AMD-K6-2E/400AFR AMD [Advanced Micro Devices], AMD-K6-2E/400AFR Datasheet - Page 33
AMD-K6-2E/400AFR
Manufacturer Part Number
AMD-K6-2E/400AFR
Description
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AMD-K6-2E400AFR.pdf
(332 pages)
- Current page: 33 of 332
- Download datasheet (6Mb)
22529B/0—January 2000
Figure 4. AMD-K6™-2E Processor Decode Logic
Chapter 2
RISC86
On-Chip ROM
®
Sequencer
The AMD-K6-2E processor uses a combination of decoders to
convert x86 instructions into RISC86 operations. The hardware
consists of three sets of decoders—two parallel short decoders,
one long decoder, and one vector decoder.
Parallel Short Decoders. The two parallel short decoders translate
the most commonly-used x86 instructions ( moves, shifts,
branches, ALU, FPU) and the extensions to the x86 instruction
set (MMX and 3DNow! technology) into zero, one, or two
RISC86 operations each. The short decoders only operate on
x86 instructions that are up to seven bytes long. In addition, the
decoders are designed to decode up to two x86 instructions per
clock.
Instruction Buffer
Vector Address
Internal Architecture
Short Decoder #1
Short Decoder #2
Long Decoder
Vector Decoder
AMD-K6™-2E Processor Data Sheet
4 RISC86 Operations
15
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