Diff for /gforth/float.fs between versions 1.39 and 1.51

version 1.39, 2002/12/05 19:25:23 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 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 211  set-current Line 223  set-current
     \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 222  set-current Line 234  set-current
         fnegate f~rel          fnegate f~rel
     THEN ;      THEN ;
   
 1e 53 0 [do] f2* [loop] fconstant fround-offset \ 2^53  \ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com>
   \ not sure if they are a good idea
   
 : fround ( r1 -- r2 ) \ float f-round  : FTRUNC ( r1 -- r2 )
 \G Round to nearest integral value.  Break ties with round-to-even.      \ round towards 0
     \ assumes IEEE DP FP in round-to-even mode.      \ !! should be implemented properly
     \ for an explanation of this code read      F>D D>F ;
     \ <2002Oct26.113823@a0.complang.tuwien.ac.at> ff.  
     fdup f0> if  : FMOD ( r1 r2 -- r )
         fround-offset f- fround-offset f+      \ remainder of r1/r2
     else fdup f0< if \ leave 0e and -0e as is      FOVER FOVER F/ ftrunc F* F- ;
             fround-offset f+ fround-offset f-  
     then then ;  
   
 : f.s ( -- ) \ gforth f-dot-s  
     \G Display the number of items on the floating-point stack,  
     \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   
     ?DO  dup i - 1- floats fp@ + f@ f.  LOOP  drop ;   

Removed from v.1.39  
changed lines
  Added in v.1.51


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