Niklaus Giger wrote:
Am Dienstag, 26. September 2006 18:28 schrieb Wolfgang Grandegger:
Philippe Gerum wrote:
On Tue, 2006-09-26 at 16:56 +0200, gilles.chanteperdrix wrote:
OK, but in general, soft-float emulation should be used on systems
without FPU and this is even more important for real-time. This is a
tool chain issue. Niklaus, what tool chain are you using?

In my .config I have MATH_EMULATION=y

You seem to need that because your compiler generates code with hard FP instructions. You could check this with:

 $ ppc-linux-objdump -d prog|egrep ":\s*[e-f]"

The toolchain is gcc-3.4.4-glibc-2.3.5/powerpc-405-linux-gnu built using Dan Kegel crosstool (Version 0.42 if I remember exactly).

Shall I switch to another one?

The ELDK from DENX uses FP soft-emulation for 4xx (
Choose  v3.1.1 for Linux 2.4 and v4 for Linux 2.6.


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