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