@tensorflow/tfjs-core
Version:
Hardware-accelerated JavaScript library for machine intelligence
54 lines • 2.17 kB
JavaScript
;
/**
* @license
* Copyright 2017 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 GatherProgram = /** @class */ (function () {
function GatherProgram(aShape, indicesLength, axis) {
this.variableNames = ['A', 'indices'];
var outputShape = aShape.slice();
outputShape[axis] = indicesLength;
this.outputShape = outputShape;
this.rank = outputShape.length;
var dtype = shader_compiler_1.getCoordsDataType(this.rank);
var sourceCoords = getSourceCoords(aShape, axis);
this.userCode = "\n void main() {\n " + dtype + " resRC = getOutputCoords();\n setOutput(getA(" + sourceCoords + "));\n }\n ";
}
return GatherProgram;
}());
exports.GatherProgram = GatherProgram;
function getSourceCoords(aShape, axis) {
var rank = aShape.length;
if (rank > 4) {
throw Error("Gather for rank " + rank + " is not yet supported");
}
if (rank === 1) {
return "int(getIndices(resRC))";
}
var currentCoords = ['resRC.x', 'resRC.y', 'resRC.z', 'resRC.w'];
var sourceCoords = [];
for (var i = 0; i < aShape.length; i++) {
if (i === axis) {
sourceCoords.push("int(getIndices(" + currentCoords[i] + "))");
}
else {
sourceCoords.push("" + currentCoords[i]);
}
}
return sourceCoords.join();
}
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