/* * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <inttypes.h> #include <stdio.h> #include "softfloat.h" #include "common.h" #include "log.h" #undef printf int main(void){ SoftFloat one= av_int2sf(1, 0); SoftFloat sf1, sf2; double d1, d2; int i, j; av_log_set_level(AV_LOG_DEBUG); d1= 1; for(i= 0; i<10; i++){ d1= 1/(d1+1); } printf("test1 double=%d\n", (int)(d1 * (1<<24))); sf1= one; for(i= 0; i<10; i++){ sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1))); } printf("test1 sf =%d\n", av_sf2int(sf1, 24)); for(i= 0; i<100; i++){ START_TIMER d1= i; d2= i/100.0; for(j= 0; j<1000; j++){ d1= (d1+1)*d2; } STOP_TIMER("float add mul") } printf("test2 double=%d\n", (int)(d1 * (1<<24))); for(i= 0; i<100; i++){ START_TIMER sf1= av_int2sf(i, 0); sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3)); for(j= 0; j<1000; j++){ sf1= av_mul_sf(av_add_sf(sf1, one),sf2); } STOP_TIMER("softfloat add mul") } printf("test2 sf =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant); return 0; }