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

Sven Barth pascaldragon at googlemail.com
Tue Aug 30 09:59:43 CEST 2011

Am 30.08.2011 09:59, schrieb Michael Schnell:
> On 08/29/2011 05:58 PM, Hans-Peter Diettrich wrote:
>>> 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. While of course FPC does acknowledge the
> count and kind of registers with targets like ARM or X86 or X86-64, Sven
> reported that his port for Java targets creates register-ignorant (stack
> based) code for standard (SUN) virtual Java machines and the
> "dex-converter" by Google converts this to 16-bit-wide Dalvik code which
> introduces Register notation.

Honor to whom honor is due: the port is completely Jonas' work. I 
haven't modified a single line of code to get code working on Android. I 
just recompiled it once to disable debug information :D


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