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1 | /** @file\r | |
2 | 64-bit arithmetic right shift function for IA-32.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r | |
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 | |
15 | UINT64\r | |
16 | EFIAPI\r | |
17 | InternalMathARShiftU64 (\r | |
18 | IN UINT64 Operand,\r | |
19 | IN UINTN Count\r | |
20 | )\r | |
21 | {\r | |
22 | _asm {\r | |
23 | mov cl, byte ptr [Count]\r | |
24 | mov eax, dword ptr [Operand + 4]\r | |
25 | cdq\r | |
26 | test cl, 32\r | |
27 | cmovz edx, eax\r | |
28 | cmovz eax, dword ptr [Operand + 0]\r | |
29 | shrd eax, edx, cl\r | |
30 | sar edx, cl\r | |
31 | }\r | |
32 | }\r | |
33 | \r |