random.cc revision 4045
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#if defined(__sun) 333918Ssaidi@eecs.umich.edu#include <ieeefp.h> 343918Ssaidi@eecs.umich.edu#endif 353918Ssaidi@eecs.umich.edu#ifdef __SUNPRO_CC 363918Ssaidi@eecs.umich.edu#include <stdlib.h> 373918Ssaidi@eecs.umich.edu#include <math.h> 383918Ssaidi@eecs.umich.edu#endif 393918Ssaidi@eecs.umich.edu 402SN/A#include <cstdlib> 412SN/A#include <cmath> 422SN/A 4356SN/A#include "base/random.hh" 442SN/A 452SN/Ausing namespace std; 462SN/A 474045Sbinkertn@umich.eduuint32_t 484045Sbinkertn@umich.edugetInt32() 492SN/A{ 504045Sbinkertn@umich.edu return mrand48() & 0xffffffff; 512SN/A} 522SN/A 534045Sbinkertn@umich.edudouble 544045Sbinkertn@umich.edugetDouble() 552SN/A{ 564045Sbinkertn@umich.edu return drand48(); 572SN/A} 582SN/A 593483Ssaidi@eecs.umich.edudouble 603483Ssaidi@eecs.umich.edum5round(double r) 613483Ssaidi@eecs.umich.edu{ 623918Ssaidi@eecs.umich.edu#if defined(__sun) 633483Ssaidi@eecs.umich.edu double val; 643483Ssaidi@eecs.umich.edu fp_rnd oldrnd = fpsetround(FP_RN); 653483Ssaidi@eecs.umich.edu val = rint(r); 663483Ssaidi@eecs.umich.edu fpsetround(oldrnd); 673483Ssaidi@eecs.umich.edu return val; 683483Ssaidi@eecs.umich.edu#else 693483Ssaidi@eecs.umich.edu return round(r); 703483Ssaidi@eecs.umich.edu#endif 713483Ssaidi@eecs.umich.edu} 723483Ssaidi@eecs.umich.edu 731954SN/Aint64_t 741971SN/AgetUniform(int64_t min, int64_t max) 751954SN/A{ 761954SN/A double r; 771971SN/A r = drand48() * (max-min) + min; 783483Ssaidi@eecs.umich.edu 793483Ssaidi@eecs.umich.edu return (int64_t)m5round(r); 801954SN/A} 811954SN/A 821954SN/Auint64_t 831971SN/AgetUniformPos(uint64_t min, uint64_t max) 841954SN/A{ 851954SN/A double r; 861971SN/A r = drand48() * (max-min) + min; 873483Ssaidi@eecs.umich.edu 883483Ssaidi@eecs.umich.edu return (uint64_t)m5round(r); 891954SN/A} 90