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Re: [Qemu-devel] Windows CE QEMU Port (PocketPC 2003, ARM CPU)

From: Chad Page
Subject: Re: [Qemu-devel] Windows CE QEMU Port (PocketPC 2003, ARM CPU)
Date: Thu, 25 Nov 2004 09:20:52 -0800 (PST)

On Thu, 25 Nov 2004, mamaich wrote:

> And I\'ve noticed one strange thing. Nbench Fourier test
> running
> natively on my device gives 12.655 iterations/sec, but
> under QEMU
> running linux it is about 5 times faster (71
> iterations/sec)! How
> this can be? All other tests behave as expected,
> emulated speed is
> 4-6 times slower than native. Maybe this is due to bugs
> in floating point emulation?
> Is there a test for floating point that can be run from
> DOS?
> My device is i-Mate PocketPC, 400Mhz, 128 Ram, Pocket
> PC 2003 OS.

        ARM chips have no FPU, so the emulation would take longer because
it has to use integer instructions...

        - Chad
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