標題: Improving datapath utilization of programmable DSP with composite functional units
作者: Ou, Shih-Hao
Cho, Yi
Lin, Tay-Jyi
Liu, Chih-Wei
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 2008
摘要: A scalar (single-issue) processor executes one instruction at a time and its functional units (ALU, multiplier, and shifter, etc) are never concurrently exercised. Modem processors issue multiple instructions simultaneously (i.e. superscalar or VLIW) to improve their functional unit utilization but the cost is considerably high. In this paper, an alternative is described to activate multiple functional units concurrently by issuing a composite instruction on cascaded functional units. Besides, an automatic generator for application-specific composite functional units is presented. In our simulation with popular DSP applications, 35% increase on the operations per cycle ran be simply obtained with identical functional units. Moreover, our proposed approach saves up to 16.5% and 31.6% power on scalar and VLIW respectively for comparable performance.
URI: http://hdl.handle.net/11536/31198
ISBN: 978-1-4244-2078-0
ISSN: 0271-4302
期刊: PROCEEDINGS OF 2008 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-10
起始頁: 3438
結束頁: 3441
Appears in Collections:Conferences Paper