Function maxPool3DGrad

tfjs-backend-webgpu/src/kernels/MaxPool3DGrad.ts:24–96

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

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

export function maxPool3DGrad(args: {
  inputs: MaxPool3DGradInputs,
  backend: WebGPUBackend,
  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 */);
  let uniformData = [
    {
      type: 'int32',
      data: [convInfo.strideDepth, convInfo.strideHeight, convInfo.strideWidth]
    },
    {
      type: 'int32',
      data:
          [convInfo.padInfo.front, convInfo.padInfo.top, convInfo.padInfo.left]
    },
    {
      type: 'int32',
      data: [convInfo.inDepth, convInfo.inHeight, convInfo.inWidth]
    },
    {
      type: 'int32',
      data: [
        convInfo.effectiveFilterDepth, convInfo.effectiveFilterHeight,
        convInfo.effectiveFilterWidth
      ]
    }
  ];
  const maxPool3dPositions = backend.runWebGPUProgram(
      maxPool3dPositionsProgram, [x], 'int32', uniformData);

  const maxPool3dBackpropProgram = new MaxPool3DBackpropProgram(convInfo);
  uniformData = [
    {
      type: 'int32',
      data: [convInfo.strideDepth, convInfo.strideHeight, convInfo.strideWidth]
    },
    {
      type: 'int32',
      data: [
        convInfo.effectiveFilterDepth - 1 - convInfo.padInfo.front,
        convInfo.effectiveFilterHeight - 1 - convInfo.padInfo.top,
        convInfo.effectiveFilterWidth - 1 - convInfo.padInfo.left
      ]
    },
    {
      type: 'int32',