This is the artifact of the paper entitled "Cycle-oriented Dynamic Approximation: Architectural Framework to Meet Performance Requirements" in Computer Architecture Letters. The artifact contains the assembler compatible with dedicated instructions to approximation, the source code of each workload, the source code of the simulator "Onikiri 2'' with simulation configuration files, scripts to run Onikiri 2, and MATLAB scripts for generating the charts in Fig. 5 and Fig. 6. Fig.