Class OneHotProgram

tfjs-backend-webgpu/src/onehot_webgpu.ts:21–52

import {computeDispatch, flatDispatchLayout} from './webgpu_util';

export class OneHotProgram implements WebGPUProgram {
  outputShape: number[];
  shaderKey: string;
  dispatchLayout: {x: number[]};
  dispatch: [number, number, number];
  variableNames = ['x'];
  uniforms = 'onValue : f32, offValue : f32,';
  workgroupSize: [number, number, number] = [64, 1, 1];
  size = true;

  constructor(numIndices: number, depth: number) {
    this.outputShape = [numIndices, depth];
    this.dispatchLayout = flatDispatchLayout(this.outputShape);
    this.dispatch = computeDispatch(
        this.dispatchLayout, this.outputShape, this.workgroupSize);
    this.shaderKey = 'onehot';
  }

  getUserCode(): string {
    const userCode = `
      ${main('index')} {
        if(index < uniforms.size) {
          let coords = getCoordsFromIndex(index);
          setOutputAtIndex(index, mix(uniforms.offValue, uniforms.onValue,
                                      f32(i32(round(getX(coords.x))) == coords.y)));
        }
      }
    `;

    return userCode;
  }
}