StdLib/LibC/CRT/Ia32/mulll.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
   4 # This program and the accompanying materials are licensed and made available
   5 # under the terms and conditions of the BSD License which accompanies this
   6 # 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 #   MathMultS64x64.S
  15 #
  16 # Abstract:
  17 #
  18 #   64-bit Math Worker Function.
  19 #   Multiplies a 64-bit signed or unsigned value by a 64-bit signed or unsigned value
  20 #   and returns a 64-bit result
  21 #
  22 #------------------------------------------------------------------------------
  23
  24     .686:
  25     .code:
  26
  27 ASM_GLOBAL ASM_PFX(_mulll), ASM_PFX(MultS64x64)
  28
  29 #------------------------------------------------------------------------------
  30 #
  31 # void __cdecl __mulll (void)
  32 #
  33 #------------------------------------------------------------------------------
  34 ASM_PFX(__mulll):
  35     # Original local stack when calling __mulll
  36     #               -----------------
  37     #               |               |
  38     #               |---------------|
  39     #               |               |
  40     #               |--Multiplier --|
  41     #               |               |
  42     #               |---------------|
  43     #               |               |
  44     #               |--Multiplicand-|
  45     #               |               |
  46     #               |---------------|
  47     #               |  ReturnAddr** |
  48     #       ESP---->|---------------|
  49     #
  50
  51     #
  52     # Set up the local stack for Multiplicand parameter
  53     #
  54     movl    16(%esp), %eax
  55     push    %eax
  56     movl    16(%esp), %eax
  57     push    %eax
  58
  59     #
  60     # Set up the local stack for Multiplier parameter
  61     #
  62     movl    16(%esp), %eax
  63     push    %eax
  64     movl    16(%esp), %eax
  65     push    %eax
  66
  67     #
  68     # Call native MulS64x64 of BaseLib
  69     #
  70     jmp     ASM_PFX(MultS64x64)
  71
  72     #
  73     # Adjust stack
  74     #
  75     add     $16, %esp
  76
  77     ret     $16