2 ms·
> Instruction density is very important especially since caches are big and consume a lot of power too. Which hurts x86 a lot, because x86-64 is very space ine
by pcwalton 8y ago
> Instruction density is very important especially since caches are big and consume a lot of power too.
Which hurts x86 a lot, because x86-64 is very space inefficient for a variable length ISA. The REX prefixes add up to make x86-64 just as space-inefficient as AArch64.