Re: Arithmetic Shift

[Bob Friesenhahn]

On Fri, 10 Dec 2010, Andrew W. Nosenko wrote:
> Excuse me?  Why do you think that preprocessor should match the
> behavior of compiler???

Excuse me?  Why do you think that the behavior of the compiler should 
be consistent? :-)

> Why, why system's /usr/bin/cpp that come from GCC should match to
> Clang's behavior?  Or ICC's behavior?  Remember: Accordingly to your
> logic, if it doesn't match, then it is invalid.  Why?  And if ICC and
> Clang interpret -1 >> 1 differently, then it renders GCC's CPP
> constantly invalid?

Since you mention Clang (LLVM-based) then it is worth pointing out 
that final code generation may be delayed and so it is possible that 
the CPU type finally selected may not match the CPU type on which the 
original tests were executed.  Part of the behavior depends on the 
CPU.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/