1 files changed, 40 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/MultU64x32.nasm b/MdePkg/Library/BaseLib/Ia32/MultU64x32.nasm
new file mode 100644
index 000000000000..d4c9e512e06b
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/MultU64x32.nasm
@@ -0,0 +1,40 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; 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:
+;
+;   MultU64x32.nasm
+;
+; Abstract:
+;
+;   Calculate the product of a 64-bit integer and a 32-bit integer
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathMultU64x32 (
+;   IN      UINT64                    Multiplicand,
+;   IN      UINT32                    Multiplier
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMathMultU64x32)
+ASM_PFX(InternalMathMultU64x32):
+    mov     ecx, [esp + 12]
+    mov     eax, ecx
+    imul    ecx, [esp + 8]              ; overflow not detectable
+    mul     dword [esp + 4]
+    add     edx, ecx
+    ret
+