ia64/120315: commit references a PR

[dfilter service]

The following reply was made to PR ia64/120315; it has been noted by GNATS.

From: dfilter at FreeBSD.ORG (dfilter service)
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: ia64/120315: commit references a PR
Date: Tue,  8 Dec 2009 00:44:36 +0000 (UTC)

 Author: marcel
 Date: Tue Dec  8 00:44:23 2009
 New Revision: 200240
 URL: http://svn.freebsd.org/changeset/base/200240
 
 Log:
   In exception_save, write-back ar.rnat after switching the backing-
   store. Writing to ar.bspstore is defined to leave ar.rnat undefined.
   
   PR:		ia64/120315
   MFC after:	3 days
 
 Modified:
   head/sys/ia64/ia64/exception.S
 
 Modified: head/sys/ia64/ia64/exception.S
 ==============================================================================
 --- head/sys/ia64/ia64/exception.S	Mon Dec  7 21:30:54 2009	(r200239)
 +++ head/sys/ia64/ia64/exception.S	Tue Dec  8 00:44:23 2009	(r200240)
 @@ -228,43 +228,42 @@ exception_save_restart:
  (p13)	dep		r20=r20,r21,0,9		// align dirty registers
  	;;
  }
 -	// r20=bspstore, r22=iip, r23=ipsr
 +	// r19=rnat, r20=bspstore, r22=iip, r23=ipsr
  {	.mmi
  	st8		[r31]=r23,16		// psr
  (p13)	mov		ar.bspstore=r20
  	nop		0
  	;;
  }
 -{	.mmi
 +{	.mmb
 +(p13)	mov		ar.rnat=r19
  	mov		r18=ar.bsp
 -	;;
 -	mov		r19=cr.ifs
 -	sub		r18=r18,r20
 +	nop		0
  	;;
  }
  {	.mmi
 +	mov		r19=cr.ifs
  	st8.spill	[r30]=gp,16		// gp
 -	st8		[r31]=r18,16		// ndirty
 -	nop		0
 +	sub		r18=r18,r20
  	;;
  }
  	// r19=ifs, r22=iip
 -{	.mmi
 +{	.mmb
 +	st8		[r31]=r18,16		// ndirty
  	st8		[r30]=r19,16		// cfm
 -	st8		[r31]=r22,16		// iip
  	nop		0
  	;;
  }
  {	.mmi
 -	st8		[r30]=r17		// ifa
  	mov		r18=cr.isr
 +	st8		[r31]=r22,16		// iip
  	add		r29=16,r30
  	;;
  }
 -{	.mmi
 -	st8		[r31]=r18		// isr
 -	add		r30=8,r29
 -	add		r31=16,r29
 +{	.mmb
 +	st8		[r30]=r17,24		// ifa
 +	st8		[r31]=r18,24		// isr
 +	nop		0
  	;;
  }
  {	.mmi
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