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c.f. bug 424647
List Archive: gentoo-amd64
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To: gentoo-amd64@g.o
From: Mark Knecht <markknecht@...>
Subject: Re: Possible Math Problem - Request For Verification
Date: Sat, 25 Jun 2011 17:22:41 -0700
On Sat, Jun 25, 2011 at 4:54 PM, Marc Joliet <marcec@...> wrote:
> Am Sat, 25 Jun 2011 13:41:11 -0400
> schrieb Frank Peters <frank.peters@...>:
>
>> Hello,
>>
> [background information]
>
> Huh, I was unaware that GNU (since they're the authors of GCC/GLIBC) ever had
> problems in this area. Since I use my machine for numerical tasks, too, I was
> interested in seeing whether I would see the same problem.
>
>> The code will take several minutes to compile, execute, and complete.  While
>> the test is running it will spit out its progress to stdout.  Upon completion
>> a brief summary is given:
>>
>> UCBFAIL indicates problems!
>> /tmp/fp-test-results/ccos_DP.output: ucbtest UCBFAIL in COS(X) at line 444 for generic
>> /tmp/fp-test-results/clib_DP.output: ucbtest UCBFAIL in cabsd at line 701 for double
>> /tmp/fp-test-results/clib_DP.output: ucbtest UCBFAIL in powd at line 701 for double
>> /tmp/fp-test-results/clib_DP.output:UCBFAIL clib_DP.output , 25 out of 25 tests completed
>> /tmp/fp-test-results/csin_DP.output: ucbtest UCBFAIL in SIN(X) at line 444 for generic
>>
>> only 11 out of 14 show UCBPASS!
>
> I ran the tests without any modifications to ucbREADME/linux.sh and don't get
> the cabsd failure:
>
>    UCBFAIL indicates problems!
>    /tmp/fp-test-results/ccos_DP.output: ucbtest UCBFAIL in COS(X) at line 444 for generic
>    /tmp/fp-test-results/clib_DP.output: ucbtest UCBFAIL in powd at line 701 for double
>    /tmp/fp-test-results/clib_DP.output:UCBFAIL clib_DP.output , 25 out of 25 tests completed
>    /tmp/fp-test-results/csin_DP.output: ucbtest UCBFAIL in SIN(X) at line 444 for generic
>
>    only 11 out of 14 show UCBPASS!
>

Indeed, it was even manageable for a non-programmer like me.

Like Marc's results I do not see the cabsd failure. This machine is an
Intel i7-980x Extreme running Gentoo 64-bit mostly stable.

UCBFAIL indicates problems!
/tmp/fp-test-results/ccos_DP.output: ucbtest UCBFAIL in COS(X) at line
444 for generic
/tmp/fp-test-results/clib_DP.output: ucbtest UCBFAIL in powd at line
701 for double
/tmp/fp-test-results/clib_DP.output:UCBFAIL clib_DP.output , 25 out of
25 tests completed
/tmp/fp-test-results/csin_DP.output: ucbtest UCBFAIL in SIN(X) at line
444 for generic

HTH,
Mark


Replies:
Re: Possible Math Problem - Request For Verification
-- Frank Peters
References:
Possible Math Problem - Request For Verification
-- Frank Peters
Re: Possible Math Problem - Request For Verification
-- Marc Joliet
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Updated Jun 28, 2012

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