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.


{label} DCQ{U} {-}literal{,{-}literal}...



is a 64-bit numeric literal (see Numeric literals).

The range of numbers allowed is 0 to 264 – 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 –263 to –1.

The result of specifying -n is the same as the result of specifying 264n.


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:


        AREA    MiscData, DATA, READWRITE
data    DCQ     -225,2_101     ; 2_101 means binary 101.
        DCQU    number+4       ; number must already be defined.
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