In [30]:

    

2 ^ 32, 1 << 32, 2 << 31


    

    
Out[30]:





(4294967296, 4294967296, 4294967296)

In [10]:

    

@time 1 << 31
@time 2 ^ 31


    

    




  0.000010 seconds (5 allocations: 176 bytes)
  0.000127 seconds (5 allocations: 176 bytes)






    
Out[10]:





2147483648

In [37]:

    

function roll(x, n)
    return (x << n) % (1 << 32) + (x >> (32 - n))
end


    

    
Out[37]:





roll (generic function with 1 method)

In [39]:

    

a = 0x11111111
b = 0x01020304
c = 0x77777777
d = 0x01234567
println(c + d)
println(0x789abcde)
c = c + d
println(xor(b, c))
println(0x7998bfda)
b = xor(b, c)
println(roll(b, 7))
println(0xcc5fed3c)


    

    




2023406814
2023406814
2040053722
2040053722
3428838716
3428838716

In [48]:

    

function quarter_round(a, b, c, d)
    a = (a + b) % (1 << 32)
    d = roll(xor(d, a), 16)
    c = (c + d) % (1 << 32)
    b = roll(xor(b, c), 12)
    a = (a + b) % (1 << 32)
    d = roll(xor(d, a),  8)
    c = (c + d) % (1 << 32)
    b = roll(xor(b, c),  7)
    return a, b, c, d
end


    

    
Out[48]:





quarter_round (generic function with 2 methods)

In [49]:

    

a = 0x11111111
b = 0x01020304
c = 0x9b8d6f43
d = 0x01234567

quarter_round(a, b, c, d)


    

    
Out[49]:





(0x00000000ea2a92f4, 0x00000000cb1cf8ce, 0x000000004581472e, 0x000000005881c4bb)

In [50]:

    

typeof(a)


    

    
Out[50]:





UInt32

In [51]:

    

0xea2a92f4, 0xcb1cf8ce, 0x4581472e, 0x5881c4bb


    

    
Out[51]:





(0xea2a92f4, 0xcb1cf8ce, 0x4581472e, 0x5881c4bb)

In [ ]:

    




    

In [ ]:

    




    

In [ ]:

    




    

In [ ]:

    




    

In [ ]:

    




    

In [ ]: