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comparison src/cpu/x86/vm/vm_version_x86.cpp @ 14704:b51e29501f30

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Merged with jdk9/dev/hotspot changeset 9486a41de3b7
author twisti
date Tue, 18 Mar 2014 20:19:10 -0700
parents 6b0fd0964b87 9e9af3aa4278
children 92aa6797d639
comparison
equal deleted inserted replaced
14647:8f483e200405 14704:b51e29501f30
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", 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",
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" : ""));
459 _features_str = strdup(buf); 461 _features_str = strdup(buf);
460 462
461 // UseSSE is set to the smaller of what hardware supports and what 463 // UseSSE is set to the smaller of what hardware supports and what
462 // the command line requires. I.e., you cannot set UseSSE to 2 on 464 // the command line requires. I.e., you cannot set UseSSE to 2 on
463 // older Pentiums which do not support it. 465 // older Pentiums which do not support it.
598 if( supports_sse4_2() && UseSSE >= 4 ) { 600 if( supports_sse4_2() && UseSSE >= 4 ) {
599 UseSSE42Intrinsics = true; 601 UseSSE42Intrinsics = true;
600 } 602 }
601 } 603 }
602 604
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
610 // some defaults for AMD family 15h 605 // some defaults for AMD family 15h
611 if ( cpu_family() == 0x15 ) { 606 if ( cpu_family() == 0x15 ) {
612 // On family 15h processors default is no sw prefetch 607 // On family 15h processors default is no sw prefetch
613 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { 608 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {
614 AllocatePrefetchStyle = 0; 609 AllocatePrefetchStyle = 0;
689 // restoring upper 128bit of YMM registers on return 684 // restoring upper 128bit of YMM registers on return
690 // from signal handler. 685 // from signal handler.
691 FLAG_SET_DEFAULT(MaxVectorSize, 16); 686 FLAG_SET_DEFAULT(MaxVectorSize, 16);
692 } 687 }
693 #endif // COMPILER2 688 #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 }
694 718
695 // Use population count instruction if available. 719 // Use population count instruction if available.
696 if (supports_popcnt()) { 720 if (supports_popcnt()) {
697 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { 721 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
698 UsePopCountInstruction = true; 722 UsePopCountInstruction = true;