- (fpsplit x)syntax
Returns nonoverlapping (values y2 y1), each with 26 bits precision, with (fpabs y2) > (fpabs y1), such that (fp+ y2 y1) = x. For (flabs x) > 1.3393857490036326e+300, returns (values +nan.0 +nan.0).
Used to implement double-double multiplication.