This instruction has been merged into the proposal:
https://github.com/WebAssembly/simd/pull/365

Bug: v8:10971
Change-Id: I4dcad343a99271e1af4a48497e9f4ecc20785dcf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2632011Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72177}