Difference: FloatingPointUnit (40 vs. 41)

Revision 412022-12-01 - PeterSchmid

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Words Using the C Math Library

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< C mathematical functions @ Wikipedia

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> FPU support without trigonometric, hyperbolic and exponential functions is not even half the battle. Fortunately there is the GNU C math library. C mathematical functions @ Wikipedia

fsin    ( r1 -- r2 )       r2 is the sine of the radian angle r1

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RC time constant

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< 2.2n 47k f* fm. 103u ok.

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2.2n 47k f* dup fm. 103u ok. cutoff frequency

2e pi f* f* 1e swap f/ fm. 1.54k  ok.

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< Mecrisp-Cube has the word f. defined as an assembler routine in fpu.s, but the example here is written in Forth. I use a dot for the decimal separator. Terry Porter "because those crazy Europeans use a comma instead of a decimal point". Not all europeans are crazy, at least the Swiss are an exception ;-), they use sometimes decimal points.

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> Mecrisp-Cube has the word f. defined as an assembler routine in fpu.s, but the example here is written in Forth. I use a dot for the decimal separator. Terry Porter "because those crazy Europeans use a comma instead of a decimal point". Not all europeans are crazy, at least the Swiss are an exception ;-), they use decimal points (but not always, for details see https://en.wikipedia.org/wiki/Decimal_separator).

: f. ( r -- )  \ display, with a trailing space, the floating-point number r in fixed-point notation
  dup  f0< if

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