Function llvmint::x86::avx512_mask_cvtqq2pd_256

pub unsafe extern "C" fn avx512_mask_cvtqq2pd_256(
    a: i64x4, 
    b: f64x4, 
    c: i8
) -> f64x4

The llvm.x86.avx512.mask.cvtqq2pd.256 intrinsic; known as __builtin_ia32_cvtqq2pd256_mask in GCC.