MdePkg/BaseLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / LowBitSet32.c

diff --git a/MdePkg/Library/BaseLib/LowBitSet32.c b/MdePkg/Library/BaseLib/LowBitSet32.c
index 5a21245264cd3d1422e719a3d9075551ca81bc42..64300367d638378cf011510ced2089645edbf4f0 100644 (file)
--- a/MdePkg/Library/BaseLib/LowBitSet32.c
+++ b/MdePkg/Library/BaseLib/LowBitSet32.c
@@ -1,17 +1,20 @@
 /** @file\r
   Math worker functions.\r
 \r
-  Copyright (c) 2006, Intel Corporation<BR>\r
-  All rights reserved. This program and the accompanying materials\r
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
+  This program and the accompanying materials\r
   are licensed and made available under the terms and conditions of the BSD License\r
   which accompanies this distribution.  The full text of the license may be found at\r
-  http://opensource.org/licenses/bsd-license.php\r
+  http://opensource.org/licenses/bsd-license.php.\r
 \r
   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
 \r
 **/\r
 \r
+\r
+\r
+\r
 #include "BaseLibInternals.h"\r
 \r
 /**\r
@@ -23,8 +26,8 @@
 \r
   @param  Operand The 32-bit operand to evaluate.\r
 \r
-  @return Position of the lowest bit set in Operand if found.\r
-  @retval -1 Operand is zero.\r
+  @retval 0..31  The lowest bit set in Operand was found.\r
+  @retval -1     Operand is zero.\r
 \r
 **/\r
 INTN\r
@@ -39,6 +42,6 @@ LowBitSet32 (
     return -1;\r
   }\r
 \r
-  for (BitIndex = 0; (Operand & 1) == 0; BitIndex++, Operand >>= 1);\r
+  for (BitIndex = 0; 0 == (Operand & 1); BitIndex++, Operand >>= 1);\r
   return BitIndex;\r
 }\r