contents of the AL register to contain the correct 1-digit unpacked BCD result.</p>
<p>If the addition produces a decimal carry, the AH register increments by 1, and the CF and AF flags are set. If there was no decimal carry, the CF and AF flags are cleared and the AH register is unchanged. In either case, bits 4 through 7 of the AL register are set to 0.</p>
<p>This instruction executes as described in compatibility mode and legacy mode. It is not valid in 64-bit mode.</p>
<h2 id="operation">Operation<a cl