Start adding support for VIS 3.0 instructions.

Start adding support for VIS 3.0 instructions.

gcc/

	* config/sparc/sparc.opt (VIS3): New option.
	* doc/invoke.texi: Document it.
	* config/sparc/sparc.h: Force TARGET_VIS3 to zero if assembler is
	not capable of such instructions.
	* config/sparc/sparc-c.c (sparc_target_macros): Define __VIS__
	to 0x300 when TARGET_VIS3.
	* config/sparc/sparc-modes.def: Create 16-byte vector modes.
	* config/sparc/sparc.md (UNSPEC_CMASK8, UNSPEC_CMASK16, UNSPEC_CMASK32,
	UNSPEC_FCHKSM16, UNSPEC_PDISTN, UNSPC_FUCMP): New unspecs.
	(V64N8, VASS): New mode iterators.
	(vis3_shift, vis3_addsub_ss): New code iterators.
	(vbits, vconstr): New mode attributes.
	(vis3_shift_insn, vis3_addsub_ss_insn): New code attributes.
	(cmask8<P:mode>_vis, cmask16<P:mode>_vis, cmask32<P:mode>_vis,
	fchksm16_vis, <vis3_shift_insn><vbits>_vis, pdistn<mode>_vis,
	fmean16_vis, fpadd64_vis, fpsub64_vis, <vis3_addsub_ss_insn><vbits>_vis,
	fucmp<code>8<P:mode>_vis): New VIS 3.0 instruction patterns.
	* config/sparc/sparc.c (sparc_option_override): Set MASK_VIS3 by
	default when targetting capable cpus.  TARGET_VIS3 implies
	TARGET_VIS2 and TARGET_VIS, and clear them when TARGET_FPU is
	disabled.
	(sparc_vis_init_builtins): Emit new VIS 3.0 builtins.
	(sparc_fold_builtin): Do not eliminate cmask{8,16,32} when result
	is ignored.
	* config/sparc/visintrin.h (__vis_cmask8, __vis_cmask16,
	__vis_cmask32, __vis_fchksm16, __vis_fsll16, __vis_fslas16,
	__vis_fsrl16, __vis_fsra16, __vis_fsll32, __vis_fslas32,
	__vis_fsrl32, __vis_fsra32, __vis_pdistn, __vis_fmean16,
	__vis_fpadd64, __vis_fpsub64, __vis_fpadds16, __vis_fpadds16s,
	__vis_fpsubs16, __vis_fpsubs16s, __vis_fpadds32, __vis_fpadds32s,
	__vis_fpsubs32, __vis_fpsubs32s, __vis_fucmple8, __vis_fucmpne8,
	__vis_fucmpgt8, __vis_fucmpeq8): New VIS 3.0 interfaces.
	* doc/extend.texi: Document new VIS 3.0 builtins.

gcc/testsuite/

	* gcc.target/sparc/cmask.c: New test.
	* gcc.target/sparc/fpadds.c: New test.
	* gcc.target/sparc/fshift.c: New test.
	* gcc.target/sparc/fucmp.c: New test.
	* gcc.target/sparc/vis3misc.c: New test.

From-SVN: r179421