File:  [gforth] / gforth / cross.fs
Revision 1.10: download - view: text, annotated - select for diffs
Thu Aug 25 15:25:20 1994 UTC (25 years, 3 months ago) by anton
Branches: MAIN
CVS tags: HEAD
make now generates both images
the image names were changed
added C-level support for deferred words (dodefer)
made 2>r 2r> 2r@ 2rdrop primitives
some tuning of the outer interpreter; eliminated many words based on
 counted strings
Replaced the hash function with one that works better for larger tables

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ $Id: cross.fs,v 1.10 1994/08/25 15:25:20 anton 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-file
   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 :dodefer
  108: -7 Constant :dodoes
  109: -8 Constant :doesjump
  110: 
  111: >CROSS
  112: 
  113: endian  0 pad ! -1 pad c! pad @ 0<
  114: = [IF]   : bswap ; immediate 
  115: [ELSE]   : bswap ( big / little -- little / big )  0
  116:            cell 1- FOR  bits/byte lshift over
  117:                         [ 1 bits/byte lshift 1- ] Literal and or
  118:                         swap bits/byte rshift swap  NEXT  nip ;
  119: [THEN]
  120: 
  121: \ Memory initialisation                                05dec92py
  122: \ Fixed bug in else part                               11may93jaw
  123: 
  124: [IFDEF] Memory \ Memory is a bigFORTH feature
  125:    also Memory
  126:    : initmem ( var len -- )
  127:      2dup swap handle! >r @ r> erase ;
  128:    toss
  129: [ELSE]
  130:    : initmem ( var len -- )
  131:      tuck allocate abort" CROSS: No memory for target"
  132:      ( len var adr ) dup rot !
  133:      ( len adr ) swap erase ;
  134: [THEN]
  135: 
  136: \ MakeKernal                                           12dec92py
  137: 
  138: >MINIMAL
  139: : makekernal ( targetsize -- targetsize )
  140:   bit$  over 1- cell>bit rshift 1+ initmem
  141:   image over initmem tdp off ;
  142: 
  143: >CROSS
  144: \ Bit string manipulation                               06oct92py
  145: \                                                       9may93jaw
  146: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  147: : bits ( n -- n ) chars Bittable + c@ ;
  148: 
  149: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  150: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  151: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  152: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  153: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  154: 
  155: \ Target memory access                                 06oct92py
  156: 
  157: : align+  ( taddr -- rest )
  158:     cell tuck 1- and - [ cell 1- ] Literal and ;
  159: 
  160: >TARGET
  161: : aligned ( taddr -- ta-addr )  dup align+ + ;
  162: \ assumes cell alignment granularity (as GNU C)
  163: 
  164: >CROSS
  165: : >image ( taddr -- absaddr )  image @ + ;
  166: >TARGET
  167: : @  ( taddr -- w )     >image @ bswap ;
  168: : !  ( w taddr -- )     >r bswap r> >image ! ;
  169: : c@ ( taddr -- char )  >image c@ ;
  170: : c! ( char taddr -- )  >image c! ;
  171: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  172: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  173: 
  174: \ Target compilation primitives                        06oct92py
  175: \ included A!                                          16may93jaw
  176: 
  177: : here  ( -- there )    there ;
  178: : allot ( n -- )        tdp +! ;
  179: : ,     ( w -- )        T here H cell T allot  ! H ;
  180: : c,    ( char -- )     T here    1 allot c! H ;
  181: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  182: 
  183: : A!                    dup relon T ! H ;
  184: : A,    ( w -- )        T here H relon T , H ;
  185: 
  186: >CROSS
  187: 
  188: \ threading modell                                     13dec92py
  189: 
  190: \ generic threading modell
  191: : docol,  ( -- ) :docol T A, 0 , H ;
  192: 
  193: >TARGET
  194: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  195: >CROSS
  196: 
  197: : dodoes, ( -- ) T :doesjump A, 0 , H ;
  198: 
  199: \ Ghost Builder                                        06oct92py
  200: 
  201: \ <T T> new version with temp variable                 10may93jaw
  202: 
  203: VARIABLE VocTemp
  204: 
  205: : <T  get-current VocTemp ! also Ghosts definitions ;
  206: : T>  previous VocTemp @ set-current ;
  207: 
  208: 4711 Constant <fwd>             4712 Constant <res>
  209: 4713 Constant <imm>
  210: 
  211: \ iForth makes only immediate directly after create
  212: \ make atonce trick! ?
  213: 
  214: Variable atonce atonce off
  215: 
  216: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  217: 
  218: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  219: 
  220: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
  221: : >end 3 cells + ;
  222: 
  223: : Make-Ghost ( "name" -- ghost )
  224:   >in @ GhostName swap >in !
  225:   <T Create atonce @ IF immediate atonce off THEN
  226:   here tuck swap ! ghostheader T>
  227:   DOES>  >exec @ execute ;
  228: 
  229: \ ghost words                                          14oct92py
  230: \                                          changed:    10may93py/jaw
  231: 
  232: : gfind   ( string -- ghost true/1 / string false )
  233: \ searches for string in word-list ghosts
  234: \ !! wouldn't it be simpler to just use search-wordlist ? ae
  235:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  236: \ >r get-order  0 set-order also ghosts  r> find >r >r
  237:   >r r@ IF  >body nip  THEN  r> ;
  238: \ set-order  r> r@  IF  >body  THEN  r> ;
  239: 
  240: VARIABLE Already
  241: 
  242: : ghost   ( "name" -- ghost )
  243:   Already off
  244:   >in @  name gfind   IF  Already on nip EXIT  THEN
  245:   drop  >in !  Make-Ghost ;
  246: 
  247: \ resolve                                              14oct92py
  248: 
  249: : resolve-loop ( ghost tcfa -- ghost tcfa )
  250:   >r dup >link @
  251:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  252: 
  253: \ exists                                                9may93jaw
  254: 
  255: : exists ( ghost tcfa -- )
  256:   over GhostNames
  257:   BEGIN @ dup
  258:   WHILE 2dup cell+ @ =
  259:   UNTIL
  260:         nip 2 cells + count cr ." CROSS: Exists: " type 4 spaces
  261:         swap cell+ !
  262:   ELSE true ABORT" CROSS: Ghostnames inconsistent"
  263:   THEN ;
  264: 
  265: : resolve  ( ghost tcfa -- )
  266:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  267:   resolve-loop  over >link ! <res> swap >magic ! ;
  268: 
  269: \ gexecute ghost,                                      01nov92py
  270: 
  271: : do-forward   ( ghost -- )
  272:   >link dup @  there rot !  T  A,  H ;
  273: : do-resolve   ( ghost -- )
  274:   >link @                   T  A,  H ;
  275: 
  276: : gexecute   ( ghost -- )   dup @
  277:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  278: : ghost,     ghost  gexecute ;
  279: 
  280: \ .unresolved                                          11may93jaw
  281: 
  282: variable ResolveFlag
  283: 
  284: \ ?touched                                             11may93jaw
  285: 
  286: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  287:                                0 <> and ;
  288: 
  289: : ?resolved  ( ghostname -- )
  290:   dup cell+ @ ?touched
  291:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  292: 
  293: >MINIMAL
  294: : .unresolved  ( -- )
  295:   ResolveFlag off cr ." Unresolved: "
  296:   Ghostnames
  297:   BEGIN @ dup
  298:   WHILE dup ?resolved
  299:   REPEAT drop ResolveFlag @
  300:   IF
  301:       1 (bye)
  302:   ELSE
  303:       ." Nothing!"
  304:   THEN
  305:   cr ;
  306: 
  307: >CROSS
  308: \ Header states                                        12dec92py
  309: 
  310: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  311: 
  312: VARIABLE ^imm
  313: 
  314: >TARGET
  315: : immediate     20 flag!
  316:                 ^imm @ @ dup <imm> = ?EXIT
  317:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  318:                 <imm> ^imm @ ! ;
  319: : restrict      40 flag! ;
  320: >CROSS
  321: 
  322: \ ALIAS2 ansforth conform alias                          9may93jaw
  323: 
  324: : ALIAS2 create here 0 , DOES> @ execute ;
  325: \ usage:
  326: \ ' alias2 bla !
  327: 
  328: \ Target Header Creation                               01nov92py
  329: 
  330: : string,  ( addr count -- )
  331:   dup T c, H bounds  DO  I c@ T c, H  LOOP ; 
  332: : name,  ( "name" -- )  name count string, T align H ;
  333: : view,   ( -- ) ( dummy ) ;
  334: 
  335: VARIABLE CreateFlag CreateFlag off
  336: 
  337: : (Theader ( "name" -- ghost ) T align H view,
  338:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  339:   >in @ name, >in ! T here H tlastcfa !
  340:   CreateFlag @ IF
  341:   >in @ alias2 swap >in !         \ create alias in target
  342:   >in @ ghost swap >in !
  343:   swap also ghosts ' previous swap !        \ tick ghost and store in alias
  344:   CreateFlag off
  345:   ELSE ghost THEN
  346:   dup >magic ^imm !     \ a pointer for immediate
  347:   Already @ IF  dup >end tdoes !
  348:   ELSE 0 tdoes ! THEN
  349:   80 flag! ;
  350: 
  351: VARIABLE ;Resolve 1 cells allot
  352: 
  353: : Theader  ( "name" -- )     (THeader there resolve 0 ;Resolve ! ;
  354: 
  355: >TARGET
  356: : Alias    ( cfa -- ) \ name
  357:   (THeader over resolve T A, H 80 flag! ;
  358: >CROSS
  359: 
  360: \ Conditionals and Comments                            11may93jaw
  361: 
  362: : ;Cond
  363:   postpone ;
  364:   swap ! ;  immediate
  365: 
  366: : Cond: ( -- ) \ name {code } ;
  367:   atonce on
  368:   ghost
  369:   >exec
  370:   :NONAME ;
  371: 
  372: : restrict? ( -- )
  373: \ aborts on interprete state - ae
  374:   state @ 0= ABORT" CROSS: Restricted" ;
  375: 
  376: : Comment ( -- )
  377:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  378: 
  379: Comment (       Comment \
  380: 
  381: \ Predefined ghosts                                    12dec92py
  382: 
  383: ghost 0=                                        drop
  384: ghost branch    ghost ?branch                   2drop
  385: ghost (do)      ghost (?do)                     2drop
  386: ghost (for)                                     drop
  387: ghost (loop)    ghost (+loop)                   2drop
  388: ghost (next)                                    drop
  389: ghost unloop    ghost ;S                        2drop
  390: ghost lit       ghost (compile) ghost !         2drop drop
  391: ghost (;code)   ghost noop                      2drop
  392: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  393: ghost '
  394: 
  395: \ compile                                              10may93jaw
  396: 
  397: : compile  ( -- ) \ name
  398:   restrict?
  399:   name gfind dup 0= ABORT" CROSS: Can't compile "
  400:   0> ( immediate? )
  401:   IF    >exec @ compile,
  402:   ELSE  postpone literal postpone gexecute  THEN ;
  403:                                         immediate
  404: 
  405: >TARGET
  406: : '  ( -- cfa ) name gfind 0= ABORT" CROSS: undefined "
  407:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  408: 
  409: Cond: [']  compile lit ghost gexecute ;Cond
  410: 
  411: >CROSS
  412: \ tLiteral                                             12dec92py
  413: 
  414: : lit, ( n -- )   compile lit T  ,  H ;
  415: : alit, ( n -- )  compile lit T A,  H ;
  416: 
  417: >TARGET
  418: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  419: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  420: 
  421: : Char ( "<char>" -- )  bl word char+ c@ ;
  422: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  423: 
  424: >CROSS
  425: \ Target compiling loop                                12dec92py
  426: \ ">tib trick thrown out                               10may93jaw
  427: \ number? defined at the top                           11may93jaw
  428: 
  429: \ compiled word might leave items on stack!
  430: : tcom ( in name -- )
  431:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  432:                         ELSE  nip gexecute  THEN EXIT THEN
  433:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  434:                ELSE  2drop >in !
  435:                ghost gexecute THEN  ;
  436: 
  437: >TARGET
  438: \ : ; DOES>                                            13dec92py
  439: \ ]                                                     9may93py/jaw
  440: 
  441: : ] state on
  442:     BEGIN
  443:         BEGIN >in @ name
  444:               dup c@ 0= WHILE 2drop refill 0=
  445:               ABORT" CROSS: End of file while target compiling"
  446:         REPEAT
  447:         tcom
  448:         state @
  449:         0=
  450:     UNTIL ;
  451: 
  452: \ by the way: defining a second interpreter (a compiler-)loop
  453: \             is not allowed if a system should be ans conform
  454: 
  455: : : ( -- colon-sys ) \ Name
  456:   (THeader ;Resolve ! there ;Resolve cell+ !
  457:   docol, depth T ] H ;
  458: 
  459: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  460: 
  461: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  462: 
  463: Cond: ; ( -- ) restrict?
  464:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  465:                           ELSE true ABORT" CROSS: Stack empty" THEN
  466:                compile ;S state off
  467:                ;Resolve @
  468:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  469:                ;Cond
  470: Cond: [  restrict? state off ;Cond
  471: 
  472: >CROSS
  473: : !does  :dodoes tlastcfa @ tuck T ! cell+ ! H ;
  474: 
  475: >TARGET
  476: Cond: DOES> restrict?
  477:         compile (;code) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  478:         ;Cond
  479: : DOES> dodoes, T here H !does depth T ] H ;
  480: 
  481: >CROSS
  482: \ Creation                                             01nov92py
  483: 
  484: \ Builder                                               11may93jaw
  485: 
  486: : Builder    ( Create do: "name" -- )
  487:   >in @ alias2 swap dup >in ! >r >r
  488:   Make-Ghost rot swap >exec ! ,
  489:   r> r> >in !
  490:   also ghosts ' previous swap !
  491:   DOES> dup >exec @ execute ;
  492: 
  493: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  494:   IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
  495:   :dodoes T A, H gexecute T here H cell - reloff ;
  496: 
  497: : TCreate ( ghost -- )
  498:   CreateFlag on
  499:   Theader dup gdoes,
  500:   >end @ >exec @ execute ;
  501: 
  502: : Build:  ( -- [xt] [colon-sys] )
  503:   :noname  postpone TCreate ;
  504: 
  505: : gdoes>  ( ghost -- addr flag )
  506:   state @ IF  gexecute true EXIT  THEN
  507:   cell+ @ T >body H false ;
  508: 
  509: \ DO: ;DO                                               11may93jaw
  510: \ changed to ?EXIT                                      10may93jaw
  511: 
  512: : (does>)        postpone does> ; immediate \ second level does>
  513: 
  514: : DO:     ( -- addr [xt] [colon-sys] )
  515:   here ghostheader
  516:   :noname
  517:   postpone (does>) postpone gdoes> postpone ?EXIT ;
  518: 
  519: : ;DO ( addr [xt] [colon-sys] -- )
  520:   postpone ;    ( S addr xt )
  521:   over >exec ! ; immediate
  522: 
  523: : by      ( -- addr ) \ Name
  524:   ghost >end @ ;
  525: 
  526: >TARGET
  527: \ Variables and Constants                              05dec92py
  528: 
  529: Build:  ;
  530: DO: ( ghost -- addr ) ;DO
  531: Builder Create
  532: by Create :dovar resolve
  533: 
  534: Build: T 0 , H ;
  535: by Create
  536: Builder Variable
  537: 
  538: Build: T 0 A, H ;
  539: by Create
  540: Builder AVariable
  541: 
  542: \ User variables                                       04may94py
  543: 
  544: >CROSS
  545: Variable tup  0 tup !
  546: Variable tudp 0 tudp !
  547: : u,  ( n -- udp )
  548:   tup @ tudp @ + T  ! H
  549:   tudp @ dup cell+ tudp ! ;
  550: : au, ( n -- udp )
  551:   tup @ tudp @ + T A! H
  552:   tudp @ dup cell+ tudp ! ;
  553: >TARGET
  554: 
  555: Build: T 0 u, , H ;
  556: DO: ( ghost -- up-addr )  T @ H tup @ + ;DO
  557: Builder User
  558: by User :douser resolve
  559: 
  560: Build: T 0 u, , 0 u, drop H ;
  561: by User
  562: Builder 2User
  563: 
  564: Build: T 0 au, , H ;
  565: by User
  566: Builder AUser
  567: 
  568: Build:  ( n -- ) T , H ;
  569: DO: ( ghost -- n ) T @ H ;DO
  570: Builder Constant
  571: by Constant :docon resolve
  572: 
  573: Build:  ( n -- ) T A, H ;
  574: by Constant
  575: Builder AConstant
  576: 
  577: Build: T 0 , H ;
  578: by Constant
  579: Builder Value
  580: 
  581: Build:  ( -- ) compile noop ;
  582: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  583: Builder Defer
  584: by Defer :dodefer resolve
  585: 
  586: \ structural conditionals                              17dec92py
  587: 
  588: >CROSS
  589: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  590: : sys?        ( sys -- sys )    dup 0= ?struc ;
  591: : >mark       ( -- sys )        T here  0 , H ;
  592: : >resolve    ( sys -- )        T here over - swap ! H ;
  593: : <resolve    ( sys -- )        T here - , H ;
  594: >TARGET
  595: 
  596: \ Structural Conditionals                              12dec92py
  597: 
  598: Cond: BUT       restrict? sys? swap ;Cond
  599: Cond: YET       restrict? sys? dup ;Cond
  600: 
  601: >CROSS
  602: Variable tleavings
  603: >TARGET
  604: 
  605: Cond: DONE   ( addr -- )  restrict? tleavings @
  606:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  607:       tleavings ! drop ;Cond
  608: 
  609: >CROSS
  610: : (leave  T here H tleavings @ T , H  tleavings ! ;
  611: >TARGET
  612: 
  613: Cond: LEAVE     restrict? compile branch (leave ;Cond
  614: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  615: 
  616: \ Structural Conditionals                              12dec92py
  617: 
  618: Cond: AHEAD     restrict? compile branch >mark ;Cond
  619: Cond: IF        restrict? compile ?branch >mark ;Cond
  620: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  621: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  622: 
  623: Cond: BEGIN     restrict? T here H ;Cond
  624: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  625: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  626: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  627: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  628: 
  629: \ Structural Conditionals                              12dec92py
  630: 
  631: Cond: DO        restrict? compile (do)   T here H ;Cond
  632: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  633: Cond: FOR       restrict? compile (for)  T here H ;Cond
  634: 
  635: >CROSS
  636: : loop]   dup <resolve cell - compile DONE compile unloop ;
  637: >TARGET
  638: 
  639: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  640: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  641: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  642: 
  643: \ String words                                         23feb93py
  644: 
  645: : ,"            [char] " parse string, T align H ;
  646: 
  647: Cond: ."        restrict? compile (.")     T ," H ;Cond
  648: Cond: S"        restrict? compile (S")     T ," H ;Cond
  649: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  650: 
  651: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  652: : IS            T ' >body ! H ;
  653: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  654: : TO            T ' >body ! H ;
  655: 
  656: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  657: 
  658: \ linked list primitive
  659: : linked        T here over @ A, swap ! H ;
  660: 
  661: : err"   s" ErrLink linked" evaluate T , H
  662:          [char] " parse string, T align H ;
  663: 
  664: : env"  [char] " parse s" EnvLink linked" evaluate
  665:         string, T align , H ;
  666: 
  667: : 2env" [char] " parse s" EnvLink linked" evaluate
  668:         here >r string, T align , , H
  669:         r> dup T c@ H 80 and swap T c! H ;
  670: 
  671: \ compile must be last                                 22feb93py
  672: 
  673: Cond: compile ( -- ) restrict? \ name
  674:       name gfind dup 0= ABORT" CROSS: Can't compile"
  675:       0> IF    gexecute
  676:          ELSE  dup >magic @ <imm> =
  677:                IF   gexecute
  678:                ELSE compile (compile) gexecute THEN THEN ;Cond
  679: 
  680: Cond: postpone ( -- ) restrict? \ name
  681:       name gfind dup 0= ABORT" CROSS: Can't compile"
  682:       0> IF    gexecute
  683:          ELSE  dup >magic @ <imm> =
  684:                IF   gexecute
  685:                ELSE compile (compile) gexecute THEN THEN ;Cond
  686: 
  687: >MINIMAL
  688: also minimal
  689: \ Usefull words                                        13feb93py
  690: 
  691: : KB  400 * ;
  692: 
  693: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  694: 
  695: : there? name gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
  696: 
  697: : [IFDEF] there? postpone [IF] ;
  698: : [IFUNDEF] there? 0= postpone [IF] ;
  699: 
  700: \ C: \- \+ Conditional Compiling                         09jun93jaw
  701: 
  702: : C: >in @ there? 0=
  703:      IF    >in ! T : H
  704:      ELSE drop
  705:         BEGIN bl word dup c@
  706:               IF   count comment? s" ;" compare 0= ?EXIT
  707:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  708:               THEN
  709:         AGAIN
  710:      THEN ;
  711: 
  712: also minimal
  713: 
  714: : \- there? IF postpone \ THEN ;
  715: : \+ there? 0= IF postpone \ THEN ;
  716: 
  717: : [IF]   postpone [IF] ;
  718: : [THEN] postpone [THEN] ;
  719: : [ELSE] postpone [ELSE] ;
  720: 
  721: Cond: [IF]      [IF] ;Cond
  722: Cond: [IFDEF]   [IFDEF] ;Cond
  723: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  724: Cond: [THEN]    [THEN] ;Cond
  725: Cond: [ELSE]    [ELSE] ;Cond
  726: 
  727: \ save-cross                                           17mar93py
  728: 
  729: \ i'm not interested in bigforth features this time    10may93jaw
  730: \ [IFDEF] file
  731: \ also file
  732: \ [THEN]
  733: \ included throw after create-file                     11may93jaw
  734: 
  735: endian Constant endian
  736: 
  737: : save-cross ( "name" -- )
  738:   bl parse ." Saving to " 2dup type
  739:   w/o bin create-file throw >r
  740:   image @ there r@ write-file throw
  741:   bit$  @ there 1- cell>bit rshift 1+ r@ write-file throw
  742:   r> close-file throw ;
  743: 
  744: \ words that should be in minimal
  745: 
  746: : + + ;         : 1- 1- ;
  747: : - - ;         : 2* 2* ;
  748: : dup dup ;     : over over ;
  749: : swap swap ;   : rot rot ;
  750: 
  751: \ include bug5.fs
  752: \ only forth also minimal definitions
  753: 
  754: : \ postpone \ ;
  755: : ( postpone ( ;
  756: : include bl word count included ;
  757: : .( [char] ) parse type ;
  758: : cr cr ;
  759: 
  760: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
  761: only forth also minimal definitions
  762: 
  763: \ cross-compiler words
  764: 
  765: : decimal       decimal ;
  766: : hex           hex ;
  767: 
  768: : tudp          T tudp H ;
  769: : tup           T tup H ;  minimal
  770: 
  771: \ for debugging...
  772: : order         order ;
  773: : words         words ;
  774: : .s            .s ;
  775: 
  776: : bye           bye ;
  777: 
  778: \ turnkey direction
  779: : H forth ; immediate
  780: : T minimal ; immediate
  781: : G ghosts ; immediate
  782: 
  783: : turnkey  0 set-order also Target definitions
  784:            also Minimal also ;
  785: 
  786: \ these ones are pefered:
  787: 
  788: : lock   turnkey ;
  789: : unlock forth also cross ;
  790: 
  791: unlock definitions also minimal
  792: : lock   lock ;
  793: lock

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