/** * @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 { backend_util, env, util } from '@tensorflow/tfjs-core'; import { ArgMinMaxProgram } from '../argminmax_gpu'; import { ArgMinMaxPackedProgram } from '../argminmax_packed_gpu'; import { reshape } from '../kernels/Reshape'; function argReduce(backend, x, reduceType, bestIndicesA = null) { let batchSize = x.shape[0]; let inSize = x.shape[1]; if (bestIndicesA != null) { batchSize = bestIndicesA.shape[0]; inSize = bestIndicesA.shape[1]; } const windowSize = backend_util.computeOptimalWindowSize(inSize); const reduceInfo = { windowSize, inSize, batchSize, outSize: Math.ceil(inSize / windowSize) }; const program = new ArgMinMaxProgram(reduceInfo, reduceType, bestIndicesA == null); const inputs = [x]; if (bestIndicesA != null) { inputs.push(bestIndicesA); } const output = backend.runWebGLProgram(program, inputs, 'int32'); // No need to run another GPGPU program. if (output.shape[1] === 1) { return output; } const result = argReduce(backend, x, reduceType, output); backend.disposeIntermediateTensorInfo(output); return result; } function argReducePacked(backend, x, reduceType, bestIndicesA = null) { const inShape = bestIndicesA != null ? bestIndicesA.shape : x.shape; const inSize = inShape[inShape.length - 1]; const windowSize = backend_util.computeOptimalWindowSize(inSize); const program = new ArgMinMaxPackedProgram(inShape, windowSize, reduceType, bestIndicesA == null); const inputs = bestIndicesA == null ? [x] : [x, bestIndicesA]; const output = backend.runWebGLProgram(program, inputs, 'int32'); if (output.shape.length === x.shape.length) { const result = argReducePacked(backend, x, reduceType, output); backend.disposeIntermediateTensorInfo(output); return result; } return output; } export function argMinMaxReduce(backend, x, axis, reduceType) { const axes = [axis]; backend_util.assertAxesAreInnerMostDims('arg' + reduceType.charAt(0).toUpperCase() + reduceType.slice(1), axes, x.shape.length); if (!env().getBool('WEBGL_PACK_REDUCE') || x.shape.length <= 2) { const intermediateTensorInfos = []; // Eagerly unpack x input since it is passed in to all the shaders which // require unpacked inputs. const xtexData = backend.texData.get(x.dataId); const xIsPacked = xtexData !== null && xtexData.isPacked; let xUnPacked = x; if (xIsPacked) { xUnPacked = backend.unpackTensor(x); intermediateTensorInfos.push(xUnPacked); } const [outShape, reduceShape] = backend_util.computeOutAndReduceShapes(xUnPacked.shape, axes); 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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, env, TensorInfo, util} from '@tensorflow/tfjs-core';\n\nimport {ArgMinMaxProgram} from '../argminmax_gpu';\nimport {ArgMinMaxPackedProgram} from '../argminmax_packed_gpu';\nimport {MathBackendWebGL} from '../backend_webgl';\nimport {reshape} from '../kernels/Reshape';\n\nfunction argReduce(\n    backend: MathBackendWebGL, x: TensorInfo, reduceType: 'max'|'min',\n    bestIndicesA: TensorInfo = null): TensorInfo {\n  let batchSize = x.shape[0];\n  let inSize = x.shape[1];\n  if (bestIndicesA != null) {\n    batchSize = bestIndicesA.shape[0];\n    inSize = bestIndicesA.shape[1];\n  }\n  const windowSize = backend_util.computeOptimalWindowSize(inSize);\n  const reduceInfo =\n      {windowSize, inSize, batchSize, outSize: Math.ceil(inSize / windowSize)};\n  const program =\n      new ArgMinMaxProgram(reduceInfo, reduceType, bestIndicesA == null);\n  const inputs = [x];\n  if (bestIndicesA != null) {\n    inputs.push(bestIndicesA);\n  }\n  const output = backend.runWebGLProgram(program, inputs, 'int32');\n  // No need to run another GPGPU program.\n  if (output.shape[1] === 1) {\n    return output;\n  }\n  const result = argReduce(backend, x, reduceType, output);\n  backend.disposeIntermediateTensorInfo(output);\n  return result;\n}\n\nfunction argReducePacked(\n    backend: MathBackendWebGL, x: TensorInfo, reduceType: 'max'|'min',\n    bestIndicesA: TensorInfo = null): TensorInfo {\n  const inShape = bestIndicesA != null ? bestIndicesA.shape : x.shape;\n  const inSize = inShape[inShape.length - 1];\n  const windowSize = backend_util.computeOptimalWindowSize(inSize);\n  const program = new ArgMinMaxPackedProgram(\n      inShape, windowSize, reduceType, bestIndicesA == null);\n  const inputs = bestIndicesA == null ? [x] : [x, bestIndicesA];\n  const output = backend.runWebGLProgram(program, inputs, 'int32');\n  if (output.shape.length === x.shape.length) {\n    const result = argReducePacked(backend, x, reduceType, output);\n    backend.disposeIntermediateTensorInfo(output);\n    return result;\n  }\n  return output;\n}\n\nexport function argMinMaxReduce(\n    backend: MathBackendWebGL, x: TensorInfo, axis: number,\n    reduceType: 'min'|'max'): TensorInfo {\n  const axes = [axis];\n  backend_util.assertAxesAreInnerMostDims(\n      'arg' + reduceType.charAt(0).toUpperCase() + reduceType.slice(1), axes,\n      x.shape.length);\n  if (!env().getBool('WEBGL_PACK_REDUCE') || x.shape.length <= 2) {\n    const intermediateTensorInfos = [];\n    // Eagerly unpack x input since it is passed in to all the shaders which\n    // require unpacked inputs.\n    const xtexData = backend.texData.get(x.dataId);\n    const xIsPacked = xtexData !== null && xtexData.isPacked;\n    let xUnPacked = x;\n    if (xIsPacked) {\n      xUnPacked = backend.unpackTensor(x);\n      intermediateTensorInfos.push(xUnPacked);\n    }\n\n    const [outShape, reduceShape] =\n        backend_util.computeOutAndReduceShapes(xUnPacked.shape, axes);\n    const inSize = util.sizeFromShape(reduceShape);\n    const a2D = reshape(\n        {inputs: {x: xUnPacked}, backend, attrs: {shape: [-1, inSize]}});\n    intermediateTensorInfos.push(a2D);\n\n    const reduced = argReduce(backend, a2D, reduceType);\n    intermediateTensorInfos.push(reduced);\n    const reshaped =\n        reshape({inputs: {x: reduced}, backend, attrs: {shape: outShape}});\n\n    intermediateTensorInfos.forEach(\n        t => backend.disposeIntermediateTensorInfo(t));\n    return reshaped;\n  }\n  return argReducePacked(backend, x, reduceType);\n}\n"]}