The only sched models that for cpu's that support avx2
but not avx512 are: haswell, broadwell, skylake, zen1-3
For this tuple, measuring becomes problematic since there's a lot of spilling going on,
but apparently all these memory ops do not affect worst-case estimate at all here.
For load we have:
https://godbolt.org/z/5qGb9odP6 - for intels Block RThroughput: <=106.0; for ryzens, Block RThroughput: <=34.8
So pick cost of 106.
For store we have:
https://godbolt.org/z/KrWcv4Ph7 - for intels Block RThroughput: =58.0; for ryzens, Block RThroughput: <=20.5
So pick cost of 58.
I'm directly using the shuffling asm the llc produced,
without any manual fixups that may be needed
to ensure sequential execution.