[PATCH v4 01/14] eal: use rdtsc intrinsic

[Tyler Retzlaff]

Inline assembly is not supported for MSVC x64. Convert code to use
__rdtsc intrinsic.

Signed-off-by: Tyler Retzlaff <roret...@linux.microsoft.com>
---
 lib/eal/x86/include/rte_cycles.h | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/lib/eal/x86/include/rte_cycles.h b/lib/eal/x86/include/rte_cycles.h
index a461a4d..cca5122 100644
--- a/lib/eal/x86/include/rte_cycles.h
+++ b/lib/eal/x86/include/rte_cycles.h
@@ -6,6 +6,12 @@
 #ifndef _RTE_CYCLES_X86_64_H_
 #define _RTE_CYCLES_X86_64_H_
 
+#ifndef RTE_TOOLCHAIN_MSVC
+#include <x86intrin.h>
+#else
+#include <intrin.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -23,6 +29,7 @@
 static inline uint64_t
 rte_rdtsc(void)
 {
+#ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
        union {
                uint64_t tsc_64;
                RTE_STD_C11
@@ -32,7 +39,6 @@
                };
        } tsc;
 
-#ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
        if (unlikely(rte_cycles_vmware_tsc_map)) {
                /* ecx = 0x10000 corresponds to the physical TSC for VMware */
                asm volatile("rdpmc" :
@@ -42,11 +48,7 @@
                return tsc.tsc_64;
        }
 #endif
-
-       asm volatile("rdtsc" :
-                    "=a" (tsc.lo_32),
-                    "=d" (tsc.hi_32));
-       return tsc.tsc_64;
+       return __rdtsc();
 }
 
 static inline uint64_t
-- 
1.8.3.1