To easily obtain a plurality of circuit designs by only carrying out circuit setting once with a mapping tool.

In this integrated circuit, at least some of connecting wires between an array of basic tiles for constructing a reconstructable integrated circuit are connected in an n (n denotes an integer ≥1) dimensional torus shape. In the circuit setting formation method for this integrated circuit, a plurality of different circuit settings having the same function achieved on the reconstructable integrated circuit, but having performance obeying different probability variables are formed by moving one circuit setting in the torus-shaped connection direction in the basic tile array.

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