On implementability of polymorphic register files
Paper in proceedings, 2012

This paper studies the implementability of performance efficient multi-lane Polymorphic Register Files (PRFs). Our PRF implementation uses a 2D array of p x q linearly addressable memory banks, with customized addressing functions to avoid address routing circuits. We target one single-view and a set of four non redundant multi-view parallel memory schemes that cover all widely used access patterns in scientific and multimedia applications: 1) p x q rectangle, p·q row, p·q main and secondary diagonals; 2) p x q rectangle, p·q column, p·q main and secondary diagonals; 3) p·q row, p·q column, aligned pxq rectangle; 4) pxq, q xp rectangles (transposition). Reconfigurable hardware was chosen for the implementation due to its potential in enhancing the PRF runtime adaptability. For a proof of concept, we prototyped a 2 read, 1 write ports PRF on a Virtex-7 XC7VX1140T-2 FPGA. We consider four sizes for the 16 lanes PRFs - 16x16, 32x32, 64x64 and 128x128 and three multi-lane configurations, 8, 16 and 32, for the 128 x 128 PRF. Synthesis results suggest clock frequencies between 111 MHz and 326 MHz while utilizing less than 10% of the available LUTs. By using customized addressing functions, the LUT usage is reduced by up to 29% and the clock frequency is up to 77% higher compared to a straight-forward implementation.

Author

Catalin Ciobanu

Chalmers, Computer Science and Engineering (Chalmers), Computer Engineering (Chalmers)

Delft University of Technology

G.K. Kuzmanov

Delft University of Technology

Georgi Gaydadjiev

Chalmers, Computer Science and Engineering (Chalmers), Computer Engineering (Chalmers)

ReCoSoC 2012 - 7th International Workshop on Reconfigurable and Communication-Centric Systems-on-Chip, Proceedings

6322873

Subject Categories

Computer Engineering

Computer Systems

Areas of Advance

Information and Communication Technology

DOI

10.1109/ReCoSoC.2012.6322873

ISBN

978-146732572-1

More information

Latest update

2/7/2019 1