ) compile noop ;
  575: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  576: Builder Defer
  577: 
  578: \ structural conditionals                              17dec92py
  579: 
  580: >CROSS
  581: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  582: : sys?        ( sys -- sys )    dup 0= ?struc ;
  583: : >mark       ( -- sys )        T here  0 , H ;
  584: : >resolve    ( sys -- )        T here over - swap ! H ;
  585: : <resolve    ( sys -- )        T here - , H ;
  586: >TARGET
  587: 
  588: \ Structural Conditionals                              12dec92py
  589: 
  590: Cond: BUT       restrict? sys? swap ;Cond
  591: Cond: YET       restrict? sys? dup ;Cond
  592: 
  593: >CROSS
  594: Variable tleavings
  595: >TARGET
  596: 
  597: Cond: DONE   ( addr -- )  restrict? tleavings @
  598:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  599:       tleavings ! drop ;Cond
  600: 
  601: >CROSS
  602: : (leave  T here H tleavings @ T , H  tleavings ! ;
  603: >TARGET
  604: 
  605: Cond: LEAVE     restrict? compile branch (leave ;Cond
  606: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  607: 
  608: \ Structural Conditionals                              12dec92py
  609: 
  610: Cond: AHEAD     restrict? compile branch >mark ;Cond
  611: Cond: IF        restrict? compile ?branch >mark ;Cond
  612: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  613: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  614: 
  615: Cond: BEGIN     restrict? T here H ;Cond
  616: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  617: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  618: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  619: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  620: 
  621: \ Structural Conditionals                              12dec92py
  622: 
  623: Cond: DO        restrict? compile (do)   T here H ;Cond
  624: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  625: Cond: FOR       restrict? compile (for)  T here H ;Cond
  626: 
  627: >CROSS
  628: : loop]   dup <resolve cell - compile DONE compile unloop ;
  629: >TARGET
  630: 
  631: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  632: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  633: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  634: 
  635: \ String words                                         23feb93py
  636: 
  637: : ,"            [char] " parse string, T align H ;
  638: 
  639: Cond: ."        restrict? compile (.")     T ," H ;Cond
  640: Cond: S"        restrict? compile (S")     T ," H ;Cond
  641: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  642: 
  643: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  644: : IS            T ' >body ! H ;
  645: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  646: : TO            T ' >body ! H ;
  647: 
  648: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  649: 
  650: \ linked list primitive
  651: : linked        T here over @ A, swap ! H ;
  652: 
  653: : err"   s" ErrLink linked" evaluate T , H
  654:          [char] " parse string, T align H ;
  655: 
  656: : env"  [char] " parse s" EnvLink linked" evaluate
  657:         string, T align , H ;
  658: 
  659: : 2env" [char] " parse s" EnvLink linked" evaluate
  660:         here >r string, T align , , H
  661:         r> dup T c@ H 80 and swap T c! H ;
  662: 
  663: \ compile must be last                                 22feb93py
  664: 
  665: Cond: compile ( -- ) restrict? \ name
  666:       name gfind dup 0= ABORT" CROSS: Can't compile"
  667:       0> IF    gexecute
  668:          ELSE  dup >magic @ <imm> =
  669:                IF   gexecute
  670:                ELSE compile (compile) gexecute THEN THEN ;Cond
  671: 
  672: Cond: postpone ( -- ) restrict? \ name
  673:       name gfind dup 0= ABORT" CROSS: Can't compile"
  674:       0> IF    gexecute
  675:          ELSE  dup >magic @ <imm> =
  676:                IF   gexecute
  677:                ELSE compile (compile) gexecute THEN THEN ;Cond
  678: 
  679: >MINIMAL
  680: also minimal
  681: \ Usefull words                                        13feb93py
  682: 
  683: : KB  400 * ;
  684: 
  685: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  686: 
  687: : there? name gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
  688: 
  689: : [IFDEF] there? postpone [IF] ;
  690: : [IFUNDEF] there? 0= postpone [IF] ;
  691: 
  692: \ C: \- \+ Conditional Compiling                         09jun93jaw
  693: 
  694: : C: >in @ there? 0=
  695:      IF    >in ! T : H
  696:      ELSE drop
  697:         BEGIN bl word dup c@
  698:               IF   count comment? s" ;" compare 0= ?EXIT
  699:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  700:               THEN
  701:         AGAIN
  702:      THEN ;
  703: 
  704: also minimal
  705: 
  706: : \- there? IF postpone \ THEN ;
  707: : \+ there? 0= IF postpone \ THEN ;
  708: 
  709: : [IF]   postpone [IF] ;
  710: : [THEN] postpone [THEN] ;
  711: : [ELSE] postpone [ELSE] ;
  712: 
  713: Cond: [IF]      [IF] ;Cond
  714: Cond: [IFDEF]   [IFDEF] ;Cond
  715: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  716: Cond: [THEN]    [THEN] ;Cond
  717: Cond: [ELSE]    [ELSE] ;Cond
  718: 
  719: \ save-cross                                           17mar93py
  720: 
  721: \ i'm not interested in bigforth features this time    10may93jaw
  722: \ [IFDEF] file
  723: \ also file
  724: \ [THEN]
  725: \ included throw after create-file                     11may93jaw
  726: 
  727: endian Constant endian
  728: 
  729: : save-cross ( "name" -- )
  730:   bl parse ." Saving to " 2dup type
  731:   w/o bin create-file throw >r
  732:   image @ there r@ write-file throw
  733:   bit$  @ there 1- cell>bit rshift 1+ r@ write-file throw
  734:   r> close-file throw ;
  735: 
  736: \ words that should be in minimal
  737: 
  738: : + + ;         : 1- 1- ;
  739: : - - ;         : 2* 2* ;
  740: : dup dup ;     : over over ;
  741: : swap swap ;   : rot rot ;
  742: 
  743: \ include bug5.fs
  744: \ only forth also minimal definitions
  745: 
  746: : \ postpone \ ;
  747: : ( postpone ( ;
  748: : include bl word count included ;
  749: : .( [char] ) parse type ;
  750: : cr cr ;
  751: 
  752: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
  753: only forth also minimal definitions
  754: 
  755: \ cross-compiler words
  756: 
  757: : decimal       decimal ;
  758: : hex           hex ;
  759: 
  760: : tudp          T tudp H ;
  761: : tup           T tup H ;  minimal
  762: 
  763: \ for debugging...
  764: : order         order ;
  765: : words         words ;
  766: : .s            .s ;
  767: 
  768: : bye           bye ;
  769: 
  770: \ turnkey direction
  771: : H forth ; immediate
  772: : T minimal ; immediate
  773: : G ghosts ; immediate
  774: 
  775: : turnkey  0 set-order also Target definitions
  776:            also Minimal also ;
  777: 
  778: \ these ones are pefered:
  779: 
  780: : lock   turnkey ;
  781: : unlock forth also cross ;
  782: 
  783: unlock definitions also minimal
  784: : lock   lock ;
  785: lock

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