mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-27 18:02:11 +00:00
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
|
|
* 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;
|
|
}
|