The ihc_hls_enqueue and ihc_hls_enqueue_noret functions allow a new invocation of a
component to start every cycle if the component can be pipelined with a component initiation
interval (II) of one. If the component II is greater than one, then the
next
component invocation starts after II number of cycles.
Waveform Diagram of the Signals for Component dut Without Enqueue Function Calls illustrates the waveform of the signals for the component dut. The testbench does not include any enqueue function calls.
#include "HLS/hls.h"
#include <stdio.h>
component int dut(int a, int b) {
return a*b;
}
int main (void) {
int x1, x2, x3;
x1 = dut(1, 2);
x2 = dut(3, 4);
x3 = dut(5, 6);
printf("x1 = %d, x2 = %d, x3 = %d\n", x1, x2, x3);
return 0;
}
Figure 2. Waveform Diagram of the Signals for Component
dut
Without Enqueue Function Calls
Waveform Diagram of
the Signals for Component dut With Enqueue Function
Calls illustrates the waveform of the signals for the component
dut when the testbench includes enqueue function calls.
Observe how the component is passed new data each clock cycle, and compare this waveform with
the earlier
waveform.
#include "HLS/hls.h"
#include <stdio.h>
component int dut(int a, int b) {
return a*b;
}
int main (void) {
int x1, x2, x3;
ihc_hls_enqueue(&x1, &dut, 1, 2);
ihc_hls_enqueue(&x2, &dut, 3, 4);
ihc_hls_enqueue(&x3, &dut, 5, 6);
ihc_hls_component_run_all(&dut);
printf("x1 = %d, x2 = %d, x3 = %d\n", x1, x2, x3);
return 0;
}
Figure 3. Waveform Diagram of the Signals for Component
dut
With Enqueue Function Calls
