--- gforth/prims2x.fs	1994/09/12 19:00:36	1.8
+++ gforth/prims2x.fs	2001/01/18 19:43:02	1.68
@@ -1,3 +1,24 @@
+\ converts primitives to, e.g., C code 
+
+\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
+
+\ This file is part of Gforth.
+
+\ Gforth is free software; you can redistribute it and/or
+\ modify it under the terms of the GNU General Public License
+\ as published by the Free Software Foundation; either version 2
+\ of the License, or (at your option) any later version.
+
+\ This program is distributed in the hope that it will be useful,
+\ but WITHOUT ANY WARRANTY; without even the implied warranty of
+\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+\ GNU General Public License for more details.
+
+\ You should have received a copy of the GNU General Public License
+\ along with this program; if not, write to the Free Software
+\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+
+
 \ This is not very nice (hard limits, no checking, assumes 1 chars = 1)
 
 \ Optimizations:
@@ -21,59 +42,113 @@
 
 warnings off
 
-[IFUNDEF] vocabulary  include search-order.fs [THEN]
-include gray.fs
+[IFUNDEF] vocabulary	\ we are executed just with kernel image
+			\ load the rest that is needed
+			\ (require fails because this file is needed from a
+			\ different directory with the wordlibraries)
+include ./search.fs			
+include ./extend.fs
+[THEN]
+
+[IFUNDEF] environment?
+include ./environ.fs
+[THEN]
+
+: struct% struct ; \ struct is redefined in gray
+
+include ./gray.fs
 
 100 constant max-effect \ number of things on one side of a stack effect
-4096 constant batch-size \ no meaning, just make sure it's >0
 255 constant maxchar
 maxchar 1+ constant eof-char
-9 constant tab-char
-10 constant nl-char
-
-: read-whole-file ( c-addr1 file-id -- c-addr2 )
-\ reads the contents of the file file-id puts it into memory at c-addr1
-\ c-addr2 is the first address after the file block
-  begin ( c-addr file-id )
-    2dup batch-size swap read-file 
-    if
-      true abort" I/O error"
-    endif
-    ( c-addr file-id actual-size ) rot over + -rot
-    batch-size <>
-  until
-  drop ;
+#tab constant tab-char
+#lf constant nl-char
 
-variable input \ pointer to next character to be parsed
-variable endinput \ pointer to the end of the input (the char after the last)
+variable rawinput \ pointer to next character to be scanned
+variable endrawinput \ pointer to the end of the input (the char after the last)
+variable cookedinput \ pointer to the next char to be parsed
+variable line \ line number of char pointed to by input
+variable line-start \ pointer to start of current line (for error messages)
+0 line !
+2variable filename \ filename of original input file
+0 0 filename 2!
+2variable f-comment
+0 0 f-comment 2!
+variable skipsynclines \ are sync lines ("#line ...") invisible to the parser?
+skipsynclines on 
 
 : start ( -- addr )
- input @ ;
+ cookedinput @ ;
 
 : end ( addr -- addr u )
- input @ over - ;
+ cookedinput @ over - ;
+
+: quote ( -- )
+    [char] " emit ;
 
 variable output \ xt ( -- ) of output word
 
 : printprim ( -- )
  output @ execute ;
 
-: field
- <builds-field ( n1 n2 -- n3 )
- does>         ( addr1 -- addr2 )
-   @ + ;
-
-: const-field
- <builds-field ( n1 n2 -- n3 )
- does>         ( addr -- w )
-   @ + @ ;
-
-struct
- 2 cells field item-name
- cell field item-d-offset
- cell field item-f-offset
- cell field item-type
-constant item-descr
+struct%
+    cell% 2* field stack-pointer \ stackpointer name
+    cell% 2* field stack-cast \ cast string for assignments to stack elements
+    cell%    field stack-in-index-xt \ ( in-size item -- in-index )
+    cell%    field stack-in  \ number of stack items in effect in
+    cell%    field stack-out \ number of stack items in effect out
+end-struct stack%
+
+struct%
+ cell% 2* field item-name   \ name, excluding stack prefixes
+ cell%    field item-stack  \ descriptor for the stack used, 0 is default
+ cell%    field item-type   \ descriptor for the item type
+ cell%    field item-offset \ offset in stack items, 0 for the deepest element
+ cell%	  field item-first  \ true if this is the first occurence of the item
+end-struct item%
+
+struct%
+    cell% 2* field type-c-name
+    cell%    field type-stack \ default stack
+    cell%    field type-size  \ size of type in stack items
+    cell%    field type-fetch \ xt of fetch code generator ( item -- )
+    cell%    field type-store \ xt of store code generator ( item -- )
+end-struct type%
+
+: stack-in-index ( in-size item -- in-index )
+    item-offset @ - 1- ;
+
+: inst-in-index ( in-size item -- in-index )
+    nip dup item-offset @ swap item-type @ type-size @ + 1- ;
+
+: make-stack ( addr-ptr u1 addr-cast u2 "stack-name" -- )
+    create stack% %allot >r
+    save-mem r@ stack-cast 2!
+    save-mem r@ stack-pointer 2! 
+    ['] stack-in-index r> stack-in-index-xt ! ;
+
+s" sp" save-mem s" (Cell)" make-stack data-stack 
+s" fp" save-mem s" "       make-stack fp-stack
+s" rp" save-mem s" (Cell)" make-stack return-stack
+s" IP" save-mem s" error don't use # on results" make-stack inst-stream
+' inst-in-index inst-stream stack-in-index-xt !
+\ !! initialize stack-in and stack-out
+
+\ stack items
+
+: init-item ( addr u addr1 -- )
+    \ initialize item at addr1 with name addr u
+    \ !! remove stack prefix
+    dup item% %size erase
+    item-name 2! ;
+
+: map-items { addr end xt -- }
+    \ perform xt for all items in array addr...end
+    end addr ?do
+	i xt execute
+    item% %size +loop ;
+
+\ various variables for storing stuff of one primitive
 
 2variable forth-name
 2variable wordset
@@ -82,14 +157,17 @@ constant item-descr
 2variable c-code
 2variable forth-code
 2variable stack-string
-create effect-in  max-effect item-descr * allot
-create effect-out max-effect item-descr * allot
+create effect-in  max-effect item% %size * allot
+create effect-out max-effect item% %size * allot
 variable effect-in-end ( pointer )
 variable effect-out-end ( pointer )
-2variable effect-in-size
-2variable effect-out-size
+variable c-line
+2variable c-filename
+variable name-line
+2variable name-filename
+2variable last-name-filename
 
-variable primitive-number -9 primitive-number !
+Variable function-number 0 function-number !
 
 \ for several reasons stack items of a word are stored in a wordlist
 \ since neither forget nor marker are implemented yet, we make a new
@@ -104,168 +182,45 @@ variable items
 : complement ( set1 -- set2 )
  empty ['] bit-equivalent binary-set-operation ;
 
-\ the parser
-
-eof-char max-member \ the whole character set + EOF
-
-: getinput ( -- n )
- input @
- dup endinput @ =
- if
-   drop eof-char
- else
-   c@
- endif ;
-
-:noname ( n -- )
- dup bl > if
-  emit space
- else
-  .
- endif ;
-print-token !
-
-: testchar? ( set -- f )
- getinput member? ;
-' testchar? test-vector !
-
-: ?nextchar ( f -- )
- ?not? if
-   ." syntax error" cr
-   getinput . cr
-   input @ endinput @ over - 100 min type cr
-   abort
- endif
- input @ endinput @ <> if
-   1 input +!
- endif ;
-
-: charclass ( set "name" -- )
- ['] ?nextchar terminal ;
-
-: .. ( c1 c2 -- set )
- ( creates a set that includes the characters c, c1<=c<=c2 )
- empty copy-set
- swap 1+ rot do
-  i over add-member
- loop ;
-
-: ` ( -- terminal ) ( use: ` c )
- ( creates anonymous terminal for the character c )
- [compile] ascii singleton ['] ?nextchar make-terminal ;
-
-char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
-char 0 char 9 ..					charclass digit
-bl singleton						charclass blank
-tab-char singleton					charclass tab
-nl-char singleton eof-char over add-member complement	charclass nonl
-nl-char singleton eof-char over add-member char : over add-member complement  charclass nocolonnl
-bl 1+ maxchar ..					charclass nowhite
-char " singleton eof-char over add-member complement	charclass noquote
-nl-char singleton					charclass nl
-eof-char singleton					charclass eof
-
-
-(( letter (( letter || digit )) **
-)) <- c-name ( -- )
-
-nowhite ++
-<- name ( -- )
-
-(( ` \ nonl ** nl
-)) <- comment ( -- )
-
-(( {{ effect-in }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-in-end ! }}
-   ` - ` - blank **
-   {{ effect-out }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-out-end ! }}
-)) <- stack-effect ( -- )
-
-(( {{ s" " doc 2! s" " forth-code 2! }}
-   (( comment || nl )) **
-   (( {{ start }} name {{ end 2dup forth-name 2! c-name 2! }}  tab ++
-      {{ start }} stack-effect {{ end stack-string 2! }} tab ++
-        {{ start }} name {{ end wordset 2! }} tab **
-        (( {{ start }}  c-name {{ end c-name 2! }} )) ??  nl
-   ))
-   (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " nl )) ??
-   {{ start }} (( nocolonnl nonl **  nl )) ** {{ end c-code 2! }}
-   (( ` :  nl
-      {{ start }} (( nonl ++  nl )) ++ {{ end forth-code 2! }}
-   )) ??
-   (( nl || eof ))
-)) <- primitive ( -- )
-
-(( (( primitive {{ printprim }} )) **  eof ))
-parser primitives2something
-warnings @ [IF]
-.( parser generated ok ) cr
-[THEN]
-
-: primfilter ( file-id xt -- )
-\ fileid is for the input file, xt ( -- ) is for the output word
- output !
- here input !
- here swap read-whole-file
- dup endinput !
- here - allot
- align
- primitives2something ;
-
 \ types
 
-struct
- 2 cells field type-c-name
- cell const-field type-d-size
- cell const-field type-f-size
- cell const-field type-fetch-handler
- cell const-field type-store-handler
-constant type-description
-
-: data-stack-access ( n1 n2 n3 -- )
-\ n1 is the offset of the accessed item, n2, n3 are effect-*-size
- drop swap - 1- dup
- if
-   ." sp[" 0 .r ." ]"
- else
-   drop ." TOS"
- endif ;
-
-: fp-stack-access ( n1 n2 n3 -- )
-\ n1 is the offset of the accessed item, n2, n3 are effect-*-size
- nip swap - 1- dup
- if
-   ." fp[" 0 .r ." ]"
- else
-   drop ." FTOS"
- endif ;
+: stack-access ( n stack -- )
+    \ print a stack access at index n of stack
+    stack-pointer 2@ type
+    dup
+    if
+	." [" 0 .r ." ]"
+    else
+	drop ." TOS"
+    endif ;
+
+: item-in-index { item -- n }
+    \ n is the index of item (in the in-effect)
+    item item-stack @ dup >r stack-in @ ( in-size r:stack )
+    item r> stack-in-index-xt @ execute ;
 
 : fetch-single ( item -- )
+ \ fetch a single stack item from its stack
  >r
  r@ item-name 2@ type
  ."  = (" 
  r@ item-type @ type-c-name 2@ type ." ) "
- r@ item-d-offset @ effect-in-size 2@ data-stack-access ." ;" cr
+ r@ item-in-index r@ item-stack @ stack-access
+ ." ;" cr
  rdrop ; 
 
 : fetch-double ( item -- )
+ \ fetch a double stack item from its stack
  >r
- r@ item-name 2@ type 
- ." = ({Double_Store _d; _d.cells.low = "
- r@ item-d-offset @ dup    effect-in-size 2@ data-stack-access
- ." ; _d.cells.high = " 1+ effect-in-size 2@ data-stack-access
- ." ; _d.dcell;});" cr
- rdrop ;
-
-: fetch-float ( item -- )
- >r
- r@ item-name 2@ type
- ."  = "
- \ ." (" r@ item-type @ type-c-name 2@ type ." ) "
- r@ item-f-offset @ effect-in-size 2@ fp-stack-access ." ;" cr
+ ." FETCH_DCELL("
+ r@ item-name 2@ type ." , "
+ r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
+ ." , "                      -1 under+ ." (Cell)" stack-access
+ ." );" cr
  rdrop ;
 
-: d-same-as-in? ( item -- f )
-\ f is true iff the offset of item is the same as on input
+: same-as-in? ( item -- f )
+ \ f is true iff the offset and stack of item is the same as on input
  >r
  r@ item-name 2@ items @ search-wordlist 0=
  abort" bug"
@@ -274,27 +229,30 @@ constant type-description
  if \ item first appeared in output
    drop false
  else
-   item-d-offset @ r@ item-d-offset @ =
+   dup  item-stack  @ r@ item-stack  @ = 
+   swap item-offset @ r@ item-offset @ = and
  endif
  rdrop ;
 
-: is-in-tos? ( item -- f )
-\ true if item has the same offset as the input TOS
- item-d-offset @ 1+ effect-in-size 2@ drop = ;
+: item-out-index ( item -- n )
+    \ n is the index of item (in the in-effect)
+    >r r@ item-stack @ stack-out @ r> item-offset @ - 1- ;
 
 : really-store-single ( item -- )
  >r
- r@ item-d-offset @ effect-out-size 2@ data-stack-access ."  = (Cell)"
+ r@ item-out-index r@ item-stack @ stack-access ."  = "
+ r@ item-stack @ stack-cast 2@ type
  r@ item-name 2@ type ." ;"
  rdrop ;
 
 : store-single ( item -- )
  >r
- r@ d-same-as-in?
+ r@ same-as-in?
  if
-   r@ is-in-tos?
+   r@ item-in-index 0= r@ item-out-index 0= xor
    if
-     ." IF_TOS(" r@ really-store-single ." );" cr
+       ." IF_" r@ item-stack @ stack-pointer 2@ type
+       ." TOS(" r@ really-store-single ." );" cr
    endif
  else
    r@ really-store-single cr
@@ -304,256 +262,571 @@ constant type-description
 : store-double ( item -- )
 \ !! store optimization is not performed, because it is not yet needed
  >r
- ." {Double_Store _d; _d.dcell = " r@ item-name 2@ type ." ; "
- r@ item-d-offset @ dup    effect-out-size 2@ data-stack-access 
- ."  = _d.cells.low; " 1+ effect-out-size 2@ data-stack-access
- ." = _d.cells.high;}" cr
- rdrop ;
-
-: f-same-as-in? ( item -- f )
-\ f is true iff the offset of item is the same as on input
- >r
- r@ item-name 2@ items @ search-wordlist 0=
- abort" bug"
- execute @
- dup r@ =
- if \ item first appeared in output
-   drop false
- else
-   item-f-offset @ r@ item-f-offset @ =
- endif
- rdrop ;
-
-: is-in-ftos? ( item -- f )
-\ true if item has the same offset as the input TOS
- item-f-offset @ 1+ effect-in-size 2@ nip = ;
-
-: really-store-float ( item -- )
- >r
- r@ item-f-offset @ effect-out-size 2@ fp-stack-access ."  = "
- r@ item-name 2@ type ." ;"
- rdrop ;
-
-: store-float ( item -- )
- >r
- r@ f-same-as-in?
- if
-   r@ is-in-ftos?
-   if
-     ." IF_FTOS(" r@ really-store-float ." );" cr
-   endif
- else
-   r@ really-store-float cr
- endif
+ ." STORE_DCELL(" r@ item-name 2@ type ." , "
+ r@ item-out-index r@ item-stack @ 2dup stack-access
+ ." , "                       -1 under+ stack-access
+ ." );" cr
  rdrop ;
- 
-: single-type ( -- xt n1 n2 )
- ['] fetch-single ['] store-single 1 0 ;
 
-: double-type ( -- xt n1 n2 )
- ['] fetch-double ['] store-double 2 0 ;
+: single ( -- xt1 xt2 n )
+    ['] fetch-single ['] store-single 1 ;
 
-: float-type ( -- xt n1 n2 )
- ['] fetch-float ['] store-float 0 1 ;
+: double ( -- xt1 xt2 n )
+    ['] fetch-double ['] store-double 2 ;
 
 : s, ( addr u -- )
 \ allocate a string
  here swap dup allot move ;
 
-: starts-with ( addr u xt1 xt2 n1 n2 "prefix" -- )
-\ describes a type
-\ addr u specifies the C type name
-\ n1 is the size of the type on the data stack
-\ n2 is the size of the type on the FP stack
-\ stack effect entries of the type start with prefix
- >r >r >r >r
- dup >r here >r s,
- create
- r> r> 2,
- r> r> r> , r> , swap , , ;
-
-wordlist constant types
-get-current
-types set-current
-
-s" Bool"	single-type starts-with f
-s" Char"	single-type starts-with c
-s" Cell"	single-type starts-with n
-s" Cell"	single-type starts-with w
-s" UCell"	single-type starts-with u
-s" DCell"	double-type starts-with d
-s" UDCell"	double-type starts-with ud
-s" Float"	float-type  starts-with r
-s" Cell *"	single-type starts-with a_
-s" Char *"	single-type starts-with c_
-s" Float *"	single-type starts-with f_
-s" DFloat *"	single-type starts-with df_
-s" SFloat *"	single-type starts-with sf_
-s" Xt"		single-type starts-with xt
-s" WID"		single-type starts-with wid
-s" F83Name *"	single-type starts-with f83name
-
-set-current
-
-: get-type ( addr1 u1 -- type-descr )
-\ get the type of the name in addr1 u1
-\ type-descr is a pointer to a type-descriptor
- 0 swap ?do
-   dup i types search-wordlist
-   if \ ok, we have the type ( addr1 xt )
-     execute nip
-     UNLOOP EXIT
-   endif
- -1 +loop
- \ we did not find a type, abort
- true abort" unknown type prefix" ;
+wordlist constant prefixes
 
 : declare ( addr "name" -- )
 \ remember that there is a stack item at addr called name
  create , ;
 
+: !default ( w addr -- )
+    dup @ if
+	2drop \ leave nonzero alone
+    else
+	!
+    endif ;
+
+: create-type { addr u xt1 xt2 n stack -- } ( "prefix" -- )
+    \ describes a type
+    \ addr u specifies the C type name
+    \ stack effect entries of the type start with prefix
+    create type% %allot >r
+    addr u save-mem r@ type-c-name 2!
+    xt1   r@ type-fetch !
+    xt2   r@ type-store !
+    n     r@ type-size !
+    stack r@ type-stack !
+    rdrop ;
+
+: type-prefix ( xt1 xt2 n stack "prefix" -- )
+    create-type
+does> ( item -- )
+    \ initialize item
+    { item typ }
+    typ item item-type !
+    typ type-stack @ item item-stack !default
+    item item-name 2@ items @ search-wordlist 0= if \ new name
+	item item-name 2@ nextname item declare
+	item item-first on
+	\ typ type-c-name 2@ type space type  ." ;" cr
+    else
+	drop
+	item item-first off
+    endif ;
+
+: execute-prefix ( item addr1 u1 -- )
+    \ execute the word ( item -- ) associated with the longest prefix
+    \ of addr1 u1
+    0 swap ?do
+	dup i prefixes search-wordlist
+	if \ ok, we have the type ( item addr1 xt )
+	    nip execute
+	    UNLOOP EXIT
+	endif
+	-1 s+loop
+    \ we did not find a type, abort
+    true abort" unknown prefix" ;
+
 : declaration ( item -- )
- dup item-name 2@ items @ search-wordlist
- if \ already declared ( item xt )
-   execute @ item-type @ swap item-type !
- else ( addr )
-   dup item-name 2@ nextname dup declare ( addr )
-   dup >r item-name 2@ 2dup get-type ( addr1 u type-descr )
-   dup r> item-type ! ( addr1 u type-descr )
-   type-c-name 2@ type space type ." ;" cr
- endif ;
+    dup item-name 2@ execute-prefix ;
 
 : declaration-list ( addr1 addr2 -- )
- swap ?do
-  i declaration
- item-descr +loop ;
-
-: fetch ( addr -- )
- dup item-type @ type-fetch-handler execute ;
+    ['] declaration map-items ;
 
 : declarations ( -- )
  wordlist dup items ! set-current
  effect-in effect-in-end @ declaration-list
  effect-out effect-out-end @ declaration-list ;
 
+: print-declaration { item -- }
+    item item-first @ if
+	item item-type @ type-c-name 2@ type space
+	item item-name 2@ type ." ;" cr
+    endif ;
+
+: print-declarations ( -- )
+    effect-in  effect-in-end  @ ['] print-declaration map-items
+    effect-out effect-out-end @ ['] print-declaration map-items ;
+    
+: stack-prefix ( stack "prefix" -- )
+    name tuck nextname create ( stack length ) 2,
+does> ( item -- )
+    2@ { item stack prefix-length }
+    item item-name 2@ prefix-length /string item item-name 2!
+    stack item item-stack !
+    item declaration ;
+
 \ offset computation
 \ the leftmost (i.e. deepest) item has offset 0
 \ the rightmost item has the highest offset
 
-: compute-offset ( n1 n2 item -- n3 n4 )
-\ n1, n3 are data-stack-offsets
-\ n2, n4 are the fp-stack-offsets
- >r
- swap dup r@ item-d-offset !
- r@ item-type @ type-d-size +
- swap dup r@ item-f-offset !
- r@ item-type @ type-f-size +
- rdrop ;
+: compute-offset { item xt -- }
+    \ xt specifies in/out; update stack-in/out and set item-offset
+    item item-type @ type-size @
+    item item-stack @ xt execute dup @ >r +!
+    r> item item-offset ! ;
+
+: compute-offset-in ( addr1 addr2 -- )
+    ['] stack-in compute-offset ;
+
+: compute-offset-out ( addr1 addr2 -- )
+    ['] stack-out compute-offset ;
 
-: compute-list ( addr1 addr2 -- n1 n2 )
-\ n1, n2 are the final offsets
- 0 0 2swap swap ?do
-  i compute-offset
- item-descr +loop ;
+: clear-stack { -- }
+    dup stack-in off stack-out off ;
 
 : compute-offsets ( -- )
- effect-in effect-in-end @ compute-list effect-in-size 2!
- effect-out effect-out-end @ compute-list effect-out-size 2! ;
+    data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
+    inst-stream clear-stack
+    effect-in  effect-in-end  @ ['] compute-offset-in  map-items
+    effect-out effect-out-end @ ['] compute-offset-out map-items
+    inst-stream stack-out @ 0<> abort" # can only be on the input side" ;
+
+: flush-a-tos { stack -- }
+    stack stack-out @ 0<> stack stack-in @ 0= and
+    if
+	." IF_" stack stack-pointer 2@ 2dup type ." TOS("
+	2dup type ." [0] = " type ." TOS);" cr
+    endif ;
 
 : flush-tos ( -- )
- effect-in-size 2@ effect-out-size 2@
- 0<> rot 0= and
- if
-   ." IF_FTOS(fp[0] = FTOS);" cr
- endif
- 0<> swap 0= and
- if
-   ." IF_TOS(sp[0] = TOS);" cr
- endif ;
+    data-stack   flush-a-tos
+    fp-stack     flush-a-tos
+    return-stack flush-a-tos ;
+
+: fill-a-tos { stack -- }
+    stack stack-out @ 0= stack stack-in @ 0<> and
+    if
+	." IF_" stack stack-pointer 2@ 2dup type ." TOS("
+	2dup type ." TOS = " type ." [0]);" cr
+    endif ;
 
 : fill-tos ( -- )
- effect-in-size 2@ effect-out-size 2@
- 0= rot 0<> and
- if
-   ." IF_FTOS(FTOS = fp[0]);" cr
- endif
- 0= swap 0<> and
- if
-   ." IF_TOS(TOS = sp[0]);" cr
- endif ;
+    \ !! inst-stream for prefetching?
+    fp-stack     fill-a-tos
+    data-stack   fill-a-tos
+    return-stack fill-a-tos ;
+
+: fetch ( addr -- )
+ dup item-type @ type-fetch @ execute ;
 
 : fetches ( -- )
- effect-in-end @ effect-in ?do
-   i fetch
- item-descr +loop ; 
+    effect-in effect-in-end @ ['] fetch map-items ;
+
+: stack-pointer-update { stack -- }
+    \ stack grow downwards
+    stack stack-in @ stack stack-out @ -
+    ?dup-if \ this check is not necessary, gcc would do this for us
+	stack stack-pointer 2@ type ."  += " 0 .r ." ;" cr
+    endif ;
+
+: inst-pointer-update ( -- )
+    inst-stream stack-in @ ?dup-if
+	." INC_IP(" 0 .r ." );" cr
+    endif ;
 
 : stack-pointer-updates ( -- )
-\ we need not check if an update is a noop; gcc does this for us
- effect-in-size 2@
- effect-out-size 2@
- rot swap - ( d-in d-out f-diff )
- rot rot - ( f-diff d-diff )
- ?dup IF  ." sp += " 0 .r ." ;" cr  THEN
- ?dup IF  ." fp += " 0 .r ." ;" cr  THEN ;
+    inst-pointer-update
+    data-stack   stack-pointer-update
+    fp-stack     stack-pointer-update
+    return-stack stack-pointer-update ;
 
 : store ( item -- )
 \ f is true if the item should be stored
 \ f is false if the store is probably not necessary
- dup item-type @ type-store-handler execute ;
+ dup item-type @ type-store @ execute ;
 
 : stores ( -- )
- effect-out-end @ effect-out ?do
-   i store
- item-descr +loop ; 
-
-: .stack-list ( start end -- )
- swap ?do
-   i item-name 2@ type space
- item-descr +loop ; 
+    effect-out effect-out-end @ ['] store map-items ;
 
-: output-c ( -- )
- ." I_" c-name 2@ type ." :	/* " forth-name 2@ type ."  ( " stack-string 2@ type ."  ) */" cr
+: output-c-tail ( -- )
+    \ the final part of the generated C code
+    ." NEXT_P1;" cr
+    stores
+    fill-tos
+    ." NEXT_P2;" cr ;
+
+: type-c ( c-addr u -- )
+    \ like TYPE, but replaces "TAIL;" with tail code
+    begin ( c-addr1 u1 )
+	2dup s" TAIL;" search
+    while ( c-addr1 u1 c-addr3 u3 )
+	2dup 2>r drop nip over - type
+	output-c-tail
+	2r> 5 /string
+	\ !! resync #line missing
+    repeat
+    2drop type ;
+
+: print-type-prefix ( type -- )
+    body> >head .name ;
+
+: print-debug-arg { item -- }
+    ." fputs(" quote space item item-name 2@ type ." =" quote ." , vm_out); "
+    ." printarg_" item item-type @ print-type-prefix
+    ." (" item item-name 2@ type ." );" cr ;
+    
+: print-debug-args ( -- )
+    ." #ifdef VM_DEBUG" cr
+    ." if (vm_debug) {" cr
+    effect-in effect-in-end @ ['] print-debug-arg map-items
+    ." fputc('\n', vm_out);" cr
+    ." }" cr
+    ." #endif" cr ;
+    
+: output-c ( -- ) 
+ ." I_" c-name 2@ type ." :	/* " forth-name 2@ type ."  ( " stack-string 2@ type ." ) */" cr
  ." /* " doc 2@ type ."  */" cr
+ ." NAME(" quote forth-name 2@ type quote ." )" cr \ debugging
  ." {" cr
  ." DEF_CA" cr
- declarations
- compute-offsets \ for everything else
+ print-declarations
+ ." NEXT_P0;" cr
  flush-tos
  fetches
- stack-pointer-updates cr
- ." NAME(" [char] " emit forth-name 2@ type [char] " emit ." )" cr \ debugging
+ print-debug-args
+ stack-pointer-updates
  ." {" cr
- c-code 2@ type
+ ." #line " c-line @ . quote c-filename 2@ type quote cr
+ c-code 2@ type-c
  ." }" cr
- ." NEXT_P1;" cr
- stores
- fill-tos
- ." NEXT1_P2;" cr
+ output-c-tail
  ." }" cr
  cr
 ;
 
-: output-label ( -- )
- ." &&I_" c-name 2@ type ." ," cr ;
+: disasm-arg { item -- }
+    item item-stack @ inst-stream = if
+	."   fputc(' ', vm_out); "
+	." printarg_" item item-type @ print-type-prefix
+	." ((" item item-type @ type-c-name 2@ type ." )"
+	." ip[" item item-offset @ 1+ 0 .r ." ]);" cr
+    endif ;
+
+: disasm-args ( -- )
+    effect-in effect-in-end @ ['] disasm-arg map-items ;
+
+: output-disasm ( -- )
+    \ generate code for disassembling VM instructions
+    ." if (ip[0] == prim[" function-number @ 0 .r ." ]) {" cr
+    ."   fputs(" quote forth-name 2@ type quote ." , vm_out);" cr
+    disasm-args
+    ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
+    ." } else " ;
+
+: gen-arg-parm { item -- }
+    item item-stack @ inst-stream = if
+	." , " item item-type @ type-c-name 2@ type space
+	item item-name 2@ type
+    endif ;
+
+: gen-args-parm ( -- )
+    effect-in effect-in-end @ ['] gen-arg-parm map-items ;
+
+: gen-arg-gen { item -- }
+    item item-stack @ inst-stream = if
+	."   genarg_" item item-type @ print-type-prefix
+        ." (ctp, " item item-name 2@ type ." );" cr
+    endif ;
+
+: gen-args-gen ( -- )
+    effect-in effect-in-end @ ['] gen-arg-gen map-items ;
+
+: output-gen ( -- )
+    \ generate C code for generating VM instructions
+    ." void gen_" c-name 2@ type ." (Inst **ctp" gen-args-parm ." )" cr
+    ." {" cr
+    ."   gen_inst(ctp, vm_prim[" function-number @ 0 .r ." ]);" cr
+    gen-args-gen
+    ." }" cr ;
+
+: stack-used? { stack -- f }
+    stack stack-in @ stack stack-out @ or 0<> ;
+
+: output-funclabel ( -- )
+  ." &I_" c-name 2@ type ." ," cr ;
+
+: output-forthname ( -- )
+  '" emit forth-name 2@ type '" emit ." ," cr ;
+
+: output-c-func ( -- )
+\ used for word libraries
+    ." Cell * I_" c-name 2@ type ." (Cell *SP, Cell **FP)      /* " forth-name 2@ type
+    ."  ( " stack-string 2@ type ."  ) */" cr
+    ." /* " doc 2@ type ."  */" cr
+    ." NAME(" quote forth-name 2@ type quote ." )" cr
+    \ debugging
+    ." {" cr
+    print-declarations
+    inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
+    data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
+    fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
+    return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN
+    flush-tos
+    fetches
+    stack-pointer-updates
+    fp-stack   stack-used? IF ." *FP=fp;" cr THEN
+    ." {" cr
+    ." #line " c-line @ . quote c-filename 2@ type quote cr
+    c-code 2@ type
+    ." }" cr
+    stores
+    fill-tos
+    ." return (sp);" cr
+    ." }" cr
+    cr ;
+
+: output-label ( -- )  
+    ." (Label)&&I_" c-name 2@ type ." ," cr ;
+
+: output-alias ( -- ) 
+    ( primitive-number @ . ." alias " ) ." Primitive " forth-name 2@ type cr ;
+
+: output-forth ( -- )  
+    forth-code @ 0=
+    IF    	\ output-alias
+	\ this is bad for ec: an alias is compiled if tho word does not exist!
+	\ JAW
+    ELSE  ." : " forth-name 2@ type ."   ( "
+	stack-string 2@ type ." )" cr
+	forth-code 2@ type cr
+    THEN ;
+
+: output-tag-file ( -- )
+    name-filename 2@ last-name-filename 2@ compare if
+	name-filename 2@ last-name-filename 2!
+	#ff emit cr
+	name-filename 2@ type
+	." ,0" cr
+    endif ;
+
+: output-tag ( -- )
+    output-tag-file
+    forth-name 2@ 1+ type
+    127 emit
+    space forth-name 2@ type space
+    1 emit
+    name-line @ 0 .r
+    ." ,0" cr ;
+
+[IFDEF] documentation
+: register-doc ( -- )
+    get-current documentation set-current
+    forth-name 2@ nextname create
+    forth-name 2@ 2,
+    stack-string 2@ condition-stack-effect 2,
+    wordset 2@ 2,
+    c-name 2@ condition-pronounciation 2,
+    doc 2@ 2,
+    set-current ;
+[THEN]
 
-: output-alias ( -- )
- primitive-number @ . ." alias " forth-name 2@ type cr
- -1 primitive-number +! ;
-
-: output-forth ( -- )
- forth-code @ 0=
- IF    output-alias
- ELSE  ." : " forth-name 2@ type ."   ( "
-       effect-in effect-in-end @ .stack-list ." -- "
-       effect-out effect-out-end @ .stack-list ." )" cr
-       forth-code 2@ type cr
-       -1 primitive-number +!
- THEN
-;
 
-: process-file ( addr u xt -- )
- >r r/o open-file abort" cannot open file"
- warnings @ if
- ." ------------ CUT HERE -------------" cr  endif
- r> primfilter ;
+\ the parser
+
+eof-char max-member \ the whole character set + EOF
+
+: getinput ( -- n )
+ rawinput @ endrawinput @ =
+ if
+   eof-char
+ else
+   cookedinput @ c@
+ endif ;
+
+:noname ( n -- )
+ dup bl > if
+  emit space
+ else
+  .
+ endif ;
+print-token !
 
+: testchar? ( set -- f )
+ getinput member? ;
+' testchar? test-vector !
+
+: checksyncline ( -- )
+    \ when input points to a newline, check if the next line is a
+    \ sync line.  If it is, perform the appropriate actions.
+    rawinput @ >r
+    s" #line " r@ over compare 0<> if
+	rdrop 1 line +! EXIT
+    endif
+    0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
+    dup c@ bl = if
+	char+ dup c@ [char] " <> abort" sync line syntax"
+	char+ dup 100 [char] " scan drop swap 2dup - save-mem filename 2!
+	char+
+    endif
+    dup c@ nl-char <> abort" sync line syntax"
+    skipsynclines @ if
+	dup char+ rawinput !
+	rawinput @ c@ cookedinput @ c!
+    endif
+    drop ;
+
+: print-error-line ( -- )
+    \ print the current line and position
+    line-start @ endrawinput @ over - 2dup nl-char scan drop nip ( start end )
+    over - type cr
+    line-start @ rawinput @ over - typewhite ." ^" cr ;
+    
+: ?nextchar ( f -- )
+    ?not? if
+	outfile-id >r try
+	    stderr to outfile-id
+	    filename 2@ type ." :" line @ 0 .r ." : syntax error, wrong char:"
+	    getinput . cr
+	    print-error-line
+	    0
+	recover endtry
+	r> to outfile-id throw
+	abort
+    endif
+    rawinput @ endrawinput @ <> if
+	rawinput @ c@
+	1 chars rawinput +!
+	1 chars cookedinput +!
+	nl-char = if
+	    checksyncline
+	    rawinput @ line-start !
+	endif
+	rawinput @ c@ cookedinput @ c!
+    endif ;
+
+: charclass ( set "name" -- )
+ ['] ?nextchar terminal ;
+
+: .. ( c1 c2 -- set )
+ ( creates a set that includes the characters c, c1<=c<=c2 )
+ empty copy-set
+ swap 1+ rot do
+  i over add-member
+ loop ;
+
+: ` ( -- terminal ) ( use: ` c )
+ ( creates anonymous terminal for the character c )
+ char singleton ['] ?nextchar make-terminal ;
+
+char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
+char 0 char 9 ..					charclass digit
+bl singleton tab-char over add-member			charclass white
+nl-char singleton eof-char over add-member complement	charclass nonl
+nl-char singleton eof-char over add-member
+    char : over add-member complement                   charclass nocolonnl
+bl 1+ maxchar .. char \ singleton complement intersection
+                                                        charclass nowhitebq
+bl 1+ maxchar ..                                        charclass nowhite
+char " singleton eof-char over add-member complement	charclass noquote
+nl-char singleton					charclass nl
+eof-char singleton					charclass eof
+
+
+(( letter (( letter || digit )) **
+)) <- c-ident ( -- )
+
+(( ` # ?? (( letter || digit || ` : )) **
+)) <- stack-ident ( -- )
+
+(( nowhitebq nowhite ** ))
+<- forth-ident ( -- )
+
+Variable forth-flag
+Variable c-flag
+
+(( (( ` e || ` E )) {{ start }} nonl ** 
+   {{ end evaluate }}
+)) <- eval-comment ( ... -- ... )
+
+(( (( ` f || ` F )) {{ start }} nonl ** 
+   {{ end forth-flag @ IF type cr ELSE 2drop THEN }}
+)) <- forth-comment ( -- )
+
+(( (( ` c || ` C )) {{ start }} nonl ** 
+   {{ end c-flag @ IF type cr ELSE 2drop THEN }}
+)) <- c-comment ( -- )
+
+(( ` - nonl ** {{ 
+	forth-flag @ IF ." [ELSE]" cr THEN
+	c-flag @ IF ." #else" cr THEN }}
+)) <- else-comment
+
+(( ` + {{ start }} nonl ** {{ end
+	dup
+	IF	c-flag @
+		IF    ." #ifdef HAS_" bounds ?DO  I c@ toupper emit  LOOP cr
+		THEN
+		forth-flag @
+		IF  ." has? " type ."  [IF]"  cr THEN
+	ELSE	2drop
+	    c-flag @      IF  ." #endif"  cr THEN
+	    forth-flag @  IF  ." [THEN]"  cr THEN
+	THEN }}
+)) <- if-comment
+
+(( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
+
+(( ` \ comment-body nl )) <- comment ( -- )
+
+(( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
+<- stack-items
+
+(( {{ effect-in }}  stack-items {{ effect-in-end ! }}
+   ` - ` - white **
+   {{ effect-out }} stack-items {{ effect-out-end ! }}
+)) <- stack-effect ( -- )
+
+(( {{ s" " doc 2! s" " forth-code 2! s" " wordset 2! }}
+   (( {{ line @ name-line ! filename 2@ name-filename 2! }}
+      {{ start }} forth-ident {{ end 2dup forth-name 2! c-name 2! }}  white ++
+      ` ( white ** {{ start }} stack-effect {{ end stack-string 2! }} ` ) white **
+        (( {{ start }} forth-ident {{ end wordset 2! }} white **
+	   (( {{ start }}  c-ident {{ end c-name 2! }} )) ??
+	)) ??  nl
+   ))
+   (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " white ** nl )) ??
+   {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl white ** )) ** {{ end c-code 2! skipsynclines on }}
+   (( ` :  white ** nl
+      {{ start }} (( nonl ++  nl white ** )) ++ {{ end forth-code 2! }}
+   )) ?? {{  declarations compute-offsets printprim 1 function-number +! }}
+   (( nl || eof ))
+)) <- primitive ( -- )
+
+(( (( comment || primitive || nl white ** )) ** eof ))
+parser primitives2something
+warnings @ [IF]
+.( parser generated ok ) cr
+[THEN]
+
+: primfilter ( file-id xt -- )
+\ fileid is for the input file, xt ( -- ) is for the output word
+ output !
+ here dup rawinput ! dup line-start ! cookedinput !
+ here unused rot read-file throw
+ dup here + endrawinput !
+ allot
+ align
+ checksyncline
+\ begin
+\     getinput dup eof-char = ?EXIT emit true ?nextchar
+\ again ;
+ primitives2something ;
+
+: process-file ( addr u xt -- )
+    >r
+    save-mem 2dup filename 2!
+    0 function-number !
+    r/o open-file abort" cannot open file"
+    warnings @ if
+	." ------------ CUT HERE -------------" cr  endif
+    r> primfilter ;
+
+: process      ( xt -- )
+    bl word count rot
+    process-file ;