Replacing the _mm_srli_epi64 Function

This function is used to shift a rightwards based on the size of imm, fill 0s in the vacated bits, and return the operation result.

For details about _mm_srli_epi64, see Intrinsics Guide.

• Code on x86:

  __m128i _mm_srli_epi64 (__m128i a, int imm) ;

• Alternative for Kunpeng processors:

  #include <arm_neon.h>
  int64x2_t Arm_mm_srli_epi64 (int64x2_t a,int imm) 
  { 
  int64x2_t ret; 
  if ((imm) <= 0) { 
  ret = a; 
  } 
  else if ((imm)> 63) { 
  ret = vdupq_n_s64(0); 
  } 
  else { 
  ret = vreinterpretq_s64_u64(vshrq_n_u64(vreinterpretq_u64_s64(a), imm)); 
  } 
  return ret; 
  }