bfin-modes.def: New file.

	* config/bfin/bfin-modes.def: New file.
	* config/bfin/bfin-protos.h: New file.
	* config/bfin/bfin.c: New file.
	* config/bfin/bfin.h: New file.
	* config/bfin/bfin.md: New file.
	* config/bfin/bfin.opt: New file.
	* config/bfin/crti.s: New file.
	* config/bfin/crtn.s: New file.
	* config/bfin/elf.h: New file.
	* config/bfin/lib1funcs.asm: New file.
	* config/bfin/predicates.md: New file.
	* config/bfin/t-bfin: New file.
	* config/bfin/t-bfin-elf: New file.
	* doc/extend.texi (exception_handler, kspisusp, nesting, nmi_handler):
	Document new attributes.
	(interrupt, interrupt_handler, saveall): Update documentation for
	these attributes.
	* doc/install.texi (Specific): Add entry for the Blackfin.
	* doc/invoke.texi (Blackfin Options): New section.
	* doc/md.texi (Blackfin family): New section to document constraints.
	* config.gcc: Add bfin*-* and bfin*-elf configurations.

From-SVN: r97622