1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* 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 "softfloat.h"
#include "common.h"
#include "log.h"
#ifdef TEST
#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= 0; i<100; i++) {
sf1= av_int2sf(i, 0);
for(j= 0; j<100; 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);
}
}
}
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;
}
#endif
|
