|
sl@0
|
1 |
// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
sl@0
|
2 |
// All rights reserved.
|
|
sl@0
|
3 |
// This component and the accompanying materials are made available
|
|
sl@0
|
4 |
// under the terms of the License "Eclipse Public License v1.0"
|
|
sl@0
|
5 |
// which accompanies this distribution, and is available
|
|
sl@0
|
6 |
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
sl@0
|
7 |
//
|
|
sl@0
|
8 |
// Initial Contributors:
|
|
sl@0
|
9 |
// Nokia Corporation - initial contribution.
|
|
sl@0
|
10 |
//
|
|
sl@0
|
11 |
// Contributors:
|
|
sl@0
|
12 |
//
|
|
sl@0
|
13 |
// Description:
|
|
sl@0
|
14 |
// e32test\misc\prbs.h
|
|
sl@0
|
15 |
//
|
|
sl@0
|
16 |
//
|
|
sl@0
|
17 |
|
|
sl@0
|
18 |
#ifndef __PRBS_H__
|
|
sl@0
|
19 |
#define __PRBS_H__
|
|
sl@0
|
20 |
#include <e32cmn.h>
|
|
sl@0
|
21 |
|
|
sl@0
|
22 |
LOCAL_C TUint Random(TUint* aSeed)
|
|
sl@0
|
23 |
{
|
|
sl@0
|
24 |
TUint x = aSeed[0];
|
|
sl@0
|
25 |
TUint r3 = x >> 1;
|
|
sl@0
|
26 |
r3 |= (aSeed[1] << 31);
|
|
sl@0
|
27 |
aSeed[1] = x & 1;
|
|
sl@0
|
28 |
r3 ^= (x << 12);
|
|
sl@0
|
29 |
x = r3 ^ (r3 >> 20);
|
|
sl@0
|
30 |
aSeed[0] = x;
|
|
sl@0
|
31 |
return x;
|
|
sl@0
|
32 |
}
|
|
sl@0
|
33 |
|
|
sl@0
|
34 |
#endif
|