1  #if defined(DETECT_FEATURES) && defined(__INTEL_COMPILER)
 2      /*
 3       * Unlike GCC and CLANG, Intel Compiler exposes all supported intrinsics,
 4       * whether or not the build options for those features are specified.
 5       * Therefore, we must test #definitions of CPU features when option native/host
 6       * is enabled via `--cpu-baseline` or through env var `CFLAGS` otherwise
 7       * the test will be broken and leads to enable all possible features.
 8       */
 9      #ifndef __AVX2__
10          #error "HOST/ARCH doesn't support AVX2"
11      #endif
12  #endif
13  
14  #include <immintrin.h>
15  
16  int main(int argc, char **argv)
17  {
18      __m256i a = _mm256_abs_epi16(_mm256_loadu_si256((const __m256i*)argv[argc-1]));
19      return _mm_cvtsi128_si32(_mm256_castsi256_si128(a));
20  }