MPC5xxx中的主题 Re: MPC5554 divide-by-zero exception on an integer

MPC5554 divide-by-zero exception on an integer

schlosserolivie — Thu, 31 Oct 2013 09:18:08 GMT

Hello,

I am trying to generate an interrupt in case divide-by-zero.

This is working on divide float instruction but not on a divide integer instruction ("divw").

On a divide integer instruction, the result of a divide-by-zero is the maximum value (0xFFFFFFFF).

I do not find any configuration on the processor to force an interrupt. Do some one did it ?

Thanks

Olivier

Re: MPC5554 divide-by-zero exception on an integer

lukaszadrapa — Fri, 08 Nov 2013 11:00:23 GMT

Hi Olivier,

Unfortunately, the integer division instructions implemented in the e200z6 core (MPC5554) do not generate an exception when a division by zero is performed.

I just tested integer division (both SPE and non-SPE division instructions) but the result

was the expected one: only the overflow bits get set when a division by zero is executed.

Lukas

Re: MPC5554 divide-by-zero exception on an integer

schlosserolivie — Fri, 08 Nov 2013 11:14:19 GMT

Ok, thank you for your help.

Olivier