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Date: Sun, 10 Nov 2013 10:15:41 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: David Chisnall <theraven@FreeBSD.org>
Subject: Re: MUSL math functions
Message-ID: <20131110181541.GA83590@troutmask.apl.washington.edu>
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Cc: David Schultz <das@FreeBSD.org>,
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On Sun, Nov 10, 2013 at 10:05:18AM +0000, David Chisnall wrote:
> On 8 Nov 2013, at 08:50, David Schultz <das@FreeBSD.ORG> wrote:
> 
> > However, several things have happened since then. For one, years
> > have passed and there's still quite a bit of work to do. For two,
> > the only ld128 platform, sparc64, doesn't look as important as it
> > used to be. For a long time, we had trouble even finding a viable
> > test machine. Therefore, I think any incremental improvement would
> > be welcome -- even if it means doing ld80 only.
> 
> The PowerPC SysV ABI says that it's ld128 

The use of ld128 in msun means the IEEE 128-bit binary format
with a 113-bit significand.  With (at least 32-bit) powerpc,
long double is represented by a double-double format with a
106-bit significand.  msun has no support for a double-double
format.
 
-- 
Steve