Missing AVX512_FP16 detection

[damageboy]

Unless I'm throughly wrong here, cpu_features seems to be missing detection of AVX512_FP16?

For example, the intel docs for AVX512_FP16 state that:

From: https://www.sandpile.org/x86/ref_docs.htm

Yes, the current code-base does not look for CPUID.(7.0).EDX[23] at all:

cpu_features/src/impl_x86__base_implementation.inl

Lines 348 to 368 in b69591a

	if (os_preserves->avx512_registers) {
	features->avx512f = IsBitSet(leaf_7.ebx, 16);
	features->avx512cd = IsBitSet(leaf_7.ebx, 28);
	features->avx512er = IsBitSet(leaf_7.ebx, 27);
	features->avx512pf = IsBitSet(leaf_7.ebx, 26);
	features->avx512bw = IsBitSet(leaf_7.ebx, 30);
	features->avx512dq = IsBitSet(leaf_7.ebx, 17);
	features->avx512vl = IsBitSet(leaf_7.ebx, 31);
	features->avx512ifma = IsBitSet(leaf_7.ebx, 21);
	features->avx512vbmi = IsBitSet(leaf_7.ecx, 1);
	features->avx512vbmi2 = IsBitSet(leaf_7.ecx, 6);
	features->avx512vnni = IsBitSet(leaf_7.ecx, 11);
	features->avx512bitalg = IsBitSet(leaf_7.ecx, 12);
	features->avx512vpopcntdq = IsBitSet(leaf_7.ecx, 14);
	features->avx512_4vnniw = IsBitSet(leaf_7.edx, 2);
	features->avx512_4vbmi2 = IsBitSet(leaf_7.edx, 3);
	features->avx512_second_fma = HasSecondFMA(info);
	features->avx512_4fmaps = IsBitSet(leaf_7.edx, 3);
	features->avx512_bf16 = IsBitSet(leaf_7_1.eax, 5);
	features->avx512_vp2intersect = IsBitSet(leaf_7.edx, 8);
	}

Is there any objection that I open a PR to add this for cpu_features?

[toor1245]

@damageboy, thank you for the issue! No objection

[damageboy]

@toor1245 looks working on my end, PR includes listing for tiger-lake + alder-lake and show this working as expected.
I will need some sort of maintainer approval to run the pipeline