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Writing ARM Assembly Language

Overview of the ARM architecture

Architecture versions

ARM, Thumb, Thumb‑2, and Thumb‑2EE instruction

ARM, Thumb, and ThumbEE state

Instruction set overview

Instruction capabilities

Structure of assembly language modules

Layout of assembly language source files

An example ARM assembly language module

Calling subroutines

Conditional execution

The ALU status flags

Conditional execution

Using conditional execution

Example of the use of conditional execution

Loading constants into registers

Direct loading with MOV and MVN

Loading with MOV32

Loading with LDR Rd, =const

Loading addresses into registers

Direct loading with ADR and ADRL

Loading addresses with LDR Rd, =label

Load and store multiple register instructions

Load and store multiple instructions available in

Implementing stacks with LDM and STM

Block copy with LDM and STM

Test‑and‑branch macro example

Unsigned integer division macro example

Using frame directives

Assembly language changes

Assembler Reference

ARM and Thumb Instructions

Directives Reference

Writing ARM Assembly Language

RealView^® Compilation Tools for µVision Assembler Guide

Version 3.1

Home > Writing ARM Assembly Language

Chapter 2. Writing ARM Assembly Language

Table of Contents

2.1. Introduction

2.2. Overview of the ARM architecture

2.2.1. Architecture versions
2.2.2. ARM, Thumb, Thumb‑2, and Thumb‑2EE instruction sets
2.2.3. ARM, Thumb, and ThumbEE state
2.2.4. Processor mode
2.2.5. Registers
2.2.6. Instruction set overview
2.2.7. Instruction capabilities

2.3. Structure of assembly language modules

2.3.1. Layout of assembly language source files
2.3.2. An example ARM assembly language module
2.3.3. Calling subroutines

2.4. Conditional execution

2.4.1. The ALU status flags
2.4.2. Conditional execution
2.4.3. Using conditional execution
2.4.4. Example of the use of conditional execution
2.4.5. The Q flag

2.5. Loading constants into registers

2.5.1. Direct loading with MOV and MVN
2.5.2. Loading with MOV32
2.5.3. Loading with LDR Rd, =const

2.6. Loading addresses into registers

2.6.1. Direct loading with ADR and ADRL
2.6.2. Loading addresses with LDR Rd, =label

2.7. Load and store multiple register instructions

2.7.1. Load and store multiple instructions available in ARM and Thumb
2.7.2. Implementing stacks with LDM and STM
2.7.3. Block copy with LDM and STM

2.8. Using macros

2.8.1. Test‑and‑branch macro example
2.8.2. Unsigned integer division macro example

2.9. Using frame directives

2.10. Assembly language changes

This chapter provides an introduction to the general principles of writing ARM^® Assembly Language. It contains the following sections:

Copyright © 2007 ARM Limited. All rights reserved.	ARM DUI 0379A
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