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/// halves-optimized method unrolled for 32-bit integer unsigned rbH1 (unsigned arg) { arg = ((arg << 1) & 0xAAAAAAAA) | ((arg >> 1) & 0x55555555); arg = ((arg << 2) & 0xCCCCCCCC) | ((arg >> 2) & 0x33333333); arg = ((arg << 4) & 0xF0F0F0F0) | ((arg >> 4) & 0x0F0F0F0F); arg = ((arg << 8) & 0xFF00FF00) | ((arg >> 8) & 0x00FF00FF); arg = ((arg << 16) & 0xFFFF0000) | ((arg >> 16) & 0x0000FFFF); return arg; }
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