gx

chenyc

2025-02-12 ea42ff3ebee1eeb3fb29423aa848a249441db81c

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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 { ENGINE } from '../engine';
import { Bincount } from '../kernel_names';
import { convertToTensor } from '../tensor_util_env';
import * as util from '../util';
import { op } from './operation';
/**
 * Outputs a vector with length `size` and the same dtype as `weights`.
 *
 * If `weights` are empty, then index `i` stores the number of times the value
 * `i` is counted in `x`. If `weights` are non-empty, then index `i` stores the
 * sum of the value in `weights` at each index where the corresponding value in
 * `x` is `i`.
 *
 * Values in `x` outside of the range [0, size) are ignored.
 *
 * @param x The input int tensor, rank 1.
 * @param weights The weights tensor, must have the same shape as x, or a
 *     length-0 Tensor, in which case it acts as all weights equal to 1.
 * @param size Non-negative integer.
 *
 * @doc {heading: 'Operations', subheading: 'Reduction'}
 */
function bincount_(x, weights, size) {
    const $x = convertToTensor(x, 'x', 'bincount');
    const $weights = convertToTensor(weights, 'weights', 'bincount');
    util.assert($x.dtype === 'int32', () => `Error in bincount: input ` +
        `dtype must be int32, but got ${$x.dtype}`);
    util.assert(size >= 0, () => `size must be non-negative, but got ${size}.`);
    util.assert($weights.size === $x.size || $weights.size === 0, () => `Error in bincount: weights must have the same size as input or` +
        `0-length, but got input shape: ${$x.shape}, weights shape: ` +
        `${$weights.shape}.`);
    const inputs = { x: $x, weights: $weights };
    const attrs = { size };
    return ENGINE.runKernel(Bincount, inputs, attrs);
}
export const bincount = /* @__PURE__ */ op({ bincount_ });
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