[ADOL-C-tickets] [A Package for Automatic Differentiation of Algorithms Written in C/C++] #6: changing revreal to float gives bad numerical results

A Package for Automatic Differentiation of Algorithms Written in C/C++ coin-trac at coin-or.org
Wed Feb 17 16:45:08 EST 2010


#6: changing revreal to float gives bad numerical results
-------------------+--------------------------------------------------------
Reporter:  utke    |       Owner:  somebody  
    Type:  defect  |      Status:  new       
Priority:  major   |   Component:  component1
 Version:          |    Keywords:            
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 after the code change done in revision 81 a test with changing the revreal
 define to "float" shows type mismatches.
 Testing other  intrinsics (i.e. not changed by r81) shows that
 the results are wrong (see scalexam  -7/-8) too.

 The same change attempted in revision 2.0.0 does not compile at all.

 I don't understand  how the logic implemented in ho_rev.c
 is supposed to work regarding the use of
 rpp_T vs. dpp_A, , Targ/Tres vs. Aarg/Ares etc.

-- 
Ticket URL: <https://projects.coin-or.org/ADOL-C/ticket/6>
A Package for Automatic Differentiation of Algorithms Written in C/C++ <https://projects.coin-or.org/ADOL-C>
A Package for Automatic Differentiation of Algorithms Written in C/C++



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