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Instruction mmx - MOVD—Move 32 Bits

Copies doubleword from the source operand (second operand) to the destination operand (first operand). Source and destination operands can be MMX technology registers, memory locations, or 32-bit general-purpose registers; however, data cannot be transferred from an MMX technology register to an MMX technology register, from one memory location to another memory location, or from one general-purpose register to another general-purpose register. When the destination operand is an MMX technology register, the 32-bit source value is written to the low-order 32 bits of the 64-bit MMX technology register and zero-extended to 64 bits). When the source operand is an MMX technology register, the low-order 32 bits of the MMX technology register are written to the 32-bit general-purpose register or 32-bit memory location selected with the destination operand.