Mercurial > hg > truffle
annotate src/cpu/x86/vm/vm_version_x86.cpp @ 8654:3bbad4ec6510
new phase: PushNodesThroughPi
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 04 Apr 2013 16:03:08 +0200 |
parents | 3ac7d10a6572 |
children | 6b0fd0964b87 |
rev | line source |
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585 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
585 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
585 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "memory/resourceArea.hpp" |
29 #include "runtime/java.hpp" | |
30 #include "runtime/stubCodeGenerator.hpp" | |
31 #include "vm_version_x86.hpp" | |
32 #ifdef TARGET_OS_FAMILY_linux | |
33 # include "os_linux.inline.hpp" | |
34 #endif | |
35 #ifdef TARGET_OS_FAMILY_solaris | |
36 # include "os_solaris.inline.hpp" | |
37 #endif | |
38 #ifdef TARGET_OS_FAMILY_windows | |
39 # include "os_windows.inline.hpp" | |
40 #endif | |
3960 | 41 #ifdef TARGET_OS_FAMILY_bsd |
42 # include "os_bsd.inline.hpp" | |
43 #endif | |
585 | 44 |
45 | |
46 int VM_Version::_cpu; | |
47 int VM_Version::_model; | |
48 int VM_Version::_stepping; | |
49 int VM_Version::_cpuFeatures; | |
50 const char* VM_Version::_features_str = ""; | |
51 VM_Version::CpuidInfo VM_Version::_cpuid_info = { 0, }; | |
52 | |
53 static BufferBlob* stub_blob; | |
4771 | 54 static const int stub_size = 550; |
585 | 55 |
56 extern "C" { | |
57 typedef void (*getPsrInfo_stub_t)(void*); | |
58 } | |
59 static getPsrInfo_stub_t getPsrInfo_stub = NULL; | |
60 | |
61 | |
62 class VM_Version_StubGenerator: public StubCodeGenerator { | |
63 public: | |
64 | |
65 VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {} | |
66 | |
67 address generate_getPsrInfo() { | |
68 // Flags to test CPU type. | |
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69 const uint32_t HS_EFL_AC = 0x40000; |
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70 const uint32_t HS_EFL_ID = 0x200000; |
585 | 71 // Values for when we don't have a CPUID instruction. |
72 const int CPU_FAMILY_SHIFT = 8; | |
73 const uint32_t CPU_FAMILY_386 = (3 << CPU_FAMILY_SHIFT); | |
74 const uint32_t CPU_FAMILY_486 = (4 << CPU_FAMILY_SHIFT); | |
75 | |
1622 | 76 Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4; |
4771 | 77 Label sef_cpuid, ext_cpuid, ext_cpuid1, ext_cpuid5, ext_cpuid7, done; |
585 | 78 |
79 StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub"); | |
80 # define __ _masm-> | |
81 | |
82 address start = __ pc(); | |
83 | |
84 // | |
85 // void getPsrInfo(VM_Version::CpuidInfo* cpuid_info); | |
86 // | |
87 // LP64: rcx and rdx are first and second argument registers on windows | |
88 | |
89 __ push(rbp); | |
90 #ifdef _LP64 | |
91 __ mov(rbp, c_rarg0); // cpuid_info address | |
92 #else | |
93 __ movptr(rbp, Address(rsp, 8)); // cpuid_info address | |
94 #endif | |
95 __ push(rbx); | |
96 __ push(rsi); | |
97 __ pushf(); // preserve rbx, and flags | |
98 __ pop(rax); | |
99 __ push(rax); | |
100 __ mov(rcx, rax); | |
101 // | |
102 // if we are unable to change the AC flag, we have a 386 | |
103 // | |
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104 __ xorl(rax, HS_EFL_AC); |
585 | 105 __ push(rax); |
106 __ popf(); | |
107 __ pushf(); | |
108 __ pop(rax); | |
109 __ cmpptr(rax, rcx); | |
110 __ jccb(Assembler::notEqual, detect_486); | |
111 | |
112 __ movl(rax, CPU_FAMILY_386); | |
113 __ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax); | |
114 __ jmp(done); | |
115 | |
116 // | |
117 // If we are unable to change the ID flag, we have a 486 which does | |
118 // not support the "cpuid" instruction. | |
119 // | |
120 __ bind(detect_486); | |
121 __ mov(rax, rcx); | |
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122 __ xorl(rax, HS_EFL_ID); |
585 | 123 __ push(rax); |
124 __ popf(); | |
125 __ pushf(); | |
126 __ pop(rax); | |
127 __ cmpptr(rcx, rax); | |
128 __ jccb(Assembler::notEqual, detect_586); | |
129 | |
130 __ bind(cpu486); | |
131 __ movl(rax, CPU_FAMILY_486); | |
132 __ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax); | |
133 __ jmp(done); | |
134 | |
135 // | |
136 // At this point, we have a chip which supports the "cpuid" instruction | |
137 // | |
138 __ bind(detect_586); | |
139 __ xorl(rax, rax); | |
140 __ cpuid(); | |
141 __ orl(rax, rax); | |
142 __ jcc(Assembler::equal, cpu486); // if cpuid doesn't support an input | |
143 // value of at least 1, we give up and | |
144 // assume a 486 | |
145 __ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); | |
146 __ movl(Address(rsi, 0), rax); | |
147 __ movl(Address(rsi, 4), rbx); | |
148 __ movl(Address(rsi, 8), rcx); | |
149 __ movl(Address(rsi,12), rdx); | |
150 | |
1622 | 151 __ cmpl(rax, 0xa); // Is cpuid(0xB) supported? |
152 __ jccb(Assembler::belowEqual, std_cpuid4); | |
153 | |
154 // | |
155 // cpuid(0xB) Processor Topology | |
156 // | |
157 __ movl(rax, 0xb); | |
158 __ xorl(rcx, rcx); // Threads level | |
159 __ cpuid(); | |
160 | |
161 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB0_offset()))); | |
162 __ movl(Address(rsi, 0), rax); | |
163 __ movl(Address(rsi, 4), rbx); | |
164 __ movl(Address(rsi, 8), rcx); | |
165 __ movl(Address(rsi,12), rdx); | |
166 | |
167 __ movl(rax, 0xb); | |
168 __ movl(rcx, 1); // Cores level | |
169 __ cpuid(); | |
170 __ push(rax); | |
171 __ andl(rax, 0x1f); // Determine if valid topology level | |
172 __ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level | |
173 __ andl(rax, 0xffff); | |
174 __ pop(rax); | |
175 __ jccb(Assembler::equal, std_cpuid4); | |
176 | |
177 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB1_offset()))); | |
178 __ movl(Address(rsi, 0), rax); | |
179 __ movl(Address(rsi, 4), rbx); | |
180 __ movl(Address(rsi, 8), rcx); | |
181 __ movl(Address(rsi,12), rdx); | |
182 | |
183 __ movl(rax, 0xb); | |
184 __ movl(rcx, 2); // Packages level | |
185 __ cpuid(); | |
186 __ push(rax); | |
187 __ andl(rax, 0x1f); // Determine if valid topology level | |
188 __ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level | |
189 __ andl(rax, 0xffff); | |
190 __ pop(rax); | |
191 __ jccb(Assembler::equal, std_cpuid4); | |
192 | |
193 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB2_offset()))); | |
194 __ movl(Address(rsi, 0), rax); | |
195 __ movl(Address(rsi, 4), rbx); | |
196 __ movl(Address(rsi, 8), rcx); | |
197 __ movl(Address(rsi,12), rdx); | |
585 | 198 |
199 // | |
200 // cpuid(0x4) Deterministic cache params | |
201 // | |
1622 | 202 __ bind(std_cpuid4); |
585 | 203 __ movl(rax, 4); |
1622 | 204 __ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x4) supported? |
205 __ jccb(Assembler::greater, std_cpuid1); | |
206 | |
585 | 207 __ xorl(rcx, rcx); // L1 cache |
208 __ cpuid(); | |
209 __ push(rax); | |
210 __ andl(rax, 0x1f); // Determine if valid cache parameters used | |
211 __ orl(rax, rax); // eax[4:0] == 0 indicates invalid cache | |
212 __ pop(rax); | |
213 __ jccb(Assembler::equal, std_cpuid1); | |
214 | |
215 __ lea(rsi, Address(rbp, in_bytes(VM_Version::dcp_cpuid4_offset()))); | |
216 __ movl(Address(rsi, 0), rax); | |
217 __ movl(Address(rsi, 4), rbx); | |
218 __ movl(Address(rsi, 8), rcx); | |
219 __ movl(Address(rsi,12), rdx); | |
220 | |
221 // | |
222 // Standard cpuid(0x1) | |
223 // | |
224 __ bind(std_cpuid1); | |
225 __ movl(rax, 1); | |
226 __ cpuid(); | |
227 __ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid1_offset()))); | |
228 __ movl(Address(rsi, 0), rax); | |
229 __ movl(Address(rsi, 4), rbx); | |
230 __ movl(Address(rsi, 8), rcx); | |
231 __ movl(Address(rsi,12), rdx); | |
232 | |
4759 | 233 // |
234 // Check if OS has enabled XGETBV instruction to access XCR0 | |
235 // (OSXSAVE feature flag) and CPU supports AVX | |
236 // | |
237 __ andl(rcx, 0x18000000); | |
238 __ cmpl(rcx, 0x18000000); | |
239 __ jccb(Assembler::notEqual, sef_cpuid); | |
240 | |
241 // | |
242 // XCR0, XFEATURE_ENABLED_MASK register | |
243 // | |
244 __ xorl(rcx, rcx); // zero for XCR0 register | |
245 __ xgetbv(); | |
246 __ lea(rsi, Address(rbp, in_bytes(VM_Version::xem_xcr0_offset()))); | |
247 __ movl(Address(rsi, 0), rax); | |
248 __ movl(Address(rsi, 4), rdx); | |
249 | |
250 // | |
251 // cpuid(0x7) Structured Extended Features | |
252 // | |
253 __ bind(sef_cpuid); | |
254 __ movl(rax, 7); | |
255 __ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x7) supported? | |
256 __ jccb(Assembler::greater, ext_cpuid); | |
257 | |
258 __ xorl(rcx, rcx); | |
259 __ cpuid(); | |
260 __ lea(rsi, Address(rbp, in_bytes(VM_Version::sef_cpuid7_offset()))); | |
261 __ movl(Address(rsi, 0), rax); | |
262 __ movl(Address(rsi, 4), rbx); | |
263 | |
264 // | |
265 // Extended cpuid(0x80000000) | |
266 // | |
267 __ bind(ext_cpuid); | |
585 | 268 __ movl(rax, 0x80000000); |
269 __ cpuid(); | |
270 __ cmpl(rax, 0x80000000); // Is cpuid(0x80000001) supported? | |
271 __ jcc(Assembler::belowEqual, done); | |
272 __ cmpl(rax, 0x80000004); // Is cpuid(0x80000005) supported? | |
273 __ jccb(Assembler::belowEqual, ext_cpuid1); | |
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274 __ cmpl(rax, 0x80000006); // Is cpuid(0x80000007) supported? |
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275 __ jccb(Assembler::belowEqual, ext_cpuid5); |
585 | 276 __ cmpl(rax, 0x80000007); // Is cpuid(0x80000008) supported? |
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277 __ jccb(Assembler::belowEqual, ext_cpuid7); |
585 | 278 // |
279 // Extended cpuid(0x80000008) | |
280 // | |
281 __ movl(rax, 0x80000008); | |
282 __ cpuid(); | |
283 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid8_offset()))); | |
284 __ movl(Address(rsi, 0), rax); | |
285 __ movl(Address(rsi, 4), rbx); | |
286 __ movl(Address(rsi, 8), rcx); | |
287 __ movl(Address(rsi,12), rdx); | |
288 | |
289 // | |
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290 // Extended cpuid(0x80000007) |
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291 // |
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292 __ bind(ext_cpuid7); |
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293 __ movl(rax, 0x80000007); |
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294 __ cpuid(); |
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295 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid7_offset()))); |
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296 __ movl(Address(rsi, 0), rax); |
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297 __ movl(Address(rsi, 4), rbx); |
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298 __ movl(Address(rsi, 8), rcx); |
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299 __ movl(Address(rsi,12), rdx); |
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300 |
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301 // |
585 | 302 // Extended cpuid(0x80000005) |
303 // | |
304 __ bind(ext_cpuid5); | |
305 __ movl(rax, 0x80000005); | |
306 __ cpuid(); | |
307 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid5_offset()))); | |
308 __ movl(Address(rsi, 0), rax); | |
309 __ movl(Address(rsi, 4), rbx); | |
310 __ movl(Address(rsi, 8), rcx); | |
311 __ movl(Address(rsi,12), rdx); | |
312 | |
313 // | |
314 // Extended cpuid(0x80000001) | |
315 // | |
316 __ bind(ext_cpuid1); | |
317 __ movl(rax, 0x80000001); | |
318 __ cpuid(); | |
319 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid1_offset()))); | |
320 __ movl(Address(rsi, 0), rax); | |
321 __ movl(Address(rsi, 4), rbx); | |
322 __ movl(Address(rsi, 8), rcx); | |
323 __ movl(Address(rsi,12), rdx); | |
324 | |
325 // | |
326 // return | |
327 // | |
328 __ bind(done); | |
329 __ popf(); | |
330 __ pop(rsi); | |
331 __ pop(rbx); | |
332 __ pop(rbp); | |
333 __ ret(0); | |
334 | |
335 # undef __ | |
336 | |
337 return start; | |
338 }; | |
339 }; | |
340 | |
341 | |
342 void VM_Version::get_processor_features() { | |
343 | |
344 _cpu = 4; // 486 by default | |
345 _model = 0; | |
346 _stepping = 0; | |
347 _cpuFeatures = 0; | |
348 _logical_processors_per_package = 1; | |
349 | |
350 if (!Use486InstrsOnly) { | |
351 // Get raw processor info | |
352 getPsrInfo_stub(&_cpuid_info); | |
353 assert_is_initialized(); | |
354 _cpu = extended_cpu_family(); | |
355 _model = extended_cpu_model(); | |
356 _stepping = cpu_stepping(); | |
357 | |
358 if (cpu_family() > 4) { // it supports CPUID | |
359 _cpuFeatures = feature_flags(); | |
360 // Logical processors are only available on P4s and above, | |
361 // and only if hyperthreading is available. | |
362 _logical_processors_per_package = logical_processor_count(); | |
363 } | |
364 } | |
365 | |
366 _supports_cx8 = supports_cmpxchg8(); | |
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367 // xchg and xadd instructions |
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368 _supports_atomic_getset4 = true; |
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369 _supports_atomic_getadd4 = true; |
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370 LP64_ONLY(_supports_atomic_getset8 = true); |
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371 LP64_ONLY(_supports_atomic_getadd8 = true); |
585 | 372 |
373 #ifdef _LP64 | |
374 // OS should support SSE for x64 and hardware should support at least SSE2. | |
375 if (!VM_Version::supports_sse2()) { | |
376 vm_exit_during_initialization("Unknown x64 processor: SSE2 not supported"); | |
377 } | |
1060 | 378 // in 64 bit the use of SSE2 is the minimum |
379 if (UseSSE < 2) UseSSE = 2; | |
585 | 380 #endif |
381 | |
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382 #ifdef AMD64 |
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383 // flush_icache_stub have to be generated first. |
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384 // That is why Icache line size is hard coded in ICache class, |
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385 // see icache_x86.hpp. It is also the reason why we can't use |
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386 // clflush instruction in 32-bit VM since it could be running |
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387 // on CPU which does not support it. |
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388 // |
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389 // The only thing we can do is to verify that flushed |
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390 // ICache::line_size has correct value. |
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391 guarantee(_cpuid_info.std_cpuid1_edx.bits.clflush != 0, "clflush is not supported"); |
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392 // clflush_size is size in quadwords (8 bytes). |
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393 guarantee(_cpuid_info.std_cpuid1_ebx.bits.clflush_size == 8, "such clflush size is not supported"); |
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394 #endif |
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395 |
585 | 396 // If the OS doesn't support SSE, we can't use this feature even if the HW does |
397 if (!os::supports_sse()) | |
398 _cpuFeatures &= ~(CPU_SSE|CPU_SSE2|CPU_SSE3|CPU_SSSE3|CPU_SSE4A|CPU_SSE4_1|CPU_SSE4_2); | |
399 | |
400 if (UseSSE < 4) { | |
401 _cpuFeatures &= ~CPU_SSE4_1; | |
402 _cpuFeatures &= ~CPU_SSE4_2; | |
403 } | |
404 | |
405 if (UseSSE < 3) { | |
406 _cpuFeatures &= ~CPU_SSE3; | |
407 _cpuFeatures &= ~CPU_SSSE3; | |
408 _cpuFeatures &= ~CPU_SSE4A; | |
409 } | |
410 | |
411 if (UseSSE < 2) | |
412 _cpuFeatures &= ~CPU_SSE2; | |
413 | |
414 if (UseSSE < 1) | |
415 _cpuFeatures &= ~CPU_SSE; | |
416 | |
4759 | 417 if (UseAVX < 2) |
418 _cpuFeatures &= ~CPU_AVX2; | |
419 | |
420 if (UseAVX < 1) | |
421 _cpuFeatures &= ~CPU_AVX; | |
422 | |
6894 | 423 if (!UseAES && !FLAG_IS_DEFAULT(UseAES)) |
424 _cpuFeatures &= ~CPU_AES; | |
425 | |
585 | 426 if (logical_processors_per_package() == 1) { |
427 // HT processor could be installed on a system which doesn't support HT. | |
428 _cpuFeatures &= ~CPU_HT; | |
429 } | |
430 | |
431 char buf[256]; | |
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432 jio_snprintf(buf, sizeof(buf), "(%u cores per cpu, %u threads per core) family %d model %d stepping %d%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
585 | 433 cores_per_cpu(), threads_per_core(), |
434 cpu_family(), _model, _stepping, | |
435 (supports_cmov() ? ", cmov" : ""), | |
436 (supports_cmpxchg8() ? ", cx8" : ""), | |
437 (supports_fxsr() ? ", fxsr" : ""), | |
438 (supports_mmx() ? ", mmx" : ""), | |
439 (supports_sse() ? ", sse" : ""), | |
440 (supports_sse2() ? ", sse2" : ""), | |
441 (supports_sse3() ? ", sse3" : ""), | |
442 (supports_ssse3()? ", ssse3": ""), | |
443 (supports_sse4_1() ? ", sse4.1" : ""), | |
444 (supports_sse4_2() ? ", sse4.2" : ""), | |
643
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445 (supports_popcnt() ? ", popcnt" : ""), |
4759 | 446 (supports_avx() ? ", avx" : ""), |
447 (supports_avx2() ? ", avx2" : ""), | |
6894 | 448 (supports_aes() ? ", aes" : ""), |
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449 (supports_erms() ? ", erms" : ""), |
585 | 450 (supports_mmx_ext() ? ", mmxext" : ""), |
2479 | 451 (supports_3dnow_prefetch() ? ", 3dnowpref" : ""), |
775
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452 (supports_lzcnt() ? ", lzcnt": ""), |
585 | 453 (supports_sse4a() ? ", sse4a": ""), |
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454 (supports_ht() ? ", ht": ""), |
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455 (supports_tsc() ? ", tsc": ""), |
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456 (supports_tscinv_bit() ? ", tscinvbit": ""), |
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457 (supports_tscinv() ? ", tscinv": "")); |
585 | 458 _features_str = strdup(buf); |
459 | |
460 // UseSSE is set to the smaller of what hardware supports and what | |
461 // the command line requires. I.e., you cannot set UseSSE to 2 on | |
462 // older Pentiums which do not support it. | |
4759 | 463 if (UseSSE > 4) UseSSE=4; |
464 if (UseSSE < 0) UseSSE=0; | |
465 if (!supports_sse4_1()) // Drop to 3 if no SSE4 support | |
585 | 466 UseSSE = MIN2((intx)3,UseSSE); |
4759 | 467 if (!supports_sse3()) // Drop to 2 if no SSE3 support |
585 | 468 UseSSE = MIN2((intx)2,UseSSE); |
4759 | 469 if (!supports_sse2()) // Drop to 1 if no SSE2 support |
585 | 470 UseSSE = MIN2((intx)1,UseSSE); |
4759 | 471 if (!supports_sse ()) // Drop to 0 if no SSE support |
585 | 472 UseSSE = 0; |
473 | |
4759 | 474 if (UseAVX > 2) UseAVX=2; |
475 if (UseAVX < 0) UseAVX=0; | |
476 if (!supports_avx2()) // Drop to 1 if no AVX2 support | |
477 UseAVX = MIN2((intx)1,UseAVX); | |
478 if (!supports_avx ()) // Drop to 0 if no AVX support | |
479 UseAVX = 0; | |
480 | |
6894 | 481 // Use AES instructions if available. |
482 if (supports_aes()) { | |
483 if (FLAG_IS_DEFAULT(UseAES)) { | |
484 UseAES = true; | |
485 } | |
486 } else if (UseAES) { | |
487 if (!FLAG_IS_DEFAULT(UseAES)) | |
488 warning("AES instructions not available on this CPU"); | |
489 FLAG_SET_DEFAULT(UseAES, false); | |
490 } | |
491 | |
492 // The AES intrinsic stubs require AES instruction support (of course) | |
7427 | 493 // but also require sse3 mode for instructions it use. |
494 if (UseAES && (UseSSE > 2)) { | |
6894 | 495 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) { |
496 UseAESIntrinsics = true; | |
497 } | |
498 } else if (UseAESIntrinsics) { | |
499 if (!FLAG_IS_DEFAULT(UseAESIntrinsics)) | |
500 warning("AES intrinsics not available on this CPU"); | |
501 FLAG_SET_DEFAULT(UseAESIntrinsics, false); | |
502 } | |
503 | |
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504 #ifdef COMPILER2 |
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505 if (UseFPUForSpilling) { |
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506 if (UseSSE < 2) { |
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507 // Only supported with SSE2+ |
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508 FLAG_SET_DEFAULT(UseFPUForSpilling, false); |
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509 } |
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510 } |
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511 if (MaxVectorSize > 0) { |
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512 if (!is_power_of_2(MaxVectorSize)) { |
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513 warning("MaxVectorSize must be a power of 2"); |
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514 FLAG_SET_DEFAULT(MaxVectorSize, 32); |
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515 } |
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516 if (MaxVectorSize > 32) { |
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517 FLAG_SET_DEFAULT(MaxVectorSize, 32); |
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518 } |
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519 if (MaxVectorSize > 16 && UseAVX == 0) { |
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520 // Only supported with AVX+ |
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521 FLAG_SET_DEFAULT(MaxVectorSize, 16); |
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522 } |
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523 if (UseSSE < 2) { |
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524 // Only supported with SSE2+ |
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525 FLAG_SET_DEFAULT(MaxVectorSize, 0); |
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526 } |
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527 } |
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528 #endif |
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529 |
585 | 530 // On new cpus instructions which update whole XMM register should be used |
531 // to prevent partial register stall due to dependencies on high half. | |
532 // | |
533 // UseXmmLoadAndClearUpper == true --> movsd(xmm, mem) | |
534 // UseXmmLoadAndClearUpper == false --> movlpd(xmm, mem) | |
535 // UseXmmRegToRegMoveAll == true --> movaps(xmm, xmm), movapd(xmm, xmm). | |
536 // UseXmmRegToRegMoveAll == false --> movss(xmm, xmm), movsd(xmm, xmm). | |
537 | |
538 if( is_amd() ) { // AMD cpus specific settings | |
539 if( supports_sse2() && FLAG_IS_DEFAULT(UseAddressNop) ) { | |
540 // Use it on new AMD cpus starting from Opteron. | |
541 UseAddressNop = true; | |
542 } | |
543 if( supports_sse2() && FLAG_IS_DEFAULT(UseNewLongLShift) ) { | |
544 // Use it on new AMD cpus starting from Opteron. | |
545 UseNewLongLShift = true; | |
546 } | |
547 if( FLAG_IS_DEFAULT(UseXmmLoadAndClearUpper) ) { | |
548 if( supports_sse4a() ) { | |
549 UseXmmLoadAndClearUpper = true; // use movsd only on '10h' Opteron | |
550 } else { | |
551 UseXmmLoadAndClearUpper = false; | |
552 } | |
553 } | |
554 if( FLAG_IS_DEFAULT(UseXmmRegToRegMoveAll) ) { | |
555 if( supports_sse4a() ) { | |
556 UseXmmRegToRegMoveAll = true; // use movaps, movapd only on '10h' | |
557 } else { | |
558 UseXmmRegToRegMoveAll = false; | |
559 } | |
560 } | |
561 if( FLAG_IS_DEFAULT(UseXmmI2F) ) { | |
562 if( supports_sse4a() ) { | |
563 UseXmmI2F = true; | |
564 } else { | |
565 UseXmmI2F = false; | |
566 } | |
567 } | |
568 if( FLAG_IS_DEFAULT(UseXmmI2D) ) { | |
569 if( supports_sse4a() ) { | |
570 UseXmmI2D = true; | |
571 } else { | |
572 UseXmmI2D = false; | |
573 } | |
574 } | |
2406 | 575 if( FLAG_IS_DEFAULT(UseSSE42Intrinsics) ) { |
576 if( supports_sse4_2() && UseSSE >= 4 ) { | |
577 UseSSE42Intrinsics = true; | |
578 } | |
579 } | |
775
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580 |
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581 // Use count leading zeros count instruction if available. |
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582 if (supports_lzcnt()) { |
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583 if (FLAG_IS_DEFAULT(UseCountLeadingZerosInstruction)) { |
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584 UseCountLeadingZerosInstruction = true; |
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585 } |
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586 } |
2358 | 587 |
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588 // some defaults for AMD family 15h |
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589 if ( cpu_family() == 0x15 ) { |
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590 // On family 15h processors default is no sw prefetch |
2358 | 591 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
592 AllocatePrefetchStyle = 0; | |
593 } | |
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594 // Also, if some other prefetch style is specified, default instruction type is PREFETCHW |
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595 if (FLAG_IS_DEFAULT(AllocatePrefetchInstr)) { |
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596 AllocatePrefetchInstr = 3; |
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597 } |
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598 // On family 15h processors use XMM and UnalignedLoadStores for Array Copy |
6794 | 599 if (supports_sse2() && FLAG_IS_DEFAULT(UseXMMForArrayCopy)) { |
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600 UseXMMForArrayCopy = true; |
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601 } |
6794 | 602 if (supports_sse2() && FLAG_IS_DEFAULT(UseUnalignedLoadStores)) { |
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603 UseUnalignedLoadStores = true; |
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604 } |
2358 | 605 } |
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606 |
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607 #ifdef COMPILER2 |
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608 if (MaxVectorSize > 16) { |
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609 // Limit vectors size to 16 bytes on current AMD cpus. |
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610 FLAG_SET_DEFAULT(MaxVectorSize, 16); |
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611 } |
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612 #endif // COMPILER2 |
585 | 613 } |
614 | |
615 if( is_intel() ) { // Intel cpus specific settings | |
616 if( FLAG_IS_DEFAULT(UseStoreImmI16) ) { | |
617 UseStoreImmI16 = false; // don't use it on Intel cpus | |
618 } | |
619 if( cpu_family() == 6 || cpu_family() == 15 ) { | |
620 if( FLAG_IS_DEFAULT(UseAddressNop) ) { | |
621 // Use it on all Intel cpus starting from PentiumPro | |
622 UseAddressNop = true; | |
623 } | |
624 } | |
625 if( FLAG_IS_DEFAULT(UseXmmLoadAndClearUpper) ) { | |
626 UseXmmLoadAndClearUpper = true; // use movsd on all Intel cpus | |
627 } | |
628 if( FLAG_IS_DEFAULT(UseXmmRegToRegMoveAll) ) { | |
629 if( supports_sse3() ) { | |
630 UseXmmRegToRegMoveAll = true; // use movaps, movapd on new Intel cpus | |
631 } else { | |
632 UseXmmRegToRegMoveAll = false; | |
633 } | |
634 } | |
635 if( cpu_family() == 6 && supports_sse3() ) { // New Intel cpus | |
636 #ifdef COMPILER2 | |
637 if( FLAG_IS_DEFAULT(MaxLoopPad) ) { | |
638 // For new Intel cpus do the next optimization: | |
639 // don't align the beginning of a loop if there are enough instructions | |
640 // left (NumberOfLoopInstrToAlign defined in c2_globals.hpp) | |
641 // in current fetch line (OptoLoopAlignment) or the padding | |
642 // is big (> MaxLoopPad). | |
643 // Set MaxLoopPad to 11 for new Intel cpus to reduce number of | |
644 // generated NOP instructions. 11 is the largest size of one | |
645 // address NOP instruction '0F 1F' (see Assembler::nop(i)). | |
646 MaxLoopPad = 11; | |
647 } | |
648 #endif // COMPILER2 | |
6794 | 649 if (FLAG_IS_DEFAULT(UseXMMForArrayCopy)) { |
585 | 650 UseXMMForArrayCopy = true; // use SSE2 movq on new Intel cpus |
651 } | |
6794 | 652 if (supports_sse4_2() && supports_ht()) { // Newest Intel cpus |
653 if (FLAG_IS_DEFAULT(UseUnalignedLoadStores)) { | |
585 | 654 UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus |
655 } | |
656 } | |
6794 | 657 if (supports_sse4_2() && UseSSE >= 4) { |
658 if (FLAG_IS_DEFAULT(UseSSE42Intrinsics)) { | |
681 | 659 UseSSE42Intrinsics = true; |
660 } | |
661 } | |
585 | 662 } |
663 } | |
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664 #if defined(COMPILER2) && defined(_ALLBSD_SOURCE) |
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665 if (MaxVectorSize > 16) { |
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666 // Limit vectors size to 16 bytes on BSD until it fixes |
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667 // restoring upper 128bit of YMM registers on return |
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668 // from signal handler. |
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669 FLAG_SET_DEFAULT(MaxVectorSize, 16); |
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670 } |
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671 #endif // COMPILER2 |
585 | 672 |
643
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673 // Use population count instruction if available. |
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674 if (supports_popcnt()) { |
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675 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
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676 UsePopCountInstruction = true; |
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677 } |
4759 | 678 } else if (UsePopCountInstruction) { |
679 warning("POPCNT instruction is not available on this CPU"); | |
680 FLAG_SET_DEFAULT(UsePopCountInstruction, false); | |
643
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681 } |
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682 |
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683 // Use fast-string operations if available. |
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684 if (supports_erms()) { |
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685 if (FLAG_IS_DEFAULT(UseFastStosb)) { |
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686 UseFastStosb = true; |
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687 } |
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688 } else if (UseFastStosb) { |
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689 warning("fast-string operations are not available on this CPU"); |
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690 FLAG_SET_DEFAULT(UseFastStosb, false); |
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691 } |
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692 |
6794 | 693 #ifdef COMPILER2 |
694 if (FLAG_IS_DEFAULT(AlignVector)) { | |
695 // Modern processors allow misaligned memory operations for vectors. | |
696 AlignVector = !UseUnalignedLoadStores; | |
697 } | |
698 #endif // COMPILER2 | |
699 | |
585 | 700 assert(0 <= ReadPrefetchInstr && ReadPrefetchInstr <= 3, "invalid value"); |
701 assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 3, "invalid value"); | |
702 | |
703 // set valid Prefetch instruction | |
704 if( ReadPrefetchInstr < 0 ) ReadPrefetchInstr = 0; | |
705 if( ReadPrefetchInstr > 3 ) ReadPrefetchInstr = 3; | |
2479 | 706 if( ReadPrefetchInstr == 3 && !supports_3dnow_prefetch() ) ReadPrefetchInstr = 0; |
707 if( !supports_sse() && supports_3dnow_prefetch() ) ReadPrefetchInstr = 3; | |
585 | 708 |
709 if( AllocatePrefetchInstr < 0 ) AllocatePrefetchInstr = 0; | |
710 if( AllocatePrefetchInstr > 3 ) AllocatePrefetchInstr = 3; | |
2479 | 711 if( AllocatePrefetchInstr == 3 && !supports_3dnow_prefetch() ) AllocatePrefetchInstr=0; |
712 if( !supports_sse() && supports_3dnow_prefetch() ) AllocatePrefetchInstr = 3; | |
585 | 713 |
714 // Allocation prefetch settings | |
3854 | 715 intx cache_line_size = prefetch_data_size(); |
585 | 716 if( cache_line_size > AllocatePrefetchStepSize ) |
717 AllocatePrefetchStepSize = cache_line_size; | |
3854 | 718 |
585 | 719 assert(AllocatePrefetchLines > 0, "invalid value"); |
3854 | 720 if( AllocatePrefetchLines < 1 ) // set valid value in product VM |
721 AllocatePrefetchLines = 3; | |
722 assert(AllocateInstancePrefetchLines > 0, "invalid value"); | |
723 if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM | |
724 AllocateInstancePrefetchLines = 1; | |
585 | 725 |
726 AllocatePrefetchDistance = allocate_prefetch_distance(); | |
727 AllocatePrefetchStyle = allocate_prefetch_style(); | |
728 | |
1622 | 729 if( is_intel() && cpu_family() == 6 && supports_sse3() ) { |
730 if( AllocatePrefetchStyle == 2 ) { // watermark prefetching on Core | |
585 | 731 #ifdef _LP64 |
1622 | 732 AllocatePrefetchDistance = 384; |
585 | 733 #else |
1622 | 734 AllocatePrefetchDistance = 320; |
585 | 735 #endif |
1622 | 736 } |
737 if( supports_sse4_2() && supports_ht() ) { // Nehalem based cpus | |
738 AllocatePrefetchDistance = 192; | |
739 AllocatePrefetchLines = 4; | |
1730
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740 #ifdef COMPILER2 |
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741 if (AggressiveOpts && FLAG_IS_DEFAULT(UseFPUForSpilling)) { |
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742 FLAG_SET_DEFAULT(UseFPUForSpilling, true); |
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743 } |
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744 #endif |
1622 | 745 } |
585 | 746 } |
747 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); | |
748 | |
749 #ifdef _LP64 | |
750 // Prefetch settings | |
751 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); | |
752 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); | |
753 PrefetchFieldsAhead = prefetch_fields_ahead(); | |
754 #endif | |
755 | |
7587 | 756 if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && |
757 (cache_line_size > ContendedPaddingWidth)) | |
758 ContendedPaddingWidth = cache_line_size; | |
759 | |
585 | 760 #ifndef PRODUCT |
761 if (PrintMiscellaneous && Verbose) { | |
762 tty->print_cr("Logical CPUs per core: %u", | |
763 logical_processors_per_package()); | |
4759 | 764 tty->print("UseSSE=%d",UseSSE); |
765 if (UseAVX > 0) { | |
766 tty->print(" UseAVX=%d",UseAVX); | |
767 } | |
6894 | 768 if (UseAES) { |
769 tty->print(" UseAES=1"); | |
770 } | |
4759 | 771 tty->cr(); |
3854 | 772 tty->print("Allocation"); |
2479 | 773 if (AllocatePrefetchStyle <= 0 || UseSSE == 0 && !supports_3dnow_prefetch()) { |
3854 | 774 tty->print_cr(": no prefetching"); |
585 | 775 } else { |
3854 | 776 tty->print(" prefetching: "); |
2479 | 777 if (UseSSE == 0 && supports_3dnow_prefetch()) { |
585 | 778 tty->print("PREFETCHW"); |
779 } else if (UseSSE >= 1) { | |
780 if (AllocatePrefetchInstr == 0) { | |
781 tty->print("PREFETCHNTA"); | |
782 } else if (AllocatePrefetchInstr == 1) { | |
783 tty->print("PREFETCHT0"); | |
784 } else if (AllocatePrefetchInstr == 2) { | |
785 tty->print("PREFETCHT2"); | |
786 } else if (AllocatePrefetchInstr == 3) { | |
787 tty->print("PREFETCHW"); | |
788 } | |
789 } | |
790 if (AllocatePrefetchLines > 1) { | |
3854 | 791 tty->print_cr(" at distance %d, %d lines of %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); |
585 | 792 } else { |
3854 | 793 tty->print_cr(" at distance %d, one line of %d bytes", AllocatePrefetchDistance, AllocatePrefetchStepSize); |
585 | 794 } |
795 } | |
796 | |
797 if (PrefetchCopyIntervalInBytes > 0) { | |
798 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); | |
799 } | |
800 if (PrefetchScanIntervalInBytes > 0) { | |
801 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); | |
802 } | |
803 if (PrefetchFieldsAhead > 0) { | |
804 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); | |
805 } | |
7587 | 806 if (ContendedPaddingWidth > 0) { |
807 tty->print_cr("ContendedPaddingWidth %d", ContendedPaddingWidth); | |
808 } | |
585 | 809 } |
810 #endif // !PRODUCT | |
811 } | |
812 | |
813 void VM_Version::initialize() { | |
814 ResourceMark rm; | |
815 // Making this stub must be FIRST use of assembler | |
816 | |
817 stub_blob = BufferBlob::create("getPsrInfo_stub", stub_size); | |
818 if (stub_blob == NULL) { | |
819 vm_exit_during_initialization("Unable to allocate getPsrInfo_stub"); | |
820 } | |
1748 | 821 CodeBuffer c(stub_blob); |
585 | 822 VM_Version_StubGenerator g(&c); |
823 getPsrInfo_stub = CAST_TO_FN_PTR(getPsrInfo_stub_t, | |
824 g.generate_getPsrInfo()); | |
825 | |
826 get_processor_features(); | |
827 } |