This function finds the difference of two Q15 values. The function takes care of saturation during overflow and underflow occurrences.
Include
<libq.h>
Prototype
_Q15 _Q15sub(_Q15 x,_Q15 y);
Arguments
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. |
y |
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 x minus y in Q15
format. The value ranges from -32768 to 32767.