位运算实现ushort(16位)转化成long(64位)以及int(32位)

public static long ushortTolong(ushort pre48, ushort pre32, ushort pre16, ushort pre0)
{
　　ulong rt = 0;
　　ulong temp = 0;

　　temp = pre48;
　　rt = temp << 48;
　　temp = pre32;
　　temp = temp << 32;
　　rt = rt | temp;
　　temp = pre16;
　　temp = temp << 16;
　　rt = rt | temp;
　　temp = pre0;
　　rt = rt | temp;

　　return (long)(rt >> 1);
}

public static int ushortToint(ushort pre16, ushort pre0)
{
　　uint rt = 0;
　　uint temp = 0;

　　temp = pre16;
　　temp = temp << 16;
　　rt = rt | temp;
　　temp = pre0;
　　rt = rt | temp;

　　return (int)(rt >> 1);
}