1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
4; This program and the accompanying materials
5; are licensed and made available under the terms and conditions of the BSD License
6; which accompanies this distribution.  The full text of the license may be found at
7; http://opensource.org/licenses/bsd-license.php.
8;
9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11;
12; Module Name:
13;
14;   RShiftU64.asm
15;
16; Abstract:
17;
18;   64-bit logical right shift function for IA-32
19;
20;------------------------------------------------------------------------------
21
22    .686
23    .model  flat,C
24    .code
25
26;------------------------------------------------------------------------------
27; UINT64
28; EFIAPI
29; InternalMathRShiftU64 (
30;   IN      UINT64                    Operand,
31;   IN      UINTN                     Count
32;   );
33;------------------------------------------------------------------------------
34InternalMathRShiftU64   PROC
35    mov     cl, [esp + 12]              ; cl <- Count
36    xor     edx, edx
37    mov     eax, [esp + 8]
38    test    cl, 32                      ; Count >= 32?
39    jnz     @F
40    mov     edx, eax
41    mov     eax, [esp + 4]
42@@:
43    shrd    eax, edx, cl
44    shr     edx, cl
45    ret
46InternalMathRShiftU64   ENDP
47
48    END
49