AMD OS1354WBJ4BGHBOX Optimization Guide - Page 1

AMD OS1354WBJ4BGHBOX - Third-Generation Opteron 2.2 GHz Processor Manual

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Software Optimization Guide for AMD Family 16h Processors Publication # 52128 Revision: 1.1 Issue Date: March 2013 Advanced Micro Devices

Section	Page
Contents	3
List of Figures	4
List of Tables	5
Revision History	6
1 Preface	7
2 Microarchitecture of the Family 16h Processor	8
2.1 Features	8
2.2 Instruction Decomposition	10
2.3 Superscalar Organization	10
2.4 Processor Block Diagram	11
2.5 Processor Cache Operations	11
2.5.1 L1 Instruction Cache	12
2.5.2 L1 Data Cache	12
2.5.3 L2 Cache	12
2.6 Memory Address Translation	13
2.6.1 L1 Translation Lookaside Buffers	13
2.6.2 L2 Translation Lookaside Buffers	13
2.6.3 Hardware Page Table Walker	13
2.7 Optimizing Branching	13
2.7.1 Branch Prediction	13
2.7.1.1 Next Address Logic	14
2.7.1.2 Branch Target Buffer	14
2.7.1.3 Branch Target Address Calculator	14
2.7.1.4 Out-of-Page Target Array	15
2.7.1.5 Branch Marker Caching	15
2.7.1.6 Return Address Stack	15
2.7.1.7 Indirect Target Predictor	16
2.7.1.8 Conditional Branch Predictor	16
2.7.1.9 Fetch Window Tracking Structure	16
2.7.2 Loop Alignment	16
2.7.2.1 Encoding Padding for Loop Alignment	16
2.7.2.2 Aligning Loops to Reduce Power Consumption	17
2.8 Instruction Fetch and Decode	18
2.9 Integer Unit	18
2.9.1 Integer Schedulers	18
2.9.2 Integer Execution Units	18
2.9.3 Retire Control Unit	19
2.10 Floating-Point Unit	19
2.10.1 Denormals	21
2.11 XMM Register Merge Optimization	22
2.12 Load Store Unit	23
Appendix A Instruction Latencies	24
A.1 Instruction Latency Assumptions	24

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Software

Optimization

Guide

for

AMD

Family

Processors

Publication #

52128

Revision:

1.1

Issue Date:

March 2013

Advanced

Micro

Devices