FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavutil/tests/softfloat.c
Date: 2026-09-30 10:56:58
Exec Total Coverage
Lines: 77 82 93.9%
Functions: 1 1 100.0%
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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
31 static const SoftFloat FLOAT_0_017776489257 = {0x1234, 12};
32 static const SoftFloat FLOAT_1374_40625 = {0xabcd, 25};
33 static const SoftFloat FLOAT_0_1249694824218 = {0xFFF, 15};
34
35
36 1 int main(void){
37 1 SoftFloat one= av_int2sf(1, 0);
38 SoftFloat sf1, sf2, sf3;
39 double d1, d2, d3;
40 int i, j;
41 1 av_log_set_level(AV_LOG_DEBUG);
42
43 1 d1= 1;
44
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 11 for(i= 0; i<10; i++){
45 10 d1= 1/(d1+1);
46 }
47 1 printf("test1 double=%d\n", (int)(d1 * (1<<24)));
48
49 1 sf1= one;
50
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 11 for(i= 0; i<10; i++){
51 10 sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
52 }
53 1 printf("test1 sf =%d\n", av_sf2int(sf1, 24));
54
55
56
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 101 for(i= 0; i<100; i++){
57 100 START_TIMER
58 100 d1= i;
59 100 d2= i/100.0;
60
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 100100 for(j= 0; j<1000; j++){
61 100000 d1= (d1+1)*d2;
62 }
63
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 324 STOP_TIMER("float add mul")
64 }
65 1 printf("test2 double=%d\n", (int)(d1 * (1<<24)));
66
67
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 101 for(i= 0; i<100; i++){
68 100 START_TIMER
69 100 sf1= av_int2sf(i, 0);
70 100 sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
71
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 100100 for(j= 0; j<1000; j++){
72 100000 sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
73 }
74
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 324 STOP_TIMER("softfloat add mul")
75 }
76 1 printf("test2 sf =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
77
78 1 d1 = 0.0177764893;
79 1 d2 = 1374.40625;
80 1 d3 = 0.1249694824;
81 1 d2 += d1;
82 1 d3 += d2;
83 1 printf("test3 double: %.10lf\n", d3);
84
85 1 sf1 = FLOAT_0_017776489257;
86 1 sf2 = FLOAT_1374_40625;
87 1 sf3 = FLOAT_0_1249694824218;
88 1 sf2 = av_add_sf(sf1, sf2);
89 1 sf3 = av_add_sf(sf3, sf2);
90 1 printf("test3 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf3), sf3.mant, sf3.exp);
91
92 1 sf1 = av_int2sf(0xFFFFFFF0, 0);
93 1 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
94 1 sf1 = av_int2sf(0x00000010, 0);
95 1 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
96
97 1 sf1 = av_int2sf(0x1FFFFFFF, 0);
98 1 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
99 1 sf1 = av_int2sf(0xE0000001, 0);
100 1 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
101
102
103 1 sf1 = (SoftFloat){ 0x20000000, MIN_EXP };
104 1 sf1 = av_mul_sf(sf1, sf1);
105 1 printf("test5 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
106
107 1 sf1 = (SoftFloat){ 0x20000000, MIN_EXP };
108 1 sf2 = (SoftFloat){ 0x20000000, MAX_EXP };
109 1 i = av_cmp_sf(sf1, sf2);
110 1 j = av_cmp_sf(sf2, sf1);
111 1 sf1 = av_div_sf(sf1, sf2);
112 1 printf("test6 softfloat: %.10lf (0x%08x %d) %d %d\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp, i, j);
113
114
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 101 for(i= -50; i<50; i++) {
115 100 sf1= av_int2sf(i, 0);
116
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 10100 for(j= -50; j<50; j++) {
117 int c;
118 10000 sf2= av_int2sf(j, 0);
119 10000 c = av_cmp_sf(sf1, sf2);
120
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 10000 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 10000 c = av_gt_sf(sf1, sf2);
124
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 10000 if ((i>j) != c) {
125 ✗ printf("av_gt_sf failed at %d %d as %X\n", i, j, c);
126 }
127 }
128 100 sf1 = av_int2sf(1, i);
129
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 10100 for(j = -50; j < 50; j++) {
130 int c;
131 10000 sf2 = av_int2sf(1, j);
132 10000 c = av_cmp_sf(sf2, sf1);
133
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 10000 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 10000 c = av_gt_sf(sf1, sf2);
137
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 10000 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
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 145 for(i= 0; i<4*36; i++){
145 int s, c;
146 double errs, errc;
147
148 144 av_sincos_sf(i*(1ULL<<32)/36/4, &s, &c);
149 144 errs = (double)s/ (1<<30) - sin(i*M_PI/36);
150 144 errc = (double)c/ (1<<30) - cos(i*M_PI/36);
151
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 144 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 1 return 0;
157
158 }
159