---
title: "simd_rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_rsqrt(_:)-rgh7"
---

# simd_rsqrt(_:)

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

## Declaration

```swift
func simd_rsqrt(_ x: simd_half3) -> simd_half3
```

## See Also

### Reciprocal and reciprocal square root functions

- [simd_recip(_:)](simd/simd_recip(_:)-8k0yn.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-61jmz.md)
- [simd_precise_rsqrt(_:)](simd/simd_precise_rsqrt(_:)-znwt.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-okeq.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-80xc1.md)