utils.py 文件源码

def ctz(val, _type):
    cnt = int()
    power = int()
    if _type == 'uint32':
        bits = np.uint32(val)
        while power < 32:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power += 1
    elif _type == 'uint64':
        bits = bin(np.uint64(val))
        while power < 64:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power += 1
    else:
        raise Exception(Colors.red + "unsupported type passed to ctz." + Colors.ENDC)
    return cnt