JPS6450141A - Information processor - Google Patents

Abstract

PURPOSE:To surely and simply execute the load/store instruction test of a buffer storage means, by allowing the titled processor to have store operation control information by which a store operation can be executed only to one of the buffer storage means or a main storage means. CONSTITUTION:From a data processing means 1, a store instruction to a buffer storage means 3 and a main storage means 2 is executed. Subsequently, from the means 1, a loading request of a data A is executed, and since a data does not exist, the means 3 reads out the data A from the means 2 and registers it to the means 3. From the means 1, a store instruction for rewriting the data A to B is issued. As for the means 3, store inhibiting information is given, therefore, only in the means 2, the data A is rewritten to B. Subsequently, from the means 1, the loading instruction is issued again. In this case, in the means 3, the data A is to exist, whether the data which has been read out is A or not is decided by the means 1, and a load instruction test of the means 3 for deciding to be normal, and an incorrect operation, in case of the data A, and others, respectively can be executed.