  This paper presents a stream processor generator, called SPGen, for
FPGA-based system-on-chip platforms. In our research project, we use an FPGA as
a common platform for applications ranging from HPC to embedded/robotics
computing. Pipelining in application-specific stream processors brings FPGAs
power-efficient and high-performance computing. However, poor productivity in
developing custom pipelines prevents the reconfigurable platform from being
widely and easily used. SPGen aims at assisting developers to design and
implement high-throughput stream processors by generating their HDL codes with
our domain-specific high-level stream processing description, called SPD.With
an example of fluid dynamics computation, we validate SPD for describing a real
application and verify SPGen for synthesis with a pipelined data-flow graph. We
also demonstrate that SPGen allows us to easily explore a design space for
finding better implementation than a hand-designed one.
