double d0,

double d1,

double d2,

double d3,

double d4,

double d5

) {

return d0 + d1 + d2 + d3 + d4 + d5;

unsigned int index,

double data_hbm[512][4]

) {

#ifdef SOLUTION_0

// burst length 2, burst size 256 bit

double data[8];

for (unsigned int j = index, k = 0; j < index + 2; ++j, ++k) {

for (auto i = 0; i < 4; ++i) {

data[k*4 + i] = data_hbm[j][i];

}

}

#endif

#ifdef SOLUTION_1

// Why no bursts?

// No burst, two single transactions of size 256 bit

// HBM stall

double const data[8] = {

data_hbm[index][0], data_hbm[index][1], data_hbm[index][2], data_hbm[index][3],

data_hbm[index + 1][0], data_hbm[index + 1][1], data_hbm[index + 1][2], data_hbm[index + 1][3]

};

#endif

#ifdef SOLUTION_2

//Bursts like solution_0

double const volatile data[8] = {

data_hbm[index][0], data_hbm[index][1], data_hbm[index][2], data_hbm[index][3],

data_hbm[index + 1][0], data_hbm[index + 1][1], data_hbm[index + 1][2], data_hbm[index + 1][3]

};

#endif

return calculate_sum(

data[0], data[1], data[2],

data[4], data[5], data[6]

);

#pragma HLS INTERFACE mode=m_axi bundle=gmem0 port=indexes

#pragma HLS INTERFACE mode=m_axi bundle=gmem1 port=data_hbm

#pragma HLS INTERFACE mode=m_axi bundle=gmem2 port=out

for (auto i = 0; i < 512; ++i) {

out[i] = ram_access(indexes[i], data_hbm);

}