name : cpu_avx512_knm.c #if defined(DETECT_FEATURES) && defined(__INTEL_COMPILER) /* * Unlike GCC and CLANG, Intel Compiler exposes all supported intrinsics, * whether or not the build options for those features are specified. * Therefore, we must test #definitions of CPU features when option native/host * is enabled via `--cpu-baseline` or through env var `CFLAGS` otherwise * the test will be broken and leads to enable all possible features. */ #if !defined(__AVX5124FMAPS__) || !defined(__AVX5124VNNIW__) || !defined(__AVX512VPOPCNTDQ__) #error "HOST/ARCH doesn't support Knights Mill AVX512 features" #endif #endif #include <immintrin.h> int main(int argc, char **argv) { __m512i a = _mm512_loadu_si512((const __m512i*)argv[argc-1]); __m512 b = _mm512_loadu_ps((const __m512*)argv[argc-2]); /* 4FMAPS */ b = _mm512_4fmadd_ps(b, b, b, b, b, NULL); /* 4VNNIW */ a = _mm512_4dpwssd_epi32(a, a, a, a, a, NULL); /* VPOPCNTDQ */ a = _mm512_popcnt_epi64(a); a = _mm512_add_epi32(a, _mm512_castps_si512(b)); return _mm_cvtsi128_si32(_mm512_castsi512_si128(a)); }