Chapter 7.4 : The intrinsics version of Saxpy

• 7.4.1) The main_intrinsics.cpp
• 7.4.2) The CMakeLists.txt
• 7.4.3) The compilation
• 7.4.4) The performances

During this section, we will use :

• Inclusion of file immintrin.h
• Intrinsic function : _mm256_load_ps
• Intrinsic function : _mm256_store_ps
• Intrinsic function : _mm256_mul_ps
• Intrinsic function : _mm256_add_ps
• Intrinsic function : _mm256_broadcast_ss (to duplicate a float 8 times in a vectorial register)
• Enable specific optimisations with -O3 -march=native -mtune=native -mavx2