A Behavioral Synthesis Method with Special Functional Units

Tsuyoshi SADAKATA; Yusuke MATSUNAGA

doi:10.1093/ietfec/e91-a.4.1084

A Behavioral Synthesis Method with Special Functional Units

Tsuyoshi SADAKATA, Yusuke MATSUNAGA

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This paper proposes a novel Behavioral Synthesis method that tries to reduce the number of clock cycles under clock cycle time and total functional unit area constraints using special functional units efficiently. Special functional units are designed to have shorter delay and/or smaller area than the cascaded basic functional units for specific operation patterns. For example, a Multiply-Accumulator is one of them. However, special functional units may have less flexibility for resource sharing because intermediate operation results may not be able to be obtained. Hence, almost all conventional methods can not handle special functional units efficiently for the reduction of clock cycles in practical time, especially under a tight area constraint. The proposed method makes it possible to solve module selection, scheduling, and functional unit allocation problems using special functional units in practical time with some heuristics. Experimental results show that the proposed method has achieved maximally 33% reduction of the cycles for a small application and 14% reduction for a realistic application in practical time.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E91-A No.4 pp.1084-1091

Publication Date: 2008/04/01

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Online ISSN: 1745-1337

DOI: 10.1093/ietfec/e91-a.4.1084

Type of Manuscript: Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)

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Tsuyoshi SADAKATA, Yusuke MATSUNAGA, "A Behavioral Synthesis Method with Special Functional Units" in IEICE TRANSACTIONS on Fundamentals, vol. E91-A, no. 4, pp. 1084-1091, April 2008, doi: 10.1093/ietfec/e91-a.4.1084.
Abstract: This paper proposes a novel Behavioral Synthesis method that tries to reduce the number of clock cycles under clock cycle time and total functional unit area constraints using special functional units efficiently. Special functional units are designed to have shorter delay and/or smaller area than the cascaded basic functional units for specific operation patterns. For example, a Multiply-Accumulator is one of them. However, special functional units may have less flexibility for resource sharing because intermediate operation results may not be able to be obtained. Hence, almost all conventional methods can not handle special functional units efficiently for the reduction of clock cycles in practical time, especially under a tight area constraint. The proposed method makes it possible to solve module selection, scheduling, and functional unit allocation problems using special functional units in practical time with some heuristics. Experimental results show that the proposed method has achieved maximally 33% reduction of the cycles for a small application and 14% reduction for a realistic application in practical time.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e91-a.4.1084/_p

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@ARTICLE{e91-a_4_1084,
author={Tsuyoshi SADAKATA, Yusuke MATSUNAGA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Behavioral Synthesis Method with Special Functional Units},
year={2008},
volume={E91-A},
number={4},
pages={1084-1091},
abstract={This paper proposes a novel Behavioral Synthesis method that tries to reduce the number of clock cycles under clock cycle time and total functional unit area constraints using special functional units efficiently. Special functional units are designed to have shorter delay and/or smaller area than the cascaded basic functional units for specific operation patterns. For example, a Multiply-Accumulator is one of them. However, special functional units may have less flexibility for resource sharing because intermediate operation results may not be able to be obtained. Hence, almost all conventional methods can not handle special functional units efficiently for the reduction of clock cycles in practical time, especially under a tight area constraint. The proposed method makes it possible to solve module selection, scheduling, and functional unit allocation problems using special functional units in practical time with some heuristics. Experimental results show that the proposed method has achieved maximally 33% reduction of the cycles for a small application and 14% reduction for a realistic application in practical time.},
keywords={},
doi={10.1093/ietfec/e91-a.4.1084},
ISSN={1745-1337},
month={April},}

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TY - JOUR
TI - A Behavioral Synthesis Method with Special Functional Units
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1084
EP - 1091
AU - Tsuyoshi SADAKATA
AU - Yusuke MATSUNAGA
PY - 2008
DO - 10.1093/ietfec/e91-a.4.1084
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E91-A
IS - 4
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - April 2008
AB - This paper proposes a novel Behavioral Synthesis method that tries to reduce the number of clock cycles under clock cycle time and total functional unit area constraints using special functional units efficiently. Special functional units are designed to have shorter delay and/or smaller area than the cascaded basic functional units for specific operation patterns. For example, a Multiply-Accumulator is one of them. However, special functional units may have less flexibility for resource sharing because intermediate operation results may not be able to be obtained. Hence, almost all conventional methods can not handle special functional units efficiently for the reduction of clock cycles in practical time, especially under a tight area constraint. The proposed method makes it possible to solve module selection, scheduling, and functional unit allocation problems using special functional units in practical time with some heuristics. Experimental results show that the proposed method has achieved maximally 33% reduction of the cycles for a small application and 14% reduction for a realistic application in practical time.
ER -