rs6000.c (rs6000_split_vec_extract_var): On ISA 3.0/power9, add support to use the VEXTU{B,H,W}{L,R}X extract instructions.

[gcc]
2016-12-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_split_vec_extract_var): On ISA
	3.0/power9, add support to use the VEXTU{B,H,W}{L,R}X extract
	instructions.
	* config/rs6000/vsx.md (VSr2): Add IEEE 128-bit floating point
	type constraint registers.
	(VSr3): Likewise.
	(FL_CONV): New mode iterator for binary floating types that have a
	direct conversion from 64-bit integer to floating point.
	(vsx_extract_<mode>_p9): Add support for the ISA 3.0/power9
	VEXTU{B,H,W}{L,R}X extract instructions.
	(vsx_extract_<mode>_p9 splitter): Add splitter to load up the
	extract byte position into the GPR if we are using the
	VEXTU{B,H,W}{L,R}X extract instructions.
	(vsx_extract_<mode>_di_p9): Support extracts to GPRs.
	(vsx_extract_<mode>_store_p9): Support extracting to GPRs so that
	we can use reg+offset address instructions.
	(vsx_extract_<mode>_var): Support extracts to GPRs.
	(vsx_extract_<VSX_EXTRACT_I:mode>_<SDI:mode>_var): New combiner
	insn to combine vector extracts with zero_extend.
	(vsx_ext_<VSX_EXTRACT_I:VS_scalar>_fl_<FL_CONV:mode>): Optimize
	extracting a small integer vector element and converting it to a
	floating point type.
	(vsx_ext_<VSX_EXTRACT_I:VS_scalar>_ufl_<FL_CONV:mode>): Likewise.
	(UNSPEC_XXEXTRACTUW): New unspec.
	(UNSPEC_XXINSERTW): Likewise.
	(vextract4b): Add support for the vec_vextract4b built-in
	function.
	(vextract4b_internal): Likewise.
	(vinsert4b): Add support for the vec_insert4b built-in function.
	Include both a version that inserts element 1 from a V4SI object
	and one that inserts a DI object.
	(vinsert4b_internal): Likewise.
	(vinsert4b_di): Likewise.
	(vinsert4b_di_internal): Likewise.
	* config/rs6000/predicates.md (const_0_to_11_operand): New
	predicate, match 0..11.
	* config/rs6000/rs6000-builtin.def (BU_P9V_VSX_3): Set built-in
	type to ternary, not binary.
	(BU_P9V_64BIT_VSX_3): Likewise.
	(P9V_BUILTIN_VEXTRACT4B): Add support for vec_vinsert4b and
	vec_extract4b non-overloaded built-in functions.
	(P9V_BUILTIN_VINSERT4B): Likewise.
	(P9V_BUILTIN_VINSERT4B_DI): Likewise.
	(P9V_BUILTIN_VEC_VEXTULX): Move to section that adds 2 operand ISA
	3.0 built-in functions.
	(P9V_BUILTIN_VEC_VEXTURX): Likewise.
	(P9V_BUILTIN_VEC_VEXTRACT4B): Add support for overloaded
	vec_insert4b and vec_extract4 built-in functions.
	(P9V_BUILTIN_VEC_VINSERT4B): Likewise.
	* config/rs6000/rs6000-c.c (altivec_overloaded_builtins): Add
	overloaded support for vec_vinsert4b and vec_extract4b.
	* config/rs6000/rs6000.c (altivec_expand_builtin): Add checks for
	the vec_insert4b and vec_extract4b byte number being a constant in
	the range 0..11.
	* config/rs6000/altivec.h (vec_vinsert4b): Support vec_vinsert4b
	and vec_extract4b built-in functions.
	* doc/extend.doc (PowerPC VSX built-in functions): Document
	vec_insert4b and vec_extract4b.

[gcc/testsuite]
2016-12-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc/testsuite/gcc.target/powerpc/vec-extract.h: If DO_TRACE is
	defined, add tracing of the various extracts to stderr.  Add
	support for tests that convert the result to another type.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v2df.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v4sf.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v4si-df.c: Add new
	tests that do an extract and then convert the values double.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v4siu-df.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-df.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v16qi-df.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v8hiu-df.c: Likewise.
	* gcc/testsuite/gcc.target/powerpc/vec-extract-v8hi-df.c: Likewise.
	* gcc.target/powerpc/p9-extract-1.c: Update test to check for
	VEXTU{B,H,W}{L,R}X instructions being generated by default instead
	of VEXTRACTU{B,H} and XXEXTRACTUW.
	* gcc.target/powerpc/p9-extract-3.c: New test for combination of
	vec_extract and convert to floating point.
	* gcc.target/powerpc/p9-vinsert4b-1.c: New test for vec_vinsert4b
	and vec_extract4b.
	* gcc.target/powerpc/p9-vinsert4b-2.c: Likewise.

From-SVN: r243653