1 files changed, 50 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c b/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c
new file mode 100644
index 0000000000..3c3620ba60
--- /dev/null
+++ b/Core/MdePkg/Library/BaseLib/Ia32/DivU64x32.c
@@ -0,0 +1,50 @@
+/** @file
+  Calculate the quotient of a 64-bit integer by a 32-bit integer
+
+  Copyright (c) 2006 - 2010, 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.
+
+**/
+
+
+
+
+/**
+  Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
+  generates a 64-bit unsigned result.
+
+  This function divides the 64-bit unsigned value Dividend by the 32-bit
+  unsigned value Divisor and generates a 64-bit unsigned quotient. This
+  function returns the 64-bit unsigned quotient.
+
+  @param  Dividend  A 64-bit unsigned value.
+  @param  Divisor   A 32-bit unsigned value.
+
+  @return Dividend / Divisor
+
+**/
+UINT64
+EFIAPI
+InternalMathDivU64x32 (
+  IN      UINT64                    Dividend,
+  IN      UINT32                    Divisor
+  )
+{
+  _asm {
+    mov     eax, dword ptr [Dividend + 4]
+    mov     ecx, Divisor
+    xor     edx, edx
+    div     ecx
+    push    eax                     ; save quotient on stack
+    mov     eax, dword ptr [Dividend]
+    div     ecx
+    pop     edx                     ; restore high-order dword of the quotient
+  }
+}
+