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

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Junyang Shao (Gerrit)

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Nov 11, 2025, 4:34:44 PM (yesterday) Nov 11

to goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, Go LUCI, David Chase, golang-co...@googlegroups.com

Junyang Shao submitted the change with unreviewed changes

Unreviewed changes

8 is the latest approved patch-set.
The change was submitted with unreviewed changes in the following files:

```
The name of the file: src/simd/internal/simd_test/simd_test.go
Insertions: 4, Deletions: 3.

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The name of the file: src/cmd/compile/internal/ssa/_gen/simdAMD64ops.go
Insertions: 1, Deletions: 1.

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```
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The name of the file: src/cmd/compile/internal/ssa/rewriteAMD64.go
Insertions: 5624, Deletions: 5624.

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```
The name of the file: src/simd/_gen/simdgen/gen_simdMachineOps.go
Insertions: 2, Deletions: 2.

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The name of the file: src/cmd/compile/internal/ssa/_gen/simdAMD64.rules
Insertions: 403, Deletions: 403.

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The name of the file: src/cmd/compile/internal/ssa/_gen/AMD64Ops.go
Insertions: 15, Deletions: 16.

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Change information

Commit message:

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

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 <drc...@google.com>

TryBot-Bypass: Junyang Shao <shaoj...@google.com>

Files:

M src/cmd/compile/internal/amd64/simdssa.go
M src/cmd/compile/internal/amd64/ssa.go
M src/cmd/compile/internal/ssa/_gen/AMD64Ops.go
M src/cmd/compile/internal/ssa/_gen/simdAMD64.rules
M src/cmd/compile/internal/ssa/_gen/simdAMD64ops.go
M src/cmd/compile/internal/ssa/opGen.go
M src/cmd/compile/internal/ssa/rewriteAMD64.go
M src/simd/_gen/simdgen/gen_simdMachineOps.go
M src/simd/_gen/simdgen/gen_simdTypes.go
M src/simd/_gen/simdgen/gen_simdrules.go
M src/simd/_gen/simdgen/gen_simdssa.go
M src/simd/_gen/simdgen/gen_utility.go
M src/simd/_gen/simdgen/ops/Moves/go.yaml
M src/simd/internal/simd_test/simd_test.go
M test/codegen/simd.go

Change size: XL

Delta: 15 files changed, 17367 insertions(+), 627 deletions(-)

Branch: refs/heads/dev.simd

Submit Requirements:

Code-Review: +2 by David Chase
TryBots-Pass: LUCI-TryBot-Result-1 by Go LUCI, TryBot-Bypass+1 by Junyang Shao

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