ai.onnx.Cast

ai.onnx · standard ONNX operator · ONNX opset ≥ 13

Description

Casts every element of the input tensor to a supported target numeric dtype, producing an output of the same shape. A conversion may change values, for example when narrowing an integer or converting a float to boolean.

See the ONNX Cast spec for the reference semantics.

Inputs

Outputs

Attributes

Attributes and default values (overridable per request):

Type constraints

Files

• metadata.json — kernel metadata (id, digests, provenance)
• manifest.json — the op contract (source of truth)
• test.json — correctness cases
• bench.json — benchmark + tuning cases
• cast-scalar-x4.wgsl.jinja
• unary-scalar.wgsl.jinja
• unary-vec4.wgsl.jinja

Use with @huggingface/kernels

The loader derives every required output's shape and logical dtype from the manifest contract and this call. It then allocates the result tensors automatically.

The version: 1 option selects the published kernel contract; it is independent of any operator opset, contrib since_version, or model version.

Replace each *Data placeholder with a typed array containing the corresponding input data.

import { getKernel } from "@huggingface/kernels";

const kernel = await getKernel("webgpu-kernels/ai.onnx.Cast", { version: 1 });
const { y } = await kernel({ x: { data: xData, shape: [] } }, {
  attrs: { to: 6 },
});