fpu_stof
s = fpu_stof(fp, s);
static int fpu_stof(struct fpn *fp, uint32_t i);
class = fpu_stof(fp, hi);
static int fpu_stof(struct fpn *, u_int);
s = fpu_stof(fp, s);
int fpu_stof(struct fpn *, u_int);