Did not factor out the codegen because it is short enough (1 or 2
instructions) and will unlikely be changed (for optimization reasons).

Bug: v8:11265
Change-Id: Ic5e5bc7642e80448bdaa6d130dfe7c12018eb481
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2683209
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72664}