Defined if (and only if) the compiler supports Intel AVX-512F intrinsics.
Defined in <SDL3/SDL_intrin.h>
#define SDL_AVX512F_INTRINSICS 1
AVX-512F is also sometimes referred to as "AVX-512 Foundation."
If this macro is defined, SDL will have already included <immintrin.h>
This macro is available since 3.1.3.