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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 { Acos } from '../kernel_names';
import { cast } from '../ops/cast';
import { div } from '../ops/div';
import { neg } from '../ops/neg';
import { scalar } from '../ops/scalar';
import { sqrt } from '../ops/sqrt';
import { square } from '../ops/square';
import { sub } from '../ops/sub';
export const acosGradConfig = {
    kernelName: Acos,
    inputsToSave: ['x'],
    gradFunc: (dy, saved) => {
        const [x] = saved;
        return {
            x: () => {
                const a = square(cast(x, 'float32'));
                const b = sqrt(sub(scalar(1), a));
                return neg(div(dy, b));
            }
        };
    }
};
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