---
title: "simd_precise_rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_precise_rsqrt(_:)-6j2jj"
---

# simd_precise_rsqrt(_:)

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

## Declaration

```swift
func simd_precise_rsqrt(_ x: simd_half16) -> simd_half16
```

## See Also

### Reciprocal and reciprocal square root functions

- [simd_recip(_:)](simd/simd_recip(_:)-5bvrv.md)
- [simd_rsqrt(_:)](simd/simd_rsqrt(_:)-765rp.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-5icut.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-mw6p.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-686mo.md)