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Abs.ts
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Abs.ts
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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 {Abs, AbsInputs, KernelConfig, KernelFunc, TypedArray, util} from '@tensorflow/tfjs-core';
import {MathBackendCPU} from '../backend_cpu';
import {assertNotComplex} from '../cpu_util';
export function simpleAbsImpl(vals: TypedArray): Float32Array {
const resultValues = new Float32Array(vals.length);
for (let i = 0; i < vals.length; ++i) {
resultValues[i] = Math.abs(vals[i]);
}
return resultValues;
}
export const abs = (args: {inputs: AbsInputs, backend: MathBackendCPU}) => {
const {x} = args.inputs;
const cpuBackend = args.backend;
assertNotComplex(x, 'abs');
let resultValues = new Float32Array(util.sizeFromShape(x.shape));
const values = cpuBackend.data.get(x.dataId).values as TypedArray;
resultValues = simpleAbsImpl(values);
return cpuBackend.makeOutput(resultValues, x.shape, x.dtype);
};
export const absConfig: KernelConfig = {
kernelName: Abs,
backendName: 'cpu',
kernelFunc: abs as unknown as KernelFunc,
};