cos517

#include <80c517.h>

float cos517 (
  float x);      /* number to calculate cosine for */

The cos517 function calculates the cosine of the floating-point value x. The value of x must be in the range ±2^32 (±4294967296.0). Outside this value range an NaN error is returned.

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.

The cos517 function returns the cosine for the value x.

cos, sin517, sinh, tan517, tanh

#include <80c517.h>
#include <stdio.h> /* for printf */

void tst_cos (void) {
  float x;
  float y;

  for (x = 0; x < (2 * 3.1415); x += 0.1) {
    y = cos517 (x);

    printf ("COS517(%f) = %f\n", x, y);
  }
}