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Diff for /gforth/float.fs between versions 1.35 and 1.51

version 1.35, 2001/08/07 09:39:30 version 1.51, 2007/07/06 12:54:56
Line 1 Line 1
 \ High level floating point                            14jan94py  \ High level floating point                            14jan94py
   
 \ Copyright (C) 1995,1997 Free Software Foundation, Inc.  \ Copyright (C) 1995,1997,2003,2004,2005,2006 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
Line 51 Line 51
     \G enough space to align it.      \G enough space to align it.
     here dup dfaligned swap ?DO  bl c,  LOOP ;      here dup dfaligned swap ?DO  bl c,  LOOP ;
   
 1 sfloats (Field) sfloat+ , ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus  (Field) sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus
 \G @code{1 sfloats +}.  \G @code{1 sfloats +}.
       1 sfloats ,
   
 1 dfloats (Field) dfloat+ , ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus  (Field) dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus
 \G @code{1 dfloats +}.  \G @code{1 dfloats +}.
       1 dfloats ,
       
 : f, ( f -- ) \ gforth  : f, ( f -- ) \ gforth
     \G Reserve data space for one floating-point number and store      \G Reserve data space for one floating-point number and store
     \G @i{f} in the space.      \G @i{f} in the space.
Line 72  DOES> ( -- r ) Line 74  DOES> ( -- r )
     \G floating-point stack.      \G floating-point stack.
     fp0 @ fp@ - [ 1 floats ] Literal / ;      fp0 @ fp@ - [ 1 floats ] Literal / ;
   
 : FLit ( -- r )  r> dup f@ float+ >r ;  
 : FLiteral ( compilation r -- ; run-time -- r ) \ float f-literal  : FLiteral ( compilation r -- ; run-time -- r ) \ float f-literal
     \G Compile appropriate code such that, at run-time, @i{r} is placed      \G Compile appropriate code such that, at run-time, @i{r} is placed
     \G on the (floating-point) stack. Interpretation semantics are undefined.      \G on the (floating-point) stack. Interpretation semantics are undefined.
     BEGIN  here cell+ dup faligned <>  WHILE  postpone noop  REPEAT      BEGIN  here cell+ cell+ dup faligned <>  WHILE  postpone noop  REPEAT
     postpone FLit  f, ;  immediate      postpone ahead here >r f, postpone then
       r> postpone literal postpone f@ ;  immediate
   
 &15 Value precision ( -- u ) \ float-ext  &15 Value precision ( -- u ) \ float-ext
 \G @i{u} is the number of significant digits currently used by  \G @i{u} is the number of significant digits currently used by
Line 127  DOES> ( -- r ) Line 129  DOES> ( -- r )
   scratch over c@ emit '. emit 1 /string type    scratch over c@ emit '. emit 1 /string type
   'E emit . ;    'E emit . ;
   
 require debugs.fs  
   
 : sfnumber ( c-addr u -- r true | false )  : sfnumber ( c-addr u -- r true | false )
     2dup [CHAR] e scan ( c-addr u c-addr2 u2 )      2dup [CHAR] e scan ( c-addr u c-addr2 u2 )
     dup 0=      dup 0=
Line 142  require debugs.fs Line 142  require debugs.fs
         2drop false          2drop false
     THEN ;      THEN ;
   
 :noname ( c-addr u -- )  [ifundef] compiler-notfound1
   defer compiler-notfound1
   ' no.extensions IS compiler-notfound1
   
   :noname compiler-notfound1 execute ; is compiler-notfound
   
   defer interpreter-notfound1
   ' no.extensions IS interpreter-notfound1
   
   :noname interpreter-notfound1 execute ; is interpreter-notfound
   [then]
   
   :noname ( c-addr u -- ... xt )
     2dup sfnumber      2dup sfnumber
     IF      IF
         2drop POSTPONE FLiteral          2drop [comp'] FLiteral
     ELSE      ELSE
         defers compiler-notfound          defers compiler-notfound1
     ENDIF ;      ENDIF ;
 IS compiler-notfound  IS compiler-notfound1
   
 :noname ( c-addr u -- r )  :noname ( c-addr u -- ... xt )
     2dup sfnumber      2dup sfnumber
     IF      IF
         2drop          2drop ['] noop
     ELSE      ELSE
         defers interpreter-notfound          defers interpreter-notfound1
     ENDIF ;      ENDIF ;
 IS interpreter-notfound  IS interpreter-notfound1
   
 : fvariable ( "name" -- ) \ float f-variable  : fvariable ( "name" -- ) \ float f-variable
     Create 0.0E0 f, ;      Create 0.0E0 f, ;
Line 180  IS interpreter-notfound Line 192  IS interpreter-notfound
     \G Divide 1.0e0 by @i{r1}.      \G Divide 1.0e0 by @i{r1}.
     1.0e0 fswap f/ ;      1.0e0 fswap f/ ;
   
   get-current environment-wordlist set-current
   1.7976931348623157e308 FConstant max-float
   set-current
   
 \ We now have primitives for these, so we need not define them  \ We now have primitives for these, so we need not define them
   
Line 208  IS interpreter-notfound Line 223  IS interpreter-notfound
     \G @code{f~abs}; r3=0: bitwise comparison; r3<0: @code{fnegate f~rel}.      \G @code{f~abs}; r3=0: bitwise comparison; r3<0: @code{fnegate f~rel}.
     fdup f0=      fdup f0=
     IF \ bitwise comparison      IF \ bitwise comparison
         fp@ float+ 1 floats over float+ -text 0=          fp@ float+ 1 floats over float+ over str=
         fdrop fdrop fdrop          fdrop fdrop fdrop
         EXIT          EXIT
     THEN      THEN
Line 219  IS interpreter-notfound Line 234  IS interpreter-notfound
         fnegate f~rel          fnegate f~rel
     THEN ;      THEN ;
   
 : f.s ( -- ) \ gforth f-dot-s  \ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com>
     \G Display the number of items on the floating-point stack,  \ not sure if they are a good idea
     \G followed by a list of the items; TOS is the right-most item.  
     ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0   : FTRUNC ( r1 -- r2 )
     ?DO  dup i - 1- floats fp@ + f@ f.  LOOP  drop ;       \ round towards 0
       \ !! should be implemented properly
       F>D D>F ;
   
   : FMOD ( r1 r2 -- r )
       \ remainder of r1/r2
       FOVER FOVER F/ ftrunc F* F- ;
Removed from v.1.35  
changed lines
  Added in v.1.51

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