fpu_dtof
s = fpu_dtof(fp, s, space[1]);
static int fpu_dtof(struct fpn *fp, uint32_t i, uint32_t j);
class = fpu_dtof(fp, hi, lo);
static int fpu_dtof(struct fpn *, u_int, u_int);
s = fpu_dtof(fp, s, space[1]);
int fpu_dtof(struct fpn *, u_int, u_int );