3.13.2 Conversion Instructions (MMX)
The conversion instructions pack
and unpack bytes, words, and doublewords.
Table 3-31 Conversion Instructions (MMX)
| | | |
|---|
|
| PACKSSDW
| pack doublewords into words with signed saturation
|
|
|
| PACKSSWB
| pack words into bytes with signed saturation
|
|
|
| PACKUSWB
| pack words into bytes with unsigned saturation
|
|
|
| PUNPCKHBW
| unpack high-order bytes
|
|
|
| PUNPCKHDQ
| unpack high-order doublewords
|
|
|
| PUNPCKHWD
| unpack high-order words
|
|
|
| PUNPCKLBW
| unpack low-order bytes
|
|
|
| PUNPCKLDQ
| unpack low-order doublewords
|
|
|
| PUNPCKLWD
| unpack low-order words
|
|
|