.duald. prefix.
.endduald. prefix.
.atmpr31.
The .dual, .enddual, and .atmp directives are available only in the Intel syntax mode.
Both syntaxes allow for the standard .align directive. However,
the Intel syntax additionally allows keywords for the alignment
parameter: ".align type", where `type' is one of .short, .long,
.quad, .single, .double representing alignments of 2, 4,
16, 4, and 8, respectively.