- Use IsInRange
- Convert scale to index using >>1 which works for 1, 2, 4
- Use mask to check Reads/Writes accumulator

Change-Id: Iaeb2236a2d179dc70b62fa599c08984800170336
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1541039
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60595}