Hello,
Does anyone still care about the R2300? I ask because I'm working on
the FP context switching code & noticed that I'm pretty sure the
fpu_save_single & fpu_restore_single macros used only from
r2300_switch.S are broken. They store each 32 bit value at the start
of the location of the 64 bit FP registers context in memory, which I
believe:
1) Won't work for odd indexed FP registers with the FPU emulator,
ptrace or other code which assumes that 32 bit FP data is held in
the even-indexed 64 bit FP register context.
2) On big endian systems the 32 bit values will get saved to the most
significant bits of the 64 bit context which I imagine will cause
yet more problems.
It seems like the only changes to r2300_switch.S for a *long* time have
been to keep it in sync with r4k_switch.S & the CPU is old enough that
all I get when I google for it is information about some hay baler.
In short: does anyone care if I just submit a patch removing the R2300
code instead of blindly attempting to fix it up?
Thanks,
Paul
