x64 Assembly and C++ Tutorial 44: MMX Packing and Unpacking

It's been a while. I want this stuff to be easy to understand and to make so I'm trying slides.

In this tutorial we're looking at nine packing/unpacking instructions available in MMX. The mnemonics to these instructions make them seem like data conversion instructions. Although they're good at data conversion they are also good at other things like moving data and broadcasting (both of which we'll look at in the tute).

These instructions can come accross as confusing but hopefully with the animations it will all be easy.

Category:

Education

Tags:

• x64
• assembly
• asm
• tutorial
• mmx
• simd
• packing
• unpacking
• packsswb
• packssdw
• packuswb
• punpcklbw
• punpcklwd
• punpckldq
• punpckhbw
• punpckhwd
• punpckhdq
• broadcast
• instructions