x86_64 support - v8-users

Message from discussion x86_64 support

Erik Corry

More options Sep 3 2008, 7:24 am

From: Erik Corry <erik.co...@gmail.com>

Date: Wed, 3 Sep 2008 04:24:08 -0700 (PDT)

Local: Wed, Sep 3 2008 7:24 am

Subject: Re: x86_64 support

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I think what roslof probably meant was whether we planned to create a
64 bit version of V8.

This hasn't been decided yet. Chromium is 32 bit at the moment, and
since all OSs still support 32 bit programs this isn't a pressing
issue.

Since JavaScript is a dynamically typed language you always have to
reserve space for an object reference so a 64 bit version of V8 would
use almost twice as much memory for objects and on stacks. Code would
also grow. At the moment there is no register allocation worth
speaking of in the code generator so there would be no immediate
benefit from the extra registers available to 64 bit code.

On Sep 3, 10:42 am, Christian Plesner Hansen

<christian.plesner.han...@gmail.com> wrote:
> There should be no problems running v8 on x86_64. Internally v8 only
> ever runs 32 bit so the ia32 architecture is also used on x86_64.

> On Sep 3, 9:54 am, roelof.na...@gmail.com wrote:

> > hi

> > are there any plans to support x86_64? from the code it looks like
> > only ia32 and arm are supported.

> > regards
> > roelof.

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