| 摘要 |
PURPOSE:To very simply obtain information necessary in itself, as error information at the time when an arithmetic error interruption is generated, in the case a different kind computer instruction is pseudo-executed. CONSTITUTION:When a different kind computer instruction A is pseudo-executed, arithmetic completion in the course of execution is waited for by an arithmetic completion waiting/interruption inhibiting mechanism 5, and also, it is set to an interruption inhibiting state, and thereafter, information of an operand shown by the instruction A is copied to a specific register by copying mechanisms 6, 7, and by actuating a pseudo-execution subroutine processing mechanism 4 by a calling mechanism 8, a pseudo-execution of the instruction A is executed. Its result is written in a real destination operand designated directly/indirectly by the corresponding specific register through a temporary destination operand, and thereafter, it is returned from the pseudo- execution subroutine by discriminating whether generation of an arithmetic error interruption is necessary or unnecessary, and when it is discriminated that generation of the interruption is necessary, an exclusive SVC is issued by an exclusive SVC (supervisor call) issuing mechanism 9, and an arithmetic error interruption based on an architecture of a different kind computer is pseudo-generated. |
