The application relates to a hierarchical addition
tree structure module with fine-grained accurate reconfigurable approximate calculation, comprising a multi-
data input module, an
adder tree structure generation module, a calculation and result output module; the multi-
data input module receives addends and defines approximate
adder calculation, and receives user required precision configuration; the
adder tree structure generation module input end receives addition numbers; after initialization, the number of addition tree
layers will be transmitted to the approximate
adder tree structure module to complete generation of the fine-grained accurate reconfigurable approximate adder module; the calculation and result output module performs approximate addition operation on the approximate adder generated in the previous stage to complete the final approximate calculation task, and controls the precision required by each layer in the approximate calculation process. The application realizes approximate addition calculation on a
data vector, higher energy efficiency and appropriate precision, and solves the problem that the existing approximate adder configuration scheme cannot cope with
data vector calculation.