mips.h (ISA_HAS_CINS): New macro.

	* config/mips/mips.h (ISA_HAS_CINS): New macro.
	* config/mips/mips-protos.h (mask_low_and_shift_p,
	mask_low_and_shift_len): Declare.
	* config/mips/mips.c (mask_low_and_shift_p,
	mask_low_and_shift_len): New functions.
	(mips_print_operand): Handle new operand prefix "m".
	* config/mips/mips.md (*cins<mode>): New pattern.

testsuite/
	* gcc.target/mips/octeon-cins-1.c: New test.
	* gcc.target/mips/octeon-cins-2.c: New test.

From-SVN: r140008