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MICRO
2003
IEEE

Exploiting Value Locality in Physical Register Files

13 years 8 months ago
Exploiting Value Locality in Physical Register Files
The physical register file is an important component of a dynamically-scheduled processor. Increasing the amount of parallelism places increasing demands on the physical register file, calling for alternative file organization and management strategies. This paper considers the use of value locality to optimize the operation of physical register files. We present empirical data showing that: (i) the value produced by an instruction is often the same as a value produced by another recently executed instruction, resulting in multiple physical registers containing the same value, and (ii) the values 0 and 1 account for a considerable fraction of the values written to and read from physical registers. The paper then presents three schemes to exploit the above observations. The first scheme extends a previously-proposed scheme to use only a single physical register for each unique value. The second
Saisanthosh Balakrishnan, Gurindar S. Sohi
Added 05 Jul 2010
Updated 05 Jul 2010
Type Conference
Year 2003
Where MICRO
Authors Saisanthosh Balakrishnan, Gurindar S. Sohi
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