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1 | /** @file\r |
2 | Calculate the product of a 64-bit integer and another 64-bit integer\r |
3 | \r |
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4 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
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5 | This program and the accompanying materials\r |
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6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
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8 | http://opensource.org/licenses/bsd-license.php.\r |
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9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
12 | \r |
13 | **/\r |
14 | \r |
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15 | \r |
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16 | \r |
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17 | \r |
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18 | /**\r |
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19 | Multiplies a 64-bit unsigned integer by a 64-bit unsigned integer\r |
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20 | and generates a 64-bit unsigned result.\r |
21 | \r |
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22 | This function multiplies the 64-bit unsigned value Multiplicand by the 64-bit\r |
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23 | unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r |
24 | bit unsigned result is returned.\r |
25 | \r |
26 | @param Multiplicand A 64-bit unsigned value.\r |
27 | @param Multiplier A 64-bit unsigned value.\r |
28 | \r |
29 | @return Multiplicand * Multiplier\r |
30 | \r |
31 | **/\r |
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32 | UINT64\r |
33 | EFIAPI\r |
34 | InternalMathMultU64x64 (\r |
35 | IN UINT64 Multiplicand,\r |
36 | IN UINT64 Multiplier\r |
37 | )\r |
38 | {\r |
39 | _asm {\r |
40 | mov ebx, dword ptr [Multiplicand + 0]\r |
41 | mov edx, dword ptr [Multiplier + 0]\r |
42 | mov ecx, ebx\r |
43 | mov eax, edx\r |
44 | imul ebx, dword ptr [Multiplier + 4]\r |
45 | imul edx, dword ptr [Multiplicand + 4]\r |
46 | add ebx, edx\r |
47 | mul ecx\r |
48 | add edx, ebx\r |
49 | }\r |
50 | }\r |
51 | \r |