Processing apparatus

A processing apparatus comprising:

• a plurality of operation units having a same operating function, each of which performs a given operation for an input operand in accordance with an operating instruction and outputs an exception flag when a result of the operation is false;
• a storage unit which stores the operand;
• a first network which connects the storage unit and the operation units and supplies the operand to the operation units;
• a second network which connects the operation units and the storage unit to write the result of the operation of each of the operation units back to the storage unit;
• a defect sensor which receives the exception flag from each of the operation units to sense an operation unit from which the exception flag is generated with high frequency;
• and
• a logic unit controller which controls the first network and the second network to disconnect the operation unit sensed by the defect sensor from a system, and causes another operation unit to perform an operation assigned to the disconnected operation unit again,
• wherein the operation units are logic units each of which performs a desired logical operation for one or more input operands, the logic units including:
• a first logic operation unit which performs a first logical operation to determine an operation result thereof uniquely by one or more input operands;
• a second logic operation unit which performs a second logical operation to determine an operation result thereof uniquely by one or more input operands;
• a third logic operation unit which receives the operation result of the first logic operation unit and performs a third logical operation to determine an operation result thereof uniquely;
• and
• a fourth logic operation unit which compares the operation result of the second logic operation unit and the operation result of the third logic operation unit to determine whether the operation result of the first logic operation unit is correct or not, and which outputs the exception flag when the operation result is not correct.