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Lexical

開(kāi)放式匯編器系統(tǒng)的設(shè)計(jì)

匯編器在微處理器的驗(yàn)證和應(yīng)用中舉足輕重，如何設(shè)計(jì)通用的匯編器一直是研究的熱點(diǎn)之一。本文提出了一種開(kāi)放式的匯編器系統(tǒng)設(shè)計(jì)思想，在匯編語(yǔ)言與機(jī)器語(yǔ)言間插入中間代碼CMDL（code mapping description language）語(yǔ)言，打破匯編語(yǔ)言與機(jī)器語(yǔ)言的直接映射關(guān)系，由此建立起一套描述匯編語(yǔ)言與機(jī)器語(yǔ)言的開(kāi)放式映射體系。基于此開(kāi)放式映射體系開(kāi)發(fā)了一套匯編器系統(tǒng)，具有較高層次上的通用性和可移植性。【關(guān)鍵詞】指令集，CMDL，匯編器，開(kāi)放式 Design of Retargetable Assembler System Liu Ling Feng Wen Nan Wang Ying Chun Jiang An Ping Ji Li Jiu IME of Peking University, 100871【摘要】An assembler plays a very important role in the field of microprocessor verifications and applications, thus how to build a retargetable assembler system has been a hotspot in this field for long time. This paper presents a new method about the retargetable assembler system design.It provides a kind of language CMDL, code mapping description language. During the process of assembling, assembler languages are firstly translated to CMDL, and then mapped to the machine codes. In an other word, CMDL is inserted between assembler languages and machine codes during the translation procedure. As a medium code, CMDL has a lot of features, such as high extraction, strong descript capabilities. It can describe almost all attributes of assembler languages. By breaking the direct mapping relationship between assembler languages and machine codes, the complexities of machine codes are hided to the users, therefore, the new retargetable assembler system has higher retargetable level by converting the mapping from assembler languages and machine codes to assembler languages and CMDL, and implementationof it becomes easier. Based on the new mapping system structure, a retargetable assemblersystem is developed. It proved the whole system has good retargetability and implantability.【關(guān)鍵詞】instruction set, symbol table, assembler, Lexical analysis, retargetability

標(biāo)簽： 開(kāi)放式匯編器

上傳時(shí)間： 2013-10-10

上傳用戶：meiguiweishi
Full support for extended regular expressions (those with intersection and complement); Support for

Full support for extended regular expressions (those with intersection and complement); Support for some kinds of cycles in grammar; DFA-based operation; Unicode support; C++ only, requires a modern compiler; Lexical analyzers can be configured to get symbols from any input class (built-in support for std::istream, std::wistream and FILE *); Designed to work with Whale, but can work standalone or interface to other parsers.

標(biāo)簽： intersection expressions complement for

上傳時(shí)間： 2013-12-11

上傳用戶：zhanditian
計(jì)算所漢語(yǔ)詞法分析系統(tǒng)ICTCLAS介紹詞是最小的能夠獨(dú)立活動(dòng)的有意義的語(yǔ)言成分。但漢語(yǔ)是以字為基本的書寫單位

計(jì)算所漢語(yǔ)詞法分析系統(tǒng)ICTCLAS介紹詞是最小的能夠獨(dú)立活動(dòng)的有意義的語(yǔ)言成分。但漢語(yǔ)是以字為基本的書寫單位，詞語(yǔ)之間沒(méi)有明顯的區(qū)分標(biāo)記，因此，中文詞語(yǔ)分析是中文信息處理的基礎(chǔ)與關(guān)鍵。為此,我們中國(guó)科學(xué)院計(jì)算技術(shù)研究所在多年研究基礎(chǔ)上，耗時(shí)一年研制出了漢語(yǔ)詞法分析系統(tǒng)ICTCLAS(Institute of Computing Technology, Chinese Lexical Analysis System)，該系統(tǒng)的功能有：中文分詞；詞性標(biāo)注；未登錄詞識(shí)別。分詞正確率高達(dá)97%以上，未登錄詞識(shí)別召回率均高于90%，其中中國(guó)人名的識(shí)別召回率接近98%處理速度為31.5Kbytes/s。ICTCLAS的特色還在于：可以根據(jù)需要輸出多個(gè)高概率結(jié)果，有多種輸出格式，支持北大詞性標(biāo)注集，973專家組給出的詞性標(biāo)注集合。該系統(tǒng)得到了專家的好評(píng)，并有多篇論文在國(guó)內(nèi)外發(fā)表。計(jì)算所漢語(yǔ)詞法分析系統(tǒng)ICTCLAS同時(shí)還提供一套完整的動(dòng)態(tài)連接庫(kù)ICTCLAS.dll和相應(yīng)的概率詞典,開(kāi)發(fā)者可以完全忽略漢語(yǔ)詞法分析，直接在自己的系統(tǒng)中調(diào)用ICTCLAS，ICTCLAS可以根據(jù)需要輸出多個(gè)高概率的結(jié)果，輸出格式也可以定制，開(kāi)發(fā)者在分詞和詞性標(biāo)注的基礎(chǔ)上繼續(xù)上層開(kāi)發(fā)。

標(biāo)簽： ICTCLAS 漢語(yǔ) 分計(jì)算

上傳時(shí)間： 2014-01-02

上傳用戶：15736969615
此程序共有兩個(gè)類

此程序共有兩個(gè)類，Lexical進(jìn)行詞法分析，Syntax進(jìn)行語(yǔ)法分析.對(duì)于語(yǔ)法分析，采用LR(1)分析法，判斷程序是否滿足規(guī)定的結(jié)構(gòu)

標(biāo)簽： 程序

上傳時(shí)間： 2014-01-01

上傳用戶：偷心的海盜
語(yǔ)法分析器此程序共有兩個(gè)類

語(yǔ)法分析器此程序共有兩個(gè)類，Lexical進(jìn)行詞法分析，Syntax進(jìn)行語(yǔ)法分析.對(duì)于語(yǔ)法分析，采用LR(1)分析法，判斷程序是否滿足規(guī)定的結(jié)構(gòu).

標(biāo)簽： 語(yǔ)法分析器程序

上傳時(shí)間： 2013-12-04

上傳用戶：四只眼
一個(gè)詞法分析編譯器

一個(gè)詞法分析編譯器，可以供學(xué)習(xí)之用。A Lexical analysis compiler can be used for learning，C-C

標(biāo)簽： 分編譯器

上傳時(shí)間： 2013-12-10

上傳用戶：zhengjian
算符優(yōu)先文法分析的c語(yǔ)言實(shí)現(xiàn)代碼需要輸入詞法分析的txt結(jié)果文件- The operator first grammar analysis c language realization code n

算符優(yōu)先文法分析的c語(yǔ)言實(shí)現(xiàn)代碼需要輸入詞法分析的txt結(jié)果文件- The operator first grammar analysis c language realization code needs to input the Lexical analysis the txt result document

標(biāo)簽： realization analysis operator language

上傳時(shí)間： 2015-12-28

上傳用戶：youlongjian0
Ictclas分詞系統(tǒng)

Ictclas分詞系統(tǒng)，文詞法分析是中文信息處理的基礎(chǔ)與關(guān)鍵。中國(guó)科學(xué)院計(jì)算技術(shù)研究所在多年研究工作積累的基礎(chǔ)上，研制出了漢語(yǔ)詞法分析系統(tǒng)ICTCLAS(Institute of Computing Technology, Chinese Lexical Analysis System)

標(biāo)簽： Ictclas 分

上傳時(shí)間： 2017-02-18

上傳用戶：569342831
This is an implementation of double-array structure for representing trie, as proposed by Junichi A

This is an implementation of double-array structure for representing trie, as proposed by Junichi Aoe [1]. Trie is a kind of digital search tree, an efficient indexing method with O(1) time complexity for searching. Comparably as efficient as hashing, trie also provides flexibility on incremental matching and key spelling manipulation. This makes it ideal for Lexical analyzers, as well as spelling dictionaries. See the details of the implementation at [2]: http://linux.thai.net/~thep/datrie/datrie.html Historically, this was first implemented as C++ classes in a library called midatrie [2], but later simplified and rewritten from scratch in C.

標(biāo)簽： implementation double-array representing structure

上傳時(shí)間： 2013-12-10

上傳用戶：shinesyh