int
sgl_to_dbl_fcnvuf(
			unsigned int *srcptr,
			unsigned int *nullptr,
			dbl_floating_point *dstptr,
			unsigned int *status)
int
sgl_to_dbl_fcnvuf(
			unsigned int *srcptr,
			unsigned int *_nullptr,
			dbl_floating_point *dstptr,
			unsigned int *status)