AMD AMD-K6-2/400 User Guide - Page 33
Internal Architecture, 2.1 Microarchitecture Overview - instruction set
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23542A/0-September 2000 Preliminary Information AMD-K6™-2E+ Embedded Processor Data Sheet 2 Internal Architecture The AMD-K6-2E+ processor implements advanced design techniques known as the RISC86 microarchitecture. The RISC86 microarchitecture is a decoupled decode/execution design approach that yields superior sixth-generation performance for x86-based software. This chapter describes the techniques used and the functional elements of the RISC86 microarchitecture. 2.1 Microarchitecture Overview When discussing processor design, it is important to understand the terms architecture, microarchitecture, and design implementation. s Architecture refers to the instruction set and features of a processor that are visible to software programs running on the processor. The architecture determines what software the processor can run. The architecture of the AMD-K6-2E+ processor is the industry-standard x86 instruction set. s Microarchitecture refers to the design techniques used in the processor to reach the target cost, performance, and functionality goals. The AMD-K6 family of processors are based on a sophisticated RISC core known as the Enhanced RISC86 microarchitecture. The Enhanced RISC86 microarchitecture is an advanced, second-order decoupled decode/execution design approach that enables industry-leading performance for x86-based software. s Design implementation refers to the actual logic and circuit designs from which the processor is created according to the microarchitecture specifications. Chapter 2 Internal Architecture 11