[PATCH] [MIPS] Add Octeon2 cpu support to GCC

[Andrew Pinski <andrew dot pinski at caviumnetworks dot com>]

Hi,
  This patch adds just octeon2 scheduling to GCC, it does not add
support for using the indexed based loads (which I am going to submit
separate).

OK? Bootstrapped and tested on mips64-linux-gnu (also tested with
-march=octeon2).

gcc/ChangeLog:
* config/mips/mips-cpus.def: Add Octeon2.
* config/mips/mips-tables.opt: Regenerate.
* config/mips/mips.md (define_attr "cpu"): Add Octeon2.
* config/mips/driver-native.c (host_detect_local_cpu): Support Octeon2 also.
* config/mips/octeon.md (octeon_arith): Add Octeon2.
(octeon_condmove): Likewise.
(octeon_load): Rename to ..
(octeon_load_o1): this.
(octeon_load_o2): New reserve.
(octeon_cop_o2): New reserve.
(octeon_store):  Match Octeon2 also.
(octeon_brj): Rename to ..
(octeon_brj_o1): this.
(octeon_brj_o2): New reserve.
(octeon_imul3): Rename to ...
(octeon_imul3_o1): this.
(octeon_imul3_o2): New reserve.
(octeon_imul): Rename to ...
(octeon_imul_o1): this.
(octeon_imul_o2): New reserve.
(octeon_mfhilo): Rename to ...
(octeon_mfhilo_o1): This.
(octeon_mfhilo_o2): New reserve.
(octeon_imadd): Rename to ...
(octeon_imadd_o1): this.
(octeon_imadd_o2): New reserve.
(octeon_idiv): Rename to ..
(octeon_idiv_o1): This.
(octeon_idiv_o2_si): New reserve.
(octeon_idiv_o2_di): Likewise.
(octeon_unknown): Match Octeon2 also.
* config/mips/mips.c (mips_rtx_cost_data): Add Octeon2 cost data.
(mips_issue_rate): Octeon2 can issue 2 at a time.
* config/mips/mips.h (TARGET_OCTEON): Match Octeon2 also.
(TARGET_OCTEON2): New define.
(TUNE_OCTEON): Match Octeon2 also.
(TUNE_OCTEON2): New defined.

testsuite/ChangeLog:
* gcc.target/mips/octeon2-pipe-1.c: New testcase.
* gcc.target/mips/octeon-pipe-1.c: New testcase.

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