AMD-K6-2ESLASH400AMZ datasheet(21/332 Pages) AMD

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Chapter 1

AMD-K6™-2E Processor

22529B/0—January 2000

AMD-K6™-2E Processor Data Sheet

Preliminary Information

Microarchitecture

T h e AMD-K6-2 E pr ocessor’s RISC 86 m i c roarch itec ture i s a decoupled

decode/execution superscalar design that implements state-of-the-art design

techniques to achieve leading-edge performance.

Advanced design techniques implemented in the AMD-K6-2E processor include

multiple x86 instruction decode, single-clock internal RISC operations, ten execution

units that support superscalar operation, out-of-order execution, data forwarding,

speculative execution, and register renaming.

In addition, the processor supports advance d branch prediction logic by

implementing an 8192-entry branch history table, a branch target cache, and a return

address stack, which combine to deliver better than a 95% prediction rate. These

design techniques enable the AMD-K6-2E to issue, execute, and retire multiple x86

ins tructio ns pe r clo ck, res ulting in ex cel le nt s cal able pe rfo rma nce. The

microarchitecture of the AMD-K6-2E processor is more completely described in

“Internal Architecture” on page 7.

3DNow!™ Technology

AMD’s 3DNow! technology is an instruction-set extension to x86, which includes 21

new instructions to accelerate 3D graphics and other single-precision floating-point

compute intensive operations.

Improvements include fast frame rates on high-resolution graphics applications,

superior modeling of real-world environments and physics, life-like images, graphics,

and audio.

AMD has already shipped millions of processors with 3DNow! technology for desktop

and notebook PCs, revolutionizing the 3D experience with up to four times the peak

floating-point performance of previous sixth generation solutions. AMD is now

bringing this advanced capability to embedded systems.

AMD has taken a leadership role in developing these new instructions that enable

exciting new levels of performance and realism. 3DNow! technology was defined and

implemented in collaboration with Microsoft, application developers, and graphics

vendors, and has received an enthusiastic reception. It is compatible with today’s

existing x86 software, is supported by industry-standard APIs, and requires no

operating system support, thereby enabling a broad class of applications to benefit

from 3DNow! technology.

Industry-Standard x86 Architecture

The AMD-K6-2E processor is x86 binary code compatible. AMD’s extensive

experience through six generations of x86 processors has been carefully integrated

into the processor to enable compatibility with Windows®-based operating systems,

including Windows 95, Windows 98, Windows CE, Windows NT®, and Windows NTE.

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