Performs a bitwise right shift operation.
shr(value, shift)
shr(8, 3); // returns 1 (1000 >> 3 = 0001)
shr(16, 2); // returns 4 (10000 >> 2 = 0001)
shr(5, 1); // returns 2 (0101 >> 1 = 0010)
bit not and or xor nand nor xnor shl shr