Re: m68k FPU emulation: Unimplemented instruction

[Mikael Pettersson <mikpelinux@gmail.com>]

Thorsten Glaser writes:
 > Ingo Jürgensmann dixit:
 > 
 > > echo line to know which module is currently compiled) you might find the module
 > > in question that generates that FPU error and investigate further then.
 > 
 > It’s not an error. Python (rightfully) runs some FPU instruction,
 > it just happens to be one the FPU emulator lacks, because it’s
 > incomplete.
 > 
 > Maybe we can have a GCC -m* flag that tells it to not emit those
 > instructions? (Maybe call library functions then or something.)

FLOGN was implemented in HW on 68881/2, but traps as unimplemented
on 040/060.  GCC cannot generate it, but <math-68881.h> contains some
functions that emit it via inline asm().  Dunno about GLIBC.

I suggest extending the kernel's FPU emulator to handle it.

/Mikael