---
title: "simd_rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_rsqrt(_:)-76a19"
---

# simd_rsqrt(_:)

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

## Declaration

```swift
func simd_rsqrt(_ x: simd_float16) -> simd_float16
```

## See Also

### Reciprocal and Reciprocal Square Root Functions

- [simd_recip(_:)](simd/simd_recip(_:)-5bwdz.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-mza9.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-5ic8t.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-6862g.md)
- [simd_precise_rsqrt(_:)](simd/simd_precise_rsqrt(_:)-6j35f.md)