# cmpord_sd(v128, v128)

> Compare the lower double-precision (64-bit) floating-point elements in "a" and "b" to see if neither is NaN, store the result in the lower element of "dst", and copy the upper element from "a" to the upper element of "dst".

## Definition

* **Type:** Method
* **Namespace:** [Unity.Burst.Intrinsics](/engine/6000.6/script-reference/unity/burst/intrinsics.md)
* **Assembly:** UnityEngine.BurstModule

```csharp
public static v128 cmpord_sd(v128 a, v128 b)
```

### Parameters

**** (\[v128]\(/engine/6000.6/script-reference/unity/burst/intrinsics/v128)): Vector a**** (\[v128]\(/engine/6000.6/script-reference/unity/burst/intrinsics/v128)): Vector b

### Returns

| Type                                                                   | Description |
| ---------------------------------------------------------------------- | ----------- |
| [v128](/engine/6000.6/script-reference/unity/burst/intrinsics/v128.md) | Vector      |