JP2017062746A - Document generation device, generation method for document, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a target language program with high readability under the consideration of maintainability by outputting an other language program obtained by converting an assembler program and comments in association.SOLUTION: A document generation device 1 includes: a comment source information storage part 114 for storing comment source information in association with one or more conversion information as information for converting an assembler program into an other language program; a conversion part 122 for converting one or more respective original source components as a partial program constituting an original source of assembler language into an other language program by using the conversion information associated with the respective original source components, and for acquiring target source components as the other language program for each of one or more respective conversion targets; a comment acquisition part 123 for acquiring comments by using comment source information associated with the conversion information; and an output part 13 for outputting one or more respective source components in association with the comments associated with the respective target source components.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a document generation apparatus that generates a useful document related to migration from an assembler program to another language program.

  In the prior art, the operating JCL and file are extracted based on the log of the legacy system, and a data model organized from the COBOL file definition that uses the extracted operating JCL and file is created. Since the data model and the MDA tool are connected, there is a legacy system reconstruction system that can reconstruct a new open system (see, for example, Patent Document 1).

JP 2007-334 (first page, FIG. 1 etc.)

  However, in the prior art, when performing migration for converting an assembler program into a program in another language, the program in another language and a comment cannot be output in association with each other. In the prior art, when migration is performed to convert an assembler program into another language program, the assembler program, the other language program, and the comment cannot be output in association with each other. The other language program is a program in a language other than the assembler, for example, a high-level language program such as C language.

  The document generation apparatus according to the first aspect of the present invention is an assembler program written in an assembler language, and converts an original source storage unit that can store an original source, which is a migration target program, into a program in another language. A conversion information storage unit that can store one or more pieces of conversion information that is information to be used, and a comment that can store comment source information that is a source of a comment in association with any one piece of conversion information of the one or more pieces of conversion information The source information storage unit and one or more source source parts that are part of the source source stored in the source source storage unit are converted into other languages using conversion information corresponding to each source source part. A conversion unit that obtains a target source component that is a program in another language for each one or more conversion targets, and a conversion used by the conversion unit. Corresponds to the comment acquisition unit that acquires comments using the comment source information corresponding to the information, one or more target source components acquired by the conversion unit, and the conversion information used when each target source component is acquired The document generation device includes an output unit that outputs a comment obtained by using the comment source information in association with each other.

  With this configuration, when performing migration for converting an assembler program into a program in another language, the program in another language and an appropriate comment can be output in association with each other.

  Further, in the document generating apparatus according to the second aspect of the present invention, in contrast to the first aspect, the output unit includes one or more target source parts, a comment corresponding to each target source part, and a source of each target source part. This is a document generation device that outputs the original source components constituting the original source in association with each other.

  With this configuration, when performing migration for converting an assembler program into a program in another language, the assembler program, the program in another language, and a comment can be output in association with each other.

  The document generation device of the third aspect of the invention is a condition for specifying a portion for performing processing for improving the readability of the program for the original source with respect to the first or second aspect of the invention. And further comprising a location specifying condition storage unit capable of storing one or more location specifying conditions, and the conversion unit applies each of the one or more location specifying conditions to the original source stored in the original source storage unit, The target source corresponding to the original source part by performing the readability improvement process, which is a process corresponding to the matching part specifying condition and improving the readability of the program, for the original source part corresponding to the matching part specifying condition The comment source information storage unit includes a readability improvement processing unit for acquiring a component, and the comment source information storage unit replaces the comment source information corresponding to the conversion information or the comment source corresponding to the conversion information. In addition to the information, the comment source information associated with any one of the one or more location specifying conditions can be stored, and the comment acquisition unit can provide the comment source corresponding to the location specifying condition used by the readability improvement processing means A comment is acquired using information, and the output unit outputs one or more target source parts acquired by the conversion unit and comments corresponding to the conversion information or location specifying conditions used when each target source part is acquired. This is a document generation device that outputs a comment obtained using original information in association with the comment.

  With this configuration, it is possible to generate a target language program with high readability in consideration of maintainability.

  Further, in the document generation device according to the fourth aspect of the present invention, in contrast to the third aspect of the invention, the location specifying condition is source pattern information that is information related to a program pattern, and the readability improvement processing means is stored in the original source storage unit One or more pieces of source pattern information are applied to stored source sources, and processing corresponding to matching source pattern information is performed on source source parts corresponding to matching source pattern information. This is a document generation device that performs readability improvement processing, which is processing for improving readability, and acquires a target source component corresponding to an original source component.

  With this configuration, an assembler program matching a predetermined pattern can be converted into a target language program with high readability in consideration of maintainability.

  Further, in the document generating apparatus according to the fifth aspect of the invention, in contrast to the fourth aspect of the invention, the source pattern information includes information indicating a dummy section, and the readability improving processing means is stored in the original source storage unit. A document generation apparatus that applies one or more pieces of source pattern information to a source, determines an original source part including a dummy section, and obtains a target source part that defines a structure using the original source part. .

  With this configuration, the dummy section program in the assembler program can be converted into a target language program with high readability in consideration of maintainability.

  The document generation apparatus according to the sixth aspect of the present invention is the same as the fourth aspect of the invention in that the source pattern information includes information indicating that the return has an offset, and the readability improvement processing means is Apply one or more pieces of source pattern information to the stored source source, determine the source source part including the return with offset, and use the source source part as a condition for the offset included in the source source part This is a document generation apparatus that acquires a target source component indicating a branch used in the above.

  With this configuration, it is possible to convert a return processing program having an offset in the assembler program into a target language program having high readability in consideration of maintainability.

  Further, the document generation apparatus according to the seventh aspect of the invention, in contrast to the fourth aspect, specifies an original source part having two or more instructions of an assembler that can convert source pattern information into a program of another language of one instruction. Readability improving processing means applies one or more pieces of source pattern information to the original source stored in the original source storage unit and has two or more instructions. The document generation apparatus obtains a target source component which is a program of another language of one instruction using the original source component.

  With such a configuration, a program composed of two or more instructions in an assembler program that matches a predetermined pattern can be converted into a program of one instruction in a target language with high readability in consideration of maintainability.

  Further, in the document generating apparatus of the eighth invention, in contrast to the fourth invention, the source pattern information includes information indicating a save code or a return code, and the readability improving processing means is stored in the original source storage unit. A document generation apparatus that applies one or more pieces of source pattern information to an original source, determines an original source part of a save code or a return code, and deletes a program corresponding to the original source part from the original source is there.

  With this configuration, the saved code or the return code in the assembler program can be converted into a target language program with high maintainability in consideration of maintainability.

  In the document generation device according to the ninth aspect of the invention, in contrast to the fourth aspect of the invention, the source pattern information is information indicating that a part of two or more loops formed by two or more jump instructions overlap. The readability improving processing means applies one or more pieces of source pattern information to the original source stored in the original source storage unit, determines a portion where two or more loops overlap, This is a document generation device that changes a program corresponding to a location to a program that indicates a loop that does not have a jump instruction by giving priority to one loop that satisfies a predetermined condition.

  With such a configuration, a portion where two or more loops overlap in the assembler program can be converted into a target language program with high readability in consideration of maintainability.

  Further, in the document generation apparatus of the tenth invention, in contrast to the third invention, the location specifying condition is a range condition that is a condition for specifying a range of locations that satisfy a predetermined condition in the original source. The readability improvement processing means applies one or more range conditions to the original source stored in the original source storage unit, and matches the range condition for the location corresponding to the matching range condition. Is a document generation apparatus that performs readability improvement processing that is processing for improving readability of a program.

  With this configuration, it is possible to identify a range of locations that satisfy a predetermined condition in the assembler program, and to convert the program into a target language program having high readability corresponding to the range in consideration of maintainability.

  In the document generation device of the eleventh aspect of the invention, the range condition is a condition for determining the range of programs that cannot be executed, and the readability improvement processing means is the original source. Is a document generation device that statically analyzes the program, identifies the program corresponding to the matching range condition, and deletes the program.

  With this configuration, it is possible to obtain a highly readable target language program by performing static analysis and deleting an assembler program at a location that cannot be reached.

  Further, in the document generation device of the twelfth aspect of the invention, the range condition is a condition for specifying a variable with respect to the tenth aspect of the invention, and the readability improvement processing means reads the variable from the original source or the target source. This is a document generation apparatus that performs readability improvement processing that acquires a life span of a variable and defines the variable as a local variable in the life span.

  With this configuration, it is possible to obtain a program in a target language with high readability by specifying the life span of a variable in the assembler program and using the variable as a local variable in the life span.

  Further, in the document generation device of the thirteenth invention, in contrast to any one of the first to twelfth inventions, the original source has an assembler program and another language program which is a program in a language other than the assembler. It is a program, and further includes an assembler program acquisition unit that acquires an assembler program from an original source, and the conversion unit is a document generation device that converts the assembler program acquired by the assembler program acquisition unit into a target source.

  With this configuration, when migrating an assembler program that operates in conjunction with another language program that is a program in a language other than the assembler, it is possible to generate a target language program with high readability in consideration of maintainability.

  According to the document generation device of the present invention, when performing migration for converting an assembler program into a program of another language, the program of another language and a comment can be output in association with each other.

Block diagram of document generation apparatus 1 in the first embodiment A flowchart for explaining the operation of the document generation apparatus 1 Flow chart explaining the static analysis process Flowchart explaining the output information configuration process Diagram showing the same source Figure showing the same location specific condition management table The figure which shows the program of the same C language which is generated Diagram showing the assembler program Figure showing the conversion information management table The figure which shows the program of the same C language which is generated Figure showing the same location specific condition management table Diagram showing the assembler program The figure which shows the program of the same C language which is generated Diagram showing conversion example including the intermediate representation Diagram showing conversion example including the intermediate representation Diagram showing the processing of the same loop Diagram showing an example of the assembler program to be converted The figure which shows the example of the program of the same C language Diagram showing the processing of the same loop Diagram showing an example of the assembler program to be converted The figure which shows the example of the program of the same C language The figure which shows the example of the program of the same C language Figure showing the same comment source information case management table The figure which shows the output example of the same output information The figure which shows the output example of the same output information Overview of the computer system Block diagram of the computer system

  Hereinafter, embodiments of a document generation device and the like will be described with reference to the drawings. In addition, since the component which attached | subjected the same code | symbol in embodiment performs the same operation | movement, description may be abbreviate | omitted again.

(Embodiment 1)
In the present embodiment, a description will be given of a document generation apparatus that outputs a comment corresponding to a converted program in another language when performing migration for converting the assembler program into a program in another language. Such a document generation device facilitates maintenance of programs in other languages. The other language program is a program in a language other than the assembler.

  Further, in the present embodiment, a document generation apparatus that outputs an assembler program in association with each other will also be described.

  Also, in the present embodiment, a document generation apparatus that performs processing for improving readability on a source string that matches a predetermined source pattern from an assembler program set and stores the document sequence will be described. The predetermined source pattern is, for example, a pattern for specifying a dummy section location, a pattern for specifying a return location having an offset, or a location of two or more instructions of an assembler that can be converted into another language program of one instruction. A pattern for specifying the location of the save code or the return code, a pattern for specifying a location where a part of two or more loops overlap, and the like.

  Also, in the present embodiment, a document generation apparatus that specifies a range of locations that satisfy a predetermined condition in an assembler program set and performs processing corresponding to the locations will be described. The process corresponding to the location is, for example, a deletion process, a process for generating a local variable definition, or the like.

  FIG. 1 is a block diagram of a document generation apparatus 1 in the present embodiment.

  The document generation device 1 includes a storage unit 11, a processing unit 12, and an output unit 13.

  The storage unit 11 includes an original source storage unit 111, a location specifying condition storage unit 112, a conversion information storage unit 113, and a comment source information storage unit 114.

  The processing unit 12 includes an assembler program acquisition unit 121, a conversion unit 122, a comment acquisition unit 123, and an output information configuration unit 124.

  The conversion unit 122 includes a readability improvement processing unit 1221.

  The storage unit 11 can store various types of information. The various types of information include an original source, a part specifying condition, conversion information, comment source information, and the like, which will be described later.

  The original source storage unit 111 can store an original source that is a program to be migrated. The original source usually includes an assembler program written in an assembler language. The original source may be a program having an assembler program and another language program that is a program in a language other than the assembler. Here, the other language program is, for example, a high-level language program. The high-level language is not limited, such as COBOL, C language, C ++, JAVA (registered trademark), or the like. The other language program is, for example, a program that is used by calling an assembler program. The type of assembler in the assembler program is not limited. The assembler may be referred to herein as assembly language. The assembler is an assembler used in, for example, IBM System / 370.

  Further, the original source stored in the original source storage unit 111 may be an intermediate language program (which may be referred to as an intermediate expression) obtained by converting an assembler program described in an assembler language. The intermediate language program is, for example, a group of two or more instructions obtained by decomposing a plurality of processes performed by one instruction of the assembler program into two or more processes. Note that one instruction of the intermediate language program may correspond to one instruction of the assembler program. The process of converting the assembler program into an intermediate language program may be performed by the conversion unit 122 described later, or may be performed by another device.

  The location specifying condition storage unit 112 can store one or more location specifying conditions. The part specifying condition is a condition for specifying a part for performing processing for improving the readability of the program with respect to the original source. The location specifying condition is, for example, source pattern information that is information related to the pattern of the assembler program. The location specifying condition is, for example, a range condition that is a condition for specifying a range of locations that satisfy a predetermined condition in the original source. The location specifying condition storage unit 112 may hold information for converting the assembler program into another language in association with the location specifying condition. The information for converting the assembler program into another language is, for example, other language pattern information related to the program pattern of the other language. The information for converting the assembler program into another language is constituted by, for example, a program for converting the assembler program into another language. The source pattern information includes, for example, information indicating a dummy section, information indicating a return having an offset, and an original source component having two or more instructions of an assembler that can be converted into a program of one language in another language. It may be pattern information for specifying, information indicating a save code or a return code, information indicating that two or more loops formed by two or more jump instructions are overlapped, or the like. Note that the location specifying condition is used when the assembler program is converted into another language, and thus may be considered as a kind of conversion information. In such a case, the location specifying condition storage unit 112 is included in the conversion information storage unit 113.

  The conversion information storage unit 113 can store one or more pieces of conversion information. The conversion information is information for converting an assembler program into a program in another language such as a high-level language. The conversion information is information for program conversion that does not always improve readability. The conversion information includes, for example, assembler pattern information indicating an assembler program pattern and other language pattern information indicating a pattern of another language program. The conversion information is, for example, assembler pattern information indicating an assembler program pattern and a program for converting the assembler program into another language.

  The conversion information may be information for converting an assembler program into another assembler program. In such a case, the other assembler program is usually a program that facilitates conversion to a program in another language.

  The conversion information may be information for converting a program in another language into a program in another language. In such a case, the other language program is usually a program whose readability is improved compared to the original other language program.

  The conversion information may be information for converting an intermediate language program into an assembler program.

  The conversion information may be information for converting an intermediate language program into another intermediate language program. In such a case, the other intermediate language program is usually a program that facilitates conversion to another language program.

  The conversion information includes, for example, “information indicating that a USING instruction other than DECT is deleted” “information indicating that a DROP instruction other than DECT is deleted” “assembler“ M $ variable 1, $ variable 2 ”is C language” $ Variable 1 = information indicating conversion to $ variable 1 * $ variable 2 "" assembler "A $ variable 1, $ variable 2" is converted to C language "$ variable 1 = $ variable 1 + $ variable 2" "Information indicating that". “$ Variable 1” or the like is a character string indicating an arbitrary variable.

  The comment source information storage unit 114 can store one or more comment source information in association with any conversion information in the conversion information storage unit 113. Further, the comment source information storage unit 114 can store one or more comment source information in association with any one of the location specifying conditions in the location specifying condition storage unit 112.

  The comment source information storage unit 114 replaces the comment source information associated with the conversion information, or in addition to the comment source information associated with the conversion information, any one of the one or more location identification conditions The comment source information associated with can be stored.

  The comment source information is information that is a source of the comment. The comment source information is, for example, a character string. The comment source information may be, for example, a character string pattern including a variable into which information in the assembler program is substituted. The comment source information may be, for example, a character string pattern including a variable to which information in another language program is substituted.

  Also, there may be conversion information that does not correspond to comment source information, or there may exist a location specifying condition that does not correspond to comment source information.

  The processing unit 12 performs various processes. The various processes are processes performed by the assembler program acquisition unit 121, the conversion unit 122, the readability improvement processing unit 1221, the comment acquisition unit 123, and the output information configuration unit 124, for example.

  The assembler program acquisition unit 121 acquires an assembler program from the original source. When the original source is a program having an assembler program and another language program, the assembler program acquisition unit 121 extracts the assembler program from the original source. For example, the assembler program acquisition unit 121 uses a character string indicating the start and a character string indicating the end of the assembler program, and a program (character string) between the character string indicating the start and the character string indicating the end. From the original source. For example, the assembler program acquisition unit 121 acquires a file having an extension (for example, “asm”) indicating that it is an assembler program from the original source storage unit 111. Further, for example, the assembler program acquisition unit 121 acquires a program (character string) that matches an instruction or instruction pattern of the assembler program from the original source. In such a case, it is assumed that all instructions or instruction patterns of the assembler program are stored in the storage unit 11.

  The conversion unit 122 converts the original source (here, the assembler program) stored in the original source storage unit 111 into a target source that is a program in another language and is a program in the target language. The target language program is a program in another language such as C language. The process of converting the original source to the target source is not limited to the process of eliminating the original source, and is preferably a process for setting both the original source and the target source. The process of converting the original source into the target source is a process of acquiring the target source from the original source.

  The conversion unit 122 may convert the assembler program acquired by the assembler program acquisition unit 121 into a target source. In such a case, the conversion unit 122 may convert a program other than the assembler program (for example, a program such as Java or COBOL) into a target source. A program other than the assembler program is a program that is not acquired from the original source storage unit 111 by the assembler program acquisition unit 121 and is a program stored in the original source storage unit 111. Since a program for converting a program other than the assembler program into a target source is a known technique, detailed description thereof is omitted.

  The conversion unit 122 may convert the assembler program into a target source using one or more pieces of conversion information. The conversion unit 122 converts the assembler program into a target source using one or more location specifying conditions. That is, for example, the conversion unit 122 converts the location of the program to be converted using the conversion information corresponding to the location specifying condition for the location of the program to be converted that matches the location specifying condition, Get the converted program.

  The program to be converted is usually an assembler program, but may be an intermediate language program or a target source program. The converted program is usually a target source program, but may be an assembler program or an intermediate language program.

  The conversion unit 122 converts one or more original source parts, which are a part of programs constituting the original source stored in the original source storage unit 111, into other languages using conversion information corresponding to each original source part. The target source component which is a program in another language is acquired for each of one or more conversion objects. The target source component is a part of the program that constitutes the target source.

  The conversion unit 122 converts one or more original source parts, which are a part of the assembler program acquired by the assembler program acquisition unit 121, into a program in another language using conversion information corresponding to each original source part. And a target source component that is a program in another language is acquired for each of one or more conversion objects.

  The readability improvement processing unit 1221 performs readability improvement processing that is processing for improving the readability of the program. The readability improving process is, for example, a process of rewriting the definition of the assembler dummy section to the definition of a structure in another language such as C language. The readability improving process is, for example, a process of rewriting a return process having an assembler offset into an appropriate other language program. Further, the readability improving process is a process of rewriting an assembler program of two or more instruction groups into a program of another language of one instruction, for example. The one-language other language program is, for example, an instruction in which one “;” is sufficient in the C language. Further, the readability improving process is a process of deleting a save code or a return code in the assembler program, for example. Further, the readability improving process is a process of rewriting a plurality of loop processes in the assembler program into appropriate other language programs, for example. Further, the readability improving process is a process of deleting a part of the assembler program that cannot be reached, for example. The readability improving process is, for example, a process of checking a life span of a variable in an assembler program and setting it as a local variable in another language.

  The readability improving process is a process of rewriting an assembler program of two or more instruction groups into a program of a target source of two or more instructions, for example. That is, an assembler program of one instruction can be converted into an intermediate language program having two or more instruction groups. Further, an intermediate language program of two or more instruction groups can be converted into a target source program of one or more instructions. In such a case, an assembler program of two or more instruction groups can be rewritten into a program of a target source of two or more instructions. More specifically, if there is an assembler program of two or more instruction groups (ac1, ac2), the first instruction (ac1) of the assembler program is converted into an intermediate language program (mc1, mc2), and the assembler program Is converted to an intermediate language program (mc3, mc4). The first instruction (mc1) of the intermediate language program is converted to the instruction (ts1) of the target source program, and the second and third instructions (mc2, mc3) of the intermediate language program are converted to the target source. It is assumed that the fourth instruction (mc4) of the intermediate language program is converted to the instruction (ts3) of the target source program. In such a case, the assembler program (ac1, ac2) having two instructions is converted into a target source program having three instructions (ts1, ts2, ts3).

  More specifically, the readability improving process applies one or more location specifying conditions to the assembler program included in the original source stored in the original source storage unit 111, and corresponds to the matching location specifying conditions. This is processing corresponding to the location specifying condition that matches the location.

  The first readability improving process is a case where the location specifying condition is source pattern information which is information related to a program pattern. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the assembler program included in the original source stored in the original source storage unit 111, and corresponds to the matching source pattern information. On the other hand, the readability improving process is a process corresponding to the matching source pattern information and improving the readability of the program. The processing corresponding to the matching source pattern information is usually realized by a program.

  The second readability improving process is a case where the location specifying condition is a range condition that is a condition for specifying a range of locations that satisfy a predetermined condition in the original source. In such a case, the readability improvement processing unit 1221 applies one or more range conditions to the assembler program included in the original source stored in the original source storage unit 111, and applies to the portion corresponding to the matching range condition. Thus, the readability improving process, which is a process corresponding to the matching range condition and improving the readability of the program, is performed. The processing corresponding to the matching range condition is usually realized by a program.

  In addition, the range condition is a condition for specifying, for example, a life span in which one focused variable is used. It can be said that the life span is a range of a program in which one focused variable appears. The range condition is a condition for specifying a range of programs that cannot be executed as a result of static analysis of the assembler program, for example.

  The range condition is, for example, a condition for determining a range of a program that cannot be executed, a condition for specifying a variable, or the like.

  (A) Hereinafter, a specific example of the first readability improving process will be described. Examples of the first readability improvement process are the following five (A-1) to (A-5).

  (A-1) This is a case where the source pattern information includes information indicating a dummy section. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines an original source part including a dummy section, and Using a source part, obtain a program in another language that defines the structure.

  (A-2) This is a case where the source pattern information includes information indicating that the return has an offset. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines an original source part including a return having an offset, Using the original source part, a program in another language indicating a branch using an offset included in the program as a condition is acquired.

  (A-3) This is a case where the source pattern information is pattern information for specifying the location of two or more instructions of the assembler that can be converted into a program of another language of one instruction. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines original source parts of two or more instructions, Using the original source part, obtain a program in another language of one instruction.

  (A-4) This is a case where the source pattern information includes information indicating a save code or a return code. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines the original source part of the save code or the return code, The program corresponding to the original source part is deleted from the original source or the target source. The readability improvement processing unit 1221 determines whether the register or variable targeted by the save code or the return code is not used in the function in which the save code or the return code appears. It is preferable to delete the save code or the return code.

  (A-5) This is a case where the source pattern information includes information indicating that two or more loops formed by two or more jump instructions overlap each other. In such a case, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, and finds a place where a part of two or more loops overlap. The program corresponding to the location is changed to a program in another language indicating a loop that does not have a jump instruction, giving priority to one loop that satisfies a predetermined condition.

Here, the predetermined conditions are, for example, the following two (1) and (2).
(1) The bottom is the loop farthest from the starting point.

  In the case of this condition, if there are a plurality of loops, the readability improvement processing unit 1221 gives priority to the loop whose bottom is far from the starting point, and rewrites the portion of the priority loop with a program of a loop in another language. Eliminate jump instructions from loop locations. This is to improve the readability of the program by avoiding jumping into the loop as much as possible when there is a complicated structure. In this case, jumping out of the loop is permitted.

Here, the starting point is the first instruction (also referred to as a line) or a basic block of a program group including a plurality of loops. The bottom is the last instruction (also referred to as a line) or basic block of a program group including a plurality of loops. Furthermore, the loop program in another language is, for example, a program using “while” or “for” in the case of C language.
(2) When there are a plurality of loops having the same bottom, the top of the loop is the loop closest to the starting point.

  In the case of this condition, if there are a plurality of loops having the same bottom, the readability improvement processing unit 1221 gives priority to the loop whose top is closest to the starting point, and rewrites the place of the priority loop to a loop program in another language. The jump instruction is eliminated from the location of the priority loop.

  By performing the migration processing corresponding to this condition, not only the readability is improved, but also the processing is performed from the outer loop, and the entire calculation amount is reduced.

  (B) Hereinafter, a specific example of the second readability improving process will be described. Examples of the second readability improvement process are the following two (B-1) to (B-2).

  (B-1) This is a case where the range condition is a condition for determining the range of a program that cannot be executed. In such a case, the readability improvement processing unit 1221 statically analyzes the original source, identifies a program corresponding to the matching range condition, and deletes the program.

  (B-2) This is a case where the range condition is a condition for specifying a variable. In such a case, the readability improvement processing unit 1221 acquires a variable from the original source or the target source, acquires a life span of the variable, and performs readability improvement processing that defines the variable as a local variable in the life span.

  Note that the readability improvement processing unit 1221 identifies one or more basic blocks that appear for one variable that appears in the original source or the target source, for example. Then, the readability improvement processing unit 1221 defines the identified one or more basic blocks as one function. Then, the readability improvement processing unit 1221 defines the one variable before the instruction of the one function.

  For example, when the other language to be converted is C language, the readability improvement processing unit 1221 obtains, for example, “function_name () {one or more variable definitions; one or more basic block converted instruction sequence;}”, for example. To do. Note that “function_name” is a function name, and it is preferable that the function name generated by the readability improvement processing unit 1221 based on a predetermined rule. The “one or more variable definitions” are, for example, “char variable name;” “int variable name;”, etc., and the readability improvement processing unit 1221 acquires the variable type and variable name according to the C language grammar. And describe. The variable name is preferably determined based on a predetermined rule.

  The readability improvement processing unit 1221 applies one or more location specifying conditions to the original source stored in the original source storage unit 111, and matches the source source parts corresponding to the matching location specifying conditions. The target source component corresponding to the original source component is acquired by performing readability improving processing that is processing corresponding to the location specifying condition to be performed and improving the readability of the program.

  For example, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, and applies to the original source component corresponding to the matching source pattern information. The target source component corresponding to the original source component is obtained by performing the readability improving process, which is a process corresponding to the matching source pattern information and improving the readability of the program.

  For example, the readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines an original source part including a dummy section, and determines the original source part. Is used to obtain the target source part that defines the structure.

  The readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines an original source part including a return having an offset, and the original source part Is used to obtain the target source part indicating the branch using the offset included in the original source part as a condition.

  The readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines an original source part having two or more instructions, and determines the original source part. Is used to obtain a target source component which is a program in another language of one instruction.

  The readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines the original source part of the save code or the return code, and the original source part The program corresponding to is deleted from the original source or the target source.

  The readability improvement processing unit 1221 applies one or more pieces of source pattern information to the original source stored in the original source storage unit 111, determines a portion where two or more loops overlap, The program corresponding to the location is changed to a program indicating a loop that does not have a jump instruction by giving priority to one loop that satisfies a predetermined condition.

  The readability improvement processing unit 1221 applies one or more range conditions to the original source stored in the original source storage unit 111, and sets the matching range condition to a location corresponding to the matching range condition. It is a corresponding process, and a readability improving process, which is a process for improving the readability of the program, is performed.

  The readability improvement processing unit 1221 statically analyzes the original source, specifies a program corresponding to the matching range condition, and deletes the program.

  The readability improvement processing unit 1221 acquires a variable from the original source or the target source, acquires a life span of the variable, and performs a readability improvement process of defining the variable as a local variable in the live life section.

  The comment acquisition unit 123 acquires a comment using comment source information corresponding to the conversion information used by the conversion unit 122.

  The comment acquisition unit 123 acquires a comment using comment source information corresponding to the location specifying condition used by the readability improvement processing unit 1221.

  When the comment source information is a comment, the comment acquisition unit 123 acquires comment source information corresponding to the conversion information or the part specifying condition as a comment. Note that the comment is usually information that describes a program of a corresponding other language. Also, the comment is information that explains, for example, conversion processing for obtaining a target source part from an original source part.

  In addition, when the comment source information is a character string pattern including a variable to which information in the assembler program is substituted, the comment acquisition unit 123 includes one or more variables of the comment source information corresponding to the conversion information or the part specifying condition. Is obtained from the assembler program (original source part), and each of the obtained one or more character strings is substituted into the corresponding variable to obtain a comment that is a character string having no variable.

  The output information configuration unit 124 configures output information that is information to be output. The output information includes the target source component and the comment acquired by the comment acquisition unit 123. This comment is a comment corresponding to the target source component. The output information includes the original source component, the target source component, and the comment acquired by the comment acquisition unit 123. This comment is a comment corresponding to the original source part and the target source part. The output information includes two or more types of information of the original source part, the target source part, and the comment.

  The output unit 13 outputs the output information configured by the output information configuration unit 124.

  The output unit 13 includes one or more target source components acquired by the conversion unit 122 and a comment acquired using comment source information corresponding to the conversion information used when each target source component is acquired. You may output correspondingly.

  The output unit 13 may output one or more target source parts, a comment corresponding to each target source part, and an original source part constituting the original source that is the basis of each target source part in association with each other. good.

  The output unit 13 is acquired using one or more target source components acquired by the conversion unit 122 and the conversion source information used when the target source components are acquired or comment source information corresponding to the location specifying conditions. The comment may be output in association with the comment.

  The output unit 13 is acquired using one or more target source components acquired by the conversion unit 122 and the conversion source information used when the target source components are acquired or comment source information corresponding to the location specifying conditions. The comment may be output in association with the original source component constituting the original source that is the basis of each target source component.

  The output unit 13 may output the target source obtained by conversion by the conversion unit 122. Further, when there is an assembler program that cannot be converted, the output unit 13 may output an error indicating that there is an assembler program that cannot be converted.

  Here, output refers to display on a display, projection using a projector, printing on a printer, transmission to an external device, storage in a recording medium, processing result to another processing device or other program, etc. It is a concept that includes delivery.

  The storage unit 11, the original source storage unit 111, the location specifying condition storage unit 112, the conversion information storage unit 113, and the comment source information storage unit 114 are preferably non-volatile recording media, but are also realized by volatile recording media. Is possible.

  The process in which information is stored in the storage unit 11 or the like is not limited. For example, information may be stored in the storage unit 11 or the like via a recording medium, information transmitted via a communication line or the like may be stored in the storage unit 11 or the like, Alternatively, information input via the input device may be stored in the storage unit 11 or the like.

  The processing unit 12, the assembler program acquisition unit 121, the conversion unit 122, the readability improvement processing unit 1221, the comment acquisition unit 123, the output information configuration unit 124, and the output unit 13 can be usually realized by an MPU, a memory, or the like. The processing procedure of the processing unit 12 or the like is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The output unit 13 may be considered to be realized by, for example, driver software for an output device or driver software for an output device and an output device.

  Next, the operation of the document generation apparatus 1 will be described using the flowchart of FIG.

  (Step S201) The assembler program acquisition unit 121 acquires an assembler program from the original source stored in the original source storage unit 111.

  (Step S202) The conversion unit 122 performs a static analysis process on the assembler program acquired in Step S201. The static analysis process will be described with reference to the flowchart of FIG.

  (Step S203) The conversion unit 122 substitutes 1 for the counter i.

  (Step S204) The conversion unit 122 determines whether or not the i-th basic block exists. If the i-th basic block exists, the process goes to step S205. If the i-th basic block does not exist, the process ends.

  (Step S205) The readability improvement processing unit 1221 substitutes 1 for the counter j.

  (Step S <b> 206) The readability improvement processing unit 1221 determines whether or not the j-th location specifying condition exists in the location specifying condition storage unit 112. If the j-th location specifying condition exists, the process goes to step S207; otherwise, the process goes to step S213.

  (Step S207) The readability improvement processing unit 1221 acquires the j-th location specifying condition from the location specifying condition storage unit 112.

  (Step S208) The readability improvement processing unit 1221 determines whether or not the i-th basic block matches the j-th location specifying condition. If they match, go to step S209; otherwise, go to step S212. It should be noted that even if some assembler programs of the i-th basic block match the j-th location specifying condition, the i-th basic block also matches the j-th location specifying condition. In addition, even if all or part of the intermediate representation (which may be called intermediate code) converted from the assembler program of the i-th basic block matches the j-th location specifying condition, the i-th basic block is Assume that the jth location specifying condition is met.

  (Step S209) The readability improvement processing unit 1221 performs a process corresponding to the jth location specifying condition for a location that matches the jth location specifying condition, and executes a program in another language corresponding to the matched location. get.

  (Step S210) The output information configuration unit 124 etc. performs output information configuration processing. The output information configuration process will be described with reference to the flowchart of FIG.

  (Step S211) The output unit 13 outputs the output information configured in step S210.

  (Step S212) The readability improvement processing unit 1221 determines whether or not all the i-th basic block has been converted into a program in another language. If all i-th basic blocks have been converted, the process goes to step S213. If the i-th basic block includes an unconverted part, the process goes to step S214.

  (Step S213) The converter 122 increments the counter i by one. The process returns to step S204.

  (Step S214) The readability improvement processing unit 1221 increments the counter j by 1. The process returns to step S206.

  (Step S215) The conversion unit 122 substitutes 1 for the counter k.

  (Step S216) The conversion unit 122 determines whether or not the k-th conversion information exists in the conversion information storage unit 113. If the k-th conversion information exists, the process goes to step S217. If the k-th conversion information does not exist, the process goes to step S223.

  (Step S217) The conversion unit 122 determines whether or not the i-th basic block corresponds to the k-th conversion information. If the i-th basic block corresponds to the k-th conversion information, the process goes to step S218, and if not, the process goes to step S222. The fact that the i-th basic block corresponds to the k-th conversion information means that the ith basic block includes at least a part of an assembler program that matches the assembler pattern information included in the conversion information.

  (Step S218) The conversion unit 122 converts the assembler program corresponding to the kth conversion information into a program in another language using the kth conversion information. The conversion unit 122 acquires, for example, an assembler program corresponding to the kth conversion information, using another language pattern information included in the kth conversion information, and a program in another language.

  (Step S219) The output information configuration unit 124 and the like perform output information configuration processing. The output information configuration process will be described with reference to the flowchart of FIG.

  (Step S220) The output unit 13 outputs the output information configured in step S219.

  (Step S221) The conversion unit 122 determines whether or not conversion of all assembler programs included in the i-th basic block has been completed. When the conversion of the i-th basic block is completed, the process goes to step S213, and when the conversion is not completed, the process goes to step S222.

  (Step S222) The conversion unit 122 increments the counter k by 1. The process returns to step S216.

  (Step S223) The output unit 13 outputs an error indicating that there is a program that cannot be converted in the i-th basic block. Go to step S213.

  In the flowchart of FIG. 2, when the source source includes a program in another language other than the assembler language, it is preferable to convert the program in the other language for migration. Such conversion processing can be performed using, for example, known techniques described in Japanese Patent No. 4354514, Japanese Patent No. 4698943, Japanese Patent No. 5124660, Japanese Patent No. 5253115, and the like.

  Next, an example of the static analysis process in step S202 will be described using the flowchart of FIG. Here, the static analysis process is a process for determining a range of basic blocks, a process for generating a link between basic blocks, and a process for specifying a location of a program that cannot be executed.

  (Step S301) The conversion unit 122 substitutes 1 for the counter i and 1 for the counter j.

  (Step S302) The conversion unit 122 determines whether there is an i-th instruction that can be executed next, which is an instruction in the assembler program acquired in Step S201. If the i-th instruction exists, the process goes to step S303, and if the i-th instruction does not exist, the process goes to step S311.

  (Step S303) The conversion unit 122 determines whether or not the i-th instruction is a branch instruction. If it is a branch instruction, the process goes to step S307, and if it is not a branch instruction, the process goes to step S304.

  (Step S304) The conversion unit 122 determines whether there is a possibility of branching from another instruction with respect to the i-th instruction (whether there is an instruction specified as a jump destination). to decide. If there is a possibility of branching from another instruction, the process goes to step S307, and if there is no possibility of branching from another instruction, the process goes to step S305.

  (Step S305) The conversion unit 122 places the i-th in the buffer. The buffer is a work storage area for creating a basic block.

  (Step S306) The conversion unit 122 increments the counter i by 1. The process returns to step S302.

  (Step S307) The conversion unit 122 performs a process of setting one or more instruction groups in the buffer as the jth basic block. Such processing includes, for example, adding “j” to one or more instructions constituting a basic block, linking “j”, or distinguishing one or more instructions constituting a basic block from others. Or storing it in If there is no instruction in the buffer, no processing is performed and the process returns to step S305.

  (Step S308) When there is a link destination from the jth basic block, the conversion unit 122 adds the identifier of the basic block of the link destination to the jth basic block. Such processing may be anything as long as it constitutes information that can determine the control flow between basic blocks.

  (Step S309) The conversion unit 122 deletes the instruction group in the buffer.

  (Step S310) The converter 122 increments the counter j by 1. The process returns to step S305.

  (Step S311) The conversion unit 122 attaches a flag indicating unprocessed to an unprocessed instruction (location). An unprocessed instruction is an instruction that cannot be executed. Further, there is a possibility that an unprocessed instruction does not exist, and in this case, this step is not executed. Return to upper process. In the flowchart of FIG. 3, it is preferable that the readability improvement processing unit 1221 deletes the assembler program at a location with a flag indicating unprocessed.

  Also, the static analysis process shown in the flowchart of FIG. 3 is an example. The process of determining the basic block range, the process of generating a link between the basic blocks, and the location of the program that cannot be executed by different algorithms. You may perform the process for specifying.

  Next, the output information configuration processing in step S210 and step S219 will be described using the flowchart in FIG.

  (Step S401) The output information configuration unit 124 acquires a current original source part. Note that the current original source part is the original source part to be processed.

  (Step S <b> 402) The output information configuration unit 124 acquires the current target source part. Note that the current target source component is the target source component to be processed.

  (Step S403) The comment acquisition unit 123 acquires comment source information corresponding to the part specifying condition or conversion information used when the target source component is acquired from the comment source information storage unit 114.

  (Step S404) The comment acquisition unit 123 assigns 1 to the counter i.

  (Step S405) The comment acquisition unit 123 determines whether or not the i-th variable exists in the comment source information acquired in step S403. If the i-th variable exists, the process goes to step S406. If the i-th variable does not exist, the process goes to step S409.

  (Step S406) The comment acquisition unit 123 acquires a character string corresponding to the i-th variable from the original source component or the target source component.

  (Step S407) The comment acquisition unit 123 substitutes the character string acquired in step S406 into the comment source information acquired in step S403.

  (Step S408) The comment acquisition unit 123 increments the counter i by 1. The process returns to step S405.

  (Step S409) The comment acquisition unit 123 acquires a comment. The comment is a comment source information acquired in step S403 or a character string in which a character string is substituted for all variables in the comment source information.

  (Step S410) The output information configuration unit 124 configures output information including the original source part acquired in Step S401, the target source part acquired in Step S402, and the comment acquired in Step S409. Return to upper process.

  In step S410 of the flowchart of FIG. 4, the output information configuration unit 124 may configure output information having two types of information among the original source part, the target source part, and the comment.

  Hereinafter, a specific operation of the document generation apparatus 1 according to the present embodiment will be described. Now, the migration target assembler program is the IBM assembler. The target language program is a C language program.

  In this situation, the document generation apparatus 1 will be described below using six specific examples. Specific examples 1 to 4 are examples of processing when a C language program is generated from an assembler program. Specific examples 5 to 6 are examples in which output information is configured and output.

(Specific example 1)
Specific example 1 is a specific example of the first readability improving process and the second readability improving process. Specific Example 1 is a case where the source pattern information includes information indicating a dummy section and includes information indicating a save code and a return code. In the first specific example, a case where the range condition is a condition for determining the range of a program that cannot be executed will be described. That is, the specific example 1 corresponds to the above (A-1), (A-4), and (B-1).

  Assume that the original source storage unit 111 stores the original source shown in FIG. The original source is part of an assembler language program.

  Further, it is assumed that the location specifying condition storage unit 112 stores the location specifying condition management table shown in FIG. The location specifying condition management table stores one or more records having “ID”, “location specifying condition”, and “conversion information”. “ID” is information for identifying a record. The “location specifying condition” is information for specifying a conversion target location for performing the readability improving process. The “location specifying condition” may include a “start condition” and an “end condition”. The “start condition” is a condition for specifying the start location of the location that matches the “location specifying condition”. The “end condition” is a condition for specifying the end location of the location that matches the “location specifying condition”. That is, the range between the location that matches the “start condition” and the location that matches the “end condition” is the range specified by the “location specifying condition”. Further, the “location specifying condition” may be only one condition. The “conversion information” may include “assembler” and “other language”. “Assembler” and “other language” mean to generate another language corresponding to “other language” for an instruction or definition that matches “assembler” within the range specified by “location specifying condition”. . The “conversion information” may be information describing processing for change.

  In FIG. 6, “$ 1” of the start condition “$ 1_'DSECT '” of “ID = 1” matches all character strings. That is, for example, the assembler program “PKTDSECT DSECT” matches the start condition “$ 1_'DSECT '”. The end condition of “ID = 1” “CSECT” or “DCECT” or “COM” or “DXD” or “END” or the end of the program is the character string “CSECT” or the character string “DSECT” or the character string. True if it matches "COM" or the string "END" or is at the end of the program. Furthermore, [1-99] of the assembler “$ 2 'DS' 'PL' [1-99]” is any number from 1 to 99, and “$ 2 'DS' 'PL' [1-99” ] "Matches, for example," PKT00 DS PL8 ". The other language “'char' $ 2 ′ ['[1-99]']; '” indicates that “char PKT00 [8];” is generated, for example. Further, the location identification condition “'STM” number', 'number', '$ 1' of “ID = 2” in FIG. 6 indicates that, for example, “STM 13,12, REGSAVEA” matches. That is, “$ 1” matches an arbitrary character string.

  Then, the conversion information of “ID = 2” in FIG. 6 indicates that the variable $ 1 is used to save the register for an instruction that matches “'STM” $ register number 1 ”,“ $ register number 2 ”,“ $ 1 ”. Among the registers specified by $ register number 1 to the register specified by $ register number 1 that point to the address, there is a register whose value is not defined (not used) before the matching instruction. If present, it indicates that an instruction in another language for saving the unused register is not generated. This is because the register is not used. In other words, the conversion information of “ID = 2” indicates that the variable $ 1 is saved in the register for the instruction matching “STM” $ register number 1 ”,“ $ register number 2 ”,“ $ 1 ”. Of the register specified by $ register number 1 to the register specified by $ register number 2, only the register whose value is defined (used) before the instruction Indicates generation of an instruction in another language for saving.

  Also, the conversion information of “ID = 3” in FIG. 6 indicates that the variable $ 1 in “'LM” $ register number 3 ′, ′ $ register number 4 ′, ′ $ 1 ”points to the register saving address. And among registers specified by $ register number 3 to $ register number 4, if there is a register whose value is not referenced (not used) after the instruction, it is used. Indicates that no other language instruction that restores a register that has not been generated is generated. This is because the register is not used. In other words, the conversion information of “ID = 3” indicates that the variable $ 1 in “'LM' $ register number 3 ',' $ register number 4 ',' $ 1" indicates the register saving address. Return to only the register that is pointed to and whose value is referenced (used) after the instruction among the registers specified by $ register number 3 to $ register number 4 Indicates that an instruction in another language is performed.

  Based on the above, it is assumed that the document generation device 1 has started processing. Then, the assembler program acquisition unit 121 acquires the assembler program shown in FIG. 5 from the original source stored in the original source storage unit 111.

  Next, the conversion unit 122 performs a static analysis process on the acquired assembler program. Then, the conversion unit 122 divides the assembler program into basic blocks. Then, the readability improvement processing unit 1221 deletes the assembler program of the unprocessed instruction (location).

  Next, the conversion part 122 converts into C language for every basic block. That is, the readability improvement processing unit 1221 applies the location identification condition of “ID = 1” in FIG. 6 to the assembler program in FIG. 5 and detects a dummy section region that matches the location identification condition. Then, an instruction or definition that matches each “assembler” of the conversion information of “ID = 1” is converted into the C language using the corresponding “other language” information. Then, the readability improvement processing unit 1221 converts the definition of the dummy section of the assembler into the definition of the structure in C language. That is, the readability improvement processing unit 1221 generates the C language program 701 in FIG. 7 by using the assembler program at the location 501 in FIG. 5 and the information of the record of “ID = 1” in FIG.

  Next, the conversion unit 122 applies the location identification condition of “ID = 2” in FIG. 6 to the assembler program in FIG. 5 to detect a save code area. Then, the portion of the save code is deleted so as to match the conversion information of “ID = 2”. Here, it is assumed that the variable “REGSAVEA” is not used in the function in which the save code appears. That is, the readability improvement processing unit 1221 uses the information in the record of “ID = 2” in FIG. 6 as the assembler program at the location 502 in FIG. 5 and the C language program “BB1:;” in 702 in FIG. Is generated. “BB1:” is a label. Further, the conversion unit 122 generates “BB1:” according to a predetermined rule “generate labels at the beginning of all basic blocks”. For example, the conversion unit 122 holds the predetermined rule.

  Next, the conversion unit 122 applies the location identification condition “ID = 3” in FIG. 6 to the assembler program in FIG. 5 to detect the return code area. The part of the return code is deleted so as to match the conversion information of “ID = 3”. Here, it is assumed that the variable “REGSAVEA” is not used in the function in which the return code appears. That is, the readability improvement processing unit 1221 uses the information in the record of “ID = 3” in FIG. 6 for the assembler program at the location 503 in FIG. 5 and the C language program “BB2:;” in 703 in FIG. Is generated. “BB2:” is a label. In addition, the conversion unit 122 generates “BB2:” according to a predetermined rule. For example, the conversion unit 122 holds the predetermined rule.

  Next, another example in which the source pattern information includes information indicating a save code will be described.

  Assume that one instruction of the assembler program included in the original source in the original source storage unit 111 is “STM 5, 8, SAVE”. This one instruction is an instruction for saving the contents of the register 8 from the register 5.

Then, the readability improvement processing means 1221 matches this one instruction with the location identification information “'STM' $ register number 1 ',' $ register number 2 ',' $ 1" of "ID = 2" in FIG. Judge. Then, the readability improvement processing unit 1221 converts this one instruction into, for example, an intermediate representation that saves the contents of the register 5 (r5), register 6 (r6), register 7 (r7), and register 8 (r8). This intermediate representation is, for example:
store (r5, SAVE);
tmp1 = SAVE + 4;
store (r6, tmp1);
tmp2 = SAVE + 8;
store (r7, tmp2);
tmp3 = SAVE + 12;
store (r8, tmp3);

  This intermediate expression is an instruction group that saves the values of the registers r5 to r8 without shifting by 4 bytes starting from the address indicated by the variable “SAVE”.

  Next, it is assumed that the readability improvement processing unit 1221 determines that, for example, only the register 5 among the registers 5 to 8 is used before the instruction “STM 5, 8, SAVE”.

  Next, the readability improvement processing unit 1221 generates a target source that saves only the value of the register 5 (r5) in the above intermediate representation. In other words, the readability improvement processing unit 1221 uses the above-described intermediate representation, the instruction group “tmp1 = SAVE + 4; store (r6, tmp1); tmp2 = SAVE + 8; (r7, tmp2); tmp3 = SAVE + 12; store (r8, tmp3); "is deleted. Then, the readability improvement processing unit 1221 obtains an intermediate expression “store (r5, SAVE);”.

Next, the readability improvement processing unit 1221 converts the intermediate expression “store (r5, SAVE);” into the target source “* (unit32_t *) SAVE = r5;”. Then, the readability improvement processing unit 1221 finally obtains an instruction “* (unit32_t *) SAVE = r5;” of the C language program. (Specific example 2)
Specific example 2 is also a specific example of the first readability improving process. Specific example 2 is a case where the source pattern information includes information indicating that the return has an offset. That is, the specific example 2 corresponds to the above (A-2).

  Assume that the assembler program included in the original source in the original source storage unit 111 is the assembler program shown in FIG. The instruction 801 in FIG. 8 is a call instruction for the subroutine PROC1. An instruction 801 stores the return address (next instruction 802) in a register (register identified by 14) and jumps to PROC1 in 805. Reference numeral 802 denotes a jump to a place (804 instruction) when 8 bytes are added to its own address (*). Reference numeral 806 denotes a return instruction from the subroutine. An instruction 806 jumps to the address of register 14 + 4 (offset) (the position of the instruction 803).

  The storage unit 11 stores a conversion information management table shown in FIG. The conversion information management table has one or more records having “ID”, “location specifying condition”, “application condition”, and “conversion information”. “ID” is information for identifying a record. “Applied condition” is a condition to which “conversion information” is applied, and is a condition added to the location specifying condition. It can be said that the “applicable condition” is a condition further added to the location specifying condition. Also, the application condition “ID = 2” “when the final part of the subroutine of $ 4 is the location specifying condition of“ ID = 1 ”” means that the final part of the subroutine specified by the variable $ 4 is “B $ 1”. (, $ 2) ". In addition, in the conversion information of “ID = 2”, a character string including a $ label can correspond to an arbitrary label. For the $ label, the readability improvement processing unit 1221 generates a unique label for different character strings including the $ label. Two $ labels X are replaced with the same label.

  Then, the readability improvement processing unit 1221 determines that the instructions 801 to 804 in the assembler program in FIG. 8 match the location specifying condition of “ID = 2” in FIG. 9.

  Further, the readability improvement processing unit 1221 determines that the subroutine after the instruction 805 in the assembler program in FIG. 8 matches the application condition of “ID = 2” in FIG. 9.

  Then, the readability improvement processing unit 1221 applies the conversion information “ID = 2” in FIG. 9 to the instructions 801 to 806 in the assembler program in FIG. 8 to obtain the instructions 1006 from the instructions 1001 in FIG.

  Further, the readability improvement processing unit 1221 determines that the instruction 806 in the assembler program in FIG. 8 matches the location specifying condition of “ID = 1” in FIG. 9.

  Then, the readability improvement processing unit 1221 applies the conversion information “ID = 1” in FIG. 9 to the instruction 806 in the assembler program in FIG. 8 to obtain the instruction 1007 and the instruction 1008 in FIG.

(Specific example 3)
Specific example 3 is also a specific example of the first readability improving process. Specific example 3 is a case in which the source pattern information is pattern information for specifying the location of two or more instructions of the assembler that can be converted into a program of another language of one instruction. That is, the specific example 3 corresponds to the above (A-3).

  Now, the location specifying condition storage unit 112 holds the location specifying condition management table shown in FIG. The location specifying condition management table in FIG. 11 stores one or more records having “ID”, “source pattern information”, and “other language pattern information”. “ID” is information for identifying a record. “Source pattern information” is pattern information for specifying the location of two or more instructions of the assembler. “Other language pattern information” is information indicating a pattern of another language to be converted (here, C language).

  “$ 1” in the source pattern information of “ID = 1” in FIG. 11 is an arbitrary character string, and “$ variable” is information indicating an arbitrary variable or register. The length ($ 1) of the other language pattern information of “ID = 1” indicates the length of the character string $ 1.

  Further, “$ 2” in the source pattern information of “ID = 2” in FIG. 11 is an arbitrary character, and “$ variable” is information indicating an arbitrary variable or register.

  Further, each “$ variable” of the source pattern information of “ID = 3” and “ID = 4” in FIG. 11 is a different variable if the number after the variable is different.

  The original source storage unit 111 stores the assembler program shown in FIG. And

  In such a case, the readability improvement processing unit 1221 determines that the position 1201 in FIG. 12 matches the source pattern information of “ID = 1” in FIG. 11, and displays 1201 according to the other language pattern information of “ID = 1”. 13 to 1301 C language.

  Further, the readability improvement processing unit 1221 determines that the portion 1202 in FIG. 12 matches the source pattern information of “ID = 2” in FIG. 11, and sets 1202 in accordance with the other language pattern information of “ID = 2”. To 1302 C language.

  Further, the readability improvement processing unit 1221 determines that the position 1203 in FIG. 12 matches the source pattern information of “ID = 3” in FIG. 11, and sets 1203 in accordance with the other language pattern information of “ID = 3”. To 1303 C language.

  Further, the readability improvement processing unit 1221 determines that the position 1204 in FIG. 12 matches the source pattern information of “ID = 4” in FIG. 10, and 1204 is changed according to the other language pattern information of “ID = 4”. To 1304 C language.

  As a result of the above processing, the readability improvement processing unit 1221 obtains the C language program of FIG. 13 from the assembler program of FIG.

  The readability improvement processing unit 1221 may convert the assembler program into an intermediate representation and configure a C language program from the intermediate representation. For example, the readability improvement processing unit 1221 converts the assembler 1201 in FIG. 12 (1401 in FIG. 14) into the intermediate representation 1 in 1402 in FIG. A diagram 1404 having a tree structure is 1403. Then, the readability improvement processing unit 1221 converts the tree structure 1403 into a tree structure 1404 of the intermediate representation 2. It is assumed that the storage unit 11 stores information for conversion between tree structures. A tree structure 1404 corresponds to the intermediate representation 2 1405. Then, the readability improvement processing unit 1221 converts the intermediate representation 2 1405 into a C language program 1406. When the intermediate representation 1402 is converted into the C language without converting between the tree structures, a C language program 1407 is obtained.

  Similarly, the readability improvement processing unit 1221 converts the assembler (1501) of 1202 of FIG. 12 into the intermediate representation 1 of 1502 of FIG. A diagram 1503 having a tree structure is 1503. Then, the readability improvement processing unit 1221 converts the tree structure 1503 into a tree structure 1504 of the intermediate representation 2. The tree structure 1504 corresponds to the intermediate representation 2 1505. Then, the readability improvement processing unit 1221 converts the intermediate expression 2 1505 into a C language program 1506. When 1502 is converted into C language, 1505 is obtained.

(Specific example 4)
Specific example 4 is also a specific example of the first readability improving process. Specific example 4 is a case where the source pattern information includes information indicating that two or more loops formed by two or more jump instructions overlap each other. That is, the specific example 4 corresponds to the above (A-5).

  In addition, when a part where two or more loops formed by two or more jump instructions overlap each other exists in the assembler program, the conversion unit 122 (1) gives priority to the loop whose bottom is farthest from the starting point. ”, (2)“ If there are multiple loops with the same bottom, the top gives priority to the loop closest to the starting point ”gives priority to one loop, and this one loop is not a jump instruction, Change to a loop program.

  Now, it is assumed that the conversion unit 122 statically analyzes the assembler program and determines that the assembler program has a link relationship between a plurality of (here, four) basic blocks. Then, it is assumed that the conversion unit 122 has obtained information indicating links between the four basic blocks b1, b2, b3, and b4 illustrated in FIG. The link relationship between the basic blocks indicates the flow of processing between the basic blocks, and indicates that there is a branch when there are two or more links (arrows) that go out from one basic block. Also, 1601 and 1602 in FIG. 16 are links constituting a loop. In FIG. 16A, the loop of 1602 is prioritized according to the condition of (1) “prioritize the loop whose bottom is farthest from the starting point”. That is, the readability improvement processing unit 1221 rewrites the loop 1602 into a C language “for example” sentence, for example, and eliminates the goto sentence. Note that the goto instruction constituting the link 1601 from the basic block b3 to b1 remains.

  More specifically, it is assumed that the assembler program to be converted is the program of FIG. In FIG. 17, L0 and L1 are labels. “BE L0” and “BE L1” are jump instructions. Instructions 1 to 8 are arbitrary instructions.

  Then, it is assumed that the conversion unit 122 statically analyzes the assembler program in FIG. 17 and acquires four basic blocks b1 to b4 from the assembler program.

  Then, in the case of FIG. 17 in which a part of two or more loops overlap, the conversion unit 122 sets the block b4 as the bottom based on (1) “priority is given to the loop whose bottom is farthest from the starting point”. When the loop (the loop 1602 in FIG. 16) is prioritized, the conversion unit 122 acquires the program in FIG. Then, the goto statement 1801 constituting the loop with the b3 block as the bottom remains as it is. However, reference numeral 1801 in FIG. 18A denotes a goto statement that jumps out of the loop, and the degree of decrease in readability is low.

  On the other hand, if the conversion unit 122 prioritizes the loop having the b3 block as the bottom (the loop 1601 in FIG. 16) in the case of FIG. 122 acquires the program of FIG. Then, the goto statement 1802 constituting the loop with the block b4 as the bottom remains as it is. Reference numeral 1802 in FIG. 18B is a goto statement that jumps into the loop, which is not desirable because it significantly reduces readability.

  Further, it is assumed that the conversion unit 122 statically analyzes an assembler program different from the above and determines that the assembler program has a link relationship between a plurality (four in this case) of basic blocks. Then, it is assumed that the conversion unit 122 has obtained information indicating links between the four basic blocks t1, t2, t3, and t4 illustrated in FIG. Further, reference numerals 1901 and 1902 in FIG. 19 denote links forming a loop. In FIG. 19A, the loop of 1901 is prioritized according to the condition of (2) “If there are multiple loops with the same bottom, the top gives priority to the loop closest to the starting point”. That is, the readability improvement processing unit 1221 rewrites the 1901 loop into a C language “for” sentence, for example, and eliminates the goto sentence. Note that the goto instruction constituting the link 1902 from the basic block t4 to t2 remains.

  More specifically, it is assumed that the assembler program to be converted is the program of FIG. In FIG. 20, L0 and L1 are labels. “BE L1” and “B L0” are jump instructions. Instructions 1 to 8 are arbitrary instructions.

  Then, it is assumed that the conversion unit 122 statically analyzes the assembler program in FIG. 20 and acquires four basic blocks t1 to t4 from the assembler program.

  Then, in the case of FIG. 20 where two or more loops overlap each other, the conversion unit 122 is based on (2) “If there are multiple loops with the same bottom, the top gives priority to the loop closest to the starting point”. Thus, when priority is given to the loop with the t1 block at the top (the loop of 1901 in FIG. 19), the conversion unit 122 acquires the program of FIG. Then, other goto statements in 2101 remain as they are. However, since the destination of the goto statement in FIG. 21A exists in the loop, readability does not deteriorate much.

  On the other hand, if the conversion unit 122 prioritizes the loop with the top of the t2 block (loop 1902 in FIG. 19) in the case of FIG. 122 acquires the program shown in FIG. Then, other goto statements in 2102 remain as they are. Since the destination of the goto sentence in FIG. 21B can be an arbitrary part of the program, it is necessary to search for the destination of the goto sentence from the entire program, and the readability is significantly reduced.

  When the conversion unit 122 converts all goto sentences into loops in other languages, the final conversion result is the same regardless of which t1 or t2 is selected as the top, as shown in FIG. However, the amount of calculation is smaller when t1 is selected at the top.

(Specific example 5)
Now, it is assumed that the comment source information storage unit 114 stores the comment source information case management table shown in FIG. The comment source information case management table stores one or more records having “ID” and “comment source information”. “ID” is information for identifying a record. “Comment source information” is a character string or a character string having a variable. The variable is a variable that can store a character string included in the conversion source assembler program, or a variable that can store a character string included in another language after conversion.

  Further, it is assumed that the original source storage unit 111 stores the assembler program of FIG. Further, it is assumed that the location specifying condition storage unit 112 stores the location specifying condition management table shown in FIG.

  In such a situation, it is assumed that the document generation apparatus 1 has started processing. Then, as described in the first specific example, the conversion unit 122 acquires the C language program 701 using the assembler program 501.

  Next, the output information configuration unit 124 acquires an assembler program 501 that is the current original source part.

  Next, the output information configuration unit 124 acquires a C language program 701 that is the current target source part.

  Next, the comment acquisition unit 123 manages the comment source information “'DSECT structure (' $ 1 'DSECT_1)'” corresponding to the location specifying condition used when the target source component is acquired. Get from table. The comment source information is the comment source information of “ID = FIG. 6“ ID = 1 ”” in FIG.

  Next, the comment acquisition unit 123 acquires the character string “PKTDSECT” corresponding to the variable “$ 1” included in the acquired comment source information from the original source component or the target source component.

  Next, the comment acquisition unit 123 substitutes the acquired character string “PKTDSECT” into the acquired comment source information to obtain a comment “DSECT structure (PKTDSECT)”.

  Next, the output information configuration unit 124 configures output information having an original source part, a target source part, and a comment.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2401 in FIG. Note that the output information 2401 in FIG. 24 includes information on “assembler”, “C language”, and “comment”.

  Next, as described in the first specific example, the conversion unit 122 deletes the assembler program 502.

  Next, the output information configuration unit 124 acquires an assembler program 502 that is the current original source part.

  Next, the output information configuration unit 124 does not acquire the C language program that is the current target source part. This is because the assembler program 502 is deleted at the time of conversion, and the C language is not generated.

  Next, the comment acquisition unit 123 acquires the comment source information “determined as a save code and deleted” corresponding to the location specifying condition used when the target source component is acquired from the comment source information management table. This comment source information is the comment source information of “ID = FIG. 6“ ID = 2 ”” in FIG. Since the comment source information does not have a variable, the comment source information is comment information.

  Next, the output information configuration unit 124 configures output information having an original source part, an empty target source part, and a comment.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2402 in FIG.

  Next, as described in the first specific example, the conversion unit 122 deletes the assembler program 503.

  Next, the output information configuration unit 124 acquires an assembler program 503 that is the current original source part.

  Next, the output information configuration unit 124 does not acquire the C language program that is the current target source part.

  Next, the comment acquisition unit 123 acquires comment source information “determined as a return code and deletion” corresponding to the location specifying condition used when the target source component is acquired from the comment source information management table. The comment source information is the comment source information of “ID = FIG. 6“ ID = 3 ”” in FIG. Since the comment source information does not have a variable, the comment source information is comment information.

  Next, the output information configuration unit 124 configures output information having an original source part, an empty target source part, and a comment.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2403 in FIG.

  Thus, the output information of FIG. 24 is output. Note that the output unit 13 normally accumulates the output information of FIG. 24 in the storage unit 11.

(Specific example 6)
Now, it is assumed that the comment source information storage unit 114 stores the comment source information case management table shown in FIG. Further, it is assumed that the original source storage unit 111 stores the assembler program of FIG. Further, it is assumed that the location specifying condition storage unit 112 stores the location specifying condition management table shown in FIG.

  In such a situation, it is assumed that the document generation apparatus 1 has started processing. Then, as described in the specific example 3, the conversion unit 122 acquires the C language program 1301 (see FIG. 13) using the assembler program 1201.

  Next, the output information configuration unit 124 acquires an assembler program 1101 that is the current original source part.

  Next, the output information configuration unit 124 acquires a C language program 1201 which is the current target source part.

  Next, the comment acquisition unit 123 acquires comment source information corresponding to the location specifying condition used when the target source component is acquired from the comment source information management table. The comment source information is the comment source information of “ID = 10“ ID = 1 ”” in FIG.

  Next, the comment acquisition unit 123 acquires character strings “CLC” and “BE” corresponding to the variable “source pattern information. All first character strings” included in the acquired comment source information from the original source component. Then, the comment acquisition unit 123 substitutes the acquired character strings “CLC” and “BE” for the variable “source pattern information. All first character strings” of the comment source information.

  Further, the comment acquisition unit 123 acquires the character string “if” corresponding to the variable “other language pattern information. First character string on the first line” included in the acquired comment source information from the target source component. Then, the comment acquisition unit 123 substitutes the acquired character string “if” into the variable “other language pattern information. First character string in the first line” of the comment source information.

  Then, the comment acquisition unit 123 obtains a comment “convert two or more assembler instructions (CLC, BE) into one C language instruction (if)”. Here, for example, the comment acquisition unit 123 divides a plurality of acquired character strings “CLC” and “BE” with “,”.

  Next, the output information configuration unit 124 configures output information having an original source part, a target source part, and a comment.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2501 in FIG. In FIG. 25, each output information is divided by a line. On the other hand, in FIG. 24, each output information is not separated by a line. That is, it does not matter whether the output information is divided by lines or the like.

  Next, the conversion unit 122 acquires a C language program 1302 using the assembler program 1202.

  Next, the output information configuration unit 124 acquires an assembler program 1202 that is the current original source part.

  Next, the output information configuration unit 124 acquires a C language program 1302 that is the current target source part.

  Next, it is assumed that the comment acquisition unit 123 cannot acquire the comment source information corresponding to the part specifying condition or conversion information used when the target source component is acquired from the comment source information management table. That is, the comment acquisition unit 123 does not acquire a comment.

  Next, the output information configuration unit 124 configures output information having only the original source component and the target source component.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2502 in FIG.

  Next, the conversion unit 122 acquires a C language program 1303 using the assembler program 1203.

  Next, the output information configuration unit 124 acquires an assembler program 1203 that is the current original source part.

  Next, the output information configuration unit 124 acquires a C language program 1303 which is the current target source part.

  Next, the comment acquisition unit 123 acquires comment source information corresponding to the location specifying condition used when the target source component is acquired from the comment source information management table. The comment source information is the comment source information of “drawing 11“ ID = 3 ”” in FIG. The acquired comment source information does not have a variable. That is, this comment source information is comment information.

  Next, the output information configuration unit 124 configures output information having an original source part, a target source part, and a comment.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2503 in FIG.

  Next, the conversion unit 122 acquires a C language program 1304 using the assembler program 1204.

  Next, the output information configuration unit 124 acquires an assembler program 1204 that is the current original source part.

  Next, the output information configuration unit 124 acquires a C language program 1304 that is the current target source part.

  Next, it is assumed that the comment acquisition unit 123 cannot acquire the comment source information corresponding to the part specifying condition or conversion information used when the target source component is acquired from the comment source information management table. That is, the comment acquisition unit 123 does not acquire a comment.

  Next, the output information configuration unit 124 configures output information having only the original source component and the target source component.

  Next, the output unit 13 outputs the configured output information. An example of such output is 2504 in FIG.

  According to specific examples 5 and 6 of the present embodiment, the document generation apparatus 1 outputs three types of information, that is, an assembler, another language, and a comment, in association with each other. However, the document generation apparatus 1 may output two or more types of information in association with each other among the three types of information of assembler, other languages, and comments. In this embodiment, when outputting an assembler or another language, there may or may not be a line number.

  As described above, according to the present embodiment, when migration is performed to convert an assembler program into a program in another language, the program in another language and a comment can be output in association with each other.

  Further, according to the present embodiment, when migration is performed to convert an assembler program into another language program, the assembler program, the other language program, and the comment can be output in association with each other.

  Further, according to the present embodiment, it is possible to generate a target language program with high readability in consideration of maintainability.

  Further, according to the present embodiment, an assembler program matching a predetermined pattern can be converted into a target language program with high readability in consideration of maintainability.

  Also, according to the present embodiment, the dummy section program in the assembler program can be converted into a target language program with high readability in consideration of maintainability.

  Furthermore, according to the present embodiment, a return processing program having an offset in the assembler program can be converted into a target language program having high readability in consideration of maintainability.

  In addition, according to the present embodiment, a program consisting of two or more instructions in an assembler program that matches a predetermined pattern, and a one-instruction program of a target language with high readability in consideration of maintainability Can be converted to

  Further, according to the present embodiment, the save code or the return code in the assembler program can be converted into a target language program with high maintainability in consideration of maintainability.

  Further, according to the present embodiment, a portion where two or more loops in the assembler program overlap each other can be converted into a target language program with high maintainability in consideration of maintainability.

  In addition, according to the present embodiment, a range of locations that satisfy a predetermined condition in an assembler program is identified, and in consideration of maintainability, a program in a target language with high readability corresponding to the range is provided. Can be converted.

  Further, according to the present embodiment, it is possible to obtain a target language program with high readability by performing static analysis and deleting an assembler program at a location that cannot be reached.

  Further, according to the present embodiment, a target language program with high readability can be obtained by specifying a life span of a variable in the assembler program and using the variable as a local variable in the life span.

  Furthermore, according to the present embodiment, when migrating an assembler program that operates in conjunction with another language program that is a language program other than the assembler, the program in the target language with high readability is considered in consideration of maintainability. Can be generated.

  Note that the processing in the present embodiment may be realized by software. Then, this software may be distributed by software download or the like. Further, this software may be recorded and distributed on a recording medium such as a CD-ROM. This also applies to other embodiments in this specification. Note that the software that implements the document generation apparatus 1 according to the present embodiment is the following program. That is, in this program, the computer-accessible recording medium is an assembler program written in an assembler language, and an original source storage unit that can store an original source as a migration target program, and an assembler program in another language A conversion information storage unit that can store one or more pieces of conversion information that is information for conversion into the above program, and comment source information that is a source of a comment in association with any one of the conversion information of the one or more pieces of conversion information Each of the original source parts, which is a part of a program constituting the original source stored in the original source storage unit. Using the conversion information corresponding to the source part, convert it to a program in another language, A conversion unit that acquires a target source component, a comment acquisition unit that acquires a comment using comment source information corresponding to the conversion information used by the conversion unit, and one or more each acquired by the conversion unit A program for functioning as an output unit that outputs a target source component and a comment acquired using the comment source information corresponding to the conversion information used when each target source component is acquired. is there.

  In the above program, the output unit includes the one or more target source parts, a comment corresponding to the target source part, and a source source part constituting the source source from which the target source part is based. Is a program that causes a computer to function.

  In the above program, the recording medium may store one or more location specifying conditions that are conditions for specifying a location for performing processing for improving the readability of the program with respect to the original source. The comment source information storage unit further includes the one or more comment source information instead of the comment source information associated with the conversion information or in addition to the comment source information associated with the conversion information. Comment source information associated with any one of the location specifying conditions can be stored, and the conversion unit specifies each of the one or more locations with respect to the original source stored in the original source storage unit. It is a process corresponding to the matching part specifying condition for the original source part corresponding to the matching part specifying condition by applying the condition, and a process for improving the readability of the program. Readability improvement processing means for acquiring a target source part corresponding to the original source part, and the comment acquisition unit is comment source information corresponding to the location specifying condition used by the readability improvement processing means The output unit corresponds to one or more target source parts acquired by the conversion unit and conversion information or location specifying conditions used when the target source parts are acquired. It is preferable that the program causes a computer to function as an output that is associated with a comment acquired using comment source information.

  Further, in the program, the location specifying condition is source pattern information that is information relating to a pattern of the program, and the readability improvement processing unit performs the above-described processing on the original source stored in the original source storage unit. Applying each of the above source pattern information to the source source part corresponding to the matching source pattern information, the processing corresponding to the matching source pattern information, and the readability improving process that is a process for improving the readability of the program It is preferable that the program is a program that causes a computer to function as the target source part corresponding to the original source part.

  Further, in the above program, the source pattern information includes information indicating a dummy section, and the readability improvement processing unit performs the one or more source patterns on the original source stored in the original source storage unit. It is preferable that the program is a program that causes a computer to function as a program that applies information, determines a location including a dummy section, and changes a program corresponding to the location to a program that defines a structure.

  Further, in the above program, the source pattern information includes information indicating that the return has an offset, and the readability improvement processing unit performs the above-described processing on the original source stored in the original source storage unit with respect to the source Applying each of the above source pattern information, determining a location including a return having an offset, and changing the program corresponding to the location to a program indicating a branch using the offset included in the program as a condition, It is preferable that the program functions a computer.

  Further, in the above program, the source pattern information is pattern information for specifying a location of two or more instructions of an assembler that can be converted into a program of another language of one instruction. The one or more pieces of source pattern information are applied to the original source stored in the original source storage unit, the location of the two or more instructions is determined, and the program corresponding to the location is replaced with one instruction. It is preferable that the program is a program that allows a computer to function as a program to be converted into a language program.

  Further, in the above program, the source pattern information includes information indicating a save code or a return code, and the readability improvement processing unit performs the one or more of the original source stored in the original source storage unit with respect to the original source. It is preferable that each source pattern information is applied, the location of the save code or the return code is determined, and the program corresponding to the location is deleted from the original source so that the computer functions.

  In the above program, the source pattern information includes information indicating that two or more loops formed by two or more jump instructions overlap each other, and the readability improvement processing means includes the original source storage unit. The one or more source pattern information is applied to the original source stored in the file, the part where two or more loops overlap is determined, and the program corresponding to the part is determined in advance. It is preferable that a program that causes a computer to function as a program that gives priority to one loop that satisfies the conditions and changes to a program that indicates a loop that does not have a jump instruction.

  In the above program, the location specifying condition is a range condition that is a condition for specifying a range of locations that satisfy a predetermined condition in the original source, and the readability improvement processing means stores the source source storage. A process corresponding to the matching range condition for a portion corresponding to the matching range condition by applying each of the one or more range conditions to the original source stored in the section, and the readability of the program It is preferable that the program is a program that causes a computer to function as a process for improving readability, which is a process for improving the image quality.

  In the above program, the range condition is a condition for determining a range of the program that cannot be executed, and the readability improvement processing unit statically analyzes the original source and corresponds to the matching range condition. It is preferable that the program that causes the computer to function as the program that identifies the program to be deleted and deletes the program.

  In the above program, the range condition is a condition for specifying a variable, and the readability improvement processing unit acquires a variable from the original source or the target source, acquires a life span of the variable, It is preferable that the program causes a computer to function as a program for improving readability in which a variable is defined as a local variable in the life span.

  In the above program, the original source is a program having an assembler program and another language program that is a program in a language other than the assembler, and the computer is used as an assembler program acquisition unit that acquires the assembler program from the original source. Further, it is preferable that the conversion unit is a program that causes a computer to function as a program that converts the assembler program acquired by the assembler program acquisition unit into a target source.

  FIG. 26 shows the external appearance of a computer that executes the program described in this specification to realize the document generation apparatus 1 and the like according to the various embodiments described above. The above-described embodiments can be realized by computer hardware and a computer program executed thereon. FIG. 26 is an overview diagram of the computer system 300, and FIG. 27 is a block diagram of the system 300.

  In FIG. 26, the computer system 300 includes a computer 301 including a CD-ROM drive 3012, a keyboard 302, a mouse 303, and a monitor 304.

  27, in addition to the CD-ROM drive 3012, the computer 301 includes an MPU 3013, a bus 3014 connected to the MPU 3013 and the CD-ROM drive 3012, a ROM 3015 for storing programs such as a boot-up program, and an MPU 3013. And a RAM 3016 for temporarily storing instructions of the application program and providing a temporary storage space, and a hard disk 3017 for storing the application program, the system program, and data. Although not shown here, the computer 301 may further include a network card that provides connection to a LAN.

  A program that causes the computer system 300 to execute the functions of the document generation apparatus 1 and the like of the above-described embodiment may be stored in the CD-ROM 3101, inserted into the CD-ROM drive 3012, and further transferred to the hard disk 3017. . Alternatively, the program may be transmitted to the computer 301 via a network (not shown) and stored in the hard disk 3017. The program is loaded into the RAM 3016 at the time of execution. The program may be loaded directly from the CD-ROM 3101 or the network.

  The program does not necessarily include an operating system (OS), a third party program, or the like that causes the computer 301 to execute the functions of the document generation apparatus 1 according to the above-described embodiment. The program only needs to include an instruction portion that calls an appropriate function (module) in a controlled manner and obtains a desired result. How the computer system 300 operates is well known and will not be described in detail.

  Further, the computer that executes the program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  Further, in each of the above embodiments, it goes without saying that two or more communication units existing in one apparatus may be physically realized by one medium.

  In each of the above embodiments, each process may be realized by centralized processing by a single device, or may be realized by distributed processing by a plurality of devices.

  The present invention is not limited to the above-described embodiments, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, the document generation apparatus according to the present invention has an effect that, when performing migration for converting an assembler program into a program in another language, the program in another language and a comment can be output in association with each other. It is useful as a migration device.

DESCRIPTION OF SYMBOLS 1 Document production | generation apparatus 11 Storage part 12 Processing part 13 Output part 111 Original source storage part 112 Location specific condition storage part 113 Conversion information storage part 114 Comment source information storage part 121 Assembler program acquisition part 122 Conversion part 123 Comment acquisition part 124 Output information Configuration unit 1221 Readability improvement processing means

Claims (15)

An assembler program written in an assembler language, an original source storage unit capable of storing an original source that is a program to be migrated, and
A conversion information storage unit that can store one or more conversion information that is information for converting an assembler program into a program in another language;
A comment source information storage unit that can store comment source information that is a source of a comment in association with any one of the one or more pieces of conversion information;
One or more original source parts, which are a part of programs constituting the original source stored in the original source storage unit, are converted into a program in another language using conversion information corresponding to each original source part. A conversion unit that acquires a target source component that is a program in another language for each of one or more conversion targets;
A comment acquisition unit that acquires a comment using comment source information corresponding to the conversion information used by the conversion unit;
One or more target source parts acquired by the conversion unit and a comment acquired using the comment source information corresponding to the conversion information used when the target source parts are acquired are output in association with each other A document generation device. The output unit is
2. The one or more target source parts, a comment corresponding to each target source part, and an original source part constituting the original source that is the source of each target source part are output in association with each other. Document generation device. A location specifying condition storage unit that can store one or more location specifying conditions that are conditions for specifying a location for performing processing for improving the readability of the program with respect to the original source,
The converter is
The one or more part specifying conditions are applied to the original source stored in the original source storage unit, and the matching part specifying condition is applied to the original source part corresponding to the matching part specifying condition. A process for improving readability, which is a corresponding process, and a process for improving the readability of the program, and obtains a target source part corresponding to the original source part;
The comment source information storage unit
Instead of the comment source information associated with the conversion information, or in addition to the comment source information associated with the conversion information, the comment source information associated with any one of the one or more location identification conditions Can store
The comment acquisition unit
Obtaining a comment using comment source information corresponding to the location specifying condition used by the readability improvement processing means;
The output unit is
One or more target source components acquired by the conversion unit, and conversion information used when each target source component is acquired or a comment acquired using comment source information corresponding to the location specifying condition 3. The document generation apparatus according to claim 1, wherein the document generation apparatus outputs the data in association with each other. The location specifying condition is source pattern information which is information related to a program pattern,
The readability improvement processing means includes:
The one or more pieces of source pattern information are applied to the original source stored in the original source storage unit, and the matching source pattern information is applied to the source source part corresponding to the matching source pattern information. The document generation apparatus according to claim 3, wherein the target source part corresponding to the original source part is acquired by performing a readability improving process that is a corresponding process and improving the readability of the program. The source pattern information is
Including information indicating the dummy section,
The readability improvement processing means includes:
The one or more pieces of source pattern information are applied to the original source stored in the original source storage unit, an original source part including a dummy section is determined, and a structure is formed using the original source part. The document generation apparatus according to claim 4, wherein a target source part to be defined is acquired. The source pattern information is
Contains information indicating that the return has an offset,
The readability improvement processing means includes:
Applying each of the one or more source pattern information to an original source stored in the original source storage unit, determining an original source part including a return having an offset, and using the original source part, 5. The document generation apparatus according to claim 4, wherein a target source part indicating a branch using an offset included in the original source part as a condition is acquired. The source pattern information is
Pattern information for specifying an original source part having two or more instructions of an assembler that can be converted into a program of another language of one instruction;
The readability improvement processing means includes:
Applying each of the one or more source pattern information to the original source stored in the original source storage unit, determining an original source part having the two or more instructions, using the original source part, The document generation apparatus according to claim 4, wherein a target source component that is a program in another language of one instruction is acquired. The source pattern information is
Including information indicating the evacuation code or return code,
The readability improvement processing means includes:
A program corresponding to the original source part is determined by applying the one or more pieces of source pattern information to the original source stored in the original source storage unit, determining an original source part of the save code or return code, and The document generation device according to claim 4, wherein the document generation device is deleted from the original source. The source pattern information is
Including information indicating that a part of two or more loops formed by two or more jump instructions overlap,
The readability improvement processing means includes:
A program that applies the one or more pieces of source pattern information to the original source stored in the original source storage unit, determines a place where a part of two or more loops overlap, and corresponds to the place The document generation apparatus according to claim 4, wherein the first priority is given to a loop satisfying a predetermined condition and the program is changed to a program indicating a loop having no jump instruction. The location specifying condition is a range condition that is a condition for specifying a range of locations that satisfy a predetermined condition in the original source,
The readability improvement processing means includes:
A process corresponding to the matching range condition for a portion corresponding to the matching range condition by applying each of the one or more range conditions to the source source stored in the source source storage unit The document generation apparatus according to claim 3, wherein a readability improving process that is a process for improving the readability of the program is performed. The range condition is
It is a condition for determining the range of programs that cannot be executed,
The readability improvement processing means includes:
The document generation apparatus according to claim 10, wherein the original source is statically analyzed, a program corresponding to the matching range condition is specified, and the program is deleted. The range condition is
It is a condition to specify the variable,
The readability improvement processing means includes:
The document generation apparatus according to claim 10, wherein a variable is acquired from the original source or the target source, a life span of the variable is obtained, and readability improvement processing is performed to define the variable as a local variable in the life span. The original source is
A program having an assembler program and another language program which is a program in a language other than the assembler,
An assembler program acquisition unit for acquiring an assembler program from the original source;
The converter is
The document generation apparatus according to any one of claims 1 to 12, wherein the assembler program acquired by the assembler program acquisition unit is converted into a target source. The recording medium is
An assembler program written in an assembler language, an original source storage unit capable of storing an original source that is a program to be migrated, and
A conversion information storage unit that can store one or more conversion information that is information for converting an assembler program into a program in another language;
A comment source information storage unit that can store comment source information that is a source of a comment in association with any one of the one or more pieces of conversion information;
A document production method realized by a conversion unit, a comment acquisition unit, and an output unit,
The conversion unit uses one or more original source parts, which are a part of programs constituting the original source stored in the original source storage part, by using conversion information corresponding to each original source part. A conversion step of converting into a language program and obtaining a target source component that is a program in another language for each of one or more conversion objects;
The comment acquisition unit acquires a comment using comment source information corresponding to the conversion information used in the conversion step;
Comments acquired by the output unit using one or more target source components acquired in the conversion step and comment source information corresponding to the conversion information used when the target source components are acquired A document production method comprising: an output step for outputting the information in association with each other. Computer-accessible recording media
An assembler program written in an assembler language, an original source storage unit capable of storing an original source that is a program to be migrated, and
A conversion information storage unit that can store one or more conversion information that is information for converting an assembler program into a program in another language;
A comment source information storage unit that can store comment source information that is a source of a comment in association with any one of the one or more pieces of conversion information;
Computer
One or more original source parts, which are a part of programs constituting the original source stored in the original source storage unit, are converted into a program in another language using conversion information corresponding to each original source part. A conversion unit that acquires a target source component that is a program in another language for each of one or more conversion targets;
A comment acquisition unit that acquires a comment using comment source information corresponding to the conversion information used by the conversion unit;
One or more target source parts acquired by the conversion unit and a comment acquired using the comment source information corresponding to the conversion information used when the target source parts are acquired are output in association with each other A program for functioning as an output unit.

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