/**
|
* @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.
|
* =============================================================================
|
*/
|
|
import {GPGPUProgram} from './gpgpu_math';
|
import {getCoordsDataType} from './shader_compiler';
|
|
export class TileProgram implements GPGPUProgram {
|
variableNames = ['A'];
|
outputShape: number[];
|
userCode: string;
|
rank: number;
|
|
constructor(aShape: number[], reps: number[]) {
|
const outputShape: number[] = new Array(aShape.length);
|
for (let i = 0; i < outputShape.length; i++) {
|
outputShape[i] = aShape[i] * reps[i];
|
}
|
this.outputShape = outputShape;
|
this.rank = outputShape.length;
|
const dtype = getCoordsDataType(this.rank);
|
const sourceCoords = getSourceCoords(aShape);
|
|
this.userCode = `
|
void main() {
|
${dtype} resRC = getOutputCoords();
|
setOutput(getA(${sourceCoords}));
|
}
|
`;
|
}
|
}
|
|
function getSourceCoords(aShape: number[]): string {
|
const rank = aShape.length;
|
if (rank > 5) {
|
throw Error(`Tile for rank ${rank} is not yet supported`);
|
}
|
if (rank === 1) {
|
return `imod(resRC, ${aShape[0]})`;
|
}
|
|
const currentCoords = ['resRC.x', 'resRC.y', 'resRC.z', 'resRC.w', 'resRC.u'];
|
|
const sourceCoords = [];
|
for (let i = 0; i < aShape.length; i++) {
|
sourceCoords.push(`imod(${currentCoords[i]}, ${aShape[i]})`);
|
}
|
return sourceCoords.join();
|
}
|