mips3264 support

[Jeffrey Oldham]

Thanks for looking into the mips-sgi-irix6.5 gcc 3.1 bootstrap
failure.  I appreciate your work toward implementing mips32 and mips64
support in gcc, but the code still does not bootstrap.

By Wednesday, 19 Sep, 16:00 UT, will you please either fix the problem
or revert your patch(es) that caused the problem?

Thank you for your consideration,
Jeffrey D. Oldham
oldham@codesourcery.com