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On 11/01/13 11:05, Artyom Tarasenko wrote:
Actually from this article I don't see that exception is happening in the Firmware. I'm very surprised, but our tests on RS/6000 (PReP) and Beige Rev 1 (thanks dreadbit for testing that!) show that PPC firmware allows division by zero:
0> 1 0 / ok 1> 0 0 / ok 2> . 0 ok 1> . 0 ok 0>
It would be interesting to know what happens on a CHRP platform, can anyone check?
I guess it must depend on whether or not the divide by zero trap is enabled - at least definitely in the C portion of OpenBIOS, a divide by zero will definitely trap on QEMU's PPC implementation.
I have a slightly less invasive patch than my last which I shall post to the list in a moment.