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/*! ========================================================================
** Extended Template and Library Test Suite
** Fixed-Point Math Test
** $Id$
**
** Copyright (c) 2002 Robert B. Quattlebaum Jr.
** Copyright (c) 2007 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package 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
** General Public License for more details.
**
** === N O T E S ===========================================================
**
** ========================================================================= */
/* === H E A D E R S ======================================================= */
#define ETL_FIXED_BITS 12
#include <ETL/fixed>
#include <stdio.h>
#include <ETL/clock>
/* === M A C R O S ========================================================= */
#ifndef PI
# define PI (3.1415926535897932384626433832795029L)
#endif
#define ADD_SUB_TEST 20000000
#define MUL_TEST 10000000
#define DIV_TEST 1048573 // at 1048573, fixed point numbers wrap around to zero
using namespace etl;
/* === C L A S S E S ======================================================= */
template <class value_type>
struct speed_test
{
double add_sub_test(void)
{
value_type a=1;
value_type b=2;
value_type c=3;
int i;
etl::clock MyTimer;
MyTimer.reset();
for(i=0;i<ADD_SUB_TEST;i++)
{
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
a+=a; a-=b; a-=c; a+=a;
}
fprintf(stderr, "[%1d]...", int(int(a)/1e9)+5); // so the compiler doesn't optimize everything out
return MyTimer();
}
double mul_test(void)
{
value_type a,b,c,d;
a=value_type(2.25);
b=value_type(2);
c=value_type(4.5);
d=value_type(1);
const value_type one_and_a_half(static_cast<value_type>(1.5));
int i;
etl::clock MyTimer;
MyTimer.reset();
for(i=1;i<MUL_TEST;i++)
{
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
d*=a;d*=b;d*=c;d*=3;d*=i; b*=c;b*=d;b*=d;b*=3; c*=d;c*=one_and_a_half;c*=a;c*=b;c*=3; a*=c;a*=b;a*=3;
}
fprintf(stderr, "[%1d]...", int(int(a)/1e9)+5); // so the compiler doesn't optimize everything out
return MyTimer();
}
double div_test(void)
{
value_type a(30);
value_type b(40);
value_type acc(0);
int i, j;
etl::clock MyTimer;
MyTimer.reset();
for(j=0;j<10;j++)
for(i=1;i<DIV_TEST;i++)
{
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
a=3+i; b=40+i; b/=a; a/=(i%20)+1; acc+= a;
}
fprintf(stderr, "[%1d]...", int(int(acc)/1e9)+5); // so the compiler doesn't optimize everything out
return MyTimer();
}
};
/* === P R O C E D U R E S ================================================= */
int basic_test(void)
{
int ret=0;
fixed a,b,c;
double d;
a=-1;
a=std::abs(a);
if(a!=fixed(1))
{
fprintf(stderr, "fixed: abs() failure on line %d in " __FILE__ ".\n", __LINE__);
ret++;
}
d=(double)(fixed(2.5)*fixed(3.0f)/7)-(2.5f*3.0f/7.0f);
fprintf(stderr,"fixed: 2.5 * 2 / 7 --- Difference: %f\n",d);
if(d<0.0)d=-d;
if( d>0.0005)
{
fprintf(stderr, "fixed: Failed test on line %d in " __FILE__ ".\n", __LINE__);
ret++;
}
a=1043;d=1043;
a/=27;d/=27;
a+=10.42;d+=10.42;
a/=6;d/=6;
a*=PI;d*=PI;
d-=(double)a;
fprintf(stderr,"fixed: ( 1043 / 27 + 10.42 ) / 6 * PI --- Difference: %f\n",d);
if(d<0.0)d=-d;
#ifdef ROUND_TO_NEAREST_INTEGER
if( d>0.0005)
#else
if( d>0.0025)
#endif
{
fprintf(stderr,"fixed: Failed test on line %d in " __FILE__ ".\n", __LINE__);
ret++;
}
return ret;
}
int char_test(void)
{
int ret=0;
fixed_base<unsigned char,8> fix;
double flt;
if(sizeof(fix)!=sizeof(unsigned char))
{
ret++;
fprintf(stderr,"fixed: Size of fixed_base<unsigned char,8> is wrong!\n");
}
flt=1.0;
fix=1.0;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=0.7;
fix*=0.7;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=0.7;
fix*=0.7;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=0.7;
fix*=0.7;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=0.7;
fix*=0.7;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=0.7;
fix*=0.7;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
//flt/=0.7;
//fix/=0.7;
//fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt+=0.3;
fix+=0.3;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
flt*=2;
fix*=2;
fprintf(stderr,"fixed: value=%f, data=%d, shouldbe=%f, error=%f\n",(float)fix,fix.data(),flt,(float)fix-flt);
return ret;
}
/* === E N T R Y P O I N T ================================================= */
int main()
{
int error=0;
error+=basic_test();
error+=char_test();
speed_test<float> float_test;
speed_test<int> int_test;
speed_test<fixed> fixed_test;
{
double flt,fix,inte;
fprintf(stderr,"\nAddition/subtraction test...\n");
fprintf(stderr," calculating float.....");
flt=float_test.add_sub_test();
fprintf(stderr," float time: %f sec\n",flt);
fprintf(stderr," calculating fixed.....");
fix=fixed_test.add_sub_test();
fprintf(stderr," fixed time: %f sec\n",fix);
fprintf(stderr," calculating integer...");
inte=int_test.add_sub_test();
fprintf(stderr," integer time: %f sec\n",inte);
if(flt>fix)
fprintf(stderr,"Fixed point wins by %f seconds! (%f%% faster)\n",flt-fix,flt/fix*100.0f-100.0f);
else
fprintf(stderr,"Floating point wins by %f seconds! (%f%% faster)\n",fix-flt,fix/flt*100.0f-100.0f);
}
{
double flt,fix,inte;
fprintf(stderr,"\nProduct test...\n");
fprintf(stderr," calculating float.....");
flt=float_test.mul_test();
fprintf(stderr," float time: %f sec\n",flt);
fprintf(stderr," calculating fixed.....");
fix=fixed_test.mul_test();
fprintf(stderr," fixed time: %f sec\n",fix);
fprintf(stderr," calculating integer...");
inte=int_test.mul_test();
fprintf(stderr," integer time: %f sec\n",inte);
if(flt>fix)
fprintf(stderr,"Fixed point wins by %f seconds! (%f%% faster)\n",flt-fix,flt/fix*100.0f-100.0f);
else
fprintf(stderr,"Floating point wins by %f seconds! (%f%% faster)\n",fix-flt,fix/flt*100.0f-100.0f);
}
{
double flt,fix,inte;
fprintf(stderr,"\nDivision test...\n");
fprintf(stderr," calculating float.....");
flt=float_test.div_test();
fprintf(stderr," float time: %f sec\n",flt);
fprintf(stderr," calculating fixed.....");
fix=fixed_test.div_test();
fprintf(stderr," fixed time: %f sec\n",fix);
fprintf(stderr," calculating integer...");
inte=int_test.div_test();
fprintf(stderr," integer time: %f sec\n",inte);
if(flt>fix)
fprintf(stderr,"Fixed point wins by %f seconds! (%f%% faster)\n",flt-fix,flt/fix*100.0f-100.0f);
else
fprintf(stderr,"Floating point wins by %f seconds! (%f%% faster)\n",fix-flt,fix/flt*100.0f-100.0f);
fprintf(stderr,"\n");
}
return error;
}
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