should works better with intel compiler

Src/Utils/FAvx.hpp

+#ifndef FAVX_HPP
+#define FAVX_HPP
+
+#include "immintrin.h"
+
+#ifdef __INTEL_COMPILER
+
+//Side effect operators DOUBLE
+inline __m256d& operator+=(__m256d & a, __m256d & b){
+  return (a = _mm256_add_pd (a,b));
+}
+
+inline __m256d& operator-=(__m256d& a, __m256d& b){
+  return (a = _mm256_sub_pd (a,b));
+}
+
+inline __m256d& operator*=(__m256d& a, __m256d& b){
+  return (a = _mm256_mul_pd (a,b));
+}
+
+inline __m256d& operator/=(__m256d& a, __m256d& b){
+  return (a = _mm256_div_pd (a,b));
+}
+
+//No side effect operators DOUBLE
+inline __m256d operator+(const __m256d& a,const  __m256d& b){
+  return _mm256_add_pd (a,b);
+}
+
+inline __m256d operator-(const __m256d& a, const __m256d& b){
+  return _mm256_sub_pd (a,b);
+}
+
+inline __m256d operator*(const __m256d& v1, const __m256d& v2){
+    return _mm256_mul_pd(v1, v2);
+}
+
+inline __m256d operator/(const __m256d& v1, const __m256d& v2){
+    return _mm256_div_pd(v1, v2);
+}
+
+//Side effect operators SINGLE
+inline __m256& operator+=(__m256 & a, const __m256 & b){
+  return (a = _mm256_add_ps (a,b));
+}
+
+inline __m256& operator-=(__m256& a, const __m256& b){
+  return (a = _mm256_sub_ps (a,b));
+}
+
+inline __m256& operator*=(__m256& a, const __m256& b){
+  return (a = _mm256_mul_ps (a,b));
+}
+
+inline __m256& operator/=(__m256& a, const __m256& b){
+  return (a = _mm256_div_ps (a,b));
+}
+
+//No side effect operators SINGLE
+inline __m256 operator+(const __m256& a,const  __m256& b){
+  return _mm256_add_ps (a,b);
+}
+
+inline __m256 operator-(const __m256& a, const __m256& b){
+  return _mm256_sub_ps (a,b);
+}
+
+inline __m256 operator*(const __m256& v1, const __m256& v2){
+    return _mm256_mul_ps(v1, v2);
+}
+
+inline __m256 operator/(const __m256& v1, const __m256& v2){
+    return _mm256_div_ps(v1, v2);
+}
+
+#endif
+
+#endif