Le 05/12/2015 20:59, Thorsten Glaser a écrit : > Dixi quod… >> Laurent Vivier dixit: >>> Le 21/11/2015 13:07, Andreas Schwab a icrit : >> >>>> Does that include the FPU emulation? >>> >>> I don't know: FPU emulation is on 96 bits (in fact 80...) and can have >>> some bugs (I didn't fix the NaN format for the moment). >> >> In this case, e.g. Python interpreters and related things (cffi/numpy?) >> built on qemu-m68k may be broken. > > It looks like Python running *on* qemu-m68k is, at the very least, > broken (probably precisely because it does funny things to the FPU):
I think qemu-m68k is emulating precisely the FPU. I've checked the result of testfloat on qemu-m68k, and moreover I've compared the result of softloat on my Quadra 800 (68040 FPU) against the result of qemu-m68k. As I said, NaN is not defined correctly but it should be hidden for all applications that will not check the bit encoding. http://www.jhauser.us/arithmetic/ https://github.com/vivier/m68k-testfloat https://github.com/vivier/m68k-softfloat Laurent
