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linguist/samples/WebAssembly/fibonacci.wat

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(module
(import "env" "printInt" (func $printInt (param i32)))
(import "env" "print" (func $print (param i32 i32)))
(memory $memory 1)
(data (i32.const 0) "\n")
(data (i32.const 1) " ")
(func $endl
(call $print (i32.const 0) (i32.const 1)))
(func $space
(call $print (i32.const 1) (i32.const 1)))
(func $fibonacci_rec (param $a i32) (param $b i32) (param $n i32) (result i32)
(if (i32.eqz (get_local $n)) (return (get_local $a)))
(call $printInt (get_local $b))
(call $space)
(set_local $a (i32.add (get_local $a) (get_local $b)))
(call $fibonacci_rec (get_local $b) (get_local $a) (i32.sub (get_local $n) (i32.const 1)))
)
(func $fibonacci_iter (param $a i32) (param $b i32) (param $n i32) (result i32)
(loop $fi
(if (i32.eqz (get_local $n)) (return (get_local $a)))
(call $printInt (get_local $b))
(call $space)
(set_local $b (i32.add (get_local $a) (get_local $b)))
(set_local $a (i32.sub (get_local $b) (get_local $a)))
(set_local $n (i32.sub (get_local $n) (i32.const 1)))
(br $fi))
(get_local $b))
(func $main
(drop (call $fibonacci_rec (i32.const 0) (i32.const 1) (i32.const 9)))
(call $endl)
(drop (call $fibonacci_iter (i32.const 0) (i32.const 1) (i32.const 9))))
(export "main" (func $main))
(export "memory" (memory $memory))
)