5.3.14 _Q15cosPI Function
This function finds the cosine of PI (π) times a Q15 value.
Include
<libq.h>
Prototype
_Q15 _Q15cosPI(_Q15 x);
Argument
x |
a fixed-point number in Q15 format, which ranges from -215 to 215-1. The value of this argument ranges from -32768 to 32767. |
Return Value
This function returns the cosine of PI times x in Q15
format. The value ranges from -32768 to 32767.