From 4e457245b256be879ef61bc63f432301039862f2 Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Thu, 21 May 2015 00:44:49 +0000
Subject: [PATCH] [FAST486] Fix the broken math in r67838.

svn path=/trunk/; revision=67839
---
 reactos/lib/fast486/fpu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/reactos/lib/fast486/fpu.c b/reactos/lib/fast486/fpu.c
index ab778bd909b..0b4ceecdf0d 100644
--- a/reactos/lib/fast486/fpu.c
+++ b/reactos/lib/fast486/fpu.c
@@ -747,9 +747,8 @@ Fast486FpuAdd(PFAST486_STATE State,
             }
             else
             {
-                /* Lose the MSB */
-                TempResult.Mantissa <<= 1;
-                TempResult.Exponent--;
+                /* Reverse the mantissa */
+                TempResult.Mantissa = -(LONGLONG)TempResult.Mantissa;
             }
         }
     }