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Re: long double test failures due to underflow exception getting set?
- From: Steve Ellcey <sellcey at cavium dot com>
- To: Carlos O'Donell <carlos at redhat dot com>, libc-alpha at sourceware dot org
- Date: Thu, 20 Jul 2017 09:27:56 -0700
- Subject: Re: long double test failures due to underflow exception getting set?
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Interesting, I just built and tested glibc with GCC 5.4 and I did not
get these failures. When I build and test with the latest ToT GCC
I do get the failures. I will continue to see if I can figure out what
is going on.
Steve Ellcey
On Wed, 2017-07-19 at 20:58 -0400, Carlos O'Donell wrote:
> On 07/19/2017 05:34 PM, Steve Ellcey wrote:
> >
> > Is anyone else seeing these failures with the latest glibc sources?
> > I am getting them on aarch64 (standard ToT sources) and was
> > wondering
> > if this is an aarch64 specific problem or a more generic
> > bug. Since
> > all the failures involve long double I don't think they are using
> > aarch64 specific code, but I could be wrong.
> >
> > FAIL: math/test-ldouble-cexp
> > FAIL: math/test-ldouble-exp
> > FAIL: math/test-ldouble-finite-cexp
> > FAIL: math/test-ldouble-finite-exp
> >
> > I think these failures are new and all of the failures listed are
> > about the Underflow exception being set:
> >
> > I.e.
> >
> > testing long double (without inline functions)
> > Failure: exp (-0x1p-10000): Exception "Underflow" set
> > Failure: exp (-0x2p-16384): Exception "Underflow" set
> > Failure: exp (-0x4p-16384): Exception "Underflow" set
> > Failure: exp (-0x4p-16448): Exception "Underflow" set
> > Failure: exp (-0x4p-16496): Exception "Underflow" set
> > Failure: exp (-0x8p-16448): Exception "Underflow" set
> Neither DJ nor Szabolcs's glibc 2.26 builds showed those failures:
> https://sourceware.org/glibc/wiki/Release/2.26
>