turn off SSE2 optimization in cv::exp & cv::log in the case of VS2005 or earlier…

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

@@ -42,6 +42,7 @@
 
 #include "precomp.hpp"
 
+
 namespace cv
 {
 
@@ -771,6 +772,12 @@ static const double expTab[] = {
 };
 
 
+// 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);
 static const double exp_max_val = 3000.*(1 << EXPTAB_SCALE); // log10(DBL_MAX) < 3000