Question on emmintrin.h header file

[Joel_E_]

Hi,

I had some errors during compilation of OpenVino samples on my older i7 CPU (i7 870 to be exact).

The compilation error was related to _mm_blendv_ps which was introduced on SSE4.1 technology according to this documentation.

This was solved by changing "defs.h" include file from emmintrin.h (SSE2) to either smmintrin.h (SSE4.1) or nmmintrin.h (SSE4.2).

Obviously _mm_blendv_ps was introduced from SSE4.1 so I was wondering why emmintrin.h was used? Is this a bug?

Any instructions/advice instead if the current solution is not advisable.

Thanks in advance.

Regards,

Joel

[berupon]

Hi, Joel E. Thanks a lot for the medium post. It helped me to solve the problem with VS2017.

Regarding the header file to include,
  MSVC : <intrin.h>
  gcc/clang : <x86intrin.h>
might be preferrable. It seems like x64 gcc/clang also has <intrin.h> but x86 gcc/clang lack it.
Anyways, <intrin.h> file contains include statements for non-x86 processors such as <arm_neon.h>, which can be a taboo for the bunnysuits.

[Joel_E_]

Hi berupon,

Thanks for your reply! It's good to know about the other header files related to MSVC and gcc.

Hope others will also find this useful.

Regards,
Joel