rewasm/examples/loop.wat at master · benediktwerner/rewasm · GitHub

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(module
    (func (param i32 i32) (result i32) (local i32 i32)
        block
            loop
                get_local 0
                i32.const 0
                i32.le_s
                br_if 1

                get_local 1
                set_local 2

                block
                    loop
                        get_local 2
                        i32.const 0
                        i32.le_s
                        br_if 1

                        get_local 3
                        i32.const 1
                        i32.add
                        set_local 3

                        get_local 2
                        i32.const -1
                        i32.add
                        set_local 2
                        br 0
                    end
                end

                get_local 0
                i32.const -1
                i32.add
                set_local 0
                br 0
            end
        end
        get_local 3
    )
)