Справочник Пользователя для AMD 250
Chapter 3
General 64-Bit Optimizations
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Software Optimization Guide for AMD64 Processors
25112
Rev. 3.06
September 2005
Chapter 3
General 64-Bit Optimizations
In long mode, the AMD64 architecture provides both a compatibility mode, which allows a 64-bit
operating system to run existing 16-bit and 32-bit applications, and a 64-bit mode, which provides
64-bit addressing and expanded register resources to support higher performance for recompiled
64-bit programs. This chapter presents general optimizations that improve the performance of
software designed to run in 64-bit mode. Therefore, all optimizations in this chapter apply only to
64-bit software.
operating system to run existing 16-bit and 32-bit applications, and a 64-bit mode, which provides
64-bit addressing and expanded register resources to support higher performance for recompiled
64-bit programs. This chapter presents general optimizations that improve the performance of
software designed to run in 64-bit mode. Therefore, all optimizations in this chapter apply only to
64-bit software.
This chapter covers the following topics:
Topic
Page