40 	uint32_t hx;  in log10()  local
43 	hx = u.i>>32;  in log10()
45 	if (hx < 0x00100000 || hx>>31) {  in log10()
48 		if (hx>>31)  in log10()
54 		hx = u.i>>32;  in log10()
55 	} else if (hx >= 0x7ff00000) {  in log10()
57 	} else if (hx == 0x3ff00000 && u.i<<32 == 0)  in log10()
61 	hx += 0x3ff00000 - 0x3fe6a09e;  in log10()
62 	k += (int)(hx>>20) - 0x3ff;  in log10()
63 	hx = (hx&0x000fffff) + 0x3fe6a09e;  in log10()
64 	u.i = (uint64_t)hx<<32 | (u.i&0xffffffff);  in log10()