[gforth] / gforth / prims2x.fs  

gforth: gforth/prims2x.fs

Diff for /gforth/prims2x.fs between version 1.52 and 1.53

version 1.52, Tue Nov 14 10:36:02 2000 UTC version 1.53, Wed Dec 13 09:51:28 2000 UTC
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 : printprim ( -- )  : printprim ( -- )
  output @ execute ;   output @ execute ;
   
 \ stack types  
   
 struct%  struct%
     cell% 2* field stack-pointer \ stackpointer name      cell% 2* field stack-pointer \ stackpointer name
     cell% 2* field stack-cast \ cast string for assignments to stack elements      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-in  \ number of stack items in effect in
     cell%    field stack-out \ number of stack items in effect out      cell%    field stack-out \ number of stack items in effect out
 end-struct stack%  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" -- )  : make-stack ( addr-ptr u1 addr-cast u2 "stack-name" -- )
     create stack% %allot >r      create stack% %allot >r
     save-mem r@ stack-cast 2!      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" sp" save-mem s" (Cell)" make-stack data-stack
 s" fp" save-mem s" "       make-stack fp-stack  s" fp" save-mem s" "       make-stack fp-stack
 s" rp" save-mem s" (Cell)" make-stack return-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  \ !! initialize stack-in and stack-out
   
 \ stack items  \ 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 -- )  : init-item ( addr u addr1 -- )
     \ initialize item at addr1 with name addr u      \ initialize item at addr1 with name addr u
     \ !! remove stack prefix      \ !! remove stack prefix
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 \ types  \ 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 -- )  : stack-access ( n stack -- )
     \ print a stack access at index n of stack      \ print a stack access at index n of stack
     stack-pointer 2@ type      stack-pointer 2@ type
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         drop ." TOS"          drop ." TOS"
     endif ;      endif ;
   
 : item-in-index ( item -- n )  : item-in-index { item -- n }
     \ n is the index of item (in the in-effect)      \ 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-single ( item -- )
  \ fetch a single stack item from its stack   \ fetch a single stack item from its stack
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 s" struct F83Name *"    single-type type-prefix f83name  s" struct F83Name *"    single-type type-prefix f83name
   
 return-stack stack-prefix R:  return-stack stack-prefix R:
   inst-stream  stack-prefix #
   
 set-current  set-current
   
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 : clear-stack { -- }  : clear-stack { -- }
     dup stack-in off stack-out off ;      dup stack-in off stack-out off ;
   
   
 : compute-offsets ( -- )  : compute-offsets ( -- )
     data-stack clear-stack  fp-stack clear-stack return-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-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 -- }  : flush-a-tos { stack -- }
     stack stack-out @ 0<> stack stack-in @ 0= and      stack stack-out @ 0<> stack stack-in @ 0= and
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     endif ;      endif ;
   
 : fill-tos ( -- )  : fill-tos ( -- )
       \ !! inst-stream for prefetching?
     fp-stack     fill-a-tos      fp-stack     fill-a-tos
     data-stack   fill-a-tos      data-stack   fill-a-tos
     return-stack fill-a-tos ;      return-stack fill-a-tos ;
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     endif ;      endif ;
   
 : stack-pointer-updates ( -- )  : stack-pointer-updates ( -- )
       inst-stream  stack-pointer-update
     data-stack   stack-pointer-update      data-stack   stack-pointer-update
     fp-stack     stack-pointer-update      fp-stack     stack-pointer-update
     return-stack stack-pointer-update ;      return-stack stack-pointer-update ;
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     ." {" cr      ." {" cr
     declarations      declarations
     compute-offsets \ for everything else      compute-offsets \ for everything else
       inst-stream  stack-used? IF ." Cell *ip=IP;" cr THEN
     data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN      data-stack   stack-used? IF ." Cell *sp=SP;" cr THEN
     fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN      fp-stack     stack-used? IF ." Cell *fp=*FP;" cr THEN
     return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN      return-stack stack-used? IF ." Cell *rp=*RP;" cr THEN

Generate output suitable for use with a patch program
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  Added in v.1.53
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