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comparison src/cpu/x86/vm/vm_version_x86.cpp @ 14726:92aa6797d639

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Backed out merge changeset: b51e29501f30 Backed out merge revision to its first parent (8f483e200405)
author Doug Simon <doug.simon@oracle.com>
date Mon, 24 Mar 2014 21:30:43 +0100
parents b51e29501f30
children
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14719:0bdd0d157040 14726:92aa6797d639
427 // HT processor could be installed on a system which doesn't support HT. 427 // HT processor could be installed on a system which doesn't support HT.
428 _cpuFeatures &= ~CPU_HT; 428 _cpuFeatures &= ~CPU_HT;
429 } 429 }
430 430
431 char buf[256]; 431 char buf[256];
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%s%s%s", 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",
433 cores_per_cpu(), threads_per_core(), 433 cores_per_cpu(), threads_per_core(),
434 cpu_family(), _model, _stepping, 434 cpu_family(), _model, _stepping,
435 (supports_cmov() ? ", cmov" : ""), 435 (supports_cmov() ? ", cmov" : ""),
436 (supports_cmpxchg8() ? ", cx8" : ""), 436 (supports_cmpxchg8() ? ", cx8" : ""),
437 (supports_fxsr() ? ", fxsr" : ""), 437 (supports_fxsr() ? ", fxsr" : ""),
453 (supports_lzcnt() ? ", lzcnt": ""), 453 (supports_lzcnt() ? ", lzcnt": ""),
454 (supports_sse4a() ? ", sse4a": ""), 454 (supports_sse4a() ? ", sse4a": ""),
455 (supports_ht() ? ", ht": ""), 455 (supports_ht() ? ", ht": ""),
456 (supports_tsc() ? ", tsc": ""), 456 (supports_tsc() ? ", tsc": ""),
457 (supports_tscinv_bit() ? ", tscinvbit": ""), 457 (supports_tscinv_bit() ? ", tscinvbit": ""),
458 (supports_tscinv() ? ", tscinv": ""), 458 (supports_tscinv() ? ", tscinv": ""));
459 (supports_bmi1() ? ", bmi1" : ""),
460 (supports_bmi2() ? ", bmi2" : ""));
461 _features_str = strdup(buf); 459 _features_str = strdup(buf);
462 460
463 // UseSSE is set to the smaller of what hardware supports and what 461 // UseSSE is set to the smaller of what hardware supports and what
464 // the command line requires. I.e., you cannot set UseSSE to 2 on 462 // the command line requires. I.e., you cannot set UseSSE to 2 on
465 // older Pentiums which do not support it. 463 // older Pentiums which do not support it.
600 if( supports_sse4_2() && UseSSE >= 4 ) { 598 if( supports_sse4_2() && UseSSE >= 4 ) {
601 UseSSE42Intrinsics = true; 599 UseSSE42Intrinsics = true;
602 } 600 }
603 } 601 }
604 602
603 // Use count leading zeros count instruction if available.
604 if (supports_lzcnt()) {
605 if (FLAG_IS_DEFAULT(UseCountLeadingZerosInstruction)) {
606 UseCountLeadingZerosInstruction = true;
607 }
608 }
609
605 // some defaults for AMD family 15h 610 // some defaults for AMD family 15h
606 if ( cpu_family() == 0x15 ) { 611 if ( cpu_family() == 0x15 ) {
607 // On family 15h processors default is no sw prefetch 612 // On family 15h processors default is no sw prefetch
608 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { 613 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {
609 AllocatePrefetchStyle = 0; 614 AllocatePrefetchStyle = 0;
684 // restoring upper 128bit of YMM registers on return 689 // restoring upper 128bit of YMM registers on return
685 // from signal handler. 690 // from signal handler.
686 FLAG_SET_DEFAULT(MaxVectorSize, 16); 691 FLAG_SET_DEFAULT(MaxVectorSize, 16);
687 } 692 }
688 #endif // COMPILER2 693 #endif // COMPILER2
689
690 // Use count leading zeros count instruction if available.
691 if (supports_lzcnt()) {
692 if (FLAG_IS_DEFAULT(UseCountLeadingZerosInstruction)) {
693 UseCountLeadingZerosInstruction = true;
694 }
695 } else if (UseCountLeadingZerosInstruction) {
696 warning("lzcnt instruction is not available on this CPU");
697 FLAG_SET_DEFAULT(UseCountLeadingZerosInstruction, false);
698 }
699
700 if (supports_bmi1()) {
701 if (FLAG_IS_DEFAULT(UseBMI1Instructions)) {
702 UseBMI1Instructions = true;
703 }
704 } else if (UseBMI1Instructions) {
705 warning("BMI1 instructions are not available on this CPU");
706 FLAG_SET_DEFAULT(UseBMI1Instructions, false);
707 }
708
709 // Use count trailing zeros instruction if available
710 if (supports_bmi1()) {
711 if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction)) {
712 UseCountTrailingZerosInstruction = UseBMI1Instructions;
713 }
714 } else if (UseCountTrailingZerosInstruction) {
715 warning("tzcnt instruction is not available on this CPU");
716 FLAG_SET_DEFAULT(UseCountTrailingZerosInstruction, false);
717 }
718 694
719 // Use population count instruction if available. 695 // Use population count instruction if available.
720 if (supports_popcnt()) { 696 if (supports_popcnt()) {
721 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { 697 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
722 UsePopCountInstruction = true; 698 UsePopCountInstruction = true;