Packed Compare for Equal Intrinsic

The prototype for this Intel® Streaming SIMD Extensions (Intel® SSE4) intrinsic is in the smmintrin.h file.

_mm_cmpeq_epi64

Performs a packed integer 64-bit comparison for equality. The intrinsic fills the corresponding parts of the result with zeroes or ones based on equality.

Corresponding instruction: PCMPEQQ