Function core_arch::x86::_mm_cmp_sd

pub unsafe fn _mm_cmp_sd(a: __m128d, b: __m128d, imm8: i32) -> __m128d

This is supported on x86 and target feature avx,sse2 only.

Compares the lower double-precision (64-bit) floating-point element in a and b based on the comparison operand specified by imm8, store the result in the lower element of returned vector, and copies the upper element from a to the upper element of returned vector.

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