_Q15abs Function

The function finds the absolute value of a Q15 value.

Include

<libq.h>

Prototype

_Q15 _Q15abs(_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 absolute value of x in Q15 format. The value ranges from 0 to 32767.

Note: _Q15abs(-32768) = 32767.

Also abs (smallest negative number) = largest positive number.