Date: Wed, 6 Dec 2017 20:33:54 +0100 From: ardi <ardillasdelmonte@...il.com> To: musl@...ts.openwall.com Subject: Re: Feasability of patching libm with OS X 10.5.8 libc for IBM double-double in PPC On Wed, Dec 6, 2017 at 6:53 PM, Szabolcs Nagy <nsz@...t70.net> wrote: > * ardi <ardillasdelmonte@...il.com> [2017-12-06 18:23:33 +0100]: >> Said this, I need IBM double-double in PowerPC targets (using clang as >> compiler), and I'd like to use musl because of its well written code. > > is this because of some abi compat issue? > or some source code depends on double-double semantics? It's because I have code that was very well tuned for double-double precision. Of course I'd be happy to be able to work with an IEEE 128bit long double, and I'd use it from the first day if the LLVM compiler team implements it with hardware optimizations for PPC64, but I'd like to have the choice of using double-double if I need to check or compare at some point. >From the comments by Rich, I think maybe it's not hard to get it working. If I find I can get it by patching a few files (maybe conditionally using the code for FP to/from string conversions in Apple libc in my custom musl build), then I'll do it. OTOH, if it requires a lot of editing, I won't doing it, because I want to have an easy procedure for updating musl to newer versions. If I have to apply a huge patchset whenever I update, it wouldn't be reasonable. Thanks!
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