gx

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, GatherNd, util } from '@tensorflow/tfjs-core';
import { GatherNDProgram } from '../gather_nd_gpu';
import { gatherNdImplCPU } from '../kernel_utils/shared';
import { reshape } from './Reshape';
export function gatherNd(args) {
    const { inputs, backend } = args;
    const { params, indices } = inputs;
    const indicesShape = indices.shape;
    const sliceRank = indicesShape[indicesShape.length - 1];
    const paramsSize = util.sizeFromShape(params.shape);
    const [resultShape, numSlices, sliceSize, strides] = backend_util.prepareAndValidate(params, indices);
    const flattenIndices = reshape({ inputs: { x: indices }, backend, attrs: { shape: [numSlices, sliceRank] } });
    const flattenX = reshape({
        inputs: { x: params },
        backend,
        attrs: { shape: [(util.sizeFromShape(params.shape) / sliceSize), sliceSize] }
    });
    if (backend.shouldExecuteOnCPU([params, indices]) ||
        params.dtype === 'string') {
        const indicesData = backend.readSync(indices.dataId);
        const paramsBuf = backend.bufferSync(params);
        const outValue = gatherNdImplCPU(indicesData, paramsBuf, params.dtype, numSlices, sliceRank, sliceSize, strides, params.shape, paramsSize);
        return backend.makeTensorInfo(resultShape, params.dtype, outValue.values);
    }
    const program = new GatherNDProgram(sliceRank, strides, [numSlices, sliceSize], params.shape);
    const res = backend.runWebGLProgram(program, [flattenX, flattenIndices], flattenX.dtype);
    const reshaped = reshape({ inputs: { x: res }, backend, attrs: { shape: resultShape } });
    backend.disposeIntermediateTensorInfo(flattenIndices);
    backend.disposeIntermediateTensorInfo(flattenX);
    backend.disposeIntermediateTensorInfo(res);
    return reshaped;
}
export const gatherNdConfig = {
    kernelName: GatherNd,
    backendName: 'webgl',
    kernelFunc: gatherNd
};
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