660 UseCRC32Intrinsics = true;
661 }
662 } else if (UseCRC32Intrinsics) {
663 if (!FLAG_IS_DEFAULT(UseCRC32Intrinsics))
664 warning("CRC32 Intrinsics requires CLMUL instructions (not available on this CPU)");
665 FLAG_SET_DEFAULT(UseCRC32Intrinsics, false);
666 }
667
668 // The AES intrinsic stubs require AES instruction support (of course)
669 // but also require sse3 mode for instructions it use.
670 if (UseAES && (UseSSE > 2)) {
671 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
672 UseAESIntrinsics = true;
673 }
674 } else if (UseAESIntrinsics) {
675 if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
676 warning("AES intrinsics are not available on this CPU");
677 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
678 }
679
680 if (UseSHA) {
681 warning("SHA instructions are not available on this CPU");
682 FLAG_SET_DEFAULT(UseSHA, false);
683 }
684 if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {
685 warning("SHA intrinsics are not available on this CPU");
686 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
687 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
688 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
689 }
690
691 // Adjust RTM (Restricted Transactional Memory) flags
692 if (!supports_rtm() && UseRTMLocking) {
693 // Can't continue because UseRTMLocking affects UseBiasedLocking flag
694 // setting during arguments processing. See use_biased_locking().
695 // VM_Version_init() is executed after UseBiasedLocking is used
696 // in Thread::allocate().
697 vm_exit_during_initialization("RTM instructions are not available on this CPU");
698 }
699
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660 UseCRC32Intrinsics = true;
661 }
662 } else if (UseCRC32Intrinsics) {
663 if (!FLAG_IS_DEFAULT(UseCRC32Intrinsics))
664 warning("CRC32 Intrinsics requires CLMUL instructions (not available on this CPU)");
665 FLAG_SET_DEFAULT(UseCRC32Intrinsics, false);
666 }
667
668 // The AES intrinsic stubs require AES instruction support (of course)
669 // but also require sse3 mode for instructions it use.
670 if (UseAES && (UseSSE > 2)) {
671 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
672 UseAESIntrinsics = true;
673 }
674 } else if (UseAESIntrinsics) {
675 if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
676 warning("AES intrinsics are not available on this CPU");
677 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
678 }
679
680 // GHASH/GCM intrinsics
681 if (UseCLMUL && (UseSSE > 2)) {
682 if (FLAG_IS_DEFAULT(UseGHASHIntrinsics)) {
683 UseGHASHIntrinsics = true;
684 }
685 } else if (UseGHASHIntrinsics) {
686 if (!FLAG_IS_DEFAULT(UseGHASHIntrinsics))
687 warning("GHASH intrinsic requires CLMUL and SSE2 instructions on this CPU");
688 FLAG_SET_DEFAULT(UseGHASHIntrinsics, false);
689 }
690
691 if (UseSHA) {
692 warning("SHA instructions are not available on this CPU");
693 FLAG_SET_DEFAULT(UseSHA, false);
694 }
695 if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {
696 warning("SHA intrinsics are not available on this CPU");
697 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
698 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
699 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
700 }
701
702 // Adjust RTM (Restricted Transactional Memory) flags
703 if (!supports_rtm() && UseRTMLocking) {
704 // Can't continue because UseRTMLocking affects UseBiasedLocking flag
705 // setting during arguments processing. See use_biased_locking().
706 // VM_Version_init() is executed after UseBiasedLocking is used
707 // in Thread::allocate().
708 vm_exit_during_initialization("RTM instructions are not available on this CPU");
709 }
710
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