Result before this patch:
Checking enum `cpu_feature_t': 113 elements; max size (CPU_FLAGS_MAX=128)... OK
Checking enum `cpu_hint_t': 1 elements; max size (CPU_HINTS_MAX=16)... OK
Checking enum `cpu_sgx_feature_t': 2 elements; max size (SGX_FLAGS_MAX=14)... OK
Finding features:
..Mismatch - cpuid_main.c:688 - `AVX512VNNI' vs `avx512_vnni'
..Mismatch - cpuid_main.c:689 - `AVX512VBMI' vs `avx512_vbmi'
..Mismatch - cpuid_main.c:690 - `AVX512VBMI2' vs `avx512_vbmi2'
cpuid_main.c: 113 features described
Found 113 total features and 113 named features
Checking whether all features have detection code... FAILED:
..No detection code for CPU_FEATURE_SSE5
Add support for detecting Coffee Lake i[357]s. Test included.
Thanks to @X0rg for reporting and to @exdeus for the raw cpu data.
The detection here relies on Kaby and Coffee lakes having different
number of cores for the equivalent brand:
i3: 2 cores in Kaby, 4 in Coffee
i5 and i7: 4 cores in Kaby, 6 in Coffee.
