Intel® Architecture Instruction Set Extensions Programming Reference

ECX ← Reserved = 0;
EDX ← Reserved = 0;
BREAK;
EAX = 9H:
EAX ← Direct Cache Access Information Leaf; (* See Table 2-23. *)
EBX ← Direct Cache Access Information Leaf;
ECX ← Direct Cache Access Information Leaf;
EDX ← Direct Cache Access Information Leaf;
BREAK;
EAX = AH:
EAX ← Architectural Performance Monitoring Leaf; (* See Table 2-23. *)
EBX ← Architectural Performance Monitoring Leaf;
ECX ← Architectural Performance Monitoring Leaf;
EDX ← Architectural Performance Monitoring Leaf;
BREAK
EAX = BH:
EAX ← Extended Topology Enumeration Leaf; (* See Table 2-23. *)
EBX ← Extended Topology Enumeration Leaf;
ECX ← Extended Topology Enumeration Leaf;
EDX ← Extended Topology Enumeration Leaf;
BREAK;
EAX = CH:
EAX ← Reserved = 0;
EBX ← Reserved = 0;
ECX ← Reserved = 0;
EDX ← Reserved = 0;
BREAK;
EAX = DH:
EAX ← Processor Extended State Enumeration Leaf; (* See Table 2-23. *)
EBX ← Processor Extended State Enumeration Leaf;
ECX ← Processor Extended State Enumeration Leaf;
EDX ← Processor Extended State Enumeration Leaf;
BREAK;
BREAK;
EAX = 80000000H:
EAX ← Highest extended function input value understood by CPUID;
EBX ← Reserved;
ECX ← Reserved;
EDX ← Reserved;
BREAK;
EAX = 80000001H:
EAX ← Reserved;
EBX ← Reserved;
ECX ← Extended Feature Bits (* See Table 2-23.*);
EDX ← Extended Feature Bits (* See Table 2-23. *);
BREAK;
EAX = 80000002H:
EAX ← Processor Brand String;
EBX ← Processor Brand String, continued;
ECX ← Processor Brand String, continued;
EDX ← Processor Brand String, continued;
BREAK;
EAX = 80000003H:
EAX ← Processor Brand String, continued;
APPLICATION PROGRAMMING MODEL
Ref. # 319433-014 2-51