[Bug target/21981] [4.0 only] __m64 return value should be returned in %mm0

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|__m64 return value should   |[4.0 only] __m64 return
                   |be returned in %mm0         |value should  be returned in
                   |                            |%mm0
   Target Milestone|---                         |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21981