clang supports some of these 512bit builtins - do you have support for them?

__builtin_ia32_pshufb512
__builtin_ia32_permvarqi512
__builtin_ia32_permvarsi512
__builtin_ia32_cvtb2mask512
__builtin_ia32_cvtd2mask512
__builtin_ia32_sqrtps512
__builtin_ia32_vpopcntq_512
__builtin_ia32_pclmulqdq128
__builtin_ia32_vpermi2varqi512