progs/fib.j
author Christian Urban <urbanc@in.tum.de>
Wed, 10 May 2017 17:03:21 +0100
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permissions -rw-r--r--
updated
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.class public fib.fib
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.super java/lang/Object
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.method public <init>()V
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   aload_0
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   invokenonvirtual java/lang/Object/<init>()V
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   return
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.end method
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.method public static write(I)V 
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    .limit locals 1 
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    .limit stack 2 
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    getstatic java/lang/System/out Ljava/io/PrintStream; 
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    iload 0
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    invokevirtual java/io/PrintStream/println(I)V 
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    return 
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.end method
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.method public static read()I 
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    .limit locals 10 
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    .limit stack 10
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    ldc 0 
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    istore 1  ; this will hold our final integer 
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Label1: 
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    getstatic java/lang/System/in Ljava/io/InputStream; 
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    invokevirtual java/io/InputStream/read()I 
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    istore 2 
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    iload 2 
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    ldc 10   ; the newline delimiter 
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    isub 
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    ifeq Label2 
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    iload 2 
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    ldc 32   ; the space delimiter 
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    isub 
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    ifeq Label2
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    iload 2 
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    ldc 48   ; we have our digit in ASCII, have to subtract it from 48 
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    isub 
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    ldc 10 
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    iload 1 
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    imul 
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    iadd 
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    istore 1 
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    goto Label1 
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Label2: 
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    ;when we come here we have our integer computed in local variable 1 
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    iload 1 
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    ireturn 
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.end method
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.method public static main([Ljava/lang/String;)V
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   .limit locals 200
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   .limit stack 200
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invokestatic fib/fib/read()I
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istore 0
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ldc 0
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istore 1
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ldc 1
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istore 2
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ldc 0
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istore 3
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Loop_begin_2:
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ldc 0
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iload 0
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if_icmpge Loop_end_3
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iload 2
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istore 3
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iload 1
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iload 2
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iadd
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istore 2
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iload 3
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istore 1
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iload 0
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ldc 1
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isub
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istore 0
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goto Loop_begin_2
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471
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Loop_end_3:
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iload 1
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invokestatic fib/fib/write(I)V
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   return
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.end method