Correctly convert micro-sign to its upper case.

R=dcarney@chromium.org
BUG=355485
LOG=N

Review URL: https://codereview.chromium.org/209323007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20197 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ARM64: Use a double register to break cycle involving double values.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/208183002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20198 ce2b1a6d-e550-0410-aec6-3dcde31c8c00