1 files changed, 44 insertions, 0 deletions
diff --git a/OldMdePkg/Library/BaseLib/Ia32/MultU64x64.S b/OldMdePkg/Library/BaseLib/Ia32/MultU64x64.S
new file mode 100644
index 0000000000..03523865f6
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/MultU64x64.S
@@ -0,0 +1,44 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution.  The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+#   MultU64x64.asm
+#
+# Abstract:
+#
+#   Calculate the product of a 64-bit integer and another 64-bit integer
+#
+#------------------------------------------------------------------------------
+
+.globl ASM_PFX(InternalMathMultU64x64)
+
+#------------------------------------------------------------------------------
+# UINT64
+# EFIAPI
+# InternalMathMultU64x64 (
+#   IN      UINT64                    Multiplicand,
+#   IN      UINT64                    Multiplier
+#   );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalMathMultU64x64):
+    push    %ebx
+    movl    8(%esp), %ebx
+    movl    16(%esp), %edx
+    movl    %ebx, %ecx
+    movl    %edx, %eax
+    imull   20(%esp), %ebx
+    imull   12(%esp), %edx
+    addl    %edx, %ebx
+    mull    %ecx
+    addl    %ebx, %edx
+    pop     %ebx
+    ret