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Instruction mmx - PADDUSB/PADDUSW—Packed Add Unsigned with Saturation

operand) to the individual unsigned data elements of the packed destination operand (first operand). If the result of an individual addition exceeds the range for the specified unsigned data type, the result is saturated. The destination operand must be an MMX technology register; the source operand can be either an MMX technology register or a quadword memory location. The PADDUSB instruction adds the unsigned bytes of the source operand to the unsigned bytes of the destination operand and stores the results to the destination operand. When an individual result is beyond the range of an unsigned byte (that is, greater than FFH), the saturated unsigned byte value of FFH is written to the destination operand. The PADDUSW instruction adds the unsigned words of the source operand to the unsigned words of the destination operand and stores the results to the destination operand. When an individual result is beyond the range of an unsigned word (that is, greater than FFFFH), the saturated unsigned word value of FFFFH is written to the destination operand.