---
title: "simd_reduce_max(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_reduce_max(_:)-55m7m"
---

# simd_reduce_max(_:)

Returns the maximum value in a vector.

## Declaration

```swift
func simd_reduce_max(_ x: simd_long8) -> simd_long1
```

## See Also

### Reduce Functions

- [simd_reduce_min(_:)](simd/simd_reduce_min(_:)-3okve.md)
- [simd_reduce_add(_:)](simd/simd_reduce_add(_:)-3b63s.md)