Add in the 1st version of ECP.

[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EfiCommonLib / Ia32 / Power10U64.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation                                                         \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
Module Name:\r
\r
  Power10U64.c\r
\r
Abstract:\r
\r
  Calculates Operand * 10 ^ Power\r
\r
--*/\r
\r
#include "Tiano.h"\r
\r
UINT64\r
MultU64x32 (\r
  IN UINT64   Multiplicand,\r
  IN UINTN    Multiplier\r
  );\r
\r
UINT64\r
Power10U64 (\r
  IN UINT64   Operand,\r
  IN UINTN    Power\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Raise 10 to the power of Power, and multiply the result with Operand\r
\r
Arguments:\r
\r
  Operand  - multiplicand\r
  Power    - power\r
\r
Returns:\r
\r
  Operand * 10 ^ Power\r
\r
--*/\r
{\r
  __asm {\r
  mov    ecx, Power\r
  jcxz   _Power10U64_Done\r
  \r
_Power10U64_Wend:\r
  push   10\r
  push   dword ptr Operand[4]\r
  push   dword ptr Operand[0]\r
  call   MultU64x32\r
  mov    dword ptr Operand[0], eax\r
  mov    dword ptr Operand[4], edx\r
  loop   _Power10U64_Wend\r
\r
_Power10U64_Done:\r
  }\r
}\r