1 cananian 1.1.2.1 // Uop.java, created Thu Feb 4 22:13:12 1999 by cananian
2 cananian 1.1.2.1 // Copyright (C) 1999 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.2.1 package harpoon.IR.Tree;
5 cananian 1.1.2.1
6 cananian 1.1.2.1 /**
7 cananian 1.1.2.1 * <code>Uop</code> is an enumerated type for <code>UNOP</code>s.
8 cananian 1.1.2.1 * Operations are typed: pointer (P), integer (I), long (L), float (F) or
9 cananian 1.1.2.1 * double (D).
10 cananian 1.1.2.2 * <p>
11 cananian 1.1.2.2 * See <code>Bop</code> for basic rationale. We provide full set of
12 cananian 1.1.2.2 * conversion operations and both negation and bitwise-not. Some of
13 pnkfelix 1.1.2.4 * these <code>Uop</code>s are not in <code>harpoon.IR.Quads.Qop</code>
14 cananian 1.1.2.2 * and thus will require pattern-matching during translation for
15 cananian 1.1.2.2 * proper generation. This could also be done in a peephole optimization.
16 cananian 1.1.2.1 *
17 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
18 cananian 1.2 * @version $Id: Uop.java,v 1.2 2002/02/25 21:05:42 cananian Exp $
19 cananian 1.1.2.1 */
20 cananian 1.1.2.1 public class Uop {
21 pnkfelix 1.1.2.3
22 cananian 1.1.2.5 /** Negation (<code>-</code>). */
23 pnkfelix 1.1.2.3 public final static int NEG=0;
24 cananian 1.1.2.5 /** Bit-wise NOT (<code>~</code>). */
25 pnkfelix 1.1.2.3 public final static int NOT=1;
26 pnkfelix 1.1.2.3
27 cananian 1.1.2.1 // int conversion
28 pnkfelix 1.1.2.3
29 pnkfelix 1.1.2.3 /** Converts an int to a byte. Result is still int type, but it
30 pnkfelix 1.1.2.3 is truncated to 8 bits, then sign extended.
31 pnkfelix 1.1.2.3 */
32 cananian 1.1.2.6 public final static int I2B=2;
33 pnkfelix 1.1.2.3
34 pnkfelix 1.1.2.3 /** Converts an int to a character. Result is still int type, but
35 pnkfelix 1.1.2.3 is truncated to 16 bits. No sign extension.
36 pnkfelix 1.1.2.3 */
37 cananian 1.1.2.6 public final static int I2C=3;
38 pnkfelix 1.1.2.3
39 pnkfelix 1.1.2.3 /** Converts an int to a short. Result is still int type, but is
40 pnkfelix 1.1.2.3 truncated to 16 bits, then sign extended.
41 pnkfelix 1.1.2.3 */
42 cananian 1.1.2.6 public final static int I2S=4;
43 pnkfelix 1.1.2.3
44 cananian 1.1.2.1 // general conversion
45 pnkfelix 1.1.2.3 /** Converts to int. */
46 pnkfelix 1.1.2.3 public final static int _2I=5;
47 pnkfelix 1.1.2.3 /** Converts to long. */
48 pnkfelix 1.1.2.3 public final static int _2L=6;
49 pnkfelix 1.1.2.3 /** Converts to float. */
50 pnkfelix 1.1.2.3 public final static int _2F=7;
51 pnkfelix 1.1.2.3 /** Converts to double. */
52 pnkfelix 1.1.2.3 public final static int _2D=8;
53 cananian 1.1.2.1
54 cananian 1.1.2.1 /** Determines if the given <code>Uop</code> value is valid. */
55 cananian 1.1.2.1 public static boolean isValid(int op) {
56 cananian 1.1.2.1 switch (op) {
57 cananian 1.1.2.1 case NEG:
58 cananian 1.1.2.1 case NOT:
59 cananian 1.1.2.6 case I2B: case I2C: case I2S:
60 cananian 1.1.2.1 case _2I: case _2L: case _2F: case _2D:
61 cananian 1.1.2.1 return true;
62 cananian 1.1.2.1 default:
63 cananian 1.1.2.1 return false;
64 cananian 1.1.2.1 }
65 cananian 1.1.2.1 }
66 cananian 1.1.2.1
67 cananian 1.1.2.1 /** Converts the enumerated <code>Uop</code> value to
68 cananian 1.1.2.1 * a human-readable string. */
69 cananian 1.1.2.1 public static String toString(int op) {
70 cananian 1.1.2.1 switch (op) {
71 cananian 1.1.2.1 case NEG: return "neg";
72 cananian 1.1.2.1 case NOT: return "not";
73 cananian 1.1.2.6 case I2B: return "i2b";
74 cananian 1.1.2.6 case I2C: return "i2c";
75 cananian 1.1.2.6 case I2S: return "i2s";
76 cananian 1.1.2.1 case _2I: return "_2i";
77 cananian 1.1.2.1 case _2L: return "_2l";
78 cananian 1.1.2.1 case _2F: return "_2f";
79 cananian 1.1.2.1 case _2D: return "_2d";
80 cananian 1.1.2.1 default: throw new RuntimeException("Unknown Uop type: "+op);
81 cananian 1.1.2.1 }
82 cananian 1.1.2.1 }
83 cananian 1.2 }