Function swiss_army_knife::simd_compatibility::x86_64::sse2::_mm_blend_epi64

pub unsafe fn _mm_blend_epi64(a: __m128i, b: __m128i, imm8: i32) -> __m128i

This is efficient and compiles down to the same assembler as _mm_blend_epi32() but with a different immediate value used for the control word.

imm8 is a control value between 0 and 7 inclusive; if a bit is set, then the equivalent lane from b is copied otherwise the lane from a is copied.