message: removed unused builtin ; fixed comments
diff: @@ -121,8 +121,6 @@ __device__ __forceinline__ void rocsparse_blockreduce_max(int i, T* data)
  }
  #if defined(__HIP_PLATFORM_HCC__)
  -__device__ int __llvm_amdgcn_readlane(int index, int offset) __asm("llvm.amdgcn.readlane");
  -
  // DPP-based wavefront reduction combination of sum and max
  template <unsigned int WFSIZE>
  __device__ __forceinline__ void rocsparse_wfreduce_max(rocsparse_int* maximum)
  @@ -135,7 +133,7 @@ __device__ __forceinline__ void rocsparse_wfreduce_max(rocsparse_int* maximum)
  if(WFSIZE > 32) *maximum = max(*maximum, __hip_move_dpp(*maximum, 0x143, 0xc, 0xf, 0));
  }
  -// Swizzle-based float wavefront reduction sum
  +// DPP-based float wavefront reduction sum
  template <unsigned int WFSIZE>
  __device__ __forceinline__ float rocsparse_wfreduce_sum(float sum)
  {
  @@ -189,7 +187,7 @@ __device__ __forceinline__ float rocsparse_wfreduce_sum(float sum)
  return sum;
  }
  -// Swizzle-based double wavefront reduction
  +// DPP-based double wavefront reduction
  template <unsigned int WFSIZE>
  __device__ __forceinline__ double rocsparse_wfreduce_sum(double sum)
  {
  