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91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
/*
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Copyright (c) 2004, 2006 Pablo Bleyer Kocik.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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import java.util.Vector;
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import java.util.HashMap;
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/** Base class for PicoBlaze instruction factory. */
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public abstract class Instruction {
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static int
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ifz,
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ifnz,
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ifc,
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ifnc,
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implied,
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register,
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disable,
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enable,
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posx,
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posy;
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/** Maps opcode names to values. */
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static HashMap<String,Integer> map;
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/** Create new instruction initializing opcode map.
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@param opname opcode names array
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@param opcode opcode values array
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*/
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public Instruction(String[] opname, int[] opcode) {
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if (map != null) return;
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map = new HashMap<String,Integer>();
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for (int i=0; i<opname.length; ++i)
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map.put(opname[i], new Integer(opcode[i]));
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}
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/** Code instruction.
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@param n instruction name
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@param a instruction argument list
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@param e assembly environment
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@return opcode value
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*/
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public abstract int code(String n, Vector a, Environment e);
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/** Convert condition name to value.
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@param c condition name
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@return condition value
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*/
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public static int translateCondition(String c) {
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if (c.equalsIgnoreCase("z")) return ifz;
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else if (c.equalsIgnoreCase("nz")) return ifnz;
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else if (c.equalsIgnoreCase("c")) return ifc;
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else if (c.equalsIgnoreCase("nc")) return ifnc;
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else throw new IllegalArgumentException("Invalid condition value");
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}
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/** Convert action name to value.
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@param a action name
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@return action value
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*/
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public static int translateAction(String a) {
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if (a.equalsIgnoreCase("disable")) return disable;
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else if (a.equalsIgnoreCase("enable")) return enable;
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else throw new IllegalArgumentException("Invalid action value");
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}
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}
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