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From: Matt Macy <mmacy@FreeBSD.org>
Date: Thu, 7 Jun 2018 00:54:12 +0000 (UTC)
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Subject: svn commit: r334746 - in head/sys: amd64/include i386/include
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Author: mmacy
Date: Thu Jun  7 00:54:11 2018
New Revision: 334746
URL: https://svnweb.freebsd.org/changeset/base/334746

Log:
  cpufunc: add rdtscp for x86

Modified:
  head/sys/amd64/include/cpufunc.h
  head/sys/i386/include/cpufunc.h

Modified: head/sys/amd64/include/cpufunc.h
==============================================================================
--- head/sys/amd64/include/cpufunc.h	Thu Jun  7 00:24:10 2018	(r334745)
+++ head/sys/amd64/include/cpufunc.h	Thu Jun  7 00:54:11 2018	(r334746)
@@ -386,6 +386,15 @@ rdtsc(void)
 	return (low | ((uint64_t)high << 32));
 }
 
+static __inline uint64_t
+rdtscp(void)
+{
+	uint32_t low, high;
+
+	__asm __volatile("rdtscp" : "=a" (low), "=d" (high));
+	return (low | ((uint64_t)high << 32));
+}
+
 static __inline uint32_t
 rdtsc32(void)
 {

Modified: head/sys/i386/include/cpufunc.h
==============================================================================
--- head/sys/i386/include/cpufunc.h	Thu Jun  7 00:24:10 2018	(r334745)
+++ head/sys/i386/include/cpufunc.h	Thu Jun  7 00:54:11 2018	(r334746)
@@ -368,6 +368,15 @@ rdtsc(void)
 	return (rv);
 }
 
+static __inline uint64_t
+rdtscp(void)
+{
+	uint64_t rv;
+
+	__asm __volatile("rdtscp" : "=A" (rv));
+	return (rv);
+}
+
 static __inline uint32_t
 rdtsc32(void)
 {