402       } else {
 403         result = (_cpuid_info.dcp_cpuid4_eax.bits.cores_per_cpu + 1);
 404       }
 405     } else if (is_amd()) {
 406       result = (_cpuid_info.ext_cpuid8_ecx.bits.cores_per_cpu + 1);
 407     }
 408     return result;
 409   }
 410 
 411   static uint threads_per_core()  {
 412     uint result = 1;
 413     if (is_intel() && supports_processor_topology()) {
 414       result = _cpuid_info.tpl_cpuidB0_ebx.bits.logical_cpus;
 415     } else if (_cpuid_info.std_cpuid1_edx.bits.ht != 0) {
 416       result = _cpuid_info.std_cpuid1_ebx.bits.threads_per_cpu /
 417                cores_per_cpu();
 418     }
 419     return result;
 420   }
 421 
 422   static intx L1_data_cache_line_size()  {
 423     intx result = 0;
 424     if (is_intel()) {
 425       result = (_cpuid_info.dcp_cpuid4_ebx.bits.L1_line_size + 1);
 426     } else if (is_amd()) {
 427       result = _cpuid_info.ext_cpuid5_ecx.bits.L1_line_size;
 428     }
 429     if (result < 32) // not defined ?
 430       result = 32;   // 32 bytes by default on x86 and other x64
 431     return result;
 432   }
 433 
 434   //
 435   // Feature identification
 436   //
 437   static bool supports_cpuid()    { return _cpuFeatures  != 0; }
 438   static bool supports_cmpxchg8() { return (_cpuFeatures & CPU_CX8) != 0; }
 439   static bool supports_cmov()     { return (_cpuFeatures & CPU_CMOV) != 0; }
 440   static bool supports_fxsr()     { return (_cpuFeatures & CPU_FXSR) != 0; }
 441   static bool supports_ht()       { return (_cpuFeatures & CPU_HT) != 0; }
 442   static bool supports_mmx()      { return (_cpuFeatures & CPU_MMX) != 0; }

 402       } else {
 403         result = (_cpuid_info.dcp_cpuid4_eax.bits.cores_per_cpu + 1);
 404       }
 405     } else if (is_amd()) {
 406       result = (_cpuid_info.ext_cpuid8_ecx.bits.cores_per_cpu + 1);
 407     }
 408     return result;
 409   }
 410 
 411   static uint threads_per_core()  {
 412     uint result = 1;
 413     if (is_intel() && supports_processor_topology()) {
 414       result = _cpuid_info.tpl_cpuidB0_ebx.bits.logical_cpus;
 415     } else if (_cpuid_info.std_cpuid1_edx.bits.ht != 0) {
 416       result = _cpuid_info.std_cpuid1_ebx.bits.threads_per_cpu /
 417                cores_per_cpu();
 418     }
 419     return result;
 420   }
 421 
 422   static intx prefetch_data_size()  {
 423     intx result = 0;
 424     if (is_intel()) {
 425       result = (_cpuid_info.dcp_cpuid4_ebx.bits.L1_line_size + 1);
 426     } else if (is_amd()) {
 427       result = _cpuid_info.ext_cpuid5_ecx.bits.L1_line_size;
 428     }
 429     if (result < 32) // not defined ?
 430       result = 32;   // 32 bytes by default on x86 and other x64
 431     return result;
 432   }
 433 
 434   //
 435   // Feature identification
 436   //
 437   static bool supports_cpuid()    { return _cpuFeatures  != 0; }
 438   static bool supports_cmpxchg8() { return (_cpuFeatures & CPU_CX8) != 0; }
 439   static bool supports_cmov()     { return (_cpuFeatures & CPU_CMOV) != 0; }
 440   static bool supports_fxsr()     { return (_cpuFeatures & CPU_FXSR) != 0; }
 441   static bool supports_ht()       { return (_cpuFeatures & CPU_HT) != 0; }
 442   static bool supports_mmx()      { return (_cpuFeatures & CPU_MMX) != 0; }