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