Principle of computer composition-control field of micro-instruction

Principle of computer composition-control field of micro-instruction

1. Overview

Machine language execution is interpreted as "a micro-program consisting of a number of micro-directives", and each micro-program contains several micro-commands.

Micro instruction is also divided into: horizontal micro-instructions and vertical micro-instructions. See also: http://blog.csdn.net/qust_waiwai/article/details/18632749 (horizontal type micro instruction and vertical type micro instruction), micro instruction-Baidu encyclopedia.

General structure of horizontal micro-directives: control field discriminant test field under Address field

　　

Number of bits in the control field:

　　

　　

Simply put, as the second question, the code 7, 3, 12, 5, 6 micro-commands need 3, 2, 4, 3, 3 bits, a total of 15.

The equivalent of each micro-instruction to contain a single command in each mutex class, a total of 5 articles.

Principle of computer composition-control field of micro-instruction