[cfe-dev] LDBL_EPSILON value

[Tim Shen via cfe-dev]

On Wed, Nov 2, 2016, 11:09 Tania A via cfe-dev <cfe-dev at lists.llvm.org>
wrote:

> There has been some discussion surrounding clang's value of LDBL_EPSILON
> (e.g. see Bugzilla 48341).
>
> clang and GCC both use a "best-case" value of 2^-1074 for epsilon whereas
> IBM's clang-based compiler opts to use the more conservative value of
> 2^-105. I would like to reopen a discussion about possibly redefining
> clang's epsilon value.
>

FWIW, on at least powerpc64le, newer GCC seems to define long double as
double by default. I found a page here:
https://gcc.gnu.org/wiki/Ieee128PowerPC


> - TA
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