function cpolar( z ) {
	var o = new Float64Array( 2 );
	addon( z, o );
	return o;
}
Computes the absolute value and the phase of a double-precision complex floating-point number.

@private
@param {Complex128} z - complex number
@returns {Float64Array} absolute value and phase (in radians)

@example
var Complex128 = require( '@stdlib/complex/float64/ctor' );

var o = cpolar( new Complex128( 5.0, 3.0 ) );
// returns <Float64Array>[ ~5.83, ~0.5404 ]