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chenyc

2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { backend_util, buffer, MaxPool3DGrad } from '@tensorflow/tfjs-core';
import { assertNotComplex } from '../cpu_util';
import { maxPool3dPositions } from '../utils/pool_utils';
export function maxPool3DGrad(args) {
    const { inputs, backend, attrs } = args;
    const { dy, input } = inputs;
    const { filterSize, strides, pad, dimRoundingMode } = attrs;
    assertNotComplex([dy, input], 'maxPool3DGrad');
    const convInfo = backend_util.computePool3DInfo(input.shape, filterSize, strides, 1 /* dilations */, pad, dimRoundingMode);
    const inputBuf = backend.bufferSync(input);
    const maxPosBuf = maxPool3dPositions(inputBuf, convInfo);
    const strideDepth = convInfo.strideDepth;
    const strideHeight = convInfo.strideHeight;
    const strideWidth = convInfo.strideWidth;
    const dilationDepth = convInfo.dilationDepth;
    const dilationHeight = convInfo.dilationHeight;
    const dilationWidth = convInfo.dilationWidth;
    const effectiveFilterDepth = convInfo.effectiveFilterDepth;
    const effectiveFilterHeight = convInfo.effectiveFilterHeight;
    const effectiveFilterWidth = convInfo.effectiveFilterWidth;
    const padFront = effectiveFilterDepth - 1 - convInfo.padInfo.front;
    const padLeft = effectiveFilterWidth - 1 - convInfo.padInfo.left;
    const padTop = effectiveFilterHeight - 1 - convInfo.padInfo.top;
    const dx = buffer(input.shape, 'float32');
    const dyBuf = backend.bufferSync(dy);
    for (let batch = 0; batch < convInfo.batchSize; ++batch) {
        for (let channel = 0; channel < convInfo.inChannels; ++channel) {
            for (let dxDepth = 0; dxDepth < convInfo.inDepth; ++dxDepth) {
                for (let dxRow = 0; dxRow < convInfo.inHeight; ++dxRow) {
                    for (let dxCol = 0; dxCol < convInfo.inWidth; ++dxCol) {
                        // Shader code begins
                        const dyDepthCorner = dxDepth - padFront;
                        const dyRowCorner = dxRow - padTop;
                        const dyColCorner = dxCol - padLeft;
                        let dotProd = 0;
                        for (let wDepth = 0; wDepth < effectiveFilterDepth; wDepth += dilationDepth) {
                            const dyDepth = (dyDepthCorner + wDepth) / strideDepth;
                            if (dyDepth < 0 || dyDepth >= convInfo.outDepth ||
                                Math.floor(dyDepth) !== dyDepth) {
                                continue;
                            }
                            for (let wRow = 0; wRow < effectiveFilterHeight; wRow += dilationHeight) {
                                const dyRow = (dyRowCorner + wRow) / strideHeight;
                                if (dyRow < 0 || dyRow >= convInfo.outHeight ||
                                    Math.floor(dyRow) !== dyRow) {
                                    continue;
                                }
                                for (let wCol = 0; wCol < effectiveFilterWidth; wCol += dilationWidth) {
                                    const dyCol = (dyColCorner + wCol) / strideWidth;
                                    if (dyCol < 0 || dyCol >= convInfo.outWidth ||
                                        Math.floor(dyCol) !== dyCol) {
                                        continue;
                                    }
                                    const maxPos = effectiveFilterDepth * effectiveFilterHeight *
                                        effectiveFilterWidth -
                                        1 -
                                        maxPosBuf.get(batch, dyDepth, dyRow, dyCol, channel);
                                    const curPos = wDepth * effectiveFilterHeight * effectiveFilterWidth +
                                        wRow * effectiveFilterWidth + wCol;
                                    const mask = maxPos === curPos ? 1 : 0;
                                    if (mask === 0) {
                                        continue;
                                    }
                                    const pixel = dyBuf.get(batch, dyDepth, dyRow, dyCol, channel);
                                    dotProd += pixel * mask;
                                }
                            }
                        }
                        dx.set(dotProd, batch, dxDepth, dxRow, dxCol, channel);
                    }
                }
            }
        }
    }
    return backend.makeTensorInfo(dx.shape, dx.dtype, dx.values);
}
export const maxPool3DGradConfig = {
    kernelName: MaxPool3DGrad,
    backendName: 'cpu',
    kernelFunc: maxPool3DGrad
};
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All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport {backend_util, buffer, KernelConfig, KernelFunc, MaxPool3DGrad, MaxPool3DGradAttrs, MaxPool3DGradInputs, Rank, TensorInfo} from '@tensorflow/tfjs-core';\n\nimport {MathBackendCPU} from '../backend_cpu';\nimport {assertNotComplex} from '../cpu_util';\nimport {maxPool3dPositions} from '../utils/pool_utils';\n\nexport function maxPool3DGrad(args: {\n  inputs: MaxPool3DGradInputs,\n  backend: MathBackendCPU,\n  attrs: MaxPool3DGradAttrs\n}): TensorInfo {\n  const {inputs, backend, attrs} = args;\n  const {dy, input} = inputs;\n  const {filterSize, strides, pad, dimRoundingMode} = attrs;\n\n  assertNotComplex([dy, input], 'maxPool3DGrad');\n\n  const convInfo = backend_util.computePool3DInfo(\n      input.shape as [number, number, number, number, number], filterSize,\n      strides, 1 /* dilations */, pad, dimRoundingMode);\n\n  const inputBuf = backend.bufferSync(input);\n  const maxPosBuf = maxPool3dPositions(inputBuf, convInfo);\n  const strideDepth = convInfo.strideDepth;\n  const strideHeight = convInfo.strideHeight;\n  const strideWidth = convInfo.strideWidth;\n  const dilationDepth = convInfo.dilationDepth;\n  const dilationHeight = convInfo.dilationHeight;\n  const dilationWidth = convInfo.dilationWidth;\n  const effectiveFilterDepth = convInfo.effectiveFilterDepth;\n  const effectiveFilterHeight = convInfo.effectiveFilterHeight;\n  const effectiveFilterWidth = convInfo.effectiveFilterWidth;\n  const padFront = effectiveFilterDepth - 1 - convInfo.padInfo.front;\n  const padLeft = effectiveFilterWidth - 1 - convInfo.padInfo.left;\n  const padTop = effectiveFilterHeight - 1 - convInfo.padInfo.top;\n  const dx = buffer(input.shape, 'float32');\n\n  const dyBuf = backend.bufferSync<Rank, 'float32'>(dy);\n\n  for (let batch = 0; batch < convInfo.batchSize; ++batch) {\n    for (let channel = 0; channel < convInfo.inChannels; ++channel) {\n      for (let dxDepth = 0; dxDepth < convInfo.inDepth; ++dxDepth) {\n        for (let dxRow = 0; dxRow < convInfo.inHeight; ++dxRow) {\n          for (let dxCol = 0; dxCol < convInfo.inWidth; ++dxCol) {\n            // Shader code begins\n            const dyDepthCorner = dxDepth - padFront;\n            const dyRowCorner = dxRow - padTop;\n            const dyColCorner = dxCol - padLeft;\n            let dotProd = 0;\n            for (let wDepth = 0; wDepth < effectiveFilterDepth;\n                 wDepth += dilationDepth) {\n              const dyDepth = (dyDepthCorner + wDepth) / strideDepth;\n              if (dyDepth < 0 || dyDepth >= convInfo.outDepth ||\n                  Math.floor(dyDepth) !== dyDepth) {\n                continue;\n              }\n              for (let wRow = 0; wRow < effectiveFilterHeight;\n                   wRow += dilationHeight) {\n                const dyRow = (dyRowCorner + wRow) / strideHeight;\n                if (dyRow < 0 || dyRow >= convInfo.outHeight ||\n                    Math.floor(dyRow) !== dyRow) {\n                  continue;\n                }\n                for (let wCol = 0; wCol < effectiveFilterWidth;\n                     wCol += dilationWidth) {\n                  const dyCol = (dyColCorner + wCol) / strideWidth;\n                  if (dyCol < 0 || dyCol >= convInfo.outWidth ||\n                      Math.floor(dyCol) !== dyCol) {\n                    continue;\n                  }\n\n                  const maxPos = effectiveFilterDepth * effectiveFilterHeight *\n                          effectiveFilterWidth -\n                      1 -\n                      (maxPosBuf.get(batch, dyDepth, dyRow, dyCol, channel) as\n                       number);\n                  const curPos =\n                      wDepth * effectiveFilterHeight * effectiveFilterWidth +\n                      wRow * effectiveFilterWidth + wCol;\n\n                  const mask = maxPos === curPos ? 1 : 0;\n                  if (mask === 0) {\n                    continue;\n                  }\n\n                  const pixel =\n                      dyBuf.get(batch, dyDepth, dyRow, dyCol, channel);\n                  dotProd += pixel * mask;\n                }\n              }\n            }\n            dx.set(dotProd, batch, dxDepth, dxRow, dxCol, channel);\n          }\n        }\n      }\n    }\n  }\n\n  return backend.makeTensorInfo(dx.shape, dx.dtype, dx.values);\n}\n\nexport const maxPool3DGradConfig: KernelConfig = {\n  kernelName: MaxPool3DGrad,\n  backendName: 'cpu',\n  kernelFunc: maxPool3DGrad as unknown as KernelFunc\n};\n"]}