Re: [Freemint-discuss] FPU emulation

[Thorsten O. <ad...@th...>]

On Sonntag, 2. März 2025 20:51:48 CET Miro Kropáček wrote:
> Maybe you can quickly test it in Aranym,

That won't work, because i would need a linux/m68k kernel which has 
CONFIG_M68KFPU_EMU enabled.

But unless i missed something else, the lines 
https://github.com/torvalds/linux/blob/
7eb172143d5508b4da468ed59ee857c6e5e01da6/arch/m68k/kernel/vectors.c#L96

and 

https://github.com/torvalds/linux/blob/
7eb172143d5508b4da468ed59ee857c6e5e01da6/arch/m68k/kernel/vectors.c#L119

are rather clear: if the emulator is already installed, the FPSP won't be 
used.

>an application will succeed in executing fadd but not fsin? That doesn't 
make sense.

Yes, that is also something i don't understand. Without emulation of atleast 
the instructions that are supported by 040, the emulator is rather useless.
Maybe some rarely used opcodes like fsgldiv/fsdiv/fddiv etc. could be ommited, 
but not the trgonmetric functions.