Basically all Intel CPUs since Pentium 4 (since year 2000) support
SSE2, as well as AMD K8 CPUs. The main group seemingly left out is
Athlons pre-K8 (e.g. the non-64 bit versions available through 2005).
Do we have any sense of how big a market is? Is this basically the
same thing as Win2K where it's a small user base that is shrinking?
2009/9/23 Adam Langley <a...@chromium.org>:
>
> On Wed, Sep 23, 2009 at 11:26 AM, Mark Mentovai <m...@chromium.org> wrote:
>> doing something wrong. Using SSE2 floating-point operations in a
>> configuration that we test and then using x87 floating-point
>> operations in a configuration that we release is completely bogus.
>
> The reality of the situation:
>
> * x87 doubles are 80-bits in registers and 64-bits in memory. This
> means that changing the optimisation flags of the compiler (and thus
> the spill profile of the code) changes rounding errors.
> * So, using x87 means that we would need two sets of image baselines:
> debug and release. It also means that different versions of GCC might
> end up needing their own baselines.
> * However, some people don't have SSE2 processors, so requiring it in
> Chrome branded builds would exclude them.
>
> I believe the current situation, impure as it is, is the best answer.
>
>
> AGL
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
Chromium Developers mailing list: chromium-dev@googlegroups.com
View archives, change email options, or unsubscribe:
http://groups.google.com/group/chromium-dev
-~----------~----~----~----~------~----~------~--~---
