In x64 we can use the macro ASSEMBLE_MOVX.

In Arm64, we force the use of registers.

B

Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng,v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:8977
Change-Id: I98c6a12d28acca43a38a77dc3ee7af126edb64fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1545889
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60518}