: This paper discusses a software package named SYMCAD, a marketable microcode synthesizer which forms part of a microprogrammed control synthesis in the VLSI CAD system IDEAS (Integrated Design Automation System) [1J. The objective is to synthesize a microprogrammed control for a specified data part and microsequencer to realize the behavior expressed in a hardware description language. A distinctive feature of this approach is the synthesis of a customized control unit suitable for VLSI realization.Retargetable microcode generation comprises symbolic microprogram synthesis, microinstruction format generation and binary microcode generation, to map the required behavior on the specified micro-architecture.
It is widely accepted that use of an Application Specific Instruction Set Processor (ASIP) in an embedded system can provide a solution which is much more flexible than ASICs and much more efficient than standard processors in terms of performance and power consumption. However a lack of an acceptable design methodology and supporting tools for ASIPs limits their use even today. We present in this paper a methodology for design space exploration of high performance VLIW ASIPs by modeling Application Specific Functional Units in Trimaran Compiler Infrastructure. To demonstrate the effectiveness of our strategy we consider two important applications FFT and Kalman Filter and perform compute intensive operations in these applications via special Functional Units. The results we obtain are very promising with up to 2x speed improvement.
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