Dynamic Access Control of Instruction Buses by Using Active Bits Detection for Low Power Systems

• Item type: SIG Technical Reports(1)
• 公開日: 2003-05-15
• タイトル: Dynamic Access Control of Instruction Buses by Using Active Bits Detection for Low Power Systems
• タイトル / 言語: en
• タイトル: Dynamic Access Control of Instruction Buses by Using Active Bits Detection for Low Power Systems
• 言語: jpn
• 資源タイプ / 資源タイプ識別子: http://purl.org/coar/resource_type/c_18gh
• 資源タイプ: technical report
• 著者所属: Department of Computer Science and Communication Engineering Kyushu University
• 著者所属: Department of Computer Science and Communication Engineering Kyushu University
• 著者所属: Department of Computer Science and Communication Engineering Kyushu University
• 著者所属: Department of Computer Science and Communication Engineering Kyushu University
• 著者所属: Department of Computer Science and Communication Engineering Kyushu University
• 著者所属(英): en
• 著者所属(英): Department of Computer Science and Communication Engineering, Kyushu University
• 著者所属(英): en
• 著者所属(英): Department of Computer Science and Communication Engineering, Kyushu University
• 著者所属(英): en
• 著者所属(英): Department of Computer Science and Communication Engineering, Kyushu University
• 著者所属(英): en
• 著者所属(英): Department of Computer Science and Communication Engineering, Kyushu University
• 著者所属(英): en
• 著者所属(英): Department of Computer Science and Communication Engineering, Kyushu University
• 著者名: Masanori, Muroyama; Akihiko, Hyodo; Takanori, Okuma; Koji, Makiyama; Hiroto, Yasuura
• 著者名(英): Masanori, Muroyama; Akihiko, Hyodo; Takanori, Okuma; Koji, Makiyama; Hiroto, Yasuura
• 論文抄録 / 内容記述タイプ: Other
• 論文抄録 / 内容記述: External buses consume substantial power for their high capacitances of bus lines and I/O pin. In this paper we reduce redundant dynamic power consumption on instruction buses. For expressing a small number we need the small number of bits (the minimum bits are defined as active bits). But all bit lines on an instruction bus change their status and redundant power is consumed. Suppressing switching activity of inactive bits we can reduce redundant power cosumption. Since the active bits are different each data we reduce power by dynamic analysis and control of the instruction buses. An instruction is constructed of several fields which indicate kinds of operatins register numbers and an immediate value. After analyzing the characteristics of active bits in each field by profiling we change opcode and register assignments by using variable length coding to reduce active bits. We achieve more effcient power reduction by using active bits the code assignment of instruction set. Experimental results illustrate up to 29.1% switching activity reduction for MPEG2.
• 論文抄録(英) / 内容記述タイプ: Other
• 論文抄録(英) / 内容記述: External buses consume substantial power for their high capacitances of bus lines and I/O pin. In this paper, we reduce redundant dynamic power consumption on instruction buses. For expressing a small number, we need the small number of bits (the minimum bits are defined as active bits). But all bit lines on an instruction bus change their status and redundant power is consumed. Suppressing switching activity of inactive bits, we can reduce redundant power cosumption. Since the active bits are different each data, we reduce power by dynamic analysis and control of the instruction buses. An instruction is constructed of several fields which indicate kinds of operatins, register numbers and an immediate value. After analyzing the characteristics of active bits in each field by profiling we change opcode and register assignments by using variable length coding to reduce active bits. We achieve more effcient power reduction by using active bits the code assignment of instruction set. Experimental results illustrate up to 29.1% switching activity reduction for MPEG2.
• 書誌レコードID / 収録物識別子タイプ: NCID
• 書誌レコードID / 収録物識別子: AA11451459
• 書誌情報: 情報処理学会研究報告システムLSI設計技術（SLDM）; 巻 2003, 号 46(2003-SLDM-110), p. 49-54, 発行日 2003-05-15
• Notice: SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc.
• 出版者 / 言語: ja
• 出版者: 情報処理学会