Energy-efficient mechanisms for managing thread context in throughput processors
Proceedings of the 38th annual international symposium on Computer architecture
A compile-time managed multi-level register file hierarchy
Proceedings of the 44th Annual IEEE/ACM International Symposium on Microarchitecture
A Hierarchical Thread Scheduler and Register File for Energy-Efficient Throughput Processors
ACM Transactions on Computer Systems (TOCS)
Energy efficient special instruction support in an embedded processor with compact isa
Proceedings of the 2012 international conference on Compilers, architectures and synthesis for embedded systems
Scheduling for register file energy minimization in explicit datapath architectures
DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
ACM Transactions on Architecture and Code Optimization (TACO)
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Operand register files are small, inexpensive register files that are integrated with function units in the execute stage of the pipeline, effectively extending the pipeline operand registers into register files. Explicit operand forwarding lets software opportunistically orchestrate the routing of operands through the forwarding network to avoid writing ephemeral values to registers. Both mechanisms let software capture short-term reuse and locality close to the function units, improving energy efficiency by allowing a significant fraction of operands to be delivered from inexpensive registers that are integrated with the function units. An evaluation shows that capturing operand bandwidth close to the function units allows operand registers to reduce the energy consumed in the register files and forwarding network of an embedded processor by 61%, and allows explicit forwarding to reduce the energy consumed by 26%.