--- /dev/null
+#------------------------------------------------------------------------------\r
+#\r
+# Copyright (c) 2006, Intel Corporation\r
+# All rights reserved. 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
+#\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
+# InterlockedCompareExchange32.Asm\r
+#\r
+# Abstract:\r
+#\r
+# InterlockedCompareExchange32 function\r
+#\r
+# Notes:\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+\r
+\r
+ \r
+\r
+#------------------------------------------------------------------------------\r
+# VOID *\r
+# EFIAPI\r
+# InterlockedCompareExchangePointer (\r
+# IN VOID **Value,\r
+# IN VOID *CompareValue,\r
+# IN VOID *ExchangeValue\r
+# );\r
+#------------------------------------------------------------------------------\r
+.global _InterlockedCompareExchangePointer\r
+_InterlockedCompareExchangePointer: \r
+ #\r
+ # InterlockedCompareExchangePointer() shares the same code as\r
+ # InterlockedCompareExchange32() on IA32 and thus no code inside this\r
+ # function\r
+ #\r
+\r
+\r
+#------------------------------------------------------------------------------\r
+# UINT32\r
+# EFIAPI\r
+# InterlockedCompareExchange32 (\r
+# IN UINT32 *Value,\r
+# IN UINT32 CompareValue,\r
+# IN UINT32 ExchangeValue\r
+# );\r
+#------------------------------------------------------------------------------\r
+.global _InterlockedCompareExchange32\r
+_InterlockedCompareExchange32: \r
+ movl 4(%esp),%ecx\r
+ movl 8(%esp),%eax\r
+ movl 12(%esp),%edx\r
+ lock cmpxchgl %edx,(%ecx)\r
+ ret\r
+\r
+\r
+\r