Created
April 3, 2013 15:31
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number of last 0 in 32bit binary number from http://www.matrix67.com/blog/archives/3985
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| c=(0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, | |
| 31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9) | |
| def num_of_last_0_in_32bit(v): | |
| return c[(0xffffffff & ((v&-v) * 0x077CB531)) >> 27] |
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