From 9d8644dee05b5280fa9aa9feb5ded1539d32bf38 Mon Sep 17 00:00:00 2001
From: Vadim Pisarevsky <no@email>
Date: Sun, 5 Dec 2010 02:26:04 +0000
Subject: [PATCH] turn off SSE2 optimization in cv::exp & cv::log in the case
 of VS2005 or earlier versions, because of missing _mm_cast* intrinsics
 (ticket #729)

---
 modules/core/src/mathfuncs.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/modules/core/src/mathfuncs.cpp b/modules/core/src/mathfuncs.cpp
index c56312a213..6f107cc374 100644
--- a/modules/core/src/mathfuncs.cpp
+++ b/modules/core/src/mathfuncs.cpp
@@ -42,6 +42,7 @@
 
 #include "precomp.hpp"
 
+
 namespace cv
 {
 
@@ -769,7 +770,13 @@ static const double expTab[] = {
     1.9571441241754002690183222516269 * EXPPOLY_32F_A0,
     1.9784560263879509682582499181312 * EXPPOLY_32F_A0,
 };
-    
+
+
+// the code below uses _mm_cast* intrinsics, which are not avialable on VS2005
+#if defined _MSC_VER && _MSC_VER < 1500
+#undef CV_SSE2
+#define CV_SSE2 0
+#endif    
     
 static const double exp_prescale = 1.4426950408889634073599246810019 * (1 << EXPTAB_SCALE);
 static const double exp_postscale = 1./(1 << EXPTAB_SCALE);