This is a fixed version of change 5097, which had the problem that LoadFloatOperands tried to load the arguments from the stack.
Review URL: http://codereview.chromium.org/3040010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5103 ce2b1a6d-e550-0410-aec6-3dcde31c8c00