From ace025dca923090d9487f85be03c81ad2db953e5 Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Wed, 13 Nov 2013 18:14:01 +0000
Subject: [PATCH] [FAST486] The bit number should be normalized to [0,
 DataSize- 1], not [0, 2 ^ DataSize - 1].

svn path=/branches/ntvdm/; revision=60975
---
 lib/fast486/extraops.c | 8 ++++----
 lib/fast486/opgroups.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/fast486/extraops.c b/lib/fast486/extraops.c
index 046ad9e1a5f..8d57bfc16f9 100644
--- a/lib/fast486/extraops.c
+++ b/lib/fast486/extraops.c
@@ -566,7 +566,7 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBitTest)
     }
 
     /* Normalize the bit number */
-    BitNumber &= (1 << DataSize) - 1;
+    BitNumber %= DataSize;
 
     if (OperandSize)
     {
@@ -748,7 +748,7 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBts)
     }
 
     /* Normalize the bit number */
-    BitNumber &= (1 << DataSize) - 1;
+    BitNumber %= DataSize;
 
     if (OperandSize)
     {
@@ -1207,7 +1207,7 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBtr)
     }
 
     /* Normalize the bit number */
-    BitNumber &= (1 << DataSize) - 1;
+    BitNumber %= DataSize;
 
     if (OperandSize)
     {
@@ -1432,7 +1432,7 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeBtc)
     }
 
     /* Normalize the bit number */
-    BitNumber &= (1 << DataSize) - 1;
+    BitNumber %= DataSize;
 
     if (OperandSize)
     {
diff --git a/lib/fast486/opgroups.c b/lib/fast486/opgroups.c
index fd996619415..46ad2344b52 100644
--- a/lib/fast486/opgroups.c
+++ b/lib/fast486/opgroups.c
@@ -1921,7 +1921,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FBA)
     }
 
     /* Normalize the bit number */
-    BitNumber &= (1 << DataSize) - 1;
+    BitNumber %= DataSize;
 
     if (OperandSize)
     {