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26 lines
984 B
26 lines
984 B
6 months ago
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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(__AVX512ER__) || !defined(__AVX512PF__)
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#error "HOST/ARCH doesn't support Knights Landing 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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int base[128]={};
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__m512d ad = _mm512_loadu_pd((const __m512d*)argv[argc-1]);
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/* ER */
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__m512i a = _mm512_castpd_si512(_mm512_exp2a23_pd(ad));
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/* PF */
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_mm512_mask_prefetch_i64scatter_pd(base, _mm512_cmpeq_epi64_mask(a, a), a, 1, _MM_HINT_T1);
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return base[0];
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}
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