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-/*
- * Copyright (c) 2003-2005 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <cstdlib>
-#include <cmath>
-
-#include "sim/param.hh"
-#include "base/random.hh"
-#include "base/trace.hh"
-
-using namespace std;
-
-class RandomContext : public ParamContext
-{
- public:
- RandomContext(const string &_iniSection)
- : ::ParamContext(_iniSection) {}
- ~RandomContext() {}
-
- void checkParams();
-};
-
-RandomContext paramContext("random");
-
-Param<unsigned>
-seed(&paramContext, "seed", "seed to random number generator", 1);
-
-void
-RandomContext::checkParams()
-{
- ::srand48(seed);
-}
-
-long
-getLong()
-{
- return mrand48();
-}
-
-int64_t
-getUniform(int64_t min, int64_t max)
-{
- double r;
- r = drand48() * (max-min) + min;
- return (int64_t)round(r);
-}
-
-uint64_t
-getUniformPos(uint64_t min, uint64_t max)
-{
- double r;
- r = drand48() * (max-min) + min;
- return (uint64_t)round(r);
-}
-
-
-// idea for generating a double from erand48
-double
-getDouble()
-{
- union {
- uint32_t _long[2];
- uint16_t _short[4];
- };
-
- _long[0] = mrand48();
- _long[1] = mrand48();
-
- return ldexp((double) _short[0], -48) +
- ldexp((double) _short[1], -32) +
- ldexp((double) _short[2], -16);
-}