_Q15acos Function

This function finds the arc cosine of a Q15 value.

Include

<libq.h>

Prototype

_Q15 _Q15acos(_Q15 x);

Argument

`x`	a fixed-point number in Q15 format, which ranges from -2¹⁵ to 2¹⁵-1. Therefore the value of this argument ranges from 17705 to 32767.

Return Value

This function returns the arc cosine of x in Q15 format. The value ranges from 256 to 32767.