Does VC++ support _mm_malloc?

Question

Does Visual Studio C++ 2008/2010 support _mm_malloc officially? It is defined in malloc.h but I can't find its description in the MSDN library.

Tardigrade

Answer 1

Doesn't answer your question directly, but I think you're suppose to use _aligned_malloc. If my understanding is correct, _mm_malloc is for Intel compilers.

Cyanate

_mm_malloc is supported by gcc, and _aligned_malloc is not. Microsoft compiler seems to be support it too, but I can't find any official paper about it. – Tardigrade

It's seems to not be officially supported, the msvc "implementation" is just #define _mm_malloc(a, b) _aligned_malloc(a, b) so it's pretty much just a matter of whether you want to rely on MS not changing that(a pretty good assumption is they'll keep that around), or provide a similar define when you're compiling for windows. – Regimentals

It should be noted that _aligned_alloc is NOT the C11/C++11 aligned_alloc : the parameters are inverted and _aligned_alloc is not compatible with free. – Boise

Answer 2

_mm_malloc/_mm_free supported in Visual Studio 2013 with using the <malloc.h> header.

Mardis

"using the header" - which header? – Mozambique

@Mozambique The one in the question: <malloc.h> – Mardis

Answer 3

See Equivalent C code for _mm_ type functions and, more distantly related, How to allocate aligned memory only using the standard library?

Javelin

I know how to manually achieve alignment. The question wasn't about it. The first link has nothing to do with my question too. – Tardigrade

I see - I misunderstood your question. – Javelin

Answer 4

Doesn't memalign() in <malloc.h> solve this? The man-page says it's obsolete, but ...

Christhood