[Bug 253617] ffs_sbget: panic: Unregistered use of FPU in kernel

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253617

Alex Richardson <arichardson at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Not A Bug

--- Comment #5 from Alex Richardson <arichardson at FreeBSD.org> ---
I just had a look at the QEMU TCG code for crc32 and it does not seem like it
can raise anything other than #UD.
Unless of course there is a bug in the decoding logic and it is treating

<+126>: crc32q %rsi,%rbx as a different instruction. GDB says the raw bytes are
as follows:
0xffffffff8105a4de <+126>:      f2 48 0f 38 f1 de       crc32q %rsi,%rbx
0xffffffff8105a4e4 <+132>:      f2 48 0f 38 f1 ca       crc32q %rdx,%rcx.
So this does sound like it must be a QEMU bug.

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