Compile error: _mm_castps_si128' was not declared

NOTE: this is 4.8 pre but I can select it form the list.

compiling[sse] painting/qdrawhelper_sse.cpp
compiling[sse2] image/qimage_sse2.cpp
compiling[sse2] painting/qdrawhelper_sse2.cpp
painting/qdrawhelper_sse2.cpp: In static member function `static long long int _vector_ QSimdSse2::v_greaterOrEqual(float _vector, float __vector_)':
painting/qdrawhelper_sse2.cpp:531: error: `_mm_castps_si128' was not declared in this scope
painting/qdrawhelper_sse2.cpp:531: warning: unused variable '_mm_castps_si128'
make[1]: *** [.obj/release-shared/qdrawhelper_sse2.o] Error 1
make[1]: Leaving directory `/home/hj/qtlib/qt-qt/src/gui'
make: *** [sub-gui-make_default-ordered] Error 2

Note if disable the sse2 then it compiles.
Is it not possible to detect this automatically?