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

[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / MultU64x32.c

diff --git a/OldMdePkg/Library/BaseLib/Ia32/MultU64x32.c b/OldMdePkg/Library/BaseLib/Ia32/MultU64x32.c
new file mode 100644 (file)
index 0000000..ea0643d
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/MultU64x32.c
@@ -0,0 +1,30 @@
+/** @file\r
+  Calculate the product of a 64-bit integer and a 32-bit integer\r
+\r
+  Copyright (c) 2006 - 2007, Intel Corporation<BR>\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
+**/\r
+\r
+UINT64\r
+EFIAPI\r
+InternalMathMultU64x32 (\r
+  IN      UINT64                    Multiplicand,\r
+  IN      UINT32                    Multiplier\r
+  )\r
+{\r
+  _asm {\r
+    mov     ecx, Multiplier\r
+    mov     eax, ecx\r
+    imul    ecx, dword ptr [Multiplicand + 4]  // overflow not detectable\r
+    mul     dword ptr [Multiplicand + 0]\r
+    add     edx, ecx\r
+  }\r
+}\r
+\r