The exp2sp function returns the exponential function of a real floating-point argument a. The return value is the number 2 raised to the power a. If the magnitude of a is too large, the maximum single-precision floating-point number (3.402823e+38 = 2^128) is returned.
Parameters:
[in]
a
= Input float
Returns:
Resultant float
Special Cases:
If a < -126, then the return value is 0.0.
If a > +128, then the return value is 3.402823e+38 (maximum single-precision floating-point number).
If a < -256, then the return value may be random for Asm implementation only.
