/// <summary>
/// 无符号右移，与JS中的>>>等价
/// </summary>
/// <param name="x">要移位的数</param>
/// <param name="y">移位数</param>
/// <returns></returns>
public static int UIntMoveRight(int x, int y)
{
int mask = 0x7fffffff; //Integer.MAX_VALUE
for (int i = 0; i < y; i++)
{
x >>= 1;
x &= mask;
}
return x;
}