Annotation of gforth/prims2x.fs, revision 1.67

1.16      anton       1: \ converts primitives to, e.g., C code 
                      2: 
1.47      anton       3: \ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.16      anton       4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
1.48      anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.16      anton      20: 
                     21: 
1.1       anton      22: \ This is not very nice (hard limits, no checking, assumes 1 chars = 1)
                     23: 
                     24: \ Optimizations:
                     25: \ superfluous stores are removed. GCC removes the superfluous loads by itself
                     26: \ TOS and FTOS can be kept in register( variable)s.
                     27: \ 
                     28: \ Problems:
                     29: \ The TOS optimization is somewhat hairy. The problems by example:
                     30: \ 1) dup ( w -- w w ): w=TOS; sp-=1; sp[1]=w; TOS=w;
                     31: \    The store is not superfluous although the earlier opt. would think so
                     32: \    Alternatively:    sp[0]=TOS; w=TOS; sp-=1; TOS=w;
                     33: \ 2) ( -- .. ): sp[0] = TOS; ... /* This additional store is necessary */
                     34: \ 3) ( .. -- ): ... TOS = sp[0]; /* as well as this load */
                     35: \ 4) ( -- ): /* but here they are unnecessary */
                     36: \ 5) Words that call NEXT themselves have to be done very carefully.
                     37: \
                     38: \ To do:
1.8       pazsan     39: \ add the store optimization for doubles
1.1       anton      40: \ regarding problem 1 above: It would be better (for over) to implement
                     41: \      the alternative
                     42: 
1.3       pazsan     43: warnings off
                     44: 
1.39      jwilke     45: [IFUNDEF] vocabulary   \ we are executed just with kernel image
                     46:                        \ load the rest that is needed
                     47:                        \ (require fails because this file is needed from a
                     48:                        \ different directory with the wordlibraries)
                     49: include ./search.fs                    
                     50: include ./extend.fs
1.40      anton      51: [THEN]
                     52: 
                     53: [IFUNDEF] environment?
1.39      jwilke     54: include ./environ.fs
                     55: [THEN]
1.25      pazsan     56: 
1.49      anton      57: : struct% struct ; \ struct is redefined in gray
                     58: 
1.39      jwilke     59: include ./gray.fs
1.1       anton      60: 
                     61: 100 constant max-effect \ number of things on one side of a stack effect
                     62: 255 constant maxchar
                     63: maxchar 1+ constant eof-char
1.17      anton      64: #tab constant tab-char
                     65: #lf constant nl-char
1.1       anton      66: 
1.18      anton      67: variable rawinput \ pointer to next character to be scanned
                     68: variable endrawinput \ pointer to the end of the input (the char after the last)
                     69: variable cookedinput \ pointer to the next char to be parsed
1.17      anton      70: variable line \ line number of char pointed to by input
1.65      anton      71: variable line-start \ pointer to start of current line (for error messages)
                     72: 0 line !
1.17      anton      73: 2variable filename \ filename of original input file
                     74: 0 0 filename 2!
1.25      pazsan     75: 2variable f-comment
                     76: 0 0 f-comment 2!
1.17      anton      77: variable skipsynclines \ are sync lines ("#line ...") invisible to the parser?
                     78: skipsynclines on 
1.1       anton      79: 
                     80: : start ( -- addr )
1.18      anton      81:  cookedinput @ ;
1.1       anton      82: 
                     83: : end ( addr -- addr u )
1.18      anton      84:  cookedinput @ over - ;
1.1       anton      85: 
1.63      anton      86: : quote ( -- )
                     87:     [char] " emit ;
                     88: 
1.1       anton      89: variable output \ xt ( -- ) of output word
                     90: 
                     91: : printprim ( -- )
                     92:  output @ execute ;
                     93: 
1.49      anton      94: struct%
                     95:     cell% 2* field stack-pointer \ stackpointer name
                     96:     cell% 2* field stack-cast \ cast string for assignments to stack elements
1.53      anton      97:     cell%    field stack-in-index-xt \ ( in-size item -- in-index )
1.49      anton      98:     cell%    field stack-in  \ number of stack items in effect in
                     99:     cell%    field stack-out \ number of stack items in effect out
                    100: end-struct stack%
                    101: 
1.53      anton     102: struct%
                    103:  cell% 2* field item-name   \ name, excluding stack prefixes
                    104:  cell%    field item-stack  \ descriptor for the stack used, 0 is default
                    105:  cell%    field item-type   \ descriptor for the item type
                    106:  cell%    field item-offset \ offset in stack items, 0 for the deepest element
1.66      anton     107:  cell%   field item-first  \ true if this is the first occurence of the item
1.53      anton     108: end-struct item%
                    109: 
                    110: struct%
                    111:     cell% 2* field type-c-name
                    112:     cell%    field type-stack \ default stack
                    113:     cell%    field type-size  \ size of type in stack items
                    114:     cell%    field type-fetch \ xt of fetch code generator ( item -- )
                    115:     cell%    field type-store \ xt of store code generator ( item -- )
                    116: end-struct type%
                    117: 
                    118: : stack-in-index ( in-size item -- in-index )
                    119:     item-offset @ - 1- ;
                    120: 
                    121: : inst-in-index ( in-size item -- in-index )
                    122:     nip dup item-offset @ swap item-type @ type-size @ + 1- ;
                    123: 
1.49      anton     124: : make-stack ( addr-ptr u1 addr-cast u2 "stack-name" -- )
                    125:     create stack% %allot >r
                    126:     save-mem r@ stack-cast 2!
1.53      anton     127:     save-mem r@ stack-pointer 2! 
                    128:     ['] stack-in-index r> stack-in-index-xt ! ;
1.49      anton     129: 
                    130: s" sp" save-mem s" (Cell)" make-stack data-stack 
                    131: s" fp" save-mem s" "       make-stack fp-stack
1.51      anton     132: s" rp" save-mem s" (Cell)" make-stack return-stack
1.62      anton     133: s" IP" save-mem s" error don't use # on results" make-stack inst-stream
1.53      anton     134: ' inst-in-index inst-stream stack-in-index-xt !
1.49      anton     135: \ !! initialize stack-in and stack-out
                    136: 
                    137: \ stack items
                    138: 
                    139: : init-item ( addr u addr1 -- )
                    140:     \ initialize item at addr1 with name addr u
                    141:     \ !! remove stack prefix
                    142:     dup item% %size erase
                    143:     item-name 2! ;
                    144: 
1.64      anton     145: : map-items { addr end xt -- }
                    146:     \ perform xt for all items in array addr...end
                    147:     end addr ?do
                    148:        i xt execute
                    149:     item% %size +loop ;
                    150: 
1.49      anton     151: \ various variables for storing stuff of one primitive
1.1       anton     152: 
                    153: 2variable forth-name
                    154: 2variable wordset
                    155: 2variable c-name
                    156: 2variable doc
                    157: 2variable c-code
                    158: 2variable forth-code
                    159: 2variable stack-string
1.49      anton     160: create effect-in  max-effect item% %size * allot
                    161: create effect-out max-effect item% %size * allot
1.1       anton     162: variable effect-in-end ( pointer )
                    163: variable effect-out-end ( pointer )
1.17      anton     164: variable c-line
                    165: 2variable c-filename
                    166: variable name-line
                    167: 2variable name-filename
                    168: 2variable last-name-filename
1.1       anton     169: 
1.14      pazsan    170: variable primitive-number -10 primitive-number !
1.30      pazsan    171: Variable function-number 0 function-number !
1.1       anton     172: 
                    173: \ for several reasons stack items of a word are stored in a wordlist
                    174: \ since neither forget nor marker are implemented yet, we make a new
                    175: \ wordlist for every word and store it in the variable items
                    176: variable items
                    177: 
                    178: \ a few more set ops
                    179: 
                    180: : bit-equivalent ( w1 w2 -- w3 )
                    181:  xor invert ;
                    182: 
                    183: : complement ( set1 -- set2 )
                    184:  empty ['] bit-equivalent binary-set-operation ;
                    185: 
                    186: \ types
                    187: 
1.49      anton     188: : stack-access ( n stack -- )
                    189:     \ print a stack access at index n of stack
                    190:     stack-pointer 2@ type
                    191:     dup
                    192:     if
                    193:        ." [" 0 .r ." ]"
                    194:     else
                    195:        drop ." TOS"
                    196:     endif ;
1.1       anton     197: 
1.53      anton     198: : item-in-index { item -- n }
1.49      anton     199:     \ n is the index of item (in the in-effect)
1.53      anton     200:     item item-stack @ dup >r stack-in @ ( in-size r:stack )
                    201:     item r> stack-in-index-xt @ execute ;
1.1       anton     202: 
                    203: : fetch-single ( item -- )
1.49      anton     204:  \ fetch a single stack item from its stack
1.1       anton     205:  >r
1.8       pazsan    206:  r@ item-name 2@ type
                    207:  ."  = (" 
1.1       anton     208:  r@ item-type @ type-c-name 2@ type ." ) "
1.49      anton     209:  r@ item-in-index r@ item-stack @ stack-access
                    210:  ." ;" cr
1.1       anton     211:  rdrop ; 
                    212: 
                    213: : fetch-double ( item -- )
1.49      anton     214:  \ fetch a double stack item from its stack
1.1       anton     215:  >r
1.20      anton     216:  ." FETCH_DCELL("
                    217:  r@ item-name 2@ type ." , "
1.61      anton     218:  r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
                    219:  ." , "                      -1 under+ ." (Cell)" stack-access
1.20      anton     220:  ." );" cr
1.1       anton     221:  rdrop ;
                    222: 
1.49      anton     223: : same-as-in? ( item -- f )
                    224:  \ f is true iff the offset and stack of item is the same as on input
1.1       anton     225:  >r
                    226:  r@ item-name 2@ items @ search-wordlist 0=
1.8       pazsan    227:  abort" bug"
1.1       anton     228:  execute @
                    229:  dup r@ =
                    230:  if \ item first appeared in output
                    231:    drop false
                    232:  else
1.49      anton     233:    dup  item-stack  @ r@ item-stack  @ = 
                    234:    swap item-offset @ r@ item-offset @ = and
1.1       anton     235:  endif
                    236:  rdrop ;
                    237: 
1.49      anton     238: : item-out-index ( item -- n )
                    239:     \ n is the index of item (in the in-effect)
                    240:     >r r@ item-stack @ stack-out @ r> item-offset @ - 1- ;
1.31      pazsan    241: 
1.1       anton     242: : really-store-single ( item -- )
                    243:  >r
1.49      anton     244:  r@ item-out-index r@ item-stack @ stack-access ."  = "
                    245:  r@ item-stack @ stack-cast 2@ type
1.1       anton     246:  r@ item-name 2@ type ." ;"
                    247:  rdrop ;
                    248: 
                    249: : store-single ( item -- )
                    250:  >r
1.49      anton     251:  r@ same-as-in?
1.1       anton     252:  if
1.49      anton     253:    r@ item-in-index 0= r@ item-out-index 0= xor
1.1       anton     254:    if
1.49      anton     255:        ." IF_" r@ item-stack @ stack-pointer 2@ type
                    256:        ." TOS(" r@ really-store-single ." );" cr
1.1       anton     257:    endif
                    258:  else
                    259:    r@ really-store-single cr
                    260:  endif
                    261:  rdrop ;
                    262: 
                    263: : store-double ( item -- )
                    264: \ !! store optimization is not performed, because it is not yet needed
                    265:  >r
1.20      anton     266:  ." STORE_DCELL(" r@ item-name 2@ type ." , "
1.49      anton     267:  r@ item-out-index r@ item-stack @ 2dup stack-access
                    268:  ." , "                       -1 under+ stack-access
1.20      anton     269:  ." );" cr
1.1       anton     270:  rdrop ;
                    271: 
1.54      anton     272: : single ( -- xt1 xt2 n )
                    273:     ['] fetch-single ['] store-single 1 ;
1.1       anton     274: 
1.54      anton     275: : double ( -- xt1 xt2 n )
                    276:     ['] fetch-double ['] store-double 2 ;
1.1       anton     277: 
                    278: : s, ( addr u -- )
                    279: \ allocate a string
                    280:  here swap dup allot move ;
                    281: 
1.50      anton     282: wordlist constant prefixes
                    283: 
                    284: : declare ( addr "name" -- )
                    285: \ remember that there is a stack item at addr called name
                    286:  create , ;
                    287: 
                    288: : !default ( w addr -- )
                    289:     dup @ if
                    290:        2drop \ leave nonzero alone
                    291:     else
                    292:        !
                    293:     endif ;
                    294: 
                    295: : create-type { addr u xt1 xt2 n stack -- } ( "prefix" -- )
1.49      anton     296:     \ describes a type
                    297:     \ addr u specifies the C type name
                    298:     \ stack effect entries of the type start with prefix
                    299:     create type% %allot >r
                    300:     addr u save-mem r@ type-c-name 2!
                    301:     xt1   r@ type-fetch !
                    302:     xt2   r@ type-store !
                    303:     n     r@ type-size !
                    304:     stack r@ type-stack !
                    305:     rdrop ;
1.1       anton     306: 
1.54      anton     307: : type-prefix ( xt1 xt2 n stack "prefix" -- )
1.50      anton     308:     create-type
                    309: does> ( item -- )
                    310:     \ initialize item
                    311:     { item typ }
                    312:     typ item item-type !
                    313:     typ type-stack @ item item-stack !default
                    314:     item item-name 2@ items @ search-wordlist 0= if \ new name
1.66      anton     315:        item item-name 2@ nextname item declare
                    316:        item item-first on
                    317:        \ typ type-c-name 2@ type space type  ." ;" cr
1.50      anton     318:     else
                    319:        drop
1.66      anton     320:        item item-first off
1.50      anton     321:     endif ;
                    322: 
                    323: : execute-prefix ( item addr1 u1 -- )
                    324:     \ execute the word ( item -- ) associated with the longest prefix
                    325:     \ of addr1 u1
                    326:     0 swap ?do
                    327:        dup i prefixes search-wordlist
                    328:        if \ ok, we have the type ( item addr1 xt )
                    329:            nip execute
                    330:            UNLOOP EXIT
                    331:        endif
                    332:        -1 s+loop
                    333:     \ we did not find a type, abort
                    334:     true abort" unknown prefix" ;
1.1       anton     335: 
                    336: : declaration ( item -- )
1.50      anton     337:     dup item-name 2@ execute-prefix ;
1.1       anton     338: 
1.64      anton     339: : declaration-list ( addr1 addr2 -- )
                    340:     ['] declaration map-items ;
                    341: 
                    342: : declarations ( -- )
                    343:  wordlist dup items ! set-current
                    344:  effect-in effect-in-end @ declaration-list
                    345:  effect-out effect-out-end @ declaration-list ;
                    346: 
1.66      anton     347: : print-declaration { item -- }
                    348:     item item-first @ if
                    349:        item item-type @ type-c-name 2@ type space
                    350:        item item-name 2@ type ." ;" cr
                    351:     endif ;
                    352: 
                    353: : print-declarations ( -- )
                    354:     effect-in  effect-in-end  @ ['] print-declaration map-items
                    355:     effect-out effect-out-end @ ['] print-declaration map-items ;
                    356:     
1.51      anton     357: : stack-prefix ( stack "prefix" -- )
                    358:     name tuck nextname create ( stack length ) 2,
                    359: does> ( item -- )
                    360:     2@ { item stack prefix-length }
                    361:     item item-name 2@ prefix-length /string item item-name 2!
                    362:     stack item item-stack !
                    363:     item declaration ;
1.1       anton     364: 
                    365: \ offset computation
                    366: \ the leftmost (i.e. deepest) item has offset 0
                    367: \ the rightmost item has the highest offset
                    368: 
1.49      anton     369: : compute-offset { item xt -- }
                    370:     \ xt specifies in/out; update stack-in/out and set item-offset
                    371:     item item-type @ type-size @
                    372:     item item-stack @ xt execute dup @ >r +!
                    373:     r> item item-offset ! ;
                    374: 
1.64      anton     375: : compute-offset-in ( addr1 addr2 -- )
                    376:     ['] stack-in compute-offset ;
                    377: 
                    378: : compute-offset-out ( addr1 addr2 -- )
                    379:     ['] stack-out compute-offset ;
1.49      anton     380: 
                    381: : clear-stack { -- }
                    382:     dup stack-in off stack-out off ;
1.1       anton     383: 
                    384: : compute-offsets ( -- )
1.51      anton     385:     data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
1.53      anton     386:     inst-stream clear-stack
1.64      anton     387:     effect-in  effect-in-end  @ ['] compute-offset-in  map-items
                    388:     effect-out effect-out-end @ ['] compute-offset-out map-items
1.53      anton     389:     inst-stream stack-out @ 0<> abort" # can only be on the input side" ;
1.49      anton     390: 
                    391: : flush-a-tos { stack -- }
                    392:     stack stack-out @ 0<> stack stack-in @ 0= and
                    393:     if
                    394:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    395:        2dup type ." [0] = " type ." TOS);" cr
                    396:     endif ;
1.1       anton     397: 
                    398: : flush-tos ( -- )
1.51      anton     399:     data-stack   flush-a-tos
                    400:     fp-stack     flush-a-tos
                    401:     return-stack flush-a-tos ;
1.49      anton     402: 
                    403: : fill-a-tos { stack -- }
                    404:     stack stack-out @ 0= stack stack-in @ 0<> and
                    405:     if
                    406:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    407:        2dup type ." TOS = " type ." [0]);" cr
                    408:     endif ;
1.1       anton     409: 
                    410: : fill-tos ( -- )
1.53      anton     411:     \ !! inst-stream for prefetching?
1.51      anton     412:     fp-stack     fill-a-tos
                    413:     data-stack   fill-a-tos
                    414:     return-stack fill-a-tos ;
1.49      anton     415: 
                    416: : fetch ( addr -- )
                    417:  dup item-type @ type-fetch @ execute ;
1.1       anton     418: 
                    419: : fetches ( -- )
1.64      anton     420:     effect-in effect-in-end @ ['] fetch map-items ;
1.49      anton     421: 
                    422: : stack-pointer-update { stack -- }
                    423:     \ stack grow downwards
                    424:     stack stack-in @ stack stack-out @ -
                    425:     ?dup-if \ this check is not necessary, gcc would do this for us
                    426:        stack stack-pointer 2@ type ."  += " 0 .r ." ;" cr
                    427:     endif ;
1.1       anton     428: 
1.55      anton     429: : inst-pointer-update ( -- )
                    430:     inst-stream stack-in @ ?dup-if
                    431:        ." INC_IP(" 0 .r ." );" cr
                    432:     endif ;
                    433: 
1.1       anton     434: : stack-pointer-updates ( -- )
1.55      anton     435:     inst-pointer-update
1.51      anton     436:     data-stack   stack-pointer-update
                    437:     fp-stack     stack-pointer-update
                    438:     return-stack stack-pointer-update ;
1.1       anton     439: 
                    440: : store ( item -- )
                    441: \ f is true if the item should be stored
                    442: \ f is false if the store is probably not necessary
1.49      anton     443:  dup item-type @ type-store @ execute ;
1.1       anton     444: 
                    445: : stores ( -- )
1.64      anton     446:     effect-out effect-out-end @ ['] store map-items ;
1.8       pazsan    447: 
1.52      anton     448: : output-c-tail ( -- )
                    449:     \ the final part of the generated C code
                    450:     ." NEXT_P1;" cr
                    451:     stores
                    452:     fill-tos
                    453:     ." NEXT_P2;" cr ;
                    454: 
                    455: : type-c ( c-addr u -- )
                    456:     \ like TYPE, but replaces "TAIL;" with tail code
                    457:     begin ( c-addr1 u1 )
                    458:        2dup s" TAIL;" search
                    459:     while ( c-addr1 u1 c-addr3 u3 )
                    460:        2dup 2>r drop nip over - type
                    461:        output-c-tail
                    462:        2r> 5 /string
                    463:        \ !! resync #line missing
                    464:     repeat
                    465:     2drop type ;
                    466: 
1.63      anton     467: : print-type-prefix ( type -- )
                    468:     body> >head .name ;
                    469: 
                    470: : print-debug-arg { item -- }
                    471:     ." fputs(" quote space item item-name 2@ type ." =" quote ." , vm_out); "
                    472:     ." printarg_" item item-type @ print-type-prefix
                    473:     ." (" item item-name 2@ type ." );" cr ;
                    474:     
                    475: : print-debug-args ( -- )
                    476:     ." #ifdef VM_DEBUG" cr
                    477:     ." if (vm_debug) {" cr
1.64      anton     478:     effect-in effect-in-end @ ['] print-debug-arg map-items
1.63      anton     479:     ." fputc('\n', vm_out);" cr
                    480:     ." }" cr
                    481:     ." #endif" cr ;
                    482:     
1.43      jwilke    483: : output-c ( -- ) 
1.45      anton     484:  ." I_" c-name 2@ type ." :    /* " forth-name 2@ type ."  ( " stack-string 2@ type ." ) */" cr
1.1       anton     485:  ." /* " doc 2@ type ."  */" cr
1.63      anton     486:  ." NAME(" quote forth-name 2@ type quote ." )" cr \ debugging
1.1       anton     487:  ." {" cr
                    488:  ." DEF_CA" cr
                    489:  declarations
                    490:  compute-offsets \ for everything else
1.66      anton     491:  print-declarations
1.13      anton     492:  ." NEXT_P0;" cr
                    493:  flush-tos
1.1       anton     494:  fetches
1.63      anton     495:  print-debug-args
1.13      anton     496:  stack-pointer-updates
1.1       anton     497:  ." {" cr
1.63      anton     498:  ." #line " c-line @ . quote c-filename 2@ type quote cr
1.52      anton     499:  c-code 2@ type-c
1.1       anton     500:  ." }" cr
1.52      anton     501:  output-c-tail
1.1       anton     502:  ." }" cr
                    503:  cr
                    504: ;
                    505: 
1.56      anton     506: : disasm-arg { item -- }
                    507:     item item-stack @ inst-stream = if
1.63      anton     508:        ."   fputc(' ', vm_out); "
                    509:        ." printarg_" item item-type @ print-type-prefix
                    510:        ." ((" item item-type @ type-c-name 2@ type ." )"
                    511:        ." ip[" item item-offset @ 1+ 0 .r ." ]);" cr
1.56      anton     512:     endif ;
                    513: 
                    514: : disasm-args ( -- )
1.64      anton     515:     effect-in effect-in-end @ ['] disasm-arg map-items ;
1.56      anton     516: 
                    517: : output-disasm ( -- )
                    518:     \ generate code for disassembling VM instructions
                    519:     ." if (ip[0] == prim[" function-number @ 0 .r ." ]) {" cr
1.63      anton     520:     ."   fputs(" quote forth-name 2@ type quote ." , vm_out);" cr
1.56      anton     521:     ." /* " declarations ." */" cr
                    522:     compute-offsets
                    523:     disasm-args
                    524:     ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
                    525:     ." } else "
                    526:     1 function-number +! ;
                    527: 
1.60      anton     528: : gen-arg-parm { item -- }
                    529:     item item-stack @ inst-stream = if
                    530:        ." , " item item-type @ type-c-name 2@ type space
                    531:        item item-name 2@ type
                    532:     endif ;
                    533: 
                    534: : gen-args-parm ( -- )
1.64      anton     535:     effect-in effect-in-end @ ['] gen-arg-parm map-items ;
1.60      anton     536: 
                    537: : gen-arg-gen { item -- }
                    538:     item item-stack @ inst-stream = if
                    539:        ."   genarg_" item item-type @ print-type-prefix
                    540:         ." (ctp, " item item-name 2@ type ." );" cr
                    541:     endif ;
                    542: 
                    543: : gen-args-gen ( -- )
1.64      anton     544:     effect-in effect-in-end @ ['] gen-arg-gen map-items ;
1.60      anton     545: 
                    546: : output-gen ( -- )
                    547:     \ generate C code for generating VM instructions
                    548:     ." /* " declarations ." */" cr
                    549:     compute-offsets
                    550:     ." void gen_" c-name 2@ type ." (Inst **ctp" gen-args-parm ." )" cr
                    551:     ." {" cr
                    552:     ."   gen_inst(ctp, vm_prim[" function-number @ 0 .r ." ]);" cr
                    553:     gen-args-gen
                    554:     ." }" cr
                    555:     1 function-number +! ;
                    556: 
1.49      anton     557: : stack-used? { stack -- f }
                    558:     stack stack-in @ stack stack-out @ or 0<> ;
1.44      jwilke    559: 
1.30      pazsan    560: : output-funclabel ( -- )
                    561:   1 function-number +!
                    562:   ." &I_" c-name 2@ type ." ," cr ;
                    563: 
                    564: : output-forthname ( -- )
                    565:   1 function-number +!
                    566:   '" emit forth-name 2@ type '" emit ." ," cr ;
                    567: 
                    568: : output-c-func ( -- )
1.44      jwilke    569: \ used for word libraries
1.30      pazsan    570:     1 function-number +!
1.44      jwilke    571:     ." Cell * I_" c-name 2@ type ." (Cell *SP, Cell **FP)      /* " forth-name 2@ type
1.30      pazsan    572:     ."  ( " stack-string 2@ type ."  ) */" cr
                    573:     ." /* " doc 2@ type ."  */" cr
1.63      anton     574:     ." NAME(" quote forth-name 2@ type quote ." )" cr
1.30      pazsan    575:     \ debugging
                    576:     ." {" cr
                    577:     declarations
                    578:     compute-offsets \ for everything else
1.66      anton     579:     print-declarations
1.53      anton     580:     inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
1.51      anton     581:     data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
                    582:     fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
                    583:     return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN
1.30      pazsan    584:     flush-tos
                    585:     fetches
                    586:     stack-pointer-updates
1.49      anton     587:     fp-stack   stack-used? IF ." *FP=fp;" cr THEN
1.30      pazsan    588:     ." {" cr
1.63      anton     589:     ." #line " c-line @ . quote c-filename 2@ type quote cr
1.30      pazsan    590:     c-code 2@ type
                    591:     ." }" cr
                    592:     stores
                    593:     fill-tos
1.44      jwilke    594:     ." return (sp);" cr
1.30      pazsan    595:     ." }" cr
                    596:     cr ;
                    597: 
1.43      jwilke    598: : output-label ( -- )  
1.34      pazsan    599:     ." (Label)&&I_" c-name 2@ type ." ," cr
                    600:     -1 primitive-number +! ;
1.1       anton     601: 
1.43      jwilke    602: : output-alias ( -- ) 
1.38      pazsan    603:     ( primitive-number @ . ." alias " ) ." Primitive " forth-name 2@ type cr
1.34      pazsan    604:     -1 primitive-number +! ;
1.1       anton     605: 
1.43      jwilke    606: : output-forth ( -- )  
1.30      pazsan    607:     forth-code @ 0=
                    608:     IF         \ output-alias
1.28      jwilke    609:        \ this is bad for ec: an alias is compiled if tho word does not exist!
                    610:        \ JAW
1.30      pazsan    611:     ELSE  ." : " forth-name 2@ type ."   ( "
1.49      anton     612:        stack-string 2@ type ." )" cr
1.30      pazsan    613:        forth-code 2@ type cr
                    614:        -1 primitive-number +!
                    615:     THEN ;
1.10      anton     616: 
1.17      anton     617: : output-tag-file ( -- )
                    618:     name-filename 2@ last-name-filename 2@ compare if
                    619:        name-filename 2@ last-name-filename 2!
                    620:        #ff emit cr
                    621:        name-filename 2@ type
                    622:        ." ,0" cr
                    623:     endif ;
                    624: 
                    625: : output-tag ( -- )
                    626:     output-tag-file
                    627:     forth-name 2@ 1+ type
                    628:     127 emit
                    629:     space forth-name 2@ type space
                    630:     1 emit
                    631:     name-line @ 0 .r
                    632:     ." ,0" cr ;
                    633: 
1.10      anton     634: [IFDEF] documentation
                    635: : register-doc ( -- )
                    636:     get-current documentation set-current
                    637:     forth-name 2@ nextname create
                    638:     forth-name 2@ 2,
1.15      anton     639:     stack-string 2@ condition-stack-effect 2,
1.10      anton     640:     wordset 2@ 2,
1.15      anton     641:     c-name 2@ condition-pronounciation 2,
1.10      anton     642:     doc 2@ 2,
                    643:     set-current ;
                    644: [THEN]
1.67    ! anton     645: 
        !           646: 
        !           647: \ the parser
        !           648: 
        !           649: eof-char max-member \ the whole character set + EOF
        !           650: 
        !           651: : getinput ( -- n )
        !           652:  rawinput @ endrawinput @ =
        !           653:  if
        !           654:    eof-char
        !           655:  else
        !           656:    cookedinput @ c@
        !           657:  endif ;
        !           658: 
        !           659: :noname ( n -- )
        !           660:  dup bl > if
        !           661:   emit space
        !           662:  else
        !           663:   .
        !           664:  endif ;
        !           665: print-token !
        !           666: 
        !           667: : testchar? ( set -- f )
        !           668:  getinput member? ;
        !           669: ' testchar? test-vector !
        !           670: 
        !           671: : checksyncline ( -- )
        !           672:     \ when input points to a newline, check if the next line is a
        !           673:     \ sync line.  If it is, perform the appropriate actions.
        !           674:     rawinput @ >r
        !           675:     s" #line " r@ over compare 0<> if
        !           676:        rdrop 1 line +! EXIT
        !           677:     endif
        !           678:     0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
        !           679:     dup c@ bl = if
        !           680:        char+ dup c@ [char] " <> abort" sync line syntax"
        !           681:        char+ dup 100 [char] " scan drop swap 2dup - save-mem filename 2!
        !           682:        char+
        !           683:     endif
        !           684:     dup c@ nl-char <> abort" sync line syntax"
        !           685:     skipsynclines @ if
        !           686:        dup char+ rawinput !
        !           687:        rawinput @ c@ cookedinput @ c!
        !           688:     endif
        !           689:     drop ;
        !           690: 
        !           691: : print-error-line ( -- )
        !           692:     \ print the current line and position
        !           693:     line-start @ endrawinput @ over - 2dup nl-char scan drop nip ( start end )
        !           694:     over - type cr
        !           695:     line-start @ rawinput @ over - typewhite ." ^" cr ;
        !           696:     
        !           697: : ?nextchar ( f -- )
        !           698:     ?not? if
        !           699:        outfile-id >r try
        !           700:            stderr to outfile-id
        !           701:            filename 2@ type ." :" line @ 0 .r ." : syntax error, wrong char:"
        !           702:            getinput . cr
        !           703:            print-error-line
        !           704:            0
        !           705:        recover endtry
        !           706:        r> to outfile-id throw
        !           707:        abort
        !           708:     endif
        !           709:     rawinput @ endrawinput @ <> if
        !           710:        rawinput @ c@
        !           711:        1 chars rawinput +!
        !           712:        1 chars cookedinput +!
        !           713:        nl-char = if
        !           714:            checksyncline
        !           715:            rawinput @ line-start !
        !           716:        endif
        !           717:        rawinput @ c@ cookedinput @ c!
        !           718:     endif ;
        !           719: 
        !           720: : charclass ( set "name" -- )
        !           721:  ['] ?nextchar terminal ;
        !           722: 
        !           723: : .. ( c1 c2 -- set )
        !           724:  ( creates a set that includes the characters c, c1<=c<=c2 )
        !           725:  empty copy-set
        !           726:  swap 1+ rot do
        !           727:   i over add-member
        !           728:  loop ;
        !           729: 
        !           730: : ` ( -- terminal ) ( use: ` c )
        !           731:  ( creates anonymous terminal for the character c )
        !           732:  char singleton ['] ?nextchar make-terminal ;
        !           733: 
        !           734: char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
        !           735: char 0 char 9 ..                                       charclass digit
        !           736: bl singleton tab-char over add-member                  charclass white
        !           737: nl-char singleton eof-char over add-member complement  charclass nonl
        !           738: nl-char singleton eof-char over add-member
        !           739:     char : over add-member complement                   charclass nocolonnl
        !           740: bl 1+ maxchar .. char \ singleton complement intersection
        !           741:                                                         charclass nowhitebq
        !           742: bl 1+ maxchar ..                                        charclass nowhite
        !           743: char " singleton eof-char over add-member complement   charclass noquote
        !           744: nl-char singleton                                      charclass nl
        !           745: eof-char singleton                                     charclass eof
        !           746: 
        !           747: 
        !           748: (( letter (( letter || digit )) **
        !           749: )) <- c-ident ( -- )
        !           750: 
        !           751: (( ` # ?? (( letter || digit || ` : )) **
        !           752: )) <- stack-ident ( -- )
        !           753: 
        !           754: (( nowhitebq nowhite ** ))
        !           755: <- forth-ident ( -- )
        !           756: 
        !           757: Variable forth-flag
        !           758: Variable c-flag
        !           759: 
        !           760: (( (( ` e || ` E )) {{ start }} nonl ** 
        !           761:    {{ end evaluate }}
        !           762: )) <- eval-comment ( ... -- ... )
        !           763: 
        !           764: (( (( ` f || ` F )) {{ start }} nonl ** 
        !           765:    {{ end forth-flag @ IF type cr ELSE 2drop THEN }}
        !           766: )) <- forth-comment ( -- )
        !           767: 
        !           768: (( (( ` c || ` C )) {{ start }} nonl ** 
        !           769:    {{ end c-flag @ IF type cr ELSE 2drop THEN }}
        !           770: )) <- c-comment ( -- )
        !           771: 
        !           772: (( ` - nonl ** {{ 
        !           773:        forth-flag @ IF ." [ELSE]" cr THEN
        !           774:        c-flag @ IF ." #else" cr THEN }}
        !           775: )) <- else-comment
        !           776: 
        !           777: (( ` + {{ start }} nonl ** {{ end
        !           778:        dup
        !           779:        IF      c-flag @
        !           780:                IF    ." #ifdef HAS_" bounds ?DO  I c@ toupper emit  LOOP cr
        !           781:                THEN
        !           782:                forth-flag @
        !           783:                IF  ." has? " type ."  [IF]"  cr THEN
        !           784:        ELSE    2drop
        !           785:            c-flag @      IF  ." #endif"  cr THEN
        !           786:            forth-flag @  IF  ." [THEN]"  cr THEN
        !           787:        THEN }}
        !           788: )) <- if-comment
        !           789: 
        !           790: (( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
        !           791: 
        !           792: (( ` \ comment-body nl )) <- comment ( -- )
        !           793: 
        !           794: (( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
        !           795: <- stack-items
        !           796: 
        !           797: (( {{ effect-in }}  stack-items {{ effect-in-end ! }}
        !           798:    ` - ` - white **
        !           799:    {{ effect-out }} stack-items {{ effect-out-end ! }}
        !           800: )) <- stack-effect ( -- )
        !           801: 
        !           802: (( {{ s" " doc 2! s" " forth-code 2! s" " wordset 2! }}
        !           803:    (( {{ line @ name-line ! filename 2@ name-filename 2! }}
        !           804:       {{ start }} forth-ident {{ end 2dup forth-name 2! c-name 2! }}  white ++
        !           805:       ` ( white ** {{ start }} stack-effect {{ end stack-string 2! }} ` ) white **
        !           806:         (( {{ start }} forth-ident {{ end wordset 2! }} white **
        !           807:           (( {{ start }}  c-ident {{ end c-name 2! }} )) ??
        !           808:        )) ??  nl
        !           809:    ))
        !           810:    (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " white ** nl )) ??
        !           811:    {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl white ** )) ** {{ end c-code 2! skipsynclines on }}
        !           812:    (( ` :  white ** nl
        !           813:       {{ start }} (( nonl ++  nl white ** )) ++ {{ end forth-code 2! }}
        !           814:    )) ?? {{ printprim }}
        !           815:    (( nl || eof ))
        !           816: )) <- primitive ( -- )
        !           817: 
        !           818: (( (( comment || primitive || nl white ** )) ** eof ))
        !           819: parser primitives2something
        !           820: warnings @ [IF]
        !           821: .( parser generated ok ) cr
        !           822: [THEN]
        !           823: 
        !           824: : primfilter ( file-id xt -- )
        !           825: \ fileid is for the input file, xt ( -- ) is for the output word
        !           826:  output !
        !           827:  here dup rawinput ! dup line-start ! cookedinput !
        !           828:  here unused rot read-file throw
        !           829:  dup here + endrawinput !
        !           830:  allot
        !           831:  align
        !           832:  checksyncline
        !           833: \ begin
        !           834: \     getinput dup eof-char = ?EXIT emit true ?nextchar
        !           835: \ again ;
        !           836:  primitives2something ;
1.8       pazsan    837: 
1.1       anton     838: : process-file ( addr u xt -- )
1.17      anton     839:     >r
1.61      anton     840:     save-mem 2dup filename 2!
1.30      pazsan    841:     0 function-number !
1.17      anton     842:     r/o open-file abort" cannot open file"
                    843:     warnings @ if
                    844:        ." ------------ CUT HERE -------------" cr  endif
                    845:     r> primfilter ;
1.30      pazsan    846: 
                    847: : process      ( xt -- )
                    848:     bl word count rot
                    849:     process-file ;

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