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

   1 #/*++
   2 #
   3 #Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 #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 #include "EfiBind.h"
  24 #---------------------------------------------------------------------------
  25     .686:
  26     #.MODEL flat,C
  27     .code:
  28
  29 .globl ASM_PFX(DivU64x32)
  30 #---------------------------------------------------------------------------
  31 #
  32 #UINT64
  33 #MultU64x32 (
  34 #  IN UINT64   Multiplicand,
  35 #  IN UINTN    Multiplier
  36 #  );
  37 #
  38 #UINT64
  39 #Power10U64 (
  40 #  IN UINT64   Operand,
  41 #  IN UINTN    Power
  42 #  )
  43 #/*++
  44 #
  45 #Routine Description:
  46 #
  47 #  Raise 10 to the power of Power, and multiply the result with Operand
  48 #
  49 #Arguments:
  50 #
  51 #  Operand  - multiplicand
  52 #  Power    - power
  53 #
  54 #Returns:
  55 #
  56 #  Operand * 10 ^ Power
  57 #
  58 #--*/
  59 ASM_PFX(Power10U64):
  60   pushl  %ebp
  61   movl   %esp, %ebp
  62   movl   8(%ebp), %eax           # dword ptr Operand[0]
  63   movl   0xC(%ebp), %edx           # dword ptr Operand[4]
  64   movl   0x10(%ebp), %ecx           #Power
  65   jcxz   _Power10U64_Done
  66
  67 _Power10U64_Wend:
  68   pushl  $10
  69   push   0xC(%ebp)
  70   push   0x8(%ebp)
  71   call   ASM_PFX(MultU64x32)
  72   addl   $0xc, %esp
  73   movl   %eax, 8(%ebp)  # dword ptr Operand[0]
  74   movl   %edx, 0xC(%ebp)  # dword ptr Operand[4]
  75   loopl  _Power10U64_Wend
  76
  77 _Power10U64_Done:
  78
  79   popl   %ebp
  80   ret
  81 #Power10U64 ENDP
  82