On Fri, 19 May 2006, Mark Mitchell wrote: > > No, you can invoke it via using the attribute mode(TI) > Sure, but I'm not worried about that case.
That would be the only class of C or C++ failures that I could easily construct by hand. Although the RTL optimizers will introduce TImode moves and temporary registers, it looks like they won't introduce any arithmetic/logical operations without explicit pattern support from the backend. Hence, it's only things like configure scripts that identify the presence of __int128_t and __uint128_t, and then explicitly use 128-bit operations in their source code that will be affected. This is the source of the libgfortran failure, where the runtime library detects these types are available, and uses them. It's not a problem in the gfortran compiler itself, which treats INTEGER*8, exactly the same way the C/C++ treat __int128_t. If libstdc++-3's configure checked for __int128_t and provided a specialized STL instantiation, it would exhibit the same issue. Roger --
