From: Fast computation of distance estimators
Symbol
Meaning
x >> I
Rihtshift x I bits.
x &y
Bitwise and of x and y
x ⊕ y
Bitwise xor of x and y
~ x
Bitwise negation of x
m 1
Mask where every other bit is 1.
m I
Mask where every other block of I = 2ibits are ones.