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[X86][Costmodel] Load/store i32/f32 Stride=2 VF=4 interleaving costs
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Authored by lebedev.ri on Sep 29 2021, 12:31 PM.

Details

Summary

The only sched models that for cpu's that support avx2
but not avx512 are: haswell, broadwell, skylake, zen1-3

For load we have:
https://godbolt.org/z/EM5Ean7bd - for intels Block RThroughput: =2.0; for ryzens, Block RThroughput: =1.0
So pick cost of 2.

For store we have:
https://godbolt.org/z/EM5Ean7bd - for intels Block RThroughput: =2.0; for ryzens, Block RThroughput: <=2.0
So pick cost of 2.

I'm directly using the shuffling asm the llc produced,
without any manual fixups that may be needed
to ensure sequential execution.

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