Define headers

[Jamaika1]

No description provided.

[Jovasa]

Why are you checking for AVX512 when all of the optimizations are AVX2?

[Jamaika1]

Hi Jovasa
I use mavx2 and (gcc 11.5.0 or 15.0.0 20241110).
Encoder hevc and vvc didn't want to work and I started looking for the problem.
The guilty function is _mm256_srli_si256 in 'missing-intel-intrinsics.h'. I change define AVX2 in AVX512 and codec works.
I took a look at the functions in simde.
https://github.com/simd-everywhere/simde/blob/master/simde/simde-features.h

#if defined(SIMDE_X86_AVX512F_NATIVE) && !defined(SIMDE_X86_AVX2_NATIVE)
  #define SIMDE_X86_AVX2_NATIVE
#endif
...
#if !defined(SIMDE_X86_AVX2_NATIVE) && !defined(SIMDE_X86_AVX2_NO_NATIVE) && !defined(SIMDE_NO_NATIVE)
  #if defined(SIMDE_ARCH_X86_AVX2)
    #define SIMDE_X86_AVX2_NATIVE
  #endif
#endif
#if defined(SIMDE_X86_AVX2_NATIVE) && !defined(SIMDE_X86_AVX_NATIVE)
  #define SIMDE_X86_AVX_NATIVE
#endif
....
#if defined(SIMDE_X86_AVX2_NATIVE)
#  define simde_mm256_srli_si256(a, imm8) _mm256_srli_si256(a, imm8)
#endif