ARM VERSION 1.2

Assembler Reference

3.5.5 Labels

Labels are symbols representing the addresses in memory of instructions or data. They

can be program-relative, register-relative, or absolute.

Program-relative labels

These represent the program counter, plus or minus a numeric constant. Use them as

targets for branch instructions, or to access small items of data embedded in code

sections. You can define program-relative labels using a label on an instruction or on

one of the data definition directives. See:

•DCB on page7-18

•DCD and DCDU on page 7-19

•DCFD and DCFDU on page7-21

•DCFS and DCFSU on page7-22

•DCI on page7-23

•DCQ and DCQU on page7-24

•DCW and DCWU on page7-25.

These represent a named register plus a numeric constant. They are most often used to

access data in data sections. You can define them with a storage map. You can use the

EQU

directive to define additional register-relative labels, based on labels defined in

storage maps. See:

•MAP on page7-15

•SPACE on page7-17

•DCDO on page7-20

•EQU on page7-57.

Absolute addresses

These are numeric constants. They are integers in the range 0 to 232–1. They address the

memory directly.