Function core::arch::x86_64::__cpuid_count
1.27.0 · source · pub unsafe fn __cpuid_count(leaf: u32, sub_leaf: u32) -> CpuidResult
Available on x86-64 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 containung
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: