Re: gm2 frontend in gcc 14 (fedora 40) bug

[Gerald Kasner]

Hi Michael,

here are the outputs of your test:

gm2 version 13.2.1

      125.000000000000369482222595252097
    -2880.000000000007275957614183425903
    14490.000000000032741809263825416565
   -24640.000000000047293724492192268372
    13230.000000000023646862246096134186

 A times solution

 +1        1.000000000000000000000000000000
 +2        2.000000000000000000000000000000
 +3        3.000000000000000444089209850063
 +4        4.000000000000000000000000000000
 +5        5.000000000000000000000000000000

 A times GM2 14.0.1 result

 +1    -3511.861111111118134431308135390282
 +2    -2721.708333333338941883994266390800
 +3    -2215.725000000004456524038687348366
 +4    -1865.505555555559340064064599573612
 +5    -1609.383333333336622672504745423794

 gm2 version 14.0.1

        1.000000000000000000000000000000
        1.500000000000000000000000000000
        1.166666666666666740681534975010
   -24640.000000000047293724492192268372
    13230.000000000023646862246096134186

 A times solution

  1    -3511.861111111118589178659021854401
  2    -2721.708333333338941883994266390800
  3    -2215.725000000004456524038687348366
  4    -1865.505555555559567437740042805672
  5    -1609.383333333336850046180188655853

 A times GM2 14.0.1 result

  1    -3511.861111111118134431308135390282
  2    -2721.708333333338941883994266390800
  3    -2215.725000000004456524038687348366
  4    -1865.505555555559340064064599573612
  5    -1609.383333333336622672504745423794

Best,

Gerald

> Gerald,
>
>         may
>           I ask you to run the code attached (amended your code with a
>           short test)
>           - just to check if we are not fooled by faulty IO-Routines.
> Don't assume this is the case, but just to be sure.
>
>         And
>           is the result "reproducible" if you use another right or left
>           hand side
>           for the linear system ?
> Gruß
>
> Michael
>
>         PS:
>           Gaius, if needed, I can send you the updated code (and test routines)
>           from my library to check other numerical code.
>