function kernelSinf( x ) {
	return addon( x );
}
Computes the sine of a number on \\( \[-\pi/4, \pi/4] \\) in single-precision floating-point format, where \\( \pi/4 \approx 0.785398164 \\).

@private
@param {number} x - input value (in radians, assumed to be bounded by ~pi/4 in magnitude)
@returns {number} sine

@example
var v = kernelSinf( 0.0 );
// returns ~0.0

@example
var v = kernelSinf( 3.141592653589793/6.0 );
// returns ~0.5

@example
var v = kernelSinf( 0.619 );
// returns ~0.580

@example
var v = kernelSinf( NaN );
// returns NaN