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Re: Bug related to floating-point traps?
On 2005-06-15 15:45:34 +0200, Gabriel Paubert wrote:
> The exception flags are sticky. So you get the exception because
> operations before feenableexcept set the overflow flag.
I know that the flags are sticky. But I thought the traps were linked
to the FP operations only (not to the flags).
> The difference is that the PPC triggers the exception as soon
> as you unmask the exception while the x86 only checks for
> pending exceptions at the beginning of an arithmetic FP instruction.
OK, the PPC behavior seems to be more logical to me.
[...]
> On x86, SSE exception handling is much saner.
and the rounding precision too. :)
Thanks for the explanations.
--
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
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Work: CR INRIA - computer arithmetic / SPACES project at LORIA