Millicode in an IBM zSeries processor
Millicode in an IBM zSeries processor
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IBM zSeries 处理器中的 Millicode
DOI：
10.1147/rd.483.0425
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Mark S. Farrell
中科院分区：
文献类型：
--
作者：
L. Heller;Mark S. Farrell
由于zSeries®处理器的体系结构复杂，因此使用名为毫码的内部代码来实现这些系统提供的许多功能。虽然硬件可以执行许多逻辑上不太复杂的高性能指令，但需要毫码来实现更复杂的指令，以及提供主要与中央处理器相关的额外支持功能。本文介绍了Z990系统对微码的处理，并介绍了Z990系统对微码处理的改进。它具体讨论了毫码为Z990系统提供的灵活性。
Because of the complex architecture of the zSeries® processors, an internal code, called millicode, is used to implement many of the functions provided by these systems. While the hardware can execute many of the logically less complex and high-performance instructions, millicode is required to implement the more complex instructions, as well as to provide additional support functions related primarily to the central processor. This paper is a review of millicode on previous zSeries CMOS systems and also describes enhancements made to the z990 system for processing of the millicode. It specifically discusses the flexibility millicode provides to the z990 system.