Design Of The Multimedia Shifter And System Level Verification Of MMX Unit In X Microprocessor

Multimedia unit based on MMX technology has been used in many new style microprocessors, and multimedia shifter is an important part of multimedia unit. So, it is crucial meaning for hign performance multimedia unit.This paper studies the design of high performance multimedia shifter, the proposed 64 bits high performance multimedia shifter is realized by full custom method, and multimedia unit including multimedia shifter is verified in system level. The main content and production of this paper are showed as follows:1. This paper studies the theory and design method of shifter, at the same time, MMX technology is studied. Consequently, a kind of high performance multimedia shifter's configuration is proposed. This shifter not only realizes MMX shift instructions, but also realizes MMX conversion instructions.2. By full custom design method, each module of multimedia shifter is designed, analyzed and simulated. At last, the full custom layout of multimedia shifter is finished and verified. In this shifter, the delay of critical path is 1.606ns, and layout area is 0.59292 mm~2. The design achieves the goal of higher speed and smaller area.3. The multimedia unit including multimedia shifter in X microprocessor is verified in system level. The result indicates that the multimedia unit including multimedia shifter can meet X microprocessor's need.X microprocessor has been taped out, and it can completely satisfy the request of design. Finally, the result proves that the multimedia unit and multimedia shifter are correct.