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[dev.simd] cmd/compile: add masked merging ops and optimizations

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This CL generates optimizations for masked variant of AVX512
instructions for patterns:

x.Op(y).Merge(z, mask) => OpMasked(z, x, y mask), where OpMasked is
resultInArg0.

Change-Id: Ife7ccc9ddbf76ae921a085bd6a42b965da9bc179
Reviewed-on: https://go-review.googlesource.com/c/go/+/718160
Reviewed-by: David Chase <drchase@google.com>
TryBot-Bypass: Junyang Shao <shaojunyang@google.com>
This commit is contained in:
Junyang Shao 2025-11-05 19:25:00 +00:00
parent 771a1dc216
commit 86b4fe31d9
15 changed files with 17367 additions and 627 deletions
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10
test/codegen/simd.go
View file

@ -67,3 +67,13 @@ func simdFeatureGuardedMaskOpt() simd.Int16x16 {
mask := simd.Mask16x16FromBits(5)
return x.Add(y).Masked(mask) // amd64:`VPAND\s.*$`
}
func simdMaskedMerge() simd.Int16x16 {
var x, y simd.Int16x16
if simd.HasAVX512() {
mask := simd.Mask16x16FromBits(5)
return x.Add(y).Merge(x, mask) // amd64:-`VPBLENDVB\s.*$`
}
mask := simd.Mask16x16FromBits(5)
return x.Add(y).Merge(x, mask) // amd64:`VPBLENDVB\s.*$`
}