Pipeline Loop¶
Syntax
#pragma HLS loop pipeline II(<int>)
Description
This pragma enables pipelining for a given loop in the code. Loop pipelining allows a new iteration of the loop to begin before the current one has completed, achieving higher throughput. It can be specified to pipeline a single loop or a nested loop. If specified on a single loop or on a inner loop of a nested loop, that loop will be pipelined. If specified on the outer loop of a nested loop, the outer loop will be pipelined and all of its inner loops will be automatically unrolled.
Parameters
Parameter |
Value |
Optional |
Default |
Description |
|---|---|---|---|---|
|
Integer |
Yes |
1 |
Pipeline initiation interval |
Position
Before the beginning of the loop. If there is a loop label, the pragma should be placed after the label.
Examples
#pragma HLS loop pipeline II(2)
for (int i = 0; i < 10; i++) {
...
}
LOOP_LABEL:
#pragma HLS loop pipeline
while (i < 10) {
...
}