Date: Mon, 26 Nov 2018 12:03:39 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: 32-bit double and long double On Mon, Nov 26, 2018 at 06:25:04PM +0300, Eugene Sharygin wrote: > Hi, > > We're using Musl on a platform where both float, double, and long double > are in IEEE-754 binary32 format, and I'm wondering if a patch that lifts > some of the assumptions made regarding widths of floating-point types > would be accepted. No, musl only supports (roughly) Annex-F conforming environments, with IEEE single and double and a long double type with IEEE-compatible semantics. Such patches won't be accepted upstream. Is there a reason your target is defining double in an unuseful and incompatible way rather than doing hard-single and soft-double? If you have any control over the choice of ABI, I think the latter makes a lot more sense. Rich > Here is the relevant excerpt from the documentation: > > > Floating-point formats are assumed to be IEEE-754 binary32 format for > > float and IEEE-754 binary64 for double. > > > > Supported long double formats: IEEE-754 binary64 (ld64) and x86 80 bit > > extended precision format (ld80) are fully supported and there is > > partial support for IEEE-754 binary128 (ld128). > > Eugene
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