janet/examples/assembly.dst

# Example of dst bytecode assembly

# Fibonacci sequence, implemented with naive recursion.
(def fibasm (asm/asm '{
  arity 1
  bytecode [
    (ldi 1 0x2)         # $1 = 2
    (lt 1 0 1)          # $1 = $0 < $1
    (jmpif 1 :done)     # if ($1) goto :done
    (lds 1)             # $1 = self
    (addim 0 0 -0x1)    # $0 = $0 - 1
    (push 0)            # push($0), push argument for next function call
    (call 2 1)          # $2 = call($1)
    (addim 0 0 -0x1)    # $0 = $0 - 1
    (push 0)            # push($0)
    (call 0 1)          # $0 = call($1)
    (addi 0 0 2)        # $0 = $0 + $2 (integers)
    :done
    (ret 0)             # return $0
  ]
}))