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Microsoft Specific
Adds the lower double-precision, floating-point values of a and b; the upper double-precision, floating-point value is passed through from a.
__m128d _mm_add_sd(__m128d a, __m128d b);
ADDSD
Return Value
r0 := a0 + b0
r1 := a1
Requirements
Header: emmintrin.h
END Microsoft Specific