Annotation of gforth/prims2x.fs, revision 1.65

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
                    107: end-struct item%
                    108: 
                    109: struct%
                    110:     cell% 2* field type-c-name
                    111:     cell%    field type-stack \ default stack
                    112:     cell%    field type-size  \ size of type in stack items
                    113:     cell%    field type-fetch \ xt of fetch code generator ( item -- )
                    114:     cell%    field type-store \ xt of store code generator ( item -- )
                    115: end-struct type%
                    116: 
                    117: : stack-in-index ( in-size item -- in-index )
                    118:     item-offset @ - 1- ;
                    119: 
                    120: : inst-in-index ( in-size item -- in-index )
                    121:     nip dup item-offset @ swap item-type @ type-size @ + 1- ;
                    122: 
1.49      anton     123: : make-stack ( addr-ptr u1 addr-cast u2 "stack-name" -- )
                    124:     create stack% %allot >r
                    125:     save-mem r@ stack-cast 2!
1.53      anton     126:     save-mem r@ stack-pointer 2! 
                    127:     ['] stack-in-index r> stack-in-index-xt ! ;
1.49      anton     128: 
                    129: s" sp" save-mem s" (Cell)" make-stack data-stack 
                    130: s" fp" save-mem s" "       make-stack fp-stack
1.51      anton     131: s" rp" save-mem s" (Cell)" make-stack return-stack
1.62      anton     132: s" IP" save-mem s" error don't use # on results" make-stack inst-stream
1.53      anton     133: ' inst-in-index inst-stream stack-in-index-xt !
1.49      anton     134: \ !! initialize stack-in and stack-out
                    135: 
                    136: \ stack items
                    137: 
                    138: : init-item ( addr u addr1 -- )
                    139:     \ initialize item at addr1 with name addr u
                    140:     \ !! remove stack prefix
                    141:     dup item% %size erase
                    142:     item-name 2! ;
                    143: 
1.64      anton     144: : map-items { addr end xt -- }
                    145:     \ perform xt for all items in array addr...end
                    146:     end addr ?do
                    147:        i xt execute
                    148:     item% %size +loop ;
                    149: 
1.49      anton     150: \ various variables for storing stuff of one primitive
1.1       anton     151: 
                    152: 2variable forth-name
                    153: 2variable wordset
                    154: 2variable c-name
                    155: 2variable doc
                    156: 2variable c-code
                    157: 2variable forth-code
                    158: 2variable stack-string
1.49      anton     159: create effect-in  max-effect item% %size * allot
                    160: create effect-out max-effect item% %size * allot
1.1       anton     161: variable effect-in-end ( pointer )
                    162: variable effect-out-end ( pointer )
1.17      anton     163: variable c-line
                    164: 2variable c-filename
                    165: variable name-line
                    166: 2variable name-filename
                    167: 2variable last-name-filename
1.1       anton     168: 
1.14      pazsan    169: variable primitive-number -10 primitive-number !
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: \ the parser
                    186: 
                    187: eof-char max-member \ the whole character set + EOF
                    188: 
                    189: : getinput ( -- n )
1.18      anton     190:  rawinput @ endrawinput @ =
1.1       anton     191:  if
1.18      anton     192:    eof-char
1.1       anton     193:  else
1.18      anton     194:    cookedinput @ c@
1.1       anton     195:  endif ;
                    196: 
                    197: :noname ( n -- )
                    198:  dup bl > if
                    199:   emit space
                    200:  else
                    201:   .
                    202:  endif ;
                    203: print-token !
                    204: 
                    205: : testchar? ( set -- f )
                    206:  getinput member? ;
                    207: ' testchar? test-vector !
                    208: 
1.17      anton     209: : checksyncline ( -- )
                    210:     \ when input points to a newline, check if the next line is a
                    211:     \ sync line.  If it is, perform the appropriate actions.
1.18      anton     212:     rawinput @ >r
1.17      anton     213:     s" #line " r@ over compare 0<> if
                    214:        rdrop 1 line +! EXIT
                    215:     endif
                    216:     0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
                    217:     dup c@ bl = if
                    218:        char+ dup c@ [char] " <> abort" sync line syntax"
1.24      anton     219:        char+ dup 100 [char] " scan drop swap 2dup - save-mem filename 2!
1.17      anton     220:        char+
                    221:     endif
                    222:     dup c@ nl-char <> abort" sync line syntax"
                    223:     skipsynclines @ if
1.18      anton     224:        dup char+ rawinput !
                    225:        rawinput @ c@ cookedinput @ c!
1.17      anton     226:     endif
                    227:     drop ;
                    228: 
1.65    ! anton     229: : print-error-line ( -- )
        !           230:     \ print the current line and position
        !           231:     line-start @ endrawinput @ over - 2dup nl-char scan drop nip ( start end )
        !           232:     over - type cr
        !           233:     line-start @ rawinput @ over - typewhite ." ^" cr ;
        !           234:     
1.1       anton     235: : ?nextchar ( f -- )
1.17      anton     236:     ?not? if
1.65    ! anton     237:        outfile-id >r try
        !           238:            stderr to outfile-id
        !           239:            filename 2@ type ." :" line @ 0 .r ." : syntax error, wrong char:"
        !           240:            getinput . cr
        !           241:            print-error-line
        !           242:            0
        !           243:        recover endtry
        !           244:        r> to outfile-id throw
1.17      anton     245:        abort
                    246:     endif
1.18      anton     247:     rawinput @ endrawinput @ <> if
                    248:        rawinput @ c@
                    249:        1 chars rawinput +!
                    250:        1 chars cookedinput +!
1.17      anton     251:        nl-char = if
                    252:            checksyncline
1.65    ! anton     253:            rawinput @ line-start !
1.17      anton     254:        endif
1.18      anton     255:        rawinput @ c@ cookedinput @ c!
1.17      anton     256:     endif ;
1.1       anton     257: 
                    258: : charclass ( set "name" -- )
                    259:  ['] ?nextchar terminal ;
                    260: 
                    261: : .. ( c1 c2 -- set )
                    262:  ( creates a set that includes the characters c, c1<=c<=c2 )
                    263:  empty copy-set
                    264:  swap 1+ rot do
                    265:   i over add-member
                    266:  loop ;
                    267: 
                    268: : ` ( -- terminal ) ( use: ` c )
                    269:  ( creates anonymous terminal for the character c )
1.21      anton     270:  char singleton ['] ?nextchar make-terminal ;
1.1       anton     271: 
                    272: char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
                    273: char 0 char 9 ..                                       charclass digit
1.45      anton     274: bl singleton tab-char over add-member                  charclass white
1.1       anton     275: nl-char singleton eof-char over add-member complement  charclass nonl
1.46      pazsan    276: nl-char singleton eof-char over add-member
                    277:     char : over add-member complement                   charclass nocolonnl
                    278: bl 1+ maxchar .. char \ singleton complement intersection
                    279:                                                         charclass nowhitebq
                    280: bl 1+ maxchar ..                                        charclass nowhite
1.1       anton     281: char " singleton eof-char over add-member complement   charclass noquote
                    282: nl-char singleton                                      charclass nl
                    283: eof-char singleton                                     charclass eof
                    284: 
                    285: 
                    286: (( letter (( letter || digit )) **
1.51      anton     287: )) <- c-ident ( -- )
                    288: 
                    289: (( ` # ?? (( letter || digit || ` : )) **
                    290: )) <- stack-ident ( -- )
1.1       anton     291: 
1.46      pazsan    292: (( nowhitebq nowhite ** ))
1.51      anton     293: <- forth-ident ( -- )
1.1       anton     294: 
1.42      jwilke    295: Variable forth-flag
                    296: Variable c-flag
                    297: 
1.54      anton     298: (( (( ` e || ` E )) {{ start }} nonl ** 
                    299:    {{ end evaluate }}
                    300: )) <- eval-comment ( ... -- ... )
                    301: 
1.42      jwilke    302: (( (( ` f || ` F )) {{ start }} nonl ** 
                    303:    {{ end forth-flag @ IF type cr ELSE 2drop THEN }}
                    304: )) <- forth-comment ( -- )
                    305: 
                    306: (( (( ` c || ` C )) {{ start }} nonl ** 
                    307:    {{ end c-flag @ IF type cr ELSE 2drop THEN }}
                    308: )) <- c-comment ( -- )
                    309: 
1.43      jwilke    310: (( ` - nonl ** {{ 
                    311:        forth-flag @ IF ." [ELSE]" cr THEN
                    312:        c-flag @ IF ." #else" cr THEN }}
                    313: )) <- else-comment
                    314: 
                    315: (( ` + {{ start }} nonl ** {{ end
                    316:        dup
                    317:        IF      c-flag @
                    318:                IF    ." #ifdef HAS_" bounds ?DO  I c@ toupper emit  LOOP cr
                    319:                THEN
                    320:                forth-flag @
                    321:                IF  ." has? " type ."  [IF]"  cr THEN
                    322:        ELSE    2drop
1.46      pazsan    323:            c-flag @      IF  ." #endif"  cr THEN
                    324:            forth-flag @  IF  ." [THEN]"  cr THEN
1.43      jwilke    325:        THEN }}
                    326: )) <- if-comment
                    327: 
1.54      anton     328: (( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
1.42      jwilke    329: 
1.43      jwilke    330: (( ` \ comment-body nl )) <- comment ( -- )
1.1       anton     331: 
1.51      anton     332: (( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
                    333: <- stack-items
                    334: 
                    335: (( {{ effect-in }}  stack-items {{ effect-in-end ! }}
1.45      anton     336:    ` - ` - white **
1.51      anton     337:    {{ effect-out }} stack-items {{ effect-out-end ! }}
1.1       anton     338: )) <- stack-effect ( -- )
                    339: 
1.57      anton     340: (( {{ s" " doc 2! s" " forth-code 2! s" " wordset 2! }}
1.17      anton     341:    (( {{ line @ name-line ! filename 2@ name-filename 2! }}
1.51      anton     342:       {{ start }} forth-ident {{ end 2dup forth-name 2! c-name 2! }}  white ++
1.45      anton     343:       ` ( white ** {{ start }} stack-effect {{ end stack-string 2! }} ` ) white **
1.57      anton     344:         (( {{ start }} forth-ident {{ end wordset 2! }} white **
                    345:           (( {{ start }}  c-ident {{ end c-name 2! }} )) ??
                    346:        )) ??  nl
1.1       anton     347:    ))
1.58      anton     348:    (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " white ** nl )) ??
1.59      anton     349:    {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl white ** )) ** {{ end c-code 2! skipsynclines on }}
1.58      anton     350:    (( ` :  white ** nl
1.59      anton     351:       {{ start }} (( nonl ++  nl white ** )) ++ {{ end forth-code 2! }}
1.46      pazsan    352:    )) ?? {{ printprim }}
1.1       anton     353:    (( nl || eof ))
                    354: )) <- primitive ( -- )
                    355: 
1.59      anton     356: (( (( comment || primitive || nl white ** )) ** eof ))
1.1       anton     357: parser primitives2something
1.3       pazsan    358: warnings @ [IF]
1.1       anton     359: .( parser generated ok ) cr
1.3       pazsan    360: [THEN]
1.1       anton     361: 
                    362: : primfilter ( file-id xt -- )
                    363: \ fileid is for the input file, xt ( -- ) is for the output word
                    364:  output !
1.65    ! anton     365:  here dup rawinput ! dup line-start ! cookedinput !
1.41      anton     366:  here unused rot read-file throw
                    367:  dup here + endrawinput !
                    368:  allot
1.2       pazsan    369:  align
1.17      anton     370:  checksyncline
1.18      anton     371: \ begin
                    372: \     getinput dup eof-char = ?EXIT emit true ?nextchar
                    373: \ again ;
1.1       anton     374:  primitives2something ;
                    375: 
                    376: \ types
                    377: 
1.49      anton     378: : stack-access ( n stack -- )
                    379:     \ print a stack access at index n of stack
                    380:     stack-pointer 2@ type
                    381:     dup
                    382:     if
                    383:        ." [" 0 .r ." ]"
                    384:     else
                    385:        drop ." TOS"
                    386:     endif ;
1.1       anton     387: 
1.53      anton     388: : item-in-index { item -- n }
1.49      anton     389:     \ n is the index of item (in the in-effect)
1.53      anton     390:     item item-stack @ dup >r stack-in @ ( in-size r:stack )
                    391:     item r> stack-in-index-xt @ execute ;
1.1       anton     392: 
                    393: : fetch-single ( item -- )
1.49      anton     394:  \ fetch a single stack item from its stack
1.1       anton     395:  >r
1.8       pazsan    396:  r@ item-name 2@ type
                    397:  ."  = (" 
1.1       anton     398:  r@ item-type @ type-c-name 2@ type ." ) "
1.49      anton     399:  r@ item-in-index r@ item-stack @ stack-access
                    400:  ." ;" cr
1.1       anton     401:  rdrop ; 
                    402: 
                    403: : fetch-double ( item -- )
1.49      anton     404:  \ fetch a double stack item from its stack
1.1       anton     405:  >r
1.20      anton     406:  ." FETCH_DCELL("
                    407:  r@ item-name 2@ type ." , "
1.61      anton     408:  r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
                    409:  ." , "                      -1 under+ ." (Cell)" stack-access
1.20      anton     410:  ." );" cr
1.1       anton     411:  rdrop ;
                    412: 
1.49      anton     413: : same-as-in? ( item -- f )
                    414:  \ f is true iff the offset and stack of item is the same as on input
1.1       anton     415:  >r
                    416:  r@ item-name 2@ items @ search-wordlist 0=
1.8       pazsan    417:  abort" bug"
1.1       anton     418:  execute @
                    419:  dup r@ =
                    420:  if \ item first appeared in output
                    421:    drop false
                    422:  else
1.49      anton     423:    dup  item-stack  @ r@ item-stack  @ = 
                    424:    swap item-offset @ r@ item-offset @ = and
1.1       anton     425:  endif
                    426:  rdrop ;
                    427: 
1.49      anton     428: : item-out-index ( item -- n )
                    429:     \ n is the index of item (in the in-effect)
                    430:     >r r@ item-stack @ stack-out @ r> item-offset @ - 1- ;
1.31      pazsan    431: 
1.1       anton     432: : really-store-single ( item -- )
                    433:  >r
1.49      anton     434:  r@ item-out-index r@ item-stack @ stack-access ."  = "
                    435:  r@ item-stack @ stack-cast 2@ type
1.1       anton     436:  r@ item-name 2@ type ." ;"
                    437:  rdrop ;
                    438: 
                    439: : store-single ( item -- )
                    440:  >r
1.49      anton     441:  r@ same-as-in?
1.1       anton     442:  if
1.49      anton     443:    r@ item-in-index 0= r@ item-out-index 0= xor
1.1       anton     444:    if
1.49      anton     445:        ." IF_" r@ item-stack @ stack-pointer 2@ type
                    446:        ." TOS(" r@ really-store-single ." );" cr
1.1       anton     447:    endif
                    448:  else
                    449:    r@ really-store-single cr
                    450:  endif
                    451:  rdrop ;
                    452: 
                    453: : store-double ( item -- )
                    454: \ !! store optimization is not performed, because it is not yet needed
                    455:  >r
1.20      anton     456:  ." STORE_DCELL(" r@ item-name 2@ type ." , "
1.49      anton     457:  r@ item-out-index r@ item-stack @ 2dup stack-access
                    458:  ." , "                       -1 under+ stack-access
1.20      anton     459:  ." );" cr
1.1       anton     460:  rdrop ;
                    461: 
1.54      anton     462: : single ( -- xt1 xt2 n )
                    463:     ['] fetch-single ['] store-single 1 ;
1.1       anton     464: 
1.54      anton     465: : double ( -- xt1 xt2 n )
                    466:     ['] fetch-double ['] store-double 2 ;
1.1       anton     467: 
                    468: : s, ( addr u -- )
                    469: \ allocate a string
                    470:  here swap dup allot move ;
                    471: 
1.50      anton     472: wordlist constant prefixes
                    473: 
                    474: : declare ( addr "name" -- )
                    475: \ remember that there is a stack item at addr called name
                    476:  create , ;
                    477: 
                    478: : !default ( w addr -- )
                    479:     dup @ if
                    480:        2drop \ leave nonzero alone
                    481:     else
                    482:        !
                    483:     endif ;
                    484: 
                    485: : create-type { addr u xt1 xt2 n stack -- } ( "prefix" -- )
1.49      anton     486:     \ describes a type
                    487:     \ addr u specifies the C type name
                    488:     \ stack effect entries of the type start with prefix
                    489:     create type% %allot >r
                    490:     addr u save-mem r@ type-c-name 2!
                    491:     xt1   r@ type-fetch !
                    492:     xt2   r@ type-store !
                    493:     n     r@ type-size !
                    494:     stack r@ type-stack !
                    495:     rdrop ;
1.1       anton     496: 
1.54      anton     497: : type-prefix ( xt1 xt2 n stack "prefix" -- )
1.50      anton     498:     create-type
                    499: does> ( item -- )
                    500:     \ initialize item
                    501:     { item typ }
                    502:     typ item item-type !
                    503:     typ type-stack @ item item-stack !default
                    504:     item item-name 2@ items @ search-wordlist 0= if \ new name
                    505:        item item-name 2@ 2dup nextname item declare
                    506:        typ type-c-name 2@ type space type  ." ;" cr
                    507:     else
                    508:        drop
                    509:     endif ;
                    510: 
                    511: : execute-prefix ( item addr1 u1 -- )
                    512:     \ execute the word ( item -- ) associated with the longest prefix
                    513:     \ of addr1 u1
                    514:     0 swap ?do
                    515:        dup i prefixes search-wordlist
                    516:        if \ ok, we have the type ( item addr1 xt )
                    517:            nip execute
                    518:            UNLOOP EXIT
                    519:        endif
                    520:        -1 s+loop
                    521:     \ we did not find a type, abort
                    522:     true abort" unknown prefix" ;
1.1       anton     523: 
                    524: : declaration ( item -- )
1.50      anton     525:     dup item-name 2@ execute-prefix ;
1.1       anton     526: 
1.64      anton     527: : declaration-list ( addr1 addr2 -- )
                    528:     ['] declaration map-items ;
                    529: 
                    530: : declarations ( -- )
                    531:  wordlist dup items ! set-current
                    532:  effect-in effect-in-end @ declaration-list
                    533:  effect-out effect-out-end @ declaration-list ;
                    534: 
1.51      anton     535: : stack-prefix ( stack "prefix" -- )
                    536:     name tuck nextname create ( stack length ) 2,
                    537: does> ( item -- )
                    538:     2@ { item stack prefix-length }
                    539:     item item-name 2@ prefix-length /string item item-name 2!
                    540:     stack item item-stack !
                    541:     item declaration ;
1.1       anton     542: 
                    543: \ offset computation
                    544: \ the leftmost (i.e. deepest) item has offset 0
                    545: \ the rightmost item has the highest offset
                    546: 
1.49      anton     547: : compute-offset { item xt -- }
                    548:     \ xt specifies in/out; update stack-in/out and set item-offset
                    549:     item item-type @ type-size @
                    550:     item item-stack @ xt execute dup @ >r +!
                    551:     r> item item-offset ! ;
                    552: 
1.64      anton     553: : compute-offset-in ( addr1 addr2 -- )
                    554:     ['] stack-in compute-offset ;
                    555: 
                    556: : compute-offset-out ( addr1 addr2 -- )
                    557:     ['] stack-out compute-offset ;
1.49      anton     558: 
                    559: : clear-stack { -- }
                    560:     dup stack-in off stack-out off ;
1.1       anton     561: 
                    562: : compute-offsets ( -- )
1.51      anton     563:     data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
1.53      anton     564:     inst-stream clear-stack
1.64      anton     565:     effect-in  effect-in-end  @ ['] compute-offset-in  map-items
                    566:     effect-out effect-out-end @ ['] compute-offset-out map-items
1.53      anton     567:     inst-stream stack-out @ 0<> abort" # can only be on the input side" ;
1.49      anton     568: 
                    569: : flush-a-tos { stack -- }
                    570:     stack stack-out @ 0<> stack stack-in @ 0= and
                    571:     if
                    572:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    573:        2dup type ." [0] = " type ." TOS);" cr
                    574:     endif ;
1.1       anton     575: 
                    576: : flush-tos ( -- )
1.51      anton     577:     data-stack   flush-a-tos
                    578:     fp-stack     flush-a-tos
                    579:     return-stack flush-a-tos ;
1.49      anton     580: 
                    581: : fill-a-tos { stack -- }
                    582:     stack stack-out @ 0= stack stack-in @ 0<> and
                    583:     if
                    584:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    585:        2dup type ." TOS = " type ." [0]);" cr
                    586:     endif ;
1.1       anton     587: 
                    588: : fill-tos ( -- )
1.53      anton     589:     \ !! inst-stream for prefetching?
1.51      anton     590:     fp-stack     fill-a-tos
                    591:     data-stack   fill-a-tos
                    592:     return-stack fill-a-tos ;
1.49      anton     593: 
                    594: : fetch ( addr -- )
                    595:  dup item-type @ type-fetch @ execute ;
1.1       anton     596: 
                    597: : fetches ( -- )
1.64      anton     598:     effect-in effect-in-end @ ['] fetch map-items ;
1.49      anton     599: 
                    600: : stack-pointer-update { stack -- }
                    601:     \ stack grow downwards
                    602:     stack stack-in @ stack stack-out @ -
                    603:     ?dup-if \ this check is not necessary, gcc would do this for us
                    604:        stack stack-pointer 2@ type ."  += " 0 .r ." ;" cr
                    605:     endif ;
1.1       anton     606: 
1.55      anton     607: : inst-pointer-update ( -- )
                    608:     inst-stream stack-in @ ?dup-if
                    609:        ." INC_IP(" 0 .r ." );" cr
                    610:     endif ;
                    611: 
1.1       anton     612: : stack-pointer-updates ( -- )
1.55      anton     613:     inst-pointer-update
1.51      anton     614:     data-stack   stack-pointer-update
                    615:     fp-stack     stack-pointer-update
                    616:     return-stack stack-pointer-update ;
1.1       anton     617: 
                    618: : store ( item -- )
                    619: \ f is true if the item should be stored
                    620: \ f is false if the store is probably not necessary
1.49      anton     621:  dup item-type @ type-store @ execute ;
1.1       anton     622: 
                    623: : stores ( -- )
1.64      anton     624:     effect-out effect-out-end @ ['] store map-items ;
1.8       pazsan    625: 
1.52      anton     626: : output-c-tail ( -- )
                    627:     \ the final part of the generated C code
                    628:     ." NEXT_P1;" cr
                    629:     stores
                    630:     fill-tos
                    631:     ." NEXT_P2;" cr ;
                    632: 
                    633: : type-c ( c-addr u -- )
                    634:     \ like TYPE, but replaces "TAIL;" with tail code
                    635:     begin ( c-addr1 u1 )
                    636:        2dup s" TAIL;" search
                    637:     while ( c-addr1 u1 c-addr3 u3 )
                    638:        2dup 2>r drop nip over - type
                    639:        output-c-tail
                    640:        2r> 5 /string
                    641:        \ !! resync #line missing
                    642:     repeat
                    643:     2drop type ;
                    644: 
1.63      anton     645: : print-type-prefix ( type -- )
                    646:     body> >head .name ;
                    647: 
                    648: : print-debug-arg { item -- }
                    649:     ." fputs(" quote space item item-name 2@ type ." =" quote ." , vm_out); "
                    650:     ." printarg_" item item-type @ print-type-prefix
                    651:     ." (" item item-name 2@ type ." );" cr ;
                    652:     
                    653: : print-debug-args ( -- )
                    654:     ." #ifdef VM_DEBUG" cr
                    655:     ." if (vm_debug) {" cr
1.64      anton     656:     effect-in effect-in-end @ ['] print-debug-arg map-items
1.63      anton     657:     ." fputc('\n', vm_out);" cr
                    658:     ." }" cr
                    659:     ." #endif" cr ;
                    660:     
1.43      jwilke    661: : output-c ( -- ) 
1.45      anton     662:  ." I_" c-name 2@ type ." :    /* " forth-name 2@ type ."  ( " stack-string 2@ type ." ) */" cr
1.1       anton     663:  ." /* " doc 2@ type ."  */" cr
1.63      anton     664:  ." NAME(" quote forth-name 2@ type quote ." )" cr \ debugging
1.1       anton     665:  ." {" cr
                    666:  ." DEF_CA" cr
                    667:  declarations
                    668:  compute-offsets \ for everything else
1.13      anton     669:  ." NEXT_P0;" cr
                    670:  flush-tos
1.1       anton     671:  fetches
1.63      anton     672:  print-debug-args
1.13      anton     673:  stack-pointer-updates
1.1       anton     674:  ." {" cr
1.63      anton     675:  ." #line " c-line @ . quote c-filename 2@ type quote cr
1.52      anton     676:  c-code 2@ type-c
1.1       anton     677:  ." }" cr
1.52      anton     678:  output-c-tail
1.1       anton     679:  ." }" cr
                    680:  cr
                    681: ;
                    682: 
1.56      anton     683: : disasm-arg { item -- }
                    684:     item item-stack @ inst-stream = if
1.63      anton     685:        ."   fputc(' ', vm_out); "
                    686:        ." printarg_" item item-type @ print-type-prefix
                    687:        ." ((" item item-type @ type-c-name 2@ type ." )"
                    688:        ." ip[" item item-offset @ 1+ 0 .r ." ]);" cr
1.56      anton     689:     endif ;
                    690: 
                    691: : disasm-args ( -- )
1.64      anton     692:     effect-in effect-in-end @ ['] disasm-arg map-items ;
1.56      anton     693: 
                    694: : output-disasm ( -- )
                    695:     \ generate code for disassembling VM instructions
                    696:     ." if (ip[0] == prim[" function-number @ 0 .r ." ]) {" cr
1.63      anton     697:     ."   fputs(" quote forth-name 2@ type quote ." , vm_out);" cr
1.56      anton     698:     ." /* " declarations ." */" cr
                    699:     compute-offsets
                    700:     disasm-args
                    701:     ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
                    702:     ." } else "
                    703:     1 function-number +! ;
                    704: 
1.60      anton     705: : gen-arg-parm { item -- }
                    706:     item item-stack @ inst-stream = if
                    707:        ." , " item item-type @ type-c-name 2@ type space
                    708:        item item-name 2@ type
                    709:     endif ;
                    710: 
                    711: : gen-args-parm ( -- )
1.64      anton     712:     effect-in effect-in-end @ ['] gen-arg-parm map-items ;
1.60      anton     713: 
                    714: : gen-arg-gen { item -- }
                    715:     item item-stack @ inst-stream = if
                    716:        ."   genarg_" item item-type @ print-type-prefix
                    717:         ." (ctp, " item item-name 2@ type ." );" cr
                    718:     endif ;
                    719: 
                    720: : gen-args-gen ( -- )
1.64      anton     721:     effect-in effect-in-end @ ['] gen-arg-gen map-items ;
1.60      anton     722: 
                    723: : output-gen ( -- )
                    724:     \ generate C code for generating VM instructions
                    725:     ." /* " declarations ." */" cr
                    726:     compute-offsets
                    727:     ." void gen_" c-name 2@ type ." (Inst **ctp" gen-args-parm ." )" cr
                    728:     ." {" cr
                    729:     ."   gen_inst(ctp, vm_prim[" function-number @ 0 .r ." ]);" cr
                    730:     gen-args-gen
                    731:     ." }" cr
                    732:     1 function-number +! ;
                    733: 
1.49      anton     734: : stack-used? { stack -- f }
                    735:     stack stack-in @ stack stack-out @ or 0<> ;
1.44      jwilke    736: 
1.30      pazsan    737: : output-funclabel ( -- )
                    738:   1 function-number +!
                    739:   ." &I_" c-name 2@ type ." ," cr ;
                    740: 
                    741: : output-forthname ( -- )
                    742:   1 function-number +!
                    743:   '" emit forth-name 2@ type '" emit ." ," cr ;
                    744: 
                    745: : output-c-func ( -- )
1.44      jwilke    746: \ used for word libraries
1.30      pazsan    747:     1 function-number +!
1.44      jwilke    748:     ." Cell * I_" c-name 2@ type ." (Cell *SP, Cell **FP)      /* " forth-name 2@ type
1.30      pazsan    749:     ."  ( " stack-string 2@ type ."  ) */" cr
                    750:     ." /* " doc 2@ type ."  */" cr
1.63      anton     751:     ." NAME(" quote forth-name 2@ type quote ." )" cr
1.30      pazsan    752:     \ debugging
                    753:     ." {" cr
                    754:     declarations
                    755:     compute-offsets \ for everything else
1.53      anton     756:     inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
1.51      anton     757:     data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
                    758:     fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
                    759:     return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN
1.30      pazsan    760:     flush-tos
                    761:     fetches
                    762:     stack-pointer-updates
1.49      anton     763:     fp-stack   stack-used? IF ." *FP=fp;" cr THEN
1.30      pazsan    764:     ." {" cr
1.63      anton     765:     ." #line " c-line @ . quote c-filename 2@ type quote cr
1.30      pazsan    766:     c-code 2@ type
                    767:     ." }" cr
                    768:     stores
                    769:     fill-tos
1.44      jwilke    770:     ." return (sp);" cr
1.30      pazsan    771:     ." }" cr
                    772:     cr ;
                    773: 
1.43      jwilke    774: : output-label ( -- )  
1.34      pazsan    775:     ." (Label)&&I_" c-name 2@ type ." ," cr
                    776:     -1 primitive-number +! ;
1.1       anton     777: 
1.43      jwilke    778: : output-alias ( -- ) 
1.38      pazsan    779:     ( primitive-number @ . ." alias " ) ." Primitive " forth-name 2@ type cr
1.34      pazsan    780:     -1 primitive-number +! ;
1.1       anton     781: 
1.43      jwilke    782: : output-forth ( -- )  
1.30      pazsan    783:     forth-code @ 0=
                    784:     IF         \ output-alias
1.28      jwilke    785:        \ this is bad for ec: an alias is compiled if tho word does not exist!
                    786:        \ JAW
1.30      pazsan    787:     ELSE  ." : " forth-name 2@ type ."   ( "
1.49      anton     788:        stack-string 2@ type ." )" cr
1.30      pazsan    789:        forth-code 2@ type cr
                    790:        -1 primitive-number +!
                    791:     THEN ;
1.10      anton     792: 
1.17      anton     793: : output-tag-file ( -- )
                    794:     name-filename 2@ last-name-filename 2@ compare if
                    795:        name-filename 2@ last-name-filename 2!
                    796:        #ff emit cr
                    797:        name-filename 2@ type
                    798:        ." ,0" cr
                    799:     endif ;
                    800: 
                    801: : output-tag ( -- )
                    802:     output-tag-file
                    803:     forth-name 2@ 1+ type
                    804:     127 emit
                    805:     space forth-name 2@ type space
                    806:     1 emit
                    807:     name-line @ 0 .r
                    808:     ." ,0" cr ;
                    809: 
1.10      anton     810: [IFDEF] documentation
                    811: : register-doc ( -- )
                    812:     get-current documentation set-current
                    813:     forth-name 2@ nextname create
                    814:     forth-name 2@ 2,
1.15      anton     815:     stack-string 2@ condition-stack-effect 2,
1.10      anton     816:     wordset 2@ 2,
1.15      anton     817:     c-name 2@ condition-pronounciation 2,
1.10      anton     818:     doc 2@ 2,
                    819:     set-current ;
                    820: [THEN]
1.8       pazsan    821: 
1.1       anton     822: : process-file ( addr u xt -- )
1.17      anton     823:     >r
1.61      anton     824:     save-mem 2dup filename 2!
1.30      pazsan    825:     0 function-number !
1.17      anton     826:     r/o open-file abort" cannot open file"
                    827:     warnings @ if
                    828:        ." ------------ CUT HERE -------------" cr  endif
                    829:     r> primfilter ;
1.30      pazsan    830: 
                    831: : process      ( xt -- )
                    832:     bl word count rot
                    833:     process-file ;

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