@tensorflow/tfjs-core
Version:
Hardware-accelerated JavaScript library for machine intelligence
49 lines • 2.8 kB
JavaScript
;
/**
* @license
* Copyright 2018 Google Inc. 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.
* =============================================================================
*/
Object.defineProperty(exports, "__esModule", { value: true });
var shader_compiler_1 = require("./shader_compiler");
var ScatterProgram = /** @class */ (function () {
function ScatterProgram(updateSize, sliceDim, indicesRank, updatesRank, strides, shape, summingDupeIndex) {
if (summingDupeIndex === void 0) { summingDupeIndex = true; }
this.variableNames = ['updates', 'indices', 'defaultValue'];
this.outputShape = shape;
var stridesType = shader_compiler_1.getCoordsDataType(strides.length);
var dtype = shader_compiler_1.getCoordsDataType(shape.length);
var indicesString = '';
if (indicesRank === 1) {
indicesString = 'i';
}
else if (indicesRank === 2) {
indicesString = 'i, j';
}
var indicesSnippet = "getIndices(" + indicesString + ")";
var updatesString = '';
if (updatesRank === 1) {
updatesString = 'i';
}
else if (updatesRank === 2) {
updatesString = 'i, coords[1]';
}
var updatesSnippet = "getUpdates(" + updatesString + ")";
var strideString = sliceDim > 1 ? 'strides[j]' : 'strides';
this.userCode = "\n " + stridesType + " strides = " + stridesType + "(" + strides + ");\n\n void main() {\n " + dtype + " coords = getOutputCoords();\n float sum = 0.0;\n bool found = false;\n for (int i = 0; i < " + updateSize + "; i++) {\n int flattenedIndex = 0;\n for (int j = 0; j < " + sliceDim + "; j++) {\n int index = round(" + indicesSnippet + ");\n flattenedIndex += index * " + strideString + ";\n }\n if (flattenedIndex == coords[0]) {\n sum += " + updatesSnippet + ";\n found = true;\n }\n }\n setOutput(mix(getDefaultValue(), sum, float(found)));\n }\n ";
}
return ScatterProgram;
}());
exports.ScatterProgram = ScatterProgram;
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