Function core_arch::x86::_mm_fmaddsub_pd

pub unsafe fn _mm_fmaddsub_pd(a: __m128d, b: __m128d, c: __m128d) -> __m128d

This is supported on x86 and target feature fma only.

Multiplies packed double-precision (64-bit) floating-point elements in a and b, and alternatively add and subtract packed elements in c to/from the intermediate result.

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