x86: Support Intel AVX512 BF16

x86: Support Intel AVX512 BF16

Add assembler and disassembler support Intel AVX512 BF16:

https://software.intel.com/en-us/download/intel-architecture-instruction-set-extensions-programming-reference

gas/

2019-04-05  Xuepeng Guo  <xuepeng.guo@intel.com>

	* config/tc-i386.c (cpu_arch): Add .avx512_bf16.
	(cpu_noarch): Add noavx512_bf16.
	* doc/c-i386.texi: Document avx512_bf16.
	* testsuite/gas/i386/avx512_bf16.d: New file.
	* testsuite/gas/i386/avx512_bf16.s: Likewise.
	* testsuite/gas/i386/avx512_bf16_vl-inval.l: Likewise.
	* testsuite/gas/i386/avx512_bf16_vl-inval.s: Likewise.
	* testsuite/gas/i386/avx512_bf16_vl.d: Likewise.
	* testsuite/gas/i386/avx512_bf16_vl.s: Likewise.
	* testsuite/gas/i386/x86-64-avx512_bf16.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512_bf16.s: Likewise.
	* testsuite/gas/i386/x86-64-avx512_bf16_vl-inval.l: Likesie.
	* testsuite/gas/i386/x86-64-avx512_bf16_vl-inval.s: Likewise.
	* testsuite/gas/i386/x86-64-avx512_bf16_vl.d: Likewise.
	* testsuite/gas/i386/x86-64-avx512_bf16_vl.s: Likewise.
	* testsuite/gas/i386/i386.exp: Add BF16 related tests.

opcodes/

2019-04-05  Xuepeng Guo  <xuepeng.guo@intel.com>

	* i386-dis-evex.h (evex_table): Updated to support BF16
	instructions.
	* i386-dis.c (enum): Add EVEX_W_0F3852_P_1, EVEX_W_0F3872_P_1
	and EVEX_W_0F3872_P_3.
	* i386-gen.c (cpu_flag_init): Add CPU_AVX512_BF16_FLAGS.
	(cpu_flags): Add bitfield for CpuAVX512_BF16.
	* i386-opc.h (enum): Add CpuAVX512_BF16.
	(i386_cpu_flags): Add bitfield for cpuavx512_bf16.
	* i386-opc.tbl: Add AVX512 BF16 instructions.
	* i386-init.h: Regenerated.
	* i386-tbl.h: Likewise.