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Diffstat (limited to 'src/fftw/timer.c')
| -rw-r--r-- | src/fftw/timer.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/fftw/timer.c b/src/fftw/timer.c new file mode 100644 index 0000000..a7d05a4 --- /dev/null +++ b/src/fftw/timer.c @@ -0,0 +1,164 @@ + +/* + * Copyright (c) 1997-1999, 2003 Massachusetts Institute of Technology + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* + * timer.c -- this file measures the execution time of + * ffts. This information is used by the planner. + */ + +/* $Id: timer.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ */ + +#include <time.h> +#include "fftw-int.h" +#include <math.h> +#include <stdlib.h> + +/********************* System-specific Timing Support *********************/ + +#if defined(HAVE_MAC_TIMER) && !defined(HAVE_MAC_PCI_TIMER) + +/* Use Macintosh Time Manager to get the time: */ + +/* + * make sure compiler (CW) recognizes the pascal keywords that are in + * Timer.h + */ +#pragma only_std_keywords off + +#include <Timer.h> + +#pragma only_std_keywords reset + +fftw_time get_Mac_microseconds(void) +{ + fftw_time t; + UnsignedWide microsec; /* + * microsec.lo and microsec.hi are + * unsigned long's, and are the two parts + * of a 64 bit unsigned integer + */ + + Microseconds(µsec); /* get time in microseconds */ + + /* store lo and hi words into our structure: */ + t.lo = microsec.lo; + t.hi = microsec.hi; + + return t; +} + +fftw_time fftw_time_diff(fftw_time t1, fftw_time t2) +/* + * This function takes the difference t1 - t2 of two 64 bit + * integers, represented by the 32 bit lo and hi words. + * if t1 < t2, returns 0. + */ +{ + fftw_time diff; + + if (t1.hi < t2.hi) { /* something is wrong...t1 < t2! */ + diff.hi = diff.lo = 0; + return diff; + } else + diff.hi = t1.hi - t2.hi; + + if (t1.lo < t2.lo) { + if (diff.hi > 0) + diff.hi -= 1; /* carry */ + else { /* something is wrong...t1 < t2! */ + diff.hi = diff.lo = 0; + return diff; + } + } + diff.lo = t1.lo - t2.lo; + + return diff; +} + +#endif + +#ifdef HAVE_WIN32_TIMER +#include <windows.h> + +static LARGE_INTEGER gFreq; +static int gHaveHiResTimer = 0; +static int gFirstTime = 1; + +unsigned long GetPerfTime(void) +{ + LARGE_INTEGER lCounter; + + if (gFirstTime) { + gFirstTime = 0; + + if (QueryPerformanceFrequency(&gFreq)) { + gHaveHiResTimer = 1; + } + } + if (gHaveHiResTimer) { + QueryPerformanceCounter(&lCounter); + return lCounter.u.LowPart; + } else { + return (unsigned long) clock(); + } +} + +double GetPerfSec(double pTime) +{ + if (gHaveHiResTimer) { + return pTime / gFreq.u.LowPart; // assumes HighPart==0 + + } else { + return pTime / CLOCKS_PER_SEC; + } +} + +#endif /* HAVE_WIN32_TIMER */ + +#if defined(FFTW_USE_GETTIMEOFDAY) + +/* timer support routines for systems having gettimeofday */ + +#if defined(HAVE_BSDGETTIMEOFDAY) && ! defined(HAVE_GETTIMEOFDAY) +#define gettimeofday BSDgettimeofday +#endif + +fftw_time fftw_gettimeofday_get_time(void) +{ + struct timeval tv; + gettimeofday(&tv, 0); + return tv; +} + +fftw_time fftw_gettimeofday_time_diff(fftw_time t1, fftw_time t2) +{ + fftw_time diff; + + diff.tv_sec = t1.tv_sec - t2.tv_sec; + diff.tv_usec = t1.tv_usec - t2.tv_usec; + /* normalize */ + while (diff.tv_usec < 0) { + diff.tv_usec += 1000000L; + diff.tv_sec -= 1; + } + + return diff; +} +#endif |