diff options
Diffstat (limited to 'base/cpu.cc')
| -rw-r--r-- | base/cpu.cc | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/base/cpu.cc b/base/cpu.cc index 41ebc083..ff02fb4 100644 --- a/base/cpu.cc +++ b/base/cpu.cc @@ -39,14 +39,16 @@ void CPU::Initialize() { *(reinterpret_cast<int*>(cpu_string+8)) = cpu_info[2]; // Interpret CPU feature information. - __cpuid(cpu_info, 1); - stepping_ = cpu_info[0] & 0xf; - model_ = (cpu_info[0] >> 4) & 0xf; - family_ = (cpu_info[0] >> 8) & 0xf; - type_ = (cpu_info[0] >> 12) & 0x3; - ext_model_ = (cpu_info[0] >> 16) & 0xf; - ext_family_ = (cpu_info[0] >> 20) & 0xff; - cpu_vendor_ = cpu_string; + if (num_ids > 0) { + __cpuid(cpu_info, 1); + stepping_ = cpu_info[0] & 0xf; + model_ = (cpu_info[0] >> 4) & 0xf; + family_ = (cpu_info[0] >> 8) & 0xf; + type_ = (cpu_info[0] >> 12) & 0x3; + ext_model_ = (cpu_info[0] >> 16) & 0xf; + ext_family_ = (cpu_info[0] >> 20) & 0xff; + cpu_vendor_ = cpu_string; + } } } // namespace base |