1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
| ;------------------------------------------------------------------------------
| ;
| ; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
| ; SPDX-License-Identifier: BSD-2-Clause-Patent
| ;
| ; Module Name:
| ;
| ; RRotU64.nasm
| ;
| ; Abstract:
| ;
| ; 64-bit right rotation for Ia32
| ;
| ;------------------------------------------------------------------------------
|
| SECTION .text
|
| ;------------------------------------------------------------------------------
| ; UINT64
| ; EFIAPI
| ; InternalMathRRotU64 (
| ; IN UINT64 Operand,
| ; IN UINTN Count
| ; );
| ;------------------------------------------------------------------------------
| global ASM_PFX(InternalMathRRotU64)
| ASM_PFX(InternalMathRRotU64):
| push ebx
| mov cl, [esp + 16]
| mov eax, [esp + 8]
| mov edx, [esp + 12]
| shrd ebx, eax, cl
| shrd eax, edx, cl
| rol ebx, cl
| shrd edx, ebx, cl
| test cl, 32 ; Count >= 32?
| jz .0
| mov ecx, eax ; switch eax & edx if Count >= 32
| mov eax, edx
| mov edx, ecx
| .0:
| pop ebx
| ret
|
|
|
