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Some elaboration on main interpretation loop and JVMs on different platforms. |
Added list of instruction groups |
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The JVM has a stack based architecture. Each thread has its own program counter.
The JVM has instructions for the following groups of tasks
* Load and store
* Arithmetic
* Type conversion
* Object Creation and Manipulation
* Operand stack management (push / pop)
* Control transfer (branching)
* Method invocation and return
* Throwing exceptions
Each particular [[operating system]] needs a JVM specifically for it. These JVMs interprete the byte code semantically the same way. But the actual implementation may be different.
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