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Task/Fibonacci-sequence/Battlestar/fibonacci-sequence.battlestar

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+// Fibonacci sequence, recursive version
+fun fibb
+    loop
+        a = funparam[0]
+        break (a < 2)
+
+        a--
+
+        // Save "a" while calling fibb
+        a -> stack
+
+        // Set the parameter and call fibb
+        funparam[0] = a
+        call fibb
+
+        // Handle the return value and restore "a"
+        b = funparam[0]
+        stack -> a
+
+        // Save "b" while calling fibb again
+        b -> stack
+
+        a--
+
+        // Set the parameter and call fibb
+        funparam[0] = a
+        call fibb
+
+        // Handle the return value and restore "b"
+        c = funparam[0]
+        stack -> b
+
+        // Sum the results
+        b += c
+        a = b
+
+        funparam[0] = a
+
+        break
+    end
+end
+
+// vim: set syntax=c ts=4 sw=4 et: