Function llvmint::x86::xop_vpermil2pd_256

pub unsafe extern "C" fn xop_vpermil2pd_256(
    a: f64x4, 
    b: f64x4, 
    c: i64x4, 
    d: i8
) -> f64x4

The llvm.x86.xop.vpermil2pd.256 intrinsic; known as __builtin_ia32_vpermil2pd256 in GCC.