This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: libffi & powerpc


 > 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 ?

Patrick


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]