Diff for /gforth/float.fs between versions 1.34 and 1.39

version 1.34, 2000/09/23 15:46:56 version 1.39, 2002/12/05 19:25:23
Line 72  DOES> ( -- r ) Line 72  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 102  DOES> ( -- r ) Line 102  DOES> ( -- r )
 : f.  ( r -- ) \ float-ext f-dot  : f.  ( r -- ) \ float-ext f-dot
 \G Display (the floating-point number) @i{r} without exponent,  \G Display (the floating-point number) @i{r} without exponent,
 \G followed by a space.  \G followed by a space.
   f$ dup >r 0<    f$ dup >r 0<=
   IF    '0 emit    IF    '0 emit
   ELSE  scratch r@ min type  r@ precision - zeros  THEN    ELSE  scratch r@ min type  r@ precision - zeros  THEN
   '. emit r@ negate zeros    '. emit r@ negate zeros
Line 180  IS interpreter-notfound Line 180  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 219  IS interpreter-notfound Line 222  IS interpreter-notfound
         fnegate f~rel          fnegate f~rel
     THEN ;      THEN ;
   
   1e 53 0 [do] f2* [loop] fconstant fround-offset \ 2^53
   
   : fround ( r1 -- r2 ) \ float f-round
   \G Round to nearest integral value.  Break ties with round-to-even.
       \ assumes IEEE DP FP in round-to-even mode.
       \ for an explanation of this code read
       \ <2002Oct26.113823@a0.complang.tuwien.ac.at> ff.
       fdup f0> if
           fround-offset f- fround-offset f+
       else fdup f0< if \ leave 0e and -0e as is
               fround-offset f+ fround-offset f-
       then then ;
   
 : f.s ( -- ) \ gforth f-dot-s  : f.s ( -- ) \ gforth f-dot-s
     \G Display the number of items on the floating-point stack,      \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.      \G followed by a list of the items; TOS is the right-most item.

Removed from v.1.34  
changed lines
  Added in v.1.39


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