| commit | fa1d62c66cfd845fcfda33783a7881bca7aa8c1d | |
| author | Erik Lindahl <erik@kth.se> | |
| Thu, 7 Jul 2016 23:05:17 +0000 (8 01:05 +0200) | ||
| committer | Erik Lindahl <erik@kth.se> | |
| Fri, 8 Jul 2016 09:08:31 +0000 (8 11:08 +0200) | ||
| tree | e7a4c729d29596a1bc73bba9b93e01ca8648c071 | treesnapshot (tar.gz zip) |
| parent | 55c3a19d9b4c373d321f6e126dacc19559127620 | commitdiff |
Work around compiler issue with random test
gcc-4.8.4 running on 32-bit Linux fails a few
tests for random distributions. This seems
to be caused by the compiler doing something
strange (that can lead to differences in the lsb)
when we do not use the result as floating-point
values, but rather do exact binary comparisions.
This is valid C++, and bad behaviour of the
compiler (IMHO), but technically it is not required
to produce bitwise identical results at high
optimization. However, by using floating-point
tests with zero ULP tolerance the problem
appears to go away.
Fixes #1986.
Change-Id: I252f37b46605424c02435af0fbf7a4f81b493eb8
gcc-4.8.4 running on 32-bit Linux fails a few
tests for random distributions. This seems
to be caused by the compiler doing something
strange (that can lead to differences in the lsb)
when we do not use the result as floating-point
values, but rather do exact binary comparisions.
This is valid C++, and bad behaviour of the
compiler (IMHO), but technically it is not required
to produce bitwise identical results at high
optimization. However, by using floating-point
tests with zero ULP tolerance the problem
appears to go away.
Fixes #1986.
Change-Id: I252f37b46605424c02435af0fbf7a4f81b493eb8