harpoon.IR.Tree
Class Uop

java.lang.Object
  harpoon.IR.Tree.Uop

public class Uop
extends Object

Uop is an enumerated type for UNOPs. Operations are typed: pointer (P), integer (I), long (L), float (F) or double (D).

See Bop for basic rationale. We provide full set of conversion operations and both negation and bitwise-not. Some of these Uops are not in harpoon.IR.Quads.Qop and thus will require pattern-matching during translation for proper generation. This could also be done in a peephole optimization.

Version:

$Id: Uop.java,v 1.2 2002/02/25 21:05:42 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

Field Summary

static int	_2D Converts to double.
static int	_2F Converts to float.
static int	_2I Converts to int.
static int	_2L Converts to long.
static int	I2B Converts an int to a byte.
static int	I2C Converts an int to a character.
static int	I2S Converts an int to a short.
static int	NEG Negation (-).
static int	NOT Bit-wise NOT (~).

Constructor Summary

Uop()

Method Summary

static boolean	isValid(int op) Determines if the given Uop value is valid.
static String	toString(int op) Converts the enumerated Uop value to a human-readable string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NEG

public static final int NEG

Negation (-).

See Also:

Constant Field Values

NOT

public static final int NOT

Bit-wise NOT (~).

See Also:

Constant Field Values

I2B

public static final int I2B

Converts an int to a byte. Result is still int type, but it is truncated to 8 bits, then sign extended.

See Also:

Constant Field Values

I2C

public static final int I2C

Converts an int to a character. Result is still int type, but is truncated to 16 bits. No sign extension.

See Also:

Constant Field Values

I2S

public static final int I2S

Converts an int to a short. Result is still int type, but is truncated to 16 bits, then sign extended.

See Also:

Constant Field Values

_2I

public static final int _2I

Converts to int.

See Also:

Constant Field Values

_2L

public static final int _2L

Converts to long.

See Also:

Constant Field Values

_2F

public static final int _2F

Converts to float.

See Also:

Constant Field Values

_2D

public static final int _2D

Converts to double.

See Also:

Constant Field Values

Constructor Detail

Uop

public Uop()

Method Detail

isValid

public static boolean isValid(int op)

Determines if the given Uop value is valid.

toString

public static String toString(int op)

Converts the enumerated Uop value to a human-readable string.