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Emerging Technologies of Computation. Montek Singh COMP790-084 Oct 6 , 2011. Today: Probabilistic Design. Today’s topics: approximate arithmetic simple applications Next time: more applications architectures and design tools challenges and benefits open questions. - PowerPoint PPT Presentation
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Today’s topics:◦ approximate arithmetic◦ simple applications
Next time:◦ more applications◦ architectures and design tools◦ challenges and benefits◦ open questions
Today: Probabilistic Design
Supply reduced voltage to adder gates◦ fine-grain: each stage receives own voltage◦ coarse-grain: use binning
Probabilistic arithmetic
Voltage selection
◦ fine-grain: each stage receives own voltage
◦ coarse-grain: use binning
Probabilistic arithmetic
Geometric model for voltage assignment◦ higher order bit receives progressively higher
voltage
Probabilistic arithmetic
Lower voltage causes clock deadline to be missed◦ some of the longer carry chains cannot complete!
Delay-Induced Approximation