Program generation apparatus, program generation method, and program for program generation

• US 20050010898A1
• Filed: 07/01/2004
• Published: 01/13/2005
• Est. Priority Date: 07/09/2003
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Takayama, Shuichi, Zhao, Chen, Heishi, Taketo, Ogawa, Hajime
• Application Number:
  US10/880,529
• Publication Number:
  US 20050010898A1
• Time in Patent Office: Days
• US Class Current: 717/106
• CPC Class Codes: G06F 8/30 Creation or generation of source code
• CPC Class Codes: G06F 8/51 Source to source

Abstract

A program generation apparatus according to the present invention includes a translation unit and a generation unit. The translation unit accepts a single HLSL (high level scripting language) script that defines a variety of program structures for programs to be generated, and translates the HLSL script into a plurality of MLSL (middle level scripting language) scripts, each of which describes one of the plurality of program structures defined by the HLSL script, which are different from each other. The generation unit generates programs that respectively correspond to the plurality of MLSL scripts.

Claims

1. A program generation apparatus comprising:

an accepting unit operable to accept a first script that defines a plurality of program structures for programs to be generated; and

a script generating unit operable to generate a plurality of second scripts, each of which describes one of the plurality of program structures defined by the first script, said one of the plurality of program structures being different from each other.

2. The program generation apparatus according to claim 1,

wherein the first script defines the plurality of program structures by indicating a plurality of arrangements of control structures in the programs to be generated,

each of the second scripts describes a program structure that indicates a unique arrangement of one or more of the control structures, and

the script generating unit generates the plurality of second scripts by arranging the control structures based on the plurality of arrangements indicated in the first scrip.

3. The program generation apparatus according to claim 2,

wherein the control structures include a loop structure.

4. The program generation apparatus according to claim 2,

wherein the control structures include a branch structure.

5. The program generation apparatus according to claim 4,

wherein the branch structure includes an if-then branch structure.

6. The program generation apparatus according to claim 4,

wherein the branch structure includes an if-then-else branch structure.

7. The program generation apparatus according to claim 2,

wherein the first script includes an indication of paralleling of the control structures.

8. The program generation apparatus according to claim 2,

wherein the first script includes an indication of nesting of the control structures.

9. The program generation apparatus according to claim 2,

wherein the first script includes an indication of paralleling and nesting of the control structures.

10. The program generation apparatus according to claim 2,

wherein the first script includes an indication of the number of programs to be generated, and

the script generating unit generates the plurality of second scripts, the number of said generated second scripts being indicated in the first script, and said second scripts describing the program structures selected, on a random basis, from among the plurality of program structures defined by the first script.

11. The program generation apparatus according to claim 2,

wherein the script generating unit generates the plurality of second scripts that correspond to all of the plurality of program structures defined by the first script.

12. The program generation apparatus according to claim 1,

wherein the first script further includes a parameter indicating that a specific program statement should be set at a plurality of points in each of the programs, and

the script generating unit puts a mark that represents the parameter at a plurality of points in each of the second scripts.

13. The program generation apparatus according to claim 12,

wherein the specific program statement is an output statement indicating that one of a character string and a variable should be outputted.

14. The program generation apparatus according to claim 12,

wherein the specific program statement is a pair of assignment statements that have data dependency.

15. The program generation apparatus according to claim 1,

wherein the first script includes a first parameter and a second parameter, the first parameter indicating a type of control structures to be set in the programs to be generated, and the second parameter indicating a plurality of arrangements of the control structures,

each of the second scripts describes a program structure that indicates a unique arrangement of one or more of the control structures, and

the script generating unit includes:

a reading unit operable to read the first parameter and the second parameter from the first script; and

a control structure generating unit operable to generate the plurality of second scripts based on the type of control structures indicated by the first parameter and the plurality of arrangements of the control structures indicated by the second parameter.

16. The program generation apparatus according to claim 15,

wherein the first parameter indicates at least one of a loop structure and a branch structure as the type of control structures, and

the second parameter indicates at least one of the following:

a range of numbers of said control structures which should be set in parallel; and

a range of nesting depths of said control structures which should be set as nests.

17. The program generation apparatus according to claim 16,

wherein the control structure generating unit includes:

a complete tree generating unit operable to generate complete tree data indicating a complete tree that corresponds to a complete arrangement that has a maximum number of control structures to be arranged within the range indicated by the second parameter;

a subtree generating unit operable to generate a plurality of subtree data indicating subtrees of the generated complete tree; and

a second script generating unit operable to generate the second scripts, each of which describes a program structure that indicates a unique arrangement of one or more of the control structures corresponding to each of the generated subtrees.

18. The program generation apparatus according to claim 17,

wherein the complete tree generating unit (i) determines a height of the complete tree that is a maximum node depth in said complete tree, said height being a value which is obtained by adding one to a maximum value of a nesting depth within the range indicated by the second parameter, (ii) determines a number of child nodes of each node in the complete tree, said number of child nodes being a maximum number of parallel control structures within the range indicated by the second parameter, and (iii) generates tree structure data, as the complete tree, in accordance with the determined height and number of child nodes,

wherein in a case where the first parameter indicates an if-then-else branch structure, in the generation of the complete tree in (iii), the complete tree generating unit generates all of the nodes except for a root node as twin nodes, and then generates the complete tree so that each node in each of the twin nodes branches to twin nodes of the determined number of child nodes.

19. The program generation apparatus according to claim 15,

wherein the first script includes an indication that a data dependency should be set, and an indication of a number concerning the data dependency to be set, and

the script generating unit further includes a marking unit operable to put the indicated number of dependency marks in each of the second scripts generated by the control structure generating unit, in accordance with the indication that the data dependency should be set, said dependency marks indicating points at which the data dependency should be set.

20. The program generation apparatus according to claim 19,

wherein the marking unit puts a pair of dependency marks in two neighboring basic blocks respectively.

21. The program generation apparatus according to claim 19,

wherein the control structures include an if-then-else branch structure, and

the marking unit puts the pair of dependency marks in a basic block that corresponds to “

then” and

a basic block that corresponds to “

else”

, respectively.

22. The program generation unit according to claim 15,

wherein the first script includes an indication that an output statement should be set, and an indication of a number concerning the output statement to be set, and

the script generating unit further includes a marking unit operable to put output marks, on a random basis, in the indicated number of basic blocks in each of the second scripts generated by the control structure generating unit, in accordance with the indication that the output statement should be set, said output marks indicating points at which the output statement should be set.

23. The program generation apparatus according to claim 15,

wherein the first script includes an indication that an output statement should be set, and an indication of a number concerning the output statement to be set, and

the script generation unit further includes a marking unit operable to put output marks in every indicated number of basic blocks in each of the second scripts generated by the control structure generating unit, in accordance with the indication that the output statement should be set, said output marks indicating points at which the output statement should be set.

24. The program generation apparatus according to claim 1, further comprising a program generating unit operable to generate a program that corresponds to each of the plurality of second scripts generated by the script generation unit.

25. A program generation method comprising:

an accepting step of accepting a first script that defines a plurality of program structures for programs to be generated; and

a script generating step of generating a plurality of second scripts, each of which describes one of the plurality of program structures defined by the first script, said one of the plurality of program structures being different from each other.

26. A program for program generation that causes a computer to execute:

an accepting step of accepting a first script that defines a plurality of program structures for programs to be generated; and

a script generating step of generating a plurality of second scripts, each of which describes one of the plurality of program structures defined by the first script, said one of the plurality of program structures being different from each other.

27. A script having a data structure which is processed by a program generation apparatus for generating a plurality of programs, the script comprising a high level script and a plurality of middle level scripts,

wherein the high level script is converted into the plurality of middle level scripts,

the plurality of middle level scripts are converted into the plurality of programs to be generated,

the high level script includes the following:

a first parameter indicating a type of control structures to be set in the programs to be generated;

a second parameter indicating a plurality of arrangements of the control structures; and

a third parameter specifying a numerical range of the second parameter, and defines a plurality of program structures by indicating the plurality of arrangements of the control structures in the programs to be generated, and

each of the middle level scripts is written as a set of a plurality of fourth parameters indicating the control structures, and indicates one of the plurality of arrangements of the control structures.

28. The script according to claim 27,

wherein the high level script has a plurality of sets of the second parameter and the third parameter, which correspond to said one first parameter.

29. The script according to claim 27,

wherein the second parameter further specifies one of a program statement that indicates a data dependency and a program statement that indicates an output.