nificant doubleword from the least significant doubleword of each pair, and packs the signed 32-bit result to the destination operand. When the source operand is a 128-bit memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated.</p>
<p>Legacy SSE version: Both operands can be MMX registers. The second source operand can be an MMX register or a 64-bit memory location.</p>
<p>128-bit Legacy SSE version: The first source and destination operan