5.3.93 _Q31shl Function
This function shifts a Q31 value by num bits, to the left if
num is positive or to the right if num is
negative. The function takes care of saturating the result, in case of underflow or
overflow.
Include
<libq.h>
Prototype
_Q31 _Q31shl(_Q31 x, short num);
Arguments
x |
a fixed-point number in Q31 format, which ranges from -231 to 231-1. The value of this argument ranges from -2147483648 to 2147483647. |
num |
an integer number, which ranges from -31 to 31. |
Return Value
This function returns the shifted value of x in Q31 format. The value
ranges from -2147483648 to 2147483647.