version 1.24, 1999/02/03 00:10:20
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version 1.25, 1999/03/23 20:24:18
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Line 61 DOES> ( -- r )
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Line 61 DOES> ( -- r )
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f@ ; |
f@ ; |
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: 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 / ; |
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: 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 |
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&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 ; |
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: scratch ( r -- addr len ) |
: scratch ( r -- addr len ) |
Line 93 DOES> ( -- r )
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Line 93 DOES> ( -- r )
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IF '- emit THEN ; |
IF '- emit THEN ; |
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: 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 )
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Line 104 DOES> ( -- r )
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\ Shouldn't precision indicate the number of places shown after the point? |
\ Shouldn't precision indicate the number of places shown after the point? |
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: 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> . ; |
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: 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
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Line 153 IS interpreter-notfound
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\ does> ( -- f-addr ) |
\ does> ( -- f-addr ) |
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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. |
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: 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* ; |
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: 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* ; |
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: 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/ ; |
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