Annotation of gforth/prims2x.fs, revision 1.68

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: 
1.30      pazsan    170: Variable function-number 0 function-number !
1.1       anton     171: 
                    172: \ for several reasons stack items of a word are stored in a wordlist
                    173: \ since neither forget nor marker are implemented yet, we make a new
                    174: \ wordlist for every word and store it in the variable items
                    175: variable items
                    176: 
                    177: \ a few more set ops
                    178: 
                    179: : bit-equivalent ( w1 w2 -- w3 )
                    180:  xor invert ;
                    181: 
                    182: : complement ( set1 -- set2 )
                    183:  empty ['] bit-equivalent binary-set-operation ;
                    184: 
                    185: \ types
                    186: 
1.49      anton     187: : stack-access ( n stack -- )
                    188:     \ print a stack access at index n of stack
                    189:     stack-pointer 2@ type
                    190:     dup
                    191:     if
                    192:        ." [" 0 .r ." ]"
                    193:     else
                    194:        drop ." TOS"
                    195:     endif ;
1.1       anton     196: 
1.53      anton     197: : item-in-index { item -- n }
1.49      anton     198:     \ n is the index of item (in the in-effect)
1.53      anton     199:     item item-stack @ dup >r stack-in @ ( in-size r:stack )
                    200:     item r> stack-in-index-xt @ execute ;
1.1       anton     201: 
                    202: : fetch-single ( item -- )
1.49      anton     203:  \ fetch a single stack item from its stack
1.1       anton     204:  >r
1.8       pazsan    205:  r@ item-name 2@ type
                    206:  ."  = (" 
1.1       anton     207:  r@ item-type @ type-c-name 2@ type ." ) "
1.49      anton     208:  r@ item-in-index r@ item-stack @ stack-access
                    209:  ." ;" cr
1.1       anton     210:  rdrop ; 
                    211: 
                    212: : fetch-double ( item -- )
1.49      anton     213:  \ fetch a double stack item from its stack
1.1       anton     214:  >r
1.20      anton     215:  ." FETCH_DCELL("
                    216:  r@ item-name 2@ type ." , "
1.61      anton     217:  r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
                    218:  ." , "                      -1 under+ ." (Cell)" stack-access
1.20      anton     219:  ." );" cr
1.1       anton     220:  rdrop ;
                    221: 
1.49      anton     222: : same-as-in? ( item -- f )
                    223:  \ f is true iff the offset and stack of item is the same as on input
1.1       anton     224:  >r
                    225:  r@ item-name 2@ items @ search-wordlist 0=
1.8       pazsan    226:  abort" bug"
1.1       anton     227:  execute @
                    228:  dup r@ =
                    229:  if \ item first appeared in output
                    230:    drop false
                    231:  else
1.49      anton     232:    dup  item-stack  @ r@ item-stack  @ = 
                    233:    swap item-offset @ r@ item-offset @ = and
1.1       anton     234:  endif
                    235:  rdrop ;
                    236: 
1.49      anton     237: : item-out-index ( item -- n )
                    238:     \ n is the index of item (in the in-effect)
                    239:     >r r@ item-stack @ stack-out @ r> item-offset @ - 1- ;
1.31      pazsan    240: 
1.1       anton     241: : really-store-single ( item -- )
                    242:  >r
1.49      anton     243:  r@ item-out-index r@ item-stack @ stack-access ."  = "
                    244:  r@ item-stack @ stack-cast 2@ type
1.1       anton     245:  r@ item-name 2@ type ." ;"
                    246:  rdrop ;
                    247: 
                    248: : store-single ( item -- )
                    249:  >r
1.49      anton     250:  r@ same-as-in?
1.1       anton     251:  if
1.49      anton     252:    r@ item-in-index 0= r@ item-out-index 0= xor
1.1       anton     253:    if
1.49      anton     254:        ." IF_" r@ item-stack @ stack-pointer 2@ type
                    255:        ." TOS(" r@ really-store-single ." );" cr
1.1       anton     256:    endif
                    257:  else
                    258:    r@ really-store-single cr
                    259:  endif
                    260:  rdrop ;
                    261: 
                    262: : store-double ( item -- )
                    263: \ !! store optimization is not performed, because it is not yet needed
                    264:  >r
1.20      anton     265:  ." STORE_DCELL(" r@ item-name 2@ type ." , "
1.49      anton     266:  r@ item-out-index r@ item-stack @ 2dup stack-access
                    267:  ." , "                       -1 under+ stack-access
1.20      anton     268:  ." );" cr
1.1       anton     269:  rdrop ;
                    270: 
1.54      anton     271: : single ( -- xt1 xt2 n )
                    272:     ['] fetch-single ['] store-single 1 ;
1.1       anton     273: 
1.54      anton     274: : double ( -- xt1 xt2 n )
                    275:     ['] fetch-double ['] store-double 2 ;
1.1       anton     276: 
                    277: : s, ( addr u -- )
                    278: \ allocate a string
                    279:  here swap dup allot move ;
                    280: 
1.50      anton     281: wordlist constant prefixes
                    282: 
                    283: : declare ( addr "name" -- )
                    284: \ remember that there is a stack item at addr called name
                    285:  create , ;
                    286: 
                    287: : !default ( w addr -- )
                    288:     dup @ if
                    289:        2drop \ leave nonzero alone
                    290:     else
                    291:        !
                    292:     endif ;
                    293: 
                    294: : create-type { addr u xt1 xt2 n stack -- } ( "prefix" -- )
1.49      anton     295:     \ describes a type
                    296:     \ addr u specifies the C type name
                    297:     \ stack effect entries of the type start with prefix
                    298:     create type% %allot >r
                    299:     addr u save-mem r@ type-c-name 2!
                    300:     xt1   r@ type-fetch !
                    301:     xt2   r@ type-store !
                    302:     n     r@ type-size !
                    303:     stack r@ type-stack !
                    304:     rdrop ;
1.1       anton     305: 
1.54      anton     306: : type-prefix ( xt1 xt2 n stack "prefix" -- )
1.50      anton     307:     create-type
                    308: does> ( item -- )
                    309:     \ initialize item
                    310:     { item typ }
                    311:     typ item item-type !
                    312:     typ type-stack @ item item-stack !default
                    313:     item item-name 2@ items @ search-wordlist 0= if \ new name
1.66      anton     314:        item item-name 2@ nextname item declare
                    315:        item item-first on
                    316:        \ typ type-c-name 2@ type space type  ." ;" cr
1.50      anton     317:     else
                    318:        drop
1.66      anton     319:        item item-first off
1.50      anton     320:     endif ;
                    321: 
                    322: : execute-prefix ( item addr1 u1 -- )
                    323:     \ execute the word ( item -- ) associated with the longest prefix
                    324:     \ of addr1 u1
                    325:     0 swap ?do
                    326:        dup i prefixes search-wordlist
                    327:        if \ ok, we have the type ( item addr1 xt )
                    328:            nip execute
                    329:            UNLOOP EXIT
                    330:        endif
                    331:        -1 s+loop
                    332:     \ we did not find a type, abort
                    333:     true abort" unknown prefix" ;
1.1       anton     334: 
                    335: : declaration ( item -- )
1.50      anton     336:     dup item-name 2@ execute-prefix ;
1.1       anton     337: 
1.64      anton     338: : declaration-list ( addr1 addr2 -- )
                    339:     ['] declaration map-items ;
                    340: 
                    341: : declarations ( -- )
                    342:  wordlist dup items ! set-current
                    343:  effect-in effect-in-end @ declaration-list
                    344:  effect-out effect-out-end @ declaration-list ;
                    345: 
1.66      anton     346: : print-declaration { item -- }
                    347:     item item-first @ if
                    348:        item item-type @ type-c-name 2@ type space
                    349:        item item-name 2@ type ." ;" cr
                    350:     endif ;
                    351: 
                    352: : print-declarations ( -- )
                    353:     effect-in  effect-in-end  @ ['] print-declaration map-items
                    354:     effect-out effect-out-end @ ['] print-declaration map-items ;
                    355:     
1.51      anton     356: : stack-prefix ( stack "prefix" -- )
                    357:     name tuck nextname create ( stack length ) 2,
                    358: does> ( item -- )
                    359:     2@ { item stack prefix-length }
                    360:     item item-name 2@ prefix-length /string item item-name 2!
                    361:     stack item item-stack !
                    362:     item declaration ;
1.1       anton     363: 
                    364: \ offset computation
                    365: \ the leftmost (i.e. deepest) item has offset 0
                    366: \ the rightmost item has the highest offset
                    367: 
1.49      anton     368: : compute-offset { item xt -- }
                    369:     \ xt specifies in/out; update stack-in/out and set item-offset
                    370:     item item-type @ type-size @
                    371:     item item-stack @ xt execute dup @ >r +!
                    372:     r> item item-offset ! ;
                    373: 
1.64      anton     374: : compute-offset-in ( addr1 addr2 -- )
                    375:     ['] stack-in compute-offset ;
                    376: 
                    377: : compute-offset-out ( addr1 addr2 -- )
                    378:     ['] stack-out compute-offset ;
1.49      anton     379: 
                    380: : clear-stack { -- }
                    381:     dup stack-in off stack-out off ;
1.1       anton     382: 
                    383: : compute-offsets ( -- )
1.51      anton     384:     data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
1.53      anton     385:     inst-stream clear-stack
1.64      anton     386:     effect-in  effect-in-end  @ ['] compute-offset-in  map-items
                    387:     effect-out effect-out-end @ ['] compute-offset-out map-items
1.53      anton     388:     inst-stream stack-out @ 0<> abort" # can only be on the input side" ;
1.49      anton     389: 
                    390: : flush-a-tos { stack -- }
                    391:     stack stack-out @ 0<> stack stack-in @ 0= and
                    392:     if
                    393:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    394:        2dup type ." [0] = " type ." TOS);" cr
                    395:     endif ;
1.1       anton     396: 
                    397: : flush-tos ( -- )
1.51      anton     398:     data-stack   flush-a-tos
                    399:     fp-stack     flush-a-tos
                    400:     return-stack flush-a-tos ;
1.49      anton     401: 
                    402: : fill-a-tos { stack -- }
                    403:     stack stack-out @ 0= stack stack-in @ 0<> and
                    404:     if
                    405:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    406:        2dup type ." TOS = " type ." [0]);" cr
                    407:     endif ;
1.1       anton     408: 
                    409: : fill-tos ( -- )
1.53      anton     410:     \ !! inst-stream for prefetching?
1.51      anton     411:     fp-stack     fill-a-tos
                    412:     data-stack   fill-a-tos
                    413:     return-stack fill-a-tos ;
1.49      anton     414: 
                    415: : fetch ( addr -- )
                    416:  dup item-type @ type-fetch @ execute ;
1.1       anton     417: 
                    418: : fetches ( -- )
1.64      anton     419:     effect-in effect-in-end @ ['] fetch map-items ;
1.49      anton     420: 
                    421: : stack-pointer-update { stack -- }
                    422:     \ stack grow downwards
                    423:     stack stack-in @ stack stack-out @ -
                    424:     ?dup-if \ this check is not necessary, gcc would do this for us
                    425:        stack stack-pointer 2@ type ."  += " 0 .r ." ;" cr
                    426:     endif ;
1.1       anton     427: 
1.55      anton     428: : inst-pointer-update ( -- )
                    429:     inst-stream stack-in @ ?dup-if
                    430:        ." INC_IP(" 0 .r ." );" cr
                    431:     endif ;
                    432: 
1.1       anton     433: : stack-pointer-updates ( -- )
1.55      anton     434:     inst-pointer-update
1.51      anton     435:     data-stack   stack-pointer-update
                    436:     fp-stack     stack-pointer-update
                    437:     return-stack stack-pointer-update ;
1.1       anton     438: 
                    439: : store ( item -- )
                    440: \ f is true if the item should be stored
                    441: \ f is false if the store is probably not necessary
1.49      anton     442:  dup item-type @ type-store @ execute ;
1.1       anton     443: 
                    444: : stores ( -- )
1.64      anton     445:     effect-out effect-out-end @ ['] store map-items ;
1.8       pazsan    446: 
1.52      anton     447: : output-c-tail ( -- )
                    448:     \ the final part of the generated C code
                    449:     ." NEXT_P1;" cr
                    450:     stores
                    451:     fill-tos
                    452:     ." NEXT_P2;" cr ;
                    453: 
                    454: : type-c ( c-addr u -- )
                    455:     \ like TYPE, but replaces "TAIL;" with tail code
                    456:     begin ( c-addr1 u1 )
                    457:        2dup s" TAIL;" search
                    458:     while ( c-addr1 u1 c-addr3 u3 )
                    459:        2dup 2>r drop nip over - type
                    460:        output-c-tail
                    461:        2r> 5 /string
                    462:        \ !! resync #line missing
                    463:     repeat
                    464:     2drop type ;
                    465: 
1.63      anton     466: : print-type-prefix ( type -- )
                    467:     body> >head .name ;
                    468: 
                    469: : print-debug-arg { item -- }
                    470:     ." fputs(" quote space item item-name 2@ type ." =" quote ." , vm_out); "
                    471:     ." printarg_" item item-type @ print-type-prefix
                    472:     ." (" item item-name 2@ type ." );" cr ;
                    473:     
                    474: : print-debug-args ( -- )
                    475:     ." #ifdef VM_DEBUG" cr
                    476:     ." if (vm_debug) {" cr
1.64      anton     477:     effect-in effect-in-end @ ['] print-debug-arg map-items
1.63      anton     478:     ." fputc('\n', vm_out);" cr
                    479:     ." }" cr
                    480:     ." #endif" cr ;
                    481:     
1.43      jwilke    482: : output-c ( -- ) 
1.45      anton     483:  ." I_" c-name 2@ type ." :    /* " forth-name 2@ type ."  ( " stack-string 2@ type ." ) */" cr
1.1       anton     484:  ." /* " doc 2@ type ."  */" cr
1.63      anton     485:  ." NAME(" quote forth-name 2@ type quote ." )" cr \ debugging
1.1       anton     486:  ." {" cr
                    487:  ." DEF_CA" cr
1.66      anton     488:  print-declarations
1.13      anton     489:  ." NEXT_P0;" cr
                    490:  flush-tos
1.1       anton     491:  fetches
1.63      anton     492:  print-debug-args
1.13      anton     493:  stack-pointer-updates
1.1       anton     494:  ." {" cr
1.63      anton     495:  ." #line " c-line @ . quote c-filename 2@ type quote cr
1.52      anton     496:  c-code 2@ type-c
1.1       anton     497:  ." }" cr
1.52      anton     498:  output-c-tail
1.1       anton     499:  ." }" cr
                    500:  cr
                    501: ;
                    502: 
1.56      anton     503: : disasm-arg { item -- }
                    504:     item item-stack @ inst-stream = if
1.63      anton     505:        ."   fputc(' ', vm_out); "
                    506:        ." printarg_" item item-type @ print-type-prefix
                    507:        ." ((" item item-type @ type-c-name 2@ type ." )"
                    508:        ." ip[" item item-offset @ 1+ 0 .r ." ]);" cr
1.56      anton     509:     endif ;
                    510: 
                    511: : disasm-args ( -- )
1.64      anton     512:     effect-in effect-in-end @ ['] disasm-arg map-items ;
1.56      anton     513: 
                    514: : output-disasm ( -- )
                    515:     \ generate code for disassembling VM instructions
                    516:     ." if (ip[0] == prim[" function-number @ 0 .r ." ]) {" cr
1.63      anton     517:     ."   fputs(" quote forth-name 2@ type quote ." , vm_out);" cr
1.56      anton     518:     disasm-args
                    519:     ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
1.68    ! anton     520:     ." } else " ;
1.56      anton     521: 
1.60      anton     522: : gen-arg-parm { item -- }
                    523:     item item-stack @ inst-stream = if
                    524:        ." , " item item-type @ type-c-name 2@ type space
                    525:        item item-name 2@ type
                    526:     endif ;
                    527: 
                    528: : gen-args-parm ( -- )
1.64      anton     529:     effect-in effect-in-end @ ['] gen-arg-parm map-items ;
1.60      anton     530: 
                    531: : gen-arg-gen { item -- }
                    532:     item item-stack @ inst-stream = if
                    533:        ."   genarg_" item item-type @ print-type-prefix
                    534:         ." (ctp, " item item-name 2@ type ." );" cr
                    535:     endif ;
                    536: 
                    537: : gen-args-gen ( -- )
1.64      anton     538:     effect-in effect-in-end @ ['] gen-arg-gen map-items ;
1.60      anton     539: 
                    540: : output-gen ( -- )
                    541:     \ generate C code for generating VM instructions
                    542:     ." void gen_" c-name 2@ type ." (Inst **ctp" gen-args-parm ." )" cr
                    543:     ." {" cr
                    544:     ."   gen_inst(ctp, vm_prim[" function-number @ 0 .r ." ]);" cr
                    545:     gen-args-gen
1.68    ! anton     546:     ." }" cr ;
1.60      anton     547: 
1.49      anton     548: : stack-used? { stack -- f }
                    549:     stack stack-in @ stack stack-out @ or 0<> ;
1.44      jwilke    550: 
1.30      pazsan    551: : output-funclabel ( -- )
                    552:   ." &I_" c-name 2@ type ." ," cr ;
                    553: 
                    554: : output-forthname ( -- )
                    555:   '" emit forth-name 2@ type '" emit ." ," cr ;
                    556: 
                    557: : output-c-func ( -- )
1.44      jwilke    558: \ used for word libraries
                    559:     ." Cell * I_" c-name 2@ type ." (Cell *SP, Cell **FP)      /* " forth-name 2@ type
1.30      pazsan    560:     ."  ( " stack-string 2@ type ."  ) */" cr
                    561:     ." /* " doc 2@ type ."  */" cr
1.63      anton     562:     ." NAME(" quote forth-name 2@ type quote ." )" cr
1.30      pazsan    563:     \ debugging
                    564:     ." {" cr
1.66      anton     565:     print-declarations
1.53      anton     566:     inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
1.51      anton     567:     data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
                    568:     fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
                    569:     return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN
1.30      pazsan    570:     flush-tos
                    571:     fetches
                    572:     stack-pointer-updates
1.49      anton     573:     fp-stack   stack-used? IF ." *FP=fp;" cr THEN
1.30      pazsan    574:     ." {" cr
1.63      anton     575:     ." #line " c-line @ . quote c-filename 2@ type quote cr
1.30      pazsan    576:     c-code 2@ type
                    577:     ." }" cr
                    578:     stores
                    579:     fill-tos
1.44      jwilke    580:     ." return (sp);" cr
1.30      pazsan    581:     ." }" cr
                    582:     cr ;
                    583: 
1.43      jwilke    584: : output-label ( -- )  
1.68    ! anton     585:     ." (Label)&&I_" c-name 2@ type ." ," cr ;
1.1       anton     586: 
1.43      jwilke    587: : output-alias ( -- ) 
1.68    ! anton     588:     ( primitive-number @ . ." alias " ) ." Primitive " forth-name 2@ type cr ;
1.1       anton     589: 
1.43      jwilke    590: : output-forth ( -- )  
1.30      pazsan    591:     forth-code @ 0=
                    592:     IF         \ output-alias
1.28      jwilke    593:        \ this is bad for ec: an alias is compiled if tho word does not exist!
                    594:        \ JAW
1.30      pazsan    595:     ELSE  ." : " forth-name 2@ type ."   ( "
1.49      anton     596:        stack-string 2@ type ." )" cr
1.30      pazsan    597:        forth-code 2@ type cr
                    598:     THEN ;
1.10      anton     599: 
1.17      anton     600: : output-tag-file ( -- )
                    601:     name-filename 2@ last-name-filename 2@ compare if
                    602:        name-filename 2@ last-name-filename 2!
                    603:        #ff emit cr
                    604:        name-filename 2@ type
                    605:        ." ,0" cr
                    606:     endif ;
                    607: 
                    608: : output-tag ( -- )
                    609:     output-tag-file
                    610:     forth-name 2@ 1+ type
                    611:     127 emit
                    612:     space forth-name 2@ type space
                    613:     1 emit
                    614:     name-line @ 0 .r
                    615:     ." ,0" cr ;
                    616: 
1.10      anton     617: [IFDEF] documentation
                    618: : register-doc ( -- )
                    619:     get-current documentation set-current
                    620:     forth-name 2@ nextname create
                    621:     forth-name 2@ 2,
1.15      anton     622:     stack-string 2@ condition-stack-effect 2,
1.10      anton     623:     wordset 2@ 2,
1.15      anton     624:     c-name 2@ condition-pronounciation 2,
1.10      anton     625:     doc 2@ 2,
                    626:     set-current ;
                    627: [THEN]
1.67      anton     628: 
                    629: 
                    630: \ the parser
                    631: 
                    632: eof-char max-member \ the whole character set + EOF
                    633: 
                    634: : getinput ( -- n )
                    635:  rawinput @ endrawinput @ =
                    636:  if
                    637:    eof-char
                    638:  else
                    639:    cookedinput @ c@
                    640:  endif ;
                    641: 
                    642: :noname ( n -- )
                    643:  dup bl > if
                    644:   emit space
                    645:  else
                    646:   .
                    647:  endif ;
                    648: print-token !
                    649: 
                    650: : testchar? ( set -- f )
                    651:  getinput member? ;
                    652: ' testchar? test-vector !
                    653: 
                    654: : checksyncline ( -- )
                    655:     \ when input points to a newline, check if the next line is a
                    656:     \ sync line.  If it is, perform the appropriate actions.
                    657:     rawinput @ >r
                    658:     s" #line " r@ over compare 0<> if
                    659:        rdrop 1 line +! EXIT
                    660:     endif
                    661:     0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
                    662:     dup c@ bl = if
                    663:        char+ dup c@ [char] " <> abort" sync line syntax"
                    664:        char+ dup 100 [char] " scan drop swap 2dup - save-mem filename 2!
                    665:        char+
                    666:     endif
                    667:     dup c@ nl-char <> abort" sync line syntax"
                    668:     skipsynclines @ if
                    669:        dup char+ rawinput !
                    670:        rawinput @ c@ cookedinput @ c!
                    671:     endif
                    672:     drop ;
                    673: 
                    674: : print-error-line ( -- )
                    675:     \ print the current line and position
                    676:     line-start @ endrawinput @ over - 2dup nl-char scan drop nip ( start end )
                    677:     over - type cr
                    678:     line-start @ rawinput @ over - typewhite ." ^" cr ;
                    679:     
                    680: : ?nextchar ( f -- )
                    681:     ?not? if
                    682:        outfile-id >r try
                    683:            stderr to outfile-id
                    684:            filename 2@ type ." :" line @ 0 .r ." : syntax error, wrong char:"
                    685:            getinput . cr
                    686:            print-error-line
                    687:            0
                    688:        recover endtry
                    689:        r> to outfile-id throw
                    690:        abort
                    691:     endif
                    692:     rawinput @ endrawinput @ <> if
                    693:        rawinput @ c@
                    694:        1 chars rawinput +!
                    695:        1 chars cookedinput +!
                    696:        nl-char = if
                    697:            checksyncline
                    698:            rawinput @ line-start !
                    699:        endif
                    700:        rawinput @ c@ cookedinput @ c!
                    701:     endif ;
                    702: 
                    703: : charclass ( set "name" -- )
                    704:  ['] ?nextchar terminal ;
                    705: 
                    706: : .. ( c1 c2 -- set )
                    707:  ( creates a set that includes the characters c, c1<=c<=c2 )
                    708:  empty copy-set
                    709:  swap 1+ rot do
                    710:   i over add-member
                    711:  loop ;
                    712: 
                    713: : ` ( -- terminal ) ( use: ` c )
                    714:  ( creates anonymous terminal for the character c )
                    715:  char singleton ['] ?nextchar make-terminal ;
                    716: 
                    717: char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
                    718: char 0 char 9 ..                                       charclass digit
                    719: bl singleton tab-char over add-member                  charclass white
                    720: nl-char singleton eof-char over add-member complement  charclass nonl
                    721: nl-char singleton eof-char over add-member
                    722:     char : over add-member complement                   charclass nocolonnl
                    723: bl 1+ maxchar .. char \ singleton complement intersection
                    724:                                                         charclass nowhitebq
                    725: bl 1+ maxchar ..                                        charclass nowhite
                    726: char " singleton eof-char over add-member complement   charclass noquote
                    727: nl-char singleton                                      charclass nl
                    728: eof-char singleton                                     charclass eof
                    729: 
                    730: 
                    731: (( letter (( letter || digit )) **
                    732: )) <- c-ident ( -- )
                    733: 
                    734: (( ` # ?? (( letter || digit || ` : )) **
                    735: )) <- stack-ident ( -- )
                    736: 
                    737: (( nowhitebq nowhite ** ))
                    738: <- forth-ident ( -- )
                    739: 
                    740: Variable forth-flag
                    741: Variable c-flag
                    742: 
                    743: (( (( ` e || ` E )) {{ start }} nonl ** 
                    744:    {{ end evaluate }}
                    745: )) <- eval-comment ( ... -- ... )
                    746: 
                    747: (( (( ` f || ` F )) {{ start }} nonl ** 
                    748:    {{ end forth-flag @ IF type cr ELSE 2drop THEN }}
                    749: )) <- forth-comment ( -- )
                    750: 
                    751: (( (( ` c || ` C )) {{ start }} nonl ** 
                    752:    {{ end c-flag @ IF type cr ELSE 2drop THEN }}
                    753: )) <- c-comment ( -- )
                    754: 
                    755: (( ` - nonl ** {{ 
                    756:        forth-flag @ IF ." [ELSE]" cr THEN
                    757:        c-flag @ IF ." #else" cr THEN }}
                    758: )) <- else-comment
                    759: 
                    760: (( ` + {{ start }} nonl ** {{ end
                    761:        dup
                    762:        IF      c-flag @
                    763:                IF    ." #ifdef HAS_" bounds ?DO  I c@ toupper emit  LOOP cr
                    764:                THEN
                    765:                forth-flag @
                    766:                IF  ." has? " type ."  [IF]"  cr THEN
                    767:        ELSE    2drop
                    768:            c-flag @      IF  ." #endif"  cr THEN
                    769:            forth-flag @  IF  ." [THEN]"  cr THEN
                    770:        THEN }}
                    771: )) <- if-comment
                    772: 
                    773: (( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
                    774: 
                    775: (( ` \ comment-body nl )) <- comment ( -- )
                    776: 
                    777: (( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
                    778: <- stack-items
                    779: 
                    780: (( {{ effect-in }}  stack-items {{ effect-in-end ! }}
                    781:    ` - ` - white **
                    782:    {{ effect-out }} stack-items {{ effect-out-end ! }}
                    783: )) <- stack-effect ( -- )
                    784: 
                    785: (( {{ s" " doc 2! s" " forth-code 2! s" " wordset 2! }}
                    786:    (( {{ line @ name-line ! filename 2@ name-filename 2! }}
                    787:       {{ start }} forth-ident {{ end 2dup forth-name 2! c-name 2! }}  white ++
                    788:       ` ( white ** {{ start }} stack-effect {{ end stack-string 2! }} ` ) white **
                    789:         (( {{ start }} forth-ident {{ end wordset 2! }} white **
                    790:           (( {{ start }}  c-ident {{ end c-name 2! }} )) ??
                    791:        )) ??  nl
                    792:    ))
                    793:    (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " white ** nl )) ??
                    794:    {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl white ** )) ** {{ end c-code 2! skipsynclines on }}
                    795:    (( ` :  white ** nl
                    796:       {{ start }} (( nonl ++  nl white ** )) ++ {{ end forth-code 2! }}
1.68    ! anton     797:    )) ?? {{  declarations compute-offsets printprim 1 function-number +! }}
1.67      anton     798:    (( nl || eof ))
                    799: )) <- primitive ( -- )
                    800: 
                    801: (( (( comment || primitive || nl white ** )) ** eof ))
                    802: parser primitives2something
                    803: warnings @ [IF]
                    804: .( parser generated ok ) cr
                    805: [THEN]
                    806: 
                    807: : primfilter ( file-id xt -- )
                    808: \ fileid is for the input file, xt ( -- ) is for the output word
                    809:  output !
                    810:  here dup rawinput ! dup line-start ! cookedinput !
                    811:  here unused rot read-file throw
                    812:  dup here + endrawinput !
                    813:  allot
                    814:  align
                    815:  checksyncline
                    816: \ begin
                    817: \     getinput dup eof-char = ?EXIT emit true ?nextchar
                    818: \ again ;
                    819:  primitives2something ;
1.8       pazsan    820: 
1.1       anton     821: : process-file ( addr u xt -- )
1.17      anton     822:     >r
1.61      anton     823:     save-mem 2dup filename 2!
1.30      pazsan    824:     0 function-number !
1.17      anton     825:     r/o open-file abort" cannot open file"
                    826:     warnings @ if
                    827:        ." ------------ CUT HERE -------------" cr  endif
                    828:     r> primfilter ;
1.30      pazsan    829: 
                    830: : process      ( xt -- )
                    831:     bl word count rot
                    832:     process-file ;

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