行为语言 第3-2部分：VHDL中的数学运算

[中文适用范围]： 该标准体现在 MATH_REAL 和 MATH_COMPLEX 包声明中，以及标准数学定义的语义和作为该标准一部分的函数的常规含义以及 1.3 中。附件 A 中的信息是对用户和实施者的指南，并不是本标准的规范部分，但建议了人们可以使用这组软件包的方式。附件 B 中的信息作为实施者的指南提供，不是本标准的规范部分，但建议实施者实施本标准的方法。选择这组包中的函数是因为它们具有广泛的实用性，也因为需要它们来支持一般浮点用法和构建其他通用包。 [外文原描述]： This set of packages provides a standard for the declaration of most frequently used real and complex elementary functions required for numerically oriented modeling applications. Use of these packages with their defined data types, constants, and functions is intended to provide a mechanism for writing VHDL models (compliant with IEEE Std 1076-1993) that are portable and interoperable with other VHDL models adhering to this standard. The standard serves a broad class of applications with reasonable ease of use and requires implementations that are of high quality. This standard includes package bodies, as described in annex B, which are available in electronic format either on a diskette affixed to the back cover, or as a downloadable file from the IEC Web Store.