gcc/

gcc/
	* config/mips/mips.h (ISA_HAS_WSBH): Define.
	* config/mips/mips.md (UNSPEC_WSBH, UNSPEC_DSBH, UNSPEC_DSHD): New
	constants.
	(bswaphi2, bswapsi2, bswapdi2, wsbh, dsbh, dshd): New patterns.

gcc/testsuite/
	* gcc.target/mips/bswap-1.c, gcc.target/mips/bswap-2.c,
	gcc.target/mips/bswap-3.c, gcc.target/mips/bswap-4.c,
	gcc.target/mips/bswap-5.c, gcc.target/mips/bswap-6.c: New tests.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203870 138bc75d-0d04-0410-961f-82ee72b054a4