| msg60924 - (view) |
Author: Bob Ippolito (bob.ippolito) *  |
Date: 2006-05-27 15:21 |
| Program received signal SIGFPE, Arithmetic exception. 0x0000000160418568 in bu_double (p=0x12049d29c "", f=0x0) at / house/etrepum/src/python-46462/Modules/_struct.c:219 (this is actually due to _PyFloat_Unpack8) |
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| msg60925 - (view) |
Author: Bob Ippolito (bob.ippolito) * |
Date: 2006-05-27 16:12 |
| Logged In: YES user_id=139309 More fun in test_long Program received signal SIGFPE, Arithmetic exception. 0x000000012003972c in float_richcompare (v=0x120397080, w=0x1203e7a00, op=2) at ../Objects/floatobject.c:387 387 else if (!Py_IS_FINITE(i)) { |
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| msg60926 - (view) |
Author: Bob Ippolito (bob.ippolito) * |
Date: 2006-05-27 16:12 |
| Logged In: YES user_id=139309 More fun in test_long Program received signal SIGFPE, Arithmetic exception. 0x000000012003972c in float_richcompare (v=0x120397080, w=0x1203e7a00, op=2) at ../Objects/floatobject.c:387 387 else if (!Py_IS_FINITE(i)) { |
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| msg60927 - (view) |
Author: Neal Norwitz (nnorwitz) * |
Date: 2006-06-01 06:02 |
| Logged In: YES user_id=33168 Try adding the -mieee flag when compiling. That should fix the problem. It looks like we only set this for OSF platforms. It should probably be set for all Alpha platforms. See: http://mail.python.org/pipermail/python-dev/2006-March/063219.html |
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| msg65724 - (view) |
Author: Mark Dickinson (mark.dickinson) * |
Date: 2008-04-24 14:01 |
| There are some current math and cmath test failures on the Debian alpha buildbots (2.6 and 3.0), and I think there's a good possibility that adding -mieee to BASECFLAGS would fix these. I'm struggling to find the right way to do this in configure.in. I've found the GCC specific section for BASECFLAGS (around line 800), but I don't know how to write a test for an alpha CPU (rather than a test for a specific operating system). Any hints or pointers? |
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| msg65771 - (view) |
Author: Neal Norwitz (nnorwitz) * |
Date: 2008-04-25 03:39 |
| I think `uname -m` will be equal to "alpha" in this case. There are several uses of `uname -m` in configure.in. You might need to add a new section. It might also be possible to clean up various special cases to make a generic `uname -m` section. I didn't look too closely though. -m is the machine type BTW, -m works on Tru64. I also tested on Ubuntu and it reported x86_64, on Debian it reported sparc. On OSX.4, it reported "Power Macintosh". |
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| msg65792 - (view) |
Author: Mark Dickinson (mark.dickinson) * |
Date: 2008-04-25 16:17 |
| Okay---I've added -mieee to BASECFLAGS in r62499, when uname -m reports alpha* and when gcc is the compiler; I've also added a configure message that simply reports the output of uname -m, to aid debugging in case anything funny happens. With luck, this should fix the problems reported by Bob Ippolito, as well as the current test_math and test_cmath failures. Bob, if you're still listening, are you in a position to check whether this change fixes the failures you reported? |
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| msg65974 - (view) |
Author: Mark Dickinson (mark.dickinson) * |
Date: 2008-04-29 17:34 |
| Adding -mieee didn't fix the math and cmath problems. Should I revert the change in r62499, or leave it in? It seems to me that having -mieee is a good thing on the whole. The main reason to not want IEEE 754 conformance would be speed. It looks like the math and cmath failures are due to libm behaviour; either (1) libm is making no attempt to be IEEE compliant, or (2) it's setting errno in places that it shouldn't, or (3) it's trying to be IEEE compliant but is buggy. I'm not sure how to proceed. Would it be okay to check in some temporary autoconf tests to help identify the source of the failures, and remove them later? |
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| msg86670 - (view) |
Author: Mark Dickinson (mark.dickinson) * |
Date: 2009-04-27 15:13 |
| Bob, can you still reproduce the originally reported SIGFPE? |
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| msg86672 - (view) |
Author: Bob Ippolito (bob.ippolito) * |
Date: 2009-04-27 15:38 |
| I don't even recall where I had access to a FreeBSD 6.0 Alpha machine, sorry. |
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| msg86676 - (view) |
Author: Mark Dickinson (mark.dickinson) * |
Date: 2009-04-27 16:33 |
| No problem! I'll close this as out of date, then. |
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