Hardware circular processing method and system of processor

Abstract

The invention provides a hardware circular processing method and system of a processor. Circular buffering is increased in an original fetch unit; first N commands in a corresponding circular body are directly output to a subsequent decoding unit through the circular buffering, and a condition that an extra waiting period caused by the fact that the reading of data in a program memory is delayed during each skipping to a first command of the circular body from a final command of the circular body in a circular processing process is eliminated, so that zero-delaying skipping of hardware circulation is realized. The method provided by the invention has a simple design, and only one hardware circular buffering and a corresponding selection module need to be increased in an original system to realize the zero-delaying skipping of the hardware circulation. Furthermore, the access of the fetch unit on the program memory can also be reduced by utilizing the method so that the power consumption of the processor is reduced.

Description

technical field [0001] The invention relates to a hardware loop processing technology, in particular to a hardware loop processing technology improved for processor or DSP addressing level architecture. Background technique [0002] Loops are a very common type of program in a processor or DSP. In the prior art, common jump instructions are usually used in conjunction with general-purpose registers to implement loop processing. However, at the end of the loop body, this processing method needs to use additional instructions to judge whether the loop is over. If it is not over, it needs to use the jump instruction to jump to the first instruction of the loop body, which will bring inconvenience to the loop body. Less additional cycles. Especially in the case of loop nesting, the operation efficiency will be greatly impaired. [0003] In order to improve the execution efficiency of the loop, at present, some processors or DSPs start to use the hardware loop to process the l...

AI Technical Summary

Problems solved by technology

Although this method no longer uses additional judgment instructions and jump instructions, due to the delay in the program memory, it still needs additional waiting every time it jumps from the last instruction of the loop body to the first instruction of the loop body cycle to read the first instruction of the loop body

In this case, if there are fewer instructions in the loop body, these additional wait cycles will still have a serious impact on the efficiency of the loop

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