---
title: "rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/rsqrt(_:)-3g5ej"
---

# rsqrt(_:)

Returns the reciprocal square root of each element in a vector.

## Declaration

```swift
func rsqrt(_ x: SIMD4<Float>) -> SIMD4<Float>
```

## See Also

### Reciprocal and Reciprocal Square Root Functions

- [simd_recip(_:)](simd/simd_recip(_:)-820ma.md)
- [recip(_:)](simd/recip(_:)-3idnw.md)
- [simd_rsqrt(_:)](simd/simd_rsqrt(_:)-i4we.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-6ptoq.md)
- [simd_precise_rsqrt(_:)](simd/simd_precise_rsqrt(_:)-136xw.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-6nf.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-8p7fk.md)