Patent ID: 7313674

Claim:
An instruction control device comprising: an instruction issuance control part for performing an issuance control for an OPCODE part of a decoded instruction, a source operand of which is brought to be useable, in a reservation station for storing a plurality of decoded instructions; and an operation pipeline controlling part receiving a preceding instruction issued by said instruction issuance control part and, by decoding said preceding instruction in every operation cycle, generating an update timing signal of source operand usability information for a succeeding instruction and a plurality of issuance inhibition signals for inhibiting issuance of a succeeding instruction corresponding to a type of said preceding instruction issued, and wherein each of said plurality of issuance inhibition signals inhibits issuance of said succeeding instruction over a particular operation cycle or cycles of said preceding instruction determined in advance according to a type of said succeeding instruction, and wherein said instruction issuance control part duly controls timing of an issuance of said succeeding instruction in accordance with said update timing signal and one of said issuance inhibition signals from said operation pipeline controlling part, said one of said inhibition signals being selected based on a type of said succeeding instruction.