On 01/24/2018 01:49 PM, Howard Spoelstra wrote: > Hi, > > I built qemu-system-ppc for OSX and Windows from > https://github.com/stsquad/qemu/tree/softfloat-refactor-and-fp16-v3 > and noticed a considerable drop in floating point performance on both > hosts. > Running Mac OS 9.2 in OSX, using MacBench 3.0, the score for the > floating point performance dropped from ~60 to ~42. > > Recent tcg optimisations had improved processor and floating point > performance considerably, but that gain seems to be more than lost for > the floating point performance. > > Any idea what is causing this?
Is this a 64-bit or a 32-bit build? We made a conscious choice to share code and use all 64-bit operations, under the assumption that x86_64 is the most common host. Otherwise we have not really done extensive benchmarking. r~
