[src/trunk]: src/sys/arch/amd64/amd64 Use macros clts/stts instead of directl...

[cherry <cherry%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ae39535822b8
branches:  trunk
changeset: 762982:ae39535822b8
user:      cherry <cherry%NetBSD.org@localhost>
date:      Mon Mar 07 02:24:57 2011 +0000

description:
Use macros clts/stts instead of directly manipulating CR0 flags.
Expose fpuinit to XEN build. (remove #ifdef XEN)

diffstat:

 sys/arch/amd64/amd64/fpu.c |  10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diffs (39 lines):

diff -r 58eea0cce6b7 -r ae39535822b8 sys/arch/amd64/amd64/fpu.c
--- a/sys/arch/amd64/amd64/fpu.c        Mon Mar 07 02:02:36 2011 +0000
+++ b/sys/arch/amd64/amd64/fpu.c        Mon Mar 07 02:24:57 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu.c,v 1.33 2010/12/20 00:25:24 matt Exp $    */
+/*     $NetBSD: fpu.c,v 1.34 2011/03/07 02:24:57 cherry Exp $  */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.  All
@@ -100,7 +100,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu.c,v 1.33 2010/12/20 00:25:24 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu.c,v 1.34 2011/03/07 02:24:57 cherry Exp $");
 
 #include "opt_multiprocessor.h"
 
@@ -155,18 +155,16 @@
 void fpudna(struct cpu_info *);
 static int x86fpflags_to_ksiginfo(uint32_t);
 
-#ifndef XEN
 /*
  * Init the FPU.
  */
 void
 fpuinit(struct cpu_info *ci)
 {
-       lcr0(rcr0() & ~(CR0_EM|CR0_TS));
+       clts();
        fninit();
-       lcr0(rcr0() | (CR0_TS));
+       stts();
 }
-#endif
 
 /*
  * Record the FPU state and reinitialize it all except for the control word.