Program execution control system

摘要

A program execution control system is provided for a processing unit of a computer. An exclusive register has a plurality of 1-bit flag in which true and false data can be individually set and which can individually specify a flag for determining whether execution of each instruction in the program is canceled or not for each instruction. This provides for an integer, logic operation and comparison and a memory for storing an instruction word which contains a flag specifying filed in the exclusive register for determining whether execution of the instruction is canceled or not based on a value stored in the exclusive register, a condition is also provided specifying sub-operation code filed for an operand by use of a numeric value and a flat bit for storing a resulting value of true or false for given condition when the instruction sets the flat for setting the resultant value of truth or falsehood of the condition specified to the instruction of the condition specifying sub-operation code filed in the exclusive flat register specified to the instruction of the flag bit specifying operand field and for canceling the instruction according to at least one of a value of the exclusive register means specified to the instruction of the flat bit specifying filed indicating to cancel the instruction whether the value is "1" or "0".