%T A Programming Language for Hardware/Software Co\-Design
%A D. R. Watt, David May
%E Alan G. Chalmers, Majid Mirmehdi, Henk Muller
%B Communicating Process Architectures 2001
%X We have developed a programming language that allows
programs to be expressed as single specifications in which
any number of processes may be tagged for hardware
compilation and the rest are compiled into software. We
introduce a number of novel transformations that may be
arbitrarily applied to an occam process in order to
decompose it into two semantically equivalent concurrent
processes. Our compiler targets hardware by compiling one of
these processes into a field programmable gate array and the
other into x86 object code. Furthermore, the compiler
integrates a specialised communications protocol between the
two programs that consists of a full\-duplex channel
implementation, multiplexor and buffers that are dependent
on the program structure and that guarantee all external
communications are free from deadlock. We demonstrate the
elegance of our language and the power of our compiler on a
small benchmark program.
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