AMD Athlon Processor x86 Manuals

Manuals and User Guides for AMD Athlon Processor x86. We have 1 AMD Athlon Processor x86 manual available for free PDF download: Optimization Manual

AMD Athlon Processor x86 Optimization Manual (256 pages)

x86 Code Optimization

Brand: AMD | Category: Computer Hardware | Size: 3 MB

Table of Contents
3
Revision History
15
1 Introduction

17
2 Top Optimizations

23
100 C Source Level Optimizations

29
4 Instruction Decoding Optimizations

49
5 Cache and Memory Optimizations

61
6 Branch Optimizations

73
7 Scheduling Optimizations

83
- Schedule Instructions According to Their Latency
  83
- Unrolling Loops
  83
  - Complete Loop Unrolling
    83
  - Partial Loop Unrolling
    84
- Use Function Inlining
  87
  - Overview
    87
  - Always Inline Functions if Called from One Site
    88
  - Instructions
    88
- Avoid Address Generation Interlocks
  88
- Use MOVZX and MOVSX
  89
- Minimize Pointer Arithmetic in Loops
  89
- Push Memory Data Carefully
  91
8 Integer Optimizations

93
9 Floating-Point Optimizations

113
3 Dnow!™ and MMX™ Optimizations

123
11 General X86 Optimization Guidelines

143
- Short Forms
  143
- Dependencies
  144
- Register Operands
  144
- Stack Allocation
  144
Appendix A

145
- AMD Athlon Processor Microarchitecture
  146
  - Superscalar Processor
    146
  - Instruction Cache
    147
  - Figure 1. AMD Athlon™ Processor Block Diagram
    147
  - Predecode
    148
  - Branch Prediction
    148
  - Early Decoding
    149
  - Instruction Control Unit
    150
  - Data Cache
    150
  - Integer Scheduler
    151
  - Integer Execution Unit
    151
  - Figure 2. Integer Execution Pipeline
    151
  - Floating-Point Scheduler
    152
  - Floating-Point Execution Unit
    153
  - Figure 3. Floating-Point Unit Block Diagram
    153
  - Load-Store Unit (LSU)
    154
  - Figure 4. Load/Store Unit
    154
  - L2 Cache Controller
    155
  - Write Combining
    155
  - AMD Athlon System Bus
    155
AMD Athlon™ Processor Microarchitecture

145
- Introduction
  145
Appendix B Pipeline and Execution Unit Resources Overview

157
Appendix C Implementation of Write Combining

171
- Introduction
  171
- Write-Combining Definitions and Abbreviations
  172
- What Is Write Combining
  172
- Programming Details
  172
- Write-Combining Operations
  173
Appendix D Performance-Monitoring Counters

177
- Overview
  177
- Performance Counter Usage
  177
- Event and Time-Stamp Monitoring Software
  184
- Monitoring Counter Overflow
  185
Appendix E Programming the MTRR and PAT

187
Appendix F Instruction Dispatch and Execution Resources

203
- Table 19. Integer Instructions
  204
- Table 20. MMX™ Instructions
  224
- Table 21. MMX Extensions
  227
- Table 22. Floating-Point Instructions
  228
- Table 23. 3Dnow!™ Instructions
  233
- Table 24. 3Dnow! Extensions
  234
Appendix G Directpath Versus Vectorpath Instructions

235
Index

253

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AMD Athlon Processor x86 Manuals

AMD Athlon Processor x86 Optimization Manual (256 pages)

Table of Contents

1 Introduction

2 Top Optimizations

100 C Source Level Optimizations

4 Instruction Decoding Optimizations

5 Cache and Memory Optimizations

6 Branch Optimizations

7 Scheduling Optimizations

8 Integer Optimizations

9 Floating-Point Optimizations

3 Dnow!™ and MMX™ Optimizations

11 General X86 Optimization Guidelines

Appendix A

AMD Athlon™ Processor Microarchitecture

Appendix B Pipeline and Execution Unit Resources Overview

Appendix C Implementation of Write Combining

Appendix D Performance-Monitoring Counters

Appendix E Programming the MTRR and PAT

Appendix F Instruction Dispatch and Execution Resources

Appendix G Directpath Versus Vectorpath Instructions

Index

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