From 14ff55d13b36fd58ff1d15bb745a59f036879a7d Mon Sep 17 00:00:00 2001
From: bushing <bushing@gmail.com>
Date: Sat, 6 Dec 2008 03:17:42 +0000
Subject: [PATCH] add support for GCC 4.0

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@1407 8ced0084-cf51-0410-be5f-012b33b47a6e
---
 Source/Core/Common/Src/Thread.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Common/Src/Thread.cpp b/Source/Core/Common/Src/Thread.cpp
index 3e6032bdbd..ab045a808e 100644
--- a/Source/Core/Common/Src/Thread.cpp
+++ b/Source/Core/Common/Src/Thread.cpp
@@ -390,8 +390,12 @@ LONG SyncInterlockedExchange(LONG *Dest, LONG Val)
 #if defined(__GNUC__) && defined (__GNUC_MINOR__) && ((4 < __GNUC__) || (4 == __GNUC__ && 1 <= __GNUC_MINOR__))
   return  __sync_lock_test_and_set(Dest, Val);
 #else
-	// TODO:
-	#error Implement support older GCC Versions
+  register int result;
+  __asm__ __volatile__("lock; xchg %0,%1"
+                       : "=r" (result), "=m" (*Dest)
+                       : "0" (Val), "m" (*Dest)
+                       : "memory");
+  return result;
 #endif
 }