operators.'

Port c129aa4d

Original commit message:
These macro operators represent a conditional eager deoptimization exit
without explicit branching, which greatly reduces overhead of both
scheduling and register allocation, and thereby greatly reduces overall
compilation time, esp. when there are a lot of eager deoptimization
exits.

BUG=
TEST=mjsunit/asm/embenchen/fasta

Review URL: https://codereview.chromium.org/1736653003

Cr-Commit-Position: refs/heads/master@{#34301}