This project implments a library for fixed point arithmetic which can be used
in kernel and in user space. The intention for this library is not to reinvent
the wheel again. The intention is to provide simple arithmetics which can be
used everywhere in kernel space. Earlier it the alternative to use the FPU
emulation code was taken into account but this altenative was not followed,
because:
    - there is no reason to emulate a Intel FPU when simple arithmetic
      functions are needed,
    - the emulation of a whole FPU probably introduces overhead
    - this approach would end up in non portable code
    - the attempt to use existing rtlinux kernel modules, which use
      the FPU on a system without FPU (but compiled in FPU emulation)
	  ended in the Message:
	      "Kernel Panic Math Emulation needed in kernel"
	  After that the system was completely hung up and useless.

Very many ideas which can be found in this library are based on thoughts
you can find in the Fix Class found in the GNU C++ Library and on results
of the work of Seehyun Kim and Prof. Wonjong Sung, School of Electrical
Engineering, Seoul National University. Thanks for their work.

If you want to use the normal C Library and thus the FPU in cyclic Tasks
the use of the priority based scheduler contributed by Prof. Paolo Mantegazza
is more convenient and recommended.

The directories contain:

    1. nw      			  - noweb sources, which supply fixed point arithmetic.
    1. src     			  - C/C++-Code, which is generated out of the noweb
                            sources.
    2. include 			  - include file for fixed point arithmetic.
    3. lib     			  - shared libraries, which supply fixed point
                            arithmetic.
    4. bin     			  - kernel modules, which supply fixed point arithmetic.
    5. doc			      - some documentation generated out of the noweb
                            sources.
    6. test               - a simple test applications.
    6. test/measurements  - simple programs which compare the time calculations
							using the fixed point arithmetic library need with
                            their counterpart using the math library (it turns
                            out that the fixed point arithmetic library is a
                            little bit slower).

If you want to make changes to the code it is recommended to edit the noweb
sources (of course other changes are accepted, too). Noweb is a simple,
extensible tool for literate programming and can be downloaded from:
http://www.cs.virginia.edu/~nr/noweb.