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Re: [PATCH] Fix underflow and inexact signalling in soft-fp whenpacking.
From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Fri, 25 May 2012 23:43:18 +0000 (UTC)
> On Fri, 25 May 2012, David Miller wrote:
>
>> And I'm trying to make this code match as close as possible what we
>> use there since this bug has been fixed in the Linux kernel copy for
>> almost 5 years and that code has been rigorously tested against
>> TestFloat by the powerpc folks.
>
> Did the Linux kernel version ever get updated for all the performance
> improvements and bug fixes I made in 2005-6? Unless it did, I'm not
> convinced keeping the two in sync is very meaningful; those were pretty
> substantial changes to a lot of the code.
Did I ever tell you how extremely unfortunate it is that we have three
copies of this soft-fp code base and no real synchronization between
them?
I warned way back when libgcc got a copy of the soft-fp code that this
would happen, and those warnings fell on deaf ears.
I'll try to minimize my patch so that the sparc testsuite stops
regressing.
Longer term we need to rectify the situation that we have three
copies of the soft-fp code base, each has different bugs fixed
and different performance improvements.