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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 <inttypes.h> | |
22 | #include <stdio.h> | |
23 | #include "softfloat.h" | |
24 | #include "common.h" | |
25 | #include "log.h" | |
26 | ||
27 | #undef printf | |
28 | ||
29 | int main(void){ | |
30 | SoftFloat one= av_int2sf(1, 0); | |
31 | SoftFloat sf1, sf2; | |
32 | double d1, d2; | |
33 | int i, j; | |
34 | av_log_set_level(AV_LOG_DEBUG); | |
35 | ||
36 | d1= 1; | |
37 | for(i= 0; i<10; i++){ | |
38 | d1= 1/(d1+1); | |
39 | } | |
40 | printf("test1 double=%d\n", (int)(d1 * (1<<24))); | |
41 | ||
42 | sf1= one; | |
43 | for(i= 0; i<10; i++){ | |
44 | sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1))); | |
45 | } | |
46 | printf("test1 sf =%d\n", av_sf2int(sf1, 24)); | |
47 | ||
48 | ||
49 | for(i= 0; i<100; i++){ | |
50 | START_TIMER | |
51 | d1= i; | |
52 | d2= i/100.0; | |
53 | for(j= 0; j<1000; j++){ | |
54 | d1= (d1+1)*d2; | |
55 | } | |
56 | STOP_TIMER("float add mul") | |
57 | } | |
58 | printf("test2 double=%d\n", (int)(d1 * (1<<24))); | |
59 | ||
60 | for(i= 0; i<100; i++){ | |
61 | START_TIMER | |
62 | sf1= av_int2sf(i, 0); | |
63 | sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3)); | |
64 | for(j= 0; j<1000; j++){ | |
65 | sf1= av_mul_sf(av_add_sf(sf1, one),sf2); | |
66 | } | |
67 | STOP_TIMER("softfloat add mul") | |
68 | } | |
69 | printf("test2 sf =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant); | |
70 | return 0; | |
71 | } |