pub unsafe fn __cpuid_count(leaf: u32, sub_leaf: u32) -> CpuidResultAvailable on x86 and (x86 or x86-64) only.
Expand description
Returns the result of the cpuid instruction for a given leaf (EAX)
and sub_leaf (ECX).
The highest-supported leaf value is returned by the first tuple argument of
__get_cpuid_max(0). For leaves containing
sub-leaves, the second tuple argument returns the highest-supported
sub-leaf value.
The CPUID Wikipedia page contains how to query which
information using the EAX and ECX registers, and the interpretation of
the results returned in EAX, EBX, ECX, and EDX.
The references are: