# rmsNorm(scale:epsilon:) Adds an RMS spatial normalization operation to the current graph. ``` func rmsNorm(scale: some BNNSGraph.Builder.OperationParameter, epsilon: Float = .ulpOfOne.squareRoot()) -> BNNSGraph.Builder.Tensor ``` ## Parameters `scale` The scale. `epsilon` The epsilon value that the function uses to avoid division by zero. ## Discussion This function performs `y = x / sqrt(sum_square(x) / size(x) + epsilon) * scale`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)