63a8240059
We don't currently use randomness much, so I didn't go too far, but in the future, we may want to actually expose the random number values themselves to python. For now, I'll at least let you seed it. While we're at it, clean up a clearly bad way for generating random doubles. --HG-- extra : convert_revision : df2aa8b58dd0d9c2a7c771668a760b2df8db1e11
89 lines
2.4 KiB
C++
89 lines
2.4 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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* Authors: Nathan Binkert
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* Ali Saidi
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*/
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#if defined(__sun)
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#include <ieeefp.h>
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#endif
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#ifdef __SUNPRO_CC
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#include <stdlib.h>
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#include <math.h>
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#endif
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#include <cstdlib>
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#include <cmath>
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#include "base/random.hh"
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using namespace std;
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uint32_t
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getInt32()
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{
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return mrand48() & 0xffffffff;
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}
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double
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getDouble()
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{
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return drand48();
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}
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double
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m5round(double r)
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{
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#if defined(__sun)
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double val;
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fp_rnd oldrnd = fpsetround(FP_RN);
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val = rint(r);
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fpsetround(oldrnd);
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return val;
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#else
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return round(r);
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#endif
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}
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int64_t
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getUniform(int64_t min, int64_t max)
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{
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double r;
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r = drand48() * (max-min) + min;
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return (int64_t)m5round(r);
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}
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uint64_t
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getUniformPos(uint64_t min, uint64_t max)
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{
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double r;
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r = drand48() * (max-min) + min;
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return (uint64_t)m5round(r);
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}
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