gcc/libm floating-point bug?

[Dofri Jonsson]

See PR bin/43299: march=pentium4 miscompiles msun/src/e_pow.c for more
details:
http://www.freebsd.org/cgi/query-pr.cgi?pr=43299

On Tue, 2003-05-20 at 14:25, Jon Lido wrote:
> I've been running 5-CURRENT on my laptop for about a week now.  I believe I 
> may have found a bug in FreeBSD's gcc floating-point code generation, or 
> perhaps more likely, in the math library.
> 
> Like most users, I don't do much with floating point, so it took me a while to 
> narrow this one down.  Where I've noticed the problem is playing when lossy 
> audio.  When playing MP3s with artsd, xmms, or mpg123, I can get extremely 
> noisy output (like static), with the audio distorted, but recognizable 
> underneath.  Ogg Vorbis files don't play at all, and simply crash artsd and 
> xmms.  I would have dismissed this as an audio problem, but I am able to play 
> wav and shn audio (which uses integer math for decompression, I believe) 
> fine.  Additionally, I can decode and play MP3s fine with mpg321, which uses 
> an integer decoder.
> 
> I know my floating point hardware is fine, since I used to run xmms and artsd 
> fine under Linux before I switched the machine to FreeBSD.
> 
> I'd appreciate any help with further isolating and reproducing the bug.  Has 
> anyone else experienced this problem?
> 
> -Jon
> 
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