Instruction packing: reducing power and delay of the dynamic scheduling logic
ISLPED '05 Proceedings of the 2005 international symposium on Low power electronics and design
Low-power, low-complexity instruction issue using compiler assistance
Proceedings of the 19th annual international conference on Supercomputing
Power-Efficient Wakeup Tag Broadcast
ICCD '05 Proceedings of the 2005 International Conference on Computer Design
Instruction packing: Toward fast and energy-efficient instruction scheduling
ACM Transactions on Architecture and Code Optimization (TACO)
Exploiting Operand Availability for Efficient Simultaneous Multithreading
IEEE Transactions on Computers
Process variation aware issue queue design
Proceedings of the conference on Design, automation and test in Europe
Non-uniform instruction scheduling
Euro-Par'05 Proceedings of the 11th international Euro-Par conference on Parallel Processing
Instruction recirculation: eliminating counting logic in wakeup-free schedulers
Euro-Par'05 Proceedings of the 11th international Euro-Par conference on Parallel Processing
PACS'04 Proceedings of the 4th international conference on Power-Aware Computer Systems
Compiler directed issue queue energy reduction
Transactions on High-Performance Embedded Architectures and Compilers IV
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As technology evolves, power density significantly increases and cooling systems become more complex and expensive. The issue logic is one of the processor hotspots and, at the same time, its latency is crucial for the processor performance. This paper presents a low-complexity FP issue logic (MB_distr) that achieves high performance with small energy requirements. The MB_distr scheme is based on classifying instructions and dispatching them into a set of queues depending on their data dependences. These instructions are selected for issuing based on an estimation of when their operands will be available, so the conventional wakeup activity is not required. Additionally, the functional units are distributed across the different queues. The energy required by the proposed scheme is substantially lower than that required by a conventional issue design, even if the latter has the ability of waking-up only unready operands. MB_distr scheme reduces the energy-delay2 product by 35% and the energy-delay product by 18% with respect to a state-of-the-art approach.