- x & 3  => x % SC_BITS
- x >> 2 => x / SC_BITS
(after everything is converted to unsigned this should result in the
 exact same code as before).

- x86 extended float mantissa size includes the explicit one now
- fixed broken qnan/snan for x86 extended float
- simplification/tuning

The backends which support rotl now match for or(shl,shr) patterns.

It has been empty for nearly all systems. People who used to put stuff
in config.h can still create a config.h on their own and inject
-include (gcc) or /FI (msvc) into their CPPFLAGS.

Just state the copyright and the project the files belong to. You can
then find the COPYING file for the whole project.

should be mostly bugfree by now and you can still use gdb to trace
calls.