摘要:
Disclosed is a compiler apparatus for generating an instruction code composed of instruction sets each including an instruction that designates an m-bit immediate value indicating a location of a data item in a memory area. The compiler apparatus sequentially selects, based on one data attribute, a data item from a group X composed of a plurality of data items; and judges, each time a data item is selected, whether the selected data item is allocatable to an n-byte memory area (n≦2m). When the judgment is negative, the compiler apparatus specifies, based on a different data attribute, a data item out of all the selected data items and excludes the specified data item from the group X, and repeats the selection until all the data items remaining in the group X after excluding specified data items are judged to be allocatable to the memory area.
摘要:
A compiler comprises an analysis unit that detects directives (options and pragmas) from a user to the compiler, an optimization unit that is made up of a processing unit (a global region allocation unit, a software pipelining unit, a loop unrolling unit, a “if” conversion unit, and a pair instruction generation unit) that performs individual optimization processing designated by options and pragmas from a user, following the directives and the like from the analysis unit, etc. The global region allocation unit performs optimization processing, following designation of the maximum data size of variables to be allocated to a global region, designation of variables to be allocated to the global region, and options and pragmas regarding designation of variables not to be allocated in the global region.
摘要:
An operator definition file 102 and the like included in a source program 101 and a compiler 100 that translates the source program 101 into a machine language program 105 are provided. The operator definition file 102 includes definitions of various fixed point type operators by class definitions. The compiler 100 can generate effectively advanced and specific instructions that a processor executes and make improvements through expanding functions and the like without repeating frequently upgrading of the version of the compiler itself. The compiler 100 is made up of an intermediate code generation unit 121 that generates intermediate codes, a machine language instruction substitution unit 122 that substitutes the intermediate codes referring to classes defined by the operator definition file 102 with machine language instructions and an optimization unit 130 that performs optimization targeting the intermediate codes including the substituted machine language instructions.
摘要:
An operator definition file 102 and the like included in a source program 101 and a compiler 100 that translates the source program 101 into a machine language program 105 are provided. The operator definition file 102 includes definitions of various fixed point type operators by class definitions. The compiler 100 can generate effectively advanced and specific instructions that a processor executes and make improvements through expanding functions and the like without repeating frequently upgrading of the version of the compiler itself. The compiler 100 is made up of an intermediate code generation unit 121 that generates intermediate codes, a machine language instruction substitution unit 122 that substitutes the intermediate codes referring to classes defined by the operator definition file 102 with machine language instructions and an optimization unit 130 that performs optimization targeting the intermediate codes including the substituted machine language instructions.
摘要:
A program processing apparatus, which can correct a source program by automatically inserting hint information so that a satisfactory optimization can be performed even in the case where the user has not given hint information to a compiler, automatically inserts, into the source program, hint information given to the compiler, and includes: a syntax analysis unit which analyzes a syntax of the source program and generates analysis information; and a hint information insertion unit which creates a program by inserting hint information that is logically consistent and that is given to the compiler into the source program based on the analysis information, and outputs the created program.
摘要:
A compiler comprises an analysis unit that detects directives (options and pragmas) from a user to the compiler, an optimization unit that is made up of a processing unit (a global region allocation unit, a software pipelining unit, a loop unrolling unit, a “if” conversion unit, and a pair instruction generation unit) that performs individual optimization processing designated by options and pragmas from a user, following the directives and the like from the analysis unit, etc. The global region allocation unit performs optimization processing, following designation of the maximum data size of variables to be allocated to a global region, designation of variables to be allocated to the global region, and options and pragmas regarding designation of variables not to be allocated in the global region.
摘要:
A compiling unit (110) generates indefinite branch information showing that an instruction set to be selected is indefinite, instead of generating a branch instruction. A linking unit (130) generates an appropriate direct addressing branch instruction by judging whether an instruction set used at a branch source and an instruction set used at a branch destination are the same. Also, one reference instruction set is determined. The compiling unit (110) adds a mode adjusting instruction that belongs to the reference instruction set and that is for causing a branch to an instruction placed at a branch destination and for selecting the instruction set that is originally to be selected. The mode adjusting instruction provides an alternative branch destination corresponding to an original branch destination, and the compiling unit (110) generates an indirect addressing branch instruction for causing a branch to the alternative branch destination and for selecting the reference instruction set.
摘要:
A compiler apparatus that improves the performance of loop processing. The compiler apparatus translates a C program that includes a loop into a machine language program, and includes: a movement judgment unit that judges whether or not an instruction which is positioned outside of the loop of the C program can be moved into the loop, based on a state of live ranges of variables used in the instruction; a movement execution unit that moves the instruction into the loop in the case where the movement judgment unit judges that the instruction can be moved into the loop, thereby generating an intermediate program; and a translation unit that translates the intermediate program into the machine language program.
摘要:
The first, second, and third operating units 441 to 443 each perform a predetermined operation according to an instruction before a point of time partway through a clock cycle. When having performed a comparison operation, each operating unit outputs a result value to the condition flag operating unit 51. The condition flag operating unit 51 calculates a new condition flag value by performing a logical operation on either (a) a value that has been read from the condition flag register 46 and the result value or (b) the result values themselves. The condition flag operating unit 51 outputs, before the clock cycle ends, the new condition flag value to one of the first, second, and third gates 451 to 453 that is related to a conditional instruction so as to control nullification of the conditional new condition flag value.
摘要:
An operator definition file 102 and the like included in a source program 101 and a compiler 100 that translates the source program 101 into a machine language program 105 are provided. The operator definition file 102 includes definitions of various fixed point type operators by class definitions. The compiler 100 can generate effectively advanced and specific instructions that a processor executes and make improvements through expanding functions and the like without repeating frequently upgrading of the version of the compiler itself. The compiler 100 is made up of an intermediate code generation unit 121 that generates intermediate codes, a machine language instruction substitution unit 122 that substitutes the intermediate codes referring to classes defined by the operator definition file 102 with machine language instructions and an optimization unit 130 that performs optimization targeting the intermediate codes including the substituted machine language instructions.