[ET Trac] [Einstein Toolkit] #1218: MoL updates

[Einstein Toolkit]

#1218: MoL updates
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 Reporter:  eschnett               |       Owner:     
     Type:  defect                 |      Status:  new
 Priority:  major                  |   Milestone:     
Component:  EinsteinToolkit thorn  |     Version:     
 Keywords:                         |  
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 The enclosed patches update MoL in three respects:

 (1) Introduce a function LinearCombination that calculates a linear
 combination of several grid functions. Use this throughout several (but
 not yet all) integrators, simplifying the code substantially. This
 function can also be overloaded to execute on devices if OpenCL or CUDA is
 used, thus making MoL device aware.
 (2) Introduce a new integrator "Euler", providing an explicit first-order
 integrator. This is very handy for debugging.
 (3) Use cctk_ash instead of cctk_lsh where necessary.

 Since we use svn, these changed are intermingled in my working directory.
 I created the patches above manually.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1218>
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