1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "libavutil/timer.h"
22
23#include <inttypes.h>
24
25#include "libavutil/softfloat.h"
26#include "libavutil/common.h"
27#include "libavutil/log.h"
28
29#include <stdio.h>
30
31static const SoftFloat FLOAT_0_017776489257 = {0x1234, 12};
32static const SoftFloat FLOAT_1374_40625 = {0xabcd, 25};
33static const SoftFloat FLOAT_0_1249694824218 = {0xFFF, 15};
34
35
36int main(void){
37    SoftFloat one= av_int2sf(1, 0);
38    SoftFloat sf1, sf2, sf3;
39    double d1, d2, d3;
40    int i, j;
41    av_log_set_level(AV_LOG_DEBUG);
42
43    d1= 1;
44    for(i= 0; i<10; i++){
45        d1= 1/(d1+1);
46    }
47    printf("test1 double=%d\n", (int)(d1 * (1<<24)));
48
49    sf1= one;
50    for(i= 0; i<10; i++){
51        sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
52    }
53    printf("test1 sf    =%d\n", av_sf2int(sf1, 24));
54
55
56    for(i= 0; i<100; i++){
57        START_TIMER
58        d1= i;
59        d2= i/100.0;
60        for(j= 0; j<1000; j++){
61            d1= (d1+1)*d2;
62        }
63        STOP_TIMER("float add mul")
64    }
65    printf("test2 double=%d\n", (int)(d1 * (1<<24)));
66
67    for(i= 0; i<100; i++){
68        START_TIMER
69        sf1= av_int2sf(i, 0);
70        sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
71        for(j= 0; j<1000; j++){
72            sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
73        }
74        STOP_TIMER("softfloat add mul")
75    }
76    printf("test2 sf    =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
77
78    d1 = 0.0177764893;
79    d2 = 1374.40625;
80    d3 = 0.1249694824;
81    d2 += d1;
82    d3 += d2;
83    printf("test3 double: %.10lf\n", d3);
84
85    sf1 = FLOAT_0_017776489257;
86    sf2 = FLOAT_1374_40625;
87    sf3 = FLOAT_0_1249694824218;
88    sf2 = av_add_sf(sf1, sf2);
89    sf3 = av_add_sf(sf3, sf2);
90    printf("test3 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf3), sf3.mant, sf3.exp);
91
92    sf1 = av_int2sf(0xFFFFFFF0, 0);
93    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
94    sf1 = av_int2sf(0x00000010, 0);
95    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
96
97    sf1 = av_int2sf(0x1FFFFFFF, 0);
98    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
99    sf1 = av_int2sf(0xE0000001, 0);
100    printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
101
102
103    sf1 = (SoftFloat){ 0x20000000,   MIN_EXP };
104    sf1 = av_mul_sf(sf1, sf1);
105    printf("test5 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
106
107    sf1 = (SoftFloat){ 0x20000000,   MIN_EXP };
108    sf2 = (SoftFloat){ 0x20000000,   MAX_EXP };
109    i = av_cmp_sf(sf1, sf2);
110    j = av_cmp_sf(sf2, sf1);
111    sf1 = av_div_sf(sf1, sf2);
112    printf("test6 softfloat: %.10lf (0x%08x %d) %d %d\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp, i, j);
113
114    for(i= -50; i<50; i++) {
115        sf1= av_int2sf(i, 0);
116        for(j= -50; j<50; j++) {
117            int c;
118            sf2= av_int2sf(j, 0);
119            c = av_cmp_sf(sf1, sf2);
120            if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c)<0) {
121                printf("av_cmp_sf failed at %d %d as %X\n", i, j, c);
122            }
123            c = av_gt_sf(sf1, sf2);
124            if ((i>j) != c) {
125                printf("av_gt_sf failed at %d %d as %X\n", i, j, c);
126            }
127        }
128        sf1 = av_int2sf(1, i);
129        for(j = -50; j < 50; j++) {
130            int c;
131            sf2 = av_int2sf(1, j);
132            c = av_cmp_sf(sf2, sf1);
133            if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c) < 0) {
134                printf("av_cmp_sf failed2 at %d %d as %X\n", i, j, c);
135            }
136            c = av_gt_sf(sf1, sf2);
137            if ((i<j) != c) {
138                printf("av_gt_sf failed2 at %d %d as %X\n", i, j, c);
139            }
140        }
141    }
142
143
144    for(i= 0; i<4*36; i++){
145        int s, c;
146        double errs, errc;
147
148        av_sincos_sf(i*(1ULL<<32)/36/4, &s, &c);
149        errs = (double)s/ (1<<30) - sin(i*M_PI/36);
150        errc = (double)c/ (1<<30) - cos(i*M_PI/36);
151        if (fabs(errs) > 0.000000004 || fabs(errc) >0.000000004) {
152            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));
153        }
154
155    }
156    return 0;
157
158}
159