On 08/15/2011 12:27 PM, Bernhard Walle wrote: > * Marc Kleine-Budde <[email protected]> [2011-08-15 12:25]: >> On 08/15/2011 12:20 PM, Juergen Beisert wrote: >>> Marc Kleine-Budde wrote: >>>> On 08/14/2011 12:51 PM, Bernhard Walle wrote: >>>>> The toolchain has been tested with a so-called Bifferboard >>>>> (http://bifferos.co.uk/) which has a S3282 BGA CPU (R861x/R321x >>>>> equivalent) that understands 486SX instructions. >>>> >>>> What about the FPU? Does the cpu support float instructions? Does the >>>> toolchain genereate them? >>> >>> 486*SX* means no FPU. 486*DX* means with FPU. >> >> What does "cat /proc/cpuinfo" show? >> >> So the processor doesn't support fpu, does the toolchain generate FPU >> instructions? > > No, the CPU has no FPU. But the kernel is able to emulate the FPU, > so it's just slow but it works. > > I just didn't manage to create a i486 toolchain with soft-float. > See also http://old.nabble.com/i486-toolchain-with-softfloat-td31879412.html. > > The hint about multilib didn't help either. Do you have any ideas?
You have to build the compiler with no fpu support - and probably the glibc, too. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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