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Arm Compiler armasm User Guide : DCW and DCWU

DCW and DCWU

The DCW directive allocates one or more halfwords of memory, aligned on two-byte boundaries, and defines the initial runtime contents of the memory. DCWU is the same, except that the memory alignment is arbitrary.

Syntax

{label} DCW{U} expr{,expr}...

where:

expr

is a numeric expression that evaluates to an integer in the range -32768 to 65535.

Usage

DCW inserts a byte of padding before the first defined halfword if necessary to achieve two-byte alignment.

Use DCWU if you do not require alignment.

Examples

data    DCW     -225,2*number   ; number must already be defined
        DCWU    number+4
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