libffi & powerpc

[Andrew Haley]

Patrick Olinet writes:
 > >  > I thought that fpu emulation worked by trapping cpu exceptions when a
 > >  > fpu instruction is being executed and then emulating this instruction
 > >  > on software level.
 > >
 > > Yes.
 > >
 > >  > Isn't the mechanism implemented by the "--with-float=soft" option ?
 > >
 > > No.  FPU emulation requires no special compile-time options.  The
 > > whole idea is that it runs the same code as native FP.
 > >
 > > In contrast, soft-float generates inline subroutine calls for all
 > > floating-point operations.
 > 
 > ok, I get it. So, is there a way to add fpu emulation emulation to my
 > platform without having to change anything to my native binary code ?

It's the kernel's job.  Nothing at all to do with user space code.

Andrew.