Français
7. Special instructions in instruction sets
In the various instruction sets, depending on the type of application targeted, we find specific instructions, both in general-purpose instruction sets and in specific instruction sets for buried or embedded applications.
7.1 Support for decimal calculation
Business applications involve exact operations on decimal data, which can only be achieved with decimal operations. Instruction sets can provide support for such "rounding-free" decimal operations.
IA-32 still contains DAA and DAS instructions dating from 8086, which, after binary addition (or subtraction) instructions of two 8-bit registers each containing two decimal digits (in binary-coded decimal), adjust the result of the binary addition to give the correct result. The underlying...
The Ultimate Scientific and Technical Reference
This article is included in
Software technologies and System architectures
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Special instructions in instruction sets
Examples of instruction sets
Bibliography
The Ultimate Scientific and Technical Reference
