Re: [Bug-gsl] [PATCH] Disable use of FMA

[Andreas Schwab]

Tuomo Keskitalo <address@hidden> writes:

> What's your architecture/platform, compiler & version?

gcc 4.6 on G5.

> msbdf should never increase or decrease order by more than one, unless it
> is reset, so there's something really wrong there. Please post all lines
> until previous "msbdf_apply:". Is this coming from test_extreme_problems?

-- msbdf_reset called
msbdf_apply: t=0.00000e+00, ord=1, h=1.00000e-10, y:0.00000e+00 0.00000e+00 
0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 
0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 
0.00000e+00 
-- ord=1, ni=0, ordwait=2
-- ordprev: 1 1 1 1 1 
-- errlev: 1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 
1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 
1.00000e-07 1.00000e-07 1.00000e-07 1.00000e-07 
-- check_no_order_decrease 1, check_step_size_decrease 0
-- calccoeffs ordm1coeff=0.00000e+00 ordp1coeff=2.00000e+00 
ordp2coeff=6.00000e+00 errcoeff=5.00000e-01
-- predicted y: 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 
0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 
0.00000e+00 0.00000e+00 0.00000e+00 0.00000e+00 
-- evaluate jacobian
-- update M, gamma=1.00000e-10
-- dstep: 9.81743e-17 -8.68549e-36 9.07047e-10 -9.07047e-10 -9.07047e-10 
9.07047e-10 -3.62750e-13 -2.20616e-27 5.60182e-46 -1.81409e-16 -1.81409e-16 
1.81409e-16 1.81409e-16 1.57079e-14 -1.96797e-42

> I too bet on a compiler issue.

Definitely not.

Andreas.

-- 
Andreas Schwab, address@hidden
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