amd64/156464: fpsetprec does not work

[das at FreeBSD.org]

Synopsis: fpsetprec does not work

State-Changed-From-To: open->closed
State-Changed-By: das
State-Changed-When: Thu Oct 20 01:59:13 UTC 2011
State-Changed-Why: 
This is an historical, deprecated interface for the x87 FPU. For an
explanation of why it doesn't work as you expect on amd64, please see
the manual page or Bruce's reply.

http://www.freebsd.org/cgi/query-pr.cgi?pr=156464