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src/hotspot/cpu/x86/vm_version_x86.cpp

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  31 #include "logging/log.hpp"
  32 #include "logging/logStream.hpp"
  33 #include "memory/resourceArea.hpp"
  34 #include "memory/universe.hpp"
  35 #include "runtime/globals_extension.hpp"
  36 #include "runtime/java.hpp"
  37 #include "runtime/os.inline.hpp"
  38 #include "runtime/stubCodeGenerator.hpp"
  39 #include "runtime/vm_version.hpp"
  40 #include "utilities/checkedCast.hpp"
  41 #include "utilities/ostream.hpp"
  42 #include "utilities/powerOfTwo.hpp"
  43 #include "utilities/virtualizationSupport.hpp"
  44 
  45 int VM_Version::_cpu;
  46 int VM_Version::_model;
  47 int VM_Version::_stepping;
  48 bool VM_Version::_has_intel_jcc_erratum;
  49 VM_Version::CpuidInfo VM_Version::_cpuid_info = { 0, };
  50 
  51 #define DECLARE_CPU_FEATURE_NAME(id, name, bit) name,
  52 const char* VM_Version::_features_names[] = { CPU_FEATURE_FLAGS(DECLARE_CPU_FEATURE_NAME)};
  53 #undef DECLARE_CPU_FEATURE_NAME
  54 
  55 // Address of instruction which causes SEGV
  56 address VM_Version::_cpuinfo_segv_addr = nullptr;
  57 // Address of instruction after the one which causes SEGV
  58 address VM_Version::_cpuinfo_cont_addr = nullptr;
  59 // Address of instruction which causes APX specific SEGV
  60 address VM_Version::_cpuinfo_segv_addr_apx = nullptr;
  61 // Address of instruction after the one which causes APX specific SEGV
  62 address VM_Version::_cpuinfo_cont_addr_apx = nullptr;
  63 
  64 static BufferBlob* stub_blob;
  65 static const int stub_size = 2550;
  66 
  67 int VM_Version::VM_Features::_features_bitmap_size = sizeof(VM_Version::VM_Features::_features_bitmap) / BytesPerLong;
  68 
  69 VM_Version::VM_Features VM_Version::_features;
  70 VM_Version::VM_Features VM_Version::_cpu_features;
  71 

3265 }
3266 
3267 bool VM_Version::is_intrinsic_supported(vmIntrinsicID id) {
3268   assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
3269   switch (id) {
3270   case vmIntrinsics::_floatToFloat16:
3271   case vmIntrinsics::_float16ToFloat:
3272     if (!supports_float16()) {
3273       return false;
3274     }
3275     break;
3276   default:
3277     break;
3278   }
3279   return true;
3280 }
3281 
3282 void VM_Version::insert_features_names(VM_Version::VM_Features features, stringStream& ss) {
3283   int i = 0;
3284   ss.join([&]() {
3285     while (i < MAX_CPU_FEATURES) {
3286       if (_features.supports_feature((VM_Version::Feature_Flag)i)) {
3287         return _features_names[i++];

3288       }
3289       i += 1;
3290     }
3291     return (const char*)nullptr;
3292   }, ", ");
3293 }





































  31 #include "logging/log.hpp"
  32 #include "logging/logStream.hpp"
  33 #include "memory/resourceArea.hpp"
  34 #include "memory/universe.hpp"
  35 #include "runtime/globals_extension.hpp"
  36 #include "runtime/java.hpp"
  37 #include "runtime/os.inline.hpp"
  38 #include "runtime/stubCodeGenerator.hpp"
  39 #include "runtime/vm_version.hpp"
  40 #include "utilities/checkedCast.hpp"
  41 #include "utilities/ostream.hpp"
  42 #include "utilities/powerOfTwo.hpp"
  43 #include "utilities/virtualizationSupport.hpp"
  44 
  45 int VM_Version::_cpu;
  46 int VM_Version::_model;
  47 int VM_Version::_stepping;
  48 bool VM_Version::_has_intel_jcc_erratum;
  49 VM_Version::CpuidInfo VM_Version::_cpuid_info = { 0, };
  50 
  51 #define DECLARE_CPU_FEATURE_NAME(id, name, bit) XSTR(name),
  52 const char* VM_Version::_features_names[] = { CPU_FEATURE_FLAGS(DECLARE_CPU_FEATURE_NAME)};
  53 #undef DECLARE_CPU_FEATURE_NAME
  54 
  55 // Address of instruction which causes SEGV
  56 address VM_Version::_cpuinfo_segv_addr = nullptr;
  57 // Address of instruction after the one which causes SEGV
  58 address VM_Version::_cpuinfo_cont_addr = nullptr;
  59 // Address of instruction which causes APX specific SEGV
  60 address VM_Version::_cpuinfo_segv_addr_apx = nullptr;
  61 // Address of instruction after the one which causes APX specific SEGV
  62 address VM_Version::_cpuinfo_cont_addr_apx = nullptr;
  63 
  64 static BufferBlob* stub_blob;
  65 static const int stub_size = 2550;
  66 
  67 int VM_Version::VM_Features::_features_bitmap_size = sizeof(VM_Version::VM_Features::_features_bitmap) / BytesPerLong;
  68 
  69 VM_Version::VM_Features VM_Version::_features;
  70 VM_Version::VM_Features VM_Version::_cpu_features;
  71 

3265 }
3266 
3267 bool VM_Version::is_intrinsic_supported(vmIntrinsicID id) {
3268   assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
3269   switch (id) {
3270   case vmIntrinsics::_floatToFloat16:
3271   case vmIntrinsics::_float16ToFloat:
3272     if (!supports_float16()) {
3273       return false;
3274     }
3275     break;
3276   default:
3277     break;
3278   }
3279   return true;
3280 }
3281 
3282 void VM_Version::insert_features_names(VM_Version::VM_Features features, stringStream& ss) {
3283   int i = 0;
3284   ss.join([&]() {
3285     const char* str = nullptr;
3286     while ((i < MAX_CPU_FEATURES) && (str == nullptr)) {
3287       if (features.supports_feature((VM_Version::Feature_Flag)i)) {
3288         str = _features_names[i];
3289       }
3290       i += 1;
3291     }
3292     return str;
3293   }, ", ");
3294 }
3295 
3296 void VM_Version::get_cpu_features_name(void* features_buffer, stringStream& ss) {
3297   VM_Features* features = (VM_Features*)features_buffer;
3298   insert_features_names(*features, ss);
3299 }
3300 
3301 void VM_Version::get_missing_features_name(void* features_buffer, stringStream& ss) {
3302   VM_Features* features_to_test = (VM_Features*)features_buffer;
3303   int i = 0;
3304   ss.join([&]() {
3305     const char* str = nullptr;
3306     while ((i < MAX_CPU_FEATURES) && (str == nullptr)) {
3307       Feature_Flag flag = (Feature_Flag)i;
3308       if (features_to_test->supports_feature(flag) && !_features.supports_feature(flag)) {
3309         str = _features_names[i];
3310       }
3311       i += 1;
3312     }
3313     return str;
3314   }, ", ");
3315 }
3316 
3317 int VM_Version::cpu_features_size() {
3318   return sizeof(VM_Features);
3319 }
3320 
3321 void VM_Version::store_cpu_features(void* buf) {
3322   VM_Features copy = _features;
3323   copy.clear_feature(CPU_HT); // HT does not result in incompatibility of aot code cache
3324   memcpy(buf, &copy, sizeof(VM_Features));
3325 }
3326 
3327 bool VM_Version::supports_features(void* features_buffer) {
3328   VM_Features* features_to_test = (VM_Features*)features_buffer;
3329   return _features.supports_features(features_to_test);
3330 }
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