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ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All rights reserved. 3-23
3.6.6 Register-relative and program-relative expressions
A register-relative expression evaluates to a named register plus or minus a numeric
constant (see MAP on page 7-15).
A program-relative expression evaluates to the program counter (pc), plus or minus a
numeric constant. It is normally a label combined with a numeric expression.
Example
LDR r4,=data+4*n ; n is an assembly-time variable
; code
MOV pc,lr
data DCD value0
; n-1 DCD directives
DCD valuen ; data+4*n points here
; more DCD directives
3.6.7 Logical expressions
Logical expressions consist of combinations of logical literals (
{TRUE}
or
{FALSE}
),
logical variables, Boolean operators, relations, and parentheses (see Boolean operators
on page 3-31).
Relations consist of combinations of variables, literals, constants, or expressions with
appropriate relational operators (see Relational operators on page 3-30).
3.6.8 Logical literals
There are only two logical literals:
•
{TRUE}
•
{FALSE}
.