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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 { EluGrad, env } from '@tensorflow/tfjs-core';
import { BinaryOpProgram } from '../binaryop_gpu';
import { BinaryOpPackedProgram } from '../binaryop_packed_gpu';
const ELU_DER = `return (b >= 0.0) ? a : a * (b + 1.0);`;
const ELU_DER_PACKED = `
  vec4 bGTEZero = vec4(greaterThanEqual(b, vec4(0.)));
  return (bGTEZero * a) + ((vec4(1.0) - bGTEZero) * (a * (b + vec4(1.0))));
`;
export const eluGrad = (args) => {
    const { inputs, backend } = args;
    const { dy, y } = inputs;
    const program = env().getBool('WEBGL_PACK_BINARY_OPERATIONS') ?
        new BinaryOpPackedProgram(ELU_DER_PACKED, dy.shape, y.shape) :
        new BinaryOpProgram(ELU_DER, dy.shape, y.shape);
    return backend.runWebGLProgram(program, [dy, y], dy.dtype);
};
export const eluGradConfig = {
    kernelName: EluGrad,
    backendName: 'webgl',
    kernelFunc: eluGrad
};
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