/**
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* @license
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* Copyright 2018 Google LLC. 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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export const LINEAR = `return x;`;
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export const LOG = `
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vec4 result = log(x);
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vec4 isNaN = vec4(lessThan(x, vec4(0.0)));
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result.r = isNaN.r == 1.0 ? NAN : result.r;
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result.g = isNaN.g == 1.0 ? NAN : result.g;
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result.b = isNaN.b == 1.0 ? NAN : result.b;
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result.a = isNaN.a == 1.0 ? NAN : result.a;
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return result;
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`;
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export const RELU = `
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vec4 result = x * vec4(greaterThanEqual(x, vec4(0.0)));
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bvec4 isNaN = isnan(x);
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result.r = isNaN.r ? x.r : result.r;
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result.g = isNaN.g ? x.g : result.g;
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result.b = isNaN.b ? x.b : result.b;
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result.a = isNaN.a ? x.a : result.a;
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return result;
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`;
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export const RELU6 = `
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vec4 result = min(x, vec4(6.)) * vec4(greaterThanEqual(x, vec4(0.0)));
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bvec4 isNaN = isnan(x);
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result.r = isNaN.r ? x.r : result.r;
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result.g = isNaN.g ? x.g : result.g;
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result.b = isNaN.b ? x.b : result.b;
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result.a = isNaN.a ? x.a : result.a;
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return result;
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`;
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export const ELU = `
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vec4 result;
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result.r = (x.r >= 0.0) ? x.r : (exp(x.r) - 1.0);
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result.g = (x.g >= 0.0) ? x.g : (exp(x.g) - 1.0);
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result.b = (x.b >= 0.0) ? x.b : (exp(x.b) - 1.0);
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result.a = (x.a >= 0.0) ? x.a : (exp(x.a) - 1.0);
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return result;
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`;
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export class UnaryOpPackedProgram implements GPGPUProgram {
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variableNames = ['A'];
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userCode: string;
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outputShape: number[];
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packedInputs = true;
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packedOutput = true;
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constructor(aShape: number[], opSnippet: string) {
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this.outputShape = aShape;
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this.userCode = `
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vec4 unaryOperation(vec4 x) {
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${opSnippet}
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}
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void main() {
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vec4 x = getAAtOutCoords();
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vec4 y = unaryOperation(x);
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setOutput(y);
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}
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`;
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}
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}
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