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https://github.com/FFmpeg/FFmpeg.git
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116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include "softfloat.h"
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#include "common.h"
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#include "log.h"
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#ifdef TEST
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#include <stdio.h>
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static const SoftFloat FLOAT_0_017776489257 = {0x1234, 12};
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static const SoftFloat FLOAT_1374_40625 = {0xabcd, 25};
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static const SoftFloat FLOAT_0_1249694824218 = {0xFFF, 15};
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int main(void){
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SoftFloat one= av_int2sf(1, 0);
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SoftFloat sf1, sf2, sf3;
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double d1, d2, d3;
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int i, j;
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av_log_set_level(AV_LOG_DEBUG);
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d1= 1;
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for(i= 0; i<10; i++){
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d1= 1/(d1+1);
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}
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printf("test1 double=%d\n", (int)(d1 * (1<<24)));
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sf1= one;
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for(i= 0; i<10; i++){
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sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
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}
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printf("test1 sf =%d\n", av_sf2int(sf1, 24));
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for(i= 0; i<100; i++){
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START_TIMER
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d1= i;
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d2= i/100.0;
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for(j= 0; j<1000; j++){
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d1= (d1+1)*d2;
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}
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STOP_TIMER("float add mul")
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}
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printf("test2 double=%d\n", (int)(d1 * (1<<24)));
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for(i= 0; i<100; i++){
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START_TIMER
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sf1= av_int2sf(i, 0);
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sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
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for(j= 0; j<1000; j++){
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sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
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}
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STOP_TIMER("softfloat add mul")
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}
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printf("test2 sf =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
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d1 = 0.0177764893;
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d2 = 1374.40625;
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d3 = 0.1249694824;
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d2 += d1;
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d3 += d2;
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printf("test3 double: %.10lf\n", d3);
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sf1 = FLOAT_0_017776489257;
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sf2 = FLOAT_1374_40625;
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sf3 = FLOAT_0_1249694824218;
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sf2 = av_add_sf(sf1, sf2);
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sf3 = av_add_sf(sf3, sf2);
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printf("test3 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf3), sf3.mant, sf3.exp);
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sf1 = av_int2sf(0xFFFFFFF0, 0);
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printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
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sf1 = av_int2sf(0x00000010, 0);
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printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
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sf1 = av_int2sf(0x1FFFFFFF, 0);
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printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
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sf1 = av_int2sf(0xE0000001, 0);
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printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
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for(i= 0; i<4*36; i++){
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int s, c;
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double errs, errc;
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av_sincos_sf(i*(1ULL<<32)/36/4, &s, &c);
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errs = (double)s/ (1<<30) - sin(i*M_PI/36);
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errc = (double)c/ (1<<30) - cos(i*M_PI/36);
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if (fabs(errs) > 0.00000002 || fabs(errc) >0.001) {
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printf("sincos FAIL %d %f %f %f %f\n", i, (float)s/ (1<<30), (float)c/ (1<<30), sin(i*M_PI/36), cos(i*M_PI/36));
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}
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}
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return 0;
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}
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#endif
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