Proposed High Speed 64-bit VLIW Microprocessor with Modified Adders

摘要

This paper presents the concept, traits, principle and structure of 64-bit high speed VLIW microprocessor. The microprocessor facilitates 16 kinds of operational function. Out of these, our main focus is on the add operation. The add operation is implemented using 64-bit adders namely, Carry Look-ahead Adder, Carry Select Adder, Ripple Carry Adder, Weinberger Adder, Ling Adder and Modified CSLA using Ling Adders. These different processor architectures are then compared for Delay. It is observed that the architecture with Modified CSLA using Ling Adder incorporated is the fastest. The design is implemented Xilinx Virtex-7 FPGA, xc7vx690tffg1761-2 device and is simulated, synthesized and implemented with the help of Xilinx Vivado 2015.4 using Verilog HDL.