language agnostic - Find a pattern of binary numbers using shift-right and bitwise-AND? -


I am trying to write a function in the assembly that will find out that now there is a small binary pattern in a binary number.

Example:
Does 100111 contain 1001 ?

When I read this problem, I felt that when I changed the linear (logical) in a loop with a bitwar- and large number and its small pattern,

So, in my head I thought it would be: 

  100111 and 1001 = 0 Shift-right 1 010011 and 1001 = 0 Shift-right 1 001001 and 1001 = 1 // found pattern!

And repeat it until it becomes zero or else returns 1.

However, I think I should be confused because it is returning 1 for most things I keep on the first part of the loop. Am I confused on my use?

The problem is that "partial matches" also returns a non-zero value for your end check It is: 

  100111 and 001001 = 000001

then this test matches any bits, but you are sure All bits are the same and should be equivalent to the pattern you are looking for: 

  x = 100111 if found (printed by X and 1001 == 1001) "

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