Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.cpp @ 1905:ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
Reviewed-by: kvn, twisti
author | never |
---|---|
date | Tue, 19 Oct 2010 16:14:34 -0700 |
parents | e9ff18c4ace7 |
children | f95d63e2154a |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_globalDefinitions.cpp.incl" | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
27 // Basic error support |
0 | 28 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
29 // Info for oops within a java object. Defaults are zero so |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
30 // things will break badly if incorrectly initialized. |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
31 int heapOopSize = 0; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
32 int LogBytesPerHeapOop = 0; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
33 int LogBitsPerHeapOop = 0; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
34 int BytesPerHeapOop = 0; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
35 int BitsPerHeapOop = 0; |
0 | 36 |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
37 // Object alignment, in units of HeapWords. |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
38 // Defaults are -1 so things will break badly if incorrectly initialized. |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
39 int MinObjAlignment = -1; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
40 int MinObjAlignmentInBytes = -1; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
41 int MinObjAlignmentInBytesMask = 0; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
42 |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
43 int LogMinObjAlignment = -1; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
44 int LogMinObjAlignmentInBytes = -1; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
45 |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
46 // Oop encoding heap max |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
47 uint64_t OopEncodingHeapMax = 0; |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
48 |
0 | 49 void basic_fatal(const char* msg) { |
50 fatal(msg); | |
51 } | |
52 | |
53 // Something to help porters sleep at night | |
54 | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
55 void basic_types_init() { |
0 | 56 #ifdef ASSERT |
57 #ifdef _LP64 | |
58 assert(min_intx == (intx)CONST64(0x8000000000000000), "correct constant"); | |
59 assert(max_intx == CONST64(0x7FFFFFFFFFFFFFFF), "correct constant"); | |
60 assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant"); | |
61 assert( 8 == sizeof( intx), "wrong size for basic type"); | |
62 assert( 8 == sizeof( jobject), "wrong size for basic type"); | |
63 #else | |
64 assert(min_intx == (intx)0x80000000, "correct constant"); | |
65 assert(max_intx == 0x7FFFFFFF, "correct constant"); | |
66 assert(max_uintx == 0xFFFFFFFF, "correct constant"); | |
67 assert( 4 == sizeof( intx), "wrong size for basic type"); | |
68 assert( 4 == sizeof( jobject), "wrong size for basic type"); | |
69 #endif | |
70 assert( (~max_juint) == 0, "max_juint has all its bits"); | |
71 assert( (~max_uintx) == 0, "max_uintx has all its bits"); | |
72 assert( (~max_julong) == 0, "max_julong has all its bits"); | |
73 assert( 1 == sizeof( jbyte), "wrong size for basic type"); | |
74 assert( 2 == sizeof( jchar), "wrong size for basic type"); | |
75 assert( 2 == sizeof( jshort), "wrong size for basic type"); | |
76 assert( 4 == sizeof( juint), "wrong size for basic type"); | |
77 assert( 4 == sizeof( jint), "wrong size for basic type"); | |
78 assert( 1 == sizeof( jboolean), "wrong size for basic type"); | |
79 assert( 8 == sizeof( jlong), "wrong size for basic type"); | |
80 assert( 4 == sizeof( jfloat), "wrong size for basic type"); | |
81 assert( 8 == sizeof( jdouble), "wrong size for basic type"); | |
82 assert( 1 == sizeof( u1), "wrong size for basic type"); | |
83 assert( 2 == sizeof( u2), "wrong size for basic type"); | |
84 assert( 4 == sizeof( u4), "wrong size for basic type"); | |
85 | |
86 int num_type_chars = 0; | |
87 for (int i = 0; i < 99; i++) { | |
88 if (type2char((BasicType)i) != 0) { | |
89 assert(char2type(type2char((BasicType)i)) == i, "proper inverses"); | |
90 num_type_chars++; | |
91 } | |
92 } | |
93 assert(num_type_chars == 11, "must have tested the right number of mappings"); | |
94 assert(char2type(0) == T_ILLEGAL, "correct illegality"); | |
95 | |
96 { | |
97 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
98 BasicType vt = (BasicType)i; | |
99 BasicType ft = type2field[vt]; | |
100 switch (vt) { | |
101 // the following types might plausibly show up in memory layouts: | |
102 case T_BOOLEAN: | |
103 case T_BYTE: | |
104 case T_CHAR: | |
105 case T_SHORT: | |
106 case T_INT: | |
107 case T_FLOAT: | |
108 case T_DOUBLE: | |
109 case T_LONG: | |
110 case T_OBJECT: | |
111 case T_ADDRESS: // random raw pointer | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
112 case T_NARROWOOP: // compressed pointer |
0 | 113 case T_CONFLICT: // might as well support a bottom type |
114 case T_VOID: // padding or other unaddressed word | |
115 // layout type must map to itself | |
116 assert(vt == ft, ""); | |
117 break; | |
118 default: | |
119 // non-layout type must map to a (different) layout type | |
120 assert(vt != ft, ""); | |
121 assert(ft == type2field[ft], ""); | |
122 } | |
123 // every type must map to same-sized layout type: | |
124 assert(type2size[vt] == type2size[ft], ""); | |
125 } | |
126 } | |
127 // These are assumed, e.g., when filling HeapWords with juints. | |
128 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2"); | |
129 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2"); | |
130 assert((size_t)HeapWordSize >= sizeof(juint), | |
131 "HeapWord should be at least as large as juint"); | |
132 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer"); | |
133 #endif | |
134 | |
135 if( JavaPriority1_To_OSPriority != -1 ) | |
136 os::java_to_os_priority[1] = JavaPriority1_To_OSPriority; | |
137 if( JavaPriority2_To_OSPriority != -1 ) | |
138 os::java_to_os_priority[2] = JavaPriority2_To_OSPriority; | |
139 if( JavaPriority3_To_OSPriority != -1 ) | |
140 os::java_to_os_priority[3] = JavaPriority3_To_OSPriority; | |
141 if( JavaPriority4_To_OSPriority != -1 ) | |
142 os::java_to_os_priority[4] = JavaPriority4_To_OSPriority; | |
143 if( JavaPriority5_To_OSPriority != -1 ) | |
144 os::java_to_os_priority[5] = JavaPriority5_To_OSPriority; | |
145 if( JavaPriority6_To_OSPriority != -1 ) | |
146 os::java_to_os_priority[6] = JavaPriority6_To_OSPriority; | |
147 if( JavaPriority7_To_OSPriority != -1 ) | |
148 os::java_to_os_priority[7] = JavaPriority7_To_OSPriority; | |
149 if( JavaPriority8_To_OSPriority != -1 ) | |
150 os::java_to_os_priority[8] = JavaPriority8_To_OSPriority; | |
151 if( JavaPriority9_To_OSPriority != -1 ) | |
152 os::java_to_os_priority[9] = JavaPriority9_To_OSPriority; | |
153 if(JavaPriority10_To_OSPriority != -1 ) | |
154 os::java_to_os_priority[10] = JavaPriority10_To_OSPriority; | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
155 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
156 // Set the size of basic types here (after argument parsing but before |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
157 // stub generation). |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
158 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
159 // Size info for oops within java objects is fixed |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
160 heapOopSize = jintSize; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
161 LogBytesPerHeapOop = LogBytesPerInt; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
162 LogBitsPerHeapOop = LogBitsPerInt; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
163 BytesPerHeapOop = BytesPerInt; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
164 BitsPerHeapOop = BitsPerInt; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
165 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
166 heapOopSize = oopSize; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
167 LogBytesPerHeapOop = LogBytesPerWord; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
168 LogBitsPerHeapOop = LogBitsPerWord; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
169 BytesPerHeapOop = BytesPerWord; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
170 BitsPerHeapOop = BitsPerWord; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
171 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
172 _type2aelembytes[T_OBJECT] = heapOopSize; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
173 _type2aelembytes[T_ARRAY] = heapOopSize; |
0 | 174 } |
175 | |
176 | |
177 // Map BasicType to signature character | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
178 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0}; |
0 | 179 |
180 // Map BasicType to Java type name | |
181 const char* type2name_tab[T_CONFLICT+1] = { | |
182 NULL, NULL, NULL, NULL, | |
183 "boolean", | |
184 "char", | |
185 "float", | |
186 "double", | |
187 "byte", | |
188 "short", | |
189 "int", | |
190 "long", | |
191 "object", | |
192 "array", | |
193 "void", | |
194 "*address*", | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
195 "*narrowoop*", |
0 | 196 "*conflict*" |
197 }; | |
198 | |
199 | |
200 BasicType name2type(const char* name) { | |
201 for (int i = T_BOOLEAN; i <= T_VOID; i++) { | |
202 BasicType t = (BasicType)i; | |
203 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name)) | |
204 return t; | |
205 } | |
206 return T_ILLEGAL; | |
207 } | |
208 | |
209 | |
210 // Map BasicType to size in words | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
211 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1}; |
0 | 212 |
213 BasicType type2field[T_CONFLICT+1] = { | |
214 (BasicType)0, // 0, | |
215 (BasicType)0, // 1, | |
216 (BasicType)0, // 2, | |
217 (BasicType)0, // 3, | |
218 T_BOOLEAN, // T_BOOLEAN = 4, | |
219 T_CHAR, // T_CHAR = 5, | |
220 T_FLOAT, // T_FLOAT = 6, | |
221 T_DOUBLE, // T_DOUBLE = 7, | |
222 T_BYTE, // T_BYTE = 8, | |
223 T_SHORT, // T_SHORT = 9, | |
224 T_INT, // T_INT = 10, | |
225 T_LONG, // T_LONG = 11, | |
226 T_OBJECT, // T_OBJECT = 12, | |
227 T_OBJECT, // T_ARRAY = 13, | |
228 T_VOID, // T_VOID = 14, | |
229 T_ADDRESS, // T_ADDRESS = 15, | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
230 T_NARROWOOP, // T_NARROWOOP= 16, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
231 T_CONFLICT // T_CONFLICT = 17, |
0 | 232 }; |
233 | |
234 | |
235 BasicType type2wfield[T_CONFLICT+1] = { | |
236 (BasicType)0, // 0, | |
237 (BasicType)0, // 1, | |
238 (BasicType)0, // 2, | |
239 (BasicType)0, // 3, | |
240 T_INT, // T_BOOLEAN = 4, | |
241 T_INT, // T_CHAR = 5, | |
242 T_FLOAT, // T_FLOAT = 6, | |
243 T_DOUBLE, // T_DOUBLE = 7, | |
244 T_INT, // T_BYTE = 8, | |
245 T_INT, // T_SHORT = 9, | |
246 T_INT, // T_INT = 10, | |
247 T_LONG, // T_LONG = 11, | |
248 T_OBJECT, // T_OBJECT = 12, | |
249 T_OBJECT, // T_ARRAY = 13, | |
250 T_VOID, // T_VOID = 14, | |
251 T_ADDRESS, // T_ADDRESS = 15, | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
252 T_NARROWOOP, // T_NARROWOOP = 16, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
253 T_CONFLICT // T_CONFLICT = 17, |
0 | 254 }; |
255 | |
256 | |
29
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
257 int _type2aelembytes[T_CONFLICT+1] = { |
0 | 258 0, // 0 |
259 0, // 1 | |
260 0, // 2 | |
261 0, // 3 | |
262 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4, | |
263 T_CHAR_aelem_bytes, // T_CHAR = 5, | |
264 T_FLOAT_aelem_bytes, // T_FLOAT = 6, | |
265 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7, | |
266 T_BYTE_aelem_bytes, // T_BYTE = 8, | |
267 T_SHORT_aelem_bytes, // T_SHORT = 9, | |
268 T_INT_aelem_bytes, // T_INT = 10, | |
269 T_LONG_aelem_bytes, // T_LONG = 11, | |
270 T_OBJECT_aelem_bytes, // T_OBJECT = 12, | |
271 T_ARRAY_aelem_bytes, // T_ARRAY = 13, | |
272 0, // T_VOID = 14, | |
29
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
273 T_OBJECT_aelem_bytes, // T_ADDRESS = 15, |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
274 T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
275 0 // T_CONFLICT = 17, |
0 | 276 }; |
277 | |
29
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
278 #ifdef ASSERT |
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
279 int type2aelembytes(BasicType t, bool allow_address) { |
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
280 assert(allow_address || t != T_ADDRESS, " "); |
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
281 return _type2aelembytes[t]; |
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
282 } |
d5fc211aea19
6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
parents:
0
diff
changeset
|
283 #endif |
0 | 284 |
285 // Support for 64-bit integer arithmetic | |
286 | |
287 // The following code is mostly taken from JVM typedefs_md.h and system_md.c | |
288 | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
289 static const jlong high_bit = (jlong)1 << (jlong)63; |
0 | 290 static const jlong other_bits = ~high_bit; |
291 | |
292 jlong float2long(jfloat f) { | |
293 jlong tmp = (jlong) f; | |
294 if (tmp != high_bit) { | |
295 return tmp; | |
296 } else { | |
297 if (g_isnan((jdouble)f)) { | |
298 return 0; | |
299 } | |
300 if (f < 0) { | |
301 return high_bit; | |
302 } else { | |
303 return other_bits; | |
304 } | |
305 } | |
306 } | |
307 | |
308 | |
309 jlong double2long(jdouble f) { | |
310 jlong tmp = (jlong) f; | |
311 if (tmp != high_bit) { | |
312 return tmp; | |
313 } else { | |
314 if (g_isnan(f)) { | |
315 return 0; | |
316 } | |
317 if (f < 0) { | |
318 return high_bit; | |
319 } else { | |
320 return other_bits; | |
321 } | |
322 } | |
323 } | |
324 | |
325 // least common multiple | |
326 size_t lcm(size_t a, size_t b) { | |
327 size_t cur, div, next; | |
328 | |
329 cur = MAX2(a, b); | |
330 div = MIN2(a, b); | |
331 | |
332 assert(div != 0, "lcm requires positive arguments"); | |
333 | |
334 | |
335 while ((next = cur % div) != 0) { | |
336 cur = div; div = next; | |
337 } | |
338 | |
339 | |
340 julong result = julong(a) * b / div; | |
341 assert(result <= (size_t)max_uintx, "Integer overflow in lcm"); | |
342 | |
343 return size_t(result); | |
344 } |