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Ignore:
Timestamp:
05/07/19 14:20:33 (4 years ago)
Author:
gkronber
Message:

#2915: Corrected calculation of cuberoot function in all interpreters and updated all formatters.
I tested a run with all interpreters and got the same results with all of them.

File:
1 edited

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  • trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/SymbolicDataAnalysisExpressionTreeILEmittingInterpreter.cs

    r16670 r16905  
    336336        case OpCodes.CubeRoot: {
    337337            CompileInstructions(il, state, ds);
     338            var c1 = il.DefineLabel();
     339            var end = il.DefineLabel();
     340
     341            il.Emit(System.Reflection.Emit.OpCodes.Dup); // x
     342            il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 0.0);
     343            il.Emit(System.Reflection.Emit.OpCodes.Clt); // x < 0?
     344            il.Emit(System.Reflection.Emit.OpCodes.Brfalse, c1);
     345            il.Emit(System.Reflection.Emit.OpCodes.Neg); // x = -x
    338346            il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0 / 3.0);
    339347            il.Emit(System.Reflection.Emit.OpCodes.Call, power);
     348            il.Emit(System.Reflection.Emit.OpCodes.Neg); // -Math.Pow(-x, 1/3)
     349            il.Emit(System.Reflection.Emit.OpCodes.Br, end);
     350            il.MarkLabel(c1);
     351            il.Emit(System.Reflection.Emit.OpCodes.Ldc_R8, 1.0 / 3.0);
     352            il.Emit(System.Reflection.Emit.OpCodes.Call, power);
     353            il.MarkLabel(end);
    340354            return;
    341355          }
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