[Aldor-l] Aldor Problem

[Ralf Hemmecke]

Could you send a clearer bugreport. I don't have the file dfttest.as so 
I cannot say anything.

Just one comment. If you use the library algebrad, then you should also 
use aldord and the -DDEBUG switch. See section "Profiling and debugging" 
in the "Algebra User Guide and Reference Manual"
http://www-sop.inria.fr/safir/WHOSWHO/Manuel.Bronstein/algebra/index.html

Usually, if code compiled against the debug version of the library gives 
a correct result and compiled against the ordinary library returns 
something wrong then it is an indication of a bug in the compiler itself.

Ralf

Akpodigha Filatei wrote:
> 
> 
> Hi All,
> The same piece of aldor code  when compiled with the -l algebra or -l 
> algebrad library flags give different results.  The result from algebrad 
> is correct but that from algebra is wrong.  Any of you encountered this 
> in the past?  Any known fix?  Compiler version is 1.0.3 with latest 
> libalgebra.
> 
> e.g
> [afilatei at medium FFT]$ aldor -lalgebrad -laldor -Fx dfttest.as
> [afilatei at medium FFT]$ ./dfttest
> dft! w shf [5 61394 513 53234 65534 4145 65026 12305 ]    <--- correct 
> result
> 
> [afilatei at medium FFT]$ aldor -lalgebra -laldor -Fx dfttest.as
> [afilatei at medium FFT]$ ./dfttest
> dft! w shf [5 57298 256 53217 65534 8241 65281 12320 ]  <--- wrong result
> 
> The package was defined thus:
> FFTMultiplicationPackage(K:Field,U:UnivariatePolynomialAlgebra(K)): with {
> 
> If the function with the problem is written as a standalone it gives 
> correct results in both cases.  So, I am about to suspect either of 
> "Field" or "UnivariatePolynomialAlgebra" implementation in libalgebra. 
> What say any of you?
> 
> More info:  I have already implemented the same code in C++ (NTL) 
> successfully which gives me additional reason to believe that the code 
> might be correct.
> 
> Thanks
> 
> 
> Filatei