Function llvmint::x86::avx512_mask_vpermt2var_pd_512

pub unsafe extern "C" fn avx512_mask_vpermt2var_pd_512(
    a: i64x8, 
    b: f64x8, 
    c: f64x8, 
    d: i8
) -> f64x8

The llvm.x86.avx512.mask.vpermt2var.pd.512 intrinsic; known as __builtin_ia32_vpermt2varpd512_mask in GCC.