(*): Make all fp patterns conditional on TARGET_FPU.

(movtf, movdf, movsf): Add !TARGET_FPU versions.
(sfmode return): Add pattern for when !TARGET_FPU.
(movsi+2, movsf+1): Use %@ instead of %%fp.
(mulsidi3, umulsidi3): Rewrite, to avoid extending constants.

From-SVN: r3195