MdePkg/Library/BaseLib/Ia32/MultU64x64.s

   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 #   MultU64x64.asm
  15 #
  16 # Abstract:
  17 #
  18 #   Calculate the product of a 64-bit integer and another 64-bit integer
  19 #
  20 #------------------------------------------------------------------------------
  21
  22
  23
  24
  25
  26 .global _MultS64x64
  27 _MultS64x64:
  28     #
  29     # MultS64x32 shares the same implementation with _MultU64x32, and thus no
  30     # code inside this function.
  31     #
  32
  33
  34 .global _MultU64x64
  35     push    %ebx
  36     movl    8(%esp),%ebx
  37     movl    16(%esp),%edx
  38     movl    %ebx,%ecx
  39     movl    %edx,%eax
  40     imull   20(%esp),%ebx
  41     imull   12(%esp),%edx
  42     addl    %edx,%ebx
  43     mull    %ecx
  44     addl    %ebx,%edx
  45     pop     %ebx
  46     ret
  47
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  49