Re: What is wrong with Bugzilla? [Was: Re: GCC and Floating-Point]

[Toon Moene <toon@moene.indiv.nluug.nl>]

Vincent Lefevre wrote:

> On 2005-05-29 18:19:19 +0300, Michael Veksler wrote:
> 
>>If more than 50 people report it, independently, as a bug then it
>>sure is a bug. You might argue whether technically it is a bug, but
>>from user's perspective it is a bug (and you have over 50 duplicates
>>as an evidence). As such it has to be dealt with more positively.

> Concerning the extended precision, there are two problems.
> 
> First there is a bug in GCC concerning casts and assignments
> (see ISO/IEC 9899: 5.1.2.3#13, 6.3.1.5#2 and 6.3.1.8#2).
> 
> But even this were fixed, many users would still complain.
> That's why I think that the Linux kernel should set the CPU
> in double-precision mode, like some other OS's (MS Windows,
> *BSD) -- but this is off-topic here.

It's not off-topic.  In fact, Jim Wilson argued this point here:

http://gcc.gnu.org/ml/gcc/2003-08/msg01282.html

"The best pragmatic solution is probably to set the rounding control to 
64-bits, but then we lose access to long double which some people need, 
and we still have excess precision problems for float."

Hope this helps,

-- 
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
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