MdePkg/BaseLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LRotU64.S

diff --git a/MdePkg/Library/BaseLib/Ia32/LRotU64.S b/MdePkg/Library/BaseLib/Ia32/LRotU64.S
index fe3ab60af6f707f90e120a3bf77c937445156f37..e9aeeb6387d821fc878f4bae88ef251a74f69e7e 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/LRotU64.S
+++ b/MdePkg/Library/BaseLib/Ia32/LRotU64.S
@@ -1,22 +1,17 @@
-//\r
-// Include common header file for this module.\r
-//\r
-#include "CommonHeader.h"\r
-\r
 #------------------------------------------------------------------------------\r
 #\r
-# Copyright (c) 2006, Intel Corporation\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
 # Module Name:\r
 #\r
-#   LRotU64.asm\r
+#   LRotU64.S\r
 #\r
 # Abstract:\r
 #\r
@@ -24,7 +19,7 @@
 #\r
 #------------------------------------------------------------------------------\r
 \r
-.globl ASM_PFX(InternalMathLRotU64)\r
+ASM_GLOBAL ASM_PFX(InternalMathLRotU64)\r
 \r
 #------------------------------------------------------------------------------\r
 # UINT64\r
@@ -43,7 +38,7 @@ ASM_PFX(InternalMathLRotU64):
     shldl   %cl, %eax, %edx\r
     rorl    %cl, %ebx\r
     shldl   %cl, %ebx, %eax\r
-    testb   $32, %cl\r
+    testb   $32, %cl                    # Count >= 32?\r
     cmovnz  %eax, %ecx\r
     cmovnz  %edx, %eax\r
     cmovnz  %ecx, %edx\r