[PATCH 5/6] include: Add __rdtsc and __rdtscp intrinsics.
Jacek Caban
jacek at codeweavers.com
Wed Mar 10 14:44:01 CST 2021
On 10.03.2021 17:13, Rémi Bernon wrote:
> Apparently clang >= 4.0.0 has __rdtsc (but not __rdtscp). Can we just
> assume clang >= 4.0.0 is used and something like that would be
> acceptable instead?
There is __has_builtin(), which would be cleaner in this case, IMHO.
Both compilers ship __rdtscp in ia32intrin.h header (gcc also __rdtscp,
which clang doesn't need). I was considering something like this inside
our intrin.h:
#if defined(__i386__) || defined(__x86_64__)
# include <x86intrin.h>
#endif
I believe that this should solve your problem. This rises some
compatibility concerns, but I think it may be fine. It's shipped with
compilers themselves for all platforms (not by mingw-w64).
Jacek
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