This chapter gives a basic, practical understanding of how to write ARM and Thumb assembly language modules. It also gives information on the facilities provided by the ARM assembler (armasm).

This chapter does not provide a detailed description of the ARM, Thumb, or VFP instruction sets. This information can be found in Chapter 4 ARM Instruction Reference, Chapter 5 Thumb Instruction Reference, and Chapter 6 Vector Floating-point Programming. Further information can be found in ARM Architecture Reference Manual.