07ef1170e0
base/random.cc:
Change normal random function to Xrand48 so we have one source of
randomness for everything.
base/random.hh:
Add uniform distribution ability to random functions
dev/etherlink.cc:
dev/etherlink.hh:
Add ability to slightly perturb latency of ethernet
--HG--
extra : convert_revision : f7f856761fd525c233ae2a6d993b1fd702b488f7
126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BASE_RANDOM_HH__
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#define __BASE_RANDOM_HH__
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#include "sim/host.hh"
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long getLong();
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double getDouble();
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uint64_t getUniformPos(uint64_t max);
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int64_t getUniform(int64_t max);
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template <typename T>
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struct Random;
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template<> struct Random<int8_t>
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{
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static int8_t get()
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{ return getLong() & (int8_t)-1; }
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static int8_t uniform(int8_t maxmin)
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{ return getUniform(maxmin); }
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};
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template<> struct Random<uint8_t>
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{
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static uint8_t get()
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{ return getLong() & (uint8_t)-1; }
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static uint8_t uniform(uint8_t max)
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{ return getUniformPos(max); }
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};
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template<> struct Random<int16_t>
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{
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static int16_t get()
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{ return getLong() & (int16_t)-1; }
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static int16_t uniform(int16_t maxmin)
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{ return getUniform(maxmin); }
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};
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template<> struct Random<uint16_t>
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{
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static uint16_t get()
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{ return getLong() & (uint16_t)-1; }
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static uint16_t uniform(uint16_t max)
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{ return getUniformPos(max); }
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};
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template<> struct Random<int32_t>
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{
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static int32_t get()
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{ return (int32_t)getLong(); }
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static int32_t uniform(int32_t maxmin)
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{ return getUniform(maxmin); }
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};
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template<> struct Random<uint32_t>
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{
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static uint32_t get()
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{ return (uint32_t)getLong(); }
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static uint32_t uniform(uint32_t max)
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{ return getUniformPos(max); }
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};
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template<> struct Random<int64_t>
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{
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static int64_t get()
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{ return (int64_t)getLong() << 32 || (uint64_t)getLong(); }
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static int64_t uniform(int64_t maxmin)
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{ return getUniform(maxmin); }
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};
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template<> struct Random<uint64_t>
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{
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static uint64_t get()
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{ return (uint64_t)getLong() << 32 || (uint64_t)getLong(); }
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static uint64_t uniform(uint64_t max)
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{ return getUniformPos(max); }
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};
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template<> struct Random<float>
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{
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static float get()
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{ return getDouble(); }
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};
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template<> struct Random<double>
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{
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static double get()
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{ return getDouble(); }
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};
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#endif // __BASE_RANDOM_HH__
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