2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/softfloat.h"
24 #include "libavutil/common.h"
25 #include "libavutil/log.h"
29 static const SoftFloat FLOAT_0_017776489257 = {0x1234, 12};
30 static const SoftFloat FLOAT_1374_40625 = {0xabcd, 25};
31 static const SoftFloat FLOAT_0_1249694824218 = {0xFFF, 15};
35 SoftFloat one= av_int2sf(1, 0);
36 SoftFloat sf1, sf2, sf3;
39 av_log_set_level(AV_LOG_DEBUG);
45 printf("test1 double=%d\n", (int)(d1 * (1<<24)));
49 sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
51 printf("test1 sf =%d\n", av_sf2int(sf1, 24));
54 for(i= 0; i<100; i++){
58 for(j= 0; j<1000; j++){
61 STOP_TIMER("float add mul")
63 printf("test2 double=%d\n", (int)(d1 * (1<<24)));
65 for(i= 0; i<100; i++){
68 sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
69 for(j= 0; j<1000; j++){
70 sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
72 STOP_TIMER("softfloat add mul")
74 printf("test2 sf =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
81 printf("test3 double: %.10lf\n", d3);
83 sf1 = FLOAT_0_017776489257;
84 sf2 = FLOAT_1374_40625;
85 sf3 = FLOAT_0_1249694824218;
86 sf2 = av_add_sf(sf1, sf2);
87 sf3 = av_add_sf(sf3, sf2);
88 printf("test3 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf3), sf3.mant, sf3.exp);
90 sf1 = av_int2sf(0xFFFFFFF0, 0);
91 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
92 sf1 = av_int2sf(0x00000010, 0);
93 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
95 sf1 = av_int2sf(0x1FFFFFFF, 0);
96 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
97 sf1 = av_int2sf(0xE0000001, 0);
98 printf("test4 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
101 sf1 = (SoftFloat){ 0x20000000, MIN_EXP };
102 sf1 = av_mul_sf(sf1, sf1);
103 printf("test5 softfloat: %.10lf (0x%08x %d)\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp);
105 sf1 = (SoftFloat){ 0x20000000, MIN_EXP };
106 sf2 = (SoftFloat){ 0x20000000, MAX_EXP };
107 i = av_cmp_sf(sf1, sf2);
108 j = av_cmp_sf(sf2, sf1);
109 sf1 = av_div_sf(sf1, sf2);
110 printf("test6 softfloat: %.10lf (0x%08x %d) %d %d\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp, i, j);
112 for(i= -50; i<50; i++) {
113 sf1= av_int2sf(i, 0);
114 for(j= -50; j<50; j++) {
116 sf2= av_int2sf(j, 0);
117 c = av_cmp_sf(sf1, sf2);
118 if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c)<0) {
119 printf("av_cmp_sf failed at %d %d as %X\n", i, j, c);
121 c = av_gt_sf(sf1, sf2);
123 printf("av_gt_sf failed at %d %d as %X\n", i, j, c);
126 sf1 = av_int2sf(1, i);
127 for(j = -50; j < 50; j++) {
129 sf2 = av_int2sf(1, j);
130 c = av_cmp_sf(sf2, sf1);
131 if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c) < 0) {
132 printf("av_cmp_sf failed2 at %d %d as %X\n", i, j, c);
134 c = av_gt_sf(sf1, sf2);
136 printf("av_gt_sf failed2 at %d %d as %X\n", i, j, c);
142 for(i= 0; i<4*36; i++){
146 av_sincos_sf(i*(1ULL<<32)/36/4, &s, &c);
147 errs = (double)s/ (1<<30) - sin(i*M_PI/36);
148 errc = (double)c/ (1<<30) - cos(i*M_PI/36);
149 if (fabs(errs) > 0.00000002 || fabs(errc) >0.001) {
150 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));