Chapter 11

Optimizing DSP Software – Code Optimization

Stephen Dew

Chapter Outline

Optimization process

Using the development tools

Compiler optimization

Basic compiler configuration

Target architecture

Endianness

Memory model

Initial optimization level

Enabling optimizations

Additional optimization configurations

Using the profiler

Analyzing compiled code

Background – understanding the DSP architecture

Resources

Basic C optimization techniques

Choosing the right data types

Use of intrinsics to leverage DSP features

Functions

Calling conventions

Pointers and memory access

Ensuring alignment

Restrict and pointer aliasing

Loops

Communicating loop count information

Hardware loops

Additional tips and tricks

Memory contention

Use of unaligned accesses ...

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