Diff for /gforth/float.fs between versions 1.24 and 1.26

version 1.24, 1999/02/03 00:10:20 version 1.26, 1999/05/06 21:33:32
Line 43 Line 43
 \ [THEN]  \ [THEN]
   
 : sfalign ( -- ) \ float-ext s-f-align  : sfalign ( -- ) \ float-ext s-f-align
       \G If the data-space pointer is not single-float-aligned, reserve
       \G enough space to align it.
     here dup sfaligned swap ?DO  bl c,  LOOP ;      here dup sfaligned swap ?DO  bl c,  LOOP ;
 : dfalign ( -- ) \ float-ext d-f-align  : dfalign ( -- ) \ float-ext d-f-align
       \G If the data-space pointer is not double-float-aligned, reserve
       \G enough space to align it.
     here dup dfaligned swap ?DO  bl c,  LOOP ;      here dup dfaligned swap ?DO  bl c,  LOOP ;
   
 1 sfloats constant sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus  1 sfloats constant sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus
   \G Increment @i{sf-addr1} by the number of address units corresponding to the size of
   \G a single-precision IEEE floating-point number, to give @i{sf-addr2}.""
 dofield: lastxt code-address! \ change the constant into a field  dofield: lastxt code-address! \ change the constant into a field
   
 1 dfloats constant dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus  1 dfloats constant dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus
   \G Increment @i{df-addr1} by the number of address units corresponding to the size of
   \G a double-precision IEEE floating-point number, to give @i{df-addr2}.""
 dofield: lastxt code-address! \ change the constant into a field  dofield: lastxt code-address! \ change the constant into a field
   
 : f, ( f -- )  here 1 floats allot f! ;  : f, ( f -- ) \ gforth
       \G Reserve data space for one floating-point number and store
       \G @i{f} in the space.
       here 1 floats allot f! ;
   
 : fconstant  ( r "name" -- ) \ float  : fconstant  ( r "name" -- ) \ float
     Create f,      Create f,
Line 61  DOES> ( -- r ) Line 72  DOES> ( -- r )
     f@ ;      f@ ;
   
 : fdepth ( -- +n ) \ floating f-depth  : fdepth ( -- +n ) \ floating f-depth
     \G +n is the current number of (floating-point) values on the      \G @var{+n} is the current number of (floating-point) values on the
     \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 ;  : FLit ( -- r )  r> dup f@ float+ >r ;
 : FLiteral ( compilation r -- ; run-time -- r ) \ float  : FLiteral ( compilation r -- ; run-time -- r ) \ float
     \G Compile appropriate code such that, at run-time, r is placed      \G Compile appropriate code such that, at run-time, @var{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+ dup faligned <>  WHILE  postpone noop  REPEAT
     postpone FLit  f, ;  immediate      postpone FLit  f, ;  immediate
   
 &15 Value precision ( -- u ) \ floating-ext  &15 Value precision ( -- u ) \ floating-ext
 \G u is the number of significant digits currently used by  \G @var{u} is the number of significant digits currently used by
 \G @code{F.} @code{FE.} and @code{FS.}   \G @code{F.} @code{FE.} and @code{FS.} 
 : set-precision ( u -- ) \ floating-ext  : set-precision ( u -- ) \ floating-ext
     \G Set the number of significant digits currently used by      \G Set the number of significant digits currently used by
     \G @code{F.} @code{FE.} and @code{FS.} to u.      \G @code{F.} @code{FE.} and @code{FS.} to @var{u}.
     to precision ;      to precision ;
   
 : scratch ( r -- addr len )  : scratch ( r -- addr len )
Line 93  DOES> ( -- r ) Line 104  DOES> ( -- r )
   IF  '- emit  THEN ;    IF  '- emit  THEN ;
   
 : f.  ( r -- ) \ floating-ext f-dot  : f.  ( r -- ) \ floating-ext f-dot
 \G Display (the floating-point number) r using fixed-point notation,  \G Display (the floating-point number) @var{r} using fixed-point notation,
 \G followed by a space.  \G followed by a space.
   f$ dup >r 0<    f$ dup >r 0<
   IF    '0 emit    IF    '0 emit
Line 104  DOES> ( -- r ) Line 115  DOES> ( -- r )
 \ Shouldn't precision indicate the number of places shown after the point?  \ Shouldn't precision indicate the number of places shown after the point?
   
 : fe. ( r -- ) \ floating-ext f-e-dot  : fe. ( r -- ) \ floating-ext f-e-dot
 \G Display r using engineering notation, followed by a space.  \G Display @var{r} using engineering notation, followed by a space.
   f$ 1- s>d 3 fm/mod 3 * >r 1+ >r    f$ 1- s>d 3 fm/mod 3 * >r 1+ >r
   scratch r@ min type '. emit  scratch r> /string type    scratch r@ min type '. emit  scratch r> /string type
   'E emit r> . ;    'E emit r> . ;
   
 : fs. ( r -- ) \ floating-ext f-s-dot  : fs. ( r -- ) \ floating-ext f-s-dot
 \G Display r using scientific notation, followed by a space.  \G Display @var{r} using scientific notation, followed by a space.
   f$ 1-    f$ 1-
   scratch over c@ emit '. emit 1 /string type    scratch over c@ emit '. emit 1 /string type
   'E emit . ;    'E emit . ;
Line 153  IS interpreter-notfound Line 164  IS interpreter-notfound
     \ does> ( -- f-addr )      \ does> ( -- f-addr )
   
 1.0e0 fasin 2.0e0 f* fconstant pi ( -- r ) \ gforth  1.0e0 fasin 2.0e0 f* fconstant pi ( -- r ) \ gforth
 \G FCONSTANT: r is the value pi; the ratio of a circle's area  \G FCONSTANT: @var{r} is the value pi; the ratio of a circle's area
 \G to its diameter.  \G to its diameter.
   
 : f2* ( r1 -- r2 ) \ gforth  : f2* ( r1 -- r2 ) \ gforth
     \G Multiply r1 by 2.0e0      \G Multiply @var{r1} by 2.0e0
     2.0e0 f* ;      2.0e0 f* ;
   
 : f2/ ( r1 -- r2 ) \ gforth  : f2/ ( r1 -- r2 ) \ gforth
     \G Multiply r1 by 0.5e0      \G Multiply @var{r1} by 0.5e0
     0.5e0 f* ;      0.5e0 f* ;
   
 : 1/f ( r1 -- r2 ) \ gforth  : 1/f ( r1 -- r2 ) \ gforth
     \G Divide 1.0e0 by r1      \G Divide 1.0e0 by @var{r1}.
     1.0e0 fswap f/ ;      1.0e0 fswap f/ ;
   
   

Removed from v.1.24  
changed lines
  Added in v.1.26


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