opencv

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#include <stdio.h>
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#if defined _WIN32 && (defined(_M_ARM) || defined(_M_ARM64))
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# define _ARM64_DISTINCT_NEON_TYPES
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# include <Intrin.h>
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# include <arm_neon.h>
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# define CV_NEON 1
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#elif defined(__ARM_NEON)
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#  include <arm_neon.h>
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#  define CV_NEON 1
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#endif
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// MSVC 2019 bug. Details: https://github.com/opencv/opencv/pull/16027
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void test_aliased_type(const uint8x16_t& a) { }
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void test_aliased_type(const int8x16_t& a) { }
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#if defined CV_NEON
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int test()
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{
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    const float src[] = { 0.0f, 0.0f, 0.0f, 0.0f };
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    float32x4_t val = vld1q_f32((const float32_t*)(src));
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    return (int)vgetq_lane_f32(val, 0);
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}
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#else
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#error "NEON is not supported"
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#endif
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int main()
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{
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  printf("%d\n", test());
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  return 0;
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}
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