Merlin Moncure <mmonc...@gmail.com> writes: > On Sun, Dec 4, 2011 at 4:55 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> Pavel Stehule <pavel.steh...@gmail.com> writes: > it looks like gcc bug - gcc 4.5.1 20100924 (Red Hat 4.5.1) It was > configured just with --enable-debug and --enable-cassert >> >> Is this x86? I can't reproduce it on x86_64.
> reading all the comments in the gcc bug report, this is because x86 > targets the x87 fpu by default which is where the bug is -- it's a > hardware problem. x86_64 targets sse which has stricter standards for > rounding. most x86 processors support sse -- is there a reason why we > don't target sse? Well, older machines won't have sse, and in any case I think x86 is not the only architecture with the issue, just the most popular one. Floating-point registers that are wider than standard double are hardly an unusual idea. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers