The 32-bit D45 is an 8-stage superscalar processor that supports RISC-V specification, including “G” (“IMAFD”) standard instructions, “C” 16-bit compression instructions, “P” Packed-SIMD/DSP instructions, and “N” for user-level interrupts. It is capable of delivering high performance and operating at high frequency and high performance. D45 is also equipped with comprehensive SIMD/DSP instructions that can boost the performance of voice, audio, image and signal processing. Its “FD” extensions support IEEE754-compliance single and double precision floating point instructions as well. It incorporates MemBoost to greatly enhance memory bandwidth and reduce memory latencies for applications with intensive memory accesses. In addition, D45 features advanced low power branch prediction mechanism for efficient branch execution, instruction and data caches, local memories, and ECC error protection. It also includes vectored and preemptive interrupt controller to serve diversified system events, AXI 64-bit bus, rich power management, and JTAG debug and trace interface for software development support.