Add support for AVX512VL. Add AVX512VL versions of AVX512F instructions.

Add support for AVX512VL. Add AVX512VL versions of AVX512F instructions.

gas/

	* config/tc-i386.c (cpu_arch): Add .avx512vl, CPU_AVX512VL_FLAGS.
	(build_vex_prefix): Don't abort on VEX.W.
	(check_VecOperands): Support BROADCAST_1TO4 and BROADCAST_1TO2.
	(check_VecOperations): Ditto.
	* doc/c-i386.texi: Document avx512vl/.avx512vl.

gas/testsuite/

	* gas/i386/avx512f_vl-intel.d: New.
	* gas/i386/avx512f_vl-opts-intel.d: New.
	* gas/i386/avx512f_vl-opts.d: New.
	* gas/i386/avx512f_vl-opts.s: New.
	* gas/i386/avx512f_vl-wig.s: New.
	* gas/i386/avx512f_vl-wig1-intel.d: New.
	* gas/i386/avx512f_vl-wig1.d: New.
	* gas/i386/avx512f_vl.d: New.
	* gas/i386/avx512f_vl.s: New.
	* gas/i386/i386.exp: Run new AVX-512 tests.
	* gas/i386/x86-64-avx512f_vl-intel.d: New.
	* gas/i386/x86-64-avx512f_vl-opts-intel.d: New.
	* gas/i386/x86-64-avx512f_vl-opts.d: New.
	* gas/i386/x86-64-avx512f_vl-opts.s: New.
	* gas/i386/x86-64-avx512f_vl-wig.s: New.
	* gas/i386/x86-64-avx512f_vl-wig1-intel.d: New.
	* gas/i386/x86-64-avx512f_vl-wig1.d: New.
	* gas/i386/x86-64-avx512f_vl.d: New.
	* gas/i386/x86-64-avx512f_vl.s: New.

opcodes/

	* i386-dis.c (intel_operand_size): Support 128/256 length in
	vex_vsib_q_w_dq_mode.
	(OP_E_memory): Add ymmq_mode handling, handle new broadcast.
	* i386-gen.c (cpu_flag_init): Add CPU_AVX512VL_FLAGS.
	(cpu_flags): Add CpuAVX512VL.
	* i386-init.h: Regenerated.
	* i386-opc.h (CpuAVX512VL): New.
	(i386_cpu_flags): Add cpuavx512vl.
	(BROADCAST_1TO4, BROADCAST_1TO2): Define.
	* i386-opc.tbl: Add AVX512VL instructions.
	* i386-tbl.h: Regenerate.