/* * 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 "libavutil/timer.h" #include <inttypes.h> #include "libavutil/softfloat.h" #include "libavutil/common.h" #include "libavutil/log.h" #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= -50; i<50; i++) { sf1= av_int2sf(i, 0); for(j= -50; j<50; 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); } c = av_gt_sf(sf1, sf2); if ((i>j) != c) { printf("av_gt_sf failed at %d %d as %X\n", i, j, c); } } sf1 = av_int2sf(1, i); for(j = -50; j < 50; j++) { int c; sf2 = av_int2sf(1, j); c = av_cmp_sf(sf2, sf1); if (FFDIFFSIGN(i,j) != c && (FFDIFFSIGN(i,j)^c) < 0) { printf("av_cmp_sf failed2 at %d %d as %X\n", i, j, c); } c = av_gt_sf(sf1, sf2); if ((i<j) != c) { printf("av_gt_sf failed2 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; }