TestBit sets cr0 therefore need to pass that to the
branch instruction.
This got exposed with testcase added in CL
https://codereview.chromium.org/2497573003/

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2495853003
Cr-Commit-Position: refs/heads/master@{#40948}