Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / InterlockedCompareExchange32.S

diff --git a/OldMdePkg/Library/BaseLib/Ia32/InterlockedCompareExchange32.S b/OldMdePkg/Library/BaseLib/Ia32/InterlockedCompareExchange32.S
new file mode 100644 (file)
index 0000000..a0a6ad9
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/InterlockedCompareExchange32.S
@@ -0,0 +1,41 @@
+#------------------------------------------------------------------------------\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
+#   InternalSyncCompareExchange32 function\r
+#\r
+# Notes:\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+.globl ASM_PFX(InternalSyncCompareExchange32)\r
+\r
+#------------------------------------------------------------------------------\r
+# UINT32\r
+# EFIAPI\r
+# InternalSyncCompareExchange32 (\r
+#   IN      UINT32                    *Value,\r
+#   IN      UINT32                    CompareValue,\r
+#   IN      UINT32                    ExchangeValue\r
+#   );\r
+#------------------------------------------------------------------------------\r
+ASM_PFX(InternalSyncCompareExchange32):\r
+    movl    4(%esp), %ecx\r
+    movl    8(%esp), %eax\r
+    movl    12(%esp), %edx\r
+    lock\r
+    cmpxchgl    %edx, (%ecx)\r
+    ret\r