deep

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====== Java Crosscompiler ======

<box right red 40% | IMPORTANT Limitations>
Currently our compiler has the following limitations:
  * Arrays are supported up to three dimensions. 
  * Array size in any dimension must not exceed 2<sup>16</sup> bytes.
  * ''synchronized'' not yet implemented. 
  * Bytecode instruction ''invokedynamic'' not yet implemented. Used for lambda functions from Java 8 onwards.
</box>

A Java compiler converts a Java file into Bytecode which is stored in a class file. A class file represents the original program in a compact binary form and could be interpreted by a JVM. Our deep compiler translates this Bytecode directly into target machine code. To optimize for speed and code size and to make use of register based architecture - such as the Power-PC or ARM microarchitecture - we transform the Bytecode in a first step into Static Single Assignment Form (SSA). This form is simple and platform independent and can be used for various optimizations. In a second step registers are allocated and code is generated   

  * [[Deep Projects]] \\
  * [[Hardware|Accessing the Hardware]] \\
  * [[Lowlevel|Low-level Routines]] \\
  * [[Donts| Do's and Don'ts]] \\

deep

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