y0 = x0 ^ x8 ^ x7
y1 = x1 ^ x9 ^ x8
y2 = x2 ^ x10 ^ x9
y3 = x3 ^ x11 ^ x10
y4 = x4 ^ x12 ^ x11
y5 = x5 ^ x13 ^ x12
y6 = x6 ^ x14 ^ x13
y7 = x7 ^ x15 ^ x14
y8 = x8 ^ x16 ^ x15
y9 = x9 ^ x17 ^ x16
y10 = x10 ^ x18 ^ x17
y11 = x11 ^ x19 ^ x18
y12 = x12 ^ x20 ^ x19
y13 = x13 ^ x21 ^ x20
y14 = x14 ^ x22 ^ x21
y15 = x15 ^ x23 ^ x22
y16 = x16 ^ x24 ^ x23
y17 = x17 ^ x25 ^ x24
y18 = x18 ^ x26 ^ x25
y19 = x19 ^ x27 ^ x26
y20 = x20 ^ x28 ^ x27
y21 = x21 ^ x29 ^ x28
y22 = x22 ^ x30 ^ x29
y23 = x23 ^ x31 ^ x30
y24 = x24 ^ x0 ^ x31
y25 = x25 ^ x1 ^ x0
y26 = x26 ^ x2 ^ x1
y27 = x27 ^ x3 ^ x2
y28 = x28 ^ x4 ^ x3
y29 = x29 ^ x5 ^ x4
y30 = x30 ^ x6 ^ x5
y31 = x31 ^ x7 ^ x6