Multiplier circuit with dynamic energy consumption adjustment

摘要

A fixed point multiplier that can be used in mobile computer systems operating under limited power constraints provides a trade-off between computational accuracy and energy consumption that may be changed dynamically for energy conservation purposes. In one embodiment, the multiplier pre-stores multiplication shift coefficients to eliminate leading-one circuitry normally used in shift and accumulate multipliers.

主权项

1. An electronic computer system comprising:
a processor providing for execution of arithmetic and logic instructions and including a fixed point multiplier circuit for multiplication of data values, wherein the multiplier circuit provides a variable accuracy; and an accuracy controller communicating with the multiplier circuit to change the accuracy of the multiplier circuit during execution of instructions by the processor.