目前已有若干版本的子程序库公开发表，它们各有特色。本程序库中的开平方算法为 快速逼近算法，它能达到牛顿迭代法同样的精度，而速度加快二十倍左右，超过双字节定点除法的速度。-So far, a number of versions of the subroutine library published, they have their own characteristics. Library in the square root algorithm for fast approximation