9b2e3b9a02
VPMOVMSKB, VMOVMSKPS, and VMOVMSKPD moves AVX1/2-style masks to integer registers, similar to VPMOV[BWDQ]2M (which moves to mask registers). The former is available on AVX1/2, the latter requires AVX512. So use the former if it is supported, i.e. for 128- and 256-bit vectors with 8-, 32-, and 64-bit elements (16-bit elements always require AVX512). Change-Id: I972195116617ed2faaf95cee5cd6b250e671496c Reviewed-on: https://go-review.googlesource.com/c/go/+/734060 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Junyang Shao <shaojunyang@google.com>
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