Text edition circuit and method

Abstract

The invention relates to a message editing circuit, comprising message input end, message transmission engine module, message editing module and message output end, connected in sequence, where message editing instruction set is constructed in the message transmission engine module, and a look-up table is constructed in the message editing module. And the invention also relates to a message editing method, where input message firstly enters a transmission engine and is transmitted by transmission table, it uses the message editing instruction set to analyze and generate message editing instructions, and the message editing module makes message editing instruction translation in contrast with the lool-up table and executes message editing action and makes bit sequence regulation and then outputs the edited message. And the look-up table can be implemented by dual port RAM, the contents of the look-up table is configured by CPU, and the look-up table can also be implemented by ROM and is updated, regularly. And the invention simplifies message editing action, and can save large numbers of required resources for logic determination and implement programmable message editing, and has good extensibility.

Description

technical field [0001] The invention relates to data processing technology, in particular to a message editing circuit and method. Background technique [0002] The message editing module is the key module of the data feature chip, which realizes the editing function of the message. With the continuous development of data services, the complexity of message editing is getting higher and higher, and the types of message editing that need to be supported are becoming more and more many. For example, the data feature chip that implements mpls forwarding, mpls forwarding is based on label switching, and the packet forwarding route is determined according to the label. The chip needs to add labels, delete labels, and exchange labels for the message. A must-have feature of a chip. [0003] The current message editing circuit, as shown in FIG. 1 , includes a sequentially connected message input terminal, a message forwarding engine module, a message editing module and a message o...

AI Technical Summary

Problems solved by technology

[0010] In this message editing method, the message editing action logic translator performs logical translation on the message editing action, which needs to occupy a large amount of logic resources, because each message editing action needs to be logically judged separately, and due to the Text editing changes the structure of the original message, and the position of status signals such as the packet header indicator must be adjusted accordingly, and the position of the new packet header indicator needs to be calculated. Therefore, when the number of message editing types increases, the consumed chip resour

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