/* * 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 "libavutil/timer.h" #include <inttypes.h> #include "libavutil/softfloat.h"#include "libavutil/common.h"#include "libavutil/log.h" #include <stdio.h> static const SoftFloat FLOAT_0_017776489257 = {0x1234, 12};static const SoftFloat FLOAT_1374_40625 = {0xabcd, 25};static const SoftFloat FLOAT_0_1249694824218 = {0xFFF, 15};  int main(void){    SoftFloat one= av_int2sf(1, 0);    SoftFloat sf1, sf2, sf3;    double d1, d2, d3;    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);     d1 = 0.0177764893;    d2 = 1374.40625;    d3 = 0.1249694824;    d2 += d1;    d3 += d2;    printf("test3 double: %.10lf\n", d3);     sf1 = FLOAT_0_017776489257;    sf2 = FLOAT_1374_40625;    sf3 = FLOAT_0_1249694824218;    sf2 = av_add_sf(sf1, sf2);    sf3 = av_add_sf(sf3, sf2);    printf("test3 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf3), sf3.mant, sf3.exp);     sf1 = av_int2sf(0xFFFFFFF0, 0);    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);    sf1 = av_int2sf(0x00000010, 0);    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);     sf1 = av_int2sf(0x1FFFFFFF, 0);    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);    sf1 = av_int2sf(0xE0000001, 0);    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);      sf1 = (SoftFloat){ 0x20000000,   MIN_EXP };    sf1 = av_mul_sf(sf1, sf1);    printf("test5 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);     sf1 = (SoftFloat){ 0x20000000,   MIN_EXP };    sf2 = (SoftFloat){ 0x20000000,   MAX_EXP };    i = av_cmp_sf(sf1, sf2);    j = av_cmp_sf(sf2, sf1);    sf1 = av_div_sf(sf1, sf2);    printf("test6 softfloat: %.10lf (0x%08x %d) %d %d\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp, i, j);     for(i= -50; i<50; i++) {        sf1= av_int2sf(i, 0);        for(j= -50; j<50; j++) {            int c;            sf2= av_int2sf(j, 0);            c = av_cmp_sf(sf1, sf2);            if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c)<0) {                printf("av_cmp_sf failed at %d %d as %X\n", i, j, c);            }            c = av_gt_sf(sf1, sf2);            if ((i>j) != c) {                printf("av_gt_sf failed at %d %d as %X\n", i, j, c);            }        }        sf1 = av_int2sf(1, i);        for(j = -50; j < 50; j++) {            int c;            sf2 = av_int2sf(1, j);            c = av_cmp_sf(sf2, sf1);            if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c) < 0) {                printf("av_cmp_sf failed2 at %d %d as %X\n", i, j, c);            }            c = av_gt_sf(sf1, sf2);            if ((i<j) != c) {                printf("av_gt_sf failed2 at %d %d as %X\n", i, j, c);            }        }    }      for(i= 0; i<4*36; i++){        int s, c;        double errs, errc;         av_sincos_sf(i*(1ULL<<32)/36/4, &s, &c);        errs = (double)s/ (1<<30) - sin(i*M_PI/36);        errc = (double)c/ (1<<30) - cos(i*M_PI/36);        if (fabs(errs) > 0.00000002 || fabs(errc) >0.001) {            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));        }     }    return 0; }