Annotation of gforth/prims2x.fs, revision 1.72

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: 
1.71      anton      22: \ This is not very nice (hard limits, no checking, assumes 1 chars = 1).
                     23: \ And it grew even worse when it aged.
1.1       anton      24: 
                     25: \ Optimizations:
                     26: \ superfluous stores are removed. GCC removes the superfluous loads by itself
                     27: \ TOS and FTOS can be kept in register( variable)s.
                     28: \ 
                     29: \ Problems:
                     30: \ The TOS optimization is somewhat hairy. The problems by example:
                     31: \ 1) dup ( w -- w w ): w=TOS; sp-=1; sp[1]=w; TOS=w;
                     32: \    The store is not superfluous although the earlier opt. would think so
                     33: \    Alternatively:    sp[0]=TOS; w=TOS; sp-=1; TOS=w;
                     34: \ 2) ( -- .. ): sp[0] = TOS; ... /* This additional store is necessary */
                     35: \ 3) ( .. -- ): ... TOS = sp[0]; /* as well as this load */
                     36: \ 4) ( -- ): /* but here they are unnecessary */
                     37: \ 5) Words that call NEXT themselves have to be done very carefully.
                     38: \
                     39: \ To do:
1.8       pazsan     40: \ add the store optimization for doubles
1.1       anton      41: \ regarding problem 1 above: It would be better (for over) to implement
                     42: \      the alternative
                     43: 
1.3       pazsan     44: warnings off
                     45: 
1.39      jwilke     46: [IFUNDEF] vocabulary   \ we are executed just with kernel image
                     47:                        \ load the rest that is needed
                     48:                        \ (require fails because this file is needed from a
                     49:                        \ different directory with the wordlibraries)
                     50: include ./search.fs                    
                     51: include ./extend.fs
1.40      anton      52: [THEN]
                     53: 
                     54: [IFUNDEF] environment?
1.39      jwilke     55: include ./environ.fs
                     56: [THEN]
1.25      pazsan     57: 
1.49      anton      58: : struct% struct ; \ struct is redefined in gray
                     59: 
1.39      jwilke     60: include ./gray.fs
1.1       anton      61: 
1.69      anton      62: 32 constant max-effect \ number of things on one side of a stack effect
1.71      anton      63: 4 constant max-stacks  \ the max. number of stacks (including inst-stream).
1.1       anton      64: 255 constant maxchar
                     65: maxchar 1+ constant eof-char
1.17      anton      66: #tab constant tab-char
                     67: #lf constant nl-char
1.1       anton      68: 
1.18      anton      69: variable rawinput \ pointer to next character to be scanned
                     70: variable endrawinput \ pointer to the end of the input (the char after the last)
                     71: variable cookedinput \ pointer to the next char to be parsed
1.17      anton      72: variable line \ line number of char pointed to by input
1.65      anton      73: variable line-start \ pointer to start of current line (for error messages)
                     74: 0 line !
1.17      anton      75: 2variable filename \ filename of original input file
                     76: 0 0 filename 2!
1.25      pazsan     77: 2variable f-comment
                     78: 0 0 f-comment 2!
1.17      anton      79: variable skipsynclines \ are sync lines ("#line ...") invisible to the parser?
                     80: skipsynclines on 
1.1       anton      81: 
1.72    ! anton      82: : th ( addr1 n -- addr2 )
        !            83:     cells + ;
        !            84: 
        !            85: : holds ( addr u -- )
        !            86:     \ like HOLD, but for a string
        !            87:     tuck + swap 0 +do
        !            88:        1- dup c@ hold
        !            89:     loop
        !            90:     drop ;
1.71      anton      91: 
1.1       anton      92: : start ( -- addr )
1.18      anton      93:  cookedinput @ ;
1.1       anton      94: 
                     95: : end ( addr -- addr u )
1.18      anton      96:  cookedinput @ over - ;
1.1       anton      97: 
1.71      anton      98: : print-error-line ( -- )
                     99:     \ print the current line and position
                    100:     line-start @ endrawinput @ over - 2dup nl-char scan drop nip ( start end )
                    101:     over - type cr
                    102:     line-start @ rawinput @ over - typewhite ." ^" cr ;
                    103: 
                    104: : ?print-error { f addr u -- }
                    105:     f ?not? if
                    106:        outfile-id >r try
                    107:            stderr to outfile-id
                    108:            filename 2@ type ." :" line @ 0 .r ." : " addr u type cr
                    109:            print-error-line
                    110:            0
                    111:        recover endtry
                    112:        r> to outfile-id throw
                    113:        abort
                    114:     endif ;
                    115: 
1.63      anton     116: : quote ( -- )
                    117:     [char] " emit ;
                    118: 
1.72    ! anton     119: variable output          \ xt ( -- ) of output word for simple primitives
        !           120: variable output-combined \ xt ( -- ) of output word for combined primitives
1.1       anton     121: 
                    122: : printprim ( -- )
                    123:  output @ execute ;
                    124: 
1.49      anton     125: struct%
1.71      anton     126:     cell%    field stack-number \ the number of this stack
1.49      anton     127:     cell% 2* field stack-pointer \ stackpointer name
1.72    ! anton     128:     cell% 2* field stack-typename \ name for default type of stack items
1.49      anton     129:     cell% 2* field stack-cast \ cast string for assignments to stack elements
1.53      anton     130:     cell%    field stack-in-index-xt \ ( in-size item -- in-index )
1.49      anton     131: end-struct stack%
                    132: 
1.53      anton     133: struct%
                    134:  cell% 2* field item-name   \ name, excluding stack prefixes
                    135:  cell%    field item-stack  \ descriptor for the stack used, 0 is default
                    136:  cell%    field item-type   \ descriptor for the item type
                    137:  cell%    field item-offset \ offset in stack items, 0 for the deepest element
1.66      anton     138:  cell%   field item-first  \ true if this is the first occurence of the item
1.53      anton     139: end-struct item%
                    140: 
                    141: struct%
                    142:     cell% 2* field type-c-name
                    143:     cell%    field type-stack \ default stack
                    144:     cell%    field type-size  \ size of type in stack items
                    145:     cell%    field type-fetch \ xt of fetch code generator ( item -- )
                    146:     cell%    field type-store \ xt of store code generator ( item -- )
                    147: end-struct type%
                    148: 
1.72    ! anton     149: variable next-stack-number 0 next-stack-number !
        !           150: create stacks max-stacks cells allot \ array of stacks
        !           151: 
1.53      anton     152: : stack-in-index ( in-size item -- in-index )
                    153:     item-offset @ - 1- ;
                    154: 
                    155: : inst-in-index ( in-size item -- in-index )
                    156:     nip dup item-offset @ swap item-type @ type-size @ + 1- ;
                    157: 
1.72    ! anton     158: : make-stack ( addr-ptr u1 addr-stack u2 addr-cast u3 "stack-name" -- )
1.49      anton     159:     create stack% %allot >r
1.72    ! anton     160:     r@ stacks next-stack-number @ th !
1.71      anton     161:     next-stack-number @ r@ stack-number !  1 next-stack-number +!
1.49      anton     162:     save-mem r@ stack-cast 2!
1.72    ! anton     163:     save-mem r@ stack-typename 2!
1.53      anton     164:     save-mem r@ stack-pointer 2! 
                    165:     ['] stack-in-index r> stack-in-index-xt ! ;
1.49      anton     166: 
1.72    ! anton     167: s" sp" save-mem s" Cell"  save-mem s" (Cell)" make-stack data-stack 
        !           168: s" fp" save-mem s" Float" save-mem s" "       make-stack fp-stack
        !           169: s" rp" save-mem s" Cell"  save-mem s" (Cell)" make-stack return-stack
        !           170: s" IP" save-mem s" Cell"  save-mem s" error don't use # on results" make-stack inst-stream
1.53      anton     171: ' inst-in-index inst-stream stack-in-index-xt !
1.49      anton     172: \ !! initialize stack-in and stack-out
                    173: 
                    174: \ stack items
                    175: 
                    176: : init-item ( addr u addr1 -- )
                    177:     \ initialize item at addr1 with name addr u
                    178:     \ !! remove stack prefix
                    179:     dup item% %size erase
                    180:     item-name 2! ;
                    181: 
1.64      anton     182: : map-items { addr end xt -- }
                    183:     \ perform xt for all items in array addr...end
                    184:     end addr ?do
                    185:        i xt execute
                    186:     item% %size +loop ;
                    187: 
1.49      anton     188: \ various variables for storing stuff of one primitive
1.1       anton     189: 
1.69      anton     190: struct%
                    191:     cell% 2* field prim-name
                    192:     cell% 2* field prim-wordset
                    193:     cell% 2* field prim-c-name
                    194:     cell% 2* field prim-doc
                    195:     cell% 2* field prim-c-code
                    196:     cell% 2* field prim-forth-code
                    197:     cell% 2* field prim-stack-string
                    198:     item% max-effect * field prim-effect-in
                    199:     item% max-effect * field prim-effect-out
                    200:     cell%    field prim-effect-in-end
                    201:     cell%    field prim-effect-out-end
1.71      anton     202:     cell% max-stacks * field prim-stacks-in  \ number of in items per stack
                    203:     cell% max-stacks * field prim-stacks-out \ number of out items per stack
1.69      anton     204: end-struct prim%
                    205: 
1.70      anton     206: : make-prim ( -- prim )
                    207:     prim% %alloc { p }
                    208:     s" " p prim-doc 2! s" " p prim-forth-code 2! s" " p prim-wordset 2!
                    209:     p ;
                    210: 
                    211: 0 value prim
1.69      anton     212: 
1.71      anton     213: wordlist constant primitives
                    214: 
                    215: : create-prim ( prim -- )
                    216:     get-current >r
                    217:     primitives set-current
                    218:     dup prim-name 2@ nextname constant
                    219:     r> set-current ;
                    220: 
                    221: : stack-in ( stack -- addr )
                    222:     \ address of number of stack items in effect in
                    223:     stack-number @ cells prim prim-stacks-in + ;
                    224: 
                    225: : stack-out ( stack -- addr )
                    226:     \ address of number of stack items in effect out
                    227:     stack-number @ cells prim prim-stacks-out + ;
                    228: 
1.69      anton     229: \ global vars
1.17      anton     230: variable c-line
                    231: 2variable c-filename
                    232: variable name-line
                    233: 2variable name-filename
                    234: 2variable last-name-filename
1.30      pazsan    235: Variable function-number 0 function-number !
1.1       anton     236: 
                    237: \ for several reasons stack items of a word are stored in a wordlist
                    238: \ since neither forget nor marker are implemented yet, we make a new
                    239: \ wordlist for every word and store it in the variable items
                    240: variable items
                    241: 
                    242: \ a few more set ops
                    243: 
                    244: : bit-equivalent ( w1 w2 -- w3 )
                    245:  xor invert ;
                    246: 
                    247: : complement ( set1 -- set2 )
                    248:  empty ['] bit-equivalent binary-set-operation ;
                    249: 
                    250: \ types
                    251: 
1.49      anton     252: : stack-access ( n stack -- )
                    253:     \ print a stack access at index n of stack
                    254:     stack-pointer 2@ type
                    255:     dup
                    256:     if
                    257:        ." [" 0 .r ." ]"
                    258:     else
                    259:        drop ." TOS"
                    260:     endif ;
1.1       anton     261: 
1.53      anton     262: : item-in-index { item -- n }
1.49      anton     263:     \ n is the index of item (in the in-effect)
1.53      anton     264:     item item-stack @ dup >r stack-in @ ( in-size r:stack )
                    265:     item r> stack-in-index-xt @ execute ;
1.1       anton     266: 
                    267: : fetch-single ( item -- )
1.49      anton     268:  \ fetch a single stack item from its stack
1.1       anton     269:  >r
1.8       pazsan    270:  r@ item-name 2@ type
                    271:  ."  = (" 
1.1       anton     272:  r@ item-type @ type-c-name 2@ type ." ) "
1.49      anton     273:  r@ item-in-index r@ item-stack @ stack-access
                    274:  ." ;" cr
1.1       anton     275:  rdrop ; 
                    276: 
                    277: : fetch-double ( item -- )
1.49      anton     278:  \ fetch a double stack item from its stack
1.1       anton     279:  >r
1.20      anton     280:  ." FETCH_DCELL("
                    281:  r@ item-name 2@ type ." , "
1.61      anton     282:  r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
                    283:  ." , "                      -1 under+ ." (Cell)" stack-access
1.20      anton     284:  ." );" cr
1.1       anton     285:  rdrop ;
                    286: 
1.49      anton     287: : same-as-in? ( item -- f )
                    288:  \ f is true iff the offset and stack of item is the same as on input
1.1       anton     289:  >r
                    290:  r@ item-name 2@ items @ search-wordlist 0=
1.8       pazsan    291:  abort" bug"
1.1       anton     292:  execute @
                    293:  dup r@ =
                    294:  if \ item first appeared in output
                    295:    drop false
                    296:  else
1.49      anton     297:    dup  item-stack  @ r@ item-stack  @ = 
                    298:    swap item-offset @ r@ item-offset @ = and
1.1       anton     299:  endif
                    300:  rdrop ;
                    301: 
1.49      anton     302: : item-out-index ( item -- n )
                    303:     \ n is the index of item (in the in-effect)
                    304:     >r r@ item-stack @ stack-out @ r> item-offset @ - 1- ;
1.31      pazsan    305: 
1.1       anton     306: : really-store-single ( item -- )
                    307:  >r
1.49      anton     308:  r@ item-out-index r@ item-stack @ stack-access ."  = "
                    309:  r@ item-stack @ stack-cast 2@ type
1.1       anton     310:  r@ item-name 2@ type ." ;"
                    311:  rdrop ;
                    312: 
                    313: : store-single ( item -- )
                    314:  >r
1.49      anton     315:  r@ same-as-in?
1.1       anton     316:  if
1.49      anton     317:    r@ item-in-index 0= r@ item-out-index 0= xor
1.1       anton     318:    if
1.49      anton     319:        ." IF_" r@ item-stack @ stack-pointer 2@ type
                    320:        ." TOS(" r@ really-store-single ." );" cr
1.1       anton     321:    endif
                    322:  else
                    323:    r@ really-store-single cr
                    324:  endif
                    325:  rdrop ;
                    326: 
                    327: : store-double ( item -- )
                    328: \ !! store optimization is not performed, because it is not yet needed
                    329:  >r
1.20      anton     330:  ." STORE_DCELL(" r@ item-name 2@ type ." , "
1.49      anton     331:  r@ item-out-index r@ item-stack @ 2dup stack-access
                    332:  ." , "                       -1 under+ stack-access
1.20      anton     333:  ." );" cr
1.1       anton     334:  rdrop ;
                    335: 
1.54      anton     336: : single ( -- xt1 xt2 n )
                    337:     ['] fetch-single ['] store-single 1 ;
1.1       anton     338: 
1.54      anton     339: : double ( -- xt1 xt2 n )
                    340:     ['] fetch-double ['] store-double 2 ;
1.1       anton     341: 
                    342: : s, ( addr u -- )
                    343: \ allocate a string
                    344:  here swap dup allot move ;
                    345: 
1.50      anton     346: wordlist constant prefixes
                    347: 
                    348: : declare ( addr "name" -- )
                    349: \ remember that there is a stack item at addr called name
                    350:  create , ;
                    351: 
                    352: : !default ( w addr -- )
                    353:     dup @ if
                    354:        2drop \ leave nonzero alone
                    355:     else
                    356:        !
                    357:     endif ;
                    358: 
                    359: : create-type { addr u xt1 xt2 n stack -- } ( "prefix" -- )
1.49      anton     360:     \ describes a type
                    361:     \ addr u specifies the C type name
                    362:     \ stack effect entries of the type start with prefix
                    363:     create type% %allot >r
                    364:     addr u save-mem r@ type-c-name 2!
                    365:     xt1   r@ type-fetch !
                    366:     xt2   r@ type-store !
                    367:     n     r@ type-size !
                    368:     stack r@ type-stack !
                    369:     rdrop ;
1.1       anton     370: 
1.54      anton     371: : type-prefix ( xt1 xt2 n stack "prefix" -- )
1.50      anton     372:     create-type
                    373: does> ( item -- )
                    374:     \ initialize item
                    375:     { item typ }
                    376:     typ item item-type !
                    377:     typ type-stack @ item item-stack !default
                    378:     item item-name 2@ items @ search-wordlist 0= if \ new name
1.66      anton     379:        item item-name 2@ nextname item declare
                    380:        item item-first on
                    381:        \ typ type-c-name 2@ type space type  ." ;" cr
1.50      anton     382:     else
                    383:        drop
1.66      anton     384:        item item-first off
1.50      anton     385:     endif ;
                    386: 
                    387: : execute-prefix ( item addr1 u1 -- )
                    388:     \ execute the word ( item -- ) associated with the longest prefix
                    389:     \ of addr1 u1
                    390:     0 swap ?do
                    391:        dup i prefixes search-wordlist
                    392:        if \ ok, we have the type ( item addr1 xt )
                    393:            nip execute
                    394:            UNLOOP EXIT
                    395:        endif
                    396:        -1 s+loop
                    397:     \ we did not find a type, abort
                    398:     true abort" unknown prefix" ;
1.1       anton     399: 
                    400: : declaration ( item -- )
1.50      anton     401:     dup item-name 2@ execute-prefix ;
1.1       anton     402: 
1.64      anton     403: : declaration-list ( addr1 addr2 -- )
                    404:     ['] declaration map-items ;
                    405: 
                    406: : declarations ( -- )
                    407:  wordlist dup items ! set-current
1.69      anton     408:  prim prim-effect-in prim prim-effect-in-end @ declaration-list
                    409:  prim prim-effect-out prim prim-effect-out-end @ declaration-list ;
1.64      anton     410: 
1.66      anton     411: : print-declaration { item -- }
                    412:     item item-first @ if
                    413:        item item-type @ type-c-name 2@ type space
                    414:        item item-name 2@ type ." ;" cr
                    415:     endif ;
                    416: 
                    417: : print-declarations ( -- )
1.69      anton     418:     prim prim-effect-in  prim prim-effect-in-end  @ ['] print-declaration map-items
                    419:     prim prim-effect-out prim prim-effect-out-end @ ['] print-declaration map-items ;
1.66      anton     420:     
1.51      anton     421: : stack-prefix ( stack "prefix" -- )
                    422:     name tuck nextname create ( stack length ) 2,
                    423: does> ( item -- )
                    424:     2@ { item stack prefix-length }
                    425:     item item-name 2@ prefix-length /string item item-name 2!
                    426:     stack item item-stack !
                    427:     item declaration ;
1.1       anton     428: 
                    429: \ offset computation
                    430: \ the leftmost (i.e. deepest) item has offset 0
                    431: \ the rightmost item has the highest offset
                    432: 
1.49      anton     433: : compute-offset { item xt -- }
                    434:     \ xt specifies in/out; update stack-in/out and set item-offset
                    435:     item item-type @ type-size @
                    436:     item item-stack @ xt execute dup @ >r +!
                    437:     r> item item-offset ! ;
                    438: 
1.64      anton     439: : compute-offset-in ( addr1 addr2 -- )
                    440:     ['] stack-in compute-offset ;
                    441: 
                    442: : compute-offset-out ( addr1 addr2 -- )
                    443:     ['] stack-out compute-offset ;
1.49      anton     444: 
                    445: : clear-stack { -- }
                    446:     dup stack-in off stack-out off ;
1.1       anton     447: 
                    448: : compute-offsets ( -- )
1.51      anton     449:     data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
1.53      anton     450:     inst-stream clear-stack
1.69      anton     451:     prim prim-effect-in  prim prim-effect-in-end  @ ['] compute-offset-in  map-items
                    452:     prim prim-effect-out prim prim-effect-out-end @ ['] compute-offset-out map-items
1.53      anton     453:     inst-stream stack-out @ 0<> abort" # can only be on the input side" ;
1.49      anton     454: 
                    455: : flush-a-tos { stack -- }
                    456:     stack stack-out @ 0<> stack stack-in @ 0= and
                    457:     if
                    458:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    459:        2dup type ." [0] = " type ." TOS);" cr
                    460:     endif ;
1.1       anton     461: 
                    462: : flush-tos ( -- )
1.51      anton     463:     data-stack   flush-a-tos
                    464:     fp-stack     flush-a-tos
                    465:     return-stack flush-a-tos ;
1.49      anton     466: 
                    467: : fill-a-tos { stack -- }
                    468:     stack stack-out @ 0= stack stack-in @ 0<> and
                    469:     if
                    470:        ." IF_" stack stack-pointer 2@ 2dup type ." TOS("
                    471:        2dup type ." TOS = " type ." [0]);" cr
                    472:     endif ;
1.1       anton     473: 
                    474: : fill-tos ( -- )
1.53      anton     475:     \ !! inst-stream for prefetching?
1.51      anton     476:     fp-stack     fill-a-tos
                    477:     data-stack   fill-a-tos
                    478:     return-stack fill-a-tos ;
1.49      anton     479: 
                    480: : fetch ( addr -- )
1.72    ! anton     481:     dup item-type @ type-fetch @ execute ;
1.1       anton     482: 
                    483: : fetches ( -- )
1.69      anton     484:     prim prim-effect-in prim prim-effect-in-end @ ['] fetch map-items ;
1.49      anton     485: 
                    486: : stack-pointer-update { stack -- }
                    487:     \ stack grow downwards
                    488:     stack stack-in @ stack stack-out @ -
                    489:     ?dup-if \ this check is not necessary, gcc would do this for us
                    490:        stack stack-pointer 2@ type ."  += " 0 .r ." ;" cr
                    491:     endif ;
1.1       anton     492: 
1.55      anton     493: : inst-pointer-update ( -- )
                    494:     inst-stream stack-in @ ?dup-if
                    495:        ." INC_IP(" 0 .r ." );" cr
                    496:     endif ;
                    497: 
1.1       anton     498: : stack-pointer-updates ( -- )
1.55      anton     499:     inst-pointer-update
1.51      anton     500:     data-stack   stack-pointer-update
                    501:     fp-stack     stack-pointer-update
                    502:     return-stack stack-pointer-update ;
1.1       anton     503: 
                    504: : store ( item -- )
                    505: \ f is true if the item should be stored
                    506: \ f is false if the store is probably not necessary
1.49      anton     507:  dup item-type @ type-store @ execute ;
1.1       anton     508: 
                    509: : stores ( -- )
1.69      anton     510:     prim prim-effect-out prim prim-effect-out-end @ ['] store map-items ;
1.8       pazsan    511: 
1.52      anton     512: : output-c-tail ( -- )
                    513:     \ the final part of the generated C code
                    514:     ." NEXT_P1;" cr
                    515:     stores
                    516:     fill-tos
                    517:     ." NEXT_P2;" cr ;
                    518: 
                    519: : type-c ( c-addr u -- )
                    520:     \ like TYPE, but replaces "TAIL;" with tail code
                    521:     begin ( c-addr1 u1 )
                    522:        2dup s" TAIL;" search
                    523:     while ( c-addr1 u1 c-addr3 u3 )
                    524:        2dup 2>r drop nip over - type
                    525:        output-c-tail
                    526:        2r> 5 /string
                    527:        \ !! resync #line missing
                    528:     repeat
                    529:     2drop type ;
                    530: 
1.63      anton     531: : print-type-prefix ( type -- )
                    532:     body> >head .name ;
                    533: 
                    534: : print-debug-arg { item -- }
                    535:     ." fputs(" quote space item item-name 2@ type ." =" quote ." , vm_out); "
                    536:     ." printarg_" item item-type @ print-type-prefix
                    537:     ." (" item item-name 2@ type ." );" cr ;
                    538:     
                    539: : print-debug-args ( -- )
                    540:     ." #ifdef VM_DEBUG" cr
                    541:     ." if (vm_debug) {" cr
1.69      anton     542:     prim prim-effect-in prim prim-effect-in-end @ ['] print-debug-arg map-items
1.63      anton     543:     ." fputc('\n', vm_out);" cr
                    544:     ." }" cr
                    545:     ." #endif" cr ;
1.72    ! anton     546: 
        !           547: : print-entry ( -- )
        !           548:     ." I_" prim prim-c-name 2@ type ." :" ;
1.63      anton     549:     
1.43      jwilke    550: : output-c ( -- ) 
1.72    ! anton     551:  print-entry ."  /* " prim prim-name 2@ type ."  ( " prim prim-stack-string 2@ type ." ) */" cr
1.69      anton     552:  ." /* " prim prim-doc 2@ type ."  */" cr
                    553:  ." NAME(" quote prim prim-name 2@ type quote ." )" cr \ debugging
1.1       anton     554:  ." {" cr
                    555:  ." DEF_CA" cr
1.66      anton     556:  print-declarations
1.13      anton     557:  ." NEXT_P0;" cr
                    558:  flush-tos
1.1       anton     559:  fetches
1.63      anton     560:  print-debug-args
1.13      anton     561:  stack-pointer-updates
1.1       anton     562:  ." {" cr
1.63      anton     563:  ." #line " c-line @ . quote c-filename 2@ type quote cr
1.69      anton     564:  prim prim-c-code 2@ type-c
1.1       anton     565:  ." }" cr
1.52      anton     566:  output-c-tail
1.1       anton     567:  ." }" cr
                    568:  cr
                    569: ;
                    570: 
1.56      anton     571: : disasm-arg { item -- }
                    572:     item item-stack @ inst-stream = if
1.63      anton     573:        ."   fputc(' ', vm_out); "
                    574:        ." printarg_" item item-type @ print-type-prefix
                    575:        ." ((" item item-type @ type-c-name 2@ type ." )"
                    576:        ." ip[" item item-offset @ 1+ 0 .r ." ]);" cr
1.56      anton     577:     endif ;
                    578: 
                    579: : disasm-args ( -- )
1.69      anton     580:     prim prim-effect-in prim prim-effect-in-end @ ['] disasm-arg map-items ;
1.56      anton     581: 
                    582: : output-disasm ( -- )
                    583:     \ generate code for disassembling VM instructions
                    584:     ." if (ip[0] == prim[" function-number @ 0 .r ." ]) {" cr
1.69      anton     585:     ."   fputs(" quote prim prim-name 2@ type quote ." , vm_out);" cr
1.56      anton     586:     disasm-args
                    587:     ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
1.68      anton     588:     ." } else " ;
1.56      anton     589: 
1.60      anton     590: : gen-arg-parm { item -- }
                    591:     item item-stack @ inst-stream = if
                    592:        ." , " item item-type @ type-c-name 2@ type space
                    593:        item item-name 2@ type
                    594:     endif ;
                    595: 
                    596: : gen-args-parm ( -- )
1.69      anton     597:     prim prim-effect-in prim prim-effect-in-end @ ['] gen-arg-parm map-items ;
1.60      anton     598: 
                    599: : gen-arg-gen { item -- }
                    600:     item item-stack @ inst-stream = if
                    601:        ."   genarg_" item item-type @ print-type-prefix
                    602:         ." (ctp, " item item-name 2@ type ." );" cr
                    603:     endif ;
                    604: 
                    605: : gen-args-gen ( -- )
1.69      anton     606:     prim prim-effect-in prim prim-effect-in-end @ ['] gen-arg-gen map-items ;
1.60      anton     607: 
                    608: : output-gen ( -- )
                    609:     \ generate C code for generating VM instructions
1.69      anton     610:     ." void gen_" prim prim-c-name 2@ type ." (Inst **ctp" gen-args-parm ." )" cr
1.60      anton     611:     ." {" cr
                    612:     ."   gen_inst(ctp, vm_prim[" function-number @ 0 .r ." ]);" cr
                    613:     gen-args-gen
1.68      anton     614:     ." }" cr ;
1.60      anton     615: 
1.49      anton     616: : stack-used? { stack -- f }
                    617:     stack stack-in @ stack stack-out @ or 0<> ;
1.44      jwilke    618: 
1.30      pazsan    619: : output-funclabel ( -- )
1.69      anton     620:   ." &I_" prim prim-c-name 2@ type ." ," cr ;
1.30      pazsan    621: 
                    622: : output-forthname ( -- )
1.69      anton     623:   '" emit prim prim-name 2@ type '" emit ." ," cr ;
1.30      pazsan    624: 
                    625: : output-c-func ( -- )
1.44      jwilke    626: \ used for word libraries
1.69      anton     627:     ." Cell * I_" prim prim-c-name 2@ type ." (Cell *SP, Cell **FP)      /* " prim prim-name 2@ type
                    628:     ."  ( " prim prim-stack-string 2@ type ."  ) */" cr
                    629:     ." /* " prim prim-doc 2@ type ."  */" cr
                    630:     ." NAME(" quote prim prim-name 2@ type quote ." )" cr
1.30      pazsan    631:     \ debugging
                    632:     ." {" cr
1.66      anton     633:     print-declarations
1.53      anton     634:     inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
1.51      anton     635:     data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
                    636:     fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
                    637:     return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN
1.30      pazsan    638:     flush-tos
                    639:     fetches
                    640:     stack-pointer-updates
1.49      anton     641:     fp-stack   stack-used? IF ." *FP=fp;" cr THEN
1.30      pazsan    642:     ." {" cr
1.63      anton     643:     ." #line " c-line @ . quote c-filename 2@ type quote cr
1.69      anton     644:     prim prim-c-code 2@ type
1.30      pazsan    645:     ." }" cr
                    646:     stores
                    647:     fill-tos
1.44      jwilke    648:     ." return (sp);" cr
1.30      pazsan    649:     ." }" cr
                    650:     cr ;
                    651: 
1.43      jwilke    652: : output-label ( -- )  
1.69      anton     653:     ." (Label)&&I_" prim prim-c-name 2@ type ." ," cr ;
1.1       anton     654: 
1.43      jwilke    655: : output-alias ( -- ) 
1.69      anton     656:     ( primitive-number @ . ." alias " ) ." Primitive " prim prim-name 2@ type cr ;
1.1       anton     657: 
1.43      jwilke    658: : output-forth ( -- )  
1.69      anton     659:     prim prim-forth-code @ 0=
1.30      pazsan    660:     IF         \ output-alias
1.28      jwilke    661:        \ this is bad for ec: an alias is compiled if tho word does not exist!
                    662:        \ JAW
1.69      anton     663:     ELSE  ." : " prim prim-name 2@ type ."   ( "
                    664:        prim prim-stack-string 2@ type ." )" cr
                    665:        prim prim-forth-code 2@ type cr
1.30      pazsan    666:     THEN ;
1.10      anton     667: 
1.17      anton     668: : output-tag-file ( -- )
                    669:     name-filename 2@ last-name-filename 2@ compare if
                    670:        name-filename 2@ last-name-filename 2!
                    671:        #ff emit cr
                    672:        name-filename 2@ type
                    673:        ." ,0" cr
                    674:     endif ;
                    675: 
                    676: : output-tag ( -- )
                    677:     output-tag-file
1.69      anton     678:     prim prim-name 2@ 1+ type
1.17      anton     679:     127 emit
1.69      anton     680:     space prim prim-name 2@ type space
1.17      anton     681:     1 emit
                    682:     name-line @ 0 .r
                    683:     ." ,0" cr ;
                    684: 
1.10      anton     685: [IFDEF] documentation
                    686: : register-doc ( -- )
                    687:     get-current documentation set-current
1.69      anton     688:     prim prim-name 2@ nextname create
                    689:     prim prim-name 2@ 2,
                    690:     prim prim-stack-string 2@ condition-stack-effect 2,
                    691:     prim prim-wordset 2@ 2,
                    692:     prim prim-c-name 2@ condition-pronounciation 2,
                    693:     prim prim-doc 2@ 2,
1.10      anton     694:     set-current ;
                    695: [THEN]
1.67      anton     696: 
                    697: 
1.69      anton     698: \ combining instructions
                    699: 
                    700: \ The input should look like this:
                    701: 
                    702: \ lit_+ = lit +
                    703: 
                    704: \ The output should look like this:
                    705: 
                    706: \  I_lit_+:
                    707: \  {
                    708: \  DEF_CA
                    709: \  Cell _x_ip0;
                    710: \  Cell _x_sp0;
                    711: \  Cell _x_sp1;
                    712: \  NEXT_P0;
                    713: \  _x_ip0 = (Cell) IPTOS;
                    714: \  _x_sp0 = (Cell) spTOS;
                    715: \  INC_IP(1);
                    716: \  /* sp += 0; */
                    717: \  /* lit ( #w -- w ) */
                    718: \  /*  */
                    719: \  NAME("lit")
                    720: \  {
                    721: \  Cell w;
                    722: \  w = (Cell) _x_ip0;
                    723: \  #ifdef VM_DEBUG
                    724: \  if (vm_debug) {
                    725: \  fputs(" w=", vm_out); printarg_w (w);
                    726: \  fputc('\n', vm_out);
                    727: \  }
                    728: \  #endif
                    729: \  {
                    730: \  #line 136 "./prim"
                    731: \  }
                    732: \  _x_sp1 = (Cell)w;
                    733: \  }
                    734: \  I_plus:     /* + ( n1 n2 -- n ) */
                    735: \  /*  */
                    736: \  NAME("+")
                    737: \  {
                    738: \  DEF_CA
                    739: \  Cell n1;
                    740: \  Cell n2;
                    741: \  Cell n;
                    742: \  NEXT_P0;
                    743: \  n1 = (Cell) _x_sp0;
                    744: \  n2 = (Cell) _x_sp1;
                    745: \  #ifdef VM_DEBUG
                    746: \  if (vm_debug) {
                    747: \  fputs(" n1=", vm_out); printarg_n (n1);
                    748: \  fputs(" n2=", vm_out); printarg_n (n2);
                    749: \  fputc('\n', vm_out);
                    750: \  }
                    751: \  #endif
                    752: \  {
                    753: \  #line 516 "./prim"
                    754: \  n = n1+n2;
                    755: \  }
                    756: \  NEXT_P1;
                    757: \  _x_sp0 = (Cell)n;
                    758: \  NEXT_P2;
                    759: \  }
                    760: \  NEXT_P1;
                    761: \  spTOS = (Cell)_x_sp0;
                    762: \  NEXT_P2;
                    763: 
1.71      anton     764: 1000 constant max-combined
                    765: create combined-prims max-combined cells allot
                    766: variable num-combined
                    767: 
                    768: create current-depth max-stacks cells allot
                    769: create max-depth     max-stacks cells allot
1.72    ! anton     770: create min-depth     max-stacks cells allot
1.71      anton     771: 
                    772: : init-combined ( -- )
                    773:     0 num-combined !
                    774:     current-depth max-stacks cells erase
1.72    ! anton     775:     max-depth     max-stacks cells erase
        !           776:     min-depth     max-stacks cells erase
        !           777:     prim prim-effect-in  prim prim-effect-in-end  !
        !           778:     prim prim-effect-out prim prim-effect-out-end ! ;
1.71      anton     779: 
                    780: : max! ( n addr -- )
                    781:     tuck @ max swap ! ;
                    782: 
1.72    ! anton     783: : min! ( n addr -- )
        !           784:     tuck @ min swap ! ;
        !           785: 
1.71      anton     786: : add-depths { p -- }
                    787:     \ combine stack effect of p with *-depths
                    788:     max-stacks 0 ?do
1.72    ! anton     789:        current-depth i th @
        !           790:        p prim-stacks-in  i th @ +
        !           791:        dup max-depth i th max!
        !           792:        p prim-stacks-out i th @ -
        !           793:        dup min-depth i th min!
        !           794:        current-depth i th !
1.71      anton     795:     loop ;
                    796: 
                    797: : add-prim ( addr u -- )
                    798:     \ add primitive given by "addr u" to combined-prims
                    799:     primitives search-wordlist s" unknown primitive" ?print-error
                    800:     execute { p }
1.72    ! anton     801:     p combined-prims num-combined @ th !
1.71      anton     802:     1 num-combined +!
                    803:     p add-depths ;
                    804: 
                    805: : compute-effects { q -- }
                    806:     \ compute the stack effects of q from the depths
                    807:     max-stacks 0 ?do
1.72    ! anton     808:        max-depth i th @ dup
        !           809:        q prim-stacks-in i th !
        !           810:        current-depth i th @ -
        !           811:        q prim-stacks-out i th !
        !           812:     loop ;
        !           813: 
        !           814: : make-effect-items { stack# items effect-endp -- }
        !           815:     \ effect-endp points to a pointer to the end of the current item-array
        !           816:     \ and has to be updated
        !           817:     stacks stack# th @ { stack }
        !           818:     items 0 +do
        !           819:        effect-endp @ { item }
        !           820:        i 0 <# #s stack stack-pointer 2@ holds [char] _ hold #> save-mem
        !           821:        item item-name 2!
        !           822:        stack item item-stack !
        !           823:        0 item item-type !
        !           824:        i item item-offset !
        !           825:        item item-first on
        !           826:        item% %size effect-endp +!
        !           827:     loop ;
        !           828: 
        !           829: : init-effects { q -- }
        !           830:     \ initialize effects field for FETCHES and STORES
        !           831:     max-stacks 0 ?do
        !           832:        i q prim-stacks-in  i th @ q prim-effect-in-end  make-effect-items
        !           833:        i q prim-stacks-out i th @ q prim-effect-out-end make-effect-items
1.71      anton     834:     loop ;
                    835: 
                    836: : process-combined ( -- )
1.72    ! anton     837:     prim compute-effects
        !           838:     prim init-effects
        !           839:     output-combined perform ;
        !           840: 
        !           841: \ C output
        !           842: 
        !           843: : print-item { n stack -- }
        !           844:     \ print nth stack item name
        !           845:     ." _" stack stack-typename 2@ type space
        !           846:     stack stack-pointer 2@ type n 0 .r ;
        !           847: 
        !           848: : print-declarations-combined ( -- )
        !           849:     max-stacks 0 ?do
        !           850:        max-depth i th @ min-depth i th @ - 0 +do
        !           851:            i stacks j th @ print-item ." ;" cr
        !           852:        loop
        !           853:     loop ;
        !           854:     
        !           855: : output-c-combined ( -- )
        !           856:     print-entry cr
        !           857:     \ debugging messages just in constituents
        !           858:     ." {" cr
        !           859:     ." DEF_CA" cr
        !           860:     print-declarations-combined
        !           861:     ." NEXT_P0;" cr
        !           862:     flush-tos
        !           863:     fetches
        !           864:     ;
        !           865: 
        !           866: : output-forth-combined ( -- )
        !           867:     ;
1.69      anton     868: 
1.67      anton     869: \ the parser
                    870: 
                    871: eof-char max-member \ the whole character set + EOF
                    872: 
                    873: : getinput ( -- n )
                    874:  rawinput @ endrawinput @ =
                    875:  if
                    876:    eof-char
                    877:  else
                    878:    cookedinput @ c@
                    879:  endif ;
                    880: 
                    881: :noname ( n -- )
                    882:  dup bl > if
                    883:   emit space
                    884:  else
                    885:   .
                    886:  endif ;
                    887: print-token !
                    888: 
                    889: : testchar? ( set -- f )
                    890:  getinput member? ;
                    891: ' testchar? test-vector !
                    892: 
                    893: : checksyncline ( -- )
                    894:     \ when input points to a newline, check if the next line is a
                    895:     \ sync line.  If it is, perform the appropriate actions.
                    896:     rawinput @ >r
                    897:     s" #line " r@ over compare 0<> if
                    898:        rdrop 1 line +! EXIT
                    899:     endif
                    900:     0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
                    901:     dup c@ bl = if
                    902:        char+ dup c@ [char] " <> abort" sync line syntax"
                    903:        char+ dup 100 [char] " scan drop swap 2dup - save-mem filename 2!
                    904:        char+
                    905:     endif
                    906:     dup c@ nl-char <> abort" sync line syntax"
                    907:     skipsynclines @ if
                    908:        dup char+ rawinput !
                    909:        rawinput @ c@ cookedinput @ c!
                    910:     endif
                    911:     drop ;
                    912: 
                    913: : ?nextchar ( f -- )
1.71      anton     914:     s" syntax error, wrong char" ?print-error
1.67      anton     915:     rawinput @ endrawinput @ <> if
                    916:        rawinput @ c@
                    917:        1 chars rawinput +!
                    918:        1 chars cookedinput +!
                    919:        nl-char = if
                    920:            checksyncline
                    921:            rawinput @ line-start !
                    922:        endif
                    923:        rawinput @ c@ cookedinput @ c!
                    924:     endif ;
                    925: 
                    926: : charclass ( set "name" -- )
                    927:  ['] ?nextchar terminal ;
                    928: 
                    929: : .. ( c1 c2 -- set )
                    930:  ( creates a set that includes the characters c, c1<=c<=c2 )
                    931:  empty copy-set
                    932:  swap 1+ rot do
                    933:   i over add-member
                    934:  loop ;
                    935: 
                    936: : ` ( -- terminal ) ( use: ` c )
                    937:  ( creates anonymous terminal for the character c )
                    938:  char singleton ['] ?nextchar make-terminal ;
                    939: 
                    940: char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
                    941: char 0 char 9 ..                                       charclass digit
                    942: bl singleton tab-char over add-member                  charclass white
                    943: nl-char singleton eof-char over add-member complement  charclass nonl
                    944: nl-char singleton eof-char over add-member
                    945:     char : over add-member complement                   charclass nocolonnl
                    946: bl 1+ maxchar .. char \ singleton complement intersection
                    947:                                                         charclass nowhitebq
                    948: bl 1+ maxchar ..                                        charclass nowhite
                    949: char " singleton eof-char over add-member complement   charclass noquote
                    950: nl-char singleton                                      charclass nl
                    951: eof-char singleton                                     charclass eof
                    952: 
                    953: 
                    954: (( letter (( letter || digit )) **
                    955: )) <- c-ident ( -- )
                    956: 
                    957: (( ` # ?? (( letter || digit || ` : )) **
                    958: )) <- stack-ident ( -- )
                    959: 
                    960: (( nowhitebq nowhite ** ))
                    961: <- forth-ident ( -- )
                    962: 
                    963: Variable forth-flag
                    964: Variable c-flag
                    965: 
                    966: (( (( ` e || ` E )) {{ start }} nonl ** 
                    967:    {{ end evaluate }}
                    968: )) <- eval-comment ( ... -- ... )
                    969: 
                    970: (( (( ` f || ` F )) {{ start }} nonl ** 
                    971:    {{ end forth-flag @ IF type cr ELSE 2drop THEN }}
                    972: )) <- forth-comment ( -- )
                    973: 
                    974: (( (( ` c || ` C )) {{ start }} nonl ** 
                    975:    {{ end c-flag @ IF type cr ELSE 2drop THEN }}
                    976: )) <- c-comment ( -- )
                    977: 
                    978: (( ` - nonl ** {{ 
                    979:        forth-flag @ IF ." [ELSE]" cr THEN
                    980:        c-flag @ IF ." #else" cr THEN }}
                    981: )) <- else-comment
                    982: 
                    983: (( ` + {{ start }} nonl ** {{ end
                    984:        dup
                    985:        IF      c-flag @
                    986:                IF    ." #ifdef HAS_" bounds ?DO  I c@ toupper emit  LOOP cr
                    987:                THEN
                    988:                forth-flag @
                    989:                IF  ." has? " type ."  [IF]"  cr THEN
                    990:        ELSE    2drop
                    991:            c-flag @      IF  ." #endif"  cr THEN
                    992:            forth-flag @  IF  ." [THEN]"  cr THEN
                    993:        THEN }}
                    994: )) <- if-comment
                    995: 
                    996: (( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
                    997: 
                    998: (( ` \ comment-body nl )) <- comment ( -- )
                    999: 
                   1000: (( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
                   1001: <- stack-items
                   1002: 
1.69      anton    1003: (( {{ prim prim-effect-in }}  stack-items {{ prim prim-effect-in-end ! }}
1.67      anton    1004:    ` - ` - white **
1.69      anton    1005:    {{ prim prim-effect-out }} stack-items {{ prim prim-effect-out-end ! }}
1.67      anton    1006: )) <- stack-effect ( -- )
                   1007: 
1.71      anton    1008: (( {{ prim create-prim }}
1.69      anton    1009:    ` ( white ** {{ start }} stack-effect {{ end prim prim-stack-string 2! }} ` ) white **
                   1010:    (( {{ start }} forth-ident {{ end prim prim-wordset 2! }} white **
                   1011:       (( {{ start }}  c-ident {{ end prim prim-c-name 2! }} )) ??
                   1012:    )) ??  nl
                   1013:    (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- prim prim-doc 2! }} ` " white ** nl )) ??
                   1014:    {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl white ** )) ** {{ end prim prim-c-code 2! skipsynclines on }}
1.67      anton    1015:    (( ` :  white ** nl
1.69      anton    1016:       {{ start }} (( nonl ++  nl white ** )) ++ {{ end prim prim-forth-code 2! }}
1.68      anton    1017:    )) ?? {{  declarations compute-offsets printprim 1 function-number +! }}
1.67      anton    1018:    (( nl || eof ))
1.69      anton    1019: )) <- simple-primitive ( -- )
                   1020: 
1.71      anton    1021: (( {{ init-combined }}
                   1022:    ` = (( white ++ {{ start }} forth-ident {{ end add-prim }} )) ++
                   1023:    (( nl || eof )) {{ process-combined }}
1.69      anton    1024: )) <- combined-primitive
                   1025: 
1.70      anton    1026: (( {{ make-prim to prim
1.69      anton    1027:       line @ name-line ! filename 2@ name-filename 2!
                   1028:       start }} forth-ident {{ end 2dup prim prim-name 2! prim prim-c-name 2! }}  white ++
                   1029:    (( simple-primitive || combined-primitive ))
1.67      anton    1030: )) <- primitive ( -- )
                   1031: 
                   1032: (( (( comment || primitive || nl white ** )) ** eof ))
                   1033: parser primitives2something
                   1034: warnings @ [IF]
                   1035: .( parser generated ok ) cr
                   1036: [THEN]
                   1037: 
1.69      anton    1038: : primfilter ( addr u -- )
                   1039:     \ process the string at addr u
                   1040:     over dup rawinput ! dup line-start ! cookedinput !
                   1041:     + endrawinput !
                   1042:     checksyncline
                   1043:     primitives2something ;    
1.8       pazsan   1044: 
1.72    ! anton    1045: : process-file ( addr u xt-simple x-combined -- )
        !          1046:     output-combined ! output !
1.61      anton    1047:     save-mem 2dup filename 2!
1.69      anton    1048:     slurp-file
1.17      anton    1049:     warnings @ if
                   1050:        ." ------------ CUT HERE -------------" cr  endif
1.69      anton    1051:     primfilter ;
1.30      pazsan   1052: 
1.72    ! anton    1053: \  : process      ( xt -- )
        !          1054: \      bl word count rot
        !          1055: \      process-file ;

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>