Description
Warning: [214-233]
DataType
allocated space contains padding is unsupported (DebugLoc).- DataType
- LLVM Type
Explanation
Ensure that the data type of the top-level interface ports uses a total number of bits that is a power of 2. This avoids adding of padding bits.
Example
constexpr uint64_t N = 64;
//////////// ORIGINAL ////////////
void example(ap_int<24> a[N], ap_int<24> b[N]) {
#pragma HLS INTERFACE m_axi port = a depth = N bundle = gmem0
#pragma HLS INTERFACE m_axi port = b depth = N bundle = gmem1
ap_int<24> buff[N];
for (size_t i = 0; i < N; ++i) {
#pragma HLS PIPELINE II = 1
buff[i] = a[i];
buff[i] = buff[i] + 100;
b[i] = buff[i];
}
}
//////////// UPDATED ////////////
// Replace with power of 2 bits type.
void example(int a[N], int b[N]) {
#pragma HLS INTERFACE m_axi port = a depth = N bundle = gmem0
#pragma HLS INTERFACE m_axi port = b depth = N bundle = gmem1
int buff[N];
for (size_t i = 0; i < N; ++i) {
#pragma HLS PIPELINE II = 1
buff[i] = a[i];
buff[i] = buff[i] + 100;
b[i] = buff[i];
}
}