--- old/src/cpu/x86/vm/vm_version_x86.cpp 2014-07-25 15:31:08.000000000 -0700 +++ new/src/cpu/x86/vm/vm_version_x86.cpp 2014-07-25 15:31:07.000000000 -0700 @@ -559,7 +559,7 @@ FLAG_SET_DEFAULT(UseCLMUL, false); } - if (UseCLMUL && (UseAVX > 0) && (UseSSE > 2)) { + if (UseCLMUL && (UseSSE > 2)) { if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) { UseCRC32Intrinsics = true; } @@ -805,6 +805,21 @@ } } } + if ((cpu_family() == 0x06) && + ((extended_cpu_model() == 0x36) || // Centerton + (extended_cpu_model() == 0x37) || // Silvermont + (extended_cpu_model() == 0x4D))) { +#ifdef COMPILER2 + if (FLAG_IS_DEFAULT(OptoScheduling)) { + OptoScheduling = true; + } +#endif + if (supports_sse4_2()) { // Silvermont + if (FLAG_IS_DEFAULT(UseUnalignedLoadStores)) { + UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus + } + } + } } // Use count leading zeros count instruction if available. @@ -892,23 +907,25 @@ AllocatePrefetchDistance = allocate_prefetch_distance(); AllocatePrefetchStyle = allocate_prefetch_style(); - if( is_intel() && cpu_family() == 6 && supports_sse3() ) { - if( AllocatePrefetchStyle == 2 ) { // watermark prefetching on Core + if (is_intel() && cpu_family() == 6 && supports_sse3()) { + if (AllocatePrefetchStyle == 2) { // watermark prefetching on Core #ifdef _LP64 AllocatePrefetchDistance = 384; #else AllocatePrefetchDistance = 320; #endif } - if( supports_sse4_2() && supports_ht() ) { // Nehalem based cpus + if (supports_sse4_2() && supports_ht()) { // Nehalem based cpus AllocatePrefetchDistance = 192; AllocatePrefetchLines = 4; + } #ifdef COMPILER2 - if (AggressiveOpts && FLAG_IS_DEFAULT(UseFPUForSpilling)) { + if (supports_sse4_2()) { + if (FLAG_IS_DEFAULT(UseFPUForSpilling)) { FLAG_SET_DEFAULT(UseFPUForSpilling, true); } -#endif } +#endif } assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");