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1. (WO2015118375) PROCESSOR THAT PERFORMS APPROXIMATE COMPUTING INSTRUCTIONS

Pub. No.:    WO/2015/118375    International Application No.:    PCT/IB2014/003160
Publication Date: Fri Aug 14 01:59:59 CEST 2015 International Filing Date: Mon Dec 15 00:59:59 CET 2014
IPC: G06F 13/00
Applicants: VIA ALLIANCE SEMICONDUCTOR CO., LTD.
Inventors: HENRY, Glenn, G.
PARKS, Terry
HOOKER, Rodney, E.
Title: PROCESSOR THAT PERFORMS APPROXIMATE COMPUTING INSTRUCTIONS
Abstract:
A processor includes a decoder that decodes an instruction that instructs the processor to perform subsequent computations in an approximate manner and a functional unit that performs the subsequent computations in the approximate manner in response to the instruction. An instruction instructs the processor to clear an error amount associated with a value stored in a general purpose register of the processor. The error amount indicates an amount of error associated with a result of a computation performed by the processor in an approximate manner. The processor also clears the error amount in response to the instruction. Another instruction specifies a computation to be performed and includes a prefix that indicates the processor is to perform the computation in an approximate manner. The functional unit performs the computation specified by the instruction in the approximate manner specified by the prefix.