Add support for more sparc VIS 3.0 instructions.

Add support for more sparc VIS 3.0 instructions.

gcc/

	* config/sparc/sparc.md (UNSPEC_FHADD, UNSPEC_FHSUB,
	UNSPEC_XMUL): New unspecs.
	(muldi3_v8plus): Use output_v8plus_mult.
	(*naddsf3, *nadddf3, *nmulsf3, *nmuldf3, *nmuldf3_extend):
	New VIS 3.0 combiner patterns.
	(fhaddsf_vis, fhadddf_vis, fhsubsf_vis, fhsubdf_vis,
	fnhaddsf_vis, fnhaddf_vis, umulxhi_vis, *umulxhi_sp64,
	umulxhi_v8plus, xmulx_vis, *xmulx_sp64, xmulx_v8plus,
	xmulxhi_vis, *xmulxhi_sp64, xmulxhi_v8plus): New VIS 3.0
	builtins patterns.
	* config/sparc/sparc.c (sparc_vis_init_builtins): Emit new
	builtins.
	(output_v8plus_mult): New function.
	* config/sparc/sparc-protos.h: Declare it.
	* config/sparc/visintrin.h (__vis_fhadds, __vis_fhaddd,
	__vis_fhsubs, __vis_fhsubd, __vis_fnhadds, __vis_fnhaddd,
	__vis_umulxhi, __vis_xmulx, __vis_xmulxhi): New intrinsics.
	* doc/extend.texi: Document new builtins.

gcc/testsuite/

	* gcc.target/sparc/fhalve.c: New test.
	* gcc.target/sparc/fnegop.c: New test.
	* gcc.target/sparc/xmul.c: New test.

From-SVN: r179535