
a = 00
b = 00

a = 01
b = ffffffff00000001000000000000000000000000fffffffffffffffffffffffe

a = 02
b = ffffffff00000001000000000000000000000000fffffffffffffffffffffffd

a = 03
b = ffffffff00000001000000000000000000000000fffffffffffffffffffffffc

a = ffffffff00000001000000000000000000000000fffffffffffffffffffffffe
b = 01

a = 7fffffff800000008000000000000000000000007fffffffffffffffffffffff
b = 7fffffff80000000800000000000000000000000800000000000000000000000

a = 7fffffff80000000800000000000000000000000800000000000000000000000
b = 7fffffff800000008000000000000000000000007fffffffffffffffffffffff

a = 8000000000000000000000000000000000000000000000000000000000000000
b = 7fffffff00000001000000000000000000000000ffffffffffffffffffffffff
