3 results about "Loop counter" patented technology

A chip supporting constant time program control of nested loops. The chip includes at least one arithmetic logic computing unit and a controller operatively coupled thereto. The controller is configured according to a program configuration including at least one inner loop and an outer loop. The controller is configured to cause the at least one arithmetic computing unit to perform a plurality of operations according to the program configuration. The controller is configured to maintain at least a first loop counter configured to count a number of performed iterations of the at least one outer loop and a second loop counter configured to count a number of performed iterations of the at least one inner loop. The controller is configured to provide a first indication of whether the first loop counter corresponds to a last iteration and a second indication of whether the second loop counter corresponds to a last iteration. The controller is configured to increment, reset, or maintain each of the first loop counter and the second loop counter alternately according to the first indication and the second indication.

The invention relates to a loop instruction execution method, an integrated circuit, a computer readable storage medium and a computer program product. The method comprises the steps that a target instruction set is obtained, the target instruction set comprises multiple parts of implicit branch instructions, and the multiple parts of implicit branch instructions are used for replacing explicit backward branch instructions to control starting, iteration and termination of a target loop; executing a multi-part implicit branch instruction, and starting a target loop and iteration based on an initial condition; adjusting the initial loop count value of the loop counter according to the loop type corresponding to the target loop, and updating the loop count value in real time in the iteration process of the target loop; under the condition that the reserved bit is triggered, comparing the current updated cycle count value with a termination condition; and terminating the target cycle under the condition that the current updated cycle count value meets a termination condition. By adopting the method, the problem of pipeline stagnation caused by backward branch instructions can be eliminated on the premise of not increasing the code volume, and the overall instruction execution efficiency is improved.

The present application relates to a kind of extracting code loop counter method, device, storage medium and electronic equipment, belong to safety detection technical field.The method of the present application, steps are as follows: analyzing code is analyzed;Generation control flow graph and obtain loop code structure;Obtain the constant data set in loop code structure;Based on constant data set, obtain scalar constant data set;Obtain potential monotonic scalar constant data set;Obtain monotonic scalar constant data set;Obtain loop definition exit;Obtain loop jump statement exit;Based on loop exit set and monotonic scalar constant data set, obtain loop counter.Through the above steps, the extraction of loop counter can be completed.The present application can accurately and completely obtain loop counter set, provide support for carrying out loop code structure itself related defect check, also make complete path traversal with the code with loop structure possible, improve the efficiency and accuracy of detection.