Program operating device and digital signal processor - uses marker value hold circuit to reduce number of required operations compared to conventional ones

摘要

The program processing device contains a controller which decodes a program contg. a conditional instruction and generates a command signal, an arithmetic operation arrangement which processes arithmetic operations according to the instruction signal and outputs a marker value corresp. to the result of the arithmetic operation, and a hold device which retains the values for conditional evaluation wrt. the conditional command in the controller. The hold device holds a defined number of marker values in their order of generation, including the last marker value generated by the arithmetic operation arrangement. USE/ADVANTAGE - Eliminates need to repeat operation in order to determine contents of marker which has already been produced and hence reduces number of operations required.