C5
C5 = 2.08757232129817482790e-09, /* 0x3E21EE9E, 0xBDB4B1C4 */
r = z*(C1+z*(C2+z*C3)) + w*w*(C4+z*(C5+z*C6));
C5 = 0.0000000020876754400407278, /* 0x11eed8caaeccf1.0p-81 */
#define POLY(z) (z*(C1+z*(C2+z*(C3+z*(C4+z*(C5+z*(C6+z*C7)))))))
C5 = 0.2087675698786809897659225313136400793948e-8L,
#define POLY(z) (z*(C1+z*(C2+z*(C3+z*(C4+z*(C5+z*(C6+z*(C7+ \
tmp = tail + r + r2 * (C2 + r * C3) + r2 * r2 * (C4 + r * C5);
tmp = tail + r * C1 + r2 * (C2 + r * C3) + r2 * r2 * (C4 + r * C5);
tmp = tail + r + r2 * (C2 + r * C3) + r2 * r2 * (C4 + r * C5);