METHOD AND APPARATUS FOR EXECUTION, BY COMPUTER, OF PROCEDURE OF DIFFERENT WORD SIZE

摘要

PURPOSE: To provide a method and device for allowing a 64-bit device to operate a 32-bit software. CONSTITUTION: This method and device is constituted of the process of placing display indicating the word size of a procedure in at least one of the number of the registers of a processor, the process of supplying a save area including at least one part of the save area of the procedure of the smallest word size in the same address for a memory for the register filing of each word size, the process of indicating the word size of the procedure at the part of the save area with the same address and place display held by at least one of the register of the processor, and the process of re-investigating display at the part of the save area with the same address each time of generating saving operation for deciding the word size of a procedure to be restored.