| package main | |
| func reverseBits2(num uint32) uint32 { | |
| num = (num << 16) | (num >> 16) | |
| num = ((num & 0x00ff00ff)<< 8) | ((num & 0xff00ff00) >> 8) | |
| num = ((num & 0x0f0f0f0f) << 4) | ((num & 0xf0f0f0f0) >> 4) | |
| num = ((num & 0x33333333) << 2) | ((num & 0xcccccccc) >> 2) | |
| num = ((num & 0x55555555) << 1) | ((num & 0xaaaaaaaa) >> 1) | |
| return num | |
| } |