Add new nds32 port, including machine description, libgcc, and documentation.
[gcc/ChangeLog]
* config.gcc (nds32*-*-*): Add nds32 target.
* config/nds32/nds32.c: New file.
* config/nds32/nds32.h: New file.
* config/nds32/nds32.md: New file.
* config/nds32/constants.md: New file.
* config/nds32/constraints.md: New file.
* config/nds32/iterators.md: New file.
* config/nds32/nds32-doubleword.md: New file.
* config/nds32/nds32-intrinsic.md: New file.
* config/nds32/nds32_intrinsic.h: New file.
* config/nds32/nds32-modes.def: New file.
* config/nds32/nds32-multiple.md: New file.
* config/nds32/nds32.opt: New file.
* config/nds32/nds32-opts.h: New file.
* config/nds32/nds32-protos.h: New file.
* config/nds32/nds32-peephole2.md: New file.
* config/nds32/pipelines.md: New file.
* config/nds32/predicates.md: New file.
* config/nds32/t-mlibs: New file.
* common/config/nds32: New directory and files.
* doc/invoke.texi (NDS32 options): Document nds32 specific options.
* doc/md.texi (NDS32 family): Document nds32 specific constraints.
* doc/install.texi (Cross-Compiler-Specific Options): Document
--with-nds32-lib for nds32 target.
* doc/extend.texi (Function Attributes, Target Builtins): Document
nds32 specific attributes.
[libgcc/ChangeLog]
* config.host (nds32*-elf*): Add nds32 target.
* config/nds32 : New directory and files.
[contrib/ChangeLog]
* config-list.mk (nds32le-elf, nds32be-elf): Add nds32 target.
Co-Authored-By: Shiva Chen <shiva0217@gmail.com>
From-SVN: r204269
9304f87611