function exponentf( x ) {
	return addon( x );
}
Returns an integer corresponding to the unbiased exponent of a single-precision floating-point number.

@private
@param {number} x - single-precision floating-point number
@returns {integer8} unbiased exponent

@example
var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var exp = exponentf( toFloat32( 3.14e34 ) ); // => 2**114 ~ 2.08e34
// returns 114

@example
var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var exp = exponentf( toFloat32( 3.14e-34 ) ); // => 2**-112 ~ 1.93e-34
// returns -112

@example
var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var exp = exponentf( toFloat32( -3.14 ) );
// returns 1

@example
var exp = exponentf( 0.0 );
// returns -127

@example
var exp = exponentf( NaN );
// returns 128