Report the alignment this system needs for SIMD allocations.
This will return the minimum number of bytes to which a pointer must be
aligned to be compatible with SIMD instructions on the current machine. For
example, if the machine supports SSE only, it will return 16, but if it
supports AVX-512F, it'll return 64 (etc). This only reports values for
instruction sets SDL knows about, so if your SDL build doesn't have
SDL_HasAVX512F(), then it might return 16 for the SSE support it sees and
not 64 for the AVX-512 instructions that exist but SDL doesn't know about.
Plan accordingly.
Report the alignment this system needs for SIMD allocations.
This will return the minimum number of bytes to which a pointer must be aligned to be compatible with SIMD instructions on the current machine. For example, if the machine supports SSE only, it will return 16, but if it supports AVX-512F, it'll return 64 (etc). This only reports values for instruction sets SDL knows about, so if your SDL build doesn't have SDL_HasAVX512F(), then it might return 16 for the SSE support it sees and not 64 for the AVX-512 instructions that exist but SDL doesn't know about. Plan accordingly.