MdePkg/BaseLib: Support IA32 processors without CMOVx

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / RShiftU64.c

diff --git a/MdePkg/Library/BaseLib/Ia32/RShiftU64.c b/MdePkg/Library/BaseLib/Ia32/RShiftU64.c
index 9f1b6cd25a9d0afa550bc496ea88f28ed8233c8d..8b494856356a5633a742389fd130980d3169f0ae 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/RShiftU64.c
+++ b/MdePkg/Library/BaseLib/Ia32/RShiftU64.c
@@ -1,11 +1,11 @@
 /** @file\r
   64-bit logical right shift function for IA-32\r
 \r
-  Copyright (c) 2006 - 2008, Intel Corporation<BR>\r
-  All rights reserved. This program and the accompanying materials\r
+  Copyright (c) 2006 - 2015, 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
@@ -40,8 +40,10 @@ InternalMathRShiftU64 (
     xor     edx, edx\r
     mov     eax, dword ptr [Operand + 4]\r
     test    cl, 32\r
-    cmovz   edx, eax\r
-    cmovz   eax, dword ptr [Operand + 0]\r
+    jnz     L0\r
+    mov     edx, eax\r
+    mov     eax, dword ptr [Operand + 0]\r
+L0:\r
     shrd    eax, edx, cl\r
     shr     edx, cl\r
   }\r