random.cc revision 4395
12SN/A/* 21762SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 292665Ssaidi@eecs.umich.edu * Ali Saidi 302SN/A */ 312SN/A 323918Ssaidi@eecs.umich.edu#ifdef __SUNPRO_CC 333918Ssaidi@eecs.umich.edu#include <stdlib.h> 343918Ssaidi@eecs.umich.edu#include <math.h> 353918Ssaidi@eecs.umich.edu#endif 363918Ssaidi@eecs.umich.edu 372SN/A#include <cstdlib> 382SN/A#include <cmath> 392SN/A 404395Ssaidi@eecs.umich.edu#include "base/fenv.hh" 4156SN/A#include "base/random.hh" 422SN/A 432SN/Ausing namespace std; 442SN/A 454045Sbinkertn@umich.eduuint32_t 464045Sbinkertn@umich.edugetInt32() 472SN/A{ 484045Sbinkertn@umich.edu return mrand48() & 0xffffffff; 492SN/A} 502SN/A 514045Sbinkertn@umich.edudouble 524045Sbinkertn@umich.edugetDouble() 532SN/A{ 544045Sbinkertn@umich.edu return drand48(); 552SN/A} 562SN/A 573483Ssaidi@eecs.umich.edudouble 583483Ssaidi@eecs.umich.edum5round(double r) 593483Ssaidi@eecs.umich.edu{ 603918Ssaidi@eecs.umich.edu#if defined(__sun) 613483Ssaidi@eecs.umich.edu double val; 624394Ssaidi@eecs.umich.edu int oldrnd = m5_fegetround(); 634395Ssaidi@eecs.umich.edu m5_fesetround(M5_FE_TONEAREST); 643483Ssaidi@eecs.umich.edu val = rint(r); 654394Ssaidi@eecs.umich.edu m5_fesetround(oldrnd); 663483Ssaidi@eecs.umich.edu return val; 673483Ssaidi@eecs.umich.edu#else 683483Ssaidi@eecs.umich.edu return round(r); 693483Ssaidi@eecs.umich.edu#endif 703483Ssaidi@eecs.umich.edu} 713483Ssaidi@eecs.umich.edu 721954SN/Aint64_t 731971SN/AgetUniform(int64_t min, int64_t max) 741954SN/A{ 751954SN/A double r; 761971SN/A r = drand48() * (max-min) + min; 773483Ssaidi@eecs.umich.edu 783483Ssaidi@eecs.umich.edu return (int64_t)m5round(r); 791954SN/A} 801954SN/A 811954SN/Auint64_t 821971SN/AgetUniformPos(uint64_t min, uint64_t max) 831954SN/A{ 841954SN/A double r; 851971SN/A r = drand48() * (max-min) + min; 863483Ssaidi@eecs.umich.edu 873483Ssaidi@eecs.umich.edu return (uint64_t)m5round(r); 881954SN/A} 89