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3eb9473e 1/*++\r
2\r
2c7e5c2f
HT
3Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>\r
4This program and the accompanying materials \r
3eb9473e 5are licensed and made available under the terms and conditions of the BSD License \r
6which accompanies this distribution. The full text of the license may be found at \r
7http://opensource.org/licenses/bsd-license.php \r
8 \r
9THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
10WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
11\r
12\r
13Module Name:\r
14\r
c7f33ca4 15 RShiftU64.c\r
3eb9473e 16 \r
17Abstract: \r
18\r
c7f33ca4 19 \r
3eb9473e 20\r
21--*/\r
22\r
c7f33ca4 23#include "BaseLibInternals.h"\r
3eb9473e 24\r
c7f33ca4 25UINT64\r
3eb9473e 26EFIAPI\r
c7f33ca4 27InternalMathRShiftU64 (\r
28 IN UINT64 Operand,\r
29 IN UINTN Count\r
3eb9473e 30 )\r
31{\r
c7f33ca4 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
3eb9473e 41 }\r
3eb9473e 42}\r
c7f33ca4 43\r