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runtime: on arm64 use all of the hash seed on 32-bit hashes

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Even though we're hashing a 32-bit item, we can still use
all 64 bits of the seed.

Just a minor tweak I noticed, probably doesn't materially
change anything.

Change-Id: I744eef7577e83932abe1d1dc3af6bf2cd1010c51
Reviewed-on: https://go-review.googlesource.com/c/go/+/755781
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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khr@golang.org 2026-03-16 14:26:34 -07:00 • committed by Gopher Robot
parent 82fd4c4967
commit 8fe0c0eb63
1 changed files with 2 additions and 2 deletions
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4
src/runtime/asm_arm64.s
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@ -682,8 +682,8 @@ TEXT runtime·memhash32<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-24
VEOR V0.B16, V0.B16, V0.B16
VLD1 (R3), [V2.B16]
VLD1 (R0), V0.S[1]
VMOV R1, V0.S[0]
VLD1 (R0), V0.S[2]
VMOV R1, V0.D[0]
AESE V2.B16, V0.B16
AESMC V0.B16, V0.B16