[Python-bugs-list] [ python-Bugs-808285 ] Bad float->long conversion on openbsd/sparc

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Bugs item #808285, was opened at 2003-09-17 18:30
Message generated for change (Comment added) made by bescoto
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Category: Python Interpreter Core
Group: 3rd Party
Status: Closed
Resolution: None
Priority: 5
Submitted By: Ben Escoto (bescoto)
Assigned to: Nobody/Anonymous (nobody)
Summary: Bad float->long conversion on openbsd/sparc

Initial Comment:
$ uname -srvpm

OpenBSD 3.3 GENERIC#0 sparc64 SUNW,UltraSPARC-IIi @ 333

MHz, version 0 FPU

$ ./python  

Python 2.3 (#1, Sep 17 2003, 21:15:45) 

[GCC 2.95.3 20010125 (prerelease, propolice)] on openbsd3

Type "help", "copyright", "credits" or "license" for

more information.

>>> long(1000.0)

0L

>>> long(1000000.0)

00000L

>>> 32767 < long(1000000.0) < 32768

1



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>Comment By: Ben Escoto (bescoto)
Date: 2003-09-21 13:22

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Yes, you are right, upgrading to GCC 3.2.2 fixes the problem.



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Comment By: Martin v. Löwis (loewis)
Date: 2003-09-18 13:59

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That depends on the exact way how the compiler is installed.

Ask your system vendor. Reading the manual page might also help.



Closing as third-party.

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Comment By: Ben Escoto (bescoto)
Date: 2003-09-18 13:22

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Ahh.  Probably a stupid question, but how do I recompile as

32 bit?

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Comment By: Martin v. Löwis (loewis)
Date: 2003-09-18 12:21

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I see. It is then pretty certain that you are running into a

compiler bug. Sparc64 floating point just does not work

correctly in gcc 2.95.3. Recompiling Python as a 32-bit

application should fix the problem.

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Comment By: Ben Escoto (bescoto)
Date: 2003-09-18 12:12

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$ file python

python: ELF 64-bit MSB executable, Sparc64, version 1, for

OpenBSD, dynamically linked (uses shared libs), not stripped



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Comment By: Martin v. Löwis (loewis)
Date: 2003-09-18 12:02

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What is the output of "file python"?

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Comment By: Ben Escoto (bescoto)
Date: 2003-09-18 11:37

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Compiler is gcc 2.95.3.  How do I tell if it is a "64-bit

build"?



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Comment By: Martin v. Löwis (loewis)
Date: 2003-09-18 11:07

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Is this with a 64-bit build? If so, which compiler was used?

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