pragma SDS data zero_copy
Description
The COPY pragma implies that data is explicitly copied between the
host processor memory and the hardware function, using a suitable data mover for the
transfer. The ZERO_COPY pragma means that the hardware function
accesses the data directly from shared memory through an AXI master bus interface.
Example 1
The following example shows a ZERO_COPY pragma with multiple arrays specified to
generate a direct memory interface with DDR and the hardware
function:
#pragma SDS data zero_copy(in1[0:mat_dim*mat_dim], in2[0:mat_dim*mat_dim], out[0:mat_dim*mat_dim])
void matmul_partition_accel(int *in1, // Read-Only Matrix 1
int *in2, // Read-Only Matrix 2
int *out, // Output Result
int mat_dim); // Matrix Dim (assumed only square matrix) {
...
}