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- W2097988171 abstract "A large logical register file is important to allow effective compiler transformations or to provide a windowed space of registers to allow fast function calls. Unfortunately, a large logical register file can be slow, particularly in the context of a wide-issue processor which requires an even larger physical register file, and many read and write ports. Previous work has suggested that a register cache can be used to address this problem. This paper proposes a new register caching mechanism in which a number of good features from previous approaches are combined with existing out-of-order processor hardware to implement a register cache for a large logical register file. It does so by separating the logical register file from the physical register file and using a modified form of register renaming to make the cache easy to implement. The physical register file in this configuration contains fewer entries than the logical register file and is designed so that the physical register file acts as a cache for the logical register file, which is the backing store. The tag information in this caching technique is kept in the register alias table and the physical register file. It is found that the caching mechanism improves IPC up to 20% over an un-cached large logical register file and has performance near to that of a logical register file that is both large and fast." @default.
- W2097988171 created "2016-06-24" @default.
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- W2097988171 date "2001-06-17" @default.
- W2097988171 modified "2023-09-27" @default.
- W2097988171 title "Integrating superscalar processor components to implement register caching" @default.
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- W2097988171 doi "https://doi.org/10.1145/377792.377859" @default.
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