COMPUTER HAVING OPERATION INSTRUCTION FOR SPECIFIC USE AND CALCULATION METHOD OF COMPUTER

摘要

PROBLEM TO BE SOLVED: To minimize the increase in a circuit scale even when the number of specific use operation instructions is large with respect to a computer having specific use operation instructions. SOLUTION: The computer having the specific use operation instruction is provided with an operation exception detection flag 61 and a flag control part 55. When an operation exception is detected at the execution of a certain specific use operation instruction, a specific use operation instruction execution part 54 sets up the flag 61 to an effective state. When the flag 61 is set up to the effective state at the execution of a trap instruction for causing an interruption, the control part 55 informs an interruption control part 41 of the occurrence of an interruption due to the operation exception of the specific use operation instruction.