Macro safe_arch::shuffle_abi_f64_all_m128d

macro_rules! shuffle_abi_f64_all_m128d {
    ($a:expr, $b:expr, [a:$z:expr, b:$o:expr]) => { ... };
}

Shuffle the f64 lanes from $a and $b together using an immediate control value.

The a: and b: prefixes on the index selection values are literal tokens that you type. It helps keep clear what value comes from where. The first two output lanes come from $a, the second two output lanes come from $b.

You can pass the same value as both arguments, but if you want to swizzle within only a single register and you have avx available consider using shuffle_ai_f64_all_m128d instead. You'll get much better performance.

let a = m128d::from_array([1.0, 2.0]);
let b = m128d::from_array([3.0, 4.0]);
//
let c = shuffle_abi_f64_all_m128d!(a, b, [a:0, b:0]).to_array();
assert_eq!(c, [1.0, 3.0]);
//
let c = shuffle_abi_f64_all_m128d!(a, b, [a:0, b:1]).to_array();
assert_eq!(c, [1.0, 4.0]);