[PATCH 3/6] MIPS/GAS: Add Loongson EXT2 Instructions support.

[Nick Clifton]

Hi Paul,

> 2018-08-04  Chenghua Xu  <paul.hua.gm@gmail.com>
> 
> bfd/
>         * elfxx-mips.c (print_mips_ases): Add Loongson EXT2 extension.
> 
> binutils/
>         * readelf.c (print_mips_ases): Add Loongson EXT2 extension.
> 
> gas/
>         * NEWS: Mention Loongson EXTensions R2 (EXT2) support.
>         * config/tc-mips.c (options): Add OPTION_LOONGSON_EXT2 and
>         OPTION_NO_LOONGSON_EXT2.
>         (md_longopts): Likewise.
>         (mips_ases): Define availability for EXT.
>         (mips_convert_ase_flags): Map ASE_LOONGSON_EXT2 to
>         AFL_ASE_LOONGSON_EXT2.
>         (md_show_usage): Add help for -mloongson-ext2 and
>         -mno-loongson-ext2.
>         * doc/as.texi: Document -mloongson-ext2, -mno-loongson-ext2.
>         * doc/c-mips.texi: Document -mloongson-ext2, -mno-loongson-ext2,
>         .set loongson-ext2 and .set noloongson-ext2.
>         * testsuite/gas/mips/loongson-ext2.d: New test.
>         * testsuite/gas/mips/loongson-ext2.s: New test.
>         * testsuite/gas/mips/mips.exp: Run loongson-ext2 test.
> 
> include/
>         * elf/mips.h (AFL_ASE_LOONGSON_EXT2): New macro.
>         (AFL_ASE_MASK): Update to include AFL_ASE_LOONGSON_EXT2.
>         * opcode/mips.h (ASE_LOONGSON_EXT2): New macro.
> 
> opcodes/
>         * mips-dis.c (parse_mips_ase_option): Handle -M loongson-ext
>         option.
>         (print_mips_disassembler_options): Document -M loongson-ext.
>         * mips-opc.c (LEXT2): New macro.
>         (mips_opcodes): Add cto, ctz, dcto, dctz instructions.

Approved - please apply.

Cheers
  Nick