Struct Argument Packing¶
Syntax
#pragma HLS memory impl argument(<arg_name>) pack(bit|byte) byte_enable(true|false)
Description
The pragma is to be used to pack a local memory variable with struct type. There are two packing modes: bit / byte where bit packing packs the struct fields using the exact bit-width and byte mode packs the fields with 8-bit alignment. byte_enable option creates an interface with byte enable signals to write individual fields when set to true. Note that byte_enable is only valid with byte packing.
Parameters
Parameter |
Value |
Optional |
Default |
Description |
|---|---|---|---|---|
|
String |
No |
Argument name |
|
|
|
No |
Packing Mode |
|
|
|
Yes |
|
Use byte-enable to write struct fields |
Position
At the beginning of the function definition block.
Examples
int sum(struct S &s) {
#pragma HLS function top
#pragma HLS memory impl argument(s) pack(btye) byte_enable(true)
...
}