From 5946514408199d172f4eb2f72f0b7691a5826b41 Mon Sep 17 00:00:00 2001
From: castano <castano@95f4ed2b-212e-0410-8b90-d31948207fce>
Date: Wed, 12 Dec 2007 21:55:28 +0000
Subject: [PATCH] Do not use CUDA on emulation devices.

---
 src/nvtt/cuda/CudaUtils.cpp | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/nvtt/cuda/CudaUtils.cpp b/src/nvtt/cuda/CudaUtils.cpp
index 6e9cc8e..809d791 100644
--- a/src/nvtt/cuda/CudaUtils.cpp
+++ b/src/nvtt/cuda/CudaUtils.cpp
@@ -74,11 +74,24 @@ bool nv::cuda::isHardwarePresent()
 {
 #if defined HAVE_CUDA
 #if NV_OS_WIN32
-	return !isWindowsVista() && deviceCount() > 0;
-	//return !isWindowsVista() && isWow32() && deviceCount() > 0;
-#else
-	return deviceCount() > 0;
+	if (isWindowsVista()) return false;
+	//if (isWindowsVista() || !isWow32()) return false;
 #endif
+	int count = deviceCount();
+	if (count == 1)
+	{
+		// Make sure it's not an emulation device.
+	    cudaDeviceProp deviceProp;
+		cudaGetDeviceProperties(&deviceProp, 0);
+
+		// deviceProp.name != Device Emulation (CPU)
+		if (deviceProp.major == -1 || deviceProp.minor == -1)
+		{
+			return false;
+		}
+	}
+
+	return count > 0;
 #else
 	return false;
 #endif