Messages in this thread | | | Date | Sun, 30 Jul 2006 21:11:07 +0300 | From | Avi Kivity <> | Subject | Re: FP in kernelspace |
| |
Andi Kleen wrote: > > Avi Kivity <avi@argo.co.il> writes: > > > > It's also broken for x86-64, which uses sse for floating point, not > > the x87 fpu. > > Sorry, that doesn't make sense. >
> > kernel_fpu_begin(); > > c = d * 3.14; > > kernel_fpu_end();
Cannot work on x86-64, even disregarding fp exceptions, because kernel_fpu_begin() doesn't save the sse state which is used by fp math.
No?
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |