---
title: vbsl_u64(v64, v64, v64)
product: Unity Editor
version: '6000.7'
latest_version: '7000.0'
status: This page documents version 6000.7. The latest version is 7000.0.
canonical: https://docs.unity.com/en-us/engine/6000.7/script-reference/unity/burst/intrinsics/arm/neon/vbsl-u64
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unity/burst/intrinsics/arm/neon/vbsl-u64.md
last_updated: 2026-09-14
generated_at: 2026-11-08T11:07:47.426Z
locale: en-us
---

# vbsl_u64(v64, v64, v64)

> Bitwise Select. This instruction sets each bit in the destination SIMD&FP register to the corresponding bit from the first source SIMD&FP register when the original destination bit was 1, otherwise from the second source SIMD&FP register.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: BSL Vd.8B,Vn.8B,Vm.8B

## Definition

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

```csharp
public static v64 vbsl_u64(v64 a0, v64 a1, v64 a2)
```

### Parameters

**** (\[v64]\(/engine/6000.7/script-reference/unity/burst/intrinsics/v64)): 64-bit vector a0**** (\[v64]\(/engine/6000.7/script-reference/unity/burst/intrinsics/v64)): 64-bit vector a1**** (\[v64]\(/engine/6000.7/script-reference/unity/burst/intrinsics/v64)): 64-bit vector a2

### Returns

| Type                                                                 | Description   |
| -------------------------------------------------------------------- | ------------- |
| [v64](/engine/6000.7/script-reference/unity/burst/intrinsics/v64.md) | 64-bit vector |