x86/timer: implement an intrinsic-based version for rdtsc (AV_READ_TIME).

1 files changed, 3 insertions, 0 deletions

diff --git a/configure b/configure
index a08b3af79e..ec68648520 100755
--- a/configure
+++ b/configure
@@ -1121,6 +1121,7 @@ HAVE_LIST="
     netinet_sctp_h
     poll_h
     posix_memalign
+    rdtsc
     round
     roundf
     sched_getaffinity
@@ -2642,6 +2643,8 @@ check_cc <<EOF && enable inline_asm
 void foo(void) { __asm__ volatile ("" ::); }
 EOF
 
+check_code cc intrin.h "__rdtsc()" && enable rdtsc
+
 _restrict=
 for restrict_keyword in restrict __restrict__ __restrict; do
     check_cc <<EOF && _restrict=$restrict_keyword && break