port-i386/43782: The value of MXCSR does not always equal to __INITIAL_MXCSR__

["Shkurko, Dmitry V" <dmitry.v.shkurko%intel.com@localhost>]

        Note: There was a bad value `high=20' for the field `Priority'.
        It was set to the default value of `medium'.

        Note: There was a bad value `serious=20' for the field `Severity'.
        It was set to the default value of `serious'.

>Number:         43782
>Category:       port-i386
>Synopsis:       The value of MXCSR does not always equal to __INITIAL_MXCSR__
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 19 06:40:00 +0000 2010
>Originator:     "Shkurko, Dmitry V" <dmitry.v.shkurko%intel.com@localhost>
>Release:        NetBSD 5.1_RC2
>Organization:
Intel
=09
>Environment:
System: NetBSD nsticlxb388 5.1_RC2 NetBSD 5.1_RC2 (GENERIC) #0: Fri May 21 =
04:32:33 UTC 2010 
builds%b8.netbsd.org@localhost:/home/builds/ab/netbsd-5-1-RC2/i386/=
201005210534Z-obj/home/builds/ab/netbsd-5-1-RC2/src/sys/arch/i386/compile/G=
ENERIC i386
Architecture: i386
Machine: i386
>Description:
        MXCSR_MASK field of the FXSAVE image is not initialized properly 
(en_rsvd3=
 field, file sys/arch/i386/include/npx.h)
        Please see "11.6.6 Guidelines for Writing to the MXCSR Register" in 
"Intel=
 64 and IA-32 Architectures Software Developers Manual Volume 1"
>How-To-Repeat:
        I was able to modify MXCSR in one process under GDB and obtain modified 
MX=
CSR in another process.
>Fix:
        Please refer to the documentation

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