# vrshld_u64(ulong, long)

> Unsigned Rounding Shift Left (register). This instruction takes each element in the vector of the first source SIMD&FP register, shifts the vector element by a value from the least significant byte of the corresponding element of the second source SIMD&FP register, places the results in a vector, and writes the vector to the destination SIMD&FP register.If the shift value is positive, the operation is a left shift. If the shift value is negative, it is a rounding right shift.Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped. Equivalent instruction: URSHL Dd,Dn,Dm

## Definition

* **Type:** Method
* **Namespace:** [Unity.Burst.Intrinsics](/engine/6000.7/script-reference/unity/burst/intrinsics.md)
* **Assembly:** UnityEngine.BurstModule

```csharp
public static ulong vrshld_u64(ulong a0, long a1)
```

### Parameters

**** (\[ulong]\(https\://learn.microsoft.com/dotnet/api/system.uint64)): UInt64 a0**** (\[long]\(https\://learn.microsoft.com/dotnet/api/system.int64)): Int64 a1

### Returns

| Type                                                          | Description |
| ------------------------------------------------------------- | ----------- |
| [ulong](https://learn.microsoft.com/dotnet/api/system.uint64) | UInt64      |