--- gforth/prims2x.fs	2000/11/12 14:09:45	1.50
+++ gforth/prims2x.fs	2001/01/09 16:11:36	1.63
@@ -82,38 +82,58 @@ skipsynclines on
 : end ( addr -- addr u )
  cookedinput @ over - ;
 
+: quote ( -- )
+    [char] " emit ;
+
 variable output \ xt ( -- ) of output word
 
 : printprim ( -- )
  output @ execute ;
 
-\ stack types
-
 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
+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! ;
+    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
 
-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
-end-struct item%
-
 : init-item ( addr u addr1 -- )
     \ initialize item at addr1 with name addr u
     \ !! remove stack prefix
@@ -245,14 +265,21 @@ eof-char singleton					charclass eof
 
 
 (( letter (( letter || digit )) **
-)) <- c-name ( -- )
+)) <- c-ident ( -- )
+
+(( ` # ?? (( letter || digit || ` : )) **
+)) <- stack-ident ( -- )
 
 (( nowhitebq nowhite ** ))
-<- name ( -- )
+<- 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 ( -- )
@@ -279,31 +306,35 @@ Variable c-flag
 	THEN }}
 )) <- if-comment
 
-(( (( forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
+(( (( eval-comment || forth-comment || c-comment || else-comment || if-comment )) ?? nonl ** )) <- comment-body
 
 (( ` \ comment-body nl )) <- comment ( -- )
 
-(( {{ effect-in }} (( {{ start }} c-name {{ end 2 pick init-item item% %size + }} white ** )) ** {{ effect-in-end ! }}
+(( {{ start }} stack-ident {{ end 2 pick init-item item% %size + }} white ** )) **
+<- stack-items
+
+(( {{ effect-in }}  stack-items {{ effect-in-end ! }}
    ` - ` - white **
-   {{ effect-out }} (( {{ start }} c-name {{ end 2 pick init-item item% %size + }} white ** )) ** {{ effect-out-end ! }}
+   {{ effect-out }} stack-items {{ effect-out-end ! }}
 )) <- stack-effect ( -- )
 
-(( {{ s" " doc 2! s" " forth-code 2! }}
+(( {{ s" " doc 2! s" " forth-code 2! s" " wordset 2! }}
    (( {{ line @ name-line ! filename 2@ name-filename 2! }}
-      {{ start }} name {{ end 2dup forth-name 2! c-name 2! }}  white ++
+      {{ start }} forth-ident {{ end 2dup forth-name 2! c-name 2! }}  white ++
       ` ( white ** {{ start }} stack-effect {{ end stack-string 2! }} ` ) white **
-        {{ start }} name {{ end wordset 2! }} white **
-        (( {{ start }}  c-name {{ end c-name 2! }} )) ??  nl
+        (( {{ start }} forth-ident {{ end wordset 2! }} white **
+	   (( {{ start }}  c-ident {{ end c-name 2! }} )) ??
+	)) ??  nl
    ))
-   (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " nl )) ??
-   {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl )) ** {{ end c-code 2! skipsynclines on }}
-   (( ` :  nl
-      {{ start }} (( nonl ++  nl )) ++ {{ end forth-code 2! }}
+   (( ` " ` "  {{ 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! }}
    )) ?? {{ printprim }}
    (( nl || eof ))
 )) <- primitive ( -- )
 
-(( (( comment || primitive || nl )) ** eof ))
+(( (( comment || primitive || nl white ** )) ** eof ))
 parser primitives2something
 warnings @ [IF]
 .( parser generated ok ) cr
@@ -325,14 +356,6 @@ warnings @ [IF]
 
 \ types
 
-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-access ( n stack -- )
     \ print a stack access at index n of stack
     stack-pointer 2@ type
@@ -343,9 +366,10 @@ end-struct type%
 	drop ." TOS"
     endif ;
 
-: item-in-index ( item -- n )
+: item-in-index { item -- n }
     \ n is the index of item (in the in-effect)
-    >r r@ item-stack @ stack-in @ r> item-offset @ - 1- ;
+    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
@@ -362,8 +386,8 @@ end-struct type%
  >r
  ." FETCH_DCELL("
  r@ item-name 2@ type ." , "
- r@ item-in-index r@ item-stack @ 2dup stack-access
- ." , "                      -1 under+ stack-access
+ r@ item-in-index r@ item-stack @ 2dup ." (Cell)" stack-access
+ ." , "                      -1 under+ ." (Cell)" stack-access
  ." );" cr
  rdrop ;
 
@@ -416,15 +440,11 @@ end-struct type%
  ." );" cr
  rdrop ;
 
+: single ( -- xt1 xt2 n )
+    ['] fetch-single ['] store-single 1 ;
 
-: single-type ( -- xt1 xt2 n stack )
- ['] fetch-single ['] store-single 1 data-stack ;
-
-: double-type ( -- xt1 xt2 n stack )
- ['] fetch-double ['] store-double 2 data-stack ;
-
-: float-type ( -- xt1 xt2 n stack )
- ['] fetch-single ['] store-single 1 fp-stack ;
+: double ( -- xt1 xt2 n )
+    ['] fetch-double ['] store-double 2 ;
 
 : s, ( addr u -- )
 \ allocate a string
@@ -455,7 +475,7 @@ wordlist constant prefixes
     stack r@ type-stack !
     rdrop ;
 
-: type-prefix ( addr u xt1 xt2 n stack "prefix" -- )
+: type-prefix ( xt1 xt2 n stack "prefix" -- )
     create-type
 does> ( item -- )
     \ initialize item
@@ -485,6 +505,14 @@ does> ( item -- )
 : declaration ( item -- )
     dup item-name 2@ execute-prefix ;
 
+: 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 ;
+    
 : declaration-list ( addr1 addr2 -- )
  swap ?do
   i declaration
@@ -495,28 +523,6 @@ does> ( item -- )
  effect-in effect-in-end @ declaration-list
  effect-out effect-out-end @ declaration-list ;
 
-get-current
-prefixes set-current
-
-s" Bool"	single-type type-prefix f
-s" Char"	single-type type-prefix c
-s" Cell"	single-type type-prefix n
-s" Cell"	single-type type-prefix w
-s" UCell"	single-type type-prefix u
-s" DCell"	double-type type-prefix d
-s" UDCell"	double-type type-prefix ud
-s" Float"	float-type  type-prefix r
-s" Cell *"	single-type type-prefix a_
-s" Char *"	single-type type-prefix c_
-s" Float *"	single-type type-prefix f_
-s" DFloat *"	single-type type-prefix df_
-s" SFloat *"	single-type type-prefix sf_
-s" Xt"		single-type type-prefix xt
-s" WID"		single-type type-prefix wid
-s" struct F83Name *"	single-type type-prefix f83name
-
-set-current
-
 \ offset computation
 \ the leftmost (i.e. deepest) item has offset 0
 \ the rightmost item has the highest offset
@@ -536,11 +542,12 @@ set-current
 : clear-stack { -- }
     dup stack-in off stack-out off ;
 
-
 : compute-offsets ( -- )
-    data-stack clear-stack  fp-stack clear-stack
+    data-stack clear-stack  fp-stack clear-stack return-stack clear-stack
+    inst-stream clear-stack
     effect-in  effect-in-end  @ ['] stack-in  compute-list
-    effect-out effect-out-end @ ['] stack-out compute-list ;
+    effect-out effect-out-end @ ['] stack-out compute-list
+    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
@@ -550,8 +557,9 @@ set-current
     endif ;
 
 : flush-tos ( -- )
-    data-stack flush-a-tos
-    fp-stack   flush-a-tos ;
+    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
@@ -561,8 +569,10 @@ set-current
     endif ;
 
 : fill-tos ( -- )
-    fp-stack   fill-a-tos
-    data-stack fill-a-tos ;
+    \ !! 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 ;
@@ -579,9 +589,16 @@ set-current
 	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 ( -- )
-    data-stack stack-pointer-update
-    fp-stack   stack-pointer-update ;
+    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
@@ -593,10 +610,47 @@ set-current
    i store
  item% %size +loop ; 
 
+: 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-end @ effect-in ?do
+	i print-debug-arg
+	item% %size +loop
+    ." 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(" [char] " emit forth-name 2@ type [char] " emit ." )" cr \ debugging
+ ." NAME(" quote forth-name 2@ type quote ." )" cr \ debugging
  ." {" cr
  ." DEF_CA" cr
  declarations
@@ -604,19 +658,74 @@ set-current
  ." NEXT_P0;" cr
  flush-tos
  fetches
+ print-debug-args
  stack-pointer-updates
  ." {" cr
- ." #line " c-line @ . [char] " emit c-filename 2@ type [char] " emit 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
- ." NEXT_P2;" cr
+ output-c-tail
  ." }" cr
  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-end @ effect-in ?do
+   i disasm-arg
+ item% %size +loop ; 
+
+: 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
+    ." /* " declarations ." */" cr
+    compute-offsets
+    disasm-args
+    ."   ip += " inst-stream stack-in @ 1+ 0 .r ." ;" cr
+    ." } else "
+    1 function-number +! ;
+
+: 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-end @ effect-in ?do
+   i gen-arg-parm
+ item% %size +loop ; 
+
+: 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-end @ effect-in ?do
+   i gen-arg-gen
+ item% %size +loop ; 
+
+: output-gen ( -- )
+    \ generate C code for generating VM instructions
+    ." /* " declarations ." */" cr
+    compute-offsets
+    ." 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
+    1 function-number +! ;
+
 : stack-used? { stack -- f }
     stack stack-in @ stack stack-out @ or 0<> ;
 
@@ -634,19 +743,21 @@ set-current
     ." Cell * I_" c-name 2@ type ." (Cell *SP, Cell **FP)      /* " forth-name 2@ type
     ."  ( " stack-string 2@ type ."  ) */" cr
     ." /* " doc 2@ type ."  */" cr
-    ." NAME(" [char] " emit forth-name 2@ type [char] " emit ." )" cr
+    ." NAME(" quote forth-name 2@ type quote ." )" cr
     \ debugging
     ." {" cr
     declarations
     compute-offsets \ for everything else
-    data-stack stack-used? IF ." Cell *sp=SP;" cr THEN
-    fp-stack   stack-used? IF ." Cell *fp=*FP;" cr THEN
+    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 @ . [char] " emit c-filename 2@ type [char] " emit cr
+    ." #line " c-line @ . quote c-filename 2@ type quote cr
     c-code 2@ type
     ." }" cr
     stores
@@ -705,7 +816,7 @@ set-current
 
 : process-file ( addr u xt -- )
     >r
-    2dup filename 2!
+    save-mem 2dup filename 2!
     0 function-number !
     r/o open-file abort" cannot open file"
     warnings @ if