如何将两个定点数相乘? [英] How do you multiply two fixed point numbers?

问题描述

我目前正在尝试找出如何在定点表示形式中将两个数字相乘.

I am currently trying to figure out how to multiply two numbers in fixed point representation.

说我的数字表示法如下:

Say my number representation is as follows:

[SIGN][2^0].[2^-1][2^-2]..[2^-14]

在我的情况下，为数字10.01000000000000 = -0.25.

In my case, the number 10.01000000000000 = -0.25.

例如，我该怎么做0.25x0.25或-0.25x0.25等?

How would I for example do 0.25x0.25 or -0.25x0.25 etc?

希望您能提供帮助！

推荐答案

乘以一个更大的变量，然后右移定点精度的位数.

Multiply into a larger sized variable, and then right shift by the number of bits of fixed point precision.

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