---
title: "simd_precise_rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_precise_rsqrt(_:)-1hqkg"
---

# simd_precise_rsqrt(_:)

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

## Declaration

```swift
func simd_precise_rsqrt(_ x: simd_float8) -> simd_float8
```

## See Also

### Reciprocal and Reciprocal Square Root Functions

- [simd_recip(_:)](simd/simd_recip(_:)-989se.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-16fz3.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-74deu.md)
- [simd_rsqrt(_:)](simd/simd_rsqrt(_:)-1oj3u.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-923f0.md)