Microsoft Specific
Selects and interleaves the lower two single-precision, floating-point values from a and b.
__m128 _mm_unpacklo_ps(__m128 a , __m128 b ); UNPCKLPS
r0 := a0 r1 := b0 r2 := a1 r3 := b1
Header: mmintrin.h
END Microsoft Specific