Confusion about data type alignment

[Altera_Forum]

I need to transfer 128 structures from host to FPGA. In the host code,I define the structure as following: 

 *********************************************************************# define AOCL_ALIGNMENT 64 typedef struct {  double S;   double X;   double u;   double e_rt_p;  double e_rt_q;  int CP; }struct_A; struct_A* input_A; input_A=(struct_A *)_aligned_malloc(128*sizeof(struct_A),AOCL_ALIGNMENT); *********************************************************************** in the kernel code,I define the structure as following: ********************************************************************** typedef struct __attribute__((packed)) __attribute__((aligned(64))) {  double S;   double X;   double u;   double e_rt_p;  double e_rt_q;  int CP; }struct_A;   __kernel void kernels(__global double* restrict output_data, __global struct_A* restrict input_data)   for (int i=0;i<128;i++){  S = input_data.S;  X = input_data.X;  u = input_data.u;  e_rt_p = input_data.e_rt_p;  e_rt_q = input_data.e_rt_q;  CP = input_data.CP;  } ************************************************************************************* BUT, I can't get the values of S~cp in right order, when I remove "__attribute__((packed)) __attribute__((aligned(64)))", I can get the right values of S~cp. Can anyone figure out what's the problem in my code?Thanks very much.