From 6ea648632e52a71960daa1b7625aac19b486f418 Mon Sep 17 00:00:00 2001
From: Aleksey Bragin <aleksey@reactos.org>
Date: Sun, 14 Oct 2007 12:20:48 +0000
Subject: [PATCH] - Fixed a typo in the line which lead to actual zeroing of
 mxcsr, instead of zeroing only reserved bits (spotted by Kamil Hornicek aka
 "Pigglesworth"). - Improved the fix by actually applying the mask prepared
 earlier during kernel init (this is a more proper way to clear reserved bits
 of mxcsr). - SSE/SSE2/etc is not broken anymore. See issue #2748 for more
 details.

svn path=/trunk/; revision=29558
---
 reactos/ntoskrnl/ke/i386/exp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/ke/i386/exp.c b/reactos/ntoskrnl/ke/i386/exp.c
index e6e4543db4c..ac958ce532e 100644
--- a/reactos/ntoskrnl/ke/i386/exp.c
+++ b/reactos/ntoskrnl/ke/i386/exp.c
@@ -460,7 +460,7 @@ KeContextToTrapFrame(IN PCONTEXT Context,
                           MAXIMUM_SUPPORTED_EXTENSION);
 
             /* Remove reserved bits from MXCSR */
-            FxSaveArea->U.FxArea.MXCsr &= ~0xFFBF;
+            FxSaveArea->U.FxArea.MXCsr &= KiMXCsrMask;
 
             /* Mask out any invalid flags */
             FxSaveArea->Cr0NpxState &= ~(CR0_EM | CR0_MP | CR0_TS);