Bugs item #678265, was opened at 2003-01-31 12:10 Message generated for change (Comment added) made by mdr0 You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=678265&group_id=5470

Category: Python Interpreter Core Group: None Status: Open Resolution: None Priority: 5 Submitted By: Neal Norwitz (nnorwitz) Assigned to: Nobody/Anonymous (nobody) Summary: test_coercion fails on AIX

Initial Comment: Tim, I assigned this to you to see if you had any insight/ideas about this problem.

test_coercion fails on AIX. All the failures are due to the test expecting n+0j, but the output is n-0j.

Here's an example:

- <MethodNumber 1> / (2+0j) = (0.5+0j) ? ^ + <MethodNumber 1> / (2+0j) = (0.5-0j) ? ^

I have another compiler, so I&#039;ll probably try that. Especially since it&#039;s gcc. :-)

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Comment By: Mark D. Roth (mdr0) Date: 2004-03-09 15:35

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I've run into this same problem under AIX 4.3.3 with IBM compiler version 6.0.0.5 and under AIX 5.1 with IBM compiler version 6.0.0.4.

Is there a work-around, other than building with gcc?

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Comment By: Tim Peters (tim_one) Date: 2003-01-31 15:08

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You really need a platform wizard for something like this. If there are any compiler options with descriptions like "generate IEEE-754 compatible code" (or "stricter 754 xyz"), or "disable generation of fused multiply-add", they would be relevant.

OTOH, Python promises nothing about how the sign bit of a floating zero behaves, so it would be OK by me if the test were changed not to produce complex results with zero imaginary members.

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Comment By: Neal Norwitz (nnorwitz) Date: 2003-01-31 13:26

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The test passes with gcc 3.2. The C compiler is in vac.C version 4.4.0.3 (lslpp -l vac.C).

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