[6732] | 1 | #region License Information
|
---|
| 2 | /* HeuristicLab
|
---|
| 3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
| 4 | *
|
---|
| 5 | * This file is part of HeuristicLab.
|
---|
| 6 | *
|
---|
| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
| 8 | * it under the terms of the GNU General Public License as published by
|
---|
| 9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
| 10 | * (at your option) any later version.
|
---|
| 11 | *
|
---|
| 12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 15 | * GNU General Public License for more details.
|
---|
| 16 | *
|
---|
| 17 | * You should have received a copy of the GNU General Public License
|
---|
| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
| 19 | */
|
---|
| 20 | #endregion
|
---|
| 21 |
|
---|
| 22 | using System;
|
---|
[6741] | 23 | using System.Collections.ObjectModel;
|
---|
| 24 | using System.Linq;
|
---|
[6732] | 25 | using System.Collections.Generic;
|
---|
| 26 | using System.Reflection;
|
---|
| 27 | using System.Reflection.Emit;
|
---|
| 28 | using HeuristicLab.Common;
|
---|
| 29 | using HeuristicLab.Core;
|
---|
[6740] | 30 | using HeuristicLab.Data;
|
---|
[6732] | 31 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
|
---|
[6740] | 32 | using HeuristicLab.Parameters;
|
---|
[6732] | 33 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
|
---|
| 34 |
|
---|
| 35 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
|
---|
| 36 | [StorableClass]
|
---|
| 37 | [Item("SymbolicDataAnalysisExpressionTreeILEmittingInterpreter", "Interpreter for symbolic expression trees.")]
|
---|
| 38 | public sealed class SymbolicDataAnalysisExpressionTreeILEmittingInterpreter : ParameterizedNamedItem, ISymbolicDataAnalysisExpressionTreeInterpreter {
|
---|
[6741] | 39 | private static MethodInfo listGetValue = typeof(IList<double>).GetProperty("Item", new Type[] { typeof(int) }).GetGetMethod();
|
---|
[6732] | 40 | private static MethodInfo cos = typeof(Math).GetMethod("Cos", new Type[] { typeof(double) });
|
---|
| 41 | private static MethodInfo sin = typeof(Math).GetMethod("Sin", new Type[] { typeof(double) });
|
---|
| 42 | private static MethodInfo tan = typeof(Math).GetMethod("Tan", new Type[] { typeof(double) });
|
---|
| 43 | private static MethodInfo exp = typeof(Math).GetMethod("Exp", new Type[] { typeof(double) });
|
---|
| 44 | private static MethodInfo log = typeof(Math).GetMethod("Log", new Type[] { typeof(double) });
|
---|
| 45 | private static MethodInfo power = typeof(Math).GetMethod("Pow", new Type[] { typeof(double), typeof(double) });
|
---|
[6755] | 46 | private static MethodInfo round = typeof(Math).GetMethod("Round", new Type[] { typeof(double) });
|
---|
[6732] | 47 |
|
---|
[6741] | 48 | internal delegate double CompiledFunction(int sampleIndex, IList<double>[] columns);
|
---|
[6732] | 49 | private const string CheckExpressionsWithIntervalArithmeticParameterName = "CheckExpressionsWithIntervalArithmetic";
|
---|
| 50 | #region private classes
|
---|
| 51 | private class InterpreterState {
|
---|
| 52 | private double[] argumentStack;
|
---|
| 53 | private int argumentStackPointer;
|
---|
| 54 | private Instruction[] code;
|
---|
| 55 | private int pc;
|
---|
| 56 | public int ProgramCounter {
|
---|
| 57 | get { return pc; }
|
---|
| 58 | set { pc = value; }
|
---|
| 59 | }
|
---|
| 60 | internal InterpreterState(Instruction[] code, int argumentStackSize) {
|
---|
| 61 | this.code = code;
|
---|
| 62 | this.pc = 0;
|
---|
| 63 | if (argumentStackSize > 0) {
|
---|
| 64 | this.argumentStack = new double[argumentStackSize];
|
---|
| 65 | }
|
---|
| 66 | this.argumentStackPointer = 0;
|
---|
| 67 | }
|
---|
| 68 |
|
---|
| 69 | internal void Reset() {
|
---|
| 70 | this.pc = 0;
|
---|
| 71 | this.argumentStackPointer = 0;
|
---|
| 72 | }
|
---|
| 73 |
|
---|
| 74 | internal Instruction NextInstruction() {
|
---|
| 75 | return code[pc++];
|
---|
| 76 | }
|
---|
| 77 | private void Push(double val) {
|
---|
| 78 | argumentStack[argumentStackPointer++] = val;
|
---|
| 79 | }
|
---|
| 80 | private double Pop() {
|
---|
| 81 | return argumentStack[--argumentStackPointer];
|
---|
| 82 | }
|
---|
| 83 |
|
---|
| 84 | internal void CreateStackFrame(double[] argValues) {
|
---|
| 85 | // push in reverse order to make indexing easier
|
---|
| 86 | for (int i = argValues.Length - 1; i >= 0; i--) {
|
---|
| 87 | argumentStack[argumentStackPointer++] = argValues[i];
|
---|
| 88 | }
|
---|
| 89 | Push(argValues.Length);
|
---|
| 90 | }
|
---|
| 91 |
|
---|
| 92 | internal void RemoveStackFrame() {
|
---|
| 93 | int size = (int)Pop();
|
---|
| 94 | argumentStackPointer -= size;
|
---|
| 95 | }
|
---|
| 96 |
|
---|
| 97 | internal double GetStackFrameValue(ushort index) {
|
---|
| 98 | // layout of stack:
|
---|
| 99 | // [0] <- argumentStackPointer
|
---|
| 100 | // [StackFrameSize = N + 1]
|
---|
| 101 | // [Arg0] <- argumentStackPointer - 2 - 0
|
---|
| 102 | // [Arg1] <- argumentStackPointer - 2 - 1
|
---|
| 103 | // [...]
|
---|
| 104 | // [ArgN] <- argumentStackPointer - 2 - N
|
---|
| 105 | // <Begin of stack frame>
|
---|
| 106 | return argumentStack[argumentStackPointer - index - 2];
|
---|
| 107 | }
|
---|
| 108 | }
|
---|
| 109 | private class OpCodes {
|
---|
| 110 | public const byte Add = 1;
|
---|
| 111 | public const byte Sub = 2;
|
---|
| 112 | public const byte Mul = 3;
|
---|
| 113 | public const byte Div = 4;
|
---|
| 114 |
|
---|
| 115 | public const byte Sin = 5;
|
---|
| 116 | public const byte Cos = 6;
|
---|
| 117 | public const byte Tan = 7;
|
---|
| 118 |
|
---|
| 119 | public const byte Log = 8;
|
---|
| 120 | public const byte Exp = 9;
|
---|
| 121 |
|
---|
| 122 | public const byte IfThenElse = 10;
|
---|
| 123 |
|
---|
| 124 | public const byte GT = 11;
|
---|
| 125 | public const byte LT = 12;
|
---|
| 126 |
|
---|
| 127 | public const byte AND = 13;
|
---|
| 128 | public const byte OR = 14;
|
---|
| 129 | public const byte NOT = 15;
|
---|
| 130 |
|
---|
| 131 |
|
---|
| 132 | public const byte Average = 16;
|
---|
| 133 |
|
---|
| 134 | public const byte Call = 17;
|
---|
| 135 |
|
---|
| 136 | public const byte Variable = 18;
|
---|
| 137 | public const byte LagVariable = 19;
|
---|
| 138 | public const byte Constant = 20;
|
---|
| 139 | public const byte Arg = 21;
|
---|
| 140 |
|
---|
| 141 | public const byte Power = 22;
|
---|
| 142 | public const byte Root = 23;
|
---|
| 143 | public const byte TimeLag = 24;
|
---|
| 144 | public const byte Integral = 25;
|
---|
| 145 | public const byte Derivative = 26;
|
---|
| 146 |
|
---|
| 147 | public const byte VariableCondition = 27;
|
---|
| 148 | }
|
---|
| 149 | #endregion
|
---|
| 150 |
|
---|
| 151 | private Dictionary<Type, byte> symbolToOpcode = new Dictionary<Type, byte>() {
|
---|
| 152 | { typeof(Addition), OpCodes.Add },
|
---|
| 153 | { typeof(Subtraction), OpCodes.Sub },
|
---|
| 154 | { typeof(Multiplication), OpCodes.Mul },
|
---|
| 155 | { typeof(Division), OpCodes.Div },
|
---|
| 156 | { typeof(Sine), OpCodes.Sin },
|
---|
| 157 | { typeof(Cosine), OpCodes.Cos },
|
---|
| 158 | { typeof(Tangent), OpCodes.Tan },
|
---|
| 159 | { typeof(Logarithm), OpCodes.Log },
|
---|
| 160 | { typeof(Exponential), OpCodes.Exp },
|
---|
| 161 | { typeof(IfThenElse), OpCodes.IfThenElse },
|
---|
| 162 | { typeof(GreaterThan), OpCodes.GT },
|
---|
| 163 | { typeof(LessThan), OpCodes.LT },
|
---|
| 164 | { typeof(And), OpCodes.AND },
|
---|
| 165 | { typeof(Or), OpCodes.OR },
|
---|
| 166 | { typeof(Not), OpCodes.NOT},
|
---|
| 167 | { typeof(Average), OpCodes.Average},
|
---|
| 168 | { typeof(InvokeFunction), OpCodes.Call },
|
---|
| 169 | { typeof(HeuristicLab.Problems.DataAnalysis.Symbolic.Variable), OpCodes.Variable },
|
---|
| 170 | { typeof(LaggedVariable), OpCodes.LagVariable },
|
---|
| 171 | { typeof(Constant), OpCodes.Constant },
|
---|
| 172 | { typeof(Argument), OpCodes.Arg },
|
---|
| 173 | { typeof(Power),OpCodes.Power},
|
---|
| 174 | { typeof(Root),OpCodes.Root},
|
---|
| 175 | { typeof(TimeLag), OpCodes.TimeLag},
|
---|
| 176 | { typeof(Integral), OpCodes.Integral},
|
---|
| 177 | { typeof(Derivative), OpCodes.Derivative},
|
---|
| 178 | { typeof(VariableCondition),OpCodes.VariableCondition}
|
---|
| 179 | };
|
---|
| 180 |
|
---|
| 181 | public override bool CanChangeName {
|
---|
| 182 | get { return false; }
|
---|
| 183 | }
|
---|
| 184 | public override bool CanChangeDescription {
|
---|
| 185 | get { return false; }
|
---|
| 186 | }
|
---|
| 187 |
|
---|
| 188 | #region parameter properties
|
---|
| 189 | public IValueParameter<BoolValue> CheckExpressionsWithIntervalArithmeticParameter {
|
---|
| 190 | get { return (IValueParameter<BoolValue>)Parameters[CheckExpressionsWithIntervalArithmeticParameterName]; }
|
---|
| 191 | }
|
---|
| 192 | #endregion
|
---|
| 193 |
|
---|
| 194 | #region properties
|
---|
| 195 | public BoolValue CheckExpressionsWithIntervalArithmetic {
|
---|
| 196 | get { return CheckExpressionsWithIntervalArithmeticParameter.Value; }
|
---|
| 197 | set { CheckExpressionsWithIntervalArithmeticParameter.Value = value; }
|
---|
| 198 | }
|
---|
| 199 | #endregion
|
---|
| 200 |
|
---|
| 201 |
|
---|
| 202 | [StorableConstructor]
|
---|
| 203 | private SymbolicDataAnalysisExpressionTreeILEmittingInterpreter(bool deserializing) : base(deserializing) { }
|
---|
| 204 | private SymbolicDataAnalysisExpressionTreeILEmittingInterpreter(SymbolicDataAnalysisExpressionTreeILEmittingInterpreter original, Cloner cloner) : base(original, cloner) { }
|
---|
| 205 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
| 206 | return new SymbolicDataAnalysisExpressionTreeILEmittingInterpreter(this, cloner);
|
---|
| 207 | }
|
---|
| 208 |
|
---|
| 209 | public SymbolicDataAnalysisExpressionTreeILEmittingInterpreter()
|
---|
| 210 | : base("SymbolicDataAnalysisExpressionTreeILEmittingInterpreter", "Interpreter for symbolic expression trees.") {
|
---|
| 211 | Parameters.Add(new ValueParameter<BoolValue>(CheckExpressionsWithIntervalArithmeticParameterName, "Switch that determines if the interpreter checks the validity of expressions with interval arithmetic before evaluating the expression.", new BoolValue(false)));
|
---|
| 212 | }
|
---|
| 213 |
|
---|
| 214 | public IEnumerable<double> GetSymbolicExpressionTreeValues(ISymbolicExpressionTree tree, Dataset dataset, IEnumerable<int> rows) {
|
---|
| 215 | if (CheckExpressionsWithIntervalArithmetic.Value)
|
---|
| 216 | throw new NotSupportedException("Interval arithmetic is not yet supported in the symbolic data analysis interpreter.");
|
---|
| 217 | var compiler = new SymbolicExpressionTreeCompiler();
|
---|
| 218 | Instruction[] code = compiler.Compile(tree, MapSymbolToOpCode);
|
---|
| 219 | int necessaryArgStackSize = 0;
|
---|
[6741] | 220 |
|
---|
| 221 | Dictionary<string, int> doubleVariableNames = dataset.DoubleVariables.Select((x, i) => new { x, i }).ToDictionary(e => e.x, e => e.i);
|
---|
| 222 | IList<double>[] columns = (from v in doubleVariableNames.Keys
|
---|
| 223 | select dataset.GetReadOnlyDoubleValues(v))
|
---|
| 224 | .ToArray();
|
---|
| 225 |
|
---|
[6732] | 226 | for (int i = 0; i < code.Length; i++) {
|
---|
| 227 | Instruction instr = code[i];
|
---|
| 228 | if (instr.opCode == OpCodes.Variable) {
|
---|
| 229 | var variableTreeNode = instr.dynamicNode as VariableTreeNode;
|
---|
[6741] | 230 | instr.iArg0 = doubleVariableNames[variableTreeNode.VariableName];
|
---|
[6732] | 231 | code[i] = instr;
|
---|
| 232 | } else if (instr.opCode == OpCodes.LagVariable) {
|
---|
| 233 | var variableTreeNode = instr.dynamicNode as LaggedVariableTreeNode;
|
---|
[6741] | 234 | instr.iArg0 = doubleVariableNames[variableTreeNode.VariableName];
|
---|
[6732] | 235 | code[i] = instr;
|
---|
| 236 | } else if (instr.opCode == OpCodes.VariableCondition) {
|
---|
| 237 | var variableConditionTreeNode = instr.dynamicNode as VariableConditionTreeNode;
|
---|
[6741] | 238 | instr.iArg0 = doubleVariableNames[variableConditionTreeNode.VariableName];
|
---|
[6732] | 239 | } else if (instr.opCode == OpCodes.Call) {
|
---|
| 240 | necessaryArgStackSize += instr.nArguments + 1;
|
---|
| 241 | }
|
---|
| 242 | }
|
---|
| 243 | var state = new InterpreterState(code, necessaryArgStackSize);
|
---|
| 244 |
|
---|
[6741] | 245 | Type[] methodArgs = { typeof(int), typeof(IList<double>[]) };
|
---|
[6732] | 246 | DynamicMethod testFun = new DynamicMethod("TestFun", typeof(double), methodArgs, typeof(SymbolicDataAnalysisExpressionTreeILEmittingInterpreter).Module);
|
---|
| 247 |
|
---|
| 248 | ILGenerator il = testFun.GetILGenerator();
|
---|
| 249 | CompileInstructions(il, state);
|
---|
| 250 | il.Emit(System.Reflection.Emit.OpCodes.Conv_R8);
|
---|
| 251 | il.Emit(System.Reflection.Emit.OpCodes.Ret);
|
---|
| 252 | var function = (CompiledFunction)testFun.CreateDelegate(typeof(CompiledFunction));
|
---|
| 253 |
|
---|
| 254 | foreach (var row in rows) {
|
---|
[6741] | 255 | yield return function(row, columns);
|
---|
[6732] | 256 | }
|
---|
| 257 | }
|
---|
| 258 |
|
---|
| 259 | private void CompileInstructions(ILGenerator il, InterpreterState state) {
|
---|
| 260 | Instruction currentInstr = state.NextInstruction();
|
---|
| 261 | int nArgs = currentInstr.nArguments;
|
---|
| 262 |
|
---|
| 263 | switch (currentInstr.opCode) {
|
---|
| 264 | case OpCodes.Add: {
|
---|
| 265 | if (nArgs > 0) {
|
---|
| 266 | CompileInstructions(il, state);
|
---|
| 267 | }
|
---|
| 268 | for (int i = 1; i < nArgs; i++) {
|
---|
| 269 | CompileInstructions(il, state);
|
---|
| 270 | il.Emit(System.Reflection.Emit.OpCodes.Add);
|
---|
| 271 | }
|
---|
| 272 | return;
|
---|
| 273 | }
|
---|
| 274 | case OpCodes.Sub: {
|
---|
| 275 | if (nArgs == 1) {
|
---|
| 276 | CompileInstructions(il, state);
|
---|
| 277 | il.Emit(System.Reflection.Emit.OpCodes.Neg);
|
---|
| 278 | return;
|
---|
| 279 | }
|
---|
| 280 | if (nArgs > 0) {
|
---|
| 281 | CompileInstructions(il, state);
|
---|
| 282 | }
|
---|
| 283 | for (int i = 1; i < nArgs; i++) {
|
---|
| 284 | CompileInstructions(il, state);
|
---|
| 285 | il.Emit(System.Reflection.Emit.OpCodes.Sub);
|
---|
| 286 | }
|
---|
| 287 | return;
|
---|
| 288 | }
|
---|
| 289 | case OpCodes.Mul: {
|
---|
| 290 | if (nArgs > 0) {
|
---|
| 291 | CompileInstructions(il, state);
|
---|
| 292 | }
|
---|
| 293 | for (int i = 1; i < nArgs; i++) {
|
---|
| 294 | CompileInstructions(il, state);
|
---|
| 295 | il.Emit(System.Reflection.Emit.OpCodes.Mul);
|
---|
| 296 | }
|
---|
| 297 | return;
|
---|
| 298 | }
|
---|
| 299 | case OpCodes.Div: {
|
---|
| 300 | if (nArgs == 1) {
|
---|
| 301 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0);
|
---|
| 302 | CompileInstructions(il, state);
|
---|
| 303 | il.Emit(System.Reflection.Emit.OpCodes.Div);
|
---|
| 304 | return;
|
---|
| 305 | }
|
---|
| 306 | if (nArgs > 0) {
|
---|
| 307 | CompileInstructions(il, state);
|
---|
| 308 | }
|
---|
| 309 | for (int i = 1; i < nArgs; i++) {
|
---|
| 310 | CompileInstructions(il, state);
|
---|
| 311 | il.Emit(System.Reflection.Emit.OpCodes.Div);
|
---|
| 312 | }
|
---|
| 313 | return;
|
---|
| 314 | }
|
---|
| 315 | case OpCodes.Average: {
|
---|
| 316 | CompileInstructions(il, state);
|
---|
| 317 | for (int i = 1; i < nArgs; i++) {
|
---|
| 318 | CompileInstructions(il, state);
|
---|
| 319 | il.Emit(System.Reflection.Emit.OpCodes.Add);
|
---|
| 320 | }
|
---|
| 321 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4, nArgs);
|
---|
| 322 | il.Emit(System.Reflection.Emit.OpCodes.Div);
|
---|
| 323 | return;
|
---|
| 324 | }
|
---|
| 325 | case OpCodes.Cos: {
|
---|
| 326 | CompileInstructions(il, state);
|
---|
| 327 | il.Emit(System.Reflection.Emit.OpCodes.Call, cos);
|
---|
| 328 | return;
|
---|
| 329 | }
|
---|
| 330 | case OpCodes.Sin: {
|
---|
| 331 | CompileInstructions(il, state);
|
---|
| 332 | il.Emit(System.Reflection.Emit.OpCodes.Call, sin);
|
---|
| 333 | return;
|
---|
| 334 | }
|
---|
| 335 | case OpCodes.Tan: {
|
---|
| 336 | CompileInstructions(il, state);
|
---|
| 337 | il.Emit(System.Reflection.Emit.OpCodes.Call, tan);
|
---|
| 338 | return;
|
---|
| 339 | }
|
---|
| 340 | case OpCodes.Power: {
|
---|
| 341 | CompileInstructions(il, state);
|
---|
| 342 | CompileInstructions(il, state);
|
---|
[6755] | 343 | il.Emit(System.Reflection.Emit.OpCodes.Call, round);
|
---|
[6732] | 344 | il.Emit(System.Reflection.Emit.OpCodes.Call, power);
|
---|
| 345 | return;
|
---|
| 346 | }
|
---|
| 347 | case OpCodes.Root: {
|
---|
[6755] | 348 | CompileInstructions(il, state);
|
---|
| 349 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // 1 / round(...)
|
---|
| 350 | CompileInstructions(il, state);
|
---|
| 351 | il.Emit(System.Reflection.Emit.OpCodes.Call, round);
|
---|
| 352 | il.Emit(System.Reflection.Emit.OpCodes.Div);
|
---|
| 353 | il.Emit(System.Reflection.Emit.OpCodes.Call, power);
|
---|
| 354 | return;
|
---|
[6732] | 355 | }
|
---|
| 356 | case OpCodes.Exp: {
|
---|
| 357 | CompileInstructions(il, state);
|
---|
| 358 | il.Emit(System.Reflection.Emit.OpCodes.Call, exp);
|
---|
| 359 | return;
|
---|
| 360 | }
|
---|
| 361 | case OpCodes.Log: {
|
---|
| 362 | CompileInstructions(il, state);
|
---|
| 363 | il.Emit(System.Reflection.Emit.OpCodes.Call, log);
|
---|
| 364 | return;
|
---|
| 365 | }
|
---|
| 366 | case OpCodes.IfThenElse: {
|
---|
| 367 | Label end = il.DefineLabel();
|
---|
| 368 | Label c1 = il.DefineLabel();
|
---|
| 369 | CompileInstructions(il, state);
|
---|
| 370 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // > 0
|
---|
| 371 | il.Emit(System.Reflection.Emit.OpCodes.Cgt);
|
---|
| 372 | il.Emit(System.Reflection.Emit.OpCodes.Brfalse, c1);
|
---|
| 373 | CompileInstructions(il, state);
|
---|
| 374 | il.Emit(System.Reflection.Emit.OpCodes.Br, end);
|
---|
| 375 | il.MarkLabel(c1);
|
---|
| 376 | CompileInstructions(il, state);
|
---|
| 377 | il.MarkLabel(end);
|
---|
| 378 | return;
|
---|
| 379 | }
|
---|
| 380 | case OpCodes.AND: {
|
---|
| 381 | Label falseBranch = il.DefineLabel();
|
---|
| 382 | Label end = il.DefineLabel();
|
---|
| 383 | CompileInstructions(il, state);
|
---|
| 384 | for (int i = 1; i < nArgs; i++) {
|
---|
| 385 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // > 0
|
---|
| 386 | il.Emit(System.Reflection.Emit.OpCodes.Cgt);
|
---|
| 387 | il.Emit(System.Reflection.Emit.OpCodes.Brfalse, falseBranch);
|
---|
| 388 | CompileInstructions(il, state);
|
---|
| 389 | }
|
---|
| 390 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // > 0
|
---|
| 391 | il.Emit(System.Reflection.Emit.OpCodes.Cgt);
|
---|
| 392 | il.Emit(System.Reflection.Emit.OpCodes.Brfalse, falseBranch);
|
---|
| 393 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // 1
|
---|
| 394 | il.Emit(System.Reflection.Emit.OpCodes.Br, end);
|
---|
| 395 | il.MarkLabel(falseBranch);
|
---|
| 396 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // -1
|
---|
| 397 | il.Emit(System.Reflection.Emit.OpCodes.Neg);
|
---|
| 398 | il.MarkLabel(end);
|
---|
| 399 | return;
|
---|
| 400 | }
|
---|
| 401 | case OpCodes.OR: {
|
---|
| 402 | Label trueBranch = il.DefineLabel();
|
---|
| 403 | Label end = il.DefineLabel();
|
---|
| 404 | Label resultBranch = il.DefineLabel();
|
---|
| 405 | CompileInstructions(il, state);
|
---|
| 406 | for (int i = 1; i < nArgs; i++) {
|
---|
| 407 | Label nextArgBranch = il.DefineLabel();
|
---|
| 408 | // complex definition because of special properties of NaN
|
---|
| 409 | il.Emit(System.Reflection.Emit.OpCodes.Dup);
|
---|
| 410 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // <= 0
|
---|
| 411 | il.Emit(System.Reflection.Emit.OpCodes.Ble, nextArgBranch);
|
---|
| 412 | il.Emit(System.Reflection.Emit.OpCodes.Br, resultBranch);
|
---|
| 413 | il.MarkLabel(nextArgBranch);
|
---|
| 414 | il.Emit(System.Reflection.Emit.OpCodes.Pop);
|
---|
| 415 | CompileInstructions(il, state);
|
---|
| 416 | }
|
---|
| 417 | il.MarkLabel(resultBranch);
|
---|
| 418 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // > 0
|
---|
| 419 | il.Emit(System.Reflection.Emit.OpCodes.Cgt);
|
---|
| 420 | il.Emit(System.Reflection.Emit.OpCodes.Brtrue, trueBranch);
|
---|
| 421 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // -1
|
---|
| 422 | il.Emit(System.Reflection.Emit.OpCodes.Neg);
|
---|
| 423 | il.Emit(System.Reflection.Emit.OpCodes.Br, end);
|
---|
| 424 | il.MarkLabel(trueBranch);
|
---|
| 425 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // 1
|
---|
| 426 | il.MarkLabel(end);
|
---|
| 427 | return;
|
---|
| 428 | }
|
---|
| 429 | case OpCodes.NOT: {
|
---|
| 430 | CompileInstructions(il, state);
|
---|
| 431 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0); // > 0
|
---|
| 432 | il.Emit(System.Reflection.Emit.OpCodes.Cgt);
|
---|
| 433 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 2.0); // * 2
|
---|
| 434 | il.Emit(System.Reflection.Emit.OpCodes.Mul);
|
---|
| 435 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // - 1
|
---|
| 436 | il.Emit(System.Reflection.Emit.OpCodes.Sub);
|
---|
| 437 | il.Emit(System.Reflection.Emit.OpCodes.Neg); // * -1
|
---|
| 438 | return;
|
---|
| 439 | }
|
---|
| 440 | case OpCodes.GT: {
|
---|
| 441 | CompileInstructions(il, state);
|
---|
| 442 | CompileInstructions(il, state);
|
---|
| 443 | il.Emit(System.Reflection.Emit.OpCodes.Cgt); // 1 (>) / 0 (otherwise)
|
---|
| 444 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 2.0); // * 2
|
---|
| 445 | il.Emit(System.Reflection.Emit.OpCodes.Mul);
|
---|
| 446 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // - 1
|
---|
| 447 | il.Emit(System.Reflection.Emit.OpCodes.Sub);
|
---|
| 448 | return;
|
---|
| 449 | }
|
---|
| 450 | case OpCodes.LT: {
|
---|
| 451 | CompileInstructions(il, state);
|
---|
| 452 | CompileInstructions(il, state);
|
---|
| 453 | il.Emit(System.Reflection.Emit.OpCodes.Clt);
|
---|
| 454 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 2.0); // * 2
|
---|
| 455 | il.Emit(System.Reflection.Emit.OpCodes.Mul);
|
---|
| 456 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0); // - 1
|
---|
| 457 | il.Emit(System.Reflection.Emit.OpCodes.Sub);
|
---|
| 458 | return;
|
---|
| 459 | }
|
---|
| 460 | case OpCodes.TimeLag: {
|
---|
| 461 | throw new NotImplementedException();
|
---|
| 462 | }
|
---|
| 463 | case OpCodes.Integral: {
|
---|
| 464 | throw new NotImplementedException();
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 | //mkommend: derivate calculation taken from:
|
---|
| 468 | //http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/smooth-low-noise-differentiators/
|
---|
| 469 | //one sided smooth differentiatior, N = 4
|
---|
| 470 | // y' = 1/8h (f_i + 2f_i-1, -2 f_i-3 - f_i-4)
|
---|
| 471 | case OpCodes.Derivative: {
|
---|
| 472 | throw new NotImplementedException();
|
---|
| 473 | }
|
---|
| 474 | case OpCodes.Call: {
|
---|
| 475 | throw new NotImplementedException();
|
---|
| 476 | }
|
---|
| 477 | case OpCodes.Arg: {
|
---|
| 478 | throw new NotImplementedException();
|
---|
| 479 | }
|
---|
| 480 | case OpCodes.Variable: {
|
---|
[6741] | 481 | VariableTreeNode varNode = (VariableTreeNode)currentInstr.dynamicNode;
|
---|
| 482 | il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1); // load columns array
|
---|
| 483 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4, (int)currentInstr.iArg0); // load correct column of the current variable
|
---|
| 484 | il.Emit(System.Reflection.Emit.OpCodes.Ldelem_Ref);
|
---|
| 485 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4, 0); // sampleOffset
|
---|
| 486 | il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0); // sampleIndex
|
---|
| 487 | il.Emit(System.Reflection.Emit.OpCodes.Add); // row = sampleIndex + sampleOffset
|
---|
| 488 | il.Emit(System.Reflection.Emit.OpCodes.Call, listGetValue);
|
---|
| 489 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, varNode.Weight); // load weight
|
---|
| 490 | il.Emit(System.Reflection.Emit.OpCodes.Mul);
|
---|
[6732] | 491 | return;
|
---|
| 492 | }
|
---|
| 493 | case OpCodes.LagVariable: {
|
---|
| 494 | throw new NotImplementedException();
|
---|
| 495 | }
|
---|
| 496 | case OpCodes.Constant: {
|
---|
| 497 | ConstantTreeNode constNode = (ConstantTreeNode)currentInstr.dynamicNode;
|
---|
| 498 | il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, constNode.Value);
|
---|
| 499 | return;
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | //mkommend: this symbol uses the logistic function f(x) = 1 / (1 + e^(-alpha * x) )
|
---|
| 503 | //to determine the relative amounts of the true and false branch see http://en.wikipedia.org/wiki/Logistic_function
|
---|
| 504 | case OpCodes.VariableCondition: {
|
---|
| 505 | throw new NotImplementedException();
|
---|
| 506 | }
|
---|
| 507 | default: throw new NotSupportedException();
|
---|
| 508 | }
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | private byte MapSymbolToOpCode(ISymbolicExpressionTreeNode treeNode) {
|
---|
| 512 | if (symbolToOpcode.ContainsKey(treeNode.Symbol.GetType()))
|
---|
| 513 | return symbolToOpcode[treeNode.Symbol.GetType()];
|
---|
| 514 | else
|
---|
| 515 | throw new NotSupportedException("Symbol: " + treeNode.Symbol);
|
---|
| 516 | }
|
---|
| 517 |
|
---|
| 518 | // skips a whole branch
|
---|
| 519 | private void SkipInstructions(InterpreterState state) {
|
---|
| 520 | int i = 1;
|
---|
| 521 | while (i > 0) {
|
---|
| 522 | i += state.NextInstruction().nArguments;
|
---|
| 523 | i--;
|
---|
| 524 | }
|
---|
| 525 | }
|
---|
| 526 | }
|
---|
| 527 | }
|
---|