Date: Sun, 10 Nov 2013 10:15:41 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: David Chisnall <theraven@FreeBSD.org> Cc: David Schultz <das@FreeBSD.org>, "freebsd-numerics@FreeBSD.org" <freebsd-numerics@FreeBSD.org>, Bruce Evans <brde@optusnet.com.au> Subject: Re: MUSL math functions Message-ID: <20131110181541.GA83590@troutmask.apl.washington.edu> In-Reply-To: <15792BD0-C47C-4DCA-A112-D3C54F211E67@FreeBSD.org> References: <DFD5EA35-ABDA-4A09-BFC7-9452D650C7FE@FreeBSD.org> <20131031133352.GA59918@troutmask.apl.washington.edu> <20131101072032.P1002@besplex.bde.org> <20131108085039.GA1821@zim.MIT.EDU> <15792BD0-C47C-4DCA-A112-D3C54F211E67@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
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