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A detailed synthesis study has been performed on a functional unit from a recent IBM microprocessor to explore the voltage-frequency space for energy-efficient design points across a wide performance spectrum ranging from 625 MHz at 0.48V to 5.6 GHz at 0.95V. It is found that the optimal operating voltage depends strongly on frequency for an energy-efficient design. Circuit characteristics, as represented...
We present a nonintrusive concurrent error detection (CED) method for protecting the control logic of a contemporary floating-point unit (FPU). The proposed method is based on the observation that control logic errors lead to extensive data path corruption and affect, with high probability, the exponent part of the IEEE-754 floating-point representation. Thus, exponent monitoring can be utilized to...
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