97 assert(char2type(0) == T_ILLEGAL, "correct illegality");
98
99 {
100 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
101 BasicType vt = (BasicType)i;
102 BasicType ft = type2field[vt];
103 switch (vt) {
104 // the following types might plausibly show up in memory layouts:
105 case T_BOOLEAN:
106 case T_BYTE:
107 case T_CHAR:
108 case T_SHORT:
109 case T_INT:
110 case T_FLOAT:
111 case T_DOUBLE:
112 case T_LONG:
113 case T_OBJECT:
114 case T_ADDRESS: // random raw pointer
115 case T_METADATA: // metadata pointer
116 case T_NARROWOOP: // compressed pointer
117 case T_CONFLICT: // might as well support a bottom type
118 case T_VOID: // padding or other unaddressed word
119 // layout type must map to itself
120 assert(vt == ft, "");
121 break;
122 default:
123 // non-layout type must map to a (different) layout type
124 assert(vt != ft, "");
125 assert(ft == type2field[ft], "");
126 }
127 // every type must map to same-sized layout type:
128 assert(type2size[vt] == type2size[ft], "");
129 }
130 }
131 // These are assumed, e.g., when filling HeapWords with juints.
132 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
133 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
134 assert((size_t)HeapWordSize >= sizeof(juint),
135 "HeapWord should be at least as large as juint");
136 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
162 if (UseCompressedOops) {
163 // Size info for oops within java objects is fixed
164 heapOopSize = jintSize;
165 LogBytesPerHeapOop = LogBytesPerInt;
166 LogBitsPerHeapOop = LogBitsPerInt;
167 BytesPerHeapOop = BytesPerInt;
168 BitsPerHeapOop = BitsPerInt;
169 } else {
170 heapOopSize = oopSize;
171 LogBytesPerHeapOop = LogBytesPerWord;
172 LogBitsPerHeapOop = LogBitsPerWord;
173 BytesPerHeapOop = BytesPerWord;
174 BitsPerHeapOop = BitsPerWord;
175 }
176 _type2aelembytes[T_OBJECT] = heapOopSize;
177 _type2aelembytes[T_ARRAY] = heapOopSize;
178 }
179
180
181 // Map BasicType to signature character
182 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0, 0};
183
184 // Map BasicType to Java type name
185 const char* type2name_tab[T_CONFLICT+1] = {
186 NULL, NULL, NULL, NULL,
187 "boolean",
188 "char",
189 "float",
190 "double",
191 "byte",
192 "short",
193 "int",
194 "long",
195 "object",
196 "array",
197 "void",
198 "*address*",
199 "*narrowoop*",
200 "*metadata*",
201 "*conflict*"
202 };
203
204
205 BasicType name2type(const char* name) {
206 for (int i = T_BOOLEAN; i <= T_VOID; i++) {
207 BasicType t = (BasicType)i;
208 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
209 return t;
210 }
211 return T_ILLEGAL;
212 }
213
214
215 // Map BasicType to size in words
216 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, -1};
217
218 BasicType type2field[T_CONFLICT+1] = {
219 (BasicType)0, // 0,
220 (BasicType)0, // 1,
221 (BasicType)0, // 2,
222 (BasicType)0, // 3,
223 T_BOOLEAN, // T_BOOLEAN = 4,
224 T_CHAR, // T_CHAR = 5,
225 T_FLOAT, // T_FLOAT = 6,
226 T_DOUBLE, // T_DOUBLE = 7,
227 T_BYTE, // T_BYTE = 8,
228 T_SHORT, // T_SHORT = 9,
229 T_INT, // T_INT = 10,
230 T_LONG, // T_LONG = 11,
231 T_OBJECT, // T_OBJECT = 12,
232 T_OBJECT, // T_ARRAY = 13,
233 T_VOID, // T_VOID = 14,
234 T_ADDRESS, // T_ADDRESS = 15,
235 T_NARROWOOP, // T_NARROWOOP= 16,
236 T_METADATA, // T_METADATA = 17,
237 T_CONFLICT // T_CONFLICT = 18,
238 };
239
240
241 BasicType type2wfield[T_CONFLICT+1] = {
242 (BasicType)0, // 0,
243 (BasicType)0, // 1,
244 (BasicType)0, // 2,
245 (BasicType)0, // 3,
246 T_INT, // T_BOOLEAN = 4,
247 T_INT, // T_CHAR = 5,
248 T_FLOAT, // T_FLOAT = 6,
249 T_DOUBLE, // T_DOUBLE = 7,
250 T_INT, // T_BYTE = 8,
251 T_INT, // T_SHORT = 9,
252 T_INT, // T_INT = 10,
253 T_LONG, // T_LONG = 11,
254 T_OBJECT, // T_OBJECT = 12,
255 T_OBJECT, // T_ARRAY = 13,
256 T_VOID, // T_VOID = 14,
257 T_ADDRESS, // T_ADDRESS = 15,
258 T_NARROWOOP, // T_NARROWOOP = 16,
259 T_METADATA, // T_METADATA = 17,
260 T_CONFLICT // T_CONFLICT = 18,
261 };
262
263
264 int _type2aelembytes[T_CONFLICT+1] = {
265 0, // 0
266 0, // 1
267 0, // 2
268 0, // 3
269 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4,
270 T_CHAR_aelem_bytes, // T_CHAR = 5,
271 T_FLOAT_aelem_bytes, // T_FLOAT = 6,
272 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7,
273 T_BYTE_aelem_bytes, // T_BYTE = 8,
274 T_SHORT_aelem_bytes, // T_SHORT = 9,
275 T_INT_aelem_bytes, // T_INT = 10,
276 T_LONG_aelem_bytes, // T_LONG = 11,
277 T_OBJECT_aelem_bytes, // T_OBJECT = 12,
278 T_ARRAY_aelem_bytes, // T_ARRAY = 13,
279 0, // T_VOID = 14,
280 T_OBJECT_aelem_bytes, // T_ADDRESS = 15,
281 T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16,
282 T_OBJECT_aelem_bytes, // T_METADATA = 17,
283 0 // T_CONFLICT = 18,
284 };
285
286 #ifdef ASSERT
287 int type2aelembytes(BasicType t, bool allow_address) {
288 assert(allow_address || t != T_ADDRESS, " ");
289 return _type2aelembytes[t];
290 }
291 #endif
292
293 // Support for 64-bit integer arithmetic
294
295 // The following code is mostly taken from JVM typedefs_md.h and system_md.c
296
297 static const jlong high_bit = (jlong)1 << (jlong)63;
298 static const jlong other_bits = ~high_bit;
299
300 jlong float2long(jfloat f) {
301 jlong tmp = (jlong) f;
302 if (tmp != high_bit) {
303 return tmp;
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97 assert(char2type(0) == T_ILLEGAL, "correct illegality");
98
99 {
100 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
101 BasicType vt = (BasicType)i;
102 BasicType ft = type2field[vt];
103 switch (vt) {
104 // the following types might plausibly show up in memory layouts:
105 case T_BOOLEAN:
106 case T_BYTE:
107 case T_CHAR:
108 case T_SHORT:
109 case T_INT:
110 case T_FLOAT:
111 case T_DOUBLE:
112 case T_LONG:
113 case T_OBJECT:
114 case T_ADDRESS: // random raw pointer
115 case T_METADATA: // metadata pointer
116 case T_NARROWOOP: // compressed pointer
117 case T_NARROWKLASS: // compressed klass pointer
118 case T_CONFLICT: // might as well support a bottom type
119 case T_VOID: // padding or other unaddressed word
120 // layout type must map to itself
121 assert(vt == ft, "");
122 break;
123 default:
124 // non-layout type must map to a (different) layout type
125 assert(vt != ft, "");
126 assert(ft == type2field[ft], "");
127 }
128 // every type must map to same-sized layout type:
129 assert(type2size[vt] == type2size[ft], "");
130 }
131 }
132 // These are assumed, e.g., when filling HeapWords with juints.
133 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
134 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
135 assert((size_t)HeapWordSize >= sizeof(juint),
136 "HeapWord should be at least as large as juint");
137 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
163 if (UseCompressedOops) {
164 // Size info for oops within java objects is fixed
165 heapOopSize = jintSize;
166 LogBytesPerHeapOop = LogBytesPerInt;
167 LogBitsPerHeapOop = LogBitsPerInt;
168 BytesPerHeapOop = BytesPerInt;
169 BitsPerHeapOop = BitsPerInt;
170 } else {
171 heapOopSize = oopSize;
172 LogBytesPerHeapOop = LogBytesPerWord;
173 LogBitsPerHeapOop = LogBitsPerWord;
174 BytesPerHeapOop = BytesPerWord;
175 BitsPerHeapOop = BitsPerWord;
176 }
177 _type2aelembytes[T_OBJECT] = heapOopSize;
178 _type2aelembytes[T_ARRAY] = heapOopSize;
179 }
180
181
182 // Map BasicType to signature character
183 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0, 0, 0};
184
185 // Map BasicType to Java type name
186 const char* type2name_tab[T_CONFLICT+1] = {
187 NULL, NULL, NULL, NULL,
188 "boolean",
189 "char",
190 "float",
191 "double",
192 "byte",
193 "short",
194 "int",
195 "long",
196 "object",
197 "array",
198 "void",
199 "*address*",
200 "*narrowoop*",
201 "*metadata*",
202 "*narrowklass*",
203 "*conflict*"
204 };
205
206
207 BasicType name2type(const char* name) {
208 for (int i = T_BOOLEAN; i <= T_VOID; i++) {
209 BasicType t = (BasicType)i;
210 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
211 return t;
212 }
213 return T_ILLEGAL;
214 }
215
216
217 // Map BasicType to size in words
218 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, 1, -1};
219
220 BasicType type2field[T_CONFLICT+1] = {
221 (BasicType)0, // 0,
222 (BasicType)0, // 1,
223 (BasicType)0, // 2,
224 (BasicType)0, // 3,
225 T_BOOLEAN, // T_BOOLEAN = 4,
226 T_CHAR, // T_CHAR = 5,
227 T_FLOAT, // T_FLOAT = 6,
228 T_DOUBLE, // T_DOUBLE = 7,
229 T_BYTE, // T_BYTE = 8,
230 T_SHORT, // T_SHORT = 9,
231 T_INT, // T_INT = 10,
232 T_LONG, // T_LONG = 11,
233 T_OBJECT, // T_OBJECT = 12,
234 T_OBJECT, // T_ARRAY = 13,
235 T_VOID, // T_VOID = 14,
236 T_ADDRESS, // T_ADDRESS = 15,
237 T_NARROWOOP, // T_NARROWOOP= 16,
238 T_METADATA, // T_METADATA = 17,
239 T_NARROWKLASS, // T_NARROWKLASS = 18,
240 T_CONFLICT // T_CONFLICT = 19,
241 };
242
243
244 BasicType type2wfield[T_CONFLICT+1] = {
245 (BasicType)0, // 0,
246 (BasicType)0, // 1,
247 (BasicType)0, // 2,
248 (BasicType)0, // 3,
249 T_INT, // T_BOOLEAN = 4,
250 T_INT, // T_CHAR = 5,
251 T_FLOAT, // T_FLOAT = 6,
252 T_DOUBLE, // T_DOUBLE = 7,
253 T_INT, // T_BYTE = 8,
254 T_INT, // T_SHORT = 9,
255 T_INT, // T_INT = 10,
256 T_LONG, // T_LONG = 11,
257 T_OBJECT, // T_OBJECT = 12,
258 T_OBJECT, // T_ARRAY = 13,
259 T_VOID, // T_VOID = 14,
260 T_ADDRESS, // T_ADDRESS = 15,
261 T_NARROWOOP, // T_NARROWOOP = 16,
262 T_METADATA, // T_METADATA = 17,
263 T_NARROWKLASS, // T_NARROWKLASS = 18,
264 T_CONFLICT // T_CONFLICT = 19,
265 };
266
267
268 int _type2aelembytes[T_CONFLICT+1] = {
269 0, // 0
270 0, // 1
271 0, // 2
272 0, // 3
273 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4,
274 T_CHAR_aelem_bytes, // T_CHAR = 5,
275 T_FLOAT_aelem_bytes, // T_FLOAT = 6,
276 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7,
277 T_BYTE_aelem_bytes, // T_BYTE = 8,
278 T_SHORT_aelem_bytes, // T_SHORT = 9,
279 T_INT_aelem_bytes, // T_INT = 10,
280 T_LONG_aelem_bytes, // T_LONG = 11,
281 T_OBJECT_aelem_bytes, // T_OBJECT = 12,
282 T_ARRAY_aelem_bytes, // T_ARRAY = 13,
283 0, // T_VOID = 14,
284 T_OBJECT_aelem_bytes, // T_ADDRESS = 15,
285 T_NARROWOOP_aelem_bytes, // T_NARROWOOP= 16,
286 T_OBJECT_aelem_bytes, // T_METADATA = 17,
287 T_NARROWKLASS_aelem_bytes, // T_NARROWKLASS= 18,
288 0 // T_CONFLICT = 19,
289 };
290
291 #ifdef ASSERT
292 int type2aelembytes(BasicType t, bool allow_address) {
293 assert(allow_address || t != T_ADDRESS, " ");
294 return _type2aelembytes[t];
295 }
296 #endif
297
298 // Support for 64-bit integer arithmetic
299
300 // The following code is mostly taken from JVM typedefs_md.h and system_md.c
301
302 static const jlong high_bit = (jlong)1 << (jlong)63;
303 static const jlong other_bits = ~high_bit;
304
305 jlong float2long(jfloat f) {
306 jlong tmp = (jlong) f;
307 if (tmp != high_bit) {
308 return tmp;
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