"use strict";
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/**
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* @license
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* Copyright 2017 Google Inc. 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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Object.defineProperty(exports, "__esModule", { value: true });
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var shader_compiler_1 = require("./shader_compiler");
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var GatherProgram = /** @class */ (function () {
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function GatherProgram(aShape, indicesLength, axis) {
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this.variableNames = ['A', 'indices'];
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var outputShape = aShape.slice();
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outputShape[axis] = indicesLength;
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this.outputShape = outputShape;
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this.rank = outputShape.length;
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var dtype = shader_compiler_1.getCoordsDataType(this.rank);
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var sourceCoords = getSourceCoords(aShape, axis);
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this.userCode = "\n void main() {\n " + dtype + " resRC = getOutputCoords();\n setOutput(getA(" + sourceCoords + "));\n }\n ";
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}
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return GatherProgram;
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}());
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exports.GatherProgram = GatherProgram;
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function getSourceCoords(aShape, axis) {
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var rank = aShape.length;
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if (rank > 4) {
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throw Error("Gather for rank " + rank + " is not yet supported");
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}
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if (rank === 1) {
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return "int(getIndices(resRC))";
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}
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var currentCoords = ['resRC.x', 'resRC.y', 'resRC.z', 'resRC.w'];
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var sourceCoords = [];
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for (var i = 0; i < aShape.length; i++) {
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if (i === axis) {
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sourceCoords.push("int(getIndices(" + currentCoords[i] + "))");
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}
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else {
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sourceCoords.push("" + currentCoords[i]);
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}
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}
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return sourceCoords.join();
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}
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//# sourceMappingURL=gather_gpu.js.map
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