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comparison jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/JavaKind.java @ 23393:1d4ce2d19e52

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clean up and minimize JVMCI (JDK-8156835)
author Doug Simon <doug.simon@oracle.com>
date Thu, 12 May 2016 20:57:31 +0200
parents 4b58c92e939b
children
comparison
equal deleted inserted replaced
23392:b3a816d3b844 23393:1d4ce2d19e52
31 * {@link JavaKind#Int} for {@code int} and {@link JavaKind#Object} for all object types. A kind has 31 * {@link JavaKind#Int} for {@code int} and {@link JavaKind#Object} for all object types. A kind has
32 * a single character short name, a Java name, and a set of flags further describing its behavior. 32 * a single character short name, a Java name, and a set of flags further describing its behavior.
33 */ 33 */
34 public enum JavaKind { 34 public enum JavaKind {
35 /** The primitive boolean kind, represented as an int on the stack. */ 35 /** The primitive boolean kind, represented as an int on the stack. */
36 Boolean('z', "boolean", 1, true, java.lang.Boolean.TYPE, java.lang.Boolean.class), 36 Boolean('Z', "boolean", 1, true, java.lang.Boolean.TYPE, java.lang.Boolean.class),
37 37
38 /** The primitive byte kind, represented as an int on the stack. */ 38 /** The primitive byte kind, represented as an int on the stack. */
39 Byte('b', "byte", 1, true, java.lang.Byte.TYPE, java.lang.Byte.class), 39 Byte('B', "byte", 1, true, java.lang.Byte.TYPE, java.lang.Byte.class),
40 40
41 /** The primitive short kind, represented as an int on the stack. */ 41 /** The primitive short kind, represented as an int on the stack. */
42 Short('s', "short", 1, true, java.lang.Short.TYPE, java.lang.Short.class), 42 Short('S', "short", 1, true, java.lang.Short.TYPE, java.lang.Short.class),
43 43
44 /** The primitive char kind, represented as an int on the stack. */ 44 /** The primitive char kind, represented as an int on the stack. */
45 Char('c', "char", 1, true, java.lang.Character.TYPE, java.lang.Character.class), 45 Char('C', "char", 1, true, java.lang.Character.TYPE, java.lang.Character.class),
46 46
47 /** The primitive int kind, represented as an int on the stack. */ 47 /** The primitive int kind, represented as an int on the stack. */
48 Int('i', "int", 1, true, java.lang.Integer.TYPE, java.lang.Integer.class), 48 Int('I', "int", 1, true, java.lang.Integer.TYPE, java.lang.Integer.class),
49 49
50 /** The primitive float kind. */ 50 /** The primitive float kind. */
51 Float('f', "float", 1, false, java.lang.Float.TYPE, java.lang.Float.class), 51 Float('F', "float", 1, false, java.lang.Float.TYPE, java.lang.Float.class),
52 52
53 /** The primitive long kind. */ 53 /** The primitive long kind. */
54 Long('j', "long", 2, false, java.lang.Long.TYPE, java.lang.Long.class), 54 Long('J', "long", 2, false, java.lang.Long.TYPE, java.lang.Long.class),
55 55
56 /** The primitive double kind. */ 56 /** The primitive double kind. */
57 Double('d', "double", 2, false, java.lang.Double.TYPE, java.lang.Double.class), 57 Double('D', "double", 2, false, java.lang.Double.TYPE, java.lang.Double.class),
58 58
59 /** The Object kind, also used for arrays. */ 59 /** The Object kind, also used for arrays. */
60 Object('a', "Object", 1, false, null, null), 60 Object('A', "Object", 1, false, null, null),
61 61
62 /** The void float kind. */ 62 /** The void kind. */
63 Void('v', "void", 0, false, java.lang.Void.TYPE, java.lang.Void.class), 63 Void('V', "void", 0, false, java.lang.Void.TYPE, java.lang.Void.class),
64 64
65 /** The non-type. */ 65 /** The non-type. */
66 Illegal('-', "illegal", 0, false, null, null); 66 Illegal('-', "illegal", 0, false, null, null);
67 67
68 private final char typeChar; 68 private final char typeChar;
96 public boolean needsTwoSlots() { 96 public boolean needsTwoSlots() {
97 return this.slotCount == 2; 97 return this.slotCount == 2;
98 } 98 }
99 99
100 /** 100 /**
101 * Returns the name of the kind as a single character. 101 * Returns the name of the kind as a single upper case character. For the void and primitive
102 * kinds, this is the <i>FieldType</i> term in
103 * <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.3.2-200">
104 * table 4.3-A</a> of the JVM Specification. For {@link #Object}, the character {@code 'A'} is
105 * returned and for {@link #Illegal}, {@code '-'} is returned.
102 */ 106 */
103 public char getTypeChar() { 107 public char getTypeChar() {
104 return typeChar; 108 return typeChar;
105 } 109 }
106 110
202 } 206 }
203 207
204 /** 208 /**
205 * Returns the kind from the character describing a primitive or void. 209 * Returns the kind from the character describing a primitive or void.
206 * 210 *
207 * @param ch the character 211 * @param ch the character for a void or primitive kind as returned by {@link #getTypeChar()}
208 * @return the kind 212 * @return the kind
209 */ 213 */
210 public static JavaKind fromPrimitiveOrVoidTypeChar(char ch) { 214 public static JavaKind fromPrimitiveOrVoidTypeChar(char ch) {
211 switch (ch) { 215 switch (ch) {
212 case 'Z': 216 case 'Z':
367 } 371 }
368 return buf.append('}').toString(); 372 return buf.append('}').toString();
369 } 373 }
370 374
371 /** 375 /**
372 * The minimum value that can be represented as a value of this kind. 376 * Gets the minimum value that can be represented as a value of this kind.
373 * 377 *
374 * @return the minimum value 378 * @return the minimum value represented as a {@code long}
375 */ 379 */
376 public long getMinValue() { 380 public long getMinValue() {
377 switch (this) { 381 switch (this) {
378 case Boolean: 382 case Boolean:
379 return 0; 383 return 0;
385 return java.lang.Short.MIN_VALUE; 389 return java.lang.Short.MIN_VALUE;
386 case Int: 390 case Int:
387 return java.lang.Integer.MIN_VALUE; 391 return java.lang.Integer.MIN_VALUE;
388 case Long: 392 case Long:
389 return java.lang.Long.MIN_VALUE; 393 return java.lang.Long.MIN_VALUE;
394 case Float:
395 return java.lang.Float.floatToRawIntBits(java.lang.Float.MIN_VALUE);
396 case Double:
397 return java.lang.Double.doubleToRawLongBits(java.lang.Double.MIN_VALUE);
390 default: 398 default:
391 throw new IllegalArgumentException("illegal call to minValue on " + this); 399 throw new IllegalArgumentException("illegal call to minValue on " + this);
392 } 400 }
393 } 401 }
394 402
395 /** 403 /**
396 * The maximum value that can be represented as a value of this kind. 404 * Gets the maximum value that can be represented as a value of this kind.
397 * 405 *
398 * @return the maximum value 406 * @return the maximum value represented as a {@code long}
399 */ 407 */
400 public long getMaxValue() { 408 public long getMaxValue() {
401 switch (this) { 409 switch (this) {
402 case Boolean: 410 case Boolean:
403 return 1; 411 return 1;
409 return java.lang.Short.MAX_VALUE; 417 return java.lang.Short.MAX_VALUE;
410 case Int: 418 case Int:
411 return java.lang.Integer.MAX_VALUE; 419 return java.lang.Integer.MAX_VALUE;
412 case Long: 420 case Long:
413 return java.lang.Long.MAX_VALUE; 421 return java.lang.Long.MAX_VALUE;
422 case Float:
423 return java.lang.Float.floatToRawIntBits(java.lang.Float.MAX_VALUE);
424 case Double:
425 return java.lang.Double.doubleToRawLongBits(java.lang.Double.MAX_VALUE);
414 default: 426 default:
415 throw new IllegalArgumentException("illegal call to maxValue on " + this); 427 throw new IllegalArgumentException("illegal call to maxValue on " + this);
416 } 428 }
417 } 429 }
418 430