# set_sd(double)

> Copy double-precision (64-bit) floating-point element "a" to the lower element of "dst", and zero the upper element.

## Definition

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

```csharp
public static v128 set_sd(double a)
```

### Parameters

**** (\[double]\(https\://learn.microsoft.com/dotnet/api/system.double)): Double-precision floating-point element

### Returns

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