Port ec8fbed7

Original Commit Message:

    These instructions were accepted into the proposal:
    https://github.com/WebAssembly/simd/pull/290

R=zhin@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I69bbe90ab3af30d7748332a7e99b7812c95f96b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2644939Reviewed-by: Junliang Yan <junyan@redhat.com>
Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72257}