/**
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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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import {GPGPUProgram} from './gpgpu_math';
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import {getCoordsDataType} from './shader_compiler';
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export class SelectProgram implements GPGPUProgram {
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variableNames = ['c', 'a', 'b'];
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outputShape: number[];
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userCode: string;
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constructor(cRank: number, shape: number[], rank: number) {
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this.outputShape = shape;
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let cCoords;
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let abCoords;
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if (rank > 4) {
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throw Error(`Where for rank ${rank} is not yet supported`);
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}
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if (rank === 1) {
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abCoords = `resRC`;
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cCoords = `resRC`;
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} else {
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const currentCoords = ['resRC.x', 'resRC.y', 'resRC.z', 'resRC.w'];
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const cCoordVars = [];
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const abCoordVars = [];
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for (let i = 0; i < shape.length; i++) {
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abCoordVars.push(`${currentCoords[i]}`);
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if (i < cRank) {
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cCoordVars.push(`${currentCoords[i]}`);
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}
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}
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cCoords = cCoordVars.join();
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abCoords = abCoordVars.join();
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}
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const dtype = getCoordsDataType(rank);
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this.userCode = `
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void main() {
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${dtype} resRC = getOutputCoords();
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float cVal = getC(${cCoords});
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if (cVal >= 1.0) {
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setOutput(getA(${abCoords}));
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} else {
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setOutput(getB(${abCoords}));
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}
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}
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`;
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}
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}
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