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## _mm_mask3_fnmadd_sd

# Function _mm_mask3_fnmadd_sd

1.89.0 (const: unstable) · Source

    pub fn _mm_mask3_fnmadd_sd(
        a: __m128d,
        b: __m128d,
        c: __m128d,
        k: __mmask8,
    ) -> __m128d

Available on x86-64 and target feature `avx512f` only.
Expand description

Multiply the lower double-precision (64-bit) floating-point elements in a and b, and add the negated intermediate result to the lower element in c. Store the result in the lower element of dst using writemask k (the element is copied from c when mask bit 0 is not set), and copy the upper element from c to the upper element of dst.

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