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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>\r | |
4 | This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | RShiftU64.c\r | |
16 | \r | |
17 | Abstract: \r | |
18 | \r | |
19 | \r | |
20 | \r | |
21 | --*/\r | |
22 | \r | |
23 | #include "BaseLibInternals.h"\r | |
24 | \r | |
25 | UINT64\r | |
26 | EFIAPI\r | |
27 | InternalMathRShiftU64 (\r | |
28 | IN UINT64 Operand,\r | |
29 | IN UINTN Count\r | |
30 | )\r | |
31 | {\r | |
32 | _asm {\r | |
33 | mov cl, byte ptr [Count]\r | |
34 | xor edx, edx\r | |
35 | mov eax, dword ptr [Operand + 4]\r | |
36 | test cl, 32\r | |
37 | cmovz edx, eax\r | |
38 | cmovz eax, dword ptr [Operand + 0]\r | |
39 | shrd eax, edx, cl\r | |
40 | shr edx, cl\r | |
41 | }\r | |
42 | }\r | |
43 | \r |