From a789b77b75717c2b3524b0886a4ee67987f0e1e3 Mon Sep 17 00:00:00 2001
From: Zhang Xianyi <traits.zhang@gmail.com>
Date: Tue, 28 Jan 2014 16:40:19 +0800
Subject: [PATCH] Used SwitchToThread for YIELDING on AMD piledriver with
 Windows.

---
 common.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common.h b/common.h
index 4e3230d7e..57294eb02 100644
--- a/common.h
+++ b/common.h
@@ -315,9 +315,10 @@ typedef int blasint;
 #endif
 
 #ifdef PILEDRIVER
+#ifndef YIELDING
 #define YIELDING        __asm__ __volatile__ ("nop;nop;nop;nop;nop;nop;nop;nop;\n");
 #endif
-
+#endif
 
 #ifndef YIELDING
 #define YIELDING	sched_yield()