Function maxPool3DGrad

tfjs-backend-webgl/src/kernels/MaxPool3DGrad.ts:23–47

(args: {
  inputs: MaxPool3DGradInputs,
  backend: MathBackendWebGL,
  attrs: MaxPool3DGradAttrs
})

import {Pool3DProgram} from '../pool_gpu';

export function maxPool3DGrad(args: {
  inputs: MaxPool3DGradInputs,
  backend: MathBackendWebGL,
  attrs: MaxPool3DGradAttrs
}): TensorInfo {
  const {inputs, backend, attrs} = args;
  const {dy, input} = inputs;
  const x = input;
  const {filterSize, strides, pad, dimRoundingMode} = attrs;
  const dilations: [number, number, number] = [1, 1, 1];

  const convInfo = backend_util.computePool3DInfo(
      x.shape as [number, number, number, number, number], filterSize, strides,
      dilations, pad, dimRoundingMode);

  const maxPool3dPositionsProgram =
      new Pool3DProgram(convInfo, 'max', true /* get positions */);
  const maxPool3dPositions =
      backend.runWebGLProgram(maxPool3dPositionsProgram, [x], x.dtype);
  const maxPoolBackpropProgram = new MaxPool3DBackpropProgram(convInfo);
  const result = backend.runWebGLProgram(
      maxPoolBackpropProgram, [dy, maxPool3dPositions], x.dtype);
  backend.disposeIntermediateTensorInfo(maxPool3dPositions);
  return result;
}

export const maxPool3DGradConfig: KernelConfig = {
  kernelName: MaxPool3DGrad,