Abstract: In programming in high-level language, a method of generating a program supporting external specifications for generating secure codes having high tamper-resistance and automatically generating an executable program having tamper-resistance with regard to a portion designated by a user is provided. A syntax analysis step, an intermediate representation generation step, a register allocation step, an optimization processing step, an assembly language generation step, a machine language generation step and a machine language program linkage step are executed. And between finish of reading of the source program and generating the executable program, a tamper-resistant code insertion step of automatically generating a code having tamper-resistance coping with unjust analysis of an operation content of the executable program is executed to the source program, the intermediate representation, the assembly language program or the machine language program based on an instruction of a user.

Abstract: Different optimizing methods are applied in response to such a memory hierarchy to which a program mainly accesses when the program is executed. A memory hierarchy to which a program mainly accesses is designated by a user with employment of either a compiler option designation or a designation statement contained in the program. In a compiler, a memory hierarchy designation is analyzed, and an optimizing process according to the designated memory hierarchy is carried out.

Abstract: Different optimizing methods are applied in response to such a memory hierarchy to which a program mainly accesses when the program is executed. A memory hierarchy to which a program mainly accesses is designated by a user with employment of either a compiler option designation or a designation statement contained in the program. In a compiler, a memory hierarchy designation is analyzed, and an optimizing process according to the designated memory hierarchy is carried out.

Abstract: A translator system for translating source programs into machine language programs in an electronic computer system. An object program common to a plurality of different machine types of computers are generated while implementing execution performance equivalent to object programs inherent to the computers. A compiler translates a source program into an abstract object program including an abstract machine instruction sequence and indication concerning allocation of abstract registers. An installer converts the abstract object program into a machine language program of target computer on the basis of executable computer specification information including register usage indication and machine instruction selecting rules.

Abstract: A translator system for translating source programs into machine language programs in an electronic computer system. An object program common to a plurality of different machine types of computers are generated while implementing execution performance equivalent to object programs inherent to the computers. A compiler translates a source program into an abstract object program including an abstract machine instruction sequence and indication concerning allocation of abstract registers. An installer converts the abstract object program into a machine language program of target computer on the basis of executable computer specification information including register usage indication and machine instruction selecting rules.

Abstract: A translator system for translating source programs into machine language programs in an electronic computer system. An object program common to a plurality of different machine types of computers are generated while implementing execution performance equivalent to object programs inherent to the computers. A compiler translates a source program into an abstract object program including an abstract machine instruction sequence and indication concerning allocation of abstract registers. An installer converts the abstract object program into a machine language program of target computer on the basis of executable computer specification information including register usage indication and machine instruction selecting rules.

Abstract: Based on a repetitively executed program fragment like a loop in a source program, at least two patterns of object codes are generated which include object codes (a) using a speculative instruction and a speculative check instruction and an object codes (b) not using the speculative instruction and the speculative check instruction. Other object codes are generated that perform control transfer so that after the number of times a speculation failure is detected by the speculation check during the execution of the codes (a) satisfies a predetermined condition, the codes (b) are used for the subsequent repetitive execution.

Abstract: Particular portions of a program is determined to execute repeatedly. Array references accessed in a loop are classified to groups of equal values on the basis of reference to the same array. Of the groups, the ones for which an array transposition can use a batch load or store instruction are selected. An array corresponding to the selected groups is transposed to generate an intermediate language for copying. Reference to the elements of the array before the transposition is changed to reference to the transposition array. This makes it possible to convert the loop so that a single instruction can be used for a processor which can load into a register two data having consecutive addresses in a memory with use of the instruction.

Abstract: A translator system for translating source programs into machine language programs in an electronic computer system. An object program common to a plurality of different machine types of computers are generated while implementing execution performance equivalent to object programs inherent to the computers. A compiler translates a source program into an abstract object program including an abstract machine instruction sequence and indication concerning allocation of abstract registers. An installer converts the abstract object program into a machine language program of target computer on the basis of executable computer specification information including register usage indication and machine instruction selecting rules.

Abstract: A control system for a cache provided between a central processing unit and a main memory. The control system includes a plurality of entries each having a data area and a control information area. A reuse information field in the control information area is set at the same time as a load/store instruction from the central processing unit. When the central processing unit issues an access instruction to desired data in the main memory, an entry storing the desired data to be accessed is searched from a plurality of entries of the cache. If the desired data is not present in any of the plurality of entries, the desired data is read from the main memory. Then, an empty entry is searched from the plurality of entries. If there is no empty entry, an entry is selected which is not set with the reuse information in the control information area of the entry, the reuse information instructing to preferentially maintaining the data in the data field of the entry.

Abstract: A system for analyzing syntax in a language processing system includes a memory which stores preselected indentation rules associated with a source code level language. A lexical analyzer reads a sequence of input symbols from the source code, and divides them into tokens, which tokens form sequences of symbols having a collective meaning. A syntax analyzer receives information from the tokens and compares the same to indentation rules stored in the memory. Source code correction, suggested source code correction, or warnings indicative of improper identation are selectively generated in accordance with an output of the syntax analyzer.