diff -up qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/jsruntime.pri.no_sse2 qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/jsruntime.pri
--- qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/jsruntime.pri.no_sse2	2013-12-08 11:10:19.000000000 -0600
+++ qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/jsruntime.pri	2013-12-12 11:30:36.763009499 -0600
@@ -91,7 +91,7 @@ HEADERS += \
 
 # Use SSE2 floating point math on 32 bit instead of the default
 # 387 to make test results pass on 32 and on 64 bit builds.
-linux-g++*:isEqual(QT_ARCH,i386) {
+linux-g++*:isEqual(QT_ARCH,i386):!no_sse2 {
     QMAKE_CFLAGS += -march=pentium4 -msse2 -mfpmath=sse
     QMAKE_CXXFLAGS += -march=pentium4 -msse2 -mfpmath=sse
 }
diff -up qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/qv4global_p.h.no_sse2 qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/qv4global_p.h
--- qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/qv4global_p.h.no_sse2	2013-12-08 11:10:19.000000000 -0600
+++ qtdeclarative-opensource-src-5.2.0/src/qml/jsruntime/qv4global_p.h	2013-12-12 11:32:21.555865718 -0600
@@ -45,6 +45,8 @@
 #include <QtCore/qglobal.h>
 #include <QString>
 #include <qtqmlglobal.h>
+// To get __SSE2__ defined when building with MSVC
+#include <private/qsimd_p.h>
 
 #if defined(Q_CC_MSVC)
 #include <float.h>
@@ -70,7 +72,7 @@ inline double trunc(double d) { return d
 
 // White list architectures
 
-#if defined(Q_PROCESSOR_X86)
+#if defined(Q_PROCESSOR_X86) && defined(__SSE2__)
 #define V4_ENABLE_JIT
 #elif defined(Q_PROCESSOR_X86_64)
 #define V4_ENABLE_JIT