package cloud.lesh.CPUSim64v2;

import java.util.HashMap;
import java.util.Map;

public enum Opcode {
	// Numbers from your “Instructions” table (iiiiii, 0..63)
	NOP(0),
	DEBUG(0),
	CLEAR(1),
	MOVE(2),
	LOAD(3),
	STORE(4),
	POP(5),
	PUSH(6),
	JUMP(7),
	CALL(8),
	RETURN(9),
	INTERRUPT(10),
	STOP(11),
	NEGATE(12),
	ADD(13),
	SUBTRACT(14),
	MULTIPLY(15),
	DIVIDE(16),
	RECIP(16),           // RECIP is grouped under 16 in your doc
	COMPL(17),
	AND(18),
	OR(19),
	XOR(20),
	TEST(21),
	CMP(22),
	LSHIFT(23),
	RSHIFT(24),
	ARSHIFT(25),
	LROTATE(26),
	RROTATE(27),
	IN(28),
	OUT(29),
	PACK(30),
	PACK64(31),
	UNPACK(32),
	UNPACK64(33),
	CAS(34),
	ENDIAN(35),
	SAVE(36),
	RESTORE(37),
	READONLY(38),
	UNDEFINED(-1);

	public final int code;
	static Map<Integer, Opcode> codeMap = new HashMap<Integer, Opcode>();
	static Map<String, Opcode> nameMap = new HashMap<String, Opcode>();
	Opcode(int code) {
		this.code = code;
	}

	static {
		for (var e : Opcode.values()) {
			nameMap.put(e.name(), e);
			codeMap.put(e.code, e);
		}
	}

	public int getCode() { return code; }
	public String getName() { return name(); }

	public static Opcode fromCode(int op) {
		var e = codeMap.get(op);
		if (e == null) e = UNDEFINED;
		return e;
	}

	public static Opcode fromName(String n) {
		var e = nameMap.get(n);
		if (e == null) e = UNDEFINED;
		return e;
	}
}
