random.hh revision 1762
1/* 2 * Copyright (c) 2003-2005 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 40template<> struct Random<int8_t> 41{ 42 static int8_t get() 43 { return getLong() & (int8_t)-1; } 44}; 45 46template<> struct Random<uint8_t> 47{ 48 static uint8_t get() 49 { return getLong() & (uint8_t)-1; } 50}; 51 52template<> struct Random<int16_t> 53{ 54 static int16_t get() 55 { return getLong() & (int16_t)-1; } 56}; 57 58template<> struct Random<uint16_t> 59{ 60 static uint16_t get() 61 { return getLong() & (uint16_t)-1; } 62}; 63 64template<> struct Random<int32_t> 65{ 66 static int32_t get() 67 { return (int32_t)getLong(); } 68}; 69 70template<> struct Random<uint32_t> 71{ 72 static uint32_t get() 73 { return (uint32_t)getLong(); } 74}; 75 76template<> struct Random<int64_t> 77{ 78 static int64_t get() 79 { return (int64_t)getLong() << 32 || (uint64_t)getLong(); } 80}; 81 82template<> struct Random<uint64_t> 83{ 84 static uint64_t get() 85 { return (uint64_t)getLong() << 32 || (uint64_t)getLong(); } 86}; 87 88template<> struct Random<float> 89{ 90 static float get() 91 { return getDouble(); } 92}; 93 94template<> struct Random<double> 95{ 96 static double get() 97 { return getDouble(); } 98}; 99 100#endif // __BASE_RANDOM_HH__ 101