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e1f414b6 | 1 | /** @file\r |
2 | Implementation of 64-bit swap bytes\r | |
3 | \r | |
373ade0e | 4 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r |
e1f414b6 | 5 | All rights reserved. This program and the accompanying materials\r |
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 | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
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 | |
1efcc4ae | 15 | \r |
f734a10a | 16 | \r |
e1f414b6 | 17 | \r |
42eedea9 | 18 | /**\r |
19 | Switches the endianess of a 64-bit integer.\r | |
20 | \r | |
21 | This function swaps the bytes in a 64-bit unsigned value to switch the value\r | |
22 | from little endian to big endian or vice versa. The byte swapped value is\r | |
23 | returned.\r | |
24 | \r | |
25 | @param Operand A 64-bit unsigned value.\r | |
26 | \r | |
27 | @return The byte swaped Operand.\r | |
28 | \r | |
29 | **/\r | |
e1f414b6 | 30 | UINT64\r |
31 | EFIAPI\r | |
32 | InternalMathSwapBytes64 (\r | |
33 | IN UINT64 Operand\r | |
34 | )\r | |
35 | {\r | |
36 | _asm {\r | |
37 | mov eax, dword ptr [Operand + 4]\r | |
38 | mov edx, dword ptr [Operand + 0]\r | |
39 | bswap eax\r | |
40 | bswap edx\r | |
41 | }\r | |
42 | }\r | |
43 | \r |