cpu_fma4.c
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| c
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#include <immintrin.h> #ifdef _MSC_VER #include <ammintrin.h> #else #include <x86intrin.h> #endif int main(int argc, char **argv) { __m256 a = _mm256_loadu_ps((const float*)argv[argc-1]); a = _mm256_macc_ps(a, a, a); return (int)_mm_cvtss_f32(_mm256_castps256_ps128(a)); }
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