On Wed, Jan 28, 2004 at 02:33:55PM -0500, Daniel Jacobowitz wrote:
> On Wed, Jan 28, 2004 at 11:26:36AM -0800, Rajesh Palani wrote:
> > Hi,
> > We are using a gcc 2.96 20000731 (Red Hat Linux 7.1 2.96-99.1) GCC
> > cross-compiler with -msoftfloat to use software floating point routines.
> > When we profied an application using the Linux Trace Toolkit, we
> > observed that there were a lot of CpU (Co-processor unusable) exceptions.
> > Some of the floating point routines ( eg. __floatdidf) expect values to be
> > passed in floating point registers and take FP exceptions even though the
> > application has been built with -msoftfloat. Is this a general MIPS/GCC
> > issue? What is the status of softfloat for MIPS in GCC?
> Try a more recent compiler, that one is ancient. If you configure
> correctly, you should get no references to the floating point registers
> at all.
If glibc is not compiled with -msoftfloat, I think you will get a few
FPU exceptions from glibc no matter how apps are compiled.
Actually, will it be a problem if glibc and apps are compiled differently
(such as in longjump, sig handling area)?