1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/macroAssembler.inline.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "runtime/java.hpp" 29 #include "runtime/os.hpp" 30 #include "runtime/stubCodeGenerator.hpp" 31 #include "vm_version_sparc.hpp" 32 33 int VM_Version::_features = VM_Version::unknown_m; 34 const char* VM_Version::_features_str = ""; 35 unsigned int VM_Version::_L2_data_cache_line_size = 0; 36 37 void VM_Version::initialize() { 38 _features = determine_features(); 39 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); 40 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); 41 PrefetchFieldsAhead = prefetch_fields_ahead(); 42 43 // Allocation prefetch settings 44 intx cache_line_size = prefetch_data_size(); 45 if( cache_line_size > AllocatePrefetchStepSize ) 46 AllocatePrefetchStepSize = cache_line_size; 47 48 assert(AllocatePrefetchLines > 0, "invalid value"); 49 if( AllocatePrefetchLines < 1 ) // set valid value in product VM 50 AllocatePrefetchLines = 3; 51 assert(AllocateInstancePrefetchLines > 0, "invalid value"); 52 if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM 53 AllocateInstancePrefetchLines = 1; 54 55 AllocatePrefetchDistance = allocate_prefetch_distance(); 56 AllocatePrefetchStyle = allocate_prefetch_style(); 57 58 if (AllocatePrefetchStyle == 3 && !has_blk_init()) { 59 warning("BIS instructions are not available on this CPU"); 60 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1); 61 } 62 63 guarantee(VM_Version::has_v9(), "only SPARC v9 is supported"); 64 65 UseSSE = 0; // Only on x86 and x64 66 67 _supports_cx8 = has_v9(); 68 _supports_atomic_getset4 = true; // swap instruction 69 70 if (is_niagara()) { 71 // Indirect branch is the same cost as direct 72 if (FLAG_IS_DEFAULT(UseInlineCaches)) { 73 FLAG_SET_DEFAULT(UseInlineCaches, false); 74 } 75 // Align loops on a single instruction boundary. 76 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { 77 FLAG_SET_DEFAULT(OptoLoopAlignment, 4); 78 } 79 #ifdef _LP64 80 // 32-bit oops don't make sense for the 64-bit VM on sparc 81 // since the 32-bit VM has the same registers and smaller objects. 82 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); 83 Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); 84 #endif // _LP64 85 #ifdef COMPILER2 86 // Indirect branch is the same cost as direct 87 if (FLAG_IS_DEFAULT(UseJumpTables)) { 88 FLAG_SET_DEFAULT(UseJumpTables, true); 89 } 90 // Single-issue, so entry and loop tops are 91 // aligned on a single instruction boundary 92 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { 93 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); 94 } 95 if (is_niagara_plus()) { 96 if (has_blk_init() && UseTLAB && 97 FLAG_IS_DEFAULT(AllocatePrefetchInstr)) { 98 // Use BIS instruction for TLAB allocation prefetch. 99 FLAG_SET_ERGO(intx, AllocatePrefetchInstr, 1); 100 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { 101 FLAG_SET_ERGO(intx, AllocatePrefetchStyle, 3); 102 } 103 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { 104 // Use smaller prefetch distance with BIS 105 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); 106 } 107 } 108 if (is_T4()) { 109 // Double number of prefetched cache lines on T4 110 // since L2 cache line size is smaller (32 bytes). 111 if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) { 112 FLAG_SET_ERGO(intx, AllocatePrefetchLines, AllocatePrefetchLines*2); 113 } 114 if (FLAG_IS_DEFAULT(AllocateInstancePrefetchLines)) { 115 FLAG_SET_ERGO(intx, AllocateInstancePrefetchLines, AllocateInstancePrefetchLines*2); 116 } 117 } 118 if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { 119 // Use different prefetch distance without BIS 120 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); 121 } 122 if (AllocatePrefetchInstr == 1) { 123 // Need a space at the end of TLAB for BIS since it 124 // will fault when accessing memory outside of heap. 125 126 // +1 for rounding up to next cache line, +1 to be safe 127 int lines = AllocatePrefetchLines + 2; 128 int step_size = AllocatePrefetchStepSize; 129 int distance = AllocatePrefetchDistance; 130 _reserve_for_allocation_prefetch = (distance + step_size*lines)/(int)HeapWordSize; 131 } 132 } 133 #endif 134 } 135 136 // Use hardware population count instruction if available. 137 if (has_hardware_popc()) { 138 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { 139 FLAG_SET_DEFAULT(UsePopCountInstruction, true); 140 } 141 } else if (UsePopCountInstruction) { 142 warning("POPC instruction is not available on this CPU"); 143 FLAG_SET_DEFAULT(UsePopCountInstruction, false); 144 } 145 146 // T4 and newer Sparc cpus have new compare and branch instruction. 147 if (has_cbcond()) { 148 if (FLAG_IS_DEFAULT(UseCBCond)) { 149 FLAG_SET_DEFAULT(UseCBCond, true); 150 } 151 } else if (UseCBCond) { 152 warning("CBCOND instruction is not available on this CPU"); 153 FLAG_SET_DEFAULT(UseCBCond, false); 154 } 155 156 assert(BlockZeroingLowLimit > 0, "invalid value"); 157 if (has_block_zeroing() && cache_line_size > 0) { 158 if (FLAG_IS_DEFAULT(UseBlockZeroing)) { 159 FLAG_SET_DEFAULT(UseBlockZeroing, true); 160 } 161 } else if (UseBlockZeroing) { 162 warning("BIS zeroing instructions are not available on this CPU"); 163 FLAG_SET_DEFAULT(UseBlockZeroing, false); 164 } 165 166 assert(BlockCopyLowLimit > 0, "invalid value"); 167 if (has_block_zeroing() && cache_line_size > 0) { // has_blk_init() && is_T4(): core's local L2 cache 168 if (FLAG_IS_DEFAULT(UseBlockCopy)) { 169 FLAG_SET_DEFAULT(UseBlockCopy, true); 170 } 171 } else if (UseBlockCopy) { 172 warning("BIS instructions are not available or expensive on this CPU"); 173 FLAG_SET_DEFAULT(UseBlockCopy, false); 174 } 175 176 #ifdef COMPILER2 177 // T4 and newer Sparc cpus have fast RDPC. 178 if (has_fast_rdpc() && FLAG_IS_DEFAULT(UseRDPCForConstantTableBase)) { 179 FLAG_SET_DEFAULT(UseRDPCForConstantTableBase, true); 180 } 181 182 // Currently not supported anywhere. 183 FLAG_SET_DEFAULT(UseFPUForSpilling, false); 184 185 MaxVectorSize = 8; 186 187 assert((InteriorEntryAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); 188 #endif 189 190 assert((CodeEntryAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); 191 assert((OptoLoopAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); 192 193 char buf[512]; 194 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 195 (has_v9() ? ", v9" : (has_v8() ? ", v8" : "")), 196 (has_hardware_popc() ? ", popc" : ""), 197 (has_vis1() ? ", vis1" : ""), 198 (has_vis2() ? ", vis2" : ""), 199 (has_vis3() ? ", vis3" : ""), 200 (has_blk_init() ? ", blk_init" : ""), 201 (has_cbcond() ? ", cbcond" : ""), 202 (has_aes() ? ", aes" : ""), 203 (has_sha1() ? ", sha1" : ""), 204 (has_sha256() ? ", sha256" : ""), 205 (has_sha512() ? ", sha512" : ""), 206 (has_crc32c() ? ", crc32c" : ""), 207 (is_ultra3() ? ", ultra3" : ""), 208 (is_sun4v() ? ", sun4v" : ""), 209 (is_niagara_plus() ? ", niagara_plus" : (is_niagara() ? ", niagara" : "")), 210 (is_sparc64() ? ", sparc64" : ""), 211 (!has_hardware_mul32() ? ", no-mul32" : ""), 212 (!has_hardware_div32() ? ", no-div32" : ""), 213 (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); 214 215 // buf is started with ", " or is empty 216 _features_str = os::strdup(strlen(buf) > 2 ? buf + 2 : buf); 217 218 // UseVIS is set to the smallest of what hardware supports and what 219 // the command line requires. I.e., you cannot set UseVIS to 3 on 220 // older UltraSparc which do not support it. 221 if (UseVIS > 3) UseVIS=3; 222 if (UseVIS < 0) UseVIS=0; 223 if (!has_vis3()) // Drop to 2 if no VIS3 support 224 UseVIS = MIN2((intx)2,UseVIS); 225 if (!has_vis2()) // Drop to 1 if no VIS2 support 226 UseVIS = MIN2((intx)1,UseVIS); 227 if (!has_vis1()) // Drop to 0 if no VIS1 support 228 UseVIS = 0; 229 230 // SPARC T4 and above should have support for AES instructions 231 if (has_aes()) { 232 if (UseVIS > 2) { // AES intrinsics use MOVxTOd/MOVdTOx which are VIS3 233 if (FLAG_IS_DEFAULT(UseAES)) { 234 FLAG_SET_DEFAULT(UseAES, true); 235 } 236 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) { 237 FLAG_SET_DEFAULT(UseAESIntrinsics, true); 238 } 239 // we disable both the AES flags if either of them is disabled on the command line 240 if (!UseAES || !UseAESIntrinsics) { 241 FLAG_SET_DEFAULT(UseAES, false); 242 FLAG_SET_DEFAULT(UseAESIntrinsics, false); 243 } 244 } else { 245 if (UseAES || UseAESIntrinsics) { 246 warning("SPARC AES intrinsics require VIS3 instruction support. Intrinsics will be disabled."); 247 if (UseAES) { 248 FLAG_SET_DEFAULT(UseAES, false); 249 } 250 if (UseAESIntrinsics) { 251 FLAG_SET_DEFAULT(UseAESIntrinsics, false); 252 } 253 } 254 } 255 } else if (UseAES || UseAESIntrinsics) { 256 warning("AES instructions are not available on this CPU"); 257 if (UseAES) { 258 FLAG_SET_DEFAULT(UseAES, false); 259 } 260 if (UseAESIntrinsics) { 261 FLAG_SET_DEFAULT(UseAESIntrinsics, false); 262 } 263 } 264 265 // GHASH/GCM intrinsics 266 if (has_vis3() && (UseVIS > 2)) { 267 if (FLAG_IS_DEFAULT(UseGHASHIntrinsics)) { 268 UseGHASHIntrinsics = true; 269 } 270 } else if (UseGHASHIntrinsics) { 271 if (!FLAG_IS_DEFAULT(UseGHASHIntrinsics)) 272 warning("GHASH intrinsics require VIS3 instruction support. Intrinsics will be disabled"); 273 FLAG_SET_DEFAULT(UseGHASHIntrinsics, false); 274 } 275 276 // SHA1, SHA256, and SHA512 instructions were added to SPARC T-series at different times 277 if (has_sha1() || has_sha256() || has_sha512()) { 278 if (UseVIS > 0) { // SHA intrinsics use VIS1 instructions 279 if (FLAG_IS_DEFAULT(UseSHA)) { 280 FLAG_SET_DEFAULT(UseSHA, true); 281 } 282 } else { 283 if (UseSHA) { 284 warning("SPARC SHA intrinsics require VIS1 instruction support. Intrinsics will be disabled."); 285 FLAG_SET_DEFAULT(UseSHA, false); 286 } 287 } 288 } else if (UseSHA) { 289 warning("SHA instructions are not available on this CPU"); 290 FLAG_SET_DEFAULT(UseSHA, false); 291 } 292 293 if (UseSHA && has_sha1()) { 294 if (FLAG_IS_DEFAULT(UseSHA1Intrinsics)) { 295 FLAG_SET_DEFAULT(UseSHA1Intrinsics, true); 296 } 297 } else if (UseSHA1Intrinsics) { 298 warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU."); 299 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false); 300 } 301 302 if (UseSHA && has_sha256()) { 303 if (FLAG_IS_DEFAULT(UseSHA256Intrinsics)) { 304 FLAG_SET_DEFAULT(UseSHA256Intrinsics, true); 305 } 306 } else if (UseSHA256Intrinsics) { 307 warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU."); 308 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false); 309 } 310 311 if (UseSHA && has_sha512()) { 312 if (FLAG_IS_DEFAULT(UseSHA512Intrinsics)) { 313 FLAG_SET_DEFAULT(UseSHA512Intrinsics, true); 314 } 315 } else if (UseSHA512Intrinsics) { 316 warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU."); 317 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false); 318 } 319 320 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) { 321 FLAG_SET_DEFAULT(UseSHA, false); 322 } 323 324 // SPARC T4 and above should have support for CRC32C instruction 325 if (has_crc32c()) { 326 if (UseVIS > 2) { // CRC32C intrinsics use VIS3 instructions 327 if (FLAG_IS_DEFAULT(UseCRC32CIntrinsics)) { 328 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, true); 329 } 330 } else { 331 if (UseCRC32CIntrinsics) { 332 warning("SPARC CRC32C intrinsics require VIS3 instruction support. Intrinsics will be disabled."); 333 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, false); 334 } 335 } 336 } else if (UseCRC32CIntrinsics) { 337 warning("CRC32C instruction is not available on this CPU"); 338 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, false); 339 } 340 341 if (UseVIS > 2) { 342 if (FLAG_IS_DEFAULT(UseAdler32Intrinsics)) { 343 FLAG_SET_DEFAULT(UseAdler32Intrinsics, true); 344 } 345 } else if (UseAdler32Intrinsics) { 346 warning("SPARC Adler32 intrinsics require VIS3 instruction support. Intrinsics will be disabled."); 347 FLAG_SET_DEFAULT(UseAdler32Intrinsics, false); 348 } 349 350 if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && 351 (cache_line_size > ContendedPaddingWidth)) 352 ContendedPaddingWidth = cache_line_size; 353 354 // This machine does not allow unaligned memory accesses 355 if (UseUnalignedAccesses) { 356 if (!FLAG_IS_DEFAULT(UseUnalignedAccesses)) 357 warning("Unaligned memory access is not available on this CPU"); 358 FLAG_SET_DEFAULT(UseUnalignedAccesses, false); 359 } 360 361 #ifndef PRODUCT 362 if (PrintMiscellaneous && Verbose) { 363 tty->print_cr("L1 data cache line size: %u", L1_data_cache_line_size()); 364 tty->print_cr("L2 data cache line size: %u", L2_data_cache_line_size()); 365 tty->print("Allocation"); 366 if (AllocatePrefetchStyle <= 0) { 367 tty->print_cr(": no prefetching"); 368 } else { 369 tty->print(" prefetching: "); 370 if (AllocatePrefetchInstr == 0) { 371 tty->print("PREFETCH"); 372 } else if (AllocatePrefetchInstr == 1) { 373 tty->print("BIS"); 374 } 375 if (AllocatePrefetchLines > 1) { 376 tty->print_cr(" at distance %d, %d lines of %d bytes", (int) AllocatePrefetchDistance, (int) AllocatePrefetchLines, (int) AllocatePrefetchStepSize); 377 } else { 378 tty->print_cr(" at distance %d, one line of %d bytes", (int) AllocatePrefetchDistance, (int) AllocatePrefetchStepSize); 379 } 380 } 381 if (PrefetchCopyIntervalInBytes > 0) { 382 tty->print_cr("PrefetchCopyIntervalInBytes %d", (int) PrefetchCopyIntervalInBytes); 383 } 384 if (PrefetchScanIntervalInBytes > 0) { 385 tty->print_cr("PrefetchScanIntervalInBytes %d", (int) PrefetchScanIntervalInBytes); 386 } 387 if (PrefetchFieldsAhead > 0) { 388 tty->print_cr("PrefetchFieldsAhead %d", (int) PrefetchFieldsAhead); 389 } 390 if (ContendedPaddingWidth > 0) { 391 tty->print_cr("ContendedPaddingWidth %d", (int) ContendedPaddingWidth); 392 } 393 } 394 #endif // PRODUCT 395 } 396 397 void VM_Version::print_features() { 398 tty->print_cr("Version:%s", cpu_features()); 399 } 400 401 int VM_Version::determine_features() { 402 if (UseV8InstrsOnly) { 403 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) 404 return generic_v8_m; 405 } 406 407 int features = platform_features(unknown_m); // platform_features() is os_arch specific 408 409 if (features == unknown_m) { 410 features = generic_v9_m; 411 warning("Cannot recognize SPARC version. Default to V9"); 412 } 413 414 assert(is_T_family(features) == is_niagara(features), "Niagara should be T series"); 415 if (UseNiagaraInstrs) { // Force code generation for Niagara 416 if (is_T_family(features)) { 417 // Happy to accomodate... 418 } else { 419 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) 420 features |= T_family_m; 421 } 422 } else { 423 if (is_T_family(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { 424 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) 425 features &= ~(T_family_m | T1_model_m); 426 } else { 427 // Happy to accomodate... 428 } 429 } 430 431 return features; 432 } 433 434 static int saved_features = 0; 435 436 void VM_Version::allow_all() { 437 saved_features = _features; 438 _features = all_features_m; 439 } 440 441 void VM_Version::revert() { 442 _features = saved_features; 443 } 444 445 unsigned int VM_Version::calc_parallel_worker_threads() { 446 unsigned int result; 447 if (is_M_series()) { 448 // for now, use same gc thread calculation for M-series as for niagara-plus 449 // in future, we may want to tweak parameters for nof_parallel_worker_thread 450 result = nof_parallel_worker_threads(5, 16, 8); 451 } else if (is_niagara_plus()) { 452 result = nof_parallel_worker_threads(5, 16, 8); 453 } else { 454 result = nof_parallel_worker_threads(5, 8, 8); 455 } 456 return result; 457 }