__inline is a vendor specific spelling for inline. clang and gcc treat it the
same as inline, and is available in MSVC 2013 which does not implement C99
(VS2015 supports the inline keyword though). This will allow us to build the
builtins using MSVC.
llvm-svn: 249953
80bit Intel/PPC long double is excluded due to lacking support
for the abstraction. Consistently provide saturation logic.
Extend to long double on 128bit IEEE extended platforms.
Initial patch with test cases from GuanHong Liu.
Reviewed by Steve Canon.
Differential Revision: http://reviews.llvm.org/D2804
llvm-svn: 231965