A Circular Buffer Based on Delayed Update of Pointers

Abstract

A loop buffer on the basis of pointer delay updating comprises a buffer module, a creating pointer circuit, a reading pointer circuit, a creating pointer freezing circuit and a reading pointer freezing circuit, wherein the buffer module comprises a buffer unit, a full-load comparator and a no-load comparator; the creating pointer circuit is used for selecting the buffer unit of write-in data; the reading pointer circuit is used for selecting the buffer unit of the read data; the creating pointer freezing circuit is connected with the creating pointer circuit and freezes moving of a creating pointer, the reading pointer freezer circuit is connected with the reading pointer circuit and freezes moving of the reading pointer; the creating pointer freezing circuit and the reading pointer freezing circuit receive freezing start / stop requests and outputs creating pointer delay updating signals and reading pointer delay updating signals, and moving of the creating pointer and the reading pointer are frozen when creating requests and reading requests of the loop buffer are received. By the loop buffer, peak power consumption and average power consumption are effectively controlled, and resource utilization efficiency is high.

Description

technical field [0001] The invention relates to the field of data processors, in particular to a circular buffer. Background technique [0002] There are a large number of circular buffers with different functions in the data processor, such as the instruction circular buffer (Instruction Buffer) used to cache prefetch instructions in the fetch stage, and the reordering circular buffer (Instruction Buffer) used to control the sequential submission of instructions in the write-back stage. Reorder Buffer) and the write-back circular buffer (Write Buffer) used to accelerate the write-back of storage instructions in the bus interface unit. The traditional circular buffer adopts a real-time update mechanism whether it is creating pointers or reading pointers. [0003] refer to figure 1 As shown, a conventional circular buffer 10 includes a buffer 12 , a create pointer circuit 14 and a read pointer circuit 16 . When the buffer 12 receives the creation request, the request is st...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of existing circular buffers that cannot control peak power consumption and average power consumption and low resource utilization efficiency, the present invention provides a pointer-based delay that effectively controls peak power consumption and average power consumption and has high resource utilization efficiency. updated circular buffer

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