Abstract: An illegal address mask method for cores of a DSP includes: S1, initializing a core of a DSP; S2, configuring a start address register and an end address register, and taking an address range defined by the start address register and the end address register as a masked address range; configuring a first comparator and a second comparator to send out illegal address decision signals for instructions within the masked address range; S3, acquiring a PC pointer, and determining whether the PC pointer is located in the masked address range; if so, sending out an illegal address decision signal to stop an operation; if not, performing pre-decoding to obtain a memory access instruction; and S4, determining whether an address of the memory access instruction is located in the masked address range; if so, sending out an illegal address decision signal to stop an operation; otherwise, completing a memory access operation.

Abstract: A two-sided time-sharing driving and acquisition system based on dry contacts comprises k dry contacts, a processor, p acquisition circuits, and m driving circuits. The p acquisition circuits are evenly divided into two groups which are separately disposed at two sides of the k dry contacts. The m driving circuits are separately disposed at the two sides of the k dry contacts. A system fault detection method and the two-sided time-sharing driving and acquisition system have the following advantages: the state of input acquisition circuits and cables monitored in real time during system debugging or running, and faults caused by exceptions of the acquisition circuits and the cables can be reported in time.

Abstract: A method for improving an accuracy of a loop branch prediction algorithm by a bypass circuit, comprising: adding a bypass circuit to a loop branch prediction algorithm; and for three pcs entering a pipeline, enabling pc1 fetched in an if0 stage to enter a hybrid branch predictor, and registering pc1; obtaining branch prediction information in an if1 stage, and making a comparison in an if2 stage to obtain a prediction result, registering the prediction result obtained in the if2 stage, and processing pc2 and pc3 in a same way.

Abstract: A method for improving an accuracy of a loop branch prediction algorithm by a bypass circuit, comprising: adding a bypass circuit to a loop branch prediction algorithm; and for three pcs entering a pipeline, enabling pc1 fetched in an if0 stage to enter a hybrid branch predictor, and registering pc1; obtaining branch prediction information in an if1 stage, and making a comparison in an if2 stage to obtain a prediction result, registering the prediction result obtained in the if2 stage, and processing pc2 and pc3 in a same way.

Abstract: A two-sided time-sharing driving and acquisition system based on dry contacts comprises k dry contacts, a processor, p acquisition circuits, and m driving circuits. The p acquisition circuits are evenly divided into two groups which are separately disposed at two sides of the k dry contacts. The m driving circuits are separately disposed at the two sides of the k dry contacts. A system fault detection method and the two-sided time-sharing driving and acquisition system have the following advantages: the state of input acquisition circuits and cables monitored in real time during system debugging or running, and faults caused by exceptions of the acquisition circuits and the cables can be reported in time.