Date: Thu, 31 Oct 2013 11:09:22 -0400 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: freebsd-numerics@freebsd.org Subject: Re: Representation of 128 bit floating point numbers in FreeBSD amd64 and Clang Message-ID: <CAOgwaMswq2Uj=gwqFYWUMkcMP1YBYGQOavp2eUW1Z2buernVcw@mail.gmail.com> In-Reply-To: <20131031143832.GA60432@troutmask.apl.washington.edu> References: <CAOgwaMs=NKfDpjOY9=5%2BKYFUdbzeMpxMF_nxZP21y8RTb_cR9w@mail.gmail.com> <20131031143832.GA60432@troutmask.apl.washington.edu>
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On Thu, Oct 31, 2013 at 10:38 AM, Steve Kargl < sgk@troutmask.apl.washington.edu> wrote: > On Thu, Oct 31, 2013 at 09:27:34AM -0400, Mehmet Erol Sanliturk wrote: > > > > In FreeBSD amd64 and Clang , > > how can I represent 128 bits ( 34 digits ) variables ? > > > > Not sure it can be done with clang, but GCC supports > a __float128 type. GCC refers to this as its TCmode. > gfortran, the Fortran compiler that supports REAL(16), > uses __float128 internally. I've never directly used > __float128, so can't help beyond this. > > If you need 128-bits in C on ia32 or x86_64 hardware, > you should probably look into using mpfr and mpc. > > -- > Steve > These are defined in the following library : http://gcc.gnu.org/onlinedocs/libquadmath/ ( GCC libquadmath ) For printing values , the following is required : http://gcc.gnu.org/onlinedocs/libquadmath/quadmath_005fsnprintf.html I could not find Clang libquadmath . Thank you very much . Mehmet Erol Sanliturk
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