Check that FPU TOP register is zero and clear all exceptions instead of using fninit, which causes performance regression on Windows.
Check that FPU TOP register is zero and clear all exceptions instead of using fninit,
which causes performance regression on Windows.

BUG=168370
R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11962015

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@13401 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh