Rhys Ulerich <[email protected]> writes: > When you say "instable" do you mean that they fail at some particular > tolerance level? Could you give an example? The problem you describe > sounds like overly-sensitive unit tests rather than a reason to > entirely avoid FMAs.
This is the failure I get: gsl: msbdf.c:1336: ERROR: msbdf_apply too large order change -- order change -2 This comes from test_extreme_problems, with the "ringmod" problem. Enabling DEBUG in msbdf.c shows this difference between -ffp-contract=off and -ffp-contact=fast: --- dstep: 9.81743e-17 3.08687e-48 9.07047e-10 -9.07047e-10 -9.07047e-10 9.07047e-10 -3.62750e-13 -2.20616e-27 -6.93678e-59 -1.81409e-16 -1.81409e-16 1.81409e-16 1.81409e-16 1.57079e-14 4.93899e-46 +-- 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 Andreas. -- Andreas Schwab, [email protected] GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." _______________________________________________ Bug-gsl mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-gsl
