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題 名 | A Multimedia Functional Unit in General Purpose Microprocessor=通用型微處理器之多媒體功能單元設計 |
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作 者 | 柯嘉雄; | 書刊名 | 高苑學報 |
卷 期 | 7:1 1998.02[民87.02] |
頁 次 | 頁13-19 |
分類號 | 471.616 |
關鍵詞 | 多媒體功能單元; 通用型微處理器; Multimedia functional unit; General purpose microprocessor; MFU; |
語 文 | 英文(English) |
英文摘要 | The multimedia functional unit (MFU) is a functional unit of a general purpose microprocessor NSC-98. This functional unit executes all the MMX instructions and three new additional instructions. which support multimedia computations. Therefore, MFU is not only compatible with MMX but also extends multimedia support from MMX. The microarchitecture of MFU includes three main parts: reservation station (RS), MFU-0, and MFU-1. RS is a temporary storage that in-order accepts instructions from the dispatcher and operand preparation unit, and out-of-order issues instructions to the execution units MFU-0 and MFU-1. These two sub-units do not execute exactly the same set of instructions. Some instructions are executable in both of the sub-units, some are executable in MFU-0, while some are only executable in MFU-1. By using MPEG decoding as a benchmark, the performance analysis exhibits that MFU features higher execution speed than MMX by more than thirty percent. |
本系統中英文摘要資訊取自各篇刊載內容。