[Bug 250454] PT_GETFPREGS on i386 oversimplifies translating FPU Tag Word

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250454

--- Comment #1 from Michał Górny <mgorny at gentoo.org> ---
Created attachment 218882
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=218882&action=edit
Proposed patch

Here's a patch based on the similar problem fixed on NetBSD.

Without the patch, the test program outputs 0x03ff, i.e.:

  0000 0011 1111 1111

With the patch, it outputs 0x63ff:

  0110 0011 1111 1111

Please note that I've only been able to test the compat32 version on amd64. 
FreeBSD/i386 does not seem to boot on qemu for me.

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