Similar to the changes in the disassembly, break up simulator changes
into smaller functions.

This change only copy pastes implementation into various helper
function, and does not follow the decoding rules in the manual yet, it
is still using SpecialValue. Subsequent changes will clean this up.

Bug: v8:11074
Change-Id: Ic2905406e905fc3df01825047763d083aa0fbff4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2505248Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70906}