@tensorflow/tfjs-backend-wasm
Version:
This package adds a WebAssembly backend to TensorFlow.js. It currently supports the following models from our [models](https://github.com/tensorflow/tfjs-models) repo: - BlazeFace - BodyPix - CocoSSD - Face landmarks detection - HandPose - KNN classifier
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JavaScript
/**
* @license
* Copyright 2019 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 { _FusedMatMul, broadcast_util } from '@tensorflow/tfjs-core';
import { FusableActivation } from './types';
let wasmFusedMatMul;
function setup(backend) {
wasmFusedMatMul = backend.wasm.cwrap(_FusedMatMul, null /* void */, [
'number',
'array',
'number',
'number',
'array',
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number' // out_id
]);
}
function fusedBatchMatMul(args) {
const { inputs, backend, attrs } = args;
const { a, b, bias, preluActivationWeights } = inputs;
if (a.dtype !== 'float32' || b.dtype !== 'float32') {
throw new Error(`_FusedMatMul for non non-float32 tensors not yet supported.`);
}
const { transposeA, transposeB, activation, leakyreluAlpha } = attrs;
const aId = backend.dataIdMap.get(a.dataId).id;
const bId = backend.dataIdMap.get(b.dataId).id;
let biasId = 0;
if (bias != null) {
const biasData = backend.dataIdMap.get(bias.dataId);
if (biasData.shape.length !== 1) {
throw new Error(`_FusedMatMul only supports rank-1 bias but got ` +
`rank ${biasData.shape.length}.`);
}
biasId = biasData.id;
}
const preluActivationWeightsId = preluActivationWeights == null ?
0 :
backend.dataIdMap.get(preluActivationWeights.dataId).id;
const fusedActivation = FusableActivation[activation];
if (fusedActivation == null) {
throw new Error(`${activation} activation not yet supported for FusedConv2D ` +
`in the wasm backend.`);
}
const leftDim = transposeA ? a.shape[2] : a.shape[1];
const rightDim = transposeB ? b.shape[1] : b.shape[2];
const batchDims = broadcast_util.assertAndGetBroadcastShape(a.shape.slice(0, -2), b.shape.slice(0, -2));
const out = backend.makeOutput([...batchDims, leftDim, rightDim], a.dtype);
const outId = backend.dataIdMap.get(out.dataId).id;
const aShapeBytes = new Uint8Array(new Int32Array(a.shape).buffer);
const bShapeBytes = new Uint8Array(new Int32Array(b.shape).buffer);
wasmFusedMatMul(aId, aShapeBytes, a.shape.length, bId, bShapeBytes, b.shape.length, transposeA, transposeB, fusedActivation, biasId, preluActivationWeightsId, leakyreluAlpha || 0, outId);
return out;
}
export const _fusedMatMulConfig = {
kernelName: _FusedMatMul,
backendName: 'wasm',
setupFunc: setup,
kernelFunc: fusedBatchMatMul
};
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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 {_FusedMatMul, _FusedMatMulAttrs, _FusedMatMulInputs, broadcast_util, KernelConfig, KernelFunc} from '@tensorflow/tfjs-core';\n\nimport {BackendWasm} from '../backend_wasm';\n\nimport {FusableActivation} from './types';\n\nlet wasmFusedMatMul:\n    (aId: number, aShape: Uint8Array, aShapeSize: number, bId: number,\n     bShape: Uint8Array, bShapeSize: number, transposeA: boolean,\n     transposeB: boolean, activation: number, biasId: number,\n     preluActivationWeightsId: number, leakyreluAlpha: number, outId: number) =>\n        void;\n\nfunction setup(backend: BackendWasm) {\n  wasmFusedMatMul = backend.wasm.cwrap(_FusedMatMul, null /* void */, [\n    'number',  // a_id\n    'array',   // a_shape\n    'number',  // a_shape.length\n    'number',  // b_id\n    'array',   // b_shape\n    'number',  // b_shape.length\n    'number',  // transpose_a\n    'number',  // transpose_b\n    'number',  // activation\n    'number',  // biasId\n    'number',  // preluActivationWeightsId\n    'number',  // leakyreluAlpha\n    'number'   // out_id\n  ]);\n}\n\nfunction fusedBatchMatMul(args: {\n  inputs: _FusedMatMulInputs,\n  backend: BackendWasm,\n  attrs: _FusedMatMulAttrs\n}) {\n  const {inputs, backend, attrs} = args;\n  const {a, b, bias, preluActivationWeights} = inputs;\n\n  if (a.dtype !== 'float32' || b.dtype !== 'float32') {\n    throw new Error(\n        `_FusedMatMul for non non-float32 tensors not yet supported.`);\n  }\n\n  const {transposeA, transposeB, activation, leakyreluAlpha} = attrs;\n  const aId = backend.dataIdMap.get(a.dataId).id;\n  const bId = backend.dataIdMap.get(b.dataId).id;\n\n  let biasId = 0;\n  if (bias != null) {\n    const biasData = backend.dataIdMap.get(bias.dataId);\n    if (biasData.shape.length !== 1) {\n      throw new Error(\n          `_FusedMatMul only supports rank-1 bias but got ` +\n          `rank ${biasData.shape.length}.`);\n    }\n    biasId = biasData.id;\n  }\n  const preluActivationWeightsId = preluActivationWeights == null ?\n      0 :\n      backend.dataIdMap.get(preluActivationWeights.dataId).id;\n  const fusedActivation =\n      FusableActivation[activation as unknown as\n                        keyof typeof FusableActivation];\n  if (fusedActivation == null) {\n    throw new Error(\n        `${activation} activation not yet supported for FusedConv2D ` +\n        `in the wasm backend.`);\n  }\n\n  const leftDim = transposeA ? a.shape[2] : a.shape[1];\n  const rightDim = transposeB ? b.shape[1] : b.shape[2];\n  const batchDims = broadcast_util.assertAndGetBroadcastShape(\n      a.shape.slice(0, -2), b.shape.slice(0, -2));\n\n  const out = backend.makeOutput([...batchDims, leftDim, rightDim], a.dtype);\n  const outId = backend.dataIdMap.get(out.dataId).id;\n\n  const aShapeBytes = new Uint8Array(new Int32Array(a.shape).buffer);\n  const bShapeBytes = new Uint8Array(new Int32Array(b.shape).buffer);\n\n  wasmFusedMatMul(\n      aId, aShapeBytes, a.shape.length, bId, bShapeBytes, b.shape.length,\n      transposeA, transposeB, fusedActivation, biasId, preluActivationWeightsId,\n      leakyreluAlpha || 0, outId);\n\n  return out;\n}\n\nexport const _fusedMatMulConfig: KernelConfig = {\n  kernelName: _FusedMatMul,\n  backendName: 'wasm',\n  setupFunc: setup,\n  kernelFunc: fusedBatchMatMul as unknown as KernelFunc\n};\n"]}