On 7 September 2011 23:01, David Rusling <david.rusl...@linaro.org> wrote: > I'm a little confused. There's two comparisons to be made. > > The comparison between vfp enabled in all cases, comparing using the > soft float ABI with using the hard float ABI means that you'll identify > the effect of moving VFP registers in and out of integer registers to > make function call (soft float ABI) versus using them directly (hard > float ABI). > > The comparision of using VFP at all versus only using integer emulation > of floating point is separate and different. > > Both have an effect, the effects manifest themselves differently.
I don't think we need to run any tests at all to know the outcome of VFP (regardless of ABI) versus emulation. In addition to the above, a few applications have both floating-point and fixed-point implementations of the same algorithms with a compile- time choice of which is used. In these cases, a speed comparison is of course of interest, although one must keep in mind that the output is likely to be different, floating-point often having better accuracy. -- Mans Rullgard Multimedia mans.rullg...@linaro.org _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
