* config/mips/predicates.md (hilo_operand): New predicate.
	* config/mips/mips.md (<u>mulsidi3_64bit): Change it to a
	define_insn.  Correct !ISA_HAS_EXT_INS length from 24 to 28.  Move
	splitter part from here ...:
	(<u>mulsidi3_64bit splitter for !ISA_HAS_EXT_INS): ... to here.  Swap
	op0 and op4 to match the DINS case.
	(<u>mulsidi3_64bit splitter for ISA_HAS_EXT_INS): New splitter.

testsuite/
	* gcc.target/mips/mult-1.c: New test.

From-SVN: r153538