x86 Assembly Language Reference Manual

Packed Arithmetic Instructions (MMX)

The packed arithmetic instructions perform packed integer arithmetic on packed byte, word, and doubleword integers.

Table 3–22 Packed Arithmetic Instructions (MMX)


Solaris Mnemonic	Intel/AMD Mnemonic	Description
`paddb`	`PADDB`	add packed byte integers
`paddd`	`PADDD`	add packed doubleword integers
`paddsb`	`PADDSB`	add packed signed byte integers with signed saturation
`paddsw`	`PADDSW`	add packed signed word integers with signed saturation
`paddusb`	`PADDUSB`	add packed unsigned byte integers with unsigned saturation
`paddusw`	`PADDUSW`	add packed unsigned word integers with unsigned saturation
`paddw`	`PADDW`	add packed word integers
`pmaddwd`	`PMADDWD`	multiply and add packed word integers
`pmulhw`	`PMULHW`	multiply packed signed word integers and store high result
`pmullw`	`PMULLW`	multiply packed signed word integers and store low result
`psubb`	`PSUBB`	subtract packed byte integers
`psubd`	`PSUBD`	subtract packed doubleword integers
`psubsb`	`PSUBSB`	subtract packed signed byte integers with signed saturation
`psubsw`	`PSUBSW`	subtract packed signed word integers with signed saturation
`psubusb`	`PSUBUSB`	subtract packed unsigned byte integers with unsigned saturation
`psubusw`	`PSUBUSW`	subtract packed unsigned word integers with unsigned saturation
`psubw`	`PSUBW`	subtract packed word integers