Description
Warning: [HLS 214-347] Cannot apply
performance pragma target_ti=50 cycles for loop 'VITIS_LOOP_10_1' in function 'top'.
The target requires a pipeline II less than the minimal achievable II of 2
determined by the number of accesses on stream 'c' (2 per iteration)
(test.cpp:11:9).
Explanation
There are too many accesses to the specified stream and this prevents an II=1 from being achieved. Consider reducing the number of accesses to the stream in one cycle.
//////////// ORIGINAL ////////////
void top(int a[1000],
int b[1000], hls::stream<int> &c) {
int j;
int b_buf[1000];
int a_buf[1000];
memcpy(b_buf, b, sizeof(b_buf));
for (j = 0; j < 100; j++) {
#pragma HLS performance target_ti=50
a_buf[j] = b_buf[j] + c.read() + c.read();
}
memcpy(a, a_buf, sizeof(a_buf));
}