hey, thanks for your information, that really helped :D The HTC Dream has MSM7201A as CPU. I found the following spec for it: http://pdadb.net/index.php?m=cpu&id=a7201a&c=qualcomm_msm7201a
can you tell me what by "ARM9 coprocessor" is meant? what is that coprocessor for? On 22 Feb., 19:53, David Turner <[email protected]> wrote: > The HTC Dream doesn't have an FPU, or we would be using it :-) The Verizon > Droid and Google Nexus One do have one though. > > Keep in mind that "VFP" is really an umbrella for different ARM FPU > technologies: > > If I remember correctly: > > VFPv1 is now obsolete > VFPv2 is an optional instruction set for ARMv5/ARMv6 CPUs. > VFPv3 is used on ARMv7-based CPU, it is not compatible with VFPv2 as far as > I know. > > Also, there is VFPv3-D16 and VFPv3-D32, where the difference is that the > former provides 16 64-bit FP registers to the CPU, > while the latter provides 32. Which one is exactly implemented depends on > the exact CPU model. > > Whether OpenGL is faster using floats or fixed points depends on the GPU. I > believe that embedded GPUs only really > support fixed point at that point (and the driver performs floats->fixed > point conversions for you). > > The only way to tell is to benchmark on specific devices and compare the > results. > > On Mon, Feb 22, 2010 at 2:26 AM, [email protected] < > > [email protected]> wrote: > > I'm currently developing a application on a HTC Dream aka T-mobile G1. > > afaik the processor has a FPU coprocessor, called VFP (Vector Floating > > Point) in ARM terms. So far I couldn't find any information about if > > the FPU is used for floating point calculations or if those are > > emulated in software. does anyone have any information about that? > > the opengl implementation supports both fixed point and floating > > point. will my applications be slower when I'm using floating point, > > because they get transformed into fixed point internally? or is > > floating point implemented in hardware? > > thanks for any information in advance :D > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
