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    SubjectRe: 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.

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