(cpu attribute): Add r8000.
(umaddi+1, ..., umadddi+8): Add pattern for multiply accumulate.
(movdi): Legitimize addresses, just like movsi does.
(loadgp): New pattern for 64 bit ABI.
(shift patterns): Use INTVAL instead of XINT for constants.
(jump, tablejump_interal[12]): Add 64 bit ABI support.
(movsicc-8, ..., movsicc): Add patterns for conditional moves.

From-SVN: r8864