Date: Wed, 2 Oct 2002 08:39:07 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Peter Jeremy <peter.jeremy@alcatel.com.au> Cc: Andrew Gallatin <gallatin@cs.duke.edu>, Archie Cobbs <archie@FreeBSD.ORG>, freebsd-alpha@FreeBSD.ORG Subject: Re: alpha/43567: strtod() core dumps Message-ID: <15770.59627.562216.206461@grasshopper.cs.duke.edu> In-Reply-To: <20021002055904.GG495@gsmx07.alcatel.com.au> References: <200210012021.g91KL1Ec032894@beast.freebsd.org> <15770.1923.354337.452249@grasshopper.cs.duke.edu> <20021002055904.GG495@gsmx07.alcatel.com.au>
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Peter Jeremy writes:
> On 2002-Oct-01 16:37:23 -0400, Andrew Gallatin <gallatin@cs.duke.edu> wrote:
> >Can you try rebuilding libc with -miee?
> >
> >Eg:
> >
> >.if ${MACHINE_ARCH} == "alpha"
> >CFLAGS += -mieee
> >.endif
> >
> >
> >I think that should probably go into bsd.lib.mk
> >
> >People might complain becase that slows down fp operations, but if
> >people care about performance, they should really be using the compaq
> >libm anyhow.
>
> I'd like to see us build 2 FP libraries, one '-mieee' and one without,
> with the "compiler" selecting the appropriate library based on the
> presence of -mieee during linking - which is what Compaq CC does.
> This gives you a choice of fast and dodgy or slow and correct.
Patches?
> In any case, strtod("5e-304", NULL) should always return 5e-304, it
> shouldn't give an exception unless the user has specifically asked for
> inexact exceptions.
All I know is that building libc with -mieee fixes a simlar problem when
building the gcc port (java build writes some header fiels and crashes
on an fp exception in some string function. -mieee fixes it right up).
Drew
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