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From "xiaoming gu" <xiaoming...@gmail.com>
Subject Re: discussion for H5022
Date Mon, 03 Nov 2008 06:00:35 GMT
So in 64-bit platform with compressed pointer, the base address for heap is
still 64-bit but the offset is 32-bit.

Got it. Thanks. -Xiaoming

On Mon, Nov 3, 2008 at 12:21 PM, Xiao-Feng Li <xiaofeng.li@gmail.com> wrote:

> Xiaoming, I think this work is only related with X86-64, the 64bit
> machine. In a 32bit platform, there is no such concept of 64-bit base
> address. In 64-bit platform with compressed pointer, we have a base
> address and a 32-bit offset for one pointer.
>
> Thanks,
> xiaofeng
>
> On Mon, Nov 3, 2008 at 11:52 AM, xiaoming gu <xiaoming.gu@gmail.com>
> wrote:
> > Hi, guys. I'm studying H5022 - incorrect codegeneration of compressed obj
> > arithmetics[1]. In my understanding, the problem is that current JIT
> casts
> > heap base address from 64-bit to 32-bit compulsorily in IA32 but that
> > address must be in 64-bit even in a 32-bit platform. If I catch the point
> of
> > this jira correctly, I'll try to delete the casts in
> > Ia32InstCodeSelector.cpp recently. Any comment? Thanks.
> >
> > Xiaoming
> >
> > [1] - https://issues.apache.org/jira/browse/HARMONY-5022
> >
>
>
>
> --
> http://xiao-feng.blogspot.com
>

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