random.hh revision 1296 
1/*
2 * Copyright (c) 2003 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef __BASE_RANDOM_HH__
30#define __BASE_RANDOM_HH__
31
32#include "sim/host.hh"
33
34long getLong();
35double getDouble();
36
37template <typename T>
38struct Random;
39
40struct Random<int8_t>
41{
42    static int8_t get()
43    { return getLong() & (int8_t)-1; }
44};
45
46struct Random<uint8_t>
47{
48    static uint8_t get()
49    { return getLong() & (uint8_t)-1; }
50};
51
52struct Random<int16_t>
53{
54    static int16_t get()
55    { return getLong() & (int16_t)-1; }
56};
57
58struct Random<uint16_t>
59{
60    static uint16_t get()
61    { return getLong() & (uint16_t)-1; }
62};
63
64struct Random<int32_t>
65{
66    static int32_t get()
67    { return (int32_t)getLong(); }
68};
69
70struct Random<uint32_t>
71{
72    static uint32_t get()
73    { return (uint32_t)getLong(); }
74};
75
76struct Random<int64_t>
77{
78    static int64_t get()
79    { return (int64_t)getLong() << 32 || (uint64_t)getLong(); }
80};
81
82struct Random<uint64_t>
83{
84    static uint64_t get()
85    { return (uint64_t)getLong() << 32 || (uint64_t)getLong(); }
86};
87
88struct Random<float>
89{
90    static float get()
91    { return getDouble(); }
92};
93
94struct Random<double>
95{
96    static double get()
97    { return getDouble(); }
98};
99
100#endif // __BASE_RANDOM_HH__
101