X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=ETL%2Ftest%2Ffixed.cpp;fp=ETL%2Ftest%2Ffixed.cpp;h=965a8d30fde01b2206e3b2e2a3de88fe7bd69cfb;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/ETL/test/fixed.cpp b/ETL/test/fixed.cpp
new file mode 100644
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+++ b/ETL/test/fixed.cpp
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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;
+}