Mercurial > hg > truffle
annotate src/cpu/x86/vm/vm_version_x86.cpp @ 6229:d900d95bfdb0
7183754: Test runtime/6294277/Test6294277.sh runs wrong JVM
Reviewed-by: kamg, coleenp, ctornqvi
author | fparain |
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date | Mon, 16 Jul 2012 04:06:44 -0700 |
parents | 8c92982cbbc4 |
children | 2c368ea3e844 |
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" |
26 #include "assembler_x86.inline.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "runtime/java.hpp" | |
29 #include "runtime/stubCodeGenerator.hpp" | |
30 #include "vm_version_x86.hpp" | |
31 #ifdef TARGET_OS_FAMILY_linux | |
32 # include "os_linux.inline.hpp" | |
33 #endif | |
34 #ifdef TARGET_OS_FAMILY_solaris | |
35 # include "os_solaris.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_windows | |
38 # include "os_windows.inline.hpp" | |
39 #endif | |
3960 | 40 #ifdef TARGET_OS_FAMILY_bsd |
41 # include "os_bsd.inline.hpp" | |
42 #endif | |
585 | 43 |
44 | |
45 int VM_Version::_cpu; | |
46 int VM_Version::_model; | |
47 int VM_Version::_stepping; | |
48 int VM_Version::_cpuFeatures; | |
49 const char* VM_Version::_features_str = ""; | |
50 VM_Version::CpuidInfo VM_Version::_cpuid_info = { 0, }; | |
51 | |
52 static BufferBlob* stub_blob; | |
4771 | 53 static const int stub_size = 550; |
585 | 54 |
55 extern "C" { | |
56 typedef void (*getPsrInfo_stub_t)(void*); | |
57 } | |
58 static getPsrInfo_stub_t getPsrInfo_stub = NULL; | |
59 | |
60 | |
61 class VM_Version_StubGenerator: public StubCodeGenerator { | |
62 public: | |
63 | |
64 VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {} | |
65 | |
66 address generate_getPsrInfo() { | |
67 // Flags to test CPU type. | |
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68 const uint32_t HS_EFL_AC = 0x40000; |
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69 const uint32_t HS_EFL_ID = 0x200000; |
585 | 70 // Values for when we don't have a CPUID instruction. |
71 const int CPU_FAMILY_SHIFT = 8; | |
72 const uint32_t CPU_FAMILY_386 = (3 << CPU_FAMILY_SHIFT); | |
73 const uint32_t CPU_FAMILY_486 = (4 << CPU_FAMILY_SHIFT); | |
74 | |
1622 | 75 Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4; |
4771 | 76 Label sef_cpuid, ext_cpuid, ext_cpuid1, ext_cpuid5, ext_cpuid7, done; |
585 | 77 |
78 StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub"); | |
79 # define __ _masm-> | |
80 | |
81 address start = __ pc(); | |
82 | |
83 // | |
84 // void getPsrInfo(VM_Version::CpuidInfo* cpuid_info); | |
85 // | |
86 // LP64: rcx and rdx are first and second argument registers on windows | |
87 | |
88 __ push(rbp); | |
89 #ifdef _LP64 | |
90 __ mov(rbp, c_rarg0); // cpuid_info address | |
91 #else | |
92 __ movptr(rbp, Address(rsp, 8)); // cpuid_info address | |
93 #endif | |
94 __ push(rbx); | |
95 __ push(rsi); | |
96 __ pushf(); // preserve rbx, and flags | |
97 __ pop(rax); | |
98 __ push(rax); | |
99 __ mov(rcx, rax); | |
100 // | |
101 // if we are unable to change the AC flag, we have a 386 | |
102 // | |
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103 __ xorl(rax, HS_EFL_AC); |
585 | 104 __ push(rax); |
105 __ popf(); | |
106 __ pushf(); | |
107 __ pop(rax); | |
108 __ cmpptr(rax, rcx); | |
109 __ jccb(Assembler::notEqual, detect_486); | |
110 | |
111 __ movl(rax, CPU_FAMILY_386); | |
112 __ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax); | |
113 __ jmp(done); | |
114 | |
115 // | |
116 // If we are unable to change the ID flag, we have a 486 which does | |
117 // not support the "cpuid" instruction. | |
118 // | |
119 __ bind(detect_486); | |
120 __ mov(rax, rcx); | |
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121 __ xorl(rax, HS_EFL_ID); |
585 | 122 __ push(rax); |
123 __ popf(); | |
124 __ pushf(); | |
125 __ pop(rax); | |
126 __ cmpptr(rcx, rax); | |
127 __ jccb(Assembler::notEqual, detect_586); | |
128 | |
129 __ bind(cpu486); | |
130 __ movl(rax, CPU_FAMILY_486); | |
131 __ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax); | |
132 __ jmp(done); | |
133 | |
134 // | |
135 // At this point, we have a chip which supports the "cpuid" instruction | |
136 // | |
137 __ bind(detect_586); | |
138 __ xorl(rax, rax); | |
139 __ cpuid(); | |
140 __ orl(rax, rax); | |
141 __ jcc(Assembler::equal, cpu486); // if cpuid doesn't support an input | |
142 // value of at least 1, we give up and | |
143 // assume a 486 | |
144 __ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); | |
145 __ movl(Address(rsi, 0), rax); | |
146 __ movl(Address(rsi, 4), rbx); | |
147 __ movl(Address(rsi, 8), rcx); | |
148 __ movl(Address(rsi,12), rdx); | |
149 | |
1622 | 150 __ cmpl(rax, 0xa); // Is cpuid(0xB) supported? |
151 __ jccb(Assembler::belowEqual, std_cpuid4); | |
152 | |
153 // | |
154 // cpuid(0xB) Processor Topology | |
155 // | |
156 __ movl(rax, 0xb); | |
157 __ xorl(rcx, rcx); // Threads level | |
158 __ cpuid(); | |
159 | |
160 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB0_offset()))); | |
161 __ movl(Address(rsi, 0), rax); | |
162 __ movl(Address(rsi, 4), rbx); | |
163 __ movl(Address(rsi, 8), rcx); | |
164 __ movl(Address(rsi,12), rdx); | |
165 | |
166 __ movl(rax, 0xb); | |
167 __ movl(rcx, 1); // Cores level | |
168 __ cpuid(); | |
169 __ push(rax); | |
170 __ andl(rax, 0x1f); // Determine if valid topology level | |
171 __ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level | |
172 __ andl(rax, 0xffff); | |
173 __ pop(rax); | |
174 __ jccb(Assembler::equal, std_cpuid4); | |
175 | |
176 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB1_offset()))); | |
177 __ movl(Address(rsi, 0), rax); | |
178 __ movl(Address(rsi, 4), rbx); | |
179 __ movl(Address(rsi, 8), rcx); | |
180 __ movl(Address(rsi,12), rdx); | |
181 | |
182 __ movl(rax, 0xb); | |
183 __ movl(rcx, 2); // Packages level | |
184 __ cpuid(); | |
185 __ push(rax); | |
186 __ andl(rax, 0x1f); // Determine if valid topology level | |
187 __ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level | |
188 __ andl(rax, 0xffff); | |
189 __ pop(rax); | |
190 __ jccb(Assembler::equal, std_cpuid4); | |
191 | |
192 __ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB2_offset()))); | |
193 __ movl(Address(rsi, 0), rax); | |
194 __ movl(Address(rsi, 4), rbx); | |
195 __ movl(Address(rsi, 8), rcx); | |
196 __ movl(Address(rsi,12), rdx); | |
585 | 197 |
198 // | |
199 // cpuid(0x4) Deterministic cache params | |
200 // | |
1622 | 201 __ bind(std_cpuid4); |
585 | 202 __ movl(rax, 4); |
1622 | 203 __ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x4) supported? |
204 __ jccb(Assembler::greater, std_cpuid1); | |
205 | |
585 | 206 __ xorl(rcx, rcx); // L1 cache |
207 __ cpuid(); | |
208 __ push(rax); | |
209 __ andl(rax, 0x1f); // Determine if valid cache parameters used | |
210 __ orl(rax, rax); // eax[4:0] == 0 indicates invalid cache | |
211 __ pop(rax); | |
212 __ jccb(Assembler::equal, std_cpuid1); | |
213 | |
214 __ lea(rsi, Address(rbp, in_bytes(VM_Version::dcp_cpuid4_offset()))); | |
215 __ movl(Address(rsi, 0), rax); | |
216 __ movl(Address(rsi, 4), rbx); | |
217 __ movl(Address(rsi, 8), rcx); | |
218 __ movl(Address(rsi,12), rdx); | |
219 | |
220 // | |
221 // Standard cpuid(0x1) | |
222 // | |
223 __ bind(std_cpuid1); | |
224 __ movl(rax, 1); | |
225 __ cpuid(); | |
226 __ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid1_offset()))); | |
227 __ movl(Address(rsi, 0), rax); | |
228 __ movl(Address(rsi, 4), rbx); | |
229 __ movl(Address(rsi, 8), rcx); | |
230 __ movl(Address(rsi,12), rdx); | |
231 | |
4759 | 232 // |
233 // Check if OS has enabled XGETBV instruction to access XCR0 | |
234 // (OSXSAVE feature flag) and CPU supports AVX | |
235 // | |
236 __ andl(rcx, 0x18000000); | |
237 __ cmpl(rcx, 0x18000000); | |
238 __ jccb(Assembler::notEqual, sef_cpuid); | |
239 | |
240 // | |
241 // XCR0, XFEATURE_ENABLED_MASK register | |
242 // | |
243 __ xorl(rcx, rcx); // zero for XCR0 register | |
244 __ xgetbv(); | |
245 __ lea(rsi, Address(rbp, in_bytes(VM_Version::xem_xcr0_offset()))); | |
246 __ movl(Address(rsi, 0), rax); | |
247 __ movl(Address(rsi, 4), rdx); | |
248 | |
249 // | |
250 // cpuid(0x7) Structured Extended Features | |
251 // | |
252 __ bind(sef_cpuid); | |
253 __ movl(rax, 7); | |
254 __ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x7) supported? | |
255 __ jccb(Assembler::greater, ext_cpuid); | |
256 | |
257 __ xorl(rcx, rcx); | |
258 __ cpuid(); | |
259 __ lea(rsi, Address(rbp, in_bytes(VM_Version::sef_cpuid7_offset()))); | |
260 __ movl(Address(rsi, 0), rax); | |
261 __ movl(Address(rsi, 4), rbx); | |
262 | |
263 // | |
264 // Extended cpuid(0x80000000) | |
265 // | |
266 __ bind(ext_cpuid); | |
585 | 267 __ movl(rax, 0x80000000); |
268 __ cpuid(); | |
269 __ cmpl(rax, 0x80000000); // Is cpuid(0x80000001) supported? | |
270 __ jcc(Assembler::belowEqual, done); | |
271 __ cmpl(rax, 0x80000004); // Is cpuid(0x80000005) supported? | |
272 __ jccb(Assembler::belowEqual, ext_cpuid1); | |
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273 __ cmpl(rax, 0x80000006); // Is cpuid(0x80000007) supported? |
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274 __ jccb(Assembler::belowEqual, ext_cpuid5); |
585 | 275 __ cmpl(rax, 0x80000007); // Is cpuid(0x80000008) supported? |
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276 __ jccb(Assembler::belowEqual, ext_cpuid7); |
585 | 277 // |
278 // Extended cpuid(0x80000008) | |
279 // | |
280 __ movl(rax, 0x80000008); | |
281 __ cpuid(); | |
282 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid8_offset()))); | |
283 __ movl(Address(rsi, 0), rax); | |
284 __ movl(Address(rsi, 4), rbx); | |
285 __ movl(Address(rsi, 8), rcx); | |
286 __ movl(Address(rsi,12), rdx); | |
287 | |
288 // | |
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289 // Extended cpuid(0x80000007) |
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290 // |
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291 __ bind(ext_cpuid7); |
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292 __ movl(rax, 0x80000007); |
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293 __ cpuid(); |
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294 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid7_offset()))); |
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295 __ movl(Address(rsi, 0), rax); |
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296 __ movl(Address(rsi, 4), rbx); |
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297 __ movl(Address(rsi, 8), rcx); |
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298 __ movl(Address(rsi,12), rdx); |
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299 |
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300 // |
585 | 301 // Extended cpuid(0x80000005) |
302 // | |
303 __ bind(ext_cpuid5); | |
304 __ movl(rax, 0x80000005); | |
305 __ cpuid(); | |
306 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid5_offset()))); | |
307 __ movl(Address(rsi, 0), rax); | |
308 __ movl(Address(rsi, 4), rbx); | |
309 __ movl(Address(rsi, 8), rcx); | |
310 __ movl(Address(rsi,12), rdx); | |
311 | |
312 // | |
313 // Extended cpuid(0x80000001) | |
314 // | |
315 __ bind(ext_cpuid1); | |
316 __ movl(rax, 0x80000001); | |
317 __ cpuid(); | |
318 __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid1_offset()))); | |
319 __ movl(Address(rsi, 0), rax); | |
320 __ movl(Address(rsi, 4), rbx); | |
321 __ movl(Address(rsi, 8), rcx); | |
322 __ movl(Address(rsi,12), rdx); | |
323 | |
324 // | |
325 // return | |
326 // | |
327 __ bind(done); | |
328 __ popf(); | |
329 __ pop(rsi); | |
330 __ pop(rbx); | |
331 __ pop(rbp); | |
332 __ ret(0); | |
333 | |
334 # undef __ | |
335 | |
336 return start; | |
337 }; | |
338 }; | |
339 | |
340 | |
341 void VM_Version::get_processor_features() { | |
342 | |
343 _cpu = 4; // 486 by default | |
344 _model = 0; | |
345 _stepping = 0; | |
346 _cpuFeatures = 0; | |
347 _logical_processors_per_package = 1; | |
348 | |
349 if (!Use486InstrsOnly) { | |
350 // Get raw processor info | |
351 getPsrInfo_stub(&_cpuid_info); | |
352 assert_is_initialized(); | |
353 _cpu = extended_cpu_family(); | |
354 _model = extended_cpu_model(); | |
355 _stepping = cpu_stepping(); | |
356 | |
357 if (cpu_family() > 4) { // it supports CPUID | |
358 _cpuFeatures = feature_flags(); | |
359 // Logical processors are only available on P4s and above, | |
360 // and only if hyperthreading is available. | |
361 _logical_processors_per_package = logical_processor_count(); | |
362 } | |
363 } | |
364 | |
365 _supports_cx8 = supports_cmpxchg8(); | |
366 | |
367 #ifdef _LP64 | |
368 // OS should support SSE for x64 and hardware should support at least SSE2. | |
369 if (!VM_Version::supports_sse2()) { | |
370 vm_exit_during_initialization("Unknown x64 processor: SSE2 not supported"); | |
371 } | |
1060 | 372 // in 64 bit the use of SSE2 is the minimum |
373 if (UseSSE < 2) UseSSE = 2; | |
585 | 374 #endif |
375 | |
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376 #ifdef AMD64 |
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377 // flush_icache_stub have to be generated first. |
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378 // That is why Icache line size is hard coded in ICache class, |
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379 // see icache_x86.hpp. It is also the reason why we can't use |
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380 // clflush instruction in 32-bit VM since it could be running |
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381 // on CPU which does not support it. |
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382 // |
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383 // The only thing we can do is to verify that flushed |
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384 // ICache::line_size has correct value. |
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385 guarantee(_cpuid_info.std_cpuid1_edx.bits.clflush != 0, "clflush is not supported"); |
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386 // clflush_size is size in quadwords (8 bytes). |
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387 guarantee(_cpuid_info.std_cpuid1_ebx.bits.clflush_size == 8, "such clflush size is not supported"); |
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388 #endif |
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389 |
585 | 390 // If the OS doesn't support SSE, we can't use this feature even if the HW does |
391 if (!os::supports_sse()) | |
392 _cpuFeatures &= ~(CPU_SSE|CPU_SSE2|CPU_SSE3|CPU_SSSE3|CPU_SSE4A|CPU_SSE4_1|CPU_SSE4_2); | |
393 | |
394 if (UseSSE < 4) { | |
395 _cpuFeatures &= ~CPU_SSE4_1; | |
396 _cpuFeatures &= ~CPU_SSE4_2; | |
397 } | |
398 | |
399 if (UseSSE < 3) { | |
400 _cpuFeatures &= ~CPU_SSE3; | |
401 _cpuFeatures &= ~CPU_SSSE3; | |
402 _cpuFeatures &= ~CPU_SSE4A; | |
403 } | |
404 | |
405 if (UseSSE < 2) | |
406 _cpuFeatures &= ~CPU_SSE2; | |
407 | |
408 if (UseSSE < 1) | |
409 _cpuFeatures &= ~CPU_SSE; | |
410 | |
4759 | 411 if (UseAVX < 2) |
412 _cpuFeatures &= ~CPU_AVX2; | |
413 | |
414 if (UseAVX < 1) | |
415 _cpuFeatures &= ~CPU_AVX; | |
416 | |
585 | 417 if (logical_processors_per_package() == 1) { |
418 // HT processor could be installed on a system which doesn't support HT. | |
419 _cpuFeatures &= ~CPU_HT; | |
420 } | |
421 | |
422 char buf[256]; | |
4771 | 423 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", |
585 | 424 cores_per_cpu(), threads_per_core(), |
425 cpu_family(), _model, _stepping, | |
426 (supports_cmov() ? ", cmov" : ""), | |
427 (supports_cmpxchg8() ? ", cx8" : ""), | |
428 (supports_fxsr() ? ", fxsr" : ""), | |
429 (supports_mmx() ? ", mmx" : ""), | |
430 (supports_sse() ? ", sse" : ""), | |
431 (supports_sse2() ? ", sse2" : ""), | |
432 (supports_sse3() ? ", sse3" : ""), | |
433 (supports_ssse3()? ", ssse3": ""), | |
434 (supports_sse4_1() ? ", sse4.1" : ""), | |
435 (supports_sse4_2() ? ", sse4.2" : ""), | |
643
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436 (supports_popcnt() ? ", popcnt" : ""), |
4759 | 437 (supports_avx() ? ", avx" : ""), |
438 (supports_avx2() ? ", avx2" : ""), | |
585 | 439 (supports_mmx_ext() ? ", mmxext" : ""), |
2479 | 440 (supports_3dnow_prefetch() ? ", 3dnowpref" : ""), |
775
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441 (supports_lzcnt() ? ", lzcnt": ""), |
585 | 442 (supports_sse4a() ? ", sse4a": ""), |
4749
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443 (supports_ht() ? ", ht": ""), |
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444 (supports_tsc() ? ", tsc": ""), |
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445 (supports_tscinv_bit() ? ", tscinvbit": ""), |
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446 (supports_tscinv() ? ", tscinv": "")); |
585 | 447 _features_str = strdup(buf); |
448 | |
449 // UseSSE is set to the smaller of what hardware supports and what | |
450 // the command line requires. I.e., you cannot set UseSSE to 2 on | |
451 // older Pentiums which do not support it. | |
4759 | 452 if (UseSSE > 4) UseSSE=4; |
453 if (UseSSE < 0) UseSSE=0; | |
454 if (!supports_sse4_1()) // Drop to 3 if no SSE4 support | |
585 | 455 UseSSE = MIN2((intx)3,UseSSE); |
4759 | 456 if (!supports_sse3()) // Drop to 2 if no SSE3 support |
585 | 457 UseSSE = MIN2((intx)2,UseSSE); |
4759 | 458 if (!supports_sse2()) // Drop to 1 if no SSE2 support |
585 | 459 UseSSE = MIN2((intx)1,UseSSE); |
4759 | 460 if (!supports_sse ()) // Drop to 0 if no SSE support |
585 | 461 UseSSE = 0; |
462 | |
4759 | 463 if (UseAVX > 2) UseAVX=2; |
464 if (UseAVX < 0) UseAVX=0; | |
465 if (!supports_avx2()) // Drop to 1 if no AVX2 support | |
466 UseAVX = MIN2((intx)1,UseAVX); | |
467 if (!supports_avx ()) // Drop to 0 if no AVX support | |
468 UseAVX = 0; | |
469 | |
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470 #ifdef COMPILER2 |
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471 if (UseFPUForSpilling) { |
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472 if (UseSSE < 2) { |
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473 // Only supported with SSE2+ |
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474 FLAG_SET_DEFAULT(UseFPUForSpilling, false); |
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475 } |
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476 } |
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477 if (MaxVectorSize > 0) { |
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478 if (!is_power_of_2(MaxVectorSize)) { |
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479 warning("MaxVectorSize must be a power of 2"); |
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480 FLAG_SET_DEFAULT(MaxVectorSize, 32); |
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481 } |
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482 if (MaxVectorSize > 32) { |
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483 FLAG_SET_DEFAULT(MaxVectorSize, 32); |
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484 } |
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485 if (MaxVectorSize > 16 && UseAVX == 0) { |
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486 // Only supported with AVX+ |
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487 FLAG_SET_DEFAULT(MaxVectorSize, 16); |
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488 } |
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489 if (UseSSE < 2) { |
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490 // Only supported with SSE2+ |
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491 FLAG_SET_DEFAULT(MaxVectorSize, 0); |
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492 } |
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493 } |
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494 #endif |
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495 |
585 | 496 // On new cpus instructions which update whole XMM register should be used |
497 // to prevent partial register stall due to dependencies on high half. | |
498 // | |
499 // UseXmmLoadAndClearUpper == true --> movsd(xmm, mem) | |
500 // UseXmmLoadAndClearUpper == false --> movlpd(xmm, mem) | |
501 // UseXmmRegToRegMoveAll == true --> movaps(xmm, xmm), movapd(xmm, xmm). | |
502 // UseXmmRegToRegMoveAll == false --> movss(xmm, xmm), movsd(xmm, xmm). | |
503 | |
504 if( is_amd() ) { // AMD cpus specific settings | |
505 if( supports_sse2() && FLAG_IS_DEFAULT(UseAddressNop) ) { | |
506 // Use it on new AMD cpus starting from Opteron. | |
507 UseAddressNop = true; | |
508 } | |
509 if( supports_sse2() && FLAG_IS_DEFAULT(UseNewLongLShift) ) { | |
510 // Use it on new AMD cpus starting from Opteron. | |
511 UseNewLongLShift = true; | |
512 } | |
513 if( FLAG_IS_DEFAULT(UseXmmLoadAndClearUpper) ) { | |
514 if( supports_sse4a() ) { | |
515 UseXmmLoadAndClearUpper = true; // use movsd only on '10h' Opteron | |
516 } else { | |
517 UseXmmLoadAndClearUpper = false; | |
518 } | |
519 } | |
520 if( FLAG_IS_DEFAULT(UseXmmRegToRegMoveAll) ) { | |
521 if( supports_sse4a() ) { | |
522 UseXmmRegToRegMoveAll = true; // use movaps, movapd only on '10h' | |
523 } else { | |
524 UseXmmRegToRegMoveAll = false; | |
525 } | |
526 } | |
527 if( FLAG_IS_DEFAULT(UseXmmI2F) ) { | |
528 if( supports_sse4a() ) { | |
529 UseXmmI2F = true; | |
530 } else { | |
531 UseXmmI2F = false; | |
532 } | |
533 } | |
534 if( FLAG_IS_DEFAULT(UseXmmI2D) ) { | |
535 if( supports_sse4a() ) { | |
536 UseXmmI2D = true; | |
537 } else { | |
538 UseXmmI2D = false; | |
539 } | |
540 } | |
2406 | 541 if( FLAG_IS_DEFAULT(UseSSE42Intrinsics) ) { |
542 if( supports_sse4_2() && UseSSE >= 4 ) { | |
543 UseSSE42Intrinsics = true; | |
544 } | |
545 } | |
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546 |
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547 // Use count leading zeros count instruction if available. |
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548 if (supports_lzcnt()) { |
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549 if (FLAG_IS_DEFAULT(UseCountLeadingZerosInstruction)) { |
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550 UseCountLeadingZerosInstruction = true; |
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551 } |
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552 } |
2358 | 553 |
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554 // some defaults for AMD family 15h |
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555 if ( cpu_family() == 0x15 ) { |
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556 // On family 15h processors default is no sw prefetch |
2358 | 557 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
558 AllocatePrefetchStyle = 0; | |
559 } | |
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560 // Also, if some other prefetch style is specified, default instruction type is PREFETCHW |
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561 if (FLAG_IS_DEFAULT(AllocatePrefetchInstr)) { |
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562 AllocatePrefetchInstr = 3; |
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563 } |
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564 // On family 15h processors use XMM and UnalignedLoadStores for Array Copy |
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565 if( FLAG_IS_DEFAULT(UseXMMForArrayCopy) ) { |
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566 UseXMMForArrayCopy = true; |
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567 } |
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568 if( FLAG_IS_DEFAULT(UseUnalignedLoadStores) && UseXMMForArrayCopy ) { |
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569 UseUnalignedLoadStores = true; |
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570 } |
2358 | 571 } |
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572 |
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573 #ifdef COMPILER2 |
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574 if (MaxVectorSize > 16) { |
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575 // Limit vectors size to 16 bytes on current AMD cpus. |
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576 FLAG_SET_DEFAULT(MaxVectorSize, 16); |
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577 } |
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578 #endif // COMPILER2 |
585 | 579 } |
580 | |
581 if( is_intel() ) { // Intel cpus specific settings | |
582 if( FLAG_IS_DEFAULT(UseStoreImmI16) ) { | |
583 UseStoreImmI16 = false; // don't use it on Intel cpus | |
584 } | |
585 if( cpu_family() == 6 || cpu_family() == 15 ) { | |
586 if( FLAG_IS_DEFAULT(UseAddressNop) ) { | |
587 // Use it on all Intel cpus starting from PentiumPro | |
588 UseAddressNop = true; | |
589 } | |
590 } | |
591 if( FLAG_IS_DEFAULT(UseXmmLoadAndClearUpper) ) { | |
592 UseXmmLoadAndClearUpper = true; // use movsd on all Intel cpus | |
593 } | |
594 if( FLAG_IS_DEFAULT(UseXmmRegToRegMoveAll) ) { | |
595 if( supports_sse3() ) { | |
596 UseXmmRegToRegMoveAll = true; // use movaps, movapd on new Intel cpus | |
597 } else { | |
598 UseXmmRegToRegMoveAll = false; | |
599 } | |
600 } | |
601 if( cpu_family() == 6 && supports_sse3() ) { // New Intel cpus | |
602 #ifdef COMPILER2 | |
603 if( FLAG_IS_DEFAULT(MaxLoopPad) ) { | |
604 // For new Intel cpus do the next optimization: | |
605 // don't align the beginning of a loop if there are enough instructions | |
606 // left (NumberOfLoopInstrToAlign defined in c2_globals.hpp) | |
607 // in current fetch line (OptoLoopAlignment) or the padding | |
608 // is big (> MaxLoopPad). | |
609 // Set MaxLoopPad to 11 for new Intel cpus to reduce number of | |
610 // generated NOP instructions. 11 is the largest size of one | |
611 // address NOP instruction '0F 1F' (see Assembler::nop(i)). | |
612 MaxLoopPad = 11; | |
613 } | |
614 #endif // COMPILER2 | |
615 if( FLAG_IS_DEFAULT(UseXMMForArrayCopy) ) { | |
616 UseXMMForArrayCopy = true; // use SSE2 movq on new Intel cpus | |
617 } | |
618 if( supports_sse4_2() && supports_ht() ) { // Newest Intel cpus | |
619 if( FLAG_IS_DEFAULT(UseUnalignedLoadStores) && UseXMMForArrayCopy ) { | |
620 UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus | |
621 } | |
622 } | |
681 | 623 if( supports_sse4_2() && UseSSE >= 4 ) { |
624 if( FLAG_IS_DEFAULT(UseSSE42Intrinsics)) { | |
625 UseSSE42Intrinsics = true; | |
626 } | |
627 } | |
585 | 628 } |
629 } | |
630 | |
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631 // Use population count instruction if available. |
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632 if (supports_popcnt()) { |
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633 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
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634 UsePopCountInstruction = true; |
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635 } |
4759 | 636 } else if (UsePopCountInstruction) { |
637 warning("POPCNT instruction is not available on this CPU"); | |
638 FLAG_SET_DEFAULT(UsePopCountInstruction, false); | |
643
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639 } |
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640 |
585 | 641 assert(0 <= ReadPrefetchInstr && ReadPrefetchInstr <= 3, "invalid value"); |
642 assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 3, "invalid value"); | |
643 | |
644 // set valid Prefetch instruction | |
645 if( ReadPrefetchInstr < 0 ) ReadPrefetchInstr = 0; | |
646 if( ReadPrefetchInstr > 3 ) ReadPrefetchInstr = 3; | |
2479 | 647 if( ReadPrefetchInstr == 3 && !supports_3dnow_prefetch() ) ReadPrefetchInstr = 0; |
648 if( !supports_sse() && supports_3dnow_prefetch() ) ReadPrefetchInstr = 3; | |
585 | 649 |
650 if( AllocatePrefetchInstr < 0 ) AllocatePrefetchInstr = 0; | |
651 if( AllocatePrefetchInstr > 3 ) AllocatePrefetchInstr = 3; | |
2479 | 652 if( AllocatePrefetchInstr == 3 && !supports_3dnow_prefetch() ) AllocatePrefetchInstr=0; |
653 if( !supports_sse() && supports_3dnow_prefetch() ) AllocatePrefetchInstr = 3; | |
585 | 654 |
655 // Allocation prefetch settings | |
3854 | 656 intx cache_line_size = prefetch_data_size(); |
585 | 657 if( cache_line_size > AllocatePrefetchStepSize ) |
658 AllocatePrefetchStepSize = cache_line_size; | |
3854 | 659 |
585 | 660 assert(AllocatePrefetchLines > 0, "invalid value"); |
3854 | 661 if( AllocatePrefetchLines < 1 ) // set valid value in product VM |
662 AllocatePrefetchLines = 3; | |
663 assert(AllocateInstancePrefetchLines > 0, "invalid value"); | |
664 if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM | |
665 AllocateInstancePrefetchLines = 1; | |
585 | 666 |
667 AllocatePrefetchDistance = allocate_prefetch_distance(); | |
668 AllocatePrefetchStyle = allocate_prefetch_style(); | |
669 | |
1622 | 670 if( is_intel() && cpu_family() == 6 && supports_sse3() ) { |
671 if( AllocatePrefetchStyle == 2 ) { // watermark prefetching on Core | |
585 | 672 #ifdef _LP64 |
1622 | 673 AllocatePrefetchDistance = 384; |
585 | 674 #else |
1622 | 675 AllocatePrefetchDistance = 320; |
585 | 676 #endif |
1622 | 677 } |
678 if( supports_sse4_2() && supports_ht() ) { // Nehalem based cpus | |
679 AllocatePrefetchDistance = 192; | |
680 AllocatePrefetchLines = 4; | |
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681 #ifdef COMPILER2 |
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682 if (AggressiveOpts && FLAG_IS_DEFAULT(UseFPUForSpilling)) { |
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683 FLAG_SET_DEFAULT(UseFPUForSpilling, true); |
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684 } |
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685 #endif |
1622 | 686 } |
585 | 687 } |
688 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); | |
689 | |
690 #ifdef _LP64 | |
691 // Prefetch settings | |
692 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); | |
693 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); | |
694 PrefetchFieldsAhead = prefetch_fields_ahead(); | |
695 #endif | |
696 | |
697 #ifndef PRODUCT | |
698 if (PrintMiscellaneous && Verbose) { | |
699 tty->print_cr("Logical CPUs per core: %u", | |
700 logical_processors_per_package()); | |
4759 | 701 tty->print("UseSSE=%d",UseSSE); |
702 if (UseAVX > 0) { | |
703 tty->print(" UseAVX=%d",UseAVX); | |
704 } | |
705 tty->cr(); | |
3854 | 706 tty->print("Allocation"); |
2479 | 707 if (AllocatePrefetchStyle <= 0 || UseSSE == 0 && !supports_3dnow_prefetch()) { |
3854 | 708 tty->print_cr(": no prefetching"); |
585 | 709 } else { |
3854 | 710 tty->print(" prefetching: "); |
2479 | 711 if (UseSSE == 0 && supports_3dnow_prefetch()) { |
585 | 712 tty->print("PREFETCHW"); |
713 } else if (UseSSE >= 1) { | |
714 if (AllocatePrefetchInstr == 0) { | |
715 tty->print("PREFETCHNTA"); | |
716 } else if (AllocatePrefetchInstr == 1) { | |
717 tty->print("PREFETCHT0"); | |
718 } else if (AllocatePrefetchInstr == 2) { | |
719 tty->print("PREFETCHT2"); | |
720 } else if (AllocatePrefetchInstr == 3) { | |
721 tty->print("PREFETCHW"); | |
722 } | |
723 } | |
724 if (AllocatePrefetchLines > 1) { | |
3854 | 725 tty->print_cr(" at distance %d, %d lines of %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); |
585 | 726 } else { |
3854 | 727 tty->print_cr(" at distance %d, one line of %d bytes", AllocatePrefetchDistance, AllocatePrefetchStepSize); |
585 | 728 } |
729 } | |
730 | |
731 if (PrefetchCopyIntervalInBytes > 0) { | |
732 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); | |
733 } | |
734 if (PrefetchScanIntervalInBytes > 0) { | |
735 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); | |
736 } | |
737 if (PrefetchFieldsAhead > 0) { | |
738 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); | |
739 } | |
740 } | |
741 #endif // !PRODUCT | |
742 } | |
743 | |
744 void VM_Version::initialize() { | |
745 ResourceMark rm; | |
746 // Making this stub must be FIRST use of assembler | |
747 | |
748 stub_blob = BufferBlob::create("getPsrInfo_stub", stub_size); | |
749 if (stub_blob == NULL) { | |
750 vm_exit_during_initialization("Unable to allocate getPsrInfo_stub"); | |
751 } | |
1748 | 752 CodeBuffer c(stub_blob); |
585 | 753 VM_Version_StubGenerator g(&c); |
754 getPsrInfo_stub = CAST_TO_FN_PTR(getPsrInfo_stub_t, | |
755 g.generate_getPsrInfo()); | |
756 | |
757 get_processor_features(); | |
758 } |