version 1.35, 2001/08/07 09:39:30
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version 1.39, 2002/12/05 19:25:23
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Line 72 DOES> ( -- r )
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Line 72 DOES> ( -- r )
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\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 ; |
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: 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 |
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r> postpone literal postpone f@ ; immediate |
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&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 180 IS interpreter-notfound
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Line 180 IS interpreter-notfound
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\G Divide 1.0e0 by @i{r1}. |
\G Divide 1.0e0 by @i{r1}. |
1.0e0 fswap f/ ; |
1.0e0 fswap f/ ; |
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get-current environment-wordlist set-current |
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1.7976931348623157e308 FConstant max-float |
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set-current |
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\ We now have primitives for these, so we need not define them |
\ We now have primitives for these, so we need not define them |
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Line 219 IS interpreter-notfound
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Line 222 IS interpreter-notfound
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fnegate f~rel |
fnegate f~rel |
THEN ; |
THEN ; |
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1e 53 0 [do] f2* [loop] fconstant fround-offset \ 2^53 |
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: fround ( r1 -- r2 ) \ float f-round |
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\G Round to nearest integral value. Break ties with round-to-even. |
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\ assumes IEEE DP FP in round-to-even mode. |
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\ for an explanation of this code read |
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\ <2002Oct26.113823@a0.complang.tuwien.ac.at> ff. |
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fdup f0> if |
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fround-offset f- fround-offset f+ |
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else fdup f0< if \ leave 0e and -0e as is |
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fround-offset f+ fround-offset f- |
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then then ; |
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: 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. |