#include <80C517.h>
float tan517 (
float x); /* value to calculate tangent of */
Description
The tan517 function calculates the tangent of the
floating-point value x.
Note
This routine uses the arithmetic unit of the Infineon
C517x/C509 to provide accelerated execution speed. Do not use this
routine with a CPU that does not support this feature.
Return Value
The tan517 function returns the tangent of x.
The value of x must be in the range ±2^32
(±4294967296.0). Outside this value range an NaN error is
returned.
For x = c (±π/2;), {c = (2k+1); k ∈
N}, tan517 returns ±INF.
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