---
title: "simd_rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_rsqrt(_:)-rhpf"
---

# simd_rsqrt(_:)

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

## Declaration

```swift
func simd_rsqrt(_ x: simd_double3) -> simd_double3
```

## See Also

### Reciprocal and Reciprocal Square Root Functions

- [simd_recip(_:)](simd/simd_recip(_:)-8jzqn.md)
- [recip(_:)](simd/recip(_:)-6uvj7.md)
- [rsqrt(_:)](simd/rsqrt(_:)-6298y.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-61i77.md)
- [simd_precise_rsqrt(_:)](simd/simd_precise_rsqrt(_:)-zrh9.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-ogui.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-80w49.md)