From: Aron Rosenberg <arosenberg@logitech.com>
Date: Fri, 4 Mar 2011 22:49:50 +0000 (-0800)
Subject: Add spin-wait pause intrinsic for Windows x64 platform.
X-Git-Tag: v0.9.7~214^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8e87d58712e4c4434c45264573c51af20d136c2a;p=libvpx

Add spin-wait pause intrinsic for Windows x64 platform.

Change-Id: I7504370c67a3c551627c6bb7e67c65f83d88b78e
---

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