Update the copyright notice format

[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EfiCommonLib / Ia32 / MultU64x32.c

/*++\r
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Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
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
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Module Name:\r
\r
   MultU64x32.c\r
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Abstract:\r
\r
  64-bit Multiplication function for IA-32\r
\r
--*/\r
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#include "Tiano.h"\r
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UINT64\r
MultU64x32 (\r
  IN UINT64   Multiplicand,\r
  IN UINTN    Multiplier\r
  )\r
/*++\r
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Routine Description:\r
\r
  This routine allows a 64 bit value to be multiplied with a 32 bit \r
  value returns 64bit result.\r
  No checking if the result is greater than 64bits\r
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Arguments:\r
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  Multiplicand  - multiplicand\r
  Multiplier    - multiplier\r
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Returns:\r
\r
  Multiplicand * Multiplier\r
\r
--*/\r
{\r
  __asm {\r
    mov    eax, dword ptr Multiplicand[0]\r
    mul    Multiplier\r
    push   eax\r
    push   edx\r
    mov    eax, dword ptr Multiplicand[4]\r
    mul    Multiplier\r
    ;\r
    ; The value in edx stored by second multiplication overflows\r
    ; the output and should be discarded. So here we overwrite it\r
    ; with the edx value of first multiplication.\r
    ;\r
    pop    edx\r
    add    edx, eax\r
    pop    eax\r
  }\r
}\r