# 1.27.0[−][src]Function core::arch::x86::_mm_cmpunord_sd

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

This is supported on x86 and target feature `sse2` only.

Returns a new vector with the low element of `a` replaced by the result of comparing both of the lower elements of `a` and `b` to `NaN`. If either is equal to `NaN` then `0xFFFFFFFFFFFFFFFF` is used and `0` otherwise.

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