> x86-64 ABI has clause about aligning static vars to 128bit boundary at a > given size. This was introduced to aid compiler to generate aligned > vector store/load even if the object may bind to other object file. > This is set to stone and can not be changed for AVX/SSE.
Yes, but that's irrelevant in 32-bit mode. > For other objects that are fully under local control we can bump up > alignment more. I remember this code was originally supposed to bump up > to 128bits since it was written long before AVX. I suppose it would make > sense to do so when AVX is enabled and we anticipate to use it. So the same unexpected side-effect (decreasing the alignment) probably happened when the maximum alignment was bumped from 128 to 256. -- Eric Botcazou
