4. Basic Code Optimization Strategies and Techniques

This section discusses basic code optimization techniques that can be applied to C/C++ code that will run on the C7000 DSP core.

Contents:

• 4.1. Overview of the Compilation Process
• 4.2. Selecting Compiler Options
  • 4.2.1. Selecting Compiler Options for Best Performance
  • 4.2.2. Selecting Compiler Options for Lowest Code Size
  • 4.2.3. Understanding the Performance and Code Size Tradeoff
  • 4.2.4. Compiler Options that Provide Additional Information
• 4.3. Automatic Use of the Streaming Engine and Streaming Address Generator
• 4.4. Using Existing Optimized Libraries
• 4.5. Signed Types for Iteration Counters and Limits
• 4.6. Use of the restrict Keyword
  • 4.6.1. The Restrict Keyword
  • 4.6.2. Compiler-Emitted Restrict Advice
  • 4.6.3. Run-Time Alias Disambiguation
  • 4.6.4. Loop-Carried Dependencies
• 4.7. Function Calls and Inlining
• 4.8. MUST_ITERATE and PROB_ITERATE Pragmas and Attributes
• 4.9. Floating-Point Division
• 4.10. C++ Features to Use and Avoid
• 4.11. Memory Optimizations
• 4.12. Vector Programming and the Scalable Vector Programming Model
  • 4.12.1. Vector Types
  • 4.12.2. Scalable Vector Programming Model