32位到16位浮点转换 [英] 32-bit to 16-bit Floating Point Conversion

问题描述

我需要一个能够在32位和16位浮点数之间转换的跨平台库/算法。我不需要对16位数执行数学运算;我只需要减小32位浮点数的大小，以便它们可以通过网络发送。我在C ++中工作。

I need a cross-platform library/algorithm that will convert between 32-bit and 16-bit floating point numbers. I don't need to perform math with the 16-bit numbers; I just need to decrease the size of the 32-bit floats so they can be sent over the network. I am working in C++.

我明白我将失去多少精确度，但我的应用程序可以。

I understand how much precision I would be losing, but that's OK for my application.

IEEE 16位格式很棒。

The IEEE 16-bit format would be great.

推荐答案

std :: frexp 从正常浮动或双精度中提取有效数和指数 - 决定如何处理太大而不适合半精度浮点（饱和...？）的指数，相应地进行调整，并将半精度数值放在一起。 本文有C源代码，以告诉您如何执行转换。

std::frexp extracts the significand and exponent from normal floats or doubles -- then you need to decide what to do with exponents that are too large to fit in a half-precision float (saturate...?), adjust accordingly, and put the half-precision number together. This article has C source code to show you how to perform the conversion.

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