PROCESSOR, AND DEVICE AND METHOD FOR COMPILATION

摘要

PROBLEM TO BE SOLVED: To overcome the problem that a conditional execution instruction is executed as a non-action instruction if conditions are not met, and the use efficiency of hardware deteriorate to lower effective performance. SOLUTION: A processor decides execution conditions by decoding instructions more than mounted computing elements by an instruction issue control part 31 before an execution stage, invalidates instructions themselves whose conditions are false, and performs allocation so that the computing elements (hardware) can effectively be used for following effective instructions. A compiling device performs scheduling so that the number of instructions whose execution conditions are true does not exceed the upper limit of parallelism of the hardware. The number itself of instructions which are arranged in parallel in each cycle may exceed the parallelism of the hardware.