float a = 1+1; costs 17 bytecode. #400

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1. revalo

   closed this as completedon Jan 14, 2017
2. lnductor commented on Jan 14, 2017

   

   lnductor

   on Jan 14, 2017

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   (It was actually 2, and the printing/calculating bytecode part used 15 alone)
3. kazimuth commented on Jan 14, 2017

   

   kazimuth

   on Jan 14, 2017

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   float z = 1 + 1;

   generates:

    L0
       LINENUMBER 8 L0
       FCONST_2
       FSTORE 1
       LDC 2
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
   

   Which is what would be expected.

   int bc_base = Clock.getBytecodeNum();
   float a = 1 + 1;
   System.out.println("Bytecode Cost: " + (Clock.getBytecodeNum() - bc_base));
   

     L0
       LINENUMBER 11 L0
       INVOKESTATIC battlecode/common/Clock.getBytecodeNum ()I
       ISTORE 1
       LDC 1
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
      L1
       LINENUMBER 12 L1
       FCONST_2
       FSTORE 2
       LDC 2
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
      L2
       LINENUMBER 13 L2
       GETSTATIC battlecode/instrumenter/inject/System.out : Ljava/io/PrintStream;
       NEW java/lang/StringBuilder
       DUP
       INVOKESPECIAL java/lang/StringBuilder.<init> ()V
       LDC "Bytecode Cost: "
       INVOKEVIRTUAL java/lang/StringBuilder.append (Ljava/lang/String;)Ljava/lang/StringBuilder;
       LDC 14
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
       INVOKESTATIC battlecode/common/Clock.getBytecodeNum ()I
       ILOAD 1
       ISUB
       INVOKEVIRTUAL java/lang/StringBuilder.append (I)Ljava/lang/StringBuilder;
       INVOKEVIRTUAL java/lang/StringBuilder.toString ()Ljava/lang/String;
       INVOKEVIRTUAL java/io/PrintStream.println (Ljava/lang/String;)V
       LDC 12
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
      L3
       LINENUMBER 14 L3
       LDC 1
       INVOKESTATIC battlecode/instrumenter/inject/RobotMonitor.incrementBytecodes (I)V
       RETURN
      L4
       LOCALVARIABLE rc Lbattlecode/common/RobotController; L0 L4 0
       LOCALVARIABLE bc_base I L1 L4 1
       LOCALVARIABLE a F L2 L4 2
       MAXSTACK = 4
       MAXLOCALS = 3
   
4. kazimuth

   reopened this on Jan 14, 2017
5. kazimuth commented on Jan 14, 2017

   

   kazimuth

   on Jan 14, 2017

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   I still want to look into unexpected bytecode costs, so I'll keep this open.