From 8e87d58712e4c4434c45264573c51af20d136c2a Mon Sep 17 00:00:00 2001
From: Aron Rosenberg <arosenberg@logitech.com>
Date: Fri, 4 Mar 2011 14:49:50 -0800
Subject: [PATCH] Add spin-wait pause intrinsic for Windows x64 platform.

Change-Id: I7504370c67a3c551627c6bb7e67c65f83d88b78e
---
 vpx_ports/x86.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vpx_ports/x86.h b/vpx_ports/x86.h
index 190c8643a..b0130fbfe 100644
--- a/vpx_ports/x86.h
+++ b/vpx_ports/x86.h
@@ -151,8 +151,8 @@ x86_readtsc(void)
     __asm__ __volatile__ ("pause \n\t")
 #else
 #if ARCH_X86_64
-/* No pause intrinsic for windows x64 */
-#define x86_pause_hint()
+#define x86_pause_hint()\
+    _mm_pause();
 #else
 #define x86_pause_hint()\
     __asm pause