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Lowering Vector512() methods : comparison + shift #84942

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merged 4 commits into from
Apr 21, 2023
Merged

Lowering Vector512() methods : comparison + shift #84942

merged 4 commits into from
Apr 21, 2023

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DeepakRajendrakumaran
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@DeepakRajendrakumaran DeepakRajendrakumaran commented Apr 17, 2023 •
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Includes following

Comparison : LessThan(), LessThanOrEqual(), GreaterThan(), GreaterThanOrEqual() +corresponding *ANY(), *ALL() and ConditionalSelect()

Arithmetic : ShiftLeft, ShiftRight, ShiftRightArithmetic

Open : Some cases for ConditionalSelect() uses blend. Skipping for now. Have some other thoughts here anyway : using VPTERNLOG()??

@dotnet/avx512-contrib

@dotnet-issue-labeler dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 17, 2023
jnyrup
jnyrup reviewed Apr 17, 2023
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src/coreclr/jit/gentree.cpp Outdated Show resolved Hide resolved
@BruceForstall BruceForstall added the avx512 Related to the AVX-512 architecture label Apr 17, 2023
@DeepakRajendrakumaran DeepakRajendrakumaran marked this pull request as ready for review April 17, 2023 23:27
@DeepakRajendrakumaran
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@tannergooding @BruceForstall

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cc @dotnet/jit-contrib

This was referenced Apr 18, 2023
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There's some merge conflicts that need to be resolved, let me know if you need any assistance with them.

@DeepakRajendrakumaran
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There's some merge conflicts that need to be resolved, let me know if you need any assistance with them.

Have resolved them

@DeepakRajendrakumaran DeepakRajendrakumaran force-pushed the Deepak_comparison branch 3 times, most recently from ad69641 to 46b5933 Compare April 19, 2023 18:24
@DeepakRajendrakumaran
LessThan(), LessThanOrEqual(), GreaterThan(), GreaterThanOrEqual() + …
46b5933 
…corresponding *ANY(), *ALL() and ConditionaSelect()

ShiftLeft, ShiftRight, ShiftRightArithmetic
tannergooding
tannergooding reviewed Apr 19, 2023
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src/coreclr/jit/gentree.cpp
Comment on lines +20980 to +20985
// TODO-XArch-CQ: It's a non-trivial amount of work to support these
// for floating-point while only utilizing AVX. It would require, among
// other things, inverting the comparison and potentially support for a
// new Avx.TestNotZ intrinsic to ensure the codegen remains efficient.
assert(compIsaSupportedDebugOnly(InstructionSet_AVX2));
intrinsic = NI_Vector256_op_Equality;
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For other reviewers, this is just a copy/paste of an existing comment that used to be shared across the total of GE/GT/LE/LT

It's actually a lot easier for us to handle this today if we wanted to and is maybe a small/easy win we can do for .NET 8 (of course in a separate PR), so having the logic duplicated now will make doing that a bit simpler

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Manually triggered replay to try to get past infra issue: https://dev.azure.com/dnceng-public/public/_build/results?buildId=245191&view=results

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Manually triggered replay to try to get past infra issue: https://dev.azure.com/dnceng-public/public/_build/results?buildId=245191&view=results

Manually triggered replay to try to get past infra issue: https://dev.azure.com/dnceng-public/public/_build/results?buildId=245191&view=results

Thanks @BruceForstall .Looks like it passed on rerun. Do let me know if any other changes are needed or this is good to go.

kunalspathak
kunalspathak reviewed Apr 20, 2023
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src/coreclr/jit/gentree.cpp
intrinsic = NI_Vector512_op_Equality;
}
else if (simdSize == 32)
if (simdSize == 32)
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just curious, why we decided to check for 32 , then 64 and then (implicit) 16 or less? Is it because Vector256 is more common and should hit that condition first from TP perspective?

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Yep. Initially when we had throughput issues, this was one of the things we tried. Making check for 32 the first(being the most common case)

kunalspathak
kunalspathak approved these changes Apr 20, 2023
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A suggestion and a question. Feel free to do it in follow-up PR or including it with the next PR.

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tannergooding commented Apr 20, 2023 •
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Resolved conflict with multiply pr

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BruceForstall commented Apr 20, 2023 •
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Resolved conflict with #85070

@tannergooding tannergooding merged commit f8d1116 into dotnet:main Apr 21, 2023
@ghost ghost locked as resolved and limited conversation to collaborators May 21, 2023
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@jnyrup jnyrup jnyrup left review comments

@kunalspathak kunalspathak kunalspathak approved these changes

@tannergooding tannergooding tannergooding approved these changes

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@DeepakRajendrakumaran @BruceForstall @tannergooding @jnyrup @kunalspathak