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