[v3,00/12] Add LoongArch support.

  The LoongArch architecture (LoongArch) is an Instruction Set
Architecture (ISA) that has a Reduced Instruction Set Computer (RISC)
style.
The documents are on
https://loongson.github.io/LoongArch-Documentation/README-EN.html

The ELF ABI Documents are on:
https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html

The binutils has been merged into trunk:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=560b3fe208255ae909b4b1c88ba9c28b09043307

Note: We split -mabi= into -mabi=lp64d/f/s, the new options not support by upstream binutils yet, 
this GCC port requires the following patch applied to binutils to build.
https://github.com/loongson/binutils-gdb/commit/aacb0bf860f02aa5a7dcb76dd0e392bf871c7586
(will be submitted to upstream after gcc side comfirmed)


changelog:

v1 -> v2
1. Split patch set.
2. Change some code style.
3. Add -mabi=lp64d/f/s options.
4. Change GLIBC_DYNAMIC_LINKER_LP64 name.

v2 -> v3
1. Change some code style.
2. Bug fix.

We will donate LoongArch machine to Cfarm for testing.


*** BLURB HERE ***

chenglulu (12):
  LoongArch Port: gcc build
  LoongArch Port: Regenerate gcc/configure.
  LoongArch Port: Machine Decsription files.
  LoongArch Port: Machine description C files and .h files.
  LoongArch Port: Builtin functions.
  LoongArch Port: Builtin macros.
  LoongArch Port: libgcc
  LoongArch Port: Regenerate libgcc/configure.
  LoongArch Port: libgomp
  LoongArch Port: gcc/testsuite
  LoongArch Port: Regenerate configure
  LoongArch Port: Add doc.

 config/picflag.m4                             |    3 +
 configure                                     |   10 +-
 configure.ac                                  |   10 +-
 contrib/config-list.mk                        |    5 +-
 .../config/loongarch/loongarch-common.c       |   63 +
 gcc/config.gcc                                |  400 +-
 gcc/config/host-linux.c                       |    2 +
 gcc/config/loongarch/constraints.md           |  212 +
 gcc/config/loongarch/generic.md               |  132 +
 gcc/config/loongarch/genopts/genstr.sh        |   91 +
 .../loongarch/genopts/loongarch-strings       |   58 +
 gcc/config/loongarch/genopts/loongarch.opt.in |  189 +
 gcc/config/loongarch/gnu-user.h               |   78 +
 gcc/config/loongarch/la464.md                 |  132 +
 gcc/config/loongarch/larchintrin.h            |  413 ++
 gcc/config/loongarch/linux.h                  |   48 +
 gcc/config/loongarch/loongarch-builtins.c     |  511 ++
 gcc/config/loongarch/loongarch-c.c            |  136 +
 gcc/config/loongarch/loongarch-cpu.c          |  206 +
 gcc/config/loongarch/loongarch-cpu.h          |   30 +
 gcc/config/loongarch/loongarch-def.c          |  164 +
 gcc/config/loongarch/loongarch-def.h          |  151 +
 gcc/config/loongarch/loongarch-driver.c       |  187 +
 gcc/config/loongarch/loongarch-driver.h       |   60 +
 gcc/config/loongarch/loongarch-ftypes.def     |   95 +
 gcc/config/loongarch/loongarch-modes.def      |   35 +
 gcc/config/loongarch/loongarch-opts.c         |  582 ++
 gcc/config/loongarch/loongarch-opts.h         |   86 +
 gcc/config/loongarch/loongarch-protos.h       |  244 +
 gcc/config/loongarch/loongarch-str.h          |   57 +
 gcc/config/loongarch/loongarch-tune.h         |   72 +
 gcc/config/loongarch/loongarch.c              | 6472 +++++++++++++++++
 gcc/config/loongarch/loongarch.h              | 1291 ++++
 gcc/config/loongarch/loongarch.md             | 3829 ++++++++++
 gcc/config/loongarch/loongarch.opt            |  189 +
 gcc/config/loongarch/predicates.md            |  553 ++
 gcc/config/loongarch/sync.md                  |  574 ++
 gcc/config/loongarch/t-linux                  |   53 +
 gcc/config/loongarch/t-loongarch              |   59 +
 gcc/configure                                 |   63 +-
 gcc/configure.ac                              |   33 +-
 gcc/doc/install.texi                          |   47 +-
 gcc/doc/invoke.texi                           |  201 +
 gcc/doc/md.texi                               |   55 +
 gcc/testsuite/g++.dg/cpp0x/constexpr-rom.C    |    2 +-
 gcc/testsuite/g++.old-deja/g++.abi/ptrmem.C   |    2 +-
 gcc/testsuite/g++.old-deja/g++.pt/ptrmem6.C   |    2 +-
 gcc/testsuite/gcc.dg/20020312-2.c             |    2 +
 gcc/testsuite/gcc.dg/loop-8.c                 |    2 +-
 .../torture/stackalign/builtin-apply-2.c      |    2 +-
 gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c     |    2 +-
 .../gcc.target/loongarch/loongarch.exp        |   40 +
 .../gcc.target/loongarch/tst-asm-const.c      |   16 +
 gcc/testsuite/go.test/go-test.exp             |    3 +
 gcc/testsuite/lib/target-supports.exp         |   14 +
 libgcc/config.host                            |   28 +-
 libgcc/config/loongarch/crtfastmath.c         |   52 +
 libgcc/config/loongarch/crti.S                |   43 +
 libgcc/config/loongarch/crtn.S                |   39 +
 libgcc/config/loongarch/lib2funcs.c           |    0
 libgcc/config/loongarch/linux-unwind.h        |   80 +
 libgcc/config/loongarch/sfp-machine.h         |  152 +
 libgcc/config/loongarch/t-crtstuff            |    2 +
 libgcc/config/loongarch/t-elf                 |    3 +
 libgcc/config/loongarch/t-loongarch           |    9 +
 libgcc/config/loongarch/t-loongarch64         |    1 +
 libgcc/config/loongarch/t-softfp-tf           |    3 +
 libgcc/configure                              |    2 +-
 libgcc/configure.ac                           |    2 +-
 libgomp/configure.tgt                         |    4 +
 70 files changed, 18360 insertions(+), 28 deletions(-)
 create mode 100644 gcc/common/config/loongarch/loongarch-common.c
 create mode 100644 gcc/config/loongarch/constraints.md
 create mode 100644 gcc/config/loongarch/generic.md
 create mode 100755 gcc/config/loongarch/genopts/genstr.sh
 create mode 100644 gcc/config/loongarch/genopts/loongarch-strings
 create mode 100644 gcc/config/loongarch/genopts/loongarch.opt.in
 create mode 100644 gcc/config/loongarch/gnu-user.h
 create mode 100644 gcc/config/loongarch/la464.md
 create mode 100644 gcc/config/loongarch/larchintrin.h
 create mode 100644 gcc/config/loongarch/linux.h
 create mode 100644 gcc/config/loongarch/loongarch-builtins.c
 create mode 100644 gcc/config/loongarch/loongarch-c.c
 create mode 100644 gcc/config/loongarch/loongarch-cpu.c
 create mode 100644 gcc/config/loongarch/loongarch-cpu.h
 create mode 100644 gcc/config/loongarch/loongarch-def.c
 create mode 100644 gcc/config/loongarch/loongarch-def.h
 create mode 100644 gcc/config/loongarch/loongarch-driver.c
 create mode 100644 gcc/config/loongarch/loongarch-driver.h
 create mode 100644 gcc/config/loongarch/loongarch-ftypes.def
 create mode 100644 gcc/config/loongarch/loongarch-modes.def
 create mode 100644 gcc/config/loongarch/loongarch-opts.c
 create mode 100644 gcc/config/loongarch/loongarch-opts.h
 create mode 100644 gcc/config/loongarch/loongarch-protos.h
 create mode 100644 gcc/config/loongarch/loongarch-str.h
 create mode 100644 gcc/config/loongarch/loongarch-tune.h
 create mode 100644 gcc/config/loongarch/loongarch.c
 create mode 100644 gcc/config/loongarch/loongarch.h
 create mode 100644 gcc/config/loongarch/loongarch.md
 create mode 100644 gcc/config/loongarch/loongarch.opt
 create mode 100644 gcc/config/loongarch/predicates.md
 create mode 100644 gcc/config/loongarch/sync.md
 create mode 100644 gcc/config/loongarch/t-linux
 create mode 100644 gcc/config/loongarch/t-loongarch
 create mode 100644 gcc/testsuite/gcc.target/loongarch/loongarch.exp
 create mode 100644 gcc/testsuite/gcc.target/loongarch/tst-asm-const.c
 create mode 100644 libgcc/config/loongarch/crtfastmath.c
 create mode 100644 libgcc/config/loongarch/crti.S
 create mode 100644 libgcc/config/loongarch/crtn.S
 create mode 100644 libgcc/config/loongarch/lib2funcs.c
 create mode 100644 libgcc/config/loongarch/linux-unwind.h
 create mode 100644 libgcc/config/loongarch/sfp-machine.h
 create mode 100644 libgcc/config/loongarch/t-crtstuff
 create mode 100644 libgcc/config/loongarch/t-elf
 create mode 100644 libgcc/config/loongarch/t-loongarch
 create mode 100644 libgcc/config/loongarch/t-loongarch64
 create mode 100644 libgcc/config/loongarch/t-softfp-tf