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Diff for /gforth/float.fs between versions 1.39 and 1.44

version 1.39, 2002/12/05 19:25:23 version 1.44, 2004/12/08 11:05:08
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 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
Line 211  set-current Line 211  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 222  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      \ !! should be implemented properly
             fround-offset f+ fround-offset f-      FOVER FOVER F/ ftrunc F* 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.1.44

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