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7-24 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
7.3.11 DCQ and DCQU
The
DCQ
directive allocates one or more 8-byte blocks of memory, aligned on 4-byte
boundaries, and defines the initial runtime contents of the memory.
DCQU
is the same, except that the memory alignment is arbitrary.
Syntax
{label} DCQ{U} {-}literal{,{-}literal}...
where:
literal
is a 64-bit numeric literal (see Numeric literals on page 3-21).
The range of numbers allowed is 0 to 2
64
– 1.
In addition to the characters normally allowed in a numeric literal, you
can prefix
literal
with a minus sign. In this case, the range of numbers
allowed is –2
63
to –1.
The result of specifying
-n
is the same as the result of specifying 2
64
–
n
.
Usage
DCQ
inserts up to 3 bytes of padding before the first defined 8-byte block, if necessary,
to achieve 4-byte alignment.
Use
DCQU
if you do not require alignment.
See also:
• DCB on page 7-18
• DCD and DCDU on page 7-19
• DCW and DCWU on page 7-25
• SPACE on page 7-17.
Example
AREA MiscData, DATA, READWRITE
data DCQ -225,2_101 ; 2_101 means binary 101.
DCQU number+4 ; number must already be defined.