[fpc-devel] FPC-JVM: Status report on Android

[Jonas Maebe]

On 30 Aug 2011, at 09:59, Michael Schnell wrote:

> On 08/29/2011 05:58 PM, Hans-Peter Diettrich wrote:
>>
>> Michael Schnell schrieb:
>>
>>> That is why I am astonished that converting Java-Bytecode to  
>>> Dalvik code should be an easy task.
>>
>> A stackbased internal or intermediate representation is the most  
>> general one, from which a compiler can decide which registers to  
>> use for expression evaluation etc.  FPC itself uses registers only  
>> for the actual code generation, depending on how many registers are  
>> available on the target machine.
> I don't see what you mean here.

He means that converting a stack based program representation (whether  
it's compiler-internal or Java byte code is irrelevant) of a program  
to a flat register file based program representation has been a solved  
problem since a long time ago. I tried to explain the same thing with  
my example of JIT compilers, which perform exactly the same task  
starting from exactly the same Java byte code.


Jonas