Joseph Gebis

EECS Department, University of California, Berkeley

Technical Report No. UCB/CSD-03-1288

2003

VIRAM1 (Vector Intelligent RAM 1) is a low-power multimedia processor with embedded DRAM designed at UC Berkeley in 2002 and fabricated in 2003. It includes a scalar core and four vector computation units, called lanes. The goals of the chip, low-power media processing, require that the vector lanes have efficient integer multipliers that can work with a variety of data sizes. In this report, I describe an efficient partitionable integer multiplier that is designed to work in VIRAM1's vector computation lanes. The multiplier is capable of operating with a latency of two cycles at 200 MHz in a 1.2 V, .18 micron process at 64, 32, or 16 bit data width sizes, while consuming less than 250 mW of power. I describe and evaluate design options for different parts of the multiplier, and analyze the results of the chosen options.

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BibTeX citation:

@techreport{Gebis:CSD-03-1288,
    Author= {Gebis, Joseph},
    Title= {A 64-bit Partitionable Integer Multiplier for VIRAM1},
    Year= {2003},
    Month= {Nov},
    Url= {http://www2.eecs.berkeley.edu/Pubs/TechRpts/2003/5698.html},
    Number= {UCB/CSD-03-1288},
    Abstract= {VIRAM1 (Vector Intelligent RAM 1) is a low-power multimedia processor with embedded DRAM designed at UC Berkeley in 2002 and fabricated in 2003. It includes a scalar core and four vector computation units, called lanes. The goals of the chip, low-power media processing, require that the vector lanes have efficient integer multipliers that can work with a variety of data sizes. In this report, I describe an efficient partitionable integer multiplier that is designed to work in VIRAM1's vector computation lanes. The multiplier is capable of operating with a latency of two cycles at 200 MHz in a 1.2 V, .18 micron process at 64, 32, or 16 bit data width sizes, while consuming less than 250 mW of power. I describe and evaluate design options for different parts of the multiplier, and analyze the results of the chosen options.},
}

EndNote citation:

%0 Report
%A Gebis, Joseph 
%T A 64-bit Partitionable Integer Multiplier for VIRAM1
%I EECS Department, University of California, Berkeley
%D 2003
%@ UCB/CSD-03-1288
%U http://www2.eecs.berkeley.edu/Pubs/TechRpts/2003/5698.html
%F Gebis:CSD-03-1288