Question on SSE intrinsics

[Johan Engelen via Digitalmars-d-learn]

On Saturday, 29 July 2017 at 16:01:07 UTC, piotrekg2 wrote:
> Hi,
> I'm trying to port some of my c++ code which uses sse2 
> instructions into D. The code calls the following intrinsics:
>
> - _mm256_loadu_si256
> - _mm256_movemask_epi8
>
> Do they have any equivalent intrinsics in D?

Yes, with LDC (probably GDC too).
But unfortunately we don't have the "_mm256" functions (yet?), 
instead we have GCC's "__builtin_ia32..." functions.

The first one you mention I think is just an unaligned load? That 
can be done with the template `loadUnaligned` from module 
ldc.simd.

The second one has a synonym, "__builtin_ia32_pmovmskb256".

-Johan