Replacing the _mm_add_epi64 Function

This function is used to add two 64-bit integers in vectors a and b, and save and output the results.

For details about _mm_add_epi64, see Intrinsics Guide.

• Code on x86:

  __m128i _mm_add_epi64(__m128i a, __m128i b)

• Alternative for Kunpeng processors:

  #include <arm_neon.h>
  Int64x2_t vaddq_s64(Int64x2_t a, Int64x2_t b);