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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2020-06-15 19:10:30 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2020-06-15 19:10:33 -0400 |
| commit | 5674eb98762ed41c7f9672a3bc56edf925e9d97d (patch) | |
| tree | 0b630f2b3413d3fabe456a655d4bab535a3c0f65 /src/backend/access/gist/gistbuildbuffers.c | |
| parent | 2961c9711c17e5fe05fb1fbd72c3e47f3b601ee4 (diff) | |
| download | postgresql-5674eb98762ed41c7f9672a3bc56edf925e9d97d.tar.gz postgresql-5674eb98762ed41c7f9672a3bc56edf925e9d97d.zip | |
Fix power() for large inputs yet more.
Buildfarm results for commit e532b1d57 reveal the error in my thinking
about the unexpected-EDOM case. I'd supposed this was no longer really
a live issue, but it seems the fix for glibc's bug #3866 is not all that
old, and we still have at least one buildfarm animal (lapwing) with the
bug. Hence, resurrect essentially the previous logic (but, I hope, less
opaquely presented), and explain what it is we're really doing here.
Also, blindly try to fix fossa's failure by tweaking the logic that
figures out whether y is an odd integer when x is -inf. This smells
a whole lot like a compiler bug, but I lack access to icc to try to
pin it down. Maybe doing division instead of multiplication will
dodge the issue.
Discussion: https://postgr.es/m/E1jkU7H-00024V-NZ@gemulon.postgresql.org
Diffstat (limited to 'src/backend/access/gist/gistbuildbuffers.c')
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