Am 29.08.2011 10:58, schrieb Jonas Maebe:
On 29 Aug 2011, at 09:58, Michael Schnell wrote:
How did you manage to move from the 8 bit SUN Java bytecode to the 16
bit Android /Dalvik code ?
You are thinking of 8 and 16 bit in the wrong way. Those are simply
details of the respective byte code instruction formats. For example,
it's about whether an "add" instruction is encoded using 1 byte or using
2 bytes. It has nothing to do with the width of the executed operations
(the JVM byte code instruction set includes 64 bit integer and floating
point operations). Also note that this is only about the instruction
opcodes: if you include the operands then several JVM byte code
instructions are wider than 8 bit.
But there is a significant difference between the JVM bytecode and the
Dalvik one and perhaps Michael thought of that when writing his question:
The JVM bytecode is a pure stackbased one while the Dalvik one uses
registers.
Regards,
Sven
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