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MDK Compiler Optimizations. www.keil.com

August 2009 Revision 1.0

Application Note: 202

MDK-ARM Compiler Optimizations

Getting the Best Optimized Code for your Embedded Application

Abstract

This document examines the ARM Compilation Tools, as used inside the Keil MDK-ARM (Microcontroller

Development Kit), and how to use them to optimize your code for best performance or smallest code-size.

Contents

ARM Compilation Tools ......................................................................................................................................................... 2

Compiler Options for Embedded Applications ........................................................................................................................ 2

Optimizing for Smallest Code Size .......................................................................................................................................... 5

Compile the Measure example without any optimizations .................................................................................................. 5

Optimize the Measure example for Size .............................................................................................................................. 6

Optimizing for Best Performance ............................................................................................................................................ 7

Run the Dhrystone benchmark without any optimizations .................................................................................................. 7

Optimize the Dhrystone example for Performance .............................................................................................................. 8

Summary .................................................................................................................................................................................. 9

Revision History

• August 2009: Initial Version

Information in this file, the accompany manuals, and software is