CTZ 61 source/common/threading.h #define CTZ(id, x) id = (unsigned long)__builtin_ctz(x) CTZ 75 source/common/threading.h #define CTZ(id, x) id = (unsigned long)__builtin_ctz(x) CTZ 88 source/common/threading.h #define CTZ(id, x) _BitScanForward(&id, x)