DocumentCode :
1947772
Title :
Custom instructions with local memory elements without expensive DMA transfers
Author :
Prakash, Alok ; Clarke, Christopher T. ; Srikanthan, Thambipillai
Author_Institution :
Sch. of Comput. Eng., NTU, Singapore, Singapore
fYear :
2012
fDate :
29-31 Aug. 2012
Firstpage :
647
Lastpage :
650
Abstract :
Traditionally, Instruction set extension (ISE) algorithms have treated memory and control flow as invalid operations during custom instruction identification to ensure deterministic latency of these extended instructions. In order to overcome these constraints some work has been done to incorporate local memory for custom instructions with memory operations. Such architectures have invariably relied on the expensive DMA protocol for data transfer. Cache-coherence management poses another challenge in such systems and requires additional hardware and/or software intervention. We propose a novel custom instruction architecture capable of incorporating certain types of memory and control-flow operations. Unlike existing architectures, the proposed design eliminates the need for expensive Direct Memory Access (DMA) transfers and additional cache management sub-systems, thereby saving significant time and energy. Our method is focused mainly on accelerating code segments with static variables as well as the ones allocated on the stack, which are widely prevalent in embedded applications. Experimental results show that the proposed method achieves a substantial performance gain of upto 47% over base processor implementation.
Keywords :
cache storage; instruction sets; protocols; DMA protocol; DMA transfer; ISE algorithm; base processor implementation; cache-coherence management; custom instruction identification; data transfer; direct memory access; flow control; instruction set extension algorithm; stack allocation; Field programmable gate arrays; Hardware; Memory management; Runtime; Software;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Field Programmable Logic and Applications (FPL), 2012 22nd International Conference on
Conference_Location :
Oslo
Print_ISBN :
978-1-4673-2257-7
Electronic_ISBN :
978-1-4673-2255-3
Type :
conf
DOI :
10.1109/FPL.2012.6339231
Filename :
6339231
Link To Document :
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