ISO/IEC 60559:2020 浮点运算

标准编号：ISO/IEC 60559:2020

中文名称：浮点运算

英文名称：Information technology — Microprocessor Systems — Floating-Point arithmetic

发布日期：2020-05

标准范围

ISO/IEC 60559:2020（E）规定了计算机系统中浮点运算的格式和方法——单精度、双精度、扩展精度和可扩展精度的标准函数和扩展函数——并推荐了数据交换格式。定义了异常条件，并规定了这些条件的标准处理。它提供了一种使用浮点数进行计算的方法，无论是在硬件、软件还是两者的组合中进行处理，都会产生相同的结果。给定相同的输入数据，计算结果将是相同的，与实现无关。无论执行情况如何，数学处理中的错误和错误条件都将以一致的方式报告。第二版以ISO/IEC 60559的形式发布，取代了第一版ISO/IEC/IEEE 60559:2011。

ISO/IEC 60559:2020(E) specifies formats and methods for floating-point arithmetic in computer systems - standard and extended functions with single, double, extended, and extendable precision - and recommends formats for data interchange. Exception conditions are defined and standard handling of these conditions is specified. It provides a method for computation with floating-point numbers that will yield the same result whether the processing is done in hardware, software, or a combination of the two. The results of the computation will be identical, independent of implementation, given the same input data. Errors, and error conditions, in the mathematical processing will be reported in a consistent manner regardless of implementation. This second edition, published as ISO/IEC 60559, replaces the first edition ISO/IEC/IEEE 60559:2011.

标准预览图