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e1f414b6 | 1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
bb817c56 HT |
3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r |
4 | ; This program and the accompanying materials\r | |
e1f414b6 | 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 | |
e4a34497 | 7 | ; http://opensource.org/licenses/bsd-license.php.\r |
e1f414b6 | 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 | ; Module Name:\r | |
13 | ;\r | |
14 | ; RShiftU64.asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; 64-bit logical right shift function for IA-32\r | |
19 | ;\r | |
20 | ;------------------------------------------------------------------------------\r | |
21 | \r | |
22 | .686\r | |
23 | .model flat,C\r | |
24 | .code\r | |
25 | \r | |
26 | ;------------------------------------------------------------------------------\r | |
27 | ; UINT64\r | |
28 | ; EFIAPI\r | |
29 | ; InternalMathRShiftU64 (\r | |
30 | ; IN UINT64 Operand,\r | |
31 | ; IN UINTN Count\r | |
32 | ; );\r | |
33 | ;------------------------------------------------------------------------------\r | |
34 | InternalMathRShiftU64 PROC\r | |
35 | mov cl, [esp + 12] ; cl <- Count\r | |
36 | xor edx, edx\r | |
37 | mov eax, [esp + 8]\r | |
38 | test cl, 32 ; Count >= 32?\r | |
39 | cmovz edx, eax\r | |
40 | cmovz eax, [esp + 4]\r | |
41 | shrd eax, edx, cl\r | |
42 | shr edx, cl\r | |
43 | ret\r | |
44 | InternalMathRShiftU64 ENDP\r | |
45 | \r | |
46 | END\r |