Module malachite_base::num::arithmetic::xxxx_add_yyyy_to_zzzz

XXXXAddYYYYToZZZZ, a trait for adding two quadruple-width numbers and returning the result as a quadruple-width number.

xxxx_add_yyyy_to_zzzz

use malachite_base::num::arithmetic::traits::XXXXAddYYYYToZZZZ;

assert_eq!(
    u64::xxxx_add_yyyy_to_zzzz(0x12, 0x34, 0x56, 0x78, 0x33, 0x33, 0x33, 0x33),
    (0x45, 0x67, 0x89, 0xab)
);
assert_eq!(
    u8::xxxx_add_yyyy_to_zzzz(0x78, 0x9a, 0xbc, 0xde, 0xfe, 0xdc, 0xba, 0x98),
    (0x77, 0x77, 0x77, 0x76)
);