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Array in fuction

#1054  Permalink Top

Array in fuction

Apr-11-11 16:51:43

Hi,
I am a Windows OpenModelica user and I have the following problem: I have an instance of a class declared with an array (A a[1]). Within the instaciated class I call a function which returns one value of an array of a record. If the array size in the record is smaller or equal than 19, there is no problem. If the array size is greater 19 an unknown error occurs. The model code:

Code:




model FrameTest

// --- MAIN CLASS --- 



  Element element[1];  

end FrameTest;



//############################################################################################################



model Element 

  Profile profile;

  Real angle;                              

equation

  angle = funct(alpha=profile.alpha);

end Element;



//############################################################################################################



function funct

  input Real[:] alpha;                      

  output Real cOut;                         

algorithm

  cOut:= alpha[5];

end funct;



//############################################################################################################



record Profile

  parameter Real alpha[20]={1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0,16.0,17.0,18.0,19.0,20.0};

  //parameter Real alpha[19]={1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0,16.0,17.0,18.0,19.0};

end Profile;

Thanks for your help,

Sebastian

#1055  Permalink Top

Re: Array in fuction

Apr-11-11 17:15:55

I will have a look at this bug. Note that this is related to the vectorization limit of OpenModelica.
As a workaround, you can run

Code:

omc +v=100

, or setVectorizationLimit(100) in OMShell or OMEdit. But this may have a negative impact on the performance of large models.

#1057  Permalink Top

Re: Array in fuction

Apr-11-11 20:41:26

It works!
Thanks!

#1058  Permalink Top

Re: Array in fuction

Apr-12-11 10:51:18

In r8597+ it should also work with any vectorization limit:

Code:


size 3: +v=1

  real_array_create(&tmp1018, ((modelica_real*)&($Pelement$lB2$rB$Pprofile$Palpha)), 1, 3);

size 3: +v=100

  array_alloc_scalar_real_array(&tmp1018, 3, (modelica_real)$Pelement$lB2$rB$Pprofile$Palpha$lB1$rB, (modelica_real)$Pelement$lB2$rB$Pprofile$Palpha$lB2$rB, (modelica_real)$Pelement$lB2$rB$Pprofile$Palpha$lB3$rB);

The generated code should be faster with a lower limit since we just use a reference to the array instead of creating a new one...

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