CN103123590A - Compiling method from intermediate language (IL) program to C language program of instruction list - Google Patents
Compiling method from intermediate language (IL) program to C language program of instruction list Download PDFInfo
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Abstract
The invention discloses a compiling method from an intermediate language (IL) program to a C language program of an instruction list. The method comprises the steps: building a middle storage structure syntax tree according to results of lexical analysis and grammatical analysis through logical analysis on a program of the instruction list and logistic mapping relation between semanteme of the instruction list and semanteme of the C language; combining an auxiliary performance function and an auxiliary data structure define file, and generating an integrated file of the C language program through program data of an original instruction list according to a C language programming method, wherein the program data of the original instruction list is stored in the structure of the syntax tree. The generated C language program completely corresponds to the logic program of the original instruction list and has the advantages of a high-level C language, wherein the advantages include strong transportability, strong compatibility and the like. Due to the structure of the syntax tree and an analytic method of semanteme mapping, compiling is standardized and mass-produced, complexity of the compiling is reduced through adoption of functions and modularization of an auxiliary function of a function block, compiling time is shortened, and speed of the whole compiling process is improved.
Description
Technical field
The present invention relates to the technique of compiling field of programmable logic controller (PLC), especially relate to the programming language instruction list IL program of PLC to the Compilation Method of C programmer.
Background technology
Soft PLC technology application in Industry Control is extremely extensive, yet each manufacturer or research unit are all the Complied executing technology for a certain particular system environment exploitation PLC program.This technique of compiling for single running environment lacks versatility, and compatibility can not be transplanted in other computing environment and use.Therefore a kind of portability is strong, and compatible good technique of compiling becomes the active demand of soft PLC technical development.The instruction list that meets the IEC61131-3 standard is text programming language commonly used in soft PLC programming, the C language is the programming language that various computing systems adopts, possess portable strong and compatible good characteristics, meet the object code requirement of soft PLC compiling, and C programmer can be by quick Complied executing under various computer systems.Therefore the technique of compiling from instruction list IL program to C programmer possesses very strong practicality, feasibility and Research Significance.
Summary of the invention
For above-mentioned problem, the present invention proposes a kind of instruction list IL program to the Compilation Method of C programmer, mainly solved in the compilation process logic of IL language has been formed the foundation of parsing, middle syntactic structure, process and auxiliary function and the data structure of generation target language C language, the method has realized a kind of rapidly and efficiently Compilation Method of PLC program to computer advanced language, make again target program have extensive practicality, versatility, can be used for various computing systems.
For realizing purpose of the present invention, the present invention takes following technical scheme:
This instruction list IL program is characterized in that: comprise that step is as follows to the Compilation Method of C programmer:
Adopt lexical analyzer scan instruction list procedure will identify and sort out good vocabulary and give grammatical analysis, grammatical analysis adopts yacc to carry out syntactic reduction to program segment and the statement that meets the instruction list logic, the syntactic reduction result is set up intermediate storage structural grammar tree, the Semantic mapping that this structure draws according to the logical consistency analysis that the instruction list logic forms and the C logic of language forms, the subsidiary function function module of binding function and functional block and the secondary file of definition data structure generate C programmer.
Described grammatical analysis be according to the instruction list logic from the word to the statement, carry out recurrence and constraint from the statement to the program segment, with the constraint result logical block store the intermediate structure syntax tree into.
Described Semantic mapping is to set up a translation module by the semantic congruence sexual intercourse of instruction list and C logic of language, and this module is with corresponding key word, variable, the constant that becomes the C language of the key word, variable, the constant that possess same logical meaning in instruction list and C logic of language unit.
Described subsidiary function function module is to realize possessing the C linguistic function function that can directly call of identical function according to C Programming with Pascal Language method with the function that has the fixed logic function in instruction list and functional block.
The secondary file of described definition data structure is to set up with the method for definition data structure in the C language to meet the structure that power function calls required parameter transmission.
Technique effect of the present invention and advantage:
1. the inventive method is completed the Semantic mapping relation of instruction list IL and C language, target language and source language is realized in full accord.
2. the syntax tree structure of the inventive method foundation, make grammer stipulations and semantic parsing feasible, realized the mass production of compiling.
3. the auxiliary function modularization of the inventive method function and functional block, reduce the source program quantity that needs to compile conversion in actual compilation process, reduced the compiling complexity and shortened compilation time, and the speed of whole compilation process is improved.
4. the final c program that generates of the inventive method possesses portable strong, the compatible characteristics such as good, is applicable to various computing systems, makes later stage Complied executing speed fast, is convenient to realize in digital control system the demand to High-speed machining.
5. the inventive method can be compiled into final C language file in advance and can have the few characteristics of resource occupation for the machine code of calculating, and meets efficient low-consume performance in industrial processes control.
Description of drawings
Fig. 1 is that instruction list IL program is to the compilation process figure of C programmer.
Fig. 2 is the logical analysis figure of instruction list IL program.
Fig. 3 is syntax tree structural drawing in Fig. 1.
Embodiment
Describe in further detail below in conjunction with the diagram the solution of the present invention:
Referring to Fig. 1, instruction list IL program is characterized in that: comprise that step is as follows to the Compilation Method of C programmer:
Adopt lexical analyzer scan instruction list procedure will identify and sort out good vocabulary and give grammatical analysis, grammatical analysis adopts yacc to carry out syntactic reduction to program segment and the statement that meets the instruction list logic, the syntactic reduction result is set up intermediate storage structural grammar tree, the Semantic mapping that this structure draws according to the logical consistency analysis that the instruction list logic forms and the C logic of language forms, the subsidiary function function module of binding function and functional block and the secondary file of definition data structure generate C programmer.
From reading the instruction list IL program that the user edits, through lexical analysis, grammatical analysis, semantic analysis, processing procedure reports an error, in conjunction with subsidiary function power function and data structure definition file, one section complete faultless instruction catalogue program is compiled into complete c program file.
Instruction catalogue program is divided into several block structures, each block structure is segmented again, until be sub-divided into single phrase.
Shown in Figure 1, be whole compilation process, the compilation process from instruction list IL program to C programmer has been described.From the scan instruction list procedure, carry out that morphology identification, grammer stipulations, syntax tree generate, the Semantic mapping process is converted to the C programmer section with the instruction catalogue program compiling.
Performing step:
At first read the user and edit the instruction catalogue program of completing, carry out word scanning.The word that scans according to keywords, constant, symbolic variable, special symbol classify, and will have misspelling or illegal symbol to send into error handler.As LD, ST, SUB, OR, the key words such as RET are operational character, constant, symbolic variable can be used as operational code, and special symbol is as { }, and [], () are classified as a class.Word scanning uses lexical analyzer flex to realize, this instrument can identify according to the vocabulary composition rule that pre-defines the word that scans and sort out, and the word that passes through Classification and Identification is sent to next step and does grammatical analysis.
Described grammatical analysis be according to the instruction list logic from the word to the statement, carry out recurrence and constraint from the statement to the program segment, with the constraint result logical block store the intermediate structure syntax tree into.
Accompanying drawing 2 is seen in grammatical analysis: instruction catalogue program according to the instruction list logical definition, is sent the syntactic definition that does not meet logic into error handler, logical syntactic definition is carried out syntactic reduction and data storage, generative grammar tree.
Stereotyped command table syntax rule is summarized as:
Program segment: logical program section independently begins to finish with END_PROGRAM with PROGRAM.
Variable-definition: the programming personnel are pre-defined to the variable that will use in this program segment.Begin and with one section program that END_VAR finishes, can there is no the variable-definition section in some program with VAR.
Simple statement: the form of operational character+operational code, operational character can be elementary instruction, arithmetic operation instruction and logic instruction, and operational code can the is-symbol variable, numerical value etc.
The bracket statement form is: bracket outer operational character+left side is drawn together symbol+operand+bracket interior instruction list+right side and is drawn together symbol.In bracket, instruction list can be simple statement, can be also the bracket statement, if the bracket statement consists of the multilayer bracket.The combination of a plurality of simple statements can be regarded as in multilayer bracket statement, computing in the bracket statement has priority, the priority of operations of innermost layer is the highest, and therefore the parenthesized expression of every one deck is all the circulation of self in grammatical analysis, i.e. the circulation of the syntactic structure of bracket statement.
Skip instruction: jump instruction+redirect label.
Call statement: call instruction+functional block/function/subroutine title.
The tape label statement: label title+colon+operational character, subroutine call and funcall can use the tape label statement.
Return statement: RET+ numerical value/NULL.
Side of the present invention is as follows to each program segment stipulations method:
program_decl:PROGRAM?pro_name?vardecl?statement_list?END_PROGRAM
{$$＝new?prodecl($2，$3，$4，NULL)；}
First stipulations program segment program_decl, it is by the terminal symbol PROGRAM of expression beginning, the nonterminal symbol pro_name of representation program name, the nonterminal symbol vardecl of expression variable-definition, the nonterminal symbol statement_list of presentation directives's list, the terminal symbol END_PROGRAM stipulations that expression stops form.And for nonterminal symbol, new reduction rule (no longer enumerating) is arranged herein, can successively according to the syntax rule stipulations, until terminal symbol occurs, namely complete the whole syntactic analysis phase.
The syntax tree structure as shown in Figure 3, it is similar that the logic of whole syntax tree structure and instruction list procedure forms, grammaticalness reduction, and can clearly judge each logical block residing position and information of comprising in syntax tree.The syntax tree structure is a tree structure, and internodal contact has represented that grammer is related, logical message of each node storage, and this logical message comprises father node information, child node information, the logical attribute of this node.Leaf node storage minimum logical block, the i.e. information of word.A syntax tree has represented one section complete instruction catalogue program.
Logical syntactic units is carried out semantic processes, and translate into according to the programmed method of target language C language the c program code that meets former logic, by subsidiary function function and the complete c program file of data structure definition file generated.
The root node reductive rule of syntax tree:
In the above example, be institute's canned data in the syntax tree node in braces { }, this node canned data is $ 1 and add_element ($ 2).Each node canned data number and kind are not identical, and namely the information of different node storage Different Logic structures, store the information with identity logic structure in the same class node.
Described Semantic mapping is to set up a translation module by the semantic congruence sexual intercourse of instruction list and C logic of language, and this module is with corresponding key word, variable, the constant that becomes the C language of the key word, variable, the constant that possess same logical meaning in instruction list and C logic of language unit.
Semantic analysis and mapping relations see the following form:
Complete syntax tree structure is in conjunction with the mapping relations of upper table, arranged sequentially according to syntactic reduction, node to whole syntax tree is translated conversion, key word in instruction list, variable, constant compiling are converted to key word, variable, constant in the C language with identity logic, form the C programmer section with former logic function.
Described subsidiary function function module is to realize possessing the C linguistic function function that can directly call of identical function according to C Programming with Pascal Language method with the function that has the fixed logic function in instruction list and functional block.
The secondary file of described definition data structure is to set up with the method for definition data structure in the C language to meet the structure that power function calls required parameter transmission.
The definition of subsidiary function function module and secondary data structure, the function in instruction list and functional block are special constructions, are used for the realization of some fixed logic function.In the present invention, these fixed logic functions are comprised rising edge measuring ability piece, cutter translation function piece, the timer functional block, the counter function piece, the numeral system translation function is written as C linguistic function function, directly calls to get final product when compiler back-end generates the c program file.The variable that needs in function and functional block to use all replaces with formal parameter, transmits actual parameter and calculate in actual invoked procedure.
The below with rising edge measuring ability piece as example:
In compilation process, be written as about the definition of data structure and be the secondary data structure defined file, actual compilation process only needs the simple statement in former instruction catalogue program, skip instruction, band bracket statement, the conventional statement compiling of return statement.
Claims (5)
1. an instruction list IL program to the Compilation Method of C programmer, is characterized in that: comprise that step is as follows:
Adopt lexical analyzer scan instruction list procedure will identify and sort out good vocabulary and give grammatical analysis, grammatical analysis adopts yacc to carry out syntactic reduction to program segment and the statement that meets the instruction list logic, the syntactic reduction result is set up intermediate storage structural grammar tree, the Semantic mapping that this structure draws according to the logical consistency analysis that the instruction list logic forms and the C logic of language forms, the subsidiary function function module of binding function and functional block and the secondary file of definition data structure generate C programmer.
2. by the Compilation Method of instruction list IL program claimed in claim 1 to C programmer, it is characterized in that: described grammatical analysis be according to the instruction list logic from the word to the statement, carry out recurrence and constraint from the statement to the program segment, store the logical block that retrains result into the intermediate structure syntax tree.
3. by the Compilation Method of instruction list IL program claimed in claim 1 to C programmer, it is characterized in that: described Semantic mapping is to set up a translation module by the semantic congruence sexual intercourse of instruction list and C logic of language, and this module is with corresponding key word, variable, the constant that becomes the C language of the key word, variable, the constant that possess same logical meaning in instruction list and C logic of language unit.
4. by the Compilation Method of instruction list IL program claimed in claim 1 to C programmer, it is characterized in that: described subsidiary function function module is to realize possessing the C linguistic function function that can directly call of identical function according to C Programming with Pascal Language method with the function that has the fixed logic function in instruction list and functional block.
5. by the Compilation Method of instruction list IL program claimed in claim 1 to C programmer, it is characterized in that: the secondary file of described definition data structure is to set up with the method for definition data structure in the C language to meet the structure that power function calls required parameter transmission.
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| CN104503754A (en) * | 2014-12-16 | 2015-04-08 | 江南大学 | Programming and compiling design method in robot graphical programming system |
| CN105607569A (en) * | 2015-12-25 | 2016-05-25 | 山东超越数控电子有限公司 | Method and device which converts IL language into ladder chart |
| CN106250775A (en) * | 2016-07-18 | 2016-12-21 | 恒宝股份有限公司 | For the smart card in TEE file management method and management system |
| CN106415495A (en) * | 2014-05-30 | 2017-02-15 | 苹果公司 | Programming system and language for application development |
| CN109254776A (en) * | 2018-09-29 | 2019-01-22 | 深圳市雷赛控制技术有限公司 | Multilingual code compiling method and compiler |
| CN110187885A (en) * | 2019-06-10 | 2019-08-30 | 合肥本源量子计算科技有限责任公司 | A kind of the intermediate code generation method and device of the compiling of quantum program |
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Application publication date: 20130529 |