/**
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* @license
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* Copyright 2020 Google LLC. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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import { backend_util, util } from '@tensorflow/tfjs-core';
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import { assertNotComplex } from '../cpu_util';
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import { cast } from '../kernels/Cast';
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import { complex } from '../kernels/Complex';
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/**
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* Template that creates a `KernelFunc` for binary ops.
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* @param name Kernel name.
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* @param binaryKernelImpl A `SimpleBinaryKernelImpl` for the kernel.
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* @param binaryKernelComplexImpl Optional. If exists, represents a
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* `ComplexBinaryKernelImpl` for the kernel, will be used when input dtype
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* is `complex64`.
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* @param dtype Optional. If set, the result has this dtype. Otherwise, the
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* result has the same dtype as the first input. This is mainly used in
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* comparison kernels, such as Equal, Less, Greater, etc.
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*/
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export function binaryKernelFunc(name, simpleImpl, complexImpl, dtype) {
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if (complexImpl == null) {
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return ({ inputs, backend }) => {
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const { a, b } = inputs;
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const cpuBackend = backend;
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assertNotComplex([a, b], name);
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const aVals = cpuBackend.data.get(a.dataId).values;
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const bVals = cpuBackend.data.get(b.dataId).values;
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const decodedAVals = a.dtype === 'string' ?
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// tslint:disable-next-line: no-any
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backend_util.fromUint8ToStringArray(aVals) :
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aVals;
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const decodedBVals = a.dtype === 'string' ?
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// tslint:disable-next-line: no-any
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backend_util.fromUint8ToStringArray(bVals) :
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bVals;
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const $dtype = dtype || a.dtype;
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const [resultData, resultShape] = simpleImpl(a.shape, b.shape, decodedAVals, decodedBVals, $dtype);
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return cpuBackend.makeTensorInfo(resultShape, $dtype, resultData);
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};
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}
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return ({ inputs, backend }) => {
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const { a, b } = inputs;
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const cpuBackend = backend;
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if (a.dtype === 'complex64' || b.dtype === 'complex64') {
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const $aComplex = cast({ inputs: { x: a }, backend: cpuBackend, attrs: { dtype: 'complex64' } });
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const $aComplexVals = cpuBackend.data.get($aComplex.dataId);
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const aReal = $aComplexVals.complexTensorInfos.real;
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const aImag = $aComplexVals.complexTensorInfos.imag;
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const aRealVals = cpuBackend.data.get(aReal.dataId).values;
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const aImagVals = cpuBackend.data.get(aImag.dataId).values;
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const $bComplex = cast({ inputs: { x: b }, backend: cpuBackend, attrs: { dtype: 'complex64' } });
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const $bComplexVals = cpuBackend.data.get($bComplex.dataId);
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const bReal = $bComplexVals.complexTensorInfos.real;
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const bImag = $bComplexVals.complexTensorInfos.imag;
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const bRealVals = cpuBackend.data.get(bReal.dataId).values;
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const bImagVals = cpuBackend.data.get(bImag.dataId).values;
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const [resultRealData, resultImagData, resultShape] = complexImpl(a.shape, b.shape, aRealVals, aImagVals, bRealVals, bImagVals);
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const resultReal = cpuBackend.makeTensorInfo(resultShape, 'float32', resultRealData);
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const resultImag = cpuBackend.makeTensorInfo(resultShape, 'float32', resultImagData);
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const result = complex({ inputs: { real: resultReal, imag: resultImag }, backend: cpuBackend });
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cpuBackend.disposeIntermediateTensorInfo($aComplex);
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cpuBackend.disposeIntermediateTensorInfo($bComplex);
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cpuBackend.disposeIntermediateTensorInfo(resultReal);
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cpuBackend.disposeIntermediateTensorInfo(resultImag);
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return result;
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}
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else {
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const aVals = cpuBackend.data.get(a.dataId).values;
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const bVals = cpuBackend.data.get(b.dataId).values;
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const $dtype = dtype || a.dtype;
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const [resultData, resultShape] = simpleImpl(a.shape, b.shape, aVals, bVals, $dtype);
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return cpuBackend.makeTensorInfo(resultShape, $dtype, resultData);
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}
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};
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}
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/**
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* Template that creates the complex type implementation for binary ops.
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* Supports broadcast.
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*/
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export function createComplexBinaryKernelImpl(op) {
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return (aShape, bShape, aRealVals, aImagVals, bRealVals, bImagVals) => {
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const resultShape = backend_util.assertAndGetBroadcastShape(aShape, bShape);
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const resultSize = util.sizeFromShape(resultShape);
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const resultRank = resultShape.length;
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const resultStrides = util.computeStrides(resultShape);
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const resultRealVals = util.getTypedArrayFromDType('float32', resultSize);
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const resultImagVals = util.getTypedArrayFromDType('float32', resultSize);
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const aBroadcastDims = backend_util.getBroadcastDims(aShape, resultShape);
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const bBroadcastDims = backend_util.getBroadcastDims(bShape, resultShape);
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const aVals = backend_util.mergeRealAndImagArrays(aRealVals, aImagVals);
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const bVals = backend_util.mergeRealAndImagArrays(bRealVals, bImagVals);
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const aRank = aShape.length;
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const aStrides = util.computeStrides(aShape);
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const bRank = bShape.length;
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const bStrides = util.computeStrides(bShape);
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if (aBroadcastDims.length + bBroadcastDims.length === 0) {
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for (let i = 0; i < resultRealVals.length; i++) {
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const aIdx = i % aVals.length;
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const bIdx = i % bVals.length;
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const result = op(aVals[aIdx * 2], aVals[aIdx * 2 + 1], bVals[bIdx * 2], bVals[bIdx * 2 + 1]);
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resultRealVals[i] = result.real;
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resultImagVals[i] = result.imag;
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}
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}
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else {
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for (let i = 0; i < resultRealVals.length; i++) {
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const loc = util.indexToLoc(i, resultRank, resultStrides);
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const aLoc = loc.slice(-aRank);
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aBroadcastDims.forEach(d => aLoc[d] = 0);
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const aIndex = util.locToIndex(aLoc, aRank, aStrides);
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const bLoc = loc.slice(-bRank);
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bBroadcastDims.forEach(d => bLoc[d] = 0);
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const bIndex = util.locToIndex(bLoc, bRank, bStrides);
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const opResult = op(aVals[aIndex * 2], aVals[aIndex * 2 + 1], bVals[bIndex * 2], bVals[bIndex * 2 + 1]);
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resultRealVals[i] = opResult.real;
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resultImagVals[i] = opResult.imag;
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}
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}
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return [resultRealVals, resultImagVals, resultShape];
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};
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}
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* @license\n * Copyright 2020 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport {backend_util, BinaryInputs, DataType, KernelFunc, TypedArray, util} from '@tensorflow/tfjs-core';\n\nimport {MathBackendCPU} from '../backend_cpu';\nimport {assertNotComplex} from '../cpu_util';\nimport {cast} from '../kernels/Cast';\nimport {complex} from '../kernels/Complex';\n\nimport {ComplexBinaryKernelImpl, ComplexBinaryOperation, SimpleBinaryKernelImpl} from './binary_types';\n\n/**\n * Template that creates a `KernelFunc` for binary ops.\n * @param name Kernel name.\n * @param binaryKernelImpl A `SimpleBinaryKernelImpl` for the kernel.\n * @param binaryKernelComplexImpl Optional. If exists, represents a\n *     `ComplexBinaryKernelImpl` for the kernel, will be used when input dtype\n *     is `complex64`.\n * @param dtype Optional. If set, the result has this dtype. Otherwise, the\n *     result has the same dtype as the first input. This is mainly used in\n *     comparison kernels, such as Equal, Less, Greater, etc.\n */\nexport function binaryKernelFunc(\n    name: string, simpleImpl: SimpleBinaryKernelImpl,\n    complexImpl?: ComplexBinaryKernelImpl, dtype?: DataType): KernelFunc {\n  if (complexImpl == null) {\n    return ({inputs, backend}) => {\n      const {a, b} = inputs as BinaryInputs;\n      const cpuBackend = backend as MathBackendCPU;\n\n      assertNotComplex([a, b], name);\n\n      const aVals = cpuBackend.data.get(a.dataId).values as TypedArray;\n      const bVals = cpuBackend.data.get(b.dataId).values as TypedArray;\n\n      const decodedAVals = a.dtype === 'string' ?\n          // tslint:disable-next-line: no-any\n          backend_util.fromUint8ToStringArray(aVals as any as Uint8Array[]) :\n          aVals;\n      const decodedBVals = a.dtype === 'string' ?\n          // tslint:disable-next-line: no-any\n          backend_util.fromUint8ToStringArray(bVals as any as Uint8Array[]) :\n          bVals;\n      const $dtype = dtype || a.dtype;\n\n      const [resultData, resultShape] =\n          simpleImpl(a.shape, b.shape, decodedAVals, decodedBVals, $dtype);\n\n      return cpuBackend.makeTensorInfo(resultShape, $dtype, resultData);\n    };\n  }\n\n  return ({inputs, backend}) => {\n    const {a, b} = inputs as BinaryInputs;\n    const cpuBackend = backend as MathBackendCPU;\n\n    if (a.dtype === 'complex64' || b.dtype === 'complex64') {\n      const $aComplex = cast(\n          {inputs: {x: a}, backend: cpuBackend, attrs: {dtype: 'complex64'}});\n\n      const $aComplexVals = cpuBackend.data.get($aComplex.dataId);\n\n      const aReal = $aComplexVals.complexTensorInfos.real;\n      const aImag = $aComplexVals.complexTensorInfos.imag;\n\n      const aRealVals =\n          cpuBackend.data.get(aReal.dataId).values as Float32Array;\n      const aImagVals =\n          cpuBackend.data.get(aImag.dataId).values as Float32Array;\n\n      const $bComplex = cast(\n          {inputs: {x: b}, backend: cpuBackend, attrs: {dtype: 'complex64'}});\n\n      const $bComplexVals = cpuBackend.data.get($bComplex.dataId);\n\n      const bReal = $bComplexVals.complexTensorInfos.real;\n      const bImag = $bComplexVals.complexTensorInfos.imag;\n\n      const bRealVals =\n          cpuBackend.data.get(bReal.dataId).values as Float32Array;\n      const bImagVals =\n          cpuBackend.data.get(bImag.dataId).values as Float32Array;\n\n      const [resultRealData, resultImagData, resultShape] = complexImpl(\n          a.shape, b.shape, aRealVals, aImagVals, bRealVals, bImagVals);\n\n      const resultReal =\n          cpuBackend.makeTensorInfo(resultShape, 'float32', resultRealData);\n\n      const resultImag =\n          cpuBackend.makeTensorInfo(resultShape, 'float32', resultImagData);\n\n      const result = complex(\n          {inputs: {real: resultReal, imag: resultImag}, backend: cpuBackend});\n\n      cpuBackend.disposeIntermediateTensorInfo($aComplex);\n      cpuBackend.disposeIntermediateTensorInfo($bComplex);\n      cpuBackend.disposeIntermediateTensorInfo(resultReal);\n      cpuBackend.disposeIntermediateTensorInfo(resultImag);\n\n      return result;\n    } else {\n      const aVals = cpuBackend.data.get(a.dataId).values as TypedArray;\n      const bVals = cpuBackend.data.get(b.dataId).values as TypedArray;\n\n      const $dtype = dtype || a.dtype;\n\n      const [resultData, resultShape] =\n          simpleImpl(a.shape, b.shape, aVals, bVals, $dtype);\n\n      return cpuBackend.makeTensorInfo(resultShape, $dtype, resultData);\n    }\n  };\n}\n\n/**\n * Template that creates the complex type implementation for binary ops.\n * Supports broadcast.\n */\nexport function createComplexBinaryKernelImpl(op: ComplexBinaryOperation):\n    ComplexBinaryKernelImpl {\n  return (aShape: number[], bShape: number[], aRealVals: Float32Array,\n          aImagVals: Float32Array, bRealVals: Float32Array,\n          bImagVals: Float32Array): [TypedArray, TypedArray, number[]] => {\n    const resultShape = backend_util.assertAndGetBroadcastShape(aShape, bShape);\n    const resultSize = util.sizeFromShape(resultShape);\n    const resultRank = resultShape.length;\n    const resultStrides = util.computeStrides(resultShape);\n\n    const resultRealVals = util.getTypedArrayFromDType('float32', resultSize);\n    const resultImagVals = util.getTypedArrayFromDType('float32', resultSize);\n\n    const aBroadcastDims = backend_util.getBroadcastDims(aShape, resultShape);\n    const bBroadcastDims = backend_util.getBroadcastDims(bShape, resultShape);\n\n    const aVals = backend_util.mergeRealAndImagArrays(aRealVals, aImagVals);\n    const bVals = backend_util.mergeRealAndImagArrays(bRealVals, bImagVals);\n\n    const aRank = aShape.length;\n    const aStrides = util.computeStrides(aShape);\n\n    const bRank = bShape.length;\n    const bStrides = util.computeStrides(bShape);\n\n    if (aBroadcastDims.length + bBroadcastDims.length === 0) {\n      for (let i = 0; i < resultRealVals.length; i++) {\n        const aIdx = i % aVals.length;\n        const bIdx = i % bVals.length;\n\n        const result =\n            op(aVals[aIdx * 2], aVals[aIdx * 2 + 1], bVals[bIdx * 2],\n               bVals[bIdx * 2 + 1]);\n\n        resultRealVals[i] = result.real;\n        resultImagVals[i] = result.imag;\n      }\n    } else {\n      for (let i = 0; i < resultRealVals.length; i++) {\n        const loc = util.indexToLoc(i, resultRank, resultStrides);\n\n        const aLoc = loc.slice(-aRank);\n        aBroadcastDims.forEach(d => aLoc[d] = 0);\n        const aIndex = util.locToIndex(aLoc, aRank, aStrides);\n\n        const bLoc = loc.slice(-bRank);\n        bBroadcastDims.forEach(d => bLoc[d] = 0);\n        const bIndex = util.locToIndex(bLoc, bRank, bStrides);\n\n        const opResult =\n            op(aVals[aIndex * 2], aVals[aIndex * 2 + 1], bVals[bIndex * 2],\n               bVals[bIndex * 2 + 1]);\n\n        resultRealVals[i] = opResult.real;\n        resultImagVals[i] = opResult.imag;\n      }\n    }\n    return [resultRealVals, resultImagVals, resultShape];\n  };\n}\n"]}
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