[go/dev.simd] [dev.simd] simd: route HiToLo through Float64x2 and fix codegen tests

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David Chase (Gerrit)

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Jun 8, 2026, 2:17:34 PMJun 8

to Alexander Musman, goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, golang...@luci-project-accounts.iam.gserviceaccount.com, Cherry Mui, Arseny Samoylov, Junyang Shao, golang-co...@googlegroups.com

David Chase submitted the change

Change information

Commit message:

[dev.simd] simd: route HiToLo through Float64x2 and fix codegen tests

Route HiToLo through Float64x2.SetElem/GetElem instead of Uint64x2
to avoid a round-trip through a GP register.

Update simd_arm64.go codegen test for current API.

Updates #79899

Change-Id: I3d98bd137474a5188509e5ee365c0d9af386e32c

Reviewed-on: https://go-review.googlesource.com/c/go/+/787302

Reviewed-by: David Chase <drc...@google.com>

Reviewed-by: Arseny Samoylov <samoylo...@gmail.com>

Reviewed-by: Cherry Mui <cher...@google.com>

LUCI-TryBot-Result: golang...@luci-project-accounts.iam.gserviceaccount.com <golang...@luci-project-accounts.iam.gserviceaccount.com>

Files:

M src/simd/archsimd/_gen/tmplgen/main.go
M src/simd/archsimd/other_gen_arm64.go
M test/codegen/simd_arm64.go

Change size: M

Delta: 3 files changed, 45 insertions(+), 37 deletions(-)

Branch: refs/heads/dev.simd

Submit Requirements:

Code-Review: +2 by David Chase, +1 by Cherry Mui, +1 by Arseny Samoylov
TryBots-Pass: LUCI-TryBot-Result+1 by golang...@luci-project-accounts.iam.gserviceaccount.com

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