Patent Number: 6,763,449

Title: Operation-processing apparatus

Abstract: An operation-processing apparatus is equipped with an instruction decoder for decoding an existing instruction and an extension instruction into the same operation code including at least instruction-type-determining bits for determining the existing instruction or the extension instruction, an existing-operation-executing unit for executing an existing operation according to the operation code and outputting an operation-termination-notifying signal, an extension-operation-executing unit that operates in synchronism with the existing-operation-executing unit to thereby execute an extension operation according to the operation code, a control circuit for determining the type of the instruction according to the instruction-type-determining bits, and a multiplexer that, when the type of the instruction has been determined to be the extension instruction and when an operation-termination-notifying signal has been input, selects an extension instruction operated-result data.

Inventors: Sugano; Fumitake (Kawasaki, JP), Takeshita; Katsunori (Kawasaki, JP)

Assignee: Fujitsu Limited

International Classification: G06F 9/44 (20060101); G06F 9/318 (20060101); G06F 9/30 (20060101); G06F 009/318 (); G06F 009/44 ()

Expiration Date: 07/12012