Port 66870070

Original Commit Message:

    Replace bitwise arithmetic with conditional move / select instructions
    on ia32, x64, Arm and Arm64. In local tests this improves --noopt Ignition
    performance by between 2-5%.

R=rmcilroy@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:798964
LOG=N

Change-Id: I3cb65bdf2cf48df30e97b8a12966636fa6aca5ec
Reviewed-on: https://chromium-review.googlesource.com/939852
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#51658}