Enable support for bfloat16 which will be in Future Cooper Lake.

Enable support for bfloat16 which will be in Future Cooper Lake.

There are 3 instructions for AVX512BF16: VCVTNE2PS2BF16, VCVTNEPS2BF16 and
DPBF16PS instructions, which are Vector Neural Network Instructions
supporting:

- VCVTNE2PS2BF16: Convert Two Packed Single Data to One Packed BF16 Data.
- VCVTNEPS2BF16: Convert Packed Single Data to Packed BF16 Data.
- VDPBF16PS: Dot Product of BF16 Pairs Accumulated into Packed Single Precision.

2019-05-07  Wei Xiao  <wei3.xiao@intel.com>

	* common/config/i386/i386-common.c (OPTION_MASK_ISA_AVX512BF16_SET
	OPTION_MASK_ISA_AVX512BF16_UNSET, OPTION_MASK_ISA2_AVX512BW_UNSET): New.
	(OPTION_MASK_ISA2_AVX512F_UNSET): Add OPTION_MASK_ISA_AVX512BF16_UNSET.
	(ix86_handle_option): Handle -mavx512bf16.
	* config.gcc: Add avx512bf16vlintrin.h and avx512bf16intrin.h
	to extra_headers.
	* config/i386/avx512bf16vlintrin.h: New.
	* config/i386/avx512bf16intrin.h: New.
	* config/i386/cpuid.h (bit_AVX512BF16): New.
	* config/i386/driver-i386.c (host_detect_local_cpu): Detect BF16.
	* config/i386/i386-builtin-types.def: Add new types.
	* config/i386/i386-builtin.def: Add new builtins.
	* config/i386/i386-c.c (ix86_target_macros_internal): Define
	__AVX512BF16__.
	* config/i386/i386-option.c (ix86_target_string): Add -mavx512bf16.
	(ix86_option_override_internal): Handle BF16.
	(ix86_valid_target_attribute_inner_p): Ditto.
	* config/i386/i386-expand.c (ix86_expand_args_builtin): Ditto.
	* config/i386/i386-builtin.c (enum processor_features): Add
	F_AVX512BF16.
	(static const _isa_names_table isa_names_table): Ditto.
	* config/i386/i386.h (TARGET_AVX512BF16, TARGET_AVX512BF16_P): New.
	(PTA_AVX512BF16): Ditto.
	* config/i386/i386.opt: Add -mavx512bf16.
	* config/i386/immintrin.h: Include avx512bf16intrin.h
	and avx512bf16vlintrin.h.
	* config/i386/sse.md (avx512f_cvtne2ps2bf16_<mode><mask_name>,
	avx512f_cvtneps2bf16_<mode><mask_name>,
	avx512f_dpbf16ps_<mode><mask_half_name>): New define_insn patterns.
	* config/i386/subst.md (mask_half): Add new subst.
	* doc/invoke.texi: Document -mavx512bf16.

2019-05-07  Wei Xiao  <wei3.xiao@intel.com>

	* gcc.target/i386/avx512bf16-vcvtne2ps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16-vcvtneps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16-vdpbf16ps-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vcvtne2ps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vcvtneps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vdpbf16ps-1.c: New test.
	* gcc.target/i386/builtin_target.c: Handle avx512bf16.
	* gcc.target/i386/sse-12.c: Add -mavx512bf16.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.
	* g++.dg/other/i386-2.C: Ditto.
	* g++.dg/other/i386-3.C: Ditto.

2019-05-07  Hongtao Liu  <hongtao.liu@intel.com>

	* config/i386/cpuinfo.c (get_available_features): Detect BF16.
	* config/i386/cpuinfo.h (enum processor_features): Add
	FEATURE_AVX512BF16.

From-SVN: r271006