[PATCH v3/MIPS] Split Loongson MultiMedia extensions Instructions (MMI) from loongson2f/3a

[Paul Hua]

Hi Maciej:

 The followings are the change description.

MIPS/GAS: Split Loongson MultiMedia extensions Instructions (MMI) from
loongson2f/3a.

The MMI instructions set has been implemented in many Loongson
processors.  There are a lot of software has optimized with MMI.  This
patch splits MMI from loongson2f/3a, and add a -mmmi option for MMI
instructions.

Paul Hua
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2018-07-14  Chenghua Xu  <paul.hua.gm@gmail.com>

bfd/
	* elfxx-mips.c (print_mips_ases): Add MMI extension.
binutils/
	* readelf.c (print_mips_ases): Add MMI extension.
gas/
	* NEWS: Mention MultiMedia extensions Instructions (MMI) support.
	* config/tc-mips.c (options): Add OPTION_MMI and OPTION_NO_MMI.
	(md_longopts): Likewise.
	(mips_ases): Define availability for MMI.
	(mips_convert_ase_flags): Map ASE_MMI to AFL_ASE_MMI.
	(mips_cpu_info_table): Add ASE_MMI for loongson2f/3a.
	(md_show_usage): Add help for -mmmi and -mno-mmi.
	* doc/as.texi: Document -mmmi, -mno-mmi.
	* doc/c-mips.texi: Document -mmmi, -mno-mmi, .set mmi and
	.set nommi.
	* testsuite/gas/mips/loongson-2f.d: Move mmi test to ...
	* testsuite/gas/mips/loongson-2f-mmi.d: Here.
	* testsuite/gas/mips/loongson-2f.s: Move mmi test to ...
	* testsuite/gas/mips/loongson-2f-mmi.s: Here.
	* testsuite/gas/mips/loongson-3a.d: Move mmi test to ...
	* testsuite/gas/mips/loongson-3a-mmi.d: Here.
	* testsuite/gas/mips/loongson-3a.s: Move mmi test to ...
	* testsuite/gas/mips/loongson-3a-mmi.s: Here.
	* testsuite/gas/mips/mips.exp: Run loongson-2f-mmi and
	loongson-3a-mmi tests.
include/
	* elf/mips.h (AFL_ASE_MMI): New macro.
	(AFL_ASE_MASK): Update to include AFL_ASE_MMI.
	* opcode/mips.h (ASE_MMI): New macro.
opcodes/
	* mips-dis.c (mips_arch_choices): Add MMI to loongson2f and
	loongson3a descriptors.
	(parse_mips_ase_option): Handle -mmmi option.
	(print_mips_disassembler_options): Document -mmmi.
	* mips-opc.c (LMMI): New macro.
	(mips_opcodes): Replace IL2F|IL3A marking with LMMI for MMI
	instructions.

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