请教浮点程序转化为定点程序的问题，具体程序见内容

woodmansx

Please write a fixed point version of the following
function:

float Z(float A, float B, float C)
{
   return 1 / sqrt(A*B + C);
}

A, B and C can have values in the range [0.001...1 ].
CPU is 32bit.
Table lookup for Z cannot be used.