[Bug target/19161] No emms or femms emitted between MMX and FP instructions

[ubizjak at gmail dot com]

------- Comment #23 from ubizjak at gmail dot com  2008-03-19 10:38 -------
As stated in comment #16 and #17, the LCM infrastructure doesn't support mode
switching in the way that would be usable for emms. Additionally, there are
MANY problems expected when sharing x87 and MMX registers (i.e. handling of
uninitialized x87 registers at the beginning of the function - this is the
reason we don't implement x87 register passing ABI).

Automatic MMX vectorization is not exactly a much usable feature nowadays (we
have SSE that works quite well here). Due to recent changes in MMX register
allocation area, excellent code is produced using MMX intrinsics, I'm closing
this bug as WONTFIX.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19161