/*
* MathOpcodes.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 2002 by Matthias Pfisterer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
|<--- this code is formatted to fit into 80 columns --->|
*/
package org.tritonus.saol.engine.opcodes;
import org.tritonus.saol.compiler.WidthAndRate;
/** The Math Opcodes (Section 5.9.4).
*/
public class MathOpcodes
{
private static final float LOG_10 = (float) Math.log(10.0);
public static void buildOpcodeTable(OpcodeTable opcodeTable)
{
OpcodeClass opcodeClass = new OpcodeClass("org.tritonus.saol.engine.opcodes.MathOpcodes", OpcodeClass.TYPE_STATIC);
opcodeTable.addEntry(new OpcodeEntry("int", opcodeClass, "_int", WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("frac", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("dbamp", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("ampdb", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("abs", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("sgn", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("exp", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("log", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("sqrt", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("sin", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("cos", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("atan", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("pow", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("log10", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("asin", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("acos", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("ceil", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("floor", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("min", opcodeClass, WidthAndRate.RATE_X));
opcodeTable.addEntry(new OpcodeEntry("max", opcodeClass, WidthAndRate.RATE_X));
}
public static float _int(float x)
{
return (float) ((long) x);
}
public static float frac(float x)
{
return x - _int(x);
}
public static float dbamp(float x)
{
return 90.0F + 20.0F * log10(x);
}
public static float ampdb(float x)
{
return pow(10.0F, (x - 90.0F) / 20.0F);
}
public static float abs(float x)
{
return Math.abs(x);
}
public static float sgn(float x)
{
return (x < 0.0F) ? -1.0F : ((x > 0.0F) ? +1.0F : 0.0F);
}
public static float exp(float x)
{
return (float) Math.exp(x);
}
public static float log(float x)
{
return (float) Math.log(x);
}
public static float sqrt(float x)
{
return (float) Math.sqrt(x);
}
public static float sin(float x)
{
return (float) Math.sin(x);
}
public static float cos(float x)
{
return (float) Math.cos(x);
}
public static float atan(float x)
{
return (float) Math.atan(x);
}
public static float pow(float x, float y)
{
return (float) Math.pow(x, y);
}
public static float log10(float x)
{
/* Uses the formula:
log-b (a) = ln (a) / ln (b)
(ln: logarithmus naturalis, logarith with base e)
*/
return (float) Math.log(x) * (1 / LOG_10);
}
public static float asin(float x)
{
return (float) Math.asin(x);
}
public static float acos(float x)
{
return (float) Math.acos(x);
}
public static float ceil(float x)
{
return (float) Math.ceil(x);
}
public static float floor(float x)
{
return (float) Math.floor(x);
}
public static float min(float[] x)
{
switch (x.length)
{
case 1:
return x[0];
case 2:
return Math.min(x[0], x[1]);
default:
float fMin = x[0];
for (int i = 1; i < x.length; i++)
{
fMin = Math.min(fMin, x[i]);
}
return fMin;
}
}
public static float max(float[] x)
{
switch (x.length)
{
case 1:
return x[0];
case 2:
return Math.max(x[0], x[1]);
default:
float fMax = x[0];
for (int i = 1; i < x.length; i++)
{
fMax = Math.max(fMax, x[i]);
}
return fMax;
}
}
}
/*** MathOpcodes.java ***/