Abstract: A system for digital signal processing, configured as a system on chip (SoC), combines a microprocessor core and digital signal processor (DSP) core with floating-point data processing capability. The DSP core can perform operations on floating-point data in a complex domain and is capable of producing real and imaginary arithmetic results simultaneously. This capability allows a single-cycle execution of, for example, FFT butterflies, complex domain simultaneous addition and subtraction, complex multiply accumulate (MULACC), and real domain dual multiply-accumulators (MACs). The SoC may be programmed entirely from a microprocessor programming interface, using calls from a DSP library to execute DSP functions. The cores may also be programmed separately. Capability for programming and simulating the entire SoC are provided by a separate programming environment.

Abstract: A method and system for decompressing a program word that is subsequently delivered to a processor for execution. Program word fields are compressed based on regularities between operations and operands. The resulting microcode, which describes the trajectory of the program, is stored in program memory and fed to dynamic program decompression devices, or dyprodes, which are assembled using registers and multiplexers and are driven by a clock, reset signals, and the microcode. At each cycle, the dyprodes produce an uncompressed field of the program word. The reassembled program word is then passed on to a processor for execution. The use of a dyprode system reduces program memory required to store code and reduces the size of the bus connecting a microprocessor to off-chip program memory.

Abstract: A method and system for decompressing a program word that is subsequently delivered to a processor for execution. Program word fields are compressed based on regularities between operations and operands. The resulting microcode, which describes the trajectory of the program, is stored in program memory and fed to dynamic program decompression devices, or dyprodes, which are assembled using registers and multiplexers and are driven by a clock, reset signals, and the microcode. At each cycle, the dyprodes produce an uncompressed field of the program word. The reassembled program word is then passed on to a processor for execution. The use of a dyprode system reduces program memory required to store code and reduces the size of the bus connecting a microprocessor to off-chip program memory.