Assembler Reference
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All rights reserved. 3-15
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 page 7-18
• DCD and DCDU on page 7-19
• DCFD and DCFDU on page 7-21
• DCFS and DCFSU on page 7-22
• DCI on page 7-23
• DCQ and DCQU on page 7-24
• DCW and DCWU on page 7-25.
Register-relative labels
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 page 7-15
• SPACE on page 7-17
• DCDO on page 7-20
• EQU on page 7-57.
Absolute addresses
These are numeric constants. They are integers in the range 0 to 2
32
–1. They address the
memory directly.
