================
@@ -278,6 +278,23 @@
: "0"(__leaf), "2"(__count))
#endif
+/// Queries the processor to determine the highest supported \c CPUID leaf.
+///
+/// \headerfile <cpuid.h>
+///
+/// This intrinsic corresponds to the <c> CPUID </c> instruction.
+///
+/// \param __leaf
+/// \a __leaf can be either 0x0 or 0x8000000. If \a __leaf == 0x0, the
+/// highest supported value for basic \c CPUID information is returned.
+/// If \a __leaf == 0x8000000, the highest supported value for extended
+/// \c CPUID information is returned.
+/// \param __sig
+/// If the \a __sig pointer is non-null, the first four bytes of the
+/// signature (as found in the \c ebx register) are returned in the
+/// location pointed to by \a __sig.
+/// \returns Returns 0 if \c CPUID is supported; otherwise returns the value
+/// that \c CPUID returns in the \c eax register.
----------------
phoebewang wrote:
nit: would it better to use upper case `\c EAX`. The same for below.
https://github.com/llvm/llvm-project/pull/170507
_______________________________________________
cfe-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
