EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/Power10U64.asm

   1 ;/*++
   2 ;
   3 ;Copyright (c) 2006, Intel Corporation
   4 ;All rights reserved. This program and the accompanying materials
   5 ;are licensed and made available under the terms and conditions of the BSD License
   6 ;which accompanies this distribution.  The full text of the license may be found at
   7 ;http://opensource.org/licenses/bsd-license.php
   8 ;
   9 ;THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ;WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ;Module Name:
  13 ;
  14 ;  Power10U64.c
  15 ;
  16 ;Abstract:
  17 ;
  18 ;  Calculates Operand * 10 ^ Power
  19 ;
  20 ;--*/
  21 ;
  22 ;#include "Tiano.h"
  23 ;---------------------------------------------------------------------------
  24     .686
  25     .model  flat,C
  26     .code
  27
  28 MultU64x32    PROTO   C
  29 ;---------------------------------------------------------------------------
  30 ;
  31 ;UINT64
  32 ;MultU64x32 (
  33 ;  IN UINT64   Multiplicand,
  34 ;  IN UINTN    Multiplier
  35 ;  );
  36 ;
  37 ;UINT64
  38 ;Power10U64 (
  39 ;  IN UINT64   Operand,
  40 ;  IN UINTN    Power
  41 ;  )
  42 ;/*++
  43 ;
  44 ;Routine Description:
  45 ;
  46 ;  Raise 10 to the power of Power, and multiply the result with Operand
  47 ;
  48 ;Arguments:
  49 ;
  50 ;  Operand  - multiplicand
  51 ;  Power    - power
  52 ;
  53 ;Returns:
  54 ;
  55 ;  Operand * 10 ^ Power
  56 ;
  57 ;--*/
  58 Power10U64 PROC
  59   push   ebp
  60   mov    ebp, esp
  61   mov    eax, dword ptr [ebp + 8]; dword ptr Operand[0]
  62   mov    edx, dword ptr [ebp + 0Ch]; dword ptr Operand[4]
  63   mov    ecx, dword ptr [ebp + 10h] ;Power
  64   jcxz   _Power10U64_Done
  65
  66 _Power10U64_Wend:
  67   push   10
  68   push   [ebp + 0Ch]; dword ptr Operand[4]
  69   push   [ebp + 8]; dword ptr Operand[0]
  70   call   MultU64x32
  71   add    esp, 0cH
  72   mov    [ebp + 8] , eax; dword ptr Operand[0]
  73   mov    [ebp + 0Ch] , edx; dword ptr Operand[4]
  74   loop   _Power10U64_Wend
  75
  76 _Power10U64_Done:
  77
  78   pop    ebp
  79   ret
  80 Power10U64 ENDP
  81         END